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Port new copyChannel to native

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This commit is contained in:
Joshua Granick
2015-07-21 09:21:49 -07:00
parent e54502354c
commit 07db467ab6
2 changed files with 45 additions and 49 deletions
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88
project/src/graphics/utils/ImageDataUtil.cpp
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@@ -50,59 +50,55 @@ 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 * 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 * width);
uint8_t* destData = (uint8_t*)image->buffer->data->Data ();
int length = width * height;
ImageDataView srcView = ImageDataView (sourceImage, sourceRect);
ImageDataView destView = ImageDataView (image, &Rectangle (destPoint->x, destPoint->y, srcView.width, srcView.height));
for (int i = 0; i < length; i++) {
PixelFormat srcFormat = sourceImage->buffer->format;
PixelFormat destFormat = image->buffer->format;
bool srcPremultiplied = sourceImage->buffer->premultiplied;
bool destPremultiplied = image->buffer->premultiplied;
int srcPosition;
int destPosition;
RGBA srcPixel;
RGBA destPixel;
unsigned char value = 0;
for (int y = 0; y < destView.height; y++) {
destData[destPosition] = srcData[srcPosition];
srcPosition = srcView.Row (y);
destPosition = destView.Row (y);
srcPosition += 4;
destPosition += 4;
if ((srcPosition % srcStride) > srcRowEnd) {
for (int x = 0; x < destView.width; x++) {
srcPosition += srcRowOffset;
destPosition += destRowOffset;
srcPixel.ReadUInt8 (srcData, srcPosition, srcFormat, srcPremultiplied);
destPixel.ReadUInt8 (destData, destPosition, destFormat, destPremultiplied);
switch (srcChannel) {
case 0: value = srcPixel.r; break;
case 1: value = srcPixel.g; break;
case 2: value = srcPixel.b; break;
case 3: value = srcPixel.a; break;
}
switch (destChannel) {
case 0: destPixel.r = value; break;
case 1: destPixel.g = value; break;
case 2: destPixel.b = value; break;
case 3: destPixel.a = value; break;
}
destPixel.WriteUInt8 (destData, destPosition, destFormat, destPremultiplied);
srcPosition += 4;
destPosition += 4;
}