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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 #include "SDL_config.h" |
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23 |
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24 /* Atari OSMesa.ldg implementation of SDL OpenGL support */ |
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25 |
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26 /*--- Includes ---*/ |
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27 |
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28 #if SDL_VIDEO_OPENGL |
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29 #include <GL/osmesa.h> |
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30 #endif |
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31 |
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32 #include <mint/osbind.h> |
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33 |
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34 #include "SDL_endian.h" |
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35 #include "SDL_video.h" |
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36 #include "SDL_atarigl_c.h" |
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37 #if SDL_VIDEO_OPENGL_OSMESA_DYNAMIC |
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38 #include "SDL_loadso.h" |
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39 #endif |
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40 |
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41 /*--- Defines ---*/ |
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42 |
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43 #define PATH_OSMESA_LDG "osmesa.ldg" |
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44 #define PATH_MESAGL_LDG "mesa_gl.ldg" |
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45 #define PATH_TINYGL_LDG "tiny_gl.ldg" |
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46 |
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47 #define VDI_RGB 0xf |
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48 |
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49 /*--- Functions prototypes ---*/ |
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50 |
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51 static void SDL_AtariGL_UnloadLibrary(_THIS); |
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52 |
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53 #if SDL_VIDEO_OPENGL |
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54 static void CopyShadowNull(_THIS, SDL_Surface *surface); |
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55 static void CopyShadowDirect(_THIS, SDL_Surface *surface); |
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56 static void CopyShadowRGBTo555(_THIS, SDL_Surface *surface); |
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57 static void CopyShadowRGBTo565(_THIS, SDL_Surface *surface); |
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58 static void CopyShadowRGBSwap(_THIS, SDL_Surface *surface); |
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59 static void CopyShadowRGBToARGB(_THIS, SDL_Surface *surface); |
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60 static void CopyShadowRGBToABGR(_THIS, SDL_Surface *surface); |
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61 static void CopyShadowRGBToBGRA(_THIS, SDL_Surface *surface); |
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62 static void CopyShadowRGBToRGBA(_THIS, SDL_Surface *surface); |
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63 static void CopyShadow8888To555(_THIS, SDL_Surface *surface); |
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64 static void CopyShadow8888To565(_THIS, SDL_Surface *surface); |
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65 |
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66 static void ConvertNull(_THIS, SDL_Surface *surface); |
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67 static void Convert565To555be(_THIS, SDL_Surface *surface); |
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68 static void Convert565To555le(_THIS, SDL_Surface *surface); |
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69 static void Convert565le(_THIS, SDL_Surface *surface); |
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70 static void ConvertBGRAToABGR(_THIS, SDL_Surface *surface); |
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71 |
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72 static int InitNew(_THIS, SDL_Surface *current); |
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73 static int InitOld(_THIS, SDL_Surface *current); |
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74 #endif |
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75 |
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76 /*--- Public functions ---*/ |
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77 |
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78 int SDL_AtariGL_Init(_THIS, SDL_Surface *current) |
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79 { |
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80 #if SDL_VIDEO_OPENGL |
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81 if (gl_oldmesa) { |
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82 gl_active = InitOld(this, current); |
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83 } else { |
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84 gl_active = InitNew(this, current); |
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85 } |
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86 #endif |
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87 |
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88 return (gl_active); |
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89 } |
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90 |
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91 void SDL_AtariGL_Quit(_THIS, SDL_bool unload) |
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92 { |
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93 #if SDL_VIDEO_OPENGL |
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94 if (gl_oldmesa) { |
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95 /* Old mesa implementations */ |
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96 if (this->gl_data->OSMesaDestroyLDG) { |
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97 this->gl_data->OSMesaDestroyLDG(); |
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98 } |
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99 if (gl_shadow) { |
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100 Mfree(gl_shadow); |
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101 gl_shadow = NULL; |
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102 } |
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103 } else { |
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104 /* New mesa implementation */ |
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105 if (gl_ctx) { |
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106 if (this->gl_data->OSMesaDestroyContext) { |
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107 this->gl_data->OSMesaDestroyContext(gl_ctx); |
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108 } |
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109 gl_ctx = NULL; |
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110 } |
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111 } |
