nkeynes@635 | 1 | /**
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nkeynes@636 | 2 | * $Id$
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nkeynes@635 | 3 | *
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nkeynes@635 | 4 | * GL-based support functions
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nkeynes@635 | 5 | *
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nkeynes@635 | 6 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@635 | 7 | *
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nkeynes@635 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@635 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@635 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@635 | 11 | * (at your option) any later version.
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nkeynes@635 | 12 | *
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nkeynes@635 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@635 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@635 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@635 | 16 | * GNU General Public License for more details.
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nkeynes@635 | 17 | */
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nkeynes@736 | 18 |
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nkeynes@645 | 19 | #include <string.h>
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nkeynes@1129 | 20 | #include <stdlib.h>
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nkeynes@687 | 21 | #include <glib/gstrfuncs.h>
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nkeynes@635 | 22 | #include "pvr2/glutil.h"
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nkeynes@635 | 23 |
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nkeynes@667 | 24 | gboolean isGLSecondaryColorSupported()
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nkeynes@667 | 25 | {
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nkeynes@736 | 26 | return isGLExtensionSupported("GL_EXT_secondary_color");
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nkeynes@667 | 27 | }
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nkeynes@667 | 28 |
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nkeynes@667 | 29 | gboolean isGLVertexBufferSupported()
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nkeynes@667 | 30 | {
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nkeynes@736 | 31 | return isGLExtensionSupported("GL_ARB_vertex_buffer_object");
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nkeynes@667 | 32 | }
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nkeynes@667 | 33 |
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nkeynes@667 | 34 | gboolean isGLPixelBufferSupported()
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nkeynes@667 | 35 | {
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nkeynes@736 | 36 | return isGLExtensionSupported("GL_ARB_pixel_buffer_object");
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nkeynes@667 | 37 | }
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nkeynes@667 | 38 |
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nkeynes@667 | 39 | gboolean isGLMirroredTextureSupported()
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nkeynes@667 | 40 | {
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nkeynes@736 | 41 | return isGLExtensionSupported("GL_ARB_texture_mirrored_repeat");
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nkeynes@667 | 42 | }
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nkeynes@667 | 43 |
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nkeynes@1140 | 44 | /**
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nkeynes@1140 | 45 | * Check if there's at least 2 texture units
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nkeynes@1140 | 46 | */
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nkeynes@1140 | 47 | gboolean isGLMultitextureSupported()
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nkeynes@1140 | 48 | {
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nkeynes@1140 | 49 | if( !isGLExtensionSupported("GL_ARB_multitexture") )
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nkeynes@1140 | 50 | return FALSE;
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nkeynes@1140 | 51 | int units = 0;
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nkeynes@1140 | 52 | glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &units);
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nkeynes@1140 | 53 | return units >= 2;
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nkeynes@1140 | 54 | }
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nkeynes@1140 | 55 |
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nkeynes@1134 | 56 | gboolean isGLVertexRangeSupported()
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nkeynes@1134 | 57 | {
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nkeynes@1134 | 58 | return isGLExtensionSupported("GL_APPLE_vertex_array_range") ||
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nkeynes@1134 | 59 | isGLExtensionSupported("GL_NV_vertex_array_range");
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nkeynes@1134 | 60 | }
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nkeynes@1134 | 61 |
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nkeynes@635 | 62 | /**
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nkeynes@635 | 63 | * Test if a specific extension is supported. From opengl.org
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nkeynes@635 | 64 | * @param extension extension name to check for
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nkeynes@635 | 65 | * @return TRUE if supported, otherwise FALSE.
