janwas
836cd08d5e
also: - renamed wdll to delay_load, and wdll_ver to dll_ver - removed empty wcpu This was SVN commit r3751.
220 lines
7.1 KiB
C
Executable File
220 lines
7.1 KiB
C
Executable File
/**
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* =========================================================================
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* File : ogl.h
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* Project : 0 A.D.
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* Description : OpenGL helper functions.
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*
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* @author Jan.Wassenberg@stud.uni-karlsruhe.de
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* =========================================================================
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*/
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/*
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* Copyright (c) 2002-2005 Jan Wassenberg
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*
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* Redistribution and/or modification are also permitted under the
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* terms of the GNU General Public License as published by the
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* Free Software Foundation (version 2 or later, at your option).
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#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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#if OS_WIN
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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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#if OS_MACOSX || OS_MAC
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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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// this must come after GL/gl.h include, so we can't combine the
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// including GL/glext.h.
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#undef GL_GLEXT_PROTOTYPES
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#if OS_MACOSX || OS_MAC
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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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# if OS_WIN
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# include <GL/wglext.h>
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# define GL_TEXTURE_IMAGE_SIZE_ARB 0x86A0
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# endif
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#endif
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// Enums from EXT_framebuffer_object
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#ifndef GL_FRAMEBUFFER_EXT
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#define GL_FRAMEBUFFER_EXT 0x8D40
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#define GL_RENDERBUFFER_EXT 0x8D41
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#define GL_STENCIL_INDEX1_EXT 0x8D46
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#define GL_STENCIL_INDEX4_EXT 0x8D47
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#define GL_STENCIL_INDEX8_EXT 0x8D48
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#define GL_STENCIL_INDEX16_EXT 0x8D49
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#define GL_RENDERBUFFER_WIDTH_EXT 0x8D42
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#define GL_RENDERBUFFER_HEIGHT_EXT 0x8D43
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#define GL_RENDERBUFFER_INTERNAL_FORMAT_EXT 0x8D44
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#define GL_RENDERBUFFER_RED_SIZE_EXT 0x8D50
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#define GL_RENDERBUFFER_GREEN_SIZE_EXT 0x8D51
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#define GL_RENDERBUFFER_BLUE_SIZE_EXT 0x8D52
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#define GL_RENDERBUFFER_ALPHA_SIZE_EXT 0x8D53
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#define GL_RENDERBUFFER_DEPTH_SIZE_EXT 0x8D54
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#define GL_RENDERBUFFER_STENCIL_SIZE_EXT 0x8D55
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#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT 0x8CD0
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#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT 0x8CD1
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#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT 0x8CD2
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#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT 0x8CD3
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#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT 0x8CD4
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#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0
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#define GL_COLOR_ATTACHMENT1_EXT 0x8CE1
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#define GL_COLOR_ATTACHMENT2_EXT 0x8CE2
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#define GL_COLOR_ATTACHMENT3_EXT 0x8CE3
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#define GL_COLOR_ATTACHMENT4_EXT 0x8CE4
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#define GL_COLOR_ATTACHMENT5_EXT 0x8CE5
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#define GL_COLOR_ATTACHMENT6_EXT 0x8CE6
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#define GL_COLOR_ATTACHMENT7_EXT 0x8CE7
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#define GL_COLOR_ATTACHMENT8_EXT 0x8CE8
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#define GL_COLOR_ATTACHMENT9_EXT 0x8CE9
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#define GL_COLOR_ATTACHMENT10_EXT 0x8CEA
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#define GL_COLOR_ATTACHMENT11_EXT 0x8CEB
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#define GL_COLOR_ATTACHMENT12_EXT 0x8CEC
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#define GL_COLOR_ATTACHMENT13_EXT 0x8CED
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#define GL_COLOR_ATTACHMENT14_EXT 0x8CEE
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#define GL_COLOR_ATTACHMENT15_EXT 0x8CEF
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#define GL_DEPTH_ATTACHMENT_EXT 0x8D00
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#define GL_STENCIL_ATTACHMENT_EXT 0x8D20
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#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5
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#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT 0x8CD6
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#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT 0x8CD7
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#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT 0x8CD9
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#define GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT 0x8CDA
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#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT 0x8CDB
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#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT 0x8CDC
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#define GL_FRAMEBUFFER_UNSUPPORTED_EXT 0x8CDD
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#define GL_FRAMEBUFFER_BINDING_EXT 0x8CA6
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#define GL_RENDERBUFFER_BINDING_EXT 0x8CA7
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#define GL_MAX_COLOR_ATTACHMENTS_EXT 0x8CDF
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#define GL_MAX_RENDERBUFFER_SIZE_EXT 0x84E8
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#define GL_INVALID_FRAMEBUFFER_OPERATION_EXT 0x0506
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#endif
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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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#if OS_WIN
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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 *p##name) params;
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#define FUNC2(ret, nameARB, nameCore, version, params) extern ret (CALL_CONV *p##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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// implementation limits / 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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// set sysdep/gfx.h gfx_card and gfx_drv_ver. called by gfx_detect.
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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 LibError 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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//
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// reports a bogus invalid_operation error if called before OpenGL is
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// initialized, so don't!
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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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// ignore and reset the specified error (as returned by glGetError).
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// any other errors that have occurred are reported as oglCheck would.
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//
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// this is useful for suppressing annoying error messages, e.g.
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// "invalid enum" for GL_CLAMP_TO_EDGE even though we've already
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// warned the user that their OpenGL implementation is too old.
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extern void oglSquelchError(GLenum err_to_ignore);
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// call before using any of the above, and after each video 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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