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112 |
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113 if (unload) { |
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114 SDL_AtariGL_UnloadLibrary(this); |
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115 } |
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116 |
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117 #endif /* SDL_VIDEO_OPENGL */ |
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118 gl_active = 0; |
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119 } |
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120 |
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121 int SDL_AtariGL_LoadLibrary(_THIS, const char *path) |
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122 { |
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123 #if SDL_VIDEO_OPENGL |
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124 |
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125 #if SDL_VIDEO_OPENGL_OSMESA_DYNAMIC |
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126 void *handle; |
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127 SDL_bool cancel_load; |
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128 |
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129 if (gl_active) { |
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130 SDL_SetError("OpenGL context already created"); |
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131 return -1; |
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132 } |
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133 |
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134 /* Unload previous driver */ |
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135 SDL_AtariGL_UnloadLibrary(this); |
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136 |
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137 /* Load library given by path */ |
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138 handle = SDL_LoadObject(path); |
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139 if (handle == NULL) { |
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140 /* Try to load another one */ |
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141 path = SDL_getenv("SDL_VIDEO_GL_DRIVER"); |
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142 if ( path != NULL ) { |
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143 handle = SDL_LoadObject(path); |
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144 } |
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145 |
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146 /* If it does not work, try some other */ |
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147 if (handle == NULL) { |
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148 path = PATH_OSMESA_LDG; |
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149 handle = SDL_LoadObject(path); |
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150 } |
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151 |
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152 if (handle == NULL) { |
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153 path = PATH_MESAGL_LDG; |
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154 handle = SDL_LoadObject(path); |
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155 } |
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156 |
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157 if (handle == NULL) { |
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158 path = PATH_TINYGL_LDG; |
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159 handle = SDL_LoadObject(path); |
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160 } |
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161 } |
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162 |
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163 if (handle == NULL) { |
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164 SDL_SetError("Could not load OpenGL library"); |
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165 return -1; |
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166 } |
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167 |
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168 this->gl_data->glGetIntegerv = SDL_LoadFunction(handle, "glGetIntegerv"); |
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169 this->gl_data->glFinish = SDL_LoadFunction(handle, "glFinish"); |
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170 this->gl_data->glFlush = SDL_LoadFunction(handle, "glFlush"); |
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171 |
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172 cancel_load = SDL_FALSE; |
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173 if (this->gl_data->glGetIntegerv == NULL) { |
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174 cancel_load = SDL_TRUE; |
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175 } else { |
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176 /* We need either glFinish (OSMesa) or glFlush (TinyGL) */ |
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177 if ((this->gl_data->glFinish == NULL) && |
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178 (this->gl_data->glFlush == NULL)) { |
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179 cancel_load = SDL_TRUE; |
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180 } |
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181 } |
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182 if (cancel_load) { |
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183 SDL_SetError("Could not retrieve OpenGL functions"); |
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184 SDL_UnloadObject(handle); |
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185 /* Restore pointers to static library */ |
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186 SDL_AtariGL_InitPointers(this); |
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187 return -1; |
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188 } |
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189 |
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190 /* Load functions pointers (osmesa.ldg) */ |
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191 this->gl_data->OSMesaCreateContextExt = SDL_LoadFunction(handle, "OSMesaCreateContextExt"); |
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192 this->gl_data->OSMesaDestroyContext = SDL_LoadFunction(handle, "OSMesaDestroyContext"); |
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193 this->gl_data->OSMesaMakeCurrent = SDL_LoadFunction(handle, "OSMesaMakeCurrent"); |
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194 this->gl_data->OSMesaPixelStore = SDL_LoadFunction(handle, "OSMesaPixelStore"); |
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195 this->gl_data->OSMesaGetProcAddress = SDL_LoadFunction(handle, "OSMesaGetProcAddress"); |
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196 |
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197 /* Load old functions pointers (mesa_gl.ldg, tiny_gl.ldg) */ |
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198 this->gl_data->OSMesaCreateLDG = SDL_LoadFunction(handle, "OSMesaCreateLDG"); |
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199 this->gl_data->OSMesaDestroyLDG = SDL_LoadFunction(handle, "OSMesaDestroyLDG"); |
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200 |
