nkeynes@635 | 1 | /**
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nkeynes@635 | 2 | * $Id$
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nkeynes@635 | 3 | *
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nkeynes@1130 | 4 | * GLSL wrapper code to hide the differences between the different gl/sl APIs.
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nkeynes@1130 | 5 | *
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nkeynes@1130 | 6 | * Copyright (c) 2007-2010 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@635 | 18 |
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nkeynes@1130 | 19 | #include <assert.h>
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nkeynes@1130 | 20 |
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nkeynes@635 | 21 | #include "lxdream.h"
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nkeynes@635 | 22 | #include "display.h"
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nkeynes@635 | 23 | #include "pvr2/glutil.h"
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nkeynes@1207 | 24 | #include "pvr2/shaders.h"
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nkeynes@635 | 25 |
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nkeynes@635 | 26 | #define MAX_ERROR_BUF 4096
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nkeynes@1130 | 27 | #define INVALID_SHADER 0
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nkeynes@1130 | 28 | #define INVALID_PROGRAM 0
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nkeynes@1130 | 29 |
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nkeynes@1130 | 30 | #ifdef HAVE_OPENGL_SHADER_ARB
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nkeynes@1130 | 31 | typedef GLhandleARB gl_program_t;
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nkeynes@1130 | 32 | typedef GLhandleARB gl_shader_t;
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nkeynes@1130 | 33 | #else
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nkeynes@1130 | 34 | typedef GLuint gl_program_t;
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nkeynes@1130 | 35 | typedef GLuint gl_shader_t;
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nkeynes@1130 | 36 | #endif
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nkeynes@1130 | 37 |
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nkeynes@1130 | 38 | gboolean glsl_is_supported();
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nkeynes@1130 | 39 | gl_shader_t glsl_create_vertex_shader( const char *source );
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nkeynes@1130 | 40 | gl_shader_t glsl_create_fragment_shader( const char *source );
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nkeynes@1130 | 41 | gl_program_t glsl_create_program( gl_shader_t *shaderv );
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nkeynes@1130 | 42 | void glsl_use_program(gl_program_t program);
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nkeynes@1130 | 43 | void glsl_destroy_shader(gl_shader_t shader);
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nkeynes@1130 | 44 | void glsl_destroy_program(gl_program_t program);
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nkeynes@1130 | 45 |
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nkeynes@1208 | 46 | typedef void (*program_cleanup_fn_t)();
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nkeynes@1208 | 47 | static void glsl_set_cleanup_fn( program_cleanup_fn_t );
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nkeynes@1208 | 48 |
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nkeynes@1130 | 49 | #ifdef HAVE_OPENGL_SHADER_ARB
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nkeynes@635 | 50 |
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nkeynes@635 | 51 | gboolean glsl_is_supported()
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nkeynes@635 | 52 | {
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nkeynes@635 | 53 | return isGLExtensionSupported("GL_ARB_fragment_shader") &&
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nkeynes@736 | 54 | isGLExtensionSupported("GL_ARB_vertex_shader") &&
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nkeynes@736 | 55 | isGLExtensionSupported("GL_ARB_shading_language_100");
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nkeynes@635 | 56 | }
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nkeynes@635 | 57 |
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nkeynes@1134 | 58 | const char *glsl_get_version()
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nkeynes@1134 | 59 | {
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nkeynes@1134 | 60 | return glGetString(GL_SHADING_LANGUAGE_VERSION_ARB);
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nkeynes@1134 | 61 | }
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nkeynes@1134 | 62 |
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nkeynes@635 | 63 | void glsl_print_error( char *msg, GLhandleARB obj )
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nkeynes@635 | 64 | {
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nkeynes@635 | 65 | char buf[MAX_ERROR_BUF];
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nkeynes@635 | 66 | GLsizei length;
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nkeynes@635 | 67 | glGetInfoLogARB( obj, sizeof(buf), &length, buf );
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nkeynes@635 | 68 | ERROR( "%s: %s", msg, buf );
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nkeynes@635 | 69 | }
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nkeynes@635 | 70 |
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nkeynes@635 | 71 | gboolean glsl_check_shader_error( char *msg, GLhandleARB obj )
