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add Canvas constructor & add canvas:blit

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This commit is contained in:
MihailRis 2025-03-08 14:02:57 +03:00
parent 5bbba7f39d
commit 2af55a0227
5 changed files with 71 additions and 26 deletions
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32
src/graphics/core/ImageData.cpp
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@ -81,13 +81,13 @@ void ImageData::flipY() {
}
}
void ImageData::blit(const ImageData* image, int x, int y) {
if (format == image->format) {
void ImageData::blit(const ImageData& image, int x, int y) {
if (format == image.format) {
blitMatchingFormat(image, x, y);
return;
}
if (format == ImageFormat::rgba8888 &&
image->format == ImageFormat::rgb888) {
image.format == ImageFormat::rgb888) {
blitRGB_on_RGBA(image, x, y);
return;
}
@ -187,10 +187,10 @@ void ImageData::drawLine(int x1, int y1, int x2, int y2, const glm::ivec4& color
}
}
void ImageData::blitRGB_on_RGBA(const ImageData* image, int x, int y) {
ubyte* source = image->getData();
uint srcwidth = image->getWidth();
uint srcheight = image->getHeight();
void ImageData::blitRGB_on_RGBA(const ImageData& image, int x, int y) {
ubyte* source = image.getData();
uint srcwidth = image.getWidth();
uint srcheight = image.getHeight();
for (uint srcy = std::max(0, -y);
srcy < std::min(srcheight, height - y);
@ -210,7 +210,7 @@ void ImageData::blitRGB_on_RGBA(const ImageData* image, int x, int y) {
}
}
void ImageData::blitMatchingFormat(const ImageData* image, int x, int y) {
void ImageData::blitMatchingFormat(const ImageData& image, int x, int y) {
uint comps;
switch (format) {
case ImageFormat::rgb888: comps = 3; break;
@ -218,20 +218,24 @@ void ImageData::blitMatchingFormat(const ImageData* image, int x, int y) {
default:
throw std::runtime_error("only unsigned byte formats supported");
}
ubyte* source = image->getData();
uint srcwidth = image->getWidth();
uint srcheight = image->getHeight();
ubyte* source = image.getData();
const uint width = this->width;
const uint height = this->height;
const uint src_width = image.getWidth();
const uint src_height = image.getHeight();
ubyte* data = this->data.get();
for (uint srcy = std::max(0, -y);
srcy < std::min(srcheight, height - y);
srcy < std::min(src_height, height - y);
srcy++) {
for (uint srcx = std::max(0, -x);
srcx < std::min(srcwidth, width - x);
srcx < std::min(src_width, width - x);
srcx++) {
uint dstx = srcx + x;
uint dsty = srcy + y;
uint dstidx = (dsty * width + dstx) * comps;
uint srcidx = (srcy * srcwidth + srcx) * comps;
uint srcidx = (srcy * src_width + srcx) * comps;
for (uint c = 0; c < comps; c++) {
data[dstidx + c] = source[srcidx + c];
}