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nkeynes@635 | 66 | */
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nkeynes@635 | 67 | gboolean isGLExtensionSupported( const char *extension )
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nkeynes@635 | 68 | {
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nkeynes@635 | 69 | const GLubyte *extensions = NULL;
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nkeynes@635 | 70 | const GLubyte *start;
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nkeynes@635 | 71 | GLubyte *where, *terminator;
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nkeynes@635 | 72 |
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nkeynes@635 | 73 | /* Extension names should not have spaces. */
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nkeynes@635 | 74 | where = (GLubyte *) strchr(extension, ' ');
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nkeynes@635 | 75 | if (where || *extension == '\0')
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nkeynes@736 | 76 | return 0;
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nkeynes@635 | 77 | extensions = glGetString(GL_EXTENSIONS);
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nkeynes@645 | 78 | if( extensions == NULL ) {
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nkeynes@736 | 79 | /* No GL available, so we're pretty sure the extension isn't
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nkeynes@736 | 80 | * available either. */
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nkeynes@736 | 81 | return FALSE;
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nkeynes@645 | 82 | }
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nkeynes@635 | 83 | /* It takes a bit of care to be fool-proof about parsing the
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nkeynes@635 | 84 | OpenGL extensions string. Don't be fooled by sub-strings,
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nkeynes@635 | 85 | etc. */
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nkeynes@635 | 86 | start = extensions;
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nkeynes@635 | 87 | for (;;) {
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nkeynes@736 | 88 | where = (GLubyte *) strstr((const char *) start, extension);
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nkeynes@736 | 89 | if (!where)
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nkeynes@736 | 90 | break;
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nkeynes@736 | 91 | terminator = where + strlen(extension);
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nkeynes@736 | 92 | if (where == start || *(where - 1) == ' ')
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nkeynes@736 | 93 | if (*terminator == ' ' || *terminator == '\0')
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nkeynes@736 | 94 | return TRUE;
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nkeynes@736 | 95 | start = terminator;
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nkeynes@635 | 96 | }
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nkeynes@635 | 97 | return FALSE;
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nkeynes@635 | 98 | }
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nkeynes@687 | 99 |
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nkeynes@1129 | 100 | int compare_charp( const void *a, const void *b )
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nkeynes@1129 | 101 | {
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nkeynes@1129 | 102 | const char **ca = (const char **)a;
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nkeynes@1129 | 103 | const char **cb = (const char **)b;
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nkeynes@1129 | 104 | return strcmp(*ca, *cb);
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nkeynes@1129 | 105 | }
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nkeynes@1129 | 106 |
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nkeynes@1134 | 107 | #define DEFAULT_TERMINAL_COLUMNS 80
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nkeynes@1134 | 108 | #define DEFAULT_COLUMN_WIDTH 34
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nkeynes@1134 | 109 |
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nkeynes@1134 | 110 | /**
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nkeynes@1134 | 111 | * Format a GL extension list (or other space-separated string) nicely, and
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nkeynes@1134 | 112 | * print to the given output stream.
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nkeynes@1134 | 113 | */
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nkeynes@1134 | 114 |
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nkeynes@1134 | 115 | void fprint_extensions( FILE *out, const char *extensions )
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nkeynes@687 | 116 | {
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nkeynes@1134 | 117 | unsigned int i, j, count, maxlen = DEFAULT_COLUMN_WIDTH, columns, per_column, terminal_columns;
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nkeynes@1134 | 118 | const char *terminal_columns_str = getenv("COLUMNS");
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nkeynes@1134 | 119 | if( terminal_columns_str == NULL || (terminal_columns = strtol(terminal_columns_str,0,10)) == 0 )
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nkeynes@1134 | 120 | terminal_columns = DEFAULT_TERMINAL_COLUMNS;
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nkeynes@1129 | 121 |
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nkeynes@1134 | 122 | if( extensions == NULL || extensions[0] == '\0' )
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nkeynes@1134 | 123 | return;
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nkeynes@1134 | 124 |
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nkeynes@1134 | 125 | gchar *ext_dup = g_strdup(extensions);
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nkeynes@1134 | 126 | gchar **ext_split = g_strsplit(g_strstrip(extensions), " ", 0);
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nkeynes@1134 | 127 | for( count = 0; ext_split[count] != NULL; count++ ) {
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nkeynes@1134 | 128 | unsigned len = strlen(ext_split[count]);
