static constexpr ActivePixelTraits::color_type Import(Color color) {
#ifdef GREYSCALE
return Luminosity8(color.GetLuminosity());
#else
return BGRA8Color(color.Red(), color.Green(), color.Blue(), color.Alpha());
#endif
}
void
Canvas::DrawFilledRectangle(int left, int top, int right, int bottom,
Color color)
{
if (left >= right || top >= bottom)
return;
SDLRasterCanvas canvas(buffer);
const auto raster_color = canvas.Import(color);
if (color.IsOpaque())
canvas.FillRectangle(left, top, right, bottom, raster_color);
else
canvas.FillRectangle(left, top, right, bottom, raster_color,
AlphaPixelOperations<ActivePixelTraits>(color.Alpha()));
}
void GraphicsManager::RenderText (int x, int y, const std::string& text, const Color& color, TTF_Font* font)
{
SDL_Color sdlColor = { color.Red(), color.Green(), color.Blue(), color.Alpha() };
SDL_Surface* surface = nullptr;
SDL_Texture* texture = nullptr;
ScopeGuard guard([&surface, &texture] () {
if (texture != nullptr) { SDL_DestroyTexture(texture); texture = nullptr; }
if (surface != nullptr) { SDL_FreeSurface(surface); surface = nullptr; }
});
surface = TTF_RenderText_Blended(font, text.c_str(), sdlColor);
if (surface == nullptr) throw error::Create("Failed to create surface!", ERROR_LOCATION);
texture = SDL_CreateTextureFromSurface(device, surface);
if (texture == nullptr) throw error::Create("Failed to create texture from surface!", ERROR_LOCATION);
SDL_Rect destRect = { x, y, 0, 0 };
SDL_QueryTexture(texture, nullptr, nullptr, &destRect.w, &destRect.h);
SDL_RenderCopy(device, texture, nullptr, &destRect);
}
sf::Color SfmlConverter::GetSFColor(const Color& color)
{
return sf::Color(color.R(),color.G(),color.B(),color.Alpha());
}
void HostTransferFunction::SetBreakpoint(double s, const Color& c)
{
SetBreakpoint(s, c, c.Alpha());
}
bool operator==(const Color& lhs, const Color& rhs)
{
return lhs.Red() == rhs.Red() && lhs.Green() == rhs.Green() &&
lhs.Blue() == rhs.Blue() && lhs.Alpha() == rhs.Alpha();
}
Color operator*(const Color& lhs, const ElVisFloat& s)
{
Color result(
lhs.Red() * s, lhs.Green() * s, lhs.Blue() * s, lhs.Alpha() * s);
return result;
}
Color operator-(const Color& lhs, const Color& rhs)
{
Color result(lhs.Red() - rhs.Red(), lhs.Green() - rhs.Green(),
lhs.Blue() - rhs.Blue(), lhs.Alpha() - rhs.Alpha());
return result;
}