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annotate src/video/cybergfx/SDL_cgxgl.c @ 946:8520712f8ef0

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author Sam Lantinga <slouken@libsdl.org>
date Sat, 21 Aug 2004 14:54:49 +0000
parents b8d311d90021
children c9b51268668f
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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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 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* StormMesa implementation of SDL OpenGL support */
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29
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30 #include "SDL_error.h"
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31 #include "SDL_cgxgl_c.h"
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32 #include "SDL_cgxvideo.h"
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33
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34 #ifdef HAVE_OPENGL
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35 AmigaMesaContext glcont=NULL;
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36 #endif
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37
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38 /* Init OpenGL */
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39 int CGX_GL_Init(_THIS)
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40 {
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41 #ifdef HAVE_OPENGL
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42 int i = 0;
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43 struct TagItem attributes [ 14 ]; /* 14 should be more than enough :) */
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44 struct Window *win = (struct Window *)SDL_Window;
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45
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46 // default config. Always used...
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47 attributes[i].ti_Tag = AMA_Window; attributes[i++].ti_Data = (unsigned long)win;
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48 attributes[i].ti_Tag = AMA_Left; attributes[i++].ti_Data = 0;
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49 attributes[i].ti_Tag = AMA_Bottom; attributes[i++].ti_Data = 0;
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50 attributes[i].ti_Tag = AMA_Width; attributes[i++].ti_Data = win->Width-win->BorderLeft-win->BorderRight;
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51 attributes[i].ti_Tag = AMA_Height; attributes[i++].ti_Data = win->Height-win->BorderBottom-win->BorderTop;
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52 attributes[i].ti_Tag = AMA_DirectRender; attributes[i++].ti_Data = GL_TRUE;
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53
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54 // double buffer ?
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55 attributes[i].ti_Tag = AMA_DoubleBuf;
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56 if ( this->gl_config.double_buffer ) {
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57 attributes[i++].ti_Data = GL_TRUE;
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58 }
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59 else {
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60 attributes[i++].ti_Data = GL_FALSE;
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61 }
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62 // RGB(A) Mode ?
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63 attributes[i].ti_Tag = AMA_RGBMode;
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64 if ( this->gl_config.red_size != 0 &&
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65 this->gl_config.blue_size != 0 &&
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66 this->gl_config.green_size != 0 ) {
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67 attributes[i++].ti_Data = GL_TRUE;
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68 }
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69 else {
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70 attributes[i++].ti_Data = GL_FALSE;
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71 }
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72 // no depth buffer ?
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73 if ( this->gl_config.depth_size == 0 ) {
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74 attributes[i].ti_Tag = AMA_NoDepth;
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75 attributes[i++].ti_Data = GL_TRUE;
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76 }
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77 // no stencil buffer ?
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78 if ( this->gl_config.stencil_size == 0 ) {
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79 attributes[i].ti_Tag = AMA_NoStencil;
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80 attributes[i++].ti_Data = GL_TRUE;
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81 }
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82 // no accum buffer ?
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83 if ( this->gl_config.accum_red_size != 0 &&
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84 this->gl_config.accum_blue_size != 0 &&
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85 this->gl_config.accum_green_size != 0 ) {
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86 attributes[i].ti_Tag = AMA_NoAccum;
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87 attributes[i++].ti_Data = GL_TRUE;
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88 }
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89 // done...
