132 lines
3.0 KiB
C
Executable File
132 lines
3.0 KiB
C
Executable File
#ifndef __OGL_H__
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#define __OGL_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef _WIN32
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#include "sysdep/win/wgl.h"
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#endif
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//
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// bring in the platform's OpenGL headers (with fixes, if necessary)
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//
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#ifdef __APPLE__
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# include <OpenGL/gl.h>
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# include <OpenGL/glu.h>
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#else
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# include <GL/gl.h>
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# include <GL/glu.h>
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#endif
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// if gl.h provides real prototypes for 1.2 / 1.3 functions,
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// exclude the corresponding function pointers in glext_funcs.h
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#ifdef GL_VERSION_1_2
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#define REAL_GL_1_2
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#endif
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#ifdef GL_VERSION_1_3
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#define REAL_GL_1_3
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#endif
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#undef GL_GLEXT_PROTOTYPES
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#ifdef __APPLE__
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# include <OpenGL/glext.h>
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#else
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# include <GL/glext.h>
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# ifdef _WIN32
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# include <GL/wglext.h>
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# endif
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#endif
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#define GL_TEXTURE_IMAGE_SIZE_ARB 0x86A0
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//
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// extensions
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//
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// check if the extension <ext> is supported by the OpenGL implementation.
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// takes subsequently added core support for some extensions into account.
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extern bool oglHaveExtension(const char* ext);
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// check if the OpenGL implementation is at least at <version>.
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// (format: "%d.%d" major minor)
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extern bool oglHaveVersion(const char* version);
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// check if all given extension strings (passed as const char* parameters,
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// terminated by a 0 pointer) are supported by the OpenGL implementation,
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// as determined by oglHaveExtension.
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// returns 0 if all are present; otherwise, the first extension in the
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// list that's not supported (useful for reporting errors).
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//
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// note: dummy parameter is necessary to access parameter va_list.
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//
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// rationale: see source.
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extern const char* oglHaveExtensions(int dummy, ...);
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// return a C string of unspecified length containing a space-separated
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// list of all extensions the OpenGL implementation advertises.
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// (useful for crash logs).
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extern const char* oglExtList(void);
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#ifdef _WIN32
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# define CALL_CONV __stdcall
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#else
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# define CALL_CONV
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#endif
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#define FUNC(ret, name, params) extern ret (CALL_CONV *name) params;
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#define FUNC2(ret, nameARB, nameCore, version, params) extern ret (CALL_CONV *nameARB) params;
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#include "glext_funcs.h"
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#undef FUNC2
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#undef FUNC
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// leave CALL_CONV defined for ogl.cpp
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//
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// limit / feature detect
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//
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extern int ogl_max_tex_size; // [pixels]
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extern int ogl_max_tex_units; // limit on GL_TEXTUREn
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extern int ogl_max_VAR_elements; // GF2: 64K; GF3: 1M
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extern int ogl_tex_compression_supported; // S3TC / DXT{1,3,5}
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// set detect.cpp gfx_card[] and gfx_drv_ver[].
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// (called by detect.cpp get_gfx_info()).
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//
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// fails if OpenGL not ready for use.
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// gfx_card and gfx_drv_ver are unchanged on failure.
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extern int ogl_get_gfx_info(void);
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//
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// misc
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//
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// in non-release builds, enable oglCheck, which breaks into the debugger
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// if an OpenGL error was raised since the last call.
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// add these calls everywhere to close in on the error cause.
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#ifndef NDEBUG
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extern void oglCheck(void);
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#else
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# define oglCheck()
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#endif
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// call before using any of the above, and after each mode change.
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//
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// fails if OpenGL not ready for use.
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extern void oglInit(void);
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#ifdef __cplusplus
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}
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#endif
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#endif // #ifndef __OGL_H__
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