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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef _MY_GL_H
#define _MY_GL_H
#define GLEW_STATIC
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <string>
#if defined(HEADLESS)
#include "lib/headlessStubs/glewstub.h"
#else
#include <GL/glew.h>
#endif // defined(HEADLESS)
// includes boost now!
#include "System/float3.h"
#include "System/float4.h"
#include "glStateDebug.h"
#include "glMarkers.h"
#if defined(HEADLESS)
// All OpenGL functions should always exists on HEADLESS.
// If one does not, we should crash, and it has to be added to glstub.c.
// No runtime check should be performed, or it can be optimized away
// by the compiler.
// This also prevents a compile warning.
#define IS_GL_FUNCTION_AVAILABLE(functionName) true
#else
// Check if the functions address is non-NULL.
#define IS_GL_FUNCTION_AVAILABLE(functionName) (functionName != NULL)
#endif // defined(HEADLESS)
#ifndef GL_INVALID_INDEX
#define GL_INVALID_INDEX -1
#endif
static inline void glVertexf3(const float3& v) { glVertex3f(v.r, v.g, v.b); }
static inline void glColorf3(const float3& v) { glColor3f(v.r, v.g, v.b); }
static inline void glColorf4(const float4& v) { glColor4f(v.r, v.g, v.b, v.a); }
static inline void glNormalf3(const float3& v) { glNormal3f(v.r, v.g, v.b); }
static inline void glTranslatef3(const float3& v) { glTranslatef(v.r, v.g, v.b); }
static inline void glSecondaryColorf3(const float3& v) { glSecondaryColor3f(v.r, v.g, v.b); }
static inline void glColorf4(const float3& v, const float alpha) { glColor4f(v.r, v.g, v.b, alpha); }
static inline void glUniformf3(const GLint location, const float3& v) { glUniform3f(location, v.r, v.g, v.b); }
void WorkaroundATIPointSizeBug();
void SetTexGen(const float& scaleX, const float& scaleZ, const float& offsetX, const float& offsetZ);
void glSaveTexture(const GLuint textureID, const std::string& filename);
void glSpringBindTextures(GLuint first, GLsizei count, const GLuint* textures);
void glSpringTexStorage2D(const GLenum target, GLint levels, const GLint internalFormat, const GLsizei width, const GLsizei height);
void glBuildMipmaps(const GLenum target, GLint internalFormat, const GLsizei width, const GLsizei height, const GLenum format, const GLenum type, const void* data);
void glSpringMatrix2dProj(const int sizex, const int sizey);
void ClearScreen();
bool ProgramStringIsNative(GLenum target, const char* filename);
unsigned int LoadVertexProgram(const char* filename);
unsigned int LoadFragmentProgram(const char* filename);
void glClearErrors();
void glSafeDeleteProgram(GLuint program);
void PrintAvailableResolutions();
void LoadExtensions();
void UnloadExtensions();
class CVertexArray;
CVertexArray* GetVertexArray();
#endif // _MY_GL_H
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