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nkeynes@635 | 72 | {
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nkeynes@635 | 73 | GLint value;
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nkeynes@635 | 74 |
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nkeynes@635 | 75 | glGetObjectParameterivARB(obj, GL_OBJECT_COMPILE_STATUS_ARB, &value);
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nkeynes@635 | 76 | if( value == 0 ) {
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nkeynes@736 | 77 | glsl_print_error(msg, obj);
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nkeynes@736 | 78 | return FALSE;
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nkeynes@635 | 79 | }
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nkeynes@635 | 80 | return TRUE;
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nkeynes@635 | 81 | }
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nkeynes@635 | 82 |
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nkeynes@635 | 83 | gboolean glsl_check_program_error( char *msg, GLhandleARB obj )
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nkeynes@635 | 84 | {
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nkeynes@635 | 85 | if( glGetError() != GL_NO_ERROR ) {
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nkeynes@736 | 86 | glsl_print_error(msg, obj);
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nkeynes@635 | 87 | }
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nkeynes@635 | 88 | return TRUE;
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nkeynes@635 | 89 | }
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nkeynes@635 | 90 |
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nkeynes@1130 | 91 | gl_shader_t glsl_create_vertex_shader( const char *source )
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nkeynes@1130 | 92 | {
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nkeynes@1130 | 93 | gboolean ok;
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nkeynes@1130 | 94 | gl_shader_t shader = glCreateShaderObjectARB(GL_VERTEX_SHADER_ARB);
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nkeynes@635 | 95 |
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nkeynes@1130 | 96 | glShaderSourceARB( shader, 1, &source, NULL );
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nkeynes@1130 | 97 | glCompileShaderARB(shader);
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nkeynes@1130 | 98 | ok = glsl_check_shader_error("Failed to compile vertex shader", shader);
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nkeynes@1130 | 99 | if( !ok ) {
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nkeynes@1130 | 100 | glDeleteObjectARB(shader);
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nkeynes@1130 | 101 | return INVALID_SHADER;
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nkeynes@635 | 102 | } else {
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nkeynes@1130 | 103 | return shader;
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nkeynes@635 | 104 | }
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nkeynes@635 | 105 | }
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nkeynes@635 | 106 |
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nkeynes@1130 | 107 | gl_shader_t glsl_create_fragment_shader( const char *source )
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nkeynes@635 | 108 | {
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nkeynes@1130 | 109 | gboolean ok;
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nkeynes@1130 | 110 | gl_shader_t shader = glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB);
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nkeynes@1130 | 111 |
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nkeynes@1130 | 112 | glShaderSourceARB( shader, 1, &source, NULL );
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nkeynes@1130 | 113 | glCompileShaderARB(shader);
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nkeynes@1130 | 114 | ok = glsl_check_shader_error("Failed to compile fragment shader", shader);
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nkeynes@1130 | 115 | if( !ok ) {
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nkeynes@1130 | 116 | glDeleteObjectARB(shader);
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nkeynes@1130 | 117 | return INVALID_SHADER;
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nkeynes@1130 | 118 | } else {
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nkeynes@1130 | 119 | return shader;
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nkeynes@1130 | 120 | }
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nkeynes@1130 | 121 | }
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nkeynes@1130 | 122 |
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nkeynes@1130 | 123 | gl_program_t glsl_create_program( gl_shader_t *shaderv )
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nkeynes@1130 | 124 | {
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nkeynes@1130 | 125 | gboolean ok;
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nkeynes@1130 | 126 | unsigned i;
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nkeynes@1130 | 127 | gl_program_t program = glCreateProgramObjectARB();
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nkeynes@1130 | 128 |
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nkeynes@1130 | 129 | for( i=0; shaderv[i] != INVALID_SHADER; i++ ) {
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nkeynes@1130 | 130 | glAttachObjectARB(program, shaderv[i]);
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nkeynes@1130 | 131 | }
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nkeynes@1130 | 132 |
