Symaptic: os/graphics/graphicscomposition/openwfcompositionengine/common/src/owfimage.c@bde4ae8d615e

     1 /* Copyright (c) 2009-2010 The Khronos Group Inc.

     2  * Portions copyright (c) 2009-2010  Nokia Corporation and/or its subsidiary(-ies)

     3  *

     4  * Permission is hereby granted, free of charge, to any person obtaining a

     5  * copy of this software and/or associated documentation files (the

     6  * "Materials"), to deal in the Materials without restriction, including

     7  * without limitation the rights to use, copy, modify, merge, publish,

     8  * distribute, sublicense, and/or sell copies of the Materials, and to

     9  * permit persons to whom the Materials are furnished to do so, subject to

    10  * the following conditions:

    11  *

    12  * The above copyright notice and this permission notice shall be included

    13  * in all copies or substantial portions of the Materials.

    14  *

    15  * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

    16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

    17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

    18  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

    19  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

    20  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

    21  * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.

    22  */

    24 #ifdef __cplusplus

    25 extern "C"

    26 {

    27 #endif

    29 #include <string.h>

    30 #include <stdlib.h>

    31 #include <stdio.h>

    32 #include <math.h>

    34 #include "owfobject.h"

    35 #include "owfimage.h"

    36 #include "owfutils.h"

    37 #include "owfmemory.h"

    38 #include "owfdebug.h"

    39 #include "owfdisplaycontextgeneral.h"

    41 #ifdef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

    42 #define roundSubPixel(p) ((OWFuint32)((p) + 0.5f))

    43 #else

    44 #define roundSubPixel(p) (p)

    45 #endif

    48 /*----------------------------------------------------------------------------*/

    49 OWF_API_CALL void

    50 OWF_IMAGE_Ctor(void* self)

    51 {

    52     DPRINT(("OWF_IMAGE_Ctor"));

    54     self = self;

    55 }

    57 /*----------------------------------------------------------------------------*/

    58 OWF_API_CALL void

    59 OWF_IMAGE_Dtor(void* self)

    60 {

    61     OWF_IMAGE* image;

    63     DPRINT(("OWF_IMAGE_Dtor"));

    65     image = (OWF_IMAGE*)self;

    67     if (image && image->data)

    68     {

    69         if (!image->foreign)

    70         {

    71             OWF_Image_FreeData(0, &image->data);

    72         }

    73     }

    75     if (image)

    76     {

    77         memset(image, 0, sizeof(OWF_IMAGE));

    78     }

    79 }

    81 /*----------------------------------------------------------------------------*/

    82 static OWFfloat

    83 NonLinear(OWFfloat x)

    84 {

    85     if (x <= 0.00304f)

    86     {

    87         return 12.92f * x;

    88     }

    89     return 1.0556f * pow(x, 1.f/2.4f) - 0.0556f;

    90 }

    92 /*----------------------------------------------------------------------------*/

    93 static OWFfloat

    94 Linear(OWFfloat x)

    95 {

    96     if (x <= 0.03928)

    97     {

    98         return x / 12.92f;

    99     }

   100     return pow((x + 0.0556f) / 1.0556f, 2.4f);

   101 }

   103 /*----------------------------------------------------------------------------*/

   104 OWF_API_CALL void

   105 OWF_Image_NonLinearizeData(OWF_IMAGE* image)\

   106 {

   107     OWFpixel*            ptr;

   108     OWFint               count;

   110     DPRINT(("OWF_Image_NonLinearizeData"));

   112     OWF_ASSERT(image != NULL && image->data != NULL);

   113     OWF_ASSERT(image->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   115     if (!image->format.linear)

   116     {

   117         return;

   118     }

   120     ptr = (OWFpixel*) image->data;

   121     count = image->width * image->height;

   123     while (count > 0)

   124     {

   125         ptr->color.red   = (OWFsubpixel) NonLinear(ptr->color.red /

   126                                OWF_RED_MAX_VALUE) * OWF_RED_MAX_VALUE;

   127         ptr->color.green = (OWFsubpixel) NonLinear(ptr->color.green /

   128                                OWF_GREEN_MAX_VALUE) * OWF_GREEN_MAX_VALUE;

   129         ptr->color.blue  = (OWFsubpixel) NonLinear(ptr->color.blue /

   130                                OWF_BLUE_MAX_VALUE) * OWF_BLUE_MAX_VALUE;

   132         --count;

   133         ptr++;

   134     }

   136     image->format.linear = OWF_FALSE;

   137 }

   139 /*----------------------------------------------------------------------------*/

   140 OWF_API_CALL void

   141 OWF_Image_LinearizeData(OWF_IMAGE* image)

   142 {

   143     OWFpixel*               ptr;

   144     OWFuint                 count;

   146     DPRINT(("OWF_Image_LinearizeData"));

   148     OWF_ASSERT(image != NULL && image->data != NULL);

   149     OWF_ASSERT(image->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   151     if (image->format.linear)

   152     {

   153         return;

   154     }

   156     ptr = (OWFpixel*) image->data;

   157     count = image->width * image->height;

   159     while (count > 0)

   160     {

   161         ptr->color.red   = (OWFsubpixel) Linear(ptr->color.red /

   162                                OWF_RED_MAX_VALUE) * OWF_RED_MAX_VALUE;

   163         ptr->color.green = (OWFsubpixel) Linear(ptr->color.green /

   164                                OWF_GREEN_MAX_VALUE) * OWF_GREEN_MAX_VALUE;

   165         ptr->color.blue  = (OWFsubpixel) Linear(ptr->color.blue /

   166                                OWF_BLUE_MAX_VALUE) * OWF_BLUE_MAX_VALUE;

   168         --count;

   169         ptr += image->pixelSize;

   170     }

   172     image->format.linear = OWF_TRUE;

   174 }

   176 /*----------------------------------------------------------------------------*/

   177 #define GAMMA(color, max, gamma) (max * pow(color/max, gamma))

   179 OWF_API_CALL void

   180 OWF_Image_Gamma(OWF_IMAGE* image, OWFfloat gamma)

   181 {

   182     OWFpixel*            ptr;

   183     OWFint               count;

   185     DPRINT(("OWF_Image_Gamma"));

   187     OWF_ASSERT(image != NULL && image->data != NULL);

   188     OWF_ASSERT(image->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   190     if (gamma == 1.0f)

   191     {

   192         return;

   193     }

   195     ptr = (OWFpixel*) image->data;

   196     count = image->width * image->height;

   198     while (count > 0)

   199     {

   200         ptr->color.red   =

   201             (OWFsubpixel) GAMMA(ptr->color.red, OWF_RED_MAX_VALUE, gamma);

   202         ptr->color.green =

   203             (OWFsubpixel) GAMMA(ptr->color.green, OWF_GREEN_MAX_VALUE, gamma);

   204         ptr->color.blue  =

   205             (OWFsubpixel) GAMMA(ptr->color.blue, OWF_BLUE_MAX_VALUE, gamma);

   207         --count;

   208         ptr++;

   209     }

   210 }

   212 /*----------------------------------------------------------------------------*/

   213 OWF_API_CALL void

   214 OWF_Image_EdgeReplication(OWF_IMAGE* image)

   215 {

   216     OWFint          y;

   217     OWFint          copyStride;

   218     OWFuint8*       srcPtr      = NULL;

   219     OWFuint8*       dstPtr      = NULL;

   221     DPRINT(("OWF_Image_EdgeReplication"));

   223     OWF_ASSERT(image);

   224     OWF_ASSERT(image->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   225     OWF_ASSERT(image->width >= 3 && image->height >= 3);

   227     copyStride = OWF_Image_GetStride(image->width, &image->format, 0);

   229     /* top side replication */

   230     srcPtr = (OWFuint8*) image->data;

   231     srcPtr += 1 * image->stride + 0 * image->pixelSize;

   232     dstPtr = (OWFuint8*) image->data;

   234     memcpy(dstPtr, srcPtr, copyStride);

   236     /* bottom side replication */

   237     srcPtr = (OWFuint8*) image->data;

   238     srcPtr += (image->height-2) * image->stride + 0 * image->pixelSize;

   239     dstPtr = (OWFuint8*) image->data;

   240     dstPtr += (image->height-1) * image->stride + 0 * image->pixelSize;

   242     memcpy(dstPtr, srcPtr, copyStride);

   244     /* left side replication */

   245     for (y = 0; y < image->height; y++)

   246     {

   247         OWF_Image_SetPixel(image, 0, y, OWF_Image_GetPixelPtr(image, 1, y));

   248     }

   250     /* right side replication */

   251     for (y = 0; y < image->height; y++)

   252     {

   253         OWF_Image_SetPixel(image, image->width-1, y, OWF_Image_GetPixelPtr(image,

   254                                                               image->width-2,

   255                                                               y));

   256     }

   258 }

   260 /*----------------------------------------------------------------------------*/

   261 OWF_API_CALL OWFboolean

   262 OWF_Image_SourceFormatConversion(OWF_IMAGE* dst, OWF_IMAGE* src)

   263 {

   264     OWFint      countY, widthDiff, heightDiff;

   265     void*       srcLinePtr;

   266     OWFpixel*   dstLinePtr;

   267     OWFboolean  replicateEdges = OWF_FALSE;

   268 #ifndef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

   269     OWFint      widthBytes;

   270 #endif

   272     DPRINT(("OWF_Image_SourceFormatConversion"));

   274     OWF_ASSERT(dst != 0 && dst->data != NULL);

   275     OWF_ASSERT(src != 0 && src->data != NULL);

   276     OWF_ASSERT(dst->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   277     OWF_ASSERT(dst->stride == OWF_Image_GetStride(dst->width, &dst->format, 0));

   279     srcLinePtr = src->data;

   280     dstLinePtr = (OWFpixel*) dst->data;

   282     /* dst image must either be the same size as the src image or 2 pixels

   283        bigger (enough space to perform edge replication) */

   284     if (dst->width != src->width || dst->height != src->height)

   285     {

   286         widthDiff = dst->width - src->width;

   287         heightDiff = dst->height - src->height;

   289         if (widthDiff == 2 && heightDiff == 2)

   290         {

   291             replicateEdges = OWF_TRUE;

   292             /* start of the destination buffer should have a 1 pixel offset */

   293             dstLinePtr = (OWFpixel*) dst->data + 1 * dst->width + 1;

