kiss-lang/lime
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Crop rectangle in image.copyChannel

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This commit is contained in:
Joshua Granick
2015-07-13 13:03:46 -07:00
parent 1c7d70646f
commit ec34739a85
2 changed files with 66 additions and 20 deletions
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43
project/src/graphics/utils/ImageDataUtil.cpp
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@@ -87,19 +87,47 @@ namespace lime {
void ImageDataUtil::CopyChannel (Image* image, Image* sourceImage, Rectangle* sourceRect, Vector2* destPoint, int srcChannel, int destChannel) {
int width = sourceRect->width;
int height = sourceRect->height;
if (destPoint->x + width > image->width) {
width = image->width - destPoint->x;
}
if (sourceRect->x + width > sourceImage->width) {
width = sourceImage->width - sourceRect->x;
}
if (destPoint->y + height > image->height) {
height = image->height - destPoint->y;
}
if (sourceRect->y + height > sourceImage->height) {
height = sourceImage->height - sourceRect->y;
}
if (width <= 0 || height <= 0) return;
int srcStride = sourceImage->buffer->Stride ();
int srcPosition = ((sourceRect->x + sourceImage->offsetX) * 4) + (srcStride * (sourceRect->y + sourceImage->offsetY)) + srcChannel;
int srcRowOffset = srcStride - int (4 * (sourceRect->width + sourceImage->offsetX));
int srcRowEnd = 4 * (sourceRect->x + sourceImage->offsetX + sourceRect->width);
int srcRowOffset = srcStride - int (4 * width);
int srcRowEnd = 4 * (sourceRect->x + sourceImage->offsetX + width);
uint8_t* srcData = (uint8_t*)sourceImage->buffer->data->Data ();
int destStride = image->buffer->Stride ();
int destPosition = ((destPoint->x + image->offsetX) * 4) + (destStride * (destPoint->y + image->offsetY)) + destChannel;
int destRowOffset = destStride - int (4 * (sourceRect->width + image->offsetX));
int destRowEnd = 4 * (destPoint->x + image->offsetX + sourceRect->width);
int destRowOffset = destStride - int (4 * width);
uint8_t* destData = (uint8_t*)image->buffer->data->Data ();
int length = sourceRect->width * sourceRect->height;
int length = width * height;
for (int i = 0; i < length; i++) {
@@ -111,11 +139,6 @@ namespace lime {
if ((srcPosition % srcStride) > srcRowEnd) {
srcPosition += srcRowOffset;
}
if ((destPosition % destStride) > destRowEnd) {
destPosition += destRowOffset;
}