gzdoom/src/gl/system/gl_interface.h

#ifndef R_RENDER
#define R_RENDER

#if defined(__APPLE__)
#define APIENTRY
#define APIENTRYP *
#endif // __APPLE__

#include "basictypes.h"
#ifndef _WIN32
typedef bool BOOL;
#endif

#ifndef PFNGLMULTITEXCOORD2FPROC
typedef void (APIENTRYP PFNGLMULTITEXCOORD2FPROC) (GLenum target, GLfloat s, GLfloat t);
#endif
#ifndef PFNGLMULTITEXCOORD2FVPROC
typedef void (APIENTRYP PFNGLMULTITEXCOORD2FVPROC) (GLenum target, const GLfloat *v);
#endif

enum RenderFlags
{
	RFL_NPOT_TEXTURE=1,
	RFL_OCCLUSION_QUERY=4,
	// [BB] Added texture compression flags.
	RFL_TEXTURE_COMPRESSION=8,
	RFL_TEXTURE_COMPRESSION_S3TC=16,

	RFL_VBO = 32,
	RFL_MAP_BUFFER_RANGE = 64,
	RFL_FRAMEBUFFER = 128,
	RFL_TEXTUREBUFFER = 256,
	RFL_NVIDIA = 512,
	RFL_ATI = 1024,


	RFL_GL_20 = 0x10000000,
	RFL_GL_21 = 0x20000000,
	RFL_GL_30 = 0x40000000,
};

enum TexMode
{
	TMF_MASKBIT = 1,
	TMF_OPAQUEBIT = 2,
	TMF_INVERTBIT = 4,

	TM_MODULATE = 0,
	TM_MASK = TMF_MASKBIT,
	TM_OPAQUE = TMF_OPAQUEBIT,
	TM_INVERT = TMF_INVERTBIT,
	//TM_INVERTMASK = TMF_MASKBIT | TMF_INVERTBIT
	TM_INVERTOPAQUE = TMF_INVERTBIT | TMF_OPAQUEBIT,
};

struct RenderContext
{
	unsigned int flags;
	unsigned int shadermodel;
	unsigned int maxuniforms;
	int max_texturesize;
	char * vendorstring;

	int MaxLights() const
	{
		return maxuniforms>=2048? 128:64;
	}

	void (APIENTRY * BlendEquation) (GLenum);

	// ARB_SHADER_OBJECTS
	PFNGLDELETESHADERPROC DeleteShader;
	PFNGLDELETEPROGRAMPROC DeleteProgram;
	PFNGLDETACHSHADERPROC DetachShader;
	PFNGLCREATESHADERPROC CreateShader;
	PFNGLSHADERSOURCEPROC ShaderSource;
	PFNGLCOMPILESHADERPROC CompileShader;
	PFNGLCREATEPROGRAMPROC CreateProgram;
	PFNGLATTACHSHADERPROC AttachShader;
	PFNGLLINKPROGRAMPROC LinkProgram;
	PFNGLUSEPROGRAMPROC UseProgram;
	PFNGLVALIDATEPROGRAMPROC ValidateProgram;
	PFNGLVERTEXATTRIB1FPROC VertexAttrib1f;
	PFNGLVERTEXATTRIB2FPROC VertexAttrib2f;
	PFNGLVERTEXATTRIB4FPROC VertexAttrib4f;
	PFNGLVERTEXATTRIB2FVPROC VertexAttrib2fv;
	PFNGLVERTEXATTRIB3FVPROC VertexAttrib3fv;
	PFNGLVERTEXATTRIB4FVPROC VertexAttrib4fv;
	PFNGLVERTEXATTRIB4UBVPROC VertexAttrib4ubv;
	PFNGLGETATTRIBLOCATIONPROC GetAttribLocation;
	PFNGLBINDATTRIBLOCATIONPROC BindAttribLocation;