   294         }

   295         else

   296         {

   297             return OWF_FALSE;

   298         }

   299     }

   301     if (dst->format.pixelFormat != OWF_IMAGE_ARGB_INTERNAL)

   302     {

   303         return OWF_FALSE;

   304     }

   306 #ifndef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

   307     widthBytes = OWF_Image_GetStride(src->width, &src->format, 0);

   308 #endif

   310     for (countY = src->height; countY; countY--)

   311     {

   312         OWFint count = src->width;

   313         OWFpixel* dstPtr = dstLinePtr;

   315         switch (src->format.pixelFormat)

   316         {

   317             case OWF_IMAGE_ARGB8888:

   318             {

   319 #ifdef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

   320                 OWFuint32* srcPtr = (OWFuint32*) srcLinePtr;

   322                 while (count > 0)

   323                 {

   324                     dstPtr->color.alpha = (OWFsubpixel)

   325                         OWF_ALPHA_MAX_VALUE * ((*srcPtr & ARGB8888_ALPHA_MASK) >> ARGB8888_ALPHA_SHIFT) / OWF_BYTE_MAX_VALUE;

   326                     dstPtr->color.red   = (OWFsubpixel)

   327                         OWF_RED_MAX_VALUE * ((*srcPtr & ARGB8888_RED_MASK) >> ARGB8888_RED_SHIFT) / OWF_BYTE_MAX_VALUE;

   328                     dstPtr->color.green = (OWFsubpixel)

   329                         OWF_GREEN_MAX_VALUE * ((*srcPtr & ARGB8888_GREEN_MASK)>> ARGB8888_GREEN_SHIFT) / OWF_BYTE_MAX_VALUE;

   330                     dstPtr->color.blue  = (OWFsubpixel)

   331                         OWF_BLUE_MAX_VALUE * ((*srcPtr & ARGB8888_BLUE_MASK) >> ARGB8888_BLUE_SHIFT) / OWF_BYTE_MAX_VALUE;

   332                     dstPtr ++;

   333                     srcPtr ++;

   334                     count--;

   335                 }

   336 #else

   337                 memcpy(dstLinePtr, srcLinePtr, widthBytes);

   338 #endif

   339                 break;

   340             }

   342             case OWF_IMAGE_XRGB8888:

   343             {

   344                 OWFuint32* srcPtr = (OWFuint32*) srcLinePtr;

   346                 while (count > 0)

   347                 {

   348 #ifdef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

   349                     dstPtr->color.alpha = OWF_FULLY_OPAQUE;

   350                     dstPtr->color.red   = (OWFsubpixel)

   351                         OWF_RED_MAX_VALUE * ((*srcPtr & ARGB8888_RED_MASK) >> ARGB8888_RED_SHIFT) / OWF_BYTE_MAX_VALUE;

   352                     dstPtr->color.green = (OWFsubpixel)

   353                         OWF_GREEN_MAX_VALUE * ((*srcPtr & ARGB8888_GREEN_MASK) >> ARGB8888_GREEN_SHIFT) / OWF_BYTE_MAX_VALUE;

   354                     dstPtr->color.blue  = (OWFsubpixel)

   355                         OWF_BLUE_MAX_VALUE * ((*srcPtr & ARGB8888_BLUE_MASK) >> ARGB8888_BLUE_SHIFT) / OWF_BYTE_MAX_VALUE;

   356 #else

   357                     *(OWFuint32*)dstPtr = *srcPtr | ARGB8888_ALPHA_MASK;

   358 #endif

   359                     dstPtr ++;

   360                     srcPtr ++;

   361                     count--;

   362                 }

   363                 break;

   364             }

   366             case OWF_IMAGE_RGB565:

   367             {

   368                 OWFfloat tmp;

   369                 OWFuint16* srcPtr = (OWFuint16*) srcLinePtr;

   371                 while (count > 0)

   372                 {

   373                     /*

   374                      * Formula for converting channel value is:

   375                      * Each channel is multiplied by (2^d - 1)/(2^s -1)

   376                      * where d is dest channel bits and s is source channel bits.

   377                      */

   378                     dstPtr->color.alpha = (OWFsubpixel) OWF_FULLY_OPAQUE;

   380                     tmp = (OWFfloat)((*srcPtr & RGB565_RED_MASK) >> RGB565_RED_SHIFT);

   381                     dstPtr->color.red   = (OWFsubpixel)OWF_RED_MAX_VALUE * tmp / 31.0f + OWF_SOURCE_CONVERSION_ROUNDING_VALUE;

   383                     tmp = (OWFfloat)((*srcPtr & RGB565_GREEN_MASK) >> RGB565_GREEN_SHIFT);

   384                     dstPtr->color.green = (OWFsubpixel)OWF_GREEN_MAX_VALUE * tmp / 63.0f + OWF_SOURCE_CONVERSION_ROUNDING_VALUE;

   386                     tmp = (OWFfloat)(*srcPtr & RGB565_BLUE_MASK);

   387                     dstPtr->color.blue  = (OWFsubpixel)OWF_BLUE_MAX_VALUE * tmp / 31.0f + OWF_SOURCE_CONVERSION_ROUNDING_VALUE;

   389                     dstPtr ++;

   390                     srcPtr ++;

   391                     count--;

   392                 }

   393                 break;

   394             }

   396             default:

   397             {

   398                 return OWF_FALSE; /* source format not supported */

   399             }

   400         }

   402         dstLinePtr+=dst->width;

   403         srcLinePtr=(OWFuint8*)srcLinePtr+src->stride;

   404     }

   406     if (replicateEdges)

   407     {

   408         OWF_Image_EdgeReplication(dst);

   409     }

   411     return OWF_TRUE;

   412 }

   414 /*----------------------------------------------------------------------------*/

   415 OWF_PUBLIC OWFint

   416 OWF_Image_GetStride(OWFint width, const OWF_IMAGE_FORMAT* format, OWFint minimumStride)

   417 {

   418     OWFint                  size;

   419     OWFint                  pixelSize;

   421     DPRINT(("OWF_Image_GetStride"));

   423     OWF_ASSERT(format);

   425     pixelSize = OWF_Image_GetFormatPixelSize(format->pixelFormat);

   427     if (pixelSize < 0)

   428     {

   429         /* negative pixelSize means that pixel size is a fraction

   430          * (1/-pixelSize) of a byte, e.g. -8 means pixel has size

   431          * of one bit. */

   433         size = (width + 1) / -pixelSize;

   434     }

   435     else

   436     {

   437         size = width * pixelSize;

   438     }

   439     if (size<minimumStride)

   440     {

   441         size=minimumStride;

   442     }

   443     if (format->rowPadding)

   444     {

   445         size += format->rowPadding - 1;

   446         size -= size % format->rowPadding;

   447     }

   448     return size;

   449 }

   451 /*----------------------------------------------------------------------------*/

   452 OWF_API_CALL OWFboolean

   453 OWF_Image_IsValidDestinationFormat(OWF_IMAGE_FORMAT* format)

   454 {

   455     DPRINT(("OWF_Image_IsValidDestinationFormat"));

   457     switch (format->pixelFormat)

   458     {

   459         case OWF_IMAGE_ARGB8888:

   460         {

   461             return OWF_TRUE;

   462         }

   463         case OWF_IMAGE_XRGB8888:

   464         {

   465             return OWF_TRUE;

   466         }

   467 #ifdef SUPPORT_565_OUTPUT

   468         case OWF_IMAGE_RGB565:

   469         {

   470             return OWF_TRUE;

   471         }

   472 #endif

   473         default:

   474         {

   475             return OWF_FALSE; /* destination format not supported */

   476         }

   477     }

   478 }

   480 /*----------------------------------------------------------------------------*/

   481 OWF_API_CALL OWFboolean

   482 OWF_Image_DestinationFormatConversion(OWF_IMAGE* dst, OWF_IMAGE* src)

   483 {

   484     OWFint                  countY;

   485     OWFuint32*              dstPtr;

   486     OWFpixel*               srcPtr;

   487 #ifndef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

   488     OWFint                  widthBytes;

   489 #endif

   491     DPRINT(("OWF_Image_DestinationFormatConversion"));

   493     OWF_ASSERT(dst != 0 && dst->data != NULL);

   494     OWF_ASSERT(src != 0 && src->data != NULL);

   495     OWF_ASSERT(src->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   496     /* Note: src->stride cannot be relied upon to be correct. Assume lines are contiguous. */

   498     if (src->format.pixelFormat != OWF_IMAGE_ARGB_INTERNAL)

   499     {

   500         return OWF_FALSE;

   501     }

   503     /* src and data must have equal amount of pixels */

   504     if (dst->width != src->width || dst->height != src->height)

   505     {

   506         return OWF_FALSE;

   507     }

   509     dstPtr = (OWFuint32*) dst->data;

   510     srcPtr = (OWFpixel*) src->data;

   512     if (dst->format.premultiplied && !src->format.premultiplied)

   513     {

   514         OWF_Image_PremultiplyAlpha(src);

   515     }

   516     else if (!dst->format.premultiplied && src->format.premultiplied)

   517     {

   518         OWF_Image_UnpremultiplyAlpha(src);

   519     }

   521 #ifndef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

   522     widthBytes = OWF_Image_GetStride(src->width, &src->format, 0);

   523 #endif

   525     for (countY = 0; countY < src->height; countY++)

   526     {

   527         OWFuint8* destination = (OWFuint8*) dst->data;

   528         destination += countY*dst->stride;

   529         dstPtr = (OWFuint32*) destination;

   531         switch (dst->format.pixelFormat)

   532         {

   533             case OWF_IMAGE_ARGB8888:

   534             {

   535 #ifdef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

   536                 OWFint countX;

   537                 OWFuint32 dstPixel = 0;

   539                 for (countX = 0; countX < src->width; countX++)

   540                 {

   541                     dstPixel  = ((OWFuint8)(roundSubPixel(OWF_BYTE_MAX_VALUE * srcPtr->color.alpha / OWF_ALPHA_MAX_VALUE)) <<

   542                                 ARGB8888_ALPHA_SHIFT);

   543                     dstPixel |= ((OWFuint8)(roundSubPixel(OWF_BYTE_MAX_VALUE * srcPtr->color.red / OWF_RED_MAX_VALUE))   <<

