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annotate src/video/cybergfx/SDL_cgxgl.c @ 1358:c71e05b4dc2e

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More header massaging... works great on Windows. ;-)
author Sam Lantinga <slouken@libsdl.org>
date Fri, 10 Feb 2006 06:48:43 +0000
parents c9b51268668f
children 19418e4422cb
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /* StormMesa implementation of SDL OpenGL support */
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24
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25 #include "SDL_cgxgl_c.h"
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26 #include "SDL_cgxvideo.h"
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27
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28 #ifdef HAVE_OPENGL
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29 AmigaMesaContext glcont=NULL;
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30 #endif
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31
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32 /* Init OpenGL */
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33 int CGX_GL_Init(_THIS)
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34 {
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35 #ifdef HAVE_OPENGL
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36 int i = 0;
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37 struct TagItem attributes [ 14 ]; /* 14 should be more than enough :) */
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38 struct Window *win = (struct Window *)SDL_Window;
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39
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40 // default config. Always used...
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41 attributes[i].ti_Tag = AMA_Window; attributes[i++].ti_Data = (unsigned long)win;
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42 attributes[i].ti_Tag = AMA_Left; attributes[i++].ti_Data = 0;
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43 attributes[i].ti_Tag = AMA_Bottom; attributes[i++].ti_Data = 0;
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44 attributes[i].ti_Tag = AMA_Width; attributes[i++].ti_Data = win->Width-win->BorderLeft-win->BorderRight;
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45 attributes[i].ti_Tag = AMA_Height; attributes[i++].ti_Data = win->Height-win->BorderBottom-win->BorderTop;
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46 attributes[i].ti_Tag = AMA_DirectRender; attributes[i++].ti_Data = GL_TRUE;
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47
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48 // double buffer ?
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49 attributes[i].ti_Tag = AMA_DoubleBuf;
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50 if ( this->gl_config.double_buffer ) {
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51 attributes[i++].ti_Data = GL_TRUE;
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52 }
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53 else {
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54 attributes[i++].ti_Data = GL_FALSE;
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55 }
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56 // RGB(A) Mode ?
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57 attributes[i].ti_Tag = AMA_RGBMode;
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58 if ( this->gl_config.red_size != 0 &&
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59 this->gl_config.blue_size != 0 &&
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60 this->gl_config.green_size != 0 ) {
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61 attributes[i++].ti_Data = GL_TRUE;
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62 }
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63 else {
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64 attributes[i++].ti_Data = GL_FALSE;
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65 }
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66 // no depth buffer ?
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67 if ( this->gl_config.depth_size == 0 ) {
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68 attributes[i].ti_Tag = AMA_NoDepth;
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69 attributes[i++].ti_Data = GL_TRUE;
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70 }
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71 // no stencil buffer ?
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72 if ( this->gl_config.stencil_size == 0 ) {
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73 attributes[i].ti_Tag = AMA_NoStencil;
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74 attributes[i++].ti_Data = GL_TRUE;
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75 }
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76 // no accum buffer ?
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77 if ( this->gl_config.accum_red_size != 0 &&
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78 this->gl_config.accum_blue_size != 0 &&
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79 this->gl_config.accum_green_size != 0 ) {
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80 attributes[i].ti_Tag = AMA_NoAccum;
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81 attributes[i++].ti_Data = GL_TRUE;
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82 }
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83 // done...