	PFNGLUNIFORM1FPROC Uniform1f;
	PFNGLUNIFORM2FPROC Uniform2f;
	PFNGLUNIFORM3FPROC Uniform3f;
	PFNGLUNIFORM4FPROC Uniform4f;
	PFNGLUNIFORM1IPROC Uniform1i;
	PFNGLUNIFORM2IPROC Uniform2i;
	PFNGLUNIFORM3IPROC Uniform3i;
	PFNGLUNIFORM4IPROC Uniform4i;
	PFNGLUNIFORM1FVPROC Uniform1fv;
	PFNGLUNIFORM2FVPROC Uniform2fv;
	PFNGLUNIFORM3FVPROC Uniform3fv;
	PFNGLUNIFORM4FVPROC Uniform4fv;
	PFNGLUNIFORM1IVPROC Uniform1iv;
	PFNGLUNIFORM2IVPROC Uniform2iv;
	PFNGLUNIFORM3IVPROC Uniform3iv;
	PFNGLUNIFORM4IVPROC Uniform4iv;

	PFNGLUNIFORMMATRIX2FVPROC UniformMatrix2fv;
	PFNGLUNIFORMMATRIX3FVPROC UniformMatrix3fv;
	PFNGLUNIFORMMATRIX4FVPROC UniformMatrix4fv;

	PFNGLGETSHADERINFOLOGPROC GetShaderInfoLog;
	PFNGLGETPROGRAMINFOLOGPROC GetProgramInfoLog;
	PFNGLGETUNIFORMLOCATIONPROC GetUniformLocation;
	PFNGLGETACTIVEUNIFORMPROC GetActiveUniform;
	PFNGLGETUNIFORMFVPROC GetUniformfv;
	PFNGLGETUNIFORMIVPROC GetUniformiv;
	PFNGLGETSHADERSOURCEPROC GetShaderSource;
	PFNGLGETOBJECTPARAMETERIVARBPROC GetObjectParameteriv;
	
	PFNGLGENQUERIESARBPROC GenQueries;
	PFNGLDELETEQUERIESARBPROC DeleteQueries;
	PFNGLBEGINQUERYARBPROC BeginQuery;
	PFNGLENDQUERYARBPROC EndQuery;
	PFNGLGETQUERYOBJECTUIVARBPROC GetQueryObjectuiv;

	PFNGLACTIVETEXTUREPROC ActiveTexture;
	PFNGLMULTITEXCOORD2FPROC MultiTexCoord2f;
	PFNGLMULTITEXCOORD2FVPROC MultiTexCoord2fv;

	PFNGLBINDBUFFERPROC BindBuffer;
	PFNGLDELETEBUFFERSPROC DeleteBuffers;
	PFNGLGENBUFFERSPROC GenBuffers;
	PFNGLBUFFERDATAPROC BufferData;
	PFNGLBUFFERSUBDATAPROC BufferSubData;
	PFNGLMAPBUFFERPROC MapBuffer;
	PFNGLUNMAPBUFFERPROC UnmapBuffer;
	PFNGLENABLEVERTEXATTRIBARRAYPROC EnableVertexAttribArray;
	PFNGLDISABLEVERTEXATTRIBARRAYPROC DisableVertexAttribArray;
	PFNGLVERTEXATTRIBPOINTERPROC VertexAttribPointer;

	PFNGLMAPBUFFERRANGEPROC MapBufferRange;
	PFNGLFLUSHMAPPEDBUFFERRANGEPROC FlushMappedBufferRange;

	PFNGLGENFRAMEBUFFERSPROC GenFramebuffers;
	PFNGLDELETEFRAMEBUFFERSPROC DeleteFramebuffers;
	PFNGLBINDFRAMEBUFFERPROC BindFramebuffer;
	PFNGLFRAMEBUFFERTEXTURE2DPROC FramebufferTexture2D;
	PFNGLGENRENDERBUFFERSPROC GenRenderbuffers;
	PFNGLDELETERENDERBUFFERSPROC DeleteRenderbuffers;
	PFNGLBINDRENDERBUFFERPROC BindRenderbuffer;
	PFNGLRENDERBUFFERSTORAGEPROC RenderbufferStorage;
	PFNGLFRAMEBUFFERRENDERBUFFERPROC FramebufferRenderbuffer;

	PFNGLTEXBUFFERARBPROC TexBufferARB;
};


#endif