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201 gl_oldmesa = 0; |
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202 |
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203 if ( (this->gl_data->OSMesaCreateContextExt == NULL) || |
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204 (this->gl_data->OSMesaDestroyContext == NULL) || |
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205 (this->gl_data->OSMesaMakeCurrent == NULL) || |
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206 (this->gl_data->OSMesaPixelStore == NULL) || |
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207 (this->gl_data->OSMesaGetProcAddress == NULL)) { |
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208 /* Hum, maybe old library ? */ |
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209 if ( (this->gl_data->OSMesaCreateLDG == NULL) || |
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210 (this->gl_data->OSMesaDestroyLDG == NULL)) { |
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211 SDL_SetError("Could not retrieve OSMesa functions"); |
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212 SDL_UnloadObject(handle); |
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213 /* Restore pointers to static library */ |
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214 SDL_AtariGL_InitPointers(this); |
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215 return -1; |
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216 } else { |
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217 gl_oldmesa = 1; |
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218 } |
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219 } |
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220 |
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221 this->gl_config.dll_handle = handle; |
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222 if ( path ) { |
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223 SDL_strlcpy(this->gl_config.driver_path, path, |
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224 SDL_arraysize(this->gl_config.driver_path)); |
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225 } else { |
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226 *this->gl_config.driver_path = '\0'; |
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227 } |
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228 |
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229 #endif |
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230 this->gl_config.driver_loaded = 1; |
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231 |
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232 return 0; |
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233 #else |
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234 return -1; |
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235 #endif |
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236 } |
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237 |
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238 void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc) |
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239 { |
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240 void *func = NULL; |
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241 #if SDL_VIDEO_OPENGL |
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242 |
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243 if (this->gl_config.dll_handle) { |
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244 func = SDL_LoadFunction(this->gl_config.dll_handle, (void *)proc); |
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245 } else if (this->gl_data->OSMesaGetProcAddress) { |
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246 func = this->gl_data->OSMesaGetProcAddress(proc); |
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247 } |
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248 |
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249 #endif |
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250 return func; |
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251 } |
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252 |
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253 int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) |
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254 { |
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255 #if SDL_VIDEO_OPENGL |
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256 GLenum mesa_attrib; |
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257 SDL_Surface *surface; |
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258 |
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259 if (!gl_active) { |
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260 return -1; |
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261 } |
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262 |
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263 switch(attrib) { |
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264 case SDL_GL_RED_SIZE: |
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265 mesa_attrib = GL_RED_BITS; |
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266 break; |
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267 case SDL_GL_GREEN_SIZE: |
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268 mesa_attrib = GL_GREEN_BITS; |
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269 break; |
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270 case SDL_GL_BLUE_SIZE: |
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271 mesa_attrib = GL_BLUE_BITS; |
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272 break; |
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273 case SDL_GL_ALPHA_SIZE: |
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274 mesa_attrib = GL_ALPHA_BITS; |
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275 break; |
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276 case SDL_GL_DOUBLEBUFFER: |
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277 surface = this->screen; |
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278 *value = ((surface->flags & SDL_DOUBLEBUF)==SDL_DOUBLEBUF); |
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279 return 0; |
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280 case SDL_GL_DEPTH_SIZE: |
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281 mesa_attrib = GL_DEPTH_BITS; |
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282 break; |
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283 case SDL_GL_STENCIL_SIZE: |
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284 mesa_attrib = GL_STENCIL_BITS; |
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285 break; |
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286 case SDL_GL_ACCUM_RED_SIZE: |
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287 mesa_attrib = GL_ACCUM_RED_BITS; |
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288 break; |
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289 case SDL_GL_ACCUM_GREEN_SIZE: |
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290 mesa_attrib = GL_ACCUM_GREEN_BITS; |
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291 break; |
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292 case SDL_GL_ACCUM_BLUE_SIZE: |
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293 mesa_attrib = GL_ACCUM_BLUE_BITS; |
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294 break; |
