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/*
* Copyright (C) 2005-2024 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#pragma once
#include "GLShader.h"
#include "rendering/RenderSystem.h"
#include "utils/ColorUtils.h"
#include "utils/Map.h"
#include <map>
#include <memory>
#include <fmt/format.h>
#include "system_gl.h"
enum class ShaderMethodGL
{
SM_DEFAULT = 0,
SM_TEXTURE,
SM_TEXTURE_LIM,
SM_MULTI,
SM_FONTS,
SM_FONTS_SHADER_CLIP,
SM_TEXTURE_NOBLEND,
SM_MULTI_BLENDCOLOR,
SM_MAX
};
template<>
struct fmt::formatter<ShaderMethodGL> : fmt::formatter<std::string_view>
{
template<typename FormatContext>
constexpr auto format(const ShaderMethodGL& shaderMethod, FormatContext& ctx)
{
const auto it = ShaderMethodGLMap.find(shaderMethod);
if (it == ShaderMethodGLMap.cend())
throw std::range_error("no string mapping found for shader method");
return fmt::formatter<string_view>::format(it->second, ctx);
}
private:
static constexpr auto ShaderMethodGLMap = make_map<ShaderMethodGL, std::string_view>({
{ShaderMethodGL::SM_DEFAULT, "default"},
{ShaderMethodGL::SM_TEXTURE, "texture"},
{ShaderMethodGL::SM_TEXTURE_LIM, "texture limited"},
{ShaderMethodGL::SM_MULTI, "multi"},
{ShaderMethodGL::SM_FONTS, "fonts"},
{ShaderMethodGL::SM_FONTS_SHADER_CLIP, "fonts with vertex shader based clipping"},
{ShaderMethodGL::SM_TEXTURE_NOBLEND, "texture no blending"},
{ShaderMethodGL::SM_MULTI_BLENDCOLOR, "multi blend colour"},
});
static_assert(static_cast<size_t>(ShaderMethodGL::SM_MAX) == ShaderMethodGLMap.size(),
"ShaderMethodGLMap doesn't match the size of ShaderMethodGL, did you forget to "
"add/remove a mapping?");
};
class CRenderSystemGL : public CRenderSystemBase
{
public:
CRenderSystemGL();
~CRenderSystemGL() override;
bool InitRenderSystem() override;
bool DestroyRenderSystem() override;
bool ResetRenderSystem(int width, int height) override;
bool BeginRender() override;
bool EndRender() override;
void PresentRender(bool rendered, bool videoLayer) override;
bool ClearBuffers(UTILS::COLOR::Color color) override;
bool IsExtSupported(const char* extension) const override;
void SetVSync(bool vsync);
void ResetVSync() { m_bVsyncInit = false; }
void SetViewPort(const CRect& viewPort) override;
void GetViewPort(CRect& viewPort) override;
bool ScissorsCanEffectClipping() override;
CRect ClipRectToScissorRect(const CRect &rect) override;
void SetScissors(const CRect &rect) override;
void ResetScissors() override;
void CaptureStateBlock() override;
void ApplyStateBlock() override;
void SetCameraPosition(const CPoint &camera, int screenWidth, int screenHeight, float stereoFactor = 0.0f) override;
void SetStereoMode(RENDER_STEREO_MODE mode, RENDER_STEREO_VIEW view) override;
bool SupportsStereo(RENDER_STEREO_MODE mode) const override;
bool SupportsNPOT(bool dxt) const override;
void Project(float &x, float &y, float &z) override;
std::string GetShaderPath(const std::string &filename) override;
void GetGLVersion(int& major, int& minor);
void GetGLSLVersion(int& major, int& minor);
void ResetGLErrors();
// shaders
void EnableShader(ShaderMethodGL method);
void DisableShader();
GLint ShaderGetPos();
GLint ShaderGetCol();
GLint ShaderGetCoord0();
GLint ShaderGetCoord1();
GLint ShaderGetUniCol();
GLint ShaderGetModel();
GLint ShaderGetMatrix();
GLint ShaderGetClip();
GLint ShaderGetCoordStep();
protected:
virtual void SetVSyncImpl(bool enable) = 0;
virtual void PresentRenderImpl(bool rendered) = 0;
void CalculateMaxTexturesize();
void InitialiseShaders();
void ReleaseShaders();
bool m_bVsyncInit = false;
int m_width;
int m_height;
std::string m_RenderExtensions;
int m_glslMajor = 0;
int m_glslMinor = 0;
GLint m_viewPort[4];
std::map<ShaderMethodGL, std::unique_ptr<CGLShader>> m_pShader;
ShaderMethodGL m_method = ShaderMethodGL::SM_DEFAULT;
GLuint m_vertexArray = GL_NONE;
};
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