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nkeynes@1130 | 133 | glLinkProgramARB(program);
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nkeynes@1130 | 134 | ok = glsl_check_program_error( "Failed to link shader program", program );
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nkeynes@1130 | 135 | if( !ok ) {
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nkeynes@1130 | 136 | glDeleteObjectARB(program);
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nkeynes@1130 | 137 | return INVALID_PROGRAM;
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nkeynes@1130 | 138 | } else {
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nkeynes@1130 | 139 | return program;
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nkeynes@1130 | 140 | }
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nkeynes@1130 | 141 | }
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nkeynes@1130 | 142 |
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nkeynes@1130 | 143 | void glsl_use_program(gl_program_t program)
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nkeynes@1130 | 144 | {
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nkeynes@1130 | 145 | glUseProgramObjectARB(program);
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nkeynes@1130 | 146 | }
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nkeynes@1130 | 147 |
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nkeynes@1130 | 148 | void glsl_destroy_shader(gl_shader_t shader)
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nkeynes@1130 | 149 | {
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nkeynes@1130 | 150 | glDeleteObjectARB(shader);
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nkeynes@1130 | 151 | }
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nkeynes@1130 | 152 |
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nkeynes@1130 | 153 | void glsl_destroy_program(gl_program_t program)
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nkeynes@1130 | 154 | {
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nkeynes@1130 | 155 | glDeleteObjectARB(program);
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nkeynes@635 | 156 | }
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nkeynes@635 | 157 |
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nkeynes@1207 | 158 | static inline GLint glsl_get_uniform_location(gl_program_t program, const char *name)
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nkeynes@1140 | 159 | {
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nkeynes@1140 | 160 | return glGetUniformLocationARB(program, name);
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nkeynes@1140 | 161 | }
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nkeynes@1140 | 162 |
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nkeynes@1207 | 163 | static inline GLint glsl_get_attrib_location(gl_program_t program, const char *name)
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nkeynes@1206 | 164 | {
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nkeynes@1206 | 165 | return glGetAttribLocationARB(program, name);
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nkeynes@1206 | 166 | }
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nkeynes@1206 | 167 |
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nkeynes@1207 | 168 | #define glsl_set_uniform_sampler1D(id,v) glUniform1iARB(id,v)
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nkeynes@1207 | 169 | #define glsl_set_uniform_sampler2D(id,v) glUniform1iARB(id,v)
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nkeynes@1229 | 170 | #define glsl_set_uniform_float(id,v) glUniform1fARB(id,v)
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nkeynes@1209 | 171 | #define glsl_set_uniform_vec3(id,v) glUniform3fvARB(id,1,v)
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nkeynes@1207 | 172 | #define glsl_set_uniform_vec4(id,v) glUniform4fvARB(id,1,v)
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nkeynes@1207 | 173 | #define glsl_set_uniform_mat4(id,v) glUniformMatrix4fvARB(id,1,GL_FALSE,v)
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nkeynes@1207 | 174 | #define glsl_set_attrib_vec3(id,stride,v) glVertexAttribPointerARB(id, 3, GL_FLOAT, GL_FALSE, stride, v)
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nkeynes@1207 | 175 | #define glsl_set_attrib_vec4(id,stride,v) glVertexAttribPointerARB(id, 4, GL_FLOAT, GL_FALSE, stride, v)
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nkeynes@1208 | 176 | #define glsl_enable_attrib(id) glEnableVertexAttribArrayARB(id)
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nkeynes@1208 | 177 | #define glsl_disable_attrib(id) glDisableVertexAttribArrayARB(id)
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nkeynes@1206 | 178 |
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nkeynes@656 | 179 | #elif HAVE_OPENGL_SHADER
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nkeynes@1130 | 180 |
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nkeynes@1130 | 181 | gboolean glsl_is_supported()
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nkeynes@1130 | 182 | {
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nkeynes@1130 | 183 | return isGLExtensionSupported("GL_ARB_fragment_shader") &&
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nkeynes@1130 | 184 | isGLExtensionSupported("GL_ARB_vertex_shader") &&
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nkeynes@1130 | 185 | isGLExtensionSupported("GL_ARB_shading_language_100");
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nkeynes@1130 | 186 | }
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nkeynes@635 | 187 |
