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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 1287:dac8f363f1fe
prev1282:9f445c5e252b
author nkeynes
date Fri May 29 18:47:05 2015 +1000 (7 years ago)
permissions -rw-r--r--
last change Fix test case
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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 gboolean isGLBGRATextureSupported();
    60 gboolean isGLShaderSupported();
    61 GLint glGetMaxColourAttachments();
    63 /**
    64  * Wrapper function for glTexImage2D calls that may have BGRA data - on systems
    65  * where this isn't directly supported, swizzle the data into an acceptable RGBA
    66  * equivalent. If preserveData is true, data will not be modified - otherwise
    67  * the method may swizzle data in-place.
    68  */
    69 void glTexImage2DBGRA( int level, GLint intFormat, int width, int height, GLint format, GLint type, unsigned char *data, int preserveData );
    70 void glTexSubImage2DBGRA( int level, int xoff, int yoff, int width, int height, GLint format, GLint type, unsigned char *data, int preserveData );
    72 /****** Extension variant wrangling *****/
    74 #if defined(GL_MIRRORED_REPEAT_ARB) && !defined(GL_MIRRORED_REPEAT)
    75 #define GL_MIRRORED_REPEAT GL_MIRRORED_REPEAT_ARB
    76 #endif
    78 #if defined(GL_MAX_TEXTURE_UNITS_ARB) && !defined(GL_MAX_TEXTURE_UNITS)
    79 #define GL_MAX_TEXTURE_UNITS GL_MAX_TEXTURE_UNITS_ARB
    80 #endif
    82 #if defined(GL_FRAMEBUFFER_EXT) && !defined(GL_FRAMEBUFFER)
    83 #define GL_FRAMEBUFFER GL_FRAMEBUFFER_EXT
    84 #endif
    86 #if defined(GL_RENDERBUFFER_EXT) && !defined(GL_RENDERBUFFER)
    87 #define GL_RENDERBUFFER GL_RENDERBUFFER_EXT
    88 #endif
    90 #if defined(GL_COLOR_ATTACHMENT0_EXT) && !defined(GL_COLOR_ATTACHMENT0)
    91 #define GL_COLOR_ATTACHMENT0 GL_COLOR_ATTACHMENT0_EXT
    92 #endif
    94 #if defined(GL_MAX_COLOR_ATTACHMENTS_EXT) && !defined(GL_MAX_COLOR_ATTACHMENTS)
    95 #define GL_MAX_COLOR_ATTACHMENTS GL_MAX_COLOR_ATTACHMENTS_EXT
    96 #endif
    98 #if defined(GL_STENCIL_ATTACHMENT_EXT) && !defined(GL_STENCIL_ATTACHMENT)
    99 #define GL_STENCIL_ATTACHMENT GL_STENCIL_ATTACHMENT_EXT
   100 #endif
   102 #if defined(GL_DEPTH_ATTACHMENT_EXT) && !defined(GL_DEPTH_ATTACHMENT)
   103 #define GL_DEPTH_ATTACHMENT GL_DEPTH_ATTACHMENT_EXT
   104 #endif
   106 #if defined(GL_DEPTH_COMPONENT24_OES) && !defined(GL_DEPTH_COMPONENT24)
   107 #define GL_DEPTH_COMPONENT24 GL_DEPTH_COMPONENT24_OES
   108 #endif
   110 #ifndef GL_DEPTH24_STENCIL8
   111 #if defined(GL_DEPTH24_STENCIL8_EXT)
   112 #define GL_DEPTH24_STENCIL8 GL_DEPTH24_STENCIL8_EXT
   113 #elif defined(GL_DEPTH24_STENCIL8_OES)
   114 #define GL_DEPTH24_STENCIL8 GL_DEPTH24_STENCIL8_OES
   115 #endif
   116 #endif
   118 #if defined(GL_FRAMEBUFFER_COMPLETE_EXT) && !defined(GL_FRAMEBUFFER_COMPLETE)
   119 #define GL_FRAMEBUFFER_COMPLETE GL_FRAMEBUFFER_COMPLETE_EXT
   120 #endif
   122 #if defined(GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT) && !defined(GL_UNSIGNED_SHORT_1_5_5_5_REV)
   123 #define GL_UNSIGNED_SHORT_1_5_5_5_REV GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT
   124 #endif
   126 #if defined(GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT) && !defined(GL_UNSIGNED_SHORT_4_4_4_4_REV)
   127 #define GL_UNSIGNED_SHORT_4_4_4_4_REV GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT
   128 #endif
   130 #if defined(GL_BGRA_EXT) && !defined(GL_BGRA)
   131 #define GL_BGRA GL_BGRA_EXT
   132 #endif
   134 #if defined(GL_SHADING_LANGUAGE_VERSION_ARB) && !defined(GL_SHADING_LANGUAGE_VERSION)
   135 #define GL_SHADING_LANGUAGE_VERSION GL_SHADING_LANGUAGE_VERSION_ARB
   136 #endif
   139 #if defined(HAVE_OPENGL_FBO_EXT) && !defined(HAVE_OPENGL_FBO)
   140 #define glGenFramebuffers glGenFramebuffersEXT
   141 #define glGenRenderbuffers glGenRenderbuffersEXT
   142 #define glBindFramebuffer glBindFramebufferEXT
   143 #define glDeleteFramebuffers glDeleteFramebuffersEXT
   144 #define glDeleteRenderbuffers glDeleteRenderbuffersEXT
   145 #define glBindFramebuffer glBindFramebufferEXT
   146 #define glBindRenderbuffer glBindRenderbufferEXT
   147 #define glRenderbufferStorage glRenderbufferStorageEXT
   148 #define glFramebufferRenderbuffer glFramebufferRenderbufferEXT
   149 #define glFramebufferTexture2D glFramebufferTexture2DEXT
   150 #define glCheckFramebufferStatus glCheckFramebufferStatusEXT
   151 #endif
   153 /* Define an orthographic transform matrix, given the bounding box (assuming origin at 0) */
   154 void defineOrthoMatrix( GLfloat *matrix, GLfloat width, GLfloat height, GLfloat znear, GLfloat zfar );
   156 /* Convenience formatting function for driver use */
   157 void fprint_extensions( FILE *out, const char *extensions );
   159 /****** Texture formats (missing definitions) *****/
   161 #ifndef GL_UNSIGNED_SHORT_4_4_4_4_REV
   162 #define GL_UNSIGNED_SHORT_4_4_4_4_REV 0x8365
   163 #endif
   165 #ifndef GL_UNSIGNED_SHORT_1_5_5_5_REV
   166 #define GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366
   167 #endif
   169 #ifndef GL_BGRA
   170 #define GL_BGRA 0x80E1
   171 #endif
   173 #ifdef __cplusplus
   174 }
   175 #endif
   177 #endif /* !lxdream_glutil_H */
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