   544                                 ARGB8888_RED_SHIFT);

   545                     dstPixel |= ((OWFuint8)(roundSubPixel(OWF_BYTE_MAX_VALUE * srcPtr->color.green / OWF_GREEN_MAX_VALUE)) <<

   546                                 ARGB8888_GREEN_SHIFT);

   547                     dstPixel |= ((OWFuint8)(roundSubPixel(OWF_BYTE_MAX_VALUE * srcPtr->color.blue / OWF_BLUE_MAX_VALUE))  <<

   548                                 ARGB8888_BLUE_SHIFT);

   549                     *dstPtr = dstPixel;

   550                     dstPtr ++;

   551                     srcPtr ++;

   552                 }

   553 #else

   554                 memcpy(dstPtr, srcPtr, widthBytes);

   555                 srcPtr = (OWFpixel*)((OWFuint8*)srcPtr + widthBytes);

   556 #endif

   557                 break;

   558             }

   560             case OWF_IMAGE_XRGB8888:

   561             {

   562                 OWFint countX;

   563                 OWFuint32 dstPixel = 0;

   565                 for (countX = 0; countX < src->width; countX++)

   566                 {

   567 #ifdef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

   568                     dstPixel  = ARGB8888_ALPHA_MASK;

   569                     dstPixel |= ((OWFuint8)(roundSubPixel(OWF_BYTE_MAX_VALUE * srcPtr->color.red / OWF_RED_MAX_VALUE))   <<

   570                                 ARGB8888_RED_SHIFT);

   571                     dstPixel |= ((OWFuint8)(roundSubPixel(OWF_BYTE_MAX_VALUE * srcPtr->color.green / OWF_GREEN_MAX_VALUE)) <<

   572                                 ARGB8888_GREEN_SHIFT);

   573                     dstPixel |= ((OWFuint8)(roundSubPixel(OWF_BYTE_MAX_VALUE * srcPtr->color.blue / OWF_BLUE_MAX_VALUE))  <<

   574                                 ARGB8888_BLUE_SHIFT);

   575 #else

   576                     dstPixel = *(OWFuint32*)srcPtr | ARGB8888_ALPHA_MASK;

   577 #endif

   578                     *dstPtr = dstPixel;

   579                     dstPtr ++;

   580                     srcPtr ++;

   581                 }

   582                 break;

   583             }

   585             default:

   586             {

   587                 return OWF_FALSE; /* destination format not supported */

   588             }

   589         }

   590     }

   592     return OWF_TRUE;

   593 }

   595 /*----------------------------------------------------------------------------*/

   596 OWF_API_CALL void

   597 OWF_Image_Init(OWF_IMAGE* image)

   598 {

   599     DPRINT(("OWF_Image_Init"));

   601     OWF_ASSERT(NULL != image);

   602     memset(image, 0, sizeof(OWF_IMAGE));

   603 }

   605 /*----------------------------------------------------------------------------*/

   606 OWF_PUBLIC OWF_IMAGE*

   607 OWF_Image_Create(OWFint width,

   608                  OWFint height,

   609                  const OWF_IMAGE_FORMAT* format,

   610                  void* buffer,

   611                  OWFint minimumStride

   612                  )

   613 {

   614     OWF_IMAGE*      image;

   616     DPRINT(("OWF_Image_Create"));

   618     image = CREATE(OWF_IMAGE);

   620     if (image)

   621     {

   623         image->format.pixelFormat   = format->pixelFormat;

   624         image->format.linear        = format->linear;

   625         image->format.premultiplied = format->premultiplied;

   626         image->format.rowPadding    = format->rowPadding;

   628         image->pixelSize    = OWF_Image_GetFormatPixelSize(format->pixelFormat);

   629         image->width        = width;

   630         image->height       = height;

   632         /* stride is row length in bytes (aligned according to image format) */

   633         image->stride = OWF_Image_GetStride(width, &image->format, minimumStride);

   634         image->foreign  = (buffer) ? OWF_TRUE : OWF_FALSE;

   635         image->dataMax = image->stride * height;

   637         DPRINT(("OWF_Image_Create:"));

   638         DPRINT(("  Pixel format     = %x", format->pixelFormat));

   639         DPRINT(("  Linear           = %d", format->linear));

   640         DPRINT(("  Premultiplied    = %d", format->premultiplied));

   641         DPRINT(("  Row alignment    = %d bytes", format->rowPadding));

   642         DPRINT(("  Pixel size       = %d", image->pixelSize));

   643         DPRINT(("  Width            = %d", image->width));

   644         DPRINT(("  Height           = %d", image->height));

   645         DPRINT(("  Stride           = %d", image->stride));

   646         DPRINT(("  Foreign data     = %d", image->foreign));

   647         DPRINT(("  Data size        = %d", image->dataMax));

   648         if (image->dataMax > 0)

   649         {

   650             image->data = (image->foreign) ? (buffer) :

   651                 OWF_Image_AllocData(0, width, height, format->pixelFormat);

   652         }

   653         else

   654         {

   655             /* either overflow occured or width/height is zero */

   656             if (width && height)

   657             {

   658                 DPRINT(("OWF_Image_Create: Overflow in image size calculation."));

   659             }

   660             else

   661             {

   662                 DPRINT(("OWF_Image_Create: width or height is zero."));

   663             }

   664         }

   665     }

   667     if (!(image && image->data && (image->dataMax > 0)))

   668     {

   669         DPRINT(("OWF_Image_Create: Image creation failed (image = %p, "

   670                 "data = %p, dataSize = %d)",

   671                 image, image ? (void*)(image->data) : (void*)NULL, image?image->dataMax:-1));

   672         DESTROY(image);

   673         return NULL;

   674     }

   675     return image;

   676 }

   678 /*----------------------------------------------------------------------------*/

   679 OWF_PUBLIC void OWF_Image_Destroy(OWF_IMAGE* image)

   680 {

   681     if (image)

   682         {

   683         DESTROY(image);

   684         }

   685 }

   688 /*----------------------------------------------------------------------------*/

   689 OWF_API_CALL OWF_IMAGE*

   690 OWF_Image_Copy(const OWF_IMAGE* image)

   691 {

   692     OWF_IMAGE* newImage = NULL;

   694     DPRINT(("OWF_Image_Copy"));

   696     OWF_ASSERT(image);

   698     newImage = CREATE(OWF_IMAGE);

   699     if (newImage)

   700     {

   701         memcpy(newImage, image, sizeof(*newImage));

   702         if (!image->foreign)

   703         {

   704             newImage->data = xalloc(1, image->dataMax);

   705             if (newImage->data)

   706             {

   707                 memcpy(newImage->data,

   708                        image->data,

   709                        image->height*image->stride);

   710             }

   711         }

   712     }

   714     return newImage;

   715 }

   717 /*----------------------------------------------------------------------------*/

   718 OWF_API_CALL OWFboolean

   719 OWF_Image_SetSize(OWF_IMAGE* image,

   720                   OWFint width,

   721                   OWFint height)

   722 {

   723     OWFint                  size;

   724     OWFint                  stride;

   726     DPRINT(("OWF_Image_SetSize"));

   728     OWF_ASSERT(image);

   729     OWF_ASSERT(image->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL ||

   730             image->format.pixelFormat==OWF_IMAGE_L32);

   732     /** note that this setsize ignores any specialised stride **/

   733     stride = OWF_Image_GetStride(width, &image->format, 0);

   734     size = height * stride;

   736     /* change source size if buffer have enough space */

   737     if (size > 0 && size <= image->dataMax)

   738     {

   739         image->height = height;

   740         image->width  = width;

   741         image->stride = stride;

   742         return OWF_TRUE;

   743     }

   744     return OWF_FALSE;

   745 }

   746 /*----------------------------------------------------------------------------*/

   747 OWF_API_CALL void

   748 OWF_Image_SetFlags(OWF_IMAGE* image,

   749                   OWFboolean premultiply,

   750                   OWFboolean linear)

   751     {

   752     DPRINT(("OWF_Image_SetFlags"));

   754     OWF_ASSERT(image);

   755     OWF_ASSERT(image->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL ||

   756             image->format.pixelFormat==OWF_IMAGE_L32);

   757     image->format.linear=linear;

   758     image->format.premultiplied=premultiply;

   759     }

   761 /*----------------------------------------------------------------------------*/

   762 OWF_API_CALL void

   763 OWF_Image_SetPixelBuffer(OWF_IMAGE* image,      void* buffer)

   764     {

   765     DPRINT(("OWF_Image_SetPixelBuffer"));

   767     OWF_ASSERT(image);

   768     OWF_ASSERT(buffer);

   769     OWF_ASSERT(image->foreign);

   770     if (image->foreign)

   771         {

   772         image->data=buffer;

   773         }

   774     }

   775 /*----------------------------------------------------------------------------*/

   776 /* NEVER USED

   777 OWF_API_CALL OWFboolean

   778 OWF_Image_SetPixelData(OWF_IMAGE* image,

   779                        OWFint width,

   780                        OWFint height,

   781                        const OWF_IMAGE_FORMAT* format,

   782                        void* buffer)

   783 {

   784     OWFint                  size = 0,

   785                             stride = 0;

   787     OWF_ASSERT(image && format);

   789     stride  = OWF_Image_GetStride(width, format);

   790     size    = height * stride;

   792     if (size <= 0)

   793     {

   794         return OWF_FALSE;

   795     }

   797     if (!image->foreign)

   798     {

   799         OWF_Image_FreeData(0, &image->data);

   800     }

   802     image->format.pixelFormat   = format->pixelFormat;

   803     image->format.linear        = format->linear;

   804     image->format.premultiplied = format->premultiplied;

   805     image->format.rowPadding    = format->rowPadding;

   807     image->pixelSize    = OWF_Image_GetFormatPixelSize(format->pixelFormat);

   808     image->width        = width;

   809     image->height       = height;

   810     image->stride       = stride;

   811     image->foreign      = OWF_TRUE;

   812     image->dataMax      = size;

   813     image->data         = buffer;

   815     return OWF_TRUE;

   816 }

   817 */

   818 /*----------------------------------------------------------------------------*/

