Shader2D.hpp

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#ifndef DONUT_GRAPHICS_SHADER_2D_HPP
#define DONUT_GRAPHICS_SHADER_2D_HPP
 
#include <donut/graphics/ShaderConfiguration.hpp>
#include <donut/graphics/ShaderParameter.hpp>
#include <donut/graphics/ShaderProgram.hpp>
 
namespace donut::graphics {
 
class Renderer; // Forward declaration, to avoid a circular include of Renderer.hpp.
 
struct Shader2DOptions {
    ShaderConfiguration configuration{
        .depthBufferMode = DepthBufferMode::IGNORE,
        .faceCullingMode = FaceCullingMode::IGNORE,
        .alphaMode = AlphaMode::USE_ALPHA_BLENDING,
    };
};
 
class Shader2D {
public:
    static const char* const VERTEX_SHADER_SOURCE_CODE_INSTANCED_TEXTURED_QUAD;
 
    static const char* const FRAGMENT_SHADER_SOURCE_CODE_PLAIN;
 
    static const char* const FRAGMENT_SHADER_SOURCE_CODE_ALPHA;
 
    static Shader2D* const PLAIN;
 
    static Shader2D* const ALPHA;
 
    Shader2DOptions options;
 
    ShaderProgram program;
 
    ShaderParameter projectionMatrix{program, "projectionMatrix"};
 
    ShaderParameter viewMatrix{program, "viewMatrix"};
 
    ShaderParameter viewProjectionMatrix{program, "viewProjectionMatrix"};
 
    ShaderParameter textureUnit{program, "textureUnit"};
 
    Shader2D(const ShaderProgramOptions& programOptions, const Shader2DOptions& options = {})
        : options(options)
        , program(programOptions) {}
 
private:
    friend Renderer;
 
    static void createSharedShaders();
    static void destroySharedShaders() noexcept;
};
 
} // namespace donut::graphics
 
#endif