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Add GuiImage:setBlendMode

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Signed-off-by: Thomas Rohloff <v10lator@myway.de>
This commit is contained in:
Thomas Rohloff 2021-07-18 08:10:57 +02:00
parent e61d10c828
commit 37550b59d4
2 changed files with 23 additions and 0 deletions
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5
include/gui-sdl/gui/GuiImage.h
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@ -41,10 +41,15 @@ public:
void setTexture(GuiTextureData *tex);
int setBlendMode(SDL_BlendMode blendMode);
private:
GuiTextureData *texture = nullptr;
bool freeTextureData = false;
// Color of the rect that's drawn if the picture has no texture.
SDL_Color color = {0, 0, 0, 0};
protected:
SDL_BlendMode blendMode;
};

18
source/gui/GuiImage.cpp
View File

@ -47,11 +47,24 @@ void GuiImage::draw(Renderer *renderer) {
if (texture) {
texture->draw(renderer, rect, getAngle());
} else {
// copy the texture to the rendering context
SDL_BlendMode mode;
SDL_GetRenderDrawBlendMode(renderer->getRenderer(), &mode);
// adjust blend mode
if(blendMode != mode){
SDL_SetRenderDrawBlendMode(renderer->getRenderer(), blendMode);
}
SDL_SetRenderDrawColor(renderer->getRenderer(), color.r, color.g, color.b, color.a);
SDL_RenderFillRect(renderer->getRenderer(), &rect);
if(getAngle() != 0.0f){
LG_Log("Drawing a rotated rect is not supported yet");
}
if(blendMode != mode){
SDL_SetRenderDrawBlendMode(renderer->getRenderer(), mode);
}
}
}
@ -64,3 +77,8 @@ void GuiImage::setTexture(GuiTextureData *tex) {
this->setSize(tex->getWidth(), tex->getHeight());
}
}
int GuiImage::setBlendMode(SDL_BlendMode blendMode) {
this->blendMode = blendMode;
return this->texture ? this->texture->setBlendMode(blendMode) : 0;
}