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295 case SDL_GL_ACCUM_ALPHA_SIZE: |
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296 mesa_attrib = GL_ACCUM_ALPHA_BITS; |
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297 break; |
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298 default : |
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299 return -1; |
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300 } |
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301 |
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302 this->gl_data->glGetIntegerv(mesa_attrib, value); |
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303 return 0; |
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304 #else |
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305 return -1; |
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306 #endif |
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307 } |
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308 |
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309 int SDL_AtariGL_MakeCurrent(_THIS) |
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310 { |
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311 #if SDL_VIDEO_OPENGL |
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312 SDL_Surface *surface; |
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313 GLenum type; |
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314 |
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315 if (gl_oldmesa && gl_active) { |
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316 return 0; |
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317 } |
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318 |
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319 if (this->gl_config.dll_handle) { |
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320 if ((this->gl_data->OSMesaMakeCurrent == NULL) || |
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321 (this->gl_data->OSMesaPixelStore == NULL)) { |
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322 return -1; |
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323 } |
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324 } |
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325 |
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326 if (!gl_active) { |
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327 SDL_SetError("Invalid OpenGL context"); |
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328 return -1; |
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329 } |
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330 |
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331 surface = this->screen; |
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332 |
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333 if ((surface->format->BitsPerPixel == 15) || (surface->format->BitsPerPixel == 16)) { |
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334 type = GL_UNSIGNED_SHORT_5_6_5; |
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335 } else { |
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336 type = GL_UNSIGNED_BYTE; |
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337 } |
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338 |
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339 if (!(this->gl_data->OSMesaMakeCurrent(gl_ctx, surface->pixels, type, surface->w, surface->h))) { |
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340 SDL_SetError("Can not make OpenGL context current"); |
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341 return -1; |
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342 } |
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343 |
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344 /* OSMesa draws upside down */ |
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345 this->gl_data->OSMesaPixelStore(OSMESA_Y_UP, 0); |
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346 |
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347 return 0; |
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348 #else |
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349 return -1; |
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350 #endif |
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351 } |
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352 |
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353 void SDL_AtariGL_SwapBuffers(_THIS) |
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354 { |
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355 #if SDL_VIDEO_OPENGL |
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356 if (gl_active) { |
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357 if (this->gl_config.dll_handle) { |
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358 if (this->gl_data->glFinish) { |
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359 this->gl_data->glFinish(); |
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360 } else if (this->gl_data->glFlush) { |
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361 this->gl_data->glFlush(); |
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362 } |
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363 } else { |
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364 this->gl_data->glFinish(); |
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365 } |
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366 gl_copyshadow(this, this->screen); |
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367 gl_convert(this, this->screen); |
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368 } |
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369 #endif |
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370 } |
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371 |
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372 void SDL_AtariGL_InitPointers(_THIS) |
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373 { |
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374 #if SDL_VIDEO_OPENGL |
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375 this->gl_data->OSMesaCreateContextExt = OSMesaCreateContextExt; |
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376 this->gl_data->OSMesaDestroyContext = OSMesaDestroyContext; |
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377 this->gl_data->OSMesaMakeCurrent = OSMesaMakeCurrent; |
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378 this->gl_data->OSMesaPixelStore = OSMesaPixelStore; |
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379 this->gl_data->OSMesaGetProcAddress = OSMesaGetProcAddress; |
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380 |
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381 this->gl_data->glGetIntegerv = glGetIntegerv; |
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382 this->gl_data->glFinish = glFinish; |
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383 this->gl_data->glFlush = glFlush; |
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384 |
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385 this->gl_data->OSMesaCreateLDG = NULL; |
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386 this->gl_data->OSMesaDestroyLDG = NULL; |
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387 #endif |
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388 } |
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389 |