   819 OWF_API_CALL OWFboolean

   820 OWF_Image_Blit(OWF_IMAGE* dst,

   821                OWF_RECTANGLE const* dstRect,

   822                OWF_IMAGE const* src,

   823                OWF_RECTANGLE const* srcRect)

   824 {

   825     OWF_RECTANGLE           bounds, rect, drect, srect;

   826     OWFint                  lineCount   = 0;

   827     OWFint                  copyStride  = 0;

   828     OWFuint8*               srcPtr      = NULL;

   829     OWFuint8*               dstPtr      = NULL;

   831     DPRINT(("OWF_Image_Blit"));

   833     OWF_ASSERT(dst != 0 && dst->data != NULL);

   834     OWF_ASSERT(src != 0 && src->data != NULL);

   835     OWF_ASSERT(dst->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   836     OWF_ASSERT(src->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   838     OWF_Rect_Set(&bounds, 0, 0, dst->width, dst->height);

   839     OWF_Rect_Set(&rect,

   840                  dstRect->x, dstRect->y,

   841                  srcRect->width, srcRect->height);

   842     OWF_Rect_Set(&srect,

   843                  srcRect->x, srcRect->y,

   844                  srcRect->width, srcRect->height);

   846     /* clip destination rectangle against bounds */

   847     if (!OWF_Rect_Clip(&drect, &rect, &bounds))

   848     {

   849         return OWF_FALSE;

   850     }

   852     if (src->pixelSize != dst->pixelSize)

   853     {

   854         DPRINT(("OWF_Image_Blit(): pixels sizes differ\n"));

   855         return OWF_FALSE;

   856     }

   858     lineCount = srect.height;

   859     copyStride = srect.width * src->pixelSize;

   861     /* use bytepointers in copy  - generic */

   862     srcPtr = (OWFuint8*) src->data;

   863     srcPtr += srect.y * src->stride + srect.x * src->pixelSize;

   864     dstPtr = (OWFuint8*)dst->data;

   865     dstPtr += drect.y * dst->stride + drect.x * src->pixelSize;

   867     while (lineCount > 0)

   868     {

   869         --lineCount;

   871         memcpy(dstPtr, srcPtr, copyStride);

   873         srcPtr += src->stride;

   874         dstPtr += dst->stride;

   875     }

   877     return OWF_TRUE;

   878 }

   880 /*----------------------------------------------------------------------------*/

   881 OWF_API_CALL OWFpixel*

   882 OWF_Image_GetPixelPtr(OWF_IMAGE* image,

   883                       OWFint x,

   884                       OWFint y)

   885 {

   886     OWF_ASSERT(image && image->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   887     if (!(image && image->data))

   888     {

   889         return 0;

   890     }

   892     x = CLAMP(x, 0, image->width-1);

   893     y = CLAMP(y, 0, image->height-1);

   895     return (OWFpixel*)image->data + y * image->width  + x ;

   896 }

   898 /*----------------------------------------------------------------------------*/

   899 OWF_API_CALL void

   900 OWF_Image_GetPixel(OWF_IMAGE* image,

   901                    OWFint x,

   902                    OWFint y,

   903                    OWFpixel* pixel)

   904 {

   905     OWFpixel*               temp = NULL;

   907     OWF_ASSERT(pixel);

   909     if (!(image && image->data))

   910     {

   911         return;

   912     }

   913     OWF_ASSERT(image->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   915     pixel->color.alpha = 0;

   916     pixel->color.red = 0;

   917     pixel->color.green = 0;

   918     pixel->color.blue = 0;

   920     if (x < 0 || y < 0 || x >= image->width || y >= image->height)

   921     {

   922         return;

   923     }

   925     temp = (OWFpixel*)image->data + y * image->width  + x;

   927     pixel->color.alpha = temp->color.alpha;

   928     pixel->color.red = temp->color.red;

   929     pixel->color.green = temp->color.green;

   930     pixel->color.blue = temp->color.blue;

   931 }

   933 /*----------------------------------------------------------------------------*/

   934 OWF_API_CALL void

   935 OWF_Image_SetPixel(OWF_IMAGE* image,

   936                    OWFint x,

   937                    OWFint y,

   938                    OWFpixel const* pixel)

   939 {

   940     OWFpixel*               data = NULL;

   942     if (!(image && image->data))

   943     {

   944         return;

   945     }

   946     OWF_ASSERT(image->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   948     if(x < 0 || y < 0 || x >= image->width || y >= image->height)

   949     {

   950         return;

   951     }

   954     data = (OWFpixel*)image->data + y * image->width + x;

   956     data->color.red = pixel->color.red;

   957     data->color.green = pixel->color.green;

   958     data->color.blue = pixel->color.blue;

   959     data->color.alpha = pixel->color.alpha;

   960 }

   962 /*----------------------------------------------------------------------------*/

   963 OWF_API_CALL OWFboolean

   964 OWF_Image_PointSamplingStretchBlit(OWF_IMAGE* dst,

   965                                    OWF_RECTANGLE* dstRect,

   966                                    OWF_IMAGE* src,

   967                                    OWFfloat* srcRect)

   968 {

   969     OWFint                  ox = 0, oy = 0;

   970     OWFint                  x, y;

   972     DPRINT(("OWF_Image_PointSamplingStretchBlit"));

   974     /* images must be valid */

   975     if (!((src != NULL) && (src->data != NULL) &&

   976           (dst != NULL) && (dst->data != NULL)))

   977     {

   978         return OWF_FALSE;

   979     }

   980     OWF_ASSERT(src->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   981     OWF_ASSERT(dst->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

   983     /* ditto with rectangles, too */

   984     if (!((dstRect != NULL) && (dstRect->width && dstRect->height) &&

   985           (srcRect != NULL) && (srcRect[2] && srcRect[3])))

   986     {

   987         return OWF_FALSE;

   988     }

   990     /* Note: bounds check missing */

   992     if (src->pixelSize != dst->pixelSize)

   993     {

   994         return OWF_FALSE;

   995     }

   997 #ifdef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

   998     {

   999         OWFfloat                dx = 0.f, dy = 0.f;

  1001         /* solve scaling ratios for image */

  1002         dx = (OWFfloat) srcRect[2] / (OWFfloat) dstRect->width;

  1003         dy = (OWFfloat) srcRect[3] / (OWFfloat) dstRect->height;

  1005         for (y = 0; y < dstRect->height; y++)

  1006         {

  1007             for (x = 0; x < dstRect->width; x++)

  1008             {

  1009                 OWFpixel*       pixel;

  1011                 /* NOTE This code uses pixel center points to calculate distances

  1012                         and factors. Results can differ slightly when pixel corner

  1013                         coordinates are used */

  1015                 /* coordinates of nearest pixel in original image */

  1016                 ox = (int) floor((((OWFfloat) x + 0.5) * dx) + srcRect[0]);

  1017                 oy = (int) floor((((OWFfloat) y + 0.5) * dy) + srcRect[1]);

  1019                 pixel = OWF_Image_GetPixelPtr(src,

  1020                                               ox,

  1021                                               oy);

  1023                 OWF_Image_SetPixel(dst,

  1024                                    dstRect->x + x,

  1025                                    dstRect->y + y,

  1026                                    pixel);

  1028             }

  1029         }

  1030     }

  1031 #else

  1032     if (srcRect[0] < 0 || (srcRect[0] + srcRect[2]) > src->width ||

  1033             srcRect[1] < 0 || (srcRect[1] + srcRect[3]) > src->height)

  1034         {

  1035         /* Source rectangle out of bounds */

  1036         return OWF_FALSE;

  1037         }

  1039     if (dstRect->x < 0 || (dstRect->x + dstRect->width) > dst->width ||

  1040             dstRect->y < 0 || (dstRect->y + dstRect->height) > dst->height)

  1041         {

  1042         /* Destination rectangle out of bounds */

  1043         return OWF_FALSE;

  1044         }

  1046     {

  1047         OWFint dxFix, dyFix;

  1048         OWFint xFixStart, yFix;

  1049         OWFuint32 *dstPtr, *srcLinePtr;

  1051 /* Integer <-> 16.16 fixed point conversion macros */

  1052 #define INT_TO_FIXED_PT(X) ((X) << 16)

  1053 #define FIXED_PT_TO_INT(X) ((X) >> 16)

  1055         /* Calculate scaling factors in fixed point (with rounding). */

  1056         dxFix = (OWFint)((srcRect[2] * INT_TO_FIXED_PT(1) + (dstRect->width >> 1)) / dstRect->width);

  1057         dyFix = (OWFint)((srcRect[3] * INT_TO_FIXED_PT(1) + (dstRect->height >> 1)) / dstRect->height);

  1059         /* Calculate fixed point location in source, with half-pixel offset */

  1060         xFixStart = (OWFint)(srcRect[0] * INT_TO_FIXED_PT(1) + (dxFix >> 1));

  1061         yFix = (OWFint)(srcRect[1] * INT_TO_FIXED_PT(1) + (dyFix >> 1));

  1063         /* Initial target address. */

  1064         dstPtr = (OWFuint32*)dst->data + dstRect->y * dst->width + dstRect->x;

  1066         for (y = 0; y < dstRect->height; y++)

  1067         {

  1068             OWFint xFix = xFixStart;

  1070             oy = FIXED_PT_TO_INT(yFix);

  1071             srcLinePtr = (OWFuint32*)src->data + oy * src->width;

  1073             for (x = 0; x < dstRect->width; x++)

  1074             {

  1075                 ox = FIXED_PT_TO_INT(xFix);

  1076                 dstPtr[x] = srcLinePtr[ox];

  1077                 xFix += dxFix;

  1078             }

  1080             dstPtr += dst->width;

  1081             yFix += dyFix;

  1082         }

  1083     }

  1084 #endif

  1085     return OWF_TRUE;

  1086 }

  1088 /*----------------------------------------------------------------------------*/

  1089 OWF_API_CALL OWFboolean

  1090 OWF_Image_BilinearStretchBlit(OWF_IMAGE* dst,

  1091                               OWF_RECTANGLE* dstRect,

  1092                               OWF_IMAGE* src,

  1093                               OWFfloat* srcRect)

  1094 {

  1095     OWFint                  x = 0, y = 0;

  1096     OWFint                  ox = 0, oy = 0;

  1097     OWFfloat                dx = 0.f, dy = 0.f, wx = 0.f, wy = 0.f;

  1098     OWFfloat                w[2 * 2];

  1099     OWFpixel*               sample[4];

  1100     OWFpixel*               pixel = NULL;

  1102     DPRINT(("OWF_Image_BilinearStretchBlit"));

  1104     /* images must be valid */

  1105     if (!((src != NULL) && (src->data != NULL) &&

  1106           (dst != NULL) && (dst->data != NULL)))

