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lxdream.org :: lxdream/src/pvr2/glutil.h
lxdream 0.9.1
released Jun 29
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filename src/pvr2/glutil.h
changeset 1236:d93175c36387
prev1223:61684ca88599
next1245:01e0020adf88
author nkeynes
date Fri Feb 24 21:17:47 2012 +1000 (9 years ago)
permissions -rw-r--r--
last change Factor video_width/video_height out into video_gl.c
Convert immediate-mode bits in video_gl.c into a structure for glDrawArray
Move setOrtho into defineOrthoMatrix in glutil.c
Rearrange various GL settings to keep a consistent state
file annotate diff log raw
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/**
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 * $Id$
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 *
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 * GL-based support functions 
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 *
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 * Copyright (c) 2005 Nathan Keynes.
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 */
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#ifndef lxdream_glutil_H
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#define lxdream_glutil_H
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#include <stdio.h>
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#include "display.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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 * Test if a specific extension is supported. From opengl.org
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 * @param extension extension name to check for
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 * @return TRUE if supported, otherwise FALSE.
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 */
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gboolean isGLExtensionSupported( const char *extension );
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/**
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 * Dump GL information to the output stream, usually for debugging purposes
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 */
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void glPrintInfo( FILE *out );
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/**
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 * Check for a GL error and print a message if there is one
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 * @param context If not null, a string to be printed along side an error message
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 * @return FALSE if there was an error, otherwise TRUE
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 */
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gboolean gl_check_error( const char *context );
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/**
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 * Test if secondary color (GL_COLOR_SUM) is supported.
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 */
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gboolean isGLSecondaryColorSupported();
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gboolean isGLVertexBufferSupported();
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gboolean isGLVertexRangeSupported();
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gboolean isGLPixelBufferSupported();
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gboolean isGLMultitextureSupported();
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gboolean isGLMirroredTextureSupported();
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GLint glGetMaxColourAttachments();
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/****** Extension variant wrangling *****/
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#if defined(GL_MIRRORED_REPEAT_ARB) && !defined(GL_MIRRORED_REPEAT)
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#define GL_MIRRORED_REPEAT GL_MIRRORED_REPEAT_ARB
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#endif
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#if defined(GL_MAX_TEXTURE_UNITS_ARB) && !defined(GL_MAX_TEXTURE_UNITS)
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#define GL_MAX_TEXTURE_UNITS GL_MAX_TEXTURE_UNITS_ARB
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#endif
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#if defined(GL_FRAMEBUFFER_EXT) && !defined(GL_FRAMEBUFFER)
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#define GL_FRAMEBUFFER GL_FRAMEBUFFER_EXT
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#endif
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#if defined(GL_RENDERBUFFER_EXT) && !defined(GL_RENDERBUFFER)
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#define GL_RENDERBUFFER GL_RENDERBUFFER_EXT
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#endif
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#if defined(GL_COLOR_ATTACHMENT0_EXT) && !defined(GL_COLOR_ATTACHMENT0)
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#define GL_COLOR_ATTACHMENT0 GL_COLOR_ATTACHMENT0_EXT
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#endif
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#if defined(GL_MAX_COLOR_ATTACHMENTS_EXT) && !defined(GL_MAX_COLOR_ATTACHMENTS)
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#define GL_MAX_COLOR_ATTACHMENTS GL_MAX_COLOR_ATTACHMENTS_EXT
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#endif
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#if defined(GL_STENCIL_ATTACHMENT_EXT) && !defined(GL_STENCIL_ATTACHMENT)
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#define GL_STENCIL_ATTACHMENT GL_STENCIL_ATTACHMENT_EXT
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#endif
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#if defined(GL_DEPTH_ATTACHMENT_EXT) && !defined(GL_DEPTH_ATTACHMENT)
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#define GL_DEPTH_ATTACHMENT GL_DEPTH_ATTACHMENT_EXT
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#endif
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#if defined(GL_DEPTH_COMPONENT24_OES) && !defined(GL_DEPTH_COMPONENT24)
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#define GL_DEPTH_COMPONENT24 GL_DEPTH_COMPONENT24_OES
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#endif
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#ifndef GL_DEPTH24_STENCIL8
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#if defined(GL_DEPTH24_STENCIL8_EXT)
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#define GL_DEPTH24_STENCIL8 GL_DEPTH24_STENCIL8_EXT
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#elif defined(GL_DEPTH24_STENCIL8_OES)
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#define GL_DEPTH24_STENCIL8 GL_DEPTH24_STENCIL8_OES
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#endif
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#endif
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#if defined(GL_FRAMEBUFFER_COMPLETE_EXT) && !defined(GL_FRAMEBUFFER_COMPLETE)
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#define GL_FRAMEBUFFER_COMPLETE GL_FRAMEBUFFER_COMPLETE_EXT
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#endif
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#if defined(HAVE_OPENGL_FBO_EXT) && !defined(HAVE_OPENGL_FBO)
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#define glGenFramebuffers glGenFramebuffersEXT
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#define glGenRenderbuffers glGenRenderbuffersEXT
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#define glBindFramebuffer glBindFramebufferEXT
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#define glDeleteFramebuffers glDeleteFramebuffersEXT
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#define glDeleteRenderbuffers glDeleteRenderbuffersEXT
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#define glBindFramebuffer glBindFramebufferEXT
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#define glBindRenderbuffer glBindRenderbufferEXT
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#define glRenderbufferStorage glRenderbufferStorageEXT
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#define glFramebufferRenderbuffer glFramebufferRenderbufferEXT
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#define glFramebufferTexture2D glFramebufferTexture2DEXT
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#define glCheckFramebufferStatus glCheckFramebufferStatusEXT
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#endif
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/****** Shader handling (gl_sl.c) *****/
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gboolean glsl_is_supported(void);
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const char *glsl_get_version(void);
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gboolean glsl_load_shaders( );
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void glsl_unload_shaders(void);
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void glsl_clear_shader();
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/* Define an orthographic transform matrix, given the bounding box (assuming origin at 0) */
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void defineOrthoMatrix( GLfloat *matrix, GLfloat width, GLfloat height, GLfloat znear, GLfloat zfar );
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/* Convenience formatting function for driver use */
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void fprint_extensions( FILE *out, const char *extensions );
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#ifdef __cplusplus
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}
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#endif
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#endif /* !lxdream_glutil_H */
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