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390 /*--- Private functions ---*/ |
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391 |
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392 static void SDL_AtariGL_UnloadLibrary(_THIS) |
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393 { |
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394 #if SDL_VIDEO_OPENGL |
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395 if (this->gl_config.dll_handle) { |
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396 SDL_UnloadObject(this->gl_config.dll_handle); |
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397 this->gl_config.dll_handle = NULL; |
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398 |
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399 /* Restore pointers to static library */ |
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400 SDL_AtariGL_InitPointers(this); |
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401 } |
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402 #endif |
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403 } |
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404 |
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405 /*--- Creation of an OpenGL context using new/old functions ---*/ |
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406 |
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407 #if SDL_VIDEO_OPENGL |
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408 static int InitNew(_THIS, SDL_Surface *current) |
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409 { |
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410 GLenum osmesa_format; |
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411 SDL_PixelFormat *pixel_format; |
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412 Uint32 redmask; |
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413 int recreatecontext; |
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414 GLint newaccumsize; |
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415 |
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416 if (this->gl_config.dll_handle) { |
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417 if (this->gl_data->OSMesaCreateContextExt == NULL) { |
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418 return 0; |
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419 } |
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420 } |
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421 |
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422 /* Init OpenGL context using OSMesa */ |
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423 gl_convert = ConvertNull; |
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424 gl_copyshadow = CopyShadowNull; |
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425 gl_upsidedown = SDL_FALSE; |
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426 |
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427 pixel_format = current->format; |
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428 redmask = pixel_format->Rmask; |
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429 switch (pixel_format->BitsPerPixel) { |
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430 case 15: |
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431 /* 1555, big and little endian, unsupported */ |
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432 gl_pixelsize = 2; |
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433 osmesa_format = OSMESA_RGB_565; |
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434 if (redmask == 31<<10) { |
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435 gl_convert = Convert565To555be; |
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436 } else { |
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437 gl_convert = Convert565To555le; |
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438 } |
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439 break; |
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440 case 16: |
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441 gl_pixelsize = 2; |
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442 if (redmask == 31<<11) { |
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443 osmesa_format = OSMESA_RGB_565; |
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444 } else { |
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445 /* 565, little endian, unsupported */ |
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446 osmesa_format = OSMESA_RGB_565; |
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447 gl_convert = Convert565le; |
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448 } |
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449 break; |
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450 case 24: |
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451 gl_pixelsize = 3; |
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452 if (redmask == 255<<16) { |
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453 osmesa_format = OSMESA_RGB; |
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454 } else { |
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455 osmesa_format = OSMESA_BGR; |
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456 } |
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457 break; |
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458 case 32: |
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459 gl_pixelsize = 4; |
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460 if (redmask == 255<<16) { |
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461 osmesa_format = OSMESA_ARGB; |
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462 } else if (redmask == 255<<8) { |
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463 osmesa_format = OSMESA_BGRA; |
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464 } else if (redmask == 255<<24) { |
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465 osmesa_format = OSMESA_RGBA; |
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466 } else { |
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467 /* ABGR format unsupported */ |
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468 osmesa_format = OSMESA_BGRA; |
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469 gl_convert = ConvertBGRAToABGR; |
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470 } |
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471 break; |
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472 default: |
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473 gl_pixelsize = 1; |
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474 osmesa_format = OSMESA_COLOR_INDEX; |
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475 break; |
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476 } |
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477 |
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478 /* Try to keep current context if possible */ |
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479 newaccumsize = |
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480 this->gl_config.accum_red_size + |
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481 this->gl_config.accum_green_size + |
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482 this->gl_config.accum_blue_size + |
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483 this->gl_config.accum_alpha_size; |
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484 recreatecontext=1; |