  1107     {

  1108         return OWF_FALSE;

  1109     }

  1110     OWF_ASSERT(src->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

  1111     OWF_ASSERT(dst->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

  1113     /* ditto with rectangles, too */

  1114     if (!((dstRect != NULL) && (dstRect->width && dstRect->height) &&

  1115           (srcRect != NULL) && (srcRect[2] && srcRect[3])))

  1116     {

  1117         return OWF_FALSE;

  1118     }

  1120     if (src->pixelSize != dst->pixelSize)

  1121     {

  1122         return OWF_FALSE;

  1123     }

  1125     /* solve scaling ratios for image */

  1126     dx = (OWFfloat) srcRect[2] / (OWFfloat) dstRect->width;

  1127     dy = (OWFfloat) srcRect[3] / (OWFfloat) dstRect->height;

  1129     for (y = 0; y < dstRect->height; y++)

  1130     {

  1131         for (x = 0; x < dstRect->width; x++)

  1132         {

  1133             OWFfloat tempOx, tempOy;

  1135             /* NOTE This code uses pixel center points to calculate distances

  1136                     and factors. Results can differ slightly when pixel corner

  1137                     coordinates are used */

  1139             /* coordinates of nearest pixel in original image */

  1140             tempOx = (((OWFfloat) x + 0.5) * dx) + srcRect[0];

  1141             tempOy = (((OWFfloat) y + 0.5) * dy) + srcRect[1];

  1143             ox = (int) floor((((OWFfloat) x + 0.5) * dx) + srcRect[0]);

  1144             oy = (int) floor((((OWFfloat) y + 0.5) * dy) + srcRect[1]);

  1146             /* Distances to nearest pixel, eg. fractional part of coordinate */

  1147             wx = (OWFfloat) ox + 0.5 - tempOx;

  1148             wy = (OWFfloat) oy + 0.5 - tempOy;

  1150             /* If distance is positive, we should use left or upper pixel for

  1151              * second nearest pixel. */

  1152             if (wx > 0.0)

  1153             {

  1154                 ox--;

  1155                 wx = 1.0 - wx;

  1156             }

  1157             else

  1158             {

  1159                 wx = -wx; /* abs */

  1160             }

  1162             if (wy > 0.0)

  1163             {

  1164                 oy--;

  1165                 wy = 1.0 - wy;

  1166             }

  1167             else

  1168             {

  1169                 wy = -wy;

  1170             }

  1172             /* Calculate weights for samples */

  1173             w[0] = (1.0 - wx) * (1.0 - wy);

  1174             w[1] = wx * (1.0 - wy);

  1175             w[2] = (1.0 - wx) * wy;

  1176             w[3] = wx * wy;

  1178             /* get sample */

  1179             sample[0] = OWF_Image_GetPixelPtr(src, ox + 0, oy + 0);

  1180             sample[1] = OWF_Image_GetPixelPtr(src, ox + 1, oy + 0);

  1181             sample[2] = OWF_Image_GetPixelPtr(src, ox + 0, oy + 1);

  1182             sample[3] = OWF_Image_GetPixelPtr(src, ox + 1, oy + 1);

  1185             /* get result pixel */

  1186             pixel = OWF_Image_GetPixelPtr(dst, x, y);

  1188             /* calculate final color */

  1189             pixel->color.red   =

  1190                 sample[0]->color.red * w[0] + sample[1]->color.red * w[1] +

  1191                 sample[2]->color.red * w[2] + sample[3]->color.red * w[3] + OWF_BILINEAR_ROUNDING_VALUE;

  1193             pixel->color.green =

  1194                 sample[0]->color.green * w[0] + sample[1]->color.green * w[1] +

  1195                 sample[2]->color.green * w[2] + sample[3]->color.green * w[3] + OWF_BILINEAR_ROUNDING_VALUE;

  1197             pixel->color.blue  =

  1198                 sample[0]->color.blue * w[0] + sample[1]->color.blue * w[1] +

  1199                 sample[2]->color.blue * w[2] + sample[3]->color.blue * w[3] + OWF_BILINEAR_ROUNDING_VALUE;

  1201             pixel->color.alpha =

  1202                 sample[0]->color.alpha * w[0] + sample[1]->color.alpha * w[1] +

  1203                 sample[2]->color.alpha * w[2] + sample[3]->color.alpha * w[3] + OWF_BILINEAR_ROUNDING_VALUE;

  1204         }

  1205     }

  1206     return OWF_TRUE;

  1208 }

  1210 /*----------------------------------------------------------------------------*/

  1211 OWF_API_CALL OWFboolean

  1212 OWF_Image_Stretch(OWF_IMAGE* dst,

  1213                   OWF_RECTANGLE* dstRect,

  1214                   OWF_IMAGE* src,

  1215                   OWFfloat* srcRect,

  1216                   OWF_FILTERING filter)

  1217 {

  1218     OWFboolean          result = OWF_FALSE;

  1220     switch (filter)

  1221     {

  1222         case OWF_FILTER_POINT_SAMPLING:

  1223         {

  1224             result = OWF_Image_PointSamplingStretchBlit(dst, dstRect, src,

  1225                                                         srcRect);

  1226             break;

  1227         }

  1228         case OWF_FILTER_BILINEAR:

  1229         {

  1230             result = OWF_Image_BilinearStretchBlit(dst, dstRect, src, srcRect);

  1231             break;

  1232         }

  1233     }

  1235     return result;

  1236 }

  1238 /*----------------------------------------------------------------------------*/

  1239 OWF_API_CALL void

  1240 OWF_Image_Clear(OWF_IMAGE* image,

  1241                 OWFsubpixel red,

  1242                 OWFsubpixel green,

  1243                 OWFsubpixel blue,

  1244                 OWFsubpixel alpha)

  1245 {

  1246     OWFint                  i, numPixels;

  1247     OWFpixel*                pixels;

  1249     DPRINT(("OWF_Image_Clear"));

  1251     OWF_ASSERT(image != 0);

  1252     OWF_ASSERT(image->data != 0);

  1253     OWF_ASSERT(image->format.pixelFormat == OWF_IMAGE_ARGB_INTERNAL);

  1254     /* Note: image->stride cannot be relied upon to be correct. Assume lines are contiguous. */

  1256     numPixels = image->width * image->height;

  1257     pixels = (OWFpixel*) image->data;

  1259 #ifdef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

  1260     for (i = 0; i < numPixels; i++)

  1261     {

  1262         pixels[i].color.red   = (OWFsubpixel) red;

  1263         pixels[i].color.green = (OWFsubpixel) green;

  1264         pixels[i].color.blue  = (OWFsubpixel) blue;

  1265         pixels[i].color.alpha = (OWFsubpixel) alpha;

  1266     }

  1267 #else

  1268     if (alpha == red && alpha == green && alpha == blue)

  1269         {

  1270         /* If all four bytes are the same, just use memset */

  1271         OWFuint32 clearBytes = numPixels * sizeof(OWFuint32);

  1273         memset(pixels, alpha, clearBytes);

  1274         }

  1275     else

  1276         {

  1277         /* Otherwise assign each pixel the packed value */

  1278         OWFuint32* pixelPtr = (OWFuint32*)pixels;

  1279         OWFuint32 pixel;

  1281         pixel = (alpha << ARGB8888_ALPHA_SHIFT) | (red << ARGB8888_RED_SHIFT) |

  1282                 (green << ARGB8888_GREEN_SHIFT) | (blue << ARGB8888_BLUE_SHIFT);

  1284         for (i = 0; i < numPixels; i++)

  1285             {

  1286             pixelPtr[i] = pixel;

  1287             }

  1288         }

  1289 #endif

  1290 }

  1292 /*----------------------------------------------------------------------------*/

  1293 OWF_API_CALL void

  1294 OWF_Image_PremultiplyAlpha(OWF_IMAGE* image)

  1295 {

  1296     OWFint       x, y;

  1298     DPRINT(("OWF_Image_PremultiplyAlpha"));

  1300     OWF_ASSERT(image != 0);

  1302     if (image->format.premultiplied)

  1303     {

  1304         return;

  1305     }

  1307     /* only for internal format */

  1308     if (image->format.pixelFormat != OWF_IMAGE_ARGB_INTERNAL)

  1309     {

  1310         return;

  1311     }

  1313     for (y = 0; y < image->height; y++)

  1314     {

  1315         for (x = 0; x < image->width; x++)

  1316         {

  1317             OWFpixel* pixel;

  1318             OWFsubpixel alpha;

  1320             pixel = OWF_Image_GetPixelPtr(image, x, y);

  1322             alpha = pixel->color.alpha;

  1324             if (0 == alpha)

  1325             {

  1326                 pixel->color.red =

  1327                 pixel->color.green =

  1328                 pixel->color.blue = 0;

  1329             }

  1330             else

  1331             {

  1332                 pixel->color.red    = (pixel->color.red * alpha + OWF_PREMUL_ROUNDING_FACTOR ) /

  1333                                       OWF_ALPHA_MAX_VALUE;

  1334                 pixel->color.green  = (pixel->color.green * alpha + OWF_PREMUL_ROUNDING_FACTOR ) /

  1335                                       OWF_ALPHA_MAX_VALUE;

  1336                 pixel->color.blue   = (pixel->color.blue * alpha + OWF_PREMUL_ROUNDING_FACTOR ) /

  1337                                       OWF_ALPHA_MAX_VALUE;

  1338             }

  1339         }

  1340     }

  1342     image->format.premultiplied = OWF_TRUE;

  1343 }

  1345 /*----------------------------------------------------------------------------*/

  1346 OWF_API_CALL void

  1347 OWF_Image_UnpremultiplyAlpha(OWF_IMAGE* image)

  1348 {

  1349     OWFint       count;

  1350     OWFpixel*    pixelPtr;

  1352     DPRINT(("OWF_Image_UnpremultiplyAlpha"));

  1354     OWF_ASSERT(image != 0);

  1356     if (!image->format.premultiplied)

  1357     {

  1358         return;

  1359     }

  1361     /* only for internal format */

  1362     if (image->format.pixelFormat != OWF_IMAGE_ARGB_INTERNAL)