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nkeynes@1134 | 188 | const char *glsl_get_version()
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nkeynes@1134 | 189 | {
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nkeynes@1134 | 190 | return glGetString(GL_SHADING_LANGUAGE_VERSION);
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nkeynes@1134 | 191 | }
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nkeynes@1134 | 192 |
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nkeynes@635 | 193 | gboolean glsl_check_shader_error( char *msg, GLuint shader )
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nkeynes@635 | 194 | {
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nkeynes@635 | 195 | GLint value;
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nkeynes@635 | 196 |
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nkeynes@635 | 197 | glGetShaderiv( shader, GL_COMPILE_STATUS, &value );
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nkeynes@635 | 198 | if( value == 0 ) {
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nkeynes@736 | 199 | char buf[MAX_ERROR_BUF];
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nkeynes@736 | 200 | GLsizei length;
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nkeynes@736 | 201 | glGetShaderInfoLog( shader, sizeof(buf), &length, buf );
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nkeynes@736 | 202 | ERROR( "%s: %s", msg, buf );
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nkeynes@736 | 203 | return FALSE;
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nkeynes@635 | 204 | }
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nkeynes@635 | 205 | return TRUE;
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nkeynes@635 | 206 | }
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nkeynes@1130 | 207 |
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nkeynes@635 | 208 | gboolean glsl_check_program_error( char *msg, GLuint program )
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nkeynes@635 | 209 | {
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nkeynes@635 | 210 | if( glGetError() != GL_NO_ERROR ) {
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nkeynes@736 | 211 | char buf[MAX_ERROR_BUF];
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nkeynes@736 | 212 | GLsizei length;
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nkeynes@736 | 213 | glGetProgramInfoLog( program, sizeof(buf), &length, buf );
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nkeynes@736 | 214 | ERROR( "%s: %s", msg, buf );
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nkeynes@736 | 215 | return FALSE;
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nkeynes@635 | 216 | }
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nkeynes@635 | 217 | return TRUE;
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nkeynes@635 | 218 | }
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nkeynes@635 | 219 |
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nkeynes@1130 | 220 | gl_shader_t glsl_create_vertex_shader( const char *source )
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nkeynes@635 | 221 | {
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nkeynes@1130 | 222 | gboolean ok;
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nkeynes@1130 | 223 | gl_shader_t shader = glCreateShader(GL_VERTEX_SHADER);
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nkeynes@635 | 224 |
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nkeynes@1130 | 225 | glShaderSource( shader, 1, &source, NULL );
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nkeynes@1130 | 226 | glCompileShader(shader);
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nkeynes@1203 | 227 | ok = glsl_check_shader_error( "Failed to compile vertex shader", shader );
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nkeynes@1130 | 228 | if( !ok ) {
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nkeynes@1130 | 229 | glDeleteShader(shader);
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nkeynes@1130 | 230 | return INVALID_SHADER;
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nkeynes@1130 | 231 | } else {
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nkeynes@1130 | 232 | return shader;
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nkeynes@635 | 233 | }
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nkeynes@635 | 234 |
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nkeynes@1130 | 235 | }
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nkeynes@635 | 236 |
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nkeynes@1130 | 237 | gl_shader_t glsl_create_fragment_shader( const char *source )
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nkeynes@1130 | 238 | {
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nkeynes@1130 | 239 | gboolean ok;
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nkeynes@1130 | 240 | gl_shader_t shader = glCreateShader(GL_FRAGMENT_SHADER);
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nkeynes@1130 | 241 |
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nkeynes@1130 | 242 | glShaderSource( shader, 1, &source, NULL );
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nkeynes@1130 | 243 | glCompileShader(shader);
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nkeynes@1203 | 244 | ok = glsl_check_shader_error( "Failed to compile fragment shader", shader );
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nkeynes@1130 | 245 | if( !ok ) {
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nkeynes@1130 | 246 | glDeleteShader(shader);
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nkeynes@1130 | 247 | return INVALID_SHADER;
