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Improved visibility of brush, eraser, and selection tools

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This commit is contained in:
Yousef Khadadeh 2026-03-20 16:24:52 +03:00
parent 15e98c6e1f
commit 10ee12254c
5 changed files with 45 additions and 12 deletions
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30
src/CanvasTheme.cpp
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@ -7,6 +7,32 @@
using namespace NetworkingObjects;
const char* visibleBlendModeCode = R"V(
vec4 main(vec4 src, vec4 dst) {
float value = max(max(dst.x, dst.y), dst.z) / dst.a;
vec4 actualSrc;
if(value > 0.6)
actualSrc = vec4(vec3(0.0), src.a);
else
actualSrc = vec4(src.a);
return actualSrc + (1.0 - actualSrc.a) * dst;
}
)V";
sk_sp<SkBlender> CanvasTheme::get_visible_blend_mode() {
static sk_sp<SkBlender> blender = nullptr;
if(!blender) {
auto effect = SkRuntimeEffect::MakeForBlender(SkString(visibleBlendModeCode));
if(!effect.effect) {
std::cout << "[CanvasTheme::get_visible_blend_mode] " << " blender construction error\n";
std::cout << effect.errorText.c_str() << std::endl;
throw std::runtime_error("Shader Compile Failure");
}
blender = effect.effect->makeBlender(nullptr);
}
return blender;
}
CanvasTheme::CanvasTheme(World& w):
world(w)
{}
@ -37,13 +63,11 @@ void CanvasTheme::set_back_color(const Vector3f& newBackColor) {
void CanvasTheme::set_tool_front_color(DrawingProgram& drawP) {
Vector3f newHSV = rgb_to_hsv<Vector3f>(backColor->c);
SkColor4f oldToolFrontColor = toolFrontColor;
if(newHSV.z() >= 0.6f)
toolFrontColor = SkColor4f{0.0f, 0.0f, 0.0f, 1.0f};
else
toolFrontColor = SkColor4f{1.0f, 1.0f, 1.0f, 1.0f};
if(oldToolFrontColor != toolFrontColor)
drawP.drawCache.clear_own_cached_surfaces();
drawP.drawCache.clear_own_cached_surfaces();
}
void CanvasTheme::register_class() {