  1363     {

  1364         return;

  1365     }

  1367     count = image->width * image->height;

  1368     pixelPtr = (OWFpixel*)image->data;

  1370     while (count > 0)

  1371     {

  1373         OWFsubpixel a = pixelPtr->color.alpha;

  1375         #ifdef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

  1376 			OWF_ASSERT(a <= OWF_ALPHA_MAX_VALUE && a >= OWF_ALPHA_MIN_VALUE);

  1377 		#endif

  1379         if (a > OWF_ALPHA_MIN_VALUE)

  1380         {

  1381             OWFsubpixel r = pixelPtr->color.red   * OWF_RED_MAX_VALUE / a;

  1382             OWFsubpixel g = pixelPtr->color.green * OWF_GREEN_MAX_VALUE / a;

  1383             OWFsubpixel b = pixelPtr->color.blue  * OWF_BLUE_MAX_VALUE / a;

  1385             pixelPtr->color.red   = r;

  1386             pixelPtr->color.green = g;

  1387             pixelPtr->color.blue  = b;

  1389             --count;

  1390             pixelPtr++;

  1391         }

  1392     }

  1394     image->format.premultiplied = OWF_TRUE;

  1395 }

  1397 /*----------------------------------------------------------------------------*/

  1398 OWF_API_CALL void

  1399 OWF_Image_Rotate(OWF_IMAGE* dst,

  1400                  OWF_IMAGE* src,

  1401                  OWF_ROTATION rotation)

  1402 {

  1403     OWFint                  ox = 0, oy = 0,

  1404                             w = 0, h = 0,

  1405                             x = 0, y = 0;

  1406     OWFint                  xx = 0, xy = 0,

  1407                             yx = 0, yy = 0;

  1409     DPRINT(("OWF_Image_Rotate"));

  1411     OWF_ASSERT(src && src->data);

  1412     OWF_ASSERT(dst && dst->data);

  1413     OWF_ASSERT(src->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

  1414     OWF_ASSERT(dst->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

  1416     w = src->width;

  1417     h = src->height;

  1419     switch (rotation)

  1420     {

  1421         case OWF_ROTATION_0:

  1422         {

  1423             /*

  1424              * origin: (0, 0)

  1425              * x-axis: (1, 0)

  1426              * y-axis: (0, 1)

  1427              */

  1428             ox = 0;

  1429             oy = 0;

  1430             xx = 1;

  1431             xy = 0;

  1432             yx = 0;

  1433             yy = 1;

  1434             break;

  1435         }

  1436         case OWF_ROTATION_90:

  1437         {

  1438             /*

  1439              * origin: (height-1, 0)

  1440              * x-axis: (0, 1)

  1441              * y-axis: (-1, 0)

  1442              */

  1443             ox = h - 1;

  1444             oy = 0;

  1445             xx = 0;

  1446             xy = 1;

  1447             yx = -1;

  1448             yy = 0;

  1449             break;

  1450         }

  1451         case OWF_ROTATION_180:

  1452         {

  1453             /*

  1454              * origin: (width-1, height-1)

  1455              * x-axis: (-1, 0)

  1456              * y-axis: (0, -1)

  1457              */

  1458             ox = w - 1;

  1459             oy = h - 1;

  1460             xx = -1;

  1461             xy = 0;

  1462             yx = 0;

  1463             yy = -1;

  1464             break;

  1465         }

  1466         case OWF_ROTATION_270:

  1467         {

  1468             /*

  1469              * origin: (0, height-1)

  1470              * x-axis: (0, -1)

  1471              * y-axis: (1, 0)

  1472              */

  1473             ox = 0;

  1474             oy = w - 1;

  1475             xx = 0;

  1476             xy = -1;

  1477             yx = 1;

  1478             yy = 0;

  1479             break;

  1481         }

  1482     }

  1484     for (y = 0; y < h; y++)

  1485     {

  1486         for (x = 0; x < w; x++)

  1487         {

  1488         /*

  1489          * O = [ox oy]' X = [xx xy]' Y = [yx yy]'

  1490          *

  1491          * p_dst(x_src,y_src) = O + x_src*X + y_src*Y

  1492          */

  1493         OWF_Image_SetPixel(dst,

  1494                            ox + x * xx + y * yx,

  1495                            oy + x * xy + y * yy,

  1496                            OWF_Image_GetPixelPtr(src, x, y));

  1497         }

  1498     }

  1499 }

  1501 /*----------------------------------------------------------------------------*/

  1502 OWF_API_CALL void

  1503 OWF_Image_Flip(OWF_IMAGE* image,

  1504                OWF_FLIP_DIRECTION dir)

  1505 {

  1506     OWFint                  x, y;

  1508     DPRINT(("OWF_Image_Flip"));

  1510     if (!image)

  1511     {

  1512         return;

  1513     }

  1514     OWF_ASSERT(image->format.pixelFormat==OWF_IMAGE_ARGB_INTERNAL);

  1516     if (dir & OWF_FLIP_VERTICALLY)

  1517     {

  1518         OWFint h = image->height/2;

  1520         for (y = 0; y < h; y++)

  1521         {

  1522             for (x = 0; x < image->width; x++)

  1523             {

  1524                 OWFpixel        pix;

  1526                 OWF_Image_GetPixel(image, x, y, &pix);

  1527                 OWF_Image_SetPixel(image, x, y,

  1528                                    OWF_Image_GetPixelPtr(image,

  1529                                                          x,

  1530                                                          image->height - 1 - y

  1531                                                          ));

  1532                 OWF_Image_SetPixel(image, x, image->height - 1 - y, &pix);

  1533             }

  1534         }

  1535     }

  1537     if (dir & OWF_FLIP_HORIZONTALLY)

  1538     {

  1539         OWFint w = image->width/2;

  1541         for (y = 0; y < image->height; y++)

  1542         {

  1543             for (x = 0; x < w; x++)

  1544             {

  1545                 OWFpixel        pix;

  1547                 OWF_Image_GetPixel(image, x, y, &pix);

  1548                 OWF_Image_SetPixel(image, x, y,

  1549                                    OWF_Image_GetPixelPtr(image,

  1550                                                          image->width - 1 - x,

  1551                                                          y

  1552                                                          ));

  1553                 OWF_Image_SetPixel(image, image->width - 1 - x, y, &pix);

  1554             }

  1555         }

  1556     }

  1557 }

  1559 /*----------------------------------------------------------------------------*/

  1560 #define BLENDER_INNER_LOOP_BEGIN \

  1561     OWFint rowCount = drect.height; \

  1562     while (rowCount > 0) { \

  1563         OWFint colCount = drect.width; \

  1564         while (colCount > 0) {

  1566 #define BLENDER_INNER_LOOP_END \

  1567             srcPtr ++; \

  1568             dstPtr ++; \

  1569             maskPtr++; \

  1570             --colCount; \

  1571         } \

  1572         srcPtr += srcLineDelta; \

  1573         dstPtr += dstLineDelta; \

  1574         maskPtr += maskLineDelta; \

  1575         --rowCount; \

  1576     }

  1578 #define BLENDER_INNER_LOOP_END_NO_MASK \

  1579             srcPtr ++; \

  1580             dstPtr ++; \

  1581             --colCount; \

  1582         } \

  1583         srcPtr += srcLineDelta; \

  1584         dstPtr += dstLineDelta; \

  1585         --rowCount; \

  1586     }

  1588 #define SA srcPtr->color.alpha

  1589 #define SR srcPtr->color.red

  1590 #define SG srcPtr->color.green

  1591 #define SB srcPtr->color.blue

  1593 #define DA dstPtr->color.alpha

  1594 #define DR dstPtr->color.red

  1595 #define DG dstPtr->color.green

  1596 #define DB dstPtr->color.blue

  1598 #define MA *maskPtr

  1599 #define GA blend->globalAlpha

  1601 OWF_API_CALL void

  1602 OWF_Image_Blend(OWF_BLEND_INFO* blend,

  1603                 OWF_TRANSPARENCY transparency)

  1604 {

  1605     OWF_IMAGE*              dst;

  1606     OWF_IMAGE*              src;

  1607     OWF_IMAGE*              mask;

  1608     OWF_RECTANGLE*          srcRect;

  1609     OWF_RECTANGLE*          dstRect;

  1610     OWF_RECTANGLE           bounds, srect, drect, rect;

  1611     OWFint                  srcLineDelta, dstLineDelta, maskLineDelta;

  1612     OWFpixel*               srcPtr;

  1613     OWFpixel*               dstPtr;

  1614     OWFsubpixel*            maskPtr;

  1617     /* preparation */

  1618     OWF_ASSERT(blend);

  1619     DPRINT(("OWF_Image_Blend: transparency = %d", transparency));

  1620     /* Mask must be set if mask-transparency is used */

  1621     OWF_ASSERT(((transparency & OWF_TRANSPARENCY_MASK) && blend->mask) ||

  1622            !(transparency & OWF_TRANSPARENCY_MASK));

  1624     OWF_ASSERT(blend->source.image->format.pixelFormat == OWF_IMAGE_ARGB_INTERNAL);

  1625     OWF_ASSERT(blend->destination.image->format.pixelFormat == OWF_IMAGE_ARGB_INTERNAL);

  1626     if (blend->mask)

  1627     {

  1628         OWF_ASSERT(blend->mask->format.pixelFormat == OWF_IMAGE_L32);

  1629     }

  1631     dst     = blend->destination.image;

  1632     src     = blend->source.image;

  1633     mask    = blend->mask;

  1634     dstRect = blend->destination.rectangle;

  1635     srcRect = blend->source.rectangle;

  1637     /* this is actually asserted above */

  1638     if (OWF_TRANSPARENCY_MASK == (transparency & OWF_TRANSPARENCY_MASK) &&

  1639         NULL == mask)

  1640     {

  1641         return;

  1642     }

  1644     OWF_Rect_Set(&bounds, 0, 0, dst->width, dst->height);

  1645     /* NOTE: src and dst rects should be of same size!!! */

  1646     OWF_Rect_Set(&rect,

  1647                  dstRect->x, dstRect->y,

  1648                  dstRect->width, dstRect->height);

  1649     OWF_Rect_Set(&srect,

  1650                  srcRect->x, srcRect->y,

  1651                  srcRect->width, srcRect->height);