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nkeynes@1130 | 248 | } else {
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nkeynes@1130 | 249 | return shader;
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nkeynes@635 | 250 | }
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nkeynes@1130 | 251 | }
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nkeynes@1130 | 252 |
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nkeynes@1130 | 253 | gl_program_t glsl_create_program( gl_shader_t *shaderv )
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nkeynes@1130 | 254 | {
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nkeynes@1130 | 255 | gboolean ok;
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nkeynes@1130 | 256 | unsigned i;
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nkeynes@1130 | 257 | gl_program_t program = glCreateProgram();
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nkeynes@1130 | 258 |
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nkeynes@1130 | 259 | for( i=0; shaderv[i] != INVALID_SHADER; i++ ) {
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nkeynes@1130 | 260 | glAttachShader(program, shaderv[i]);
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nkeynes@1130 | 261 | }
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nkeynes@1130 | 262 | glLinkProgram(program);
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nkeynes@1130 | 263 | ok = glsl_check_program_error( "Failed to link shader program", program );
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nkeynes@1130 | 264 | if( !ok ) {
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nkeynes@1130 | 265 | glDeleteProgram(program);
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nkeynes@1130 | 266 | return INVALID_PROGRAM;
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nkeynes@1130 | 267 | } else {
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nkeynes@1130 | 268 | return program;
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nkeynes@1130 | 269 | }
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nkeynes@1130 | 270 | }
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nkeynes@1130 | 271 |
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nkeynes@1130 | 272 | void glsl_use_program(gl_program_t program)
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nkeynes@1130 | 273 | {
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nkeynes@1130 | 274 | glUseProgram(program);
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nkeynes@1130 | 275 | }
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nkeynes@1130 | 276 |
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nkeynes@1130 | 277 | void glsl_destroy_shader(gl_shader_t shader)
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nkeynes@1130 | 278 | {
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nkeynes@1130 | 279 | glDeleteShader(shader);
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nkeynes@1130 | 280 | }
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nkeynes@1130 | 281 |
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nkeynes@1130 | 282 | void glsl_destroy_program(gl_program_t program)
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nkeynes@1130 | 283 | {
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nkeynes@1130 | 284 | glDeleteProgram(program);
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nkeynes@1130 | 285 | }
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nkeynes@1130 | 286 |
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nkeynes@1207 | 287 | static inline GLint glsl_get_uniform_location(gl_program_t program, const char *name)
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nkeynes@1140 | 288 | {
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nkeynes@1140 | 289 | return glGetUniformLocation(program, name);
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nkeynes@1140 | 290 | }
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nkeynes@1207 | 291 | static inline GLint glsl_get_attrib_location(gl_program_t program, const char *name)
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nkeynes@1206 | 292 | {
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nkeynes@1206 | 293 | return glGetAttribLocation(program, name);
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nkeynes@1206 | 294 | }
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nkeynes@1207 | 295 |
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nkeynes@1207 | 296 | #define glsl_set_uniform_sampler1D(id,v) glUniform1i(id,v)
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nkeynes@1207 | 297 | #define glsl_set_uniform_sampler2D(id,v) glUniform1i(id,v)
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nkeynes@1229 | 298 | #define glsl_set_uniform_float(id,v) glUniform1f(id,v)
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nkeynes@1209 | 299 | #define glsl_set_uniform_vec3(id,v) glUniform3fv(id,1,v)
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nkeynes@1207 | 300 | #define glsl_set_uniform_vec4(id,v) glUniform4fv(id,1,v)
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nkeynes@1207 | 301 | #define glsl_set_uniform_mat4(id,v) glUniformMatrix4fv(id,1,GL_FALSE,v)
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nkeynes@1207 | 302 | #define glsl_set_attrib_vec3(id,stride,v) glVertexAttribPointer(id, 3, GL_FLOAT, GL_FALSE, stride, v)
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nkeynes@1207 | 303 | #define glsl_set_attrib_vec4(id,stride,v) glVertexAttribPointer(id, 4, GL_FLOAT, GL_FALSE, stride, v)
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nkeynes@1208 | 304 | #define glsl_enable_attrib(id) glEnableVertexAttribArray(id)
