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/* Copyright (c) 2009 The Khronos Group Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and/or associated documentation files (the
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* "Materials"), to deal in the Materials without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Materials, and to
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* permit persons to whom the Materials are furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Materials.
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*
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* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
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*/
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#include "owftypes.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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OWFint min(OWFint aLhs, OWFint aRhs)
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{
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if (aLhs < aRhs) {
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return aLhs;
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}
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return aRhs;
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}
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void OWF_Rect_Set(OWF_RECTANGLE* rect,
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OWFint left,
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OWFint top,
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OWFint width,
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OWFint height)
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{
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if (!rect) {
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return;
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}
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rect->x = left;
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rect->y = top;
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rect->width = width;
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rect->height = height;
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}
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OWFboolean OWF_Rect_Clip(OWF_RECTANGLE* clipped,
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OWF_RECTANGLE* rect,
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OWF_RECTANGLE* bounds)
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{
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OWFint dw, dh, dx0, dy0, dx1, dy1; /* destination image coordinates */
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OWFint bl, bt, br, bb;
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bl = bounds->x;
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bt = bounds->y;
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br = bl + bounds->width;
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bb = bt + bounds->height;
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dw = rect->width;
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dh = rect->height;
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dx0 = rect->x;
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dy0 = rect->y;
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/* Crop x coords to target image width */
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if (dx0 < bl) {
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dw = dw - (bl - dx0);
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dx0 = bl;
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}
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/* check if destination rectangle is outside target image */
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if (dx0 >= br) {
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return OWF_FALSE;
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}
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/* Crop y coord to target image height */
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if (dy0 < bt) {
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dh = dh - (bt - dy0);
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dy0 = bt;
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}
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/* check if destination rectangle is outside target image */
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if (dy0 >= bb) {
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return OWF_FALSE;
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}
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/* clamp right edge */
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dx1 = dx0 + dw;
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if (dx1 >= br) {
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dx1 = br;
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} else if (dx1 < bl) {
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return OWF_FALSE;
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}
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/* clamp bottom edge */
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dy1 = dy0 + dh;
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if (dy1 >= bb) {
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dy1 = bb;
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} else if (dy1 < bt) {
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return OWF_FALSE;
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}
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clipped->x = dx0;
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clipped->y = dy0;
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clipped->width = dx1 - dx0;
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clipped->height = dy1 - dy0;
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return OWF_TRUE;
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}
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#ifdef __cplusplus
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}
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#endif
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