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485 if (gl_ctx && |
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486 (gl_curformat == osmesa_format) && |
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487 (gl_curdepth == this->gl_config.depth_size) && |
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488 (gl_curstencil == this->gl_config.stencil_size) && |
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489 (gl_curaccum == newaccumsize)) { |
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490 recreatecontext = 0; |
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491 } |
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492 if (recreatecontext) { |
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493 SDL_AtariGL_Quit(this, SDL_FALSE); |
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494 |
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495 gl_ctx = this->gl_data->OSMesaCreateContextExt( |
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496 osmesa_format, this->gl_config.depth_size, |
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497 this->gl_config.stencil_size, newaccumsize, NULL ); |
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498 |
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499 if (gl_ctx) { |
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500 gl_curformat = osmesa_format; |
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501 gl_curdepth = this->gl_config.depth_size; |
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502 gl_curstencil = this->gl_config.stencil_size; |
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503 gl_curaccum = newaccumsize; |
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504 } else { |
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505 gl_curformat = 0; |
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506 gl_curdepth = 0; |
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507 gl_curstencil = 0; |
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508 gl_curaccum = 0; |
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509 } |
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510 } |
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511 |
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512 return (gl_ctx != NULL); |
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513 } |
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514 |
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515 |
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516 static int InitOld(_THIS, SDL_Surface *current) |
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517 { |
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518 GLenum osmesa_format; |
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519 SDL_PixelFormat *pixel_format; |
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520 Uint32 redmask; |
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521 int recreatecontext, tinygl_present; |
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522 |
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523 if (this->gl_config.dll_handle) { |
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524 if (this->gl_data->OSMesaCreateLDG == NULL) { |
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525 return 0; |
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526 } |
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527 } |
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528 |
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529 /* TinyGL only supports VDI_RGB (OSMESA_RGB) */ |
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530 tinygl_present=0; |
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531 if (this->gl_config.dll_handle) { |
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532 if (this->gl_data->glFinish == NULL) { |
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533 tinygl_present=1; |
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534 } |
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535 } |
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536 |
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537 /* Init OpenGL context using OSMesa */ |
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538 gl_convert = ConvertNull; |
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539 gl_copyshadow = CopyShadowNull; |
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540 gl_upsidedown = SDL_FALSE; |
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541 |
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542 pixel_format = current->format; |
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543 redmask = pixel_format->Rmask; |
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544 switch (pixel_format->BitsPerPixel) { |
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545 case 15: |
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546 /* 15 bits unsupported */ |
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547 if (tinygl_present) { |
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548 gl_pixelsize = 3; |
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549 osmesa_format = VDI_RGB; |
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550 if (redmask == 31<<10) { |
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551 gl_copyshadow = CopyShadowRGBTo555; |
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552 } else { |
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553 gl_copyshadow = CopyShadowRGBTo565; |
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554 gl_convert = Convert565To555le; |
|
555 } |
|
556 } else { |
|
557 gl_pixelsize = 4; |
|
558 gl_upsidedown = SDL_TRUE; |
|
559 osmesa_format = OSMESA_ARGB; |
|
560 if (redmask == 31<<10) { |
|
561 gl_copyshadow = CopyShadow8888To555; |
|
562 } else { |
|
563 gl_copyshadow = CopyShadow8888To565; |
|
564 gl_convert = Convert565To555le; |
|
565 } |
|
566 } |
|
567 break; |
|
568 case 16: |
|
569 /* 16 bits unsupported */ |
|
570 if (tinygl_present) { |
|
571 gl_pixelsize = 3; |
|
572 osmesa_format = VDI_RGB; |
|
573 gl_copyshadow = CopyShadowRGBTo565; |
|
574 if (redmask != 31<<11) { |
|
575 /* 565, little endian, unsupported */ |
|
576 gl_convert = Convert565le; |
|
577 } |
|
578 } else { |
|
579 gl_pixelsize = 4; |
|
580 gl_upsidedown = SDL_TRUE; |
|
581 osmesa_format = OSMESA_ARGB; |
|
582 gl_copyshadow = CopyShadow8888To565; |
|
583 if (redmask != 31<<11) { |
|
584 /* 565, little endian, unsupported */ |
|
585 gl_convert = Convert565le; |
|
586 } |
|
587 } |
|
588 break; |
|
589 case 24: |
|
590 gl_pixelsize = 3; |
|
591 if (tinygl_present) { |
|
592 osmesa_format = VDI_RGB; |
|
593 gl_copyshadow = CopyShadowDirect; |
|
594 if (redmask != 255<<16) { |
|
595 gl_copyshadow = CopyShadowRGBSwap; |
|
596 } |
|
597 } else { |
|
598 gl_copyshadow = CopyShadowDirect; |
|
599 gl_upsidedown = SDL_TRUE; |
|
600 if (redmask == 255<<16) { |
|
601 osmesa_format = OSMESA_RGB; |
|
602 } else { |
|
603 osmesa_format = OSMESA_BGR; |
|
604 } |
|
605 } |
|
606 break; |
|
607 case 32: |
|
608 if (tinygl_present) { |
|
609 gl_pixelsize = 3; |
|
610 osmesa_format = VDI_RGB; |
|
611 gl_copyshadow = CopyShadowRGBToARGB; |
|
612 if (redmask == 255) { |
|
613 gl_convert = CopyShadowRGBToABGR; |
|
614 } else if (redmask == 255<<8) { |
|
615 gl_convert = CopyShadowRGBToBGRA; |
|
616 } else if (redmask == 255<<24) { |
|
617 gl_convert = CopyShadowRGBToRGBA; |
|
618 } |
|