  1653     /* clip destination rectangle against bounds */

  1654     if (!OWF_Rect_Clip(&drect, &rect, &bounds))

  1655     {

  1656         return;

  1657     }

  1659     /* adjust source rectangle if needed */

  1660     if (drect.x > rect.x)

  1661     {

  1662         OWFint dx = drect.x - rect.x;

  1663         srect.x += dx;

  1664         srect.width -= dx;

  1665     }

  1667     if (drect.y > rect.y)

  1668     {

  1669         OWFint dy = drect.y - rect.y;

  1670         srect.y += dy;

  1671         srect.height -= dy;

  1672     }

  1674     if (drect.width < srect.width)

  1675     {

  1676         srect.width = drect.width;

  1677     }

  1679     if (drect.height < srect.height)

  1680     {

  1681         srect.height = drect.height;

  1682     }

  1685     srcPtr  = (OWFpixel*) src->data;

  1686     srcPtr  += srect.y * src->width + srect.x;

  1687     dstPtr  = (OWFpixel*) dst->data;

  1688     dstPtr  += drect.y * dst->width + drect.x;

  1690     if (mask)

  1691     {

  1692         maskPtr = (OWFsubpixel*) mask->data + srect.y * mask->width + srect.x;

  1693         maskLineDelta = mask->width - drect.width;

  1694     }

  1695     else

  1696     {

  1697         maskPtr = 0;

  1698         maskLineDelta = 0;

  1699     }

  1700     srcLineDelta = src->width - srect.width;

  1701     dstLineDelta = dst->width - drect.width;

  1703     /* inner loops */

  1704     switch (transparency)

  1705     {

  1706         case OWF_TRANSPARENCY_NONE:

  1707         {

  1708             /*

  1709             rgb     = src.rgb

  1710             alpha    = 1

  1711             */

  1712             BLENDER_INNER_LOOP_BEGIN;

  1713 #ifdef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

  1714                 DR = SR;

  1715                 DG = SG;

  1716                 DB = SB;

  1717                 DA = OWF_FULLY_OPAQUE;

  1718 #else

  1719                 *(OWFuint32*)dstPtr = *(OWFuint32*)srcPtr | ARGB8888_ALPHA_MASK;

  1720 #endif

  1721             BLENDER_INNER_LOOP_END_NO_MASK;

  1722             break;

  1723         }

  1725         case OWF_TRANSPARENCY_GLOBAL_ALPHA:

  1726         {

  1727             /*

  1728             rgb        = src.rgb * elem.alpha + dst.rgb * (1 - elem.alpha)

  1729             alpha   = elem.alpha + dst.alpha * (1 - elem.alpha)

  1730             */

  1731             BLENDER_INNER_LOOP_BEGIN;

  1732                 DR = (SR * GA + DR * (OWF_FULLY_OPAQUE - GA) + OWF_BLEND_ROUNDING_VALUE) /

  1733                      OWF_ALPHA_MAX_VALUE;

  1734                 DG = (SG * GA + DG * (OWF_FULLY_OPAQUE - GA) + OWF_BLEND_ROUNDING_VALUE) /

  1735                      OWF_ALPHA_MAX_VALUE;

  1736                 DB = (SB * GA + DB * (OWF_FULLY_OPAQUE - GA) + OWF_BLEND_ROUNDING_VALUE) /

  1737                      OWF_ALPHA_MAX_VALUE;

  1738                 DA = GA + (DA * (OWF_FULLY_OPAQUE - GA) + OWF_BLEND_ROUNDING_VALUE) /

  1739                      OWF_ALPHA_MAX_VALUE;

  1740             BLENDER_INNER_LOOP_END_NO_MASK;

  1741             break;

  1742         }

  1744         case OWF_TRANSPARENCY_SOURCE_ALPHA:

  1745         {

  1746 #ifndef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

  1747         OWFuint32 redBlueMask = (ARGB8888_RED_MASK | ARGB8888_BLUE_MASK);

  1748         OWFuint32 alphaGreenMask = (ARGB8888_ALPHA_MASK | ARGB8888_GREEN_MASK);

  1749         OWFuint32 halfRedBlue = 0x00800080;

  1750 #endif

  1751             /*

  1752             rgb     = src.rgb + dst.rgb * (1 - src.alpha)

  1753             alpha    = src.alpha + dst.alpha * (1 - src.alpha)

  1754             */

  1755             BLENDER_INNER_LOOP_BEGIN;

  1756 #ifdef OWF_IMAGE_INTERNAL_PIXEL_IS_FLOAT

  1757             DR = SR + (DR * (OWF_FULLY_OPAQUE - SA) + OWF_BLEND_ROUNDING_VALUE) / OWF_ALPHA_MAX_VALUE;

  1758             DG = SG + (DG * (OWF_FULLY_OPAQUE - SA) + OWF_BLEND_ROUNDING_VALUE) / OWF_ALPHA_MAX_VALUE;

  1759             DB = SB + (DB * (OWF_FULLY_OPAQUE - SA) + OWF_BLEND_ROUNDING_VALUE) / OWF_ALPHA_MAX_VALUE;

  1760             DA = SA + (DA * (OWF_FULLY_OPAQUE - SA) + OWF_BLEND_ROUNDING_VALUE) / OWF_ALPHA_MAX_VALUE;

  1761 #else

  1762             {

  1763                 OWFuint32 srcP = *(OWFuint32*)srcPtr;

  1764                 OWFuint8 srcA = srcP >> ARGB8888_ALPHA_SHIFT;

  1766                 if (srcA == OWF_ALPHA_MAX_VALUE)

  1767                     {

  1768                     /* Fully opaque source pixel */

  1769                     *(OWFuint32*)dstPtr = srcP;

  1770                     }

  1771                 else

  1772                     {

  1773                     if (srcA)

  1774                         {

  1775                         /* Not fully transparent source pixel. Algorithm after Jim Blinn */

  1776                         OWFuint32 mask = 0xFF - srcA;

  1777                         OWFuint32 dstP = *(OWFuint32*)dstPtr;

  1778                         OWFuint32 blend;

  1780                         blend = mask * (dstP & redBlueMask) + halfRedBlue;

  1781                         srcP += ((blend + ((blend >> 8) & redBlueMask) >> 8)) & redBlueMask;

  1782                         blend = mask * ((dstP >> 8) & redBlueMask) + halfRedBlue;

  1783                         srcP += (blend + ((blend >> 8) & redBlueMask)) & alphaGreenMask;

  1785                         *(OWFuint32*)dstPtr = srcP;

  1786                         }

  1787                     }

  1788             }

  1789 #endif

  1790             BLENDER_INNER_LOOP_END_NO_MASK;

  1791             break;

  1792         }

  1794         case OWF_TRANSPARENCY_MASK:

  1795         {

  1796             /*

  1797             rgb     = src.rgb * mask.alpha + dst.rgb * (1 - mask.alpha)

  1798             alpha    = mask.alpha + dst.alpha * (1 - mask.alpha)

  1799             */

  1800             BLENDER_INNER_LOOP_BEGIN;

  1801                 DR = (SR * MA + DR * (OWF_FULLY_OPAQUE - MA) + OWF_BLEND_ROUNDING_VALUE) /

  1802                      OWF_ALPHA_MAX_VALUE;

  1803                 DG = (SG * MA + DG * (OWF_FULLY_OPAQUE - MA) + OWF_BLEND_ROUNDING_VALUE) /

  1804                      OWF_ALPHA_MAX_VALUE;

  1805                 DB = (SB * MA + DB * (OWF_FULLY_OPAQUE - MA) + OWF_BLEND_ROUNDING_VALUE) /

  1806                      OWF_ALPHA_MAX_VALUE;

  1807                 DA = MA + (DA * (OWF_FULLY_OPAQUE - MA) + OWF_BLEND_ROUNDING_VALUE) /

  1808                      OWF_ALPHA_MAX_VALUE;

  1809             BLENDER_INNER_LOOP_END;

  1810             break;

  1811         }

  1813         case OWF_TRANSPARENCY_GLOBAL_ALPHA | OWF_TRANSPARENCY_SOURCE_ALPHA:

  1814         {

  1815             /*

  1816             rgb = src.rgb * elem.a + dst.rgb * (1 - src.a * elem.a)

  1817             a = src.a * elem.a + dst.a * (1 - src.a * elem.a)

  1818             */

  1819             OWFsubpixel         SAEA;

  1821             BLENDER_INNER_LOOP_BEGIN;

  1822                 SAEA = SA * GA / OWF_ALPHA_MAX_VALUE;

  1823                 DR = (SR * GA + DR * (OWF_FULLY_OPAQUE - SAEA) + OWF_BLEND_ROUNDING_VALUE) /

  1824                      OWF_ALPHA_MAX_VALUE;

  1825                 DG = (SG * GA + DG * (OWF_FULLY_OPAQUE - SAEA) + OWF_BLEND_ROUNDING_VALUE) /

  1826                      OWF_ALPHA_MAX_VALUE;

  1827                 DB = (SB * GA + DB * (OWF_FULLY_OPAQUE - SAEA) + OWF_BLEND_ROUNDING_VALUE) /

  1828                      OWF_ALPHA_MAX_VALUE;

  1829                 DA = SAEA + (DA * (OWF_FULLY_OPAQUE - SAEA) + OWF_BLEND_ROUNDING_VALUE) /

  1830                          OWF_ALPHA_MAX_VALUE;

  1831             BLENDER_INNER_LOOP_END_NO_MASK;

  1832             break;

  1833         }

  1835         case OWF_TRANSPARENCY_GLOBAL_ALPHA | OWF_TRANSPARENCY_MASK:

  1836         {

  1837             /*

  1838             rgb    = src.rgb * mask.a * elem.a + dst.rgb * (1 - mask.a * elem.a)

  1839             a     = mask.a * elem.a + dest.a * (1 - mask.a * elem.a)