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nkeynes@1208 | 305 | #define glsl_disable_attrib(id) glDisableVertexAttribArray(id)
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nkeynes@1207 | 306 |
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nkeynes@1207 | 307 |
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nkeynes@1130 | 308 | #else
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nkeynes@1130 | 309 | gboolean glsl_is_supported()
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nkeynes@1130 | 310 | {
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nkeynes@1130 | 311 | return FALSE;
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nkeynes@1130 | 312 | }
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nkeynes@1130 | 313 |
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nkeynes@1203 | 314 | const char *glsl_get_version()
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nkeynes@1134 | 315 | {
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nkeynes@1134 | 316 | return 0;
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nkeynes@1134 | 317 | }
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nkeynes@1134 | 318 |
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nkeynes@1130 | 319 | gl_shader_t glsl_create_vertex_shader( const char *source )
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nkeynes@1130 | 320 | {
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nkeynes@1130 | 321 | return 0;
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nkeynes@1130 | 322 | }
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nkeynes@1130 | 323 |
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nkeynes@1130 | 324 | gl_shader_t glsl_create_fragment_shader( const char *source )
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nkeynes@1130 | 325 | {
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nkeynes@1130 | 326 | return 0;
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nkeynes@1130 | 327 | }
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nkeynes@1130 | 328 |
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nkeynes@1203 | 329 | gl_program_t glsl_create_program( gl_shader_t *shaderv )
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nkeynes@1130 | 330 | {
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nkeynes@1130 | 331 | return 0;
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nkeynes@1130 | 332 | }
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nkeynes@1130 | 333 |
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nkeynes@1130 | 334 | void glsl_use_program(gl_program_t program)
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nkeynes@1130 | 335 | {
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nkeynes@1130 | 336 | }
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nkeynes@1130 | 337 |
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nkeynes@1130 | 338 | void glsl_destroy_shader(gl_shader_t shader)
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nkeynes@1130 | 339 | {
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nkeynes@1130 | 340 | }
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nkeynes@1130 | 341 |
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nkeynes@1130 | 342 | void glsl_destroy_program(gl_program_t program)
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nkeynes@1130 | 343 | {
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nkeynes@1130 | 344 | }
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nkeynes@1140 | 345 |
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nkeynes@1207 | 346 | static inline GLint glsl_get_uniform_location(gl_program_t program, const char *name)
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nkeynes@1140 | 347 | {
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nkeynes@1140 | 348 | return 0;
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nkeynes@1140 | 349 | }
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nkeynes@1140 | 350 |
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nkeynes@1207 | 351 | static inline GLint glsl_get_attrib_location(gl_program_t program, const char *name)
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nkeynes@1206 | 352 | {
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nkeynes@1206 | 353 | return 0;
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nkeynes@1206 | 354 | }
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nkeynes@1207 | 355 |
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nkeynes@1229 | 356 | #define glsl_set_uniform_sampler1D(id,v)
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nkeynes@1207 | 357 | #define glsl_set_uniform_sampler2D(id,v)
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nkeynes@1229 | 358 | #define glsl_set_uniform_float(id,v)
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nkeynes@1209 | 359 | #define glsl_set_uniform_vec3(id,v)
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nkeynes@1207 | 360 | #define glsl_set_uniform_vec4(id,v)
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nkeynes@1207 | 361 | #define glsl_set_uniform_mat4(id,v)
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nkeynes@1207 | 362 | #define glsl_set_attrib_vec3(id,stride,v)
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nkeynes@1207 | 363 | #define glsl_set_attrib_vec4(id,stride,v)
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nkeynes@1208 | 364 | #define glsl_enable_attrib(id)
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nkeynes@1208 | 365 | #define glsl_disable_attrib(id)
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nkeynes@1207 | 366 |
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nkeynes@1207 | 367 |
