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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 1256:a9d29fe74bf3
prev1245:01e0020adf88
next1258:f8a9c0fd2abb
author nkeynes
date Sun Mar 04 21:10:12 2012 +1000 (8 years ago)
permissions -rw-r--r--
last change Move glsl loading into common gl code, and set a display capability flag
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     1 /**
     2  * $Id$
     3  *
     4  * GL-based support functions 
     5  *
     6  * Copyright (c) 2005 Nathan Keynes.
     7  *
     8  * This program is free software; you can redistribute it and/or modify
     9  * it under the terms of the GNU General Public License as published by
    10  * the Free Software Foundation; either version 2 of the License, or
    11  * (at your option) any later version.
    12  *
    13  * This program is distributed in the hope that it will be useful,
    14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    16  * GNU General Public License for more details.
    17  */
    19 #ifndef lxdream_glutil_H
    20 #define lxdream_glutil_H
    22 #include <stdio.h>
    23 #include "display.h"
    25 #ifdef __cplusplus
    26 extern "C" {
    27 #endif
    29 /**
    30  * Test if a specific extension is supported. From opengl.org
    31  * @param extension extension name to check for
    32  * @return TRUE if supported, otherwise FALSE.
    33  */
    34 gboolean isGLExtensionSupported( const char *extension );
    36 gboolean isOpenGLES2();
    38 /**
    39  * Dump GL information to the output stream, usually for debugging purposes
    40  */
    41 void glPrintInfo( FILE *out );
    43 /**
    44  * Check for a GL error and print a message if there is one
    45  * @param context If not null, a string to be printed along side an error message
    46  * @return FALSE if there was an error, otherwise TRUE
    47  */
    48 gboolean gl_check_error( const char *context );
    49 /**
    50  * Test if secondary color (GL_COLOR_SUM) is supported.
    51  */
    52 gboolean isGLSecondaryColorSupported();
    54 gboolean isGLVertexBufferSupported();
    55 gboolean isGLVertexRangeSupported();
    56 gboolean isGLPixelBufferSupported();
    57 gboolean isGLMultitextureSupported();
    58 gboolean isGLMirroredTextureSupported();
    59 GLint glGetMaxColourAttachments();
    61 /****** Extension variant wrangling *****/
    63 #if defined(GL_MIRRORED_REPEAT_ARB) && !defined(GL_MIRRORED_REPEAT)
    64 #define GL_MIRRORED_REPEAT GL_MIRRORED_REPEAT_ARB
    65 #endif
    67 #if defined(GL_MAX_TEXTURE_UNITS_ARB) && !defined(GL_MAX_TEXTURE_UNITS)
    68 #define GL_MAX_TEXTURE_UNITS GL_MAX_TEXTURE_UNITS_ARB
    69 #endif
    71 #if defined(GL_FRAMEBUFFER_EXT) && !defined(GL_FRAMEBUFFER)
    72 #define GL_FRAMEBUFFER GL_FRAMEBUFFER_EXT
    73 #endif
    75 #if defined(GL_RENDERBUFFER_EXT) && !defined(GL_RENDERBUFFER)
    76 #define GL_RENDERBUFFER GL_RENDERBUFFER_EXT
    77 #endif
    79 #if defined(GL_COLOR_ATTACHMENT0_EXT) && !defined(GL_COLOR_ATTACHMENT0)
    80 #define GL_COLOR_ATTACHMENT0 GL_COLOR_ATTACHMENT0_EXT
    81 #endif
    83 #if defined(GL_MAX_COLOR_ATTACHMENTS_EXT) && !defined(GL_MAX_COLOR_ATTACHMENTS)
    84 #define GL_MAX_COLOR_ATTACHMENTS GL_MAX_COLOR_ATTACHMENTS_EXT
    85 #endif
    87 #if defined(GL_STENCIL_ATTACHMENT_EXT) && !defined(GL_STENCIL_ATTACHMENT)
    88 #define GL_STENCIL_ATTACHMENT GL_STENCIL_ATTACHMENT_EXT
    89 #endif
    91 #if defined(GL_DEPTH_ATTACHMENT_EXT) && !defined(GL_DEPTH_ATTACHMENT)
    92 #define GL_DEPTH_ATTACHMENT GL_DEPTH_ATTACHMENT_EXT
    93 #endif
    95 #if defined(GL_DEPTH_COMPONENT24_OES) && !defined(GL_DEPTH_COMPONENT24)
    96 #define GL_DEPTH_COMPONENT24 GL_DEPTH_COMPONENT24_OES
    97 #endif
    99 #ifndef GL_DEPTH24_STENCIL8
   100 #if defined(GL_DEPTH24_STENCIL8_EXT)
   101 #define GL_DEPTH24_STENCIL8 GL_DEPTH24_STENCIL8_EXT
   102 #elif defined(GL_DEPTH24_STENCIL8_OES)
   103 #define GL_DEPTH24_STENCIL8 GL_DEPTH24_STENCIL8_OES
   104 #endif
   105 #endif
   107 #if defined(GL_FRAMEBUFFER_COMPLETE_EXT) && !defined(GL_FRAMEBUFFER_COMPLETE)
   108 #define GL_FRAMEBUFFER_COMPLETE GL_FRAMEBUFFER_COMPLETE_EXT
   109 #endif
   111 #if defined(GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT) && !defined(GL_UNSIGNED_SHORT_1_5_5_5_REV)
   112 #define GL_UNSIGNED_SHORT_1_5_5_5_REV GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT
   113 #endif
   115 #if defined(GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT) && !defined(GL_UNSIGNED_SHORT_4_4_4_4_REV)
   116 #define GL_UNSIGNED_SHORT_4_4_4_4_REV GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT
   117 #endif
   119 #if defined(GL_BGRA_EXT) && !defined(GL_BGRA)
   120 #define GL_BGRA GL_BGRA_EXT
   121 #endif
   123 #if defined(HAVE_OPENGL_FBO_EXT) && !defined(HAVE_OPENGL_FBO)
   124 #define glGenFramebuffers glGenFramebuffersEXT
   125 #define glGenRenderbuffers glGenRenderbuffersEXT
   126 #define glBindFramebuffer glBindFramebufferEXT
   127 #define glDeleteFramebuffers glDeleteFramebuffersEXT
   128 #define glDeleteRenderbuffers glDeleteRenderbuffersEXT
   129 #define glBindFramebuffer glBindFramebufferEXT
   130 #define glBindRenderbuffer glBindRenderbufferEXT
   131 #define glRenderbufferStorage glRenderbufferStorageEXT
   132 #define glFramebufferRenderbuffer glFramebufferRenderbufferEXT
   133 #define glFramebufferTexture2D glFramebufferTexture2DEXT
   134 #define glCheckFramebufferStatus glCheckFramebufferStatusEXT
   135 #endif
   138 /****** Shader handling (gl_sl.c) *****/
   139 gboolean glsl_init( display_driver_t driver );
   140 gboolean glsl_is_supported(void);
   141 const char *glsl_get_version(void);
   142 gboolean glsl_load_shaders( );
   143 void glsl_unload_shaders(void);
   144 void glsl_clear_shader();
   146 /* Define an orthographic transform matrix, given the bounding box (assuming origin at 0) */
   147 void defineOrthoMatrix( GLfloat *matrix, GLfloat width, GLfloat height, GLfloat znear, GLfloat zfar );
   149 /* Convenience formatting function for driver use */
   150 void fprint_extensions( FILE *out, const char *extensions );
   152 #ifdef __cplusplus
   153 }
   154 #endif
   156 #endif /* !lxdream_glutil_H */
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