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annotate src/video/cybergfx/SDL_cgxgl.c @ 1076:8d3b95ece376

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[PATCH] SDL_GetVideoMode() do not find the best video mode The current GetVideoMode() function stops at the first mode which has any dimensions smaller than the one asked, and gives the previous in the list. If I ask 336x224 with this list: 768x480 768x240 640x400 640x200 384x480 384x240 320x400 320x200 SDL will give me 640x400, because 640x200 as height smaller than what I asked. However the best mode is the smaller which has both dimensions bigger than the one asked (384x240 in my example). This patch fixes this, plus it does not rely on a sorted video mode list.
author Patrice Mandin <patmandin@gmail.com>
date Sun, 12 Jun 2005 16:12:55 +0000
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children c9b51268668f
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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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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 {
255
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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