1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/graphics/graphicscomposition/openwfcompositionengine/common/src/owfutils.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,118 @@
1.4 +/* Copyright (c) 2009 The Khronos Group Inc.
1.5 + *
1.6 + * Permission is hereby granted, free of charge, to any person obtaining a
1.7 + * copy of this software and/or associated documentation files (the
1.8 + * "Materials"), to deal in the Materials without restriction, including
1.9 + * without limitation the rights to use, copy, modify, merge, publish,
1.10 + * distribute, sublicense, and/or sell copies of the Materials, and to
1.11 + * permit persons to whom the Materials are furnished to do so, subject to
1.12 + * the following conditions:
1.13 + *
1.14 + * The above copyright notice and this permission notice shall be included
1.15 + * in all copies or substantial portions of the Materials.
1.16 + *
1.17 + * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
1.18 + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
1.19 + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
1.20 + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
1.21 + * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
1.22 + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
1.23 + * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
1.24 + */
1.25 +
1.26 + #include "owftypes.h"
1.27 +
1.28 +#ifdef __cplusplus
1.29 +extern "C" {
1.30 +#endif
1.31 +
1.32 +OWFint min(OWFint aLhs, OWFint aRhs)
1.33 +{
1.34 + if (aLhs < aRhs) {
1.35 + return aLhs;
1.36 + }
1.37 + return aRhs;
1.38 +}
1.39 +
1.40 +void OWF_Rect_Set(OWF_RECTANGLE* rect,
1.41 + OWFint left,
1.42 + OWFint top,
1.43 + OWFint width,
1.44 + OWFint height)
1.45 +{
1.46 + if (!rect) {
1.47 + return;
1.48 + }
1.49 +
1.50 + rect->x = left;
1.51 + rect->y = top;
1.52 + rect->width = width;
1.53 + rect->height = height;
1.54 +}
1.55 +
1.56 +OWFboolean OWF_Rect_Clip(OWF_RECTANGLE* clipped,
1.57 + OWF_RECTANGLE* rect,
1.58 + OWF_RECTANGLE* bounds)
1.59 +{
1.60 + OWFint dw, dh, dx0, dy0, dx1, dy1; /* destination image coordinates */
1.61 + OWFint bl, bt, br, bb;
1.62 +
1.63 + bl = bounds->x;
1.64 + bt = bounds->y;
1.65 + br = bl + bounds->width;
1.66 + bb = bt + bounds->height;
1.67 +
1.68 + dw = rect->width;
1.69 + dh = rect->height;
1.70 + dx0 = rect->x;
1.71 + dy0 = rect->y;
1.72 +
1.73 + /* Crop x coords to target image width */
1.74 + if (dx0 < bl) {
1.75 + dw = dw - (bl - dx0);
1.76 + dx0 = bl;
1.77 + }
1.78 +
1.79 + /* check if destination rectangle is outside target image */
1.80 + if (dx0 >= br) {
1.81 + return OWF_FALSE;
1.82 + }
1.83 +
1.84 + /* Crop y coord to target image height */
1.85 + if (dy0 < bt) {
1.86 + dh = dh - (bt - dy0);
1.87 + dy0 = bt;
1.88 + }
1.89 +
1.90 + /* check if destination rectangle is outside target image */
1.91 + if (dy0 >= bb) {
1.92 + return OWF_FALSE;
1.93 + }
1.94 +
1.95 + /* clamp right edge */
1.96 + dx1 = dx0 + dw;
1.97 + if (dx1 >= br) {
1.98 + dx1 = br;
1.99 + } else if (dx1 < bl) {
1.100 + return OWF_FALSE;
1.101 + }
1.102 +
1.103 + /* clamp bottom edge */
1.104 + dy1 = dy0 + dh;
1.105 + if (dy1 >= bb) {
1.106 + dy1 = bb;
1.107 + } else if (dy1 < bt) {
1.108 + return OWF_FALSE;
1.109 + }
1.110 +
1.111 + clipped->x = dx0;
1.112 + clipped->y = dy0;
1.113 + clipped->width = dx1 - dx0;
1.114 + clipped->height = dy1 - dy0;
1.115 +
1.116 + return OWF_TRUE;
1.117 +}
1.118 +
1.119 +#ifdef __cplusplus
1.120 +}
1.121 +#endif