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90 attributes[i].ti_Tag = TAG_DONE;
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91
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92 glcont = AmigaMesaCreateContext(attributes);
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93 if ( glcont == NULL ) {
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94 SDL_SetError("Couldn't create OpenGL context");
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95 return(-1);
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96 }
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97 this->gl_data->gl_active = 1;
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98 this->gl_config.driver_loaded = 1;
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99
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100 return(0);
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101 #else
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102 SDL_SetError("OpenGL support not configured");
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103 return(-1);
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104 #endif
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105 }
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106
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107 /* Quit OpenGL */
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108 void CGX_GL_Quit(_THIS)
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109 {
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110 #ifdef HAVE_OPENGL
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111 if ( glcont != NULL ) {
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112 AmigaMesaDestroyContext(glcont);
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113 glcont = NULL;
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114 this->gl_data->gl_active = 0;
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115 this->gl_config.driver_loaded = 0;
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116 }
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117 #endif
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118 }
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119
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120 /* Attach context to another window */
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121 int CGX_GL_Update(_THIS)
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122 {
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123 #ifdef HAVE_OPENGL
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124 struct TagItem tags[2];
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125 struct Window *win = (struct Window*)SDL_Window;
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126 if(glcont == NULL) {
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127 return -1; //should never happen
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128 }
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129 tags[0].ti_Tag = AMA_Window;
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130 tags[0].ti_Data = (unsigned long)win;
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131 tags[1].ti_Tag = TAG_DONE;
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132 AmigaMesaSetRast(glcont, tags);
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133
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134 return 0;
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135 #else
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136 SDL_SetError("OpenGL support not configured");
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137 return -1;
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138 #endif
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139 }
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140
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141 #ifdef HAVE_OPENGL
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142
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143 /* Make the current context active */
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144 int CGX_GL_MakeCurrent(_THIS)
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145 {
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146 if(glcont == NULL)
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147 return -1;
0
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148
255
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149 AmigaMesaMakeCurrent(glcont, glcont->buffer);
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150 return 0;
0
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151 }
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152
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153 void CGX_GL_SwapBuffers(_THIS)
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154 {
255
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155 AmigaMesaSwapBuffers(glcont);
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156 }
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157
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158 int CGX_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) {
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159 GLenum mesa_attrib;
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160
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161 switch(attrib) {
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162 case SDL_GL_RED_SIZE:
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163 mesa_attrib = GL_RED_BITS;
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164 break;
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165 case SDL_GL_GREEN_SIZE:
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166 mesa_attrib = GL_GREEN_BITS;
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167 break;
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168 case SDL_GL_BLUE_SIZE:
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169 mesa_attrib = GL_BLUE_BITS;
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170 break;
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171 case SDL_GL_ALPHA_SIZE:
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172 mesa_attrib = GL_ALPHA_BITS;
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173 break;
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174 case SDL_GL_DOUBLEBUFFER:
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175 mesa_attrib = GL_DOUBLEBUFFER;
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176 break;
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177 case SDL_GL_DEPTH_SIZE:
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178 mesa_attrib = GL_DEPTH_BITS;
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179 break;
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180 case SDL_GL_STENCIL_SIZE:
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181 mesa_attrib = GL_STENCIL_BITS;
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182 break;
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183 case SDL_GL_ACCUM_RED_SIZE:
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184 mesa_attrib = GL_ACCUM_RED_BITS;
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185 break;
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186 case SDL_GL_ACCUM_GREEN_SIZE:
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187 mesa_attrib = GL_ACCUM_GREEN_BITS;
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188 break;
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189 case SDL_GL_ACCUM_BLUE_SIZE:
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190 mesa_attrib = GL_ACCUM_BLUE_BITS;
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191 break;
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192 case SDL_GL_ACCUM_ALPHA_SIZE:
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193 mesa_attrib = GL_ACCUM_ALPHA_BITS;
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194 break;
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195 default :
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196 return -1;
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197 }
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198
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199 AmigaMesaGetConfig(glcont->visual, mesa_attrib, value);
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200 return 0;
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201 }
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202
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203 void *CGX_GL_GetProcAddress(_THIS, const char *proc) {
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204 void *func = NULL;
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205 func = AmiGetGLProc(proc);
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206 return func;
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207 }
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208
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209 int CGX_GL_LoadLibrary(_THIS, const char *path) {
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210 /* Library is always open */
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211 this->gl_config.driver_loaded = 1;
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212
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213 return 0;
0
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214 }
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215
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216 #endif /* HAVE_OPENGL */
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217