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nkeynes@1134 | 129 | if( len > maxlen )
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nkeynes@1134 | 130 | maxlen = len;
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nkeynes@1134 | 131 | }
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nkeynes@1134 | 132 |
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nkeynes@1134 | 133 | columns = terminal_columns / (maxlen+2);
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nkeynes@1134 | 134 | if( columns == 0 )
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nkeynes@1134 | 135 | columns = 1;
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nkeynes@1134 | 136 | per_column = (count+columns-1) / columns;
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nkeynes@1129 | 137 |
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nkeynes@1129 | 138 | qsort(ext_split, count, sizeof(gchar *), compare_charp);
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nkeynes@736 | 139 |
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nkeynes@1134 | 140 | for( i=0; i<per_column; i++ ) {
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nkeynes@1134 | 141 | for( j=0; j<columns; j++ ) {
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nkeynes@1134 | 142 | unsigned idx = i + (j*per_column);
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nkeynes@1134 | 143 | if( idx < count )
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nkeynes@1134 | 144 | fprintf( out, " %-*s", maxlen, ext_split[idx] );
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nkeynes@1134 | 145 | }
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nkeynes@1134 | 146 | fprintf( out, "\n" );
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nkeynes@1134 | 147 | }
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nkeynes@1134 | 148 | g_strfreev(ext_split);
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nkeynes@1134 | 149 | g_free(ext_dup);
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nkeynes@1134 | 150 | }
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nkeynes@1134 | 151 |
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nkeynes@1134 | 152 | void glPrintInfo( FILE *out )
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nkeynes@1134 | 153 | {
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nkeynes@687 | 154 | fprintf( out, "GL Vendor: %s\n", glGetString(GL_VENDOR) );
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nkeynes@687 | 155 | fprintf( out, "GL Renderer: %s\n", glGetString(GL_RENDERER) );
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nkeynes@687 | 156 | fprintf( out, "GL Version: %s\n", glGetString(GL_VERSION) );
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nkeynes@1134 | 157 | if( glsl_is_supported() ) {
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nkeynes@1134 | 158 | const char * version = glsl_get_version();
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nkeynes@1134 | 159 | fprintf( out, "SL Version: %s\n", version );
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nkeynes@1134 | 160 | }
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nkeynes@736 | 161 |
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nkeynes@1134 | 162 | fprintf( out, "GL Extensions:\n" );
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nkeynes@1134 | 163 |
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nkeynes@1134 | 164 | fprint_extensions( out, (const gchar *)glGetString(GL_EXTENSIONS) );
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nkeynes@1134 | 165 | if( display_driver && display_driver->print_info ) {
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nkeynes@1134 | 166 | fprintf( out, "\n");
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nkeynes@1134 | 167 | display_driver->print_info(out);
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nkeynes@687 | 168 | }
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nkeynes@687 | 169 | }
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nkeynes@1150 | 170 |
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nkeynes@1150 | 171 | gboolean gl_check_error(const char *context)
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nkeynes@1150 | 172 | {
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nkeynes@1150 | 173 | GLint err = glGetError();
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nkeynes@1150 | 174 | if( err != 0 ) {
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nkeynes@1150 | 175 | const char *s;
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nkeynes@1150 | 176 | switch( err ) {
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nkeynes@1150 | 177 | case GL_INVALID_ENUM: s = "Invalid enum"; break;
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nkeynes@1150 | 178 | case GL_INVALID_VALUE: s = "Invalid value"; break;
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nkeynes@1150 | 179 | case GL_INVALID_OPERATION: s = "Invalid operation"; break;
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nkeynes@1150 | 180 | case GL_STACK_OVERFLOW: s = "Stack overflow"; break;
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nkeynes@1150 | 181 | case GL_STACK_UNDERFLOW: s = "Stack underflow"; break;
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nkeynes@1150 | 182 | case GL_OUT_OF_MEMORY: s = "Out of memory"; break;
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nkeynes@1150 | 183 | default: s = "Unknown error"; break;
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nkeynes@1150 | 184 | }
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nkeynes@1150 | 185 | if( context ) {
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nkeynes@1150 | 186 | WARN( "%s: GL error: %x (%s)\n", context, err, s );
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nkeynes@1150 | 187 | } else {
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nkeynes@1150 | 188 | WARN( "GL error: %x (%s)\n", err, s );
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nkeynes@1150 | 189 | }
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nkeynes@1150 | 190 | return TRUE;
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nkeynes@1150 | 191 | }
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nkeynes@1150 | 192 | return FALSE;
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nkeynes@1150 | 193 | }
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