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nkeynes@1130 | 368 | #endif
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nkeynes@1130 | 369 |
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nkeynes@1130 | 370 | /****************************************************************************/
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nkeynes@1130 | 371 |
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nkeynes@1208 | 372 | program_cleanup_fn_t current_cleanup_fn = NULL;
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nkeynes@1208 | 373 |
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nkeynes@1130 | 374 | /* Pull in the auto-generated shader definitions */
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nkeynes@1130 | 375 |
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nkeynes@1130 | 376 | #include "pvr2/shaders.def"
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nkeynes@1130 | 377 |
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nkeynes@1130 | 378 | static gl_program_t program_array[GLSL_NUM_PROGRAMS];
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nkeynes@1130 | 379 |
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nkeynes@1208 | 380 |
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nkeynes@1130 | 381 | gboolean glsl_load_shaders()
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nkeynes@1130 | 382 | {
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nkeynes@1130 | 383 | gl_shader_t shader_array[GLSL_NUM_SHADERS];
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nkeynes@1130 | 384 | gboolean ok = TRUE;
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nkeynes@1130 | 385 | unsigned i, j;
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nkeynes@1130 | 386 | for( i=0; i<GLSL_NUM_SHADERS; i++ )
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nkeynes@1130 | 387 | shader_array[i] = INVALID_SHADER;
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nkeynes@1130 | 388 | for( i=0; i<GLSL_NUM_PROGRAMS; i++ )
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nkeynes@1130 | 389 | program_array[i] = INVALID_PROGRAM;
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nkeynes@1130 | 390 |
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nkeynes@1130 | 391 | /* Compile the shader fragments */
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nkeynes@1130 | 392 | for( i=0; shader_source[i].type != GLSL_NO_SHADER; i++ ) {
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nkeynes@1130 | 393 | gl_shader_t shader = INVALID_SHADER;
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nkeynes@1130 | 394 | switch(shader_source[i].type) {
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nkeynes@1130 | 395 | case GLSL_VERTEX_SHADER:
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nkeynes@1130 | 396 | shader = glsl_create_vertex_shader(shader_source[i].source);
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nkeynes@1130 | 397 | break;
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nkeynes@1130 | 398 | case GLSL_FRAGMENT_SHADER:
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nkeynes@1130 | 399 | shader = glsl_create_fragment_shader(shader_source[i].source);
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nkeynes@1130 | 400 | break;
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nkeynes@1130 | 401 | }
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nkeynes@1130 | 402 | if( shader == INVALID_SHADER ) {
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nkeynes@1130 | 403 | ok = FALSE;
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nkeynes@1130 | 404 | break;
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nkeynes@1130 | 405 | } else {
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nkeynes@1130 | 406 | shader_array[i] = shader;
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nkeynes@1130 | 407 | }
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nkeynes@635 | 408 | }
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nkeynes@635 | 409 |
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nkeynes@1130 | 410 | /* Link the programs */
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nkeynes@1130 | 411 | if(ok) for( i=0; program_list[i][0] != GLSL_NO_SHADER; i++ ) {
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nkeynes@1130 | 412 | gl_shader_t shaderv[GLSL_NUM_SHADERS+1];
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nkeynes@1130 | 413 | for( j=0; program_list[i][j] != GLSL_NO_SHADER; j++ ) {
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nkeynes@1130 | 414 | shaderv[j] = shader_array[program_list[i][j]];
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nkeynes@736 | 415 | }
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nkeynes@1130 | 416 | shaderv[j] = INVALID_SHADER;
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nkeynes@1130 | 417 | gl_program_t program = glsl_create_program(shaderv);
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nkeynes@1130 | 418 | if( program == INVALID_PROGRAM ) {
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nkeynes@1130 | 419 | ok = FALSE;
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nkeynes@1130 | 420 | break;
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nkeynes@1130 | 421 | } else {
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nkeynes@1166 | 422 | /* Check that we can actually use the program (can this really fail?) */
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nkeynes@1166 | 423 | glsl_use_program(program);
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nkeynes@1166 | 424 | if( !glsl_check_program_error( "Failed to activate shader program", program ) ) {
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nkeynes@1166 | 425 | ok = FALSE;