  1840             */

  1841             OWFsubpixel             MAEA;

  1843             BLENDER_INNER_LOOP_BEGIN;

  1844                 MAEA = MA * GA / OWF_ALPHA_MAX_VALUE;

  1845                 DR = (SR * MAEA + DR * (OWF_FULLY_OPAQUE - MAEA) + OWF_BLEND_ROUNDING_VALUE) /

  1846                      OWF_ALPHA_MAX_VALUE;

  1847                 DG = (SG * MAEA + DG * (OWF_FULLY_OPAQUE - MAEA) + OWF_BLEND_ROUNDING_VALUE) /

  1848                      OWF_ALPHA_MAX_VALUE;

  1849                 DB = (SB * MAEA + DB * (OWF_FULLY_OPAQUE - MAEA) + OWF_BLEND_ROUNDING_VALUE) /

  1850                      OWF_ALPHA_MAX_VALUE;

  1851                 DA = MAEA + (DA * (OWF_FULLY_OPAQUE - MAEA) + OWF_BLEND_ROUNDING_VALUE) /

  1852                      OWF_ALPHA_MAX_VALUE;

  1853                 //No need to check with OWF_ALPHA_MIN_VALUE as it is zero

  1854                 OWF_ASSERT(GA <= OWF_ALPHA_MAX_VALUE);

  1855             BLENDER_INNER_LOOP_END;

  1856             break;

  1857         }

  1859         default:

  1860         {

  1861             DPRINT(("OWF_Image_Blend: whooops. invalid blending mode\n"));

  1862             abort();

  1863             break;

  1864         }

  1865     }

  1866 }

  1868 /*----------------------------------------------------------------------------*/

  1869 OWF_API_CALL void*

  1870 OWF_Image_AllocData(OWF_DISPCTX dc, OWFint width, OWFint height, OWF_PIXEL_FORMAT pixelFormat)

  1871 {

  1872     OWF_IMAGE_FORMAT        imgf;

  1873     OWFint                  stride;

  1875     DPRINT(("OWF_Image_AllocData"));

  1877     /* kludge. GetStride need pixelFormat. */

  1878     imgf.pixelFormat = pixelFormat;

  1879     imgf.rowPadding = OWF_Image_GetFormatPadding(pixelFormat);

  1880     stride = OWF_Image_GetStride(width, &imgf, 0);

  1882     OWF_ASSERT (width > 0 && height > 0);

  1884     if (stride == 0)

  1885     {

  1886         return NULL;

  1887     }

  1889     if (dc)

  1890         {

  1891         return OWF_DisplayContext_ScratchBuffer_Allocate(dc, height * stride);

  1892         }

  1894     return xalloc(1, height * stride);

  1895 }

  1897 /*----------------------------------------------------------------------------*/

  1898 OWF_API_CALL void

  1899 OWF_Image_FreeData(OWF_DISPCTX dc, void** data)

  1900 {

  1901     DPRINT(("OWF_Image_FreeData"));

  1903     if (*data)

  1904     {

  1905     if (dc)

  1906         {

  1907         OWF_DisplayContext_ScratchBuffer_Destroy(dc, *data);

  1908         }

  1909     else

  1910         {

  1911         xfree(*data);

  1912         }

  1913     }

  1914     *data = NULL;

  1915 }

  1917 /*----------------------------------------------------------------------------*/

  1918 OWF_API_CALL OWFint

  1919 OWF_Image_GetFormatPixelSize(OWF_PIXEL_FORMAT format)

  1920 {

  1921     DPRINT(("OWF_Image_GetFormatPixelSize"));

  1923     switch (format)

  1924     {

  1925         case OWF_IMAGE_ARGB_INTERNAL:

  1926         {

  1927             return sizeof(OWFpixel);

  1928         }

  1930         case OWF_IMAGE_ARGB8888:

  1931         case OWF_IMAGE_XRGB8888:

  1932         case OWF_IMAGE_L32:

  1933         {

  1934             return 4;

  1935         }

  1937         case OWF_IMAGE_RGB888:

  1938         {

  1939             return 3;

  1940         }

  1942         case OWF_IMAGE_RGB565:

  1943         case OWF_IMAGE_L16:

  1944         {

  1945             return 2;

  1946         }

  1948         case OWF_IMAGE_L8:

  1949         {

  1950             return 1;

  1951         }

  1953         case OWF_IMAGE_L1:

  1954         {

  1955             /* Use negative numbers for divisor, e.g., -8 = 1/8. */

  1956             /* L1 is 1 bit alpha, LSB->MSB, each row padded to 32-bit

  1957              * boundary. */

  1958             return -8;

  1959         }

  1960         default:

  1961         {

  1962             return 0;

  1963         }

  1964     }

  1965 }

  1967 /*----------------------------------------------------------------------------*/

  1968 OWF_API_CALL OWFint

  1969 OWF_Image_GetFormatPadding(OWF_PIXEL_FORMAT format)

  1970 {

  1971     OWFint                  padding = 1;

  1973     DPRINT(("OWF_Image_GetFormatPadding"));

  1975     switch (format)

  1976     {

  1977         case OWF_IMAGE_ARGB_INTERNAL:

  1978         {

  1979             padding = sizeof(OWFpixel);

  1980             break;

  1981         }

  1983         case OWF_IMAGE_ARGB8888:

  1984         case OWF_IMAGE_XRGB8888:

  1985         case OWF_IMAGE_L32:

  1986         {

  1987             padding = 4;

  1988             break;

  1989         }

  1991         /*

  1992         case OWF_IMAGE_RGB888:

  1993         {

  1994             return 3;

  1995         }

  1996         */

  1998         case OWF_IMAGE_RGB565:

  1999         case OWF_IMAGE_L16:

  2000         {

  2001             padding = 2;

  2002             break;

  2003         }

  2005         case OWF_IMAGE_L8:

  2006         {

  2007             padding = 1;

  2008             break;

  2009         }

  2011         case OWF_IMAGE_L1:

  2012         {

  2013             /* Use negative numbers for divisor, e.g., -8 = 1/8. */

  2014             /* L1 is 1 bit alpha, LSB->MSB, each row padded to 32-bit

  2015              * boundary. */

  2016             padding = 4;

  2017             break;

  2018         }

  2019         default:

  2020         {

  2021 			OWF_ASSERT(0);

  2022             break;

  2023         }

  2024     }

  2027     return padding;

  2028 }

  2030 /*----------------------------------------------------------------------------*/

  2031 OWF_API_CALL void

  2032 OWF_Image_SwapWidthAndHeight(OWF_IMAGE* image)

  2033 {

  2034     DPRINT(("OWF_Image_SwapWidthAndHeight"));

  2036     /* swap w & h. Note that original stride is not restored if swap back. */

  2037     image->width ^= image->height;

  2038     image->height ^= image->width;

  2039     image->width ^= image->height;

  2041     image->stride = OWF_Image_GetStride(image->width, &image->format, 0);

  2042 }

  2044 /*----------------------------------------------------------------------------*/

  2045 OWF_API_CALL OWFboolean

  2046 OWF_Image_ConvertMask(OWF_IMAGE* output, OWF_IMAGE* input)

  2047 {

  2048     OWFboolean              result = OWF_TRUE;

  2049     void*                   srcLinePtr;

  2050     OWFsubpixel*            dstLinePtr;

  2051     OWFint                  countY;

  2053     DPRINT(("OWF_Image_ConvertMask:"));

  2054     DPRINT(("  Converting mask from stream format to internal 8-bit"));

  2056     OWF_ASSERT(input);

  2057     OWF_ASSERT(output);

  2059     srcLinePtr = input->data;

  2060     dstLinePtr = (OWFsubpixel*) output->data;

  2062     for (countY = input->height; countY; countY--)

  2063     {

  2064         OWFsubpixel* dstData = dstLinePtr;

  2066         switch (input->format.pixelFormat)

  2067         {

  2068             case OWF_IMAGE_L1:

  2069             {

  2070                 OWFint          countX;

  2071                 OWFuint8*       srcData = (OWFuint8*) srcLinePtr;

  2073                 DPRINT(("1-bit alpha, width = %d, height = %d",

  2074                        input->width, input->height));

  2076                 for (countX = 0; countX < input->width; countX++)

  2077                 {

  2078                     /*

  2079                      * alpha pixel ordering is LSB -> MSB

  2080                      *

  2081                      * byte# |----- byte 0 ----|----- byte 1-----|--

  2082                      * bit#  | 7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 |

  2083                      * pix#  | 7 6 5 4 3 2 1 0 | f e d c b a 9 8 | ...

  2084                      */

  2085                     if (srcData[countX >> 3] & (1 << (countX & 7)))

  2086                     {

  2087                         dstData[countX] = OWF_FULLY_OPAQUE;

  2088                     }

  2089                     else

  2090                     {

  2091                         dstData[countX] = OWF_FULLY_TRANSPARENT;

  2092                     }

  2093                 }

  2094                 break;

  2095             }

  2096             case OWF_IMAGE_L8:

  2097             {

  2098                 OWFint          countX;

  2099                 OWFuint8*       srcData = (OWFuint8*) srcLinePtr;

  2101                 DPRINT(("8-bit alpha, width = %d, height = %d",

  2102                        input->width, input->height));

  2104                 for (countX = 0; countX < input->width; countX++)

  2105                 {

  2106                     dstData[countX] = srcData[countX] * OWF_FULLY_OPAQUE /

  2107                                  (OWFfloat) OWF_BYTE_MAX_VALUE;

  2108                 }

  2109                 break;

  2110             }

  2111             case OWF_IMAGE_ARGB8888:

  2112             {

  2113                 /* ARGB image - take the alpha channel and discard

  2114                  * everything else */

  2115                 OWFint          countX;

  2116                 OWFuint32*      srcData = (OWFuint32*) srcLinePtr;

  2118                 DPRINT(("32-bit ARGB, width = %d, height = %d",

  2119                        input->width, input->height));

  2121                 for (countX = 0; countX < input->width; countX++)

  2122                 {

  2123                     dstData[countX] = (srcData[countX] >> 24) * OWF_FULLY_OPAQUE /

  2124                                  (OWFfloat) OWF_BYTE_MAX_VALUE;

  2125                 }

  2126                 break;

  2127             }

  2128             default:

  2129             {

  2130                 DPRINT(("Unsupported alpha format, ignoring mask"));

  2132                 result = OWF_FALSE;

  2133                 break;

  2134             }

  2135         }

  2137         dstLinePtr+=output->width;

  2138         /* Presumes that the stride is always whole bytes - eg. a 2x2-pixel mono

  2139          * image takes at least 2 bytes */

  2140         srcLinePtr=(OWFuint8*)srcLinePtr+input->stride;

  2141     }

  2142     return result;

  2143 }

  2145 #ifdef __cplusplus

  2146 }

  2147 #endif

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--