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84 attributes[i].ti_Tag = TAG_DONE;
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85
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86 glcont = AmigaMesaCreateContext(attributes);
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87 if ( glcont == NULL ) {
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88 SDL_SetError("Couldn't create OpenGL context");
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89 return(-1);
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90 }
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91 this->gl_data->gl_active = 1;
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92 this->gl_config.driver_loaded = 1;
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93
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94 return(0);
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95 #else
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96 SDL_SetError("OpenGL support not configured");
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97 return(-1);
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98 #endif
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99 }
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100
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101 /* Quit OpenGL */
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102 void CGX_GL_Quit(_THIS)
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103 {
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104 #ifdef HAVE_OPENGL
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105 if ( glcont != NULL ) {
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106 AmigaMesaDestroyContext(glcont);
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107 glcont = NULL;
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108 this->gl_data->gl_active = 0;
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109 this->gl_config.driver_loaded = 0;
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110 }
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111 #endif
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112 }
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113
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114 /* Attach context to another window */
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115 int CGX_GL_Update(_THIS)
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116 {
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117 #ifdef HAVE_OPENGL
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118 struct TagItem tags[2];
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119 struct Window *win = (struct Window*)SDL_Window;
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120 if(glcont == NULL) {
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121 return -1; //should never happen
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122 }
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123 tags[0].ti_Tag = AMA_Window;
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124 tags[0].ti_Data = (unsigned long)win;
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125 tags[1].ti_Tag = TAG_DONE;
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126 AmigaMesaSetRast(glcont, tags);
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127
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128 return 0;
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129 #else
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130 SDL_SetError("OpenGL support not configured");
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131 return -1;
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132 #endif
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133 }
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134
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135 #ifdef HAVE_OPENGL
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136
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137 /* Make the current context active */
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138 int CGX_GL_MakeCurrent(_THIS)
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139 {
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140 if(glcont == NULL)
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141 return -1;
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142
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143 AmigaMesaMakeCurrent(glcont, glcont->buffer);
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144 return 0;
0
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145 }
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146
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147 void CGX_GL_SwapBuffers(_THIS)
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148 {
255
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149 AmigaMesaSwapBuffers(glcont);
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150 }
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151
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152 int CGX_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) {
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153 GLenum mesa_attrib;
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154
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155 switch(attrib) {
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156 case SDL_GL_RED_SIZE:
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157 mesa_attrib = GL_RED_BITS;
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158 break;
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159 case SDL_GL_GREEN_SIZE:
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160 mesa_attrib = GL_GREEN_BITS;
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161 break;
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162 case SDL_GL_BLUE_SIZE:
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163 mesa_attrib = GL_BLUE_BITS;
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164 break;
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165 case SDL_GL_ALPHA_SIZE:
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166 mesa_attrib = GL_ALPHA_BITS;
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167 break;
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168 case SDL_GL_DOUBLEBUFFER:
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169 mesa_attrib = GL_DOUBLEBUFFER;
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170 break;
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171 case SDL_GL_DEPTH_SIZE:
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172 mesa_attrib = GL_DEPTH_BITS;
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173 break;
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174 case SDL_GL_STENCIL_SIZE:
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175 mesa_attrib = GL_STENCIL_BITS;
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176 break;
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177 case SDL_GL_ACCUM_RED_SIZE:
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178 mesa_attrib = GL_ACCUM_RED_BITS;
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179 break;
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180 case SDL_GL_ACCUM_GREEN_SIZE:
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181 mesa_attrib = GL_ACCUM_GREEN_BITS;
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182 break;
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diff changeset
183 case SDL_GL_ACCUM_BLUE_SIZE:
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184 mesa_attrib = GL_ACCUM_BLUE_BITS;
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185 break;
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diff changeset
186 case SDL_GL_ACCUM_ALPHA_SIZE:
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187 mesa_attrib = GL_ACCUM_ALPHA_BITS;
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188 break;
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189 default :
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190 return -1;
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191 }
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192
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193 AmigaMesaGetConfig(glcont->visual, mesa_attrib, value);
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194 return 0;
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195 }
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196
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197 void *CGX_GL_GetProcAddress(_THIS, const char *proc) {
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198 void *func = NULL;
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199 func = AmiGetGLProc(proc);
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200 return func;
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201 }
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202
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203 int CGX_GL_LoadLibrary(_THIS, const char *path) {
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204 /* Library is always open */
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205 this->gl_config.driver_loaded = 1;
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206
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207 return 0;
0
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208 }
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209
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210 #endif /* HAVE_OPENGL */
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211