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nkeynes@1166 | 426 | }
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nkeynes@1130 | 427 | program_array[i] = program;
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nkeynes@736 | 428 | }
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nkeynes@635 | 429 | }
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nkeynes@635 | 430 |
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nkeynes@1130 | 431 | /**
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nkeynes@1130 | 432 | * Destroy the compiled fragments (the linked programs don't need them
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nkeynes@1130 | 433 | * anymore)
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nkeynes@1130 | 434 | */
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nkeynes@1130 | 435 | for( i=0; i<GLSL_NUM_SHADERS; i++ ) {
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nkeynes@1130 | 436 | if( shader_array[i] != INVALID_SHADER )
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nkeynes@1130 | 437 | glsl_destroy_shader(shader_array[i]);
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nkeynes@1130 | 438 | }
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nkeynes@1130 | 439 |
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nkeynes@1130 | 440 | /**
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nkeynes@1130 | 441 | * If we errored, delete the programs. It's all or nothing.
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nkeynes@1130 | 442 | */
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nkeynes@1130 | 443 | if( !ok ) {
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nkeynes@736 | 444 | glsl_unload_shaders();
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nkeynes@1130 | 445 | return FALSE;
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nkeynes@635 | 446 | }
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nkeynes@1166 | 447 |
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nkeynes@1207 | 448 | glsl_init_programs(program_array);
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nkeynes@1166 | 449 | glsl_use_program(0);
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nkeynes@1130 | 450 | return TRUE;
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nkeynes@635 | 451 | }
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nkeynes@635 | 452 |
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nkeynes@1208 | 453 | static void glsl_set_cleanup_fn( program_cleanup_fn_t fn )
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nkeynes@1208 | 454 | {
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nkeynes@1208 | 455 | if( fn != current_cleanup_fn ) {
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nkeynes@1208 | 456 | if( current_cleanup_fn != NULL ) {
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nkeynes@1208 | 457 | current_cleanup_fn();
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nkeynes@1208 | 458 | }
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nkeynes@1208 | 459 | current_cleanup_fn = fn;
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nkeynes@1208 | 460 | }
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nkeynes@1208 | 461 | }
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nkeynes@1208 | 462 |
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nkeynes@1208 | 463 | static void glsl_run_cleanup_fn()
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nkeynes@1208 | 464 | {
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nkeynes@1208 | 465 | if( current_cleanup_fn ) {
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nkeynes@1208 | 466 | current_cleanup_fn();
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nkeynes@1208 | 467 | }
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nkeynes@1208 | 468 | current_cleanup_fn = NULL;
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nkeynes@1208 | 469 | }
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nkeynes@1208 | 470 |
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nkeynes@1130 | 471 | void glsl_unload_shaders()
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nkeynes@635 | 472 | {
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nkeynes@1130 | 473 | unsigned i;
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nkeynes@1208 | 474 | glsl_run_cleanup_fn();
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nkeynes@1130 | 475 | for( i=0; i<GLSL_NUM_PROGRAMS; i++ ) {
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nkeynes@1130 | 476 | if( program_array[i] != INVALID_PROGRAM ) {
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nkeynes@1130 | 477 | glsl_destroy_program(program_array[i]);
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nkeynes@1130 | 478 | program_array[i] = INVALID_PROGRAM;
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nkeynes@736 | 479 | }
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nkeynes@635 | 480 | }
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nkeynes@635 | 481 | }
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nkeynes@635 | 482 |
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nkeynes@1130 | 483 | void glsl_clear_shader()
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nkeynes@656 | 484 | {
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nkeynes@1208 | 485 | glsl_run_cleanup_fn();
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nkeynes@1130 | 486 | glsl_use_program(0);
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nkeynes@656 | 487 | }
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nkeynes@1208 | 488 |
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