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add canvas:sub method

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This commit is contained in:
MihailRis 2025-11-11 19:34:40 +03:00
parent 83f7bf80c4
commit 34d13442b6
5 changed files with 25 additions and 8 deletions
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8
src/graphics/core/ImageData.cpp
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@ -448,7 +448,7 @@ void ImageData::mulColor(const glm::ivec4& color) {
}
}
void ImageData::addColor(const ImageData& other) {
void ImageData::addColor(const ImageData& other, int multiplier) {
check_matching(*this, other);
uint comps;
@ -462,7 +462,7 @@ void ImageData::addColor(const ImageData& other) {
for (uint x = 0; x < width; x++) {
uint idx = (y * width + x) * comps;
for (uint c = 0; c < comps; c++) {
int val = data[idx + c] + other.data[idx + c];
int val = data[idx + c] + other.data[idx + c] * multiplier;
data[idx + c] =
static_cast<ubyte>(std::min(std::max(val, 0), 255));
}
@ -470,7 +470,7 @@ void ImageData::addColor(const ImageData& other) {
}
}
void ImageData::addColor(const glm::ivec4& color) {
void ImageData::addColor(const glm::ivec4& color, int multiplier) {
uint comps;
switch (format) {
case ImageFormat::rgb888: comps = 3; break;
@ -482,7 +482,7 @@ void ImageData::addColor(const glm::ivec4& color) {
for (uint x = 0; x < width; x++) {
uint idx = (y * width + x) * comps;
for (uint c = 0; c < comps; c++) {
int val = data[idx + c] + color[c];
int val = data[idx + c] + color[c] * multiplier;
data[idx + c] =
static_cast<ubyte>(std::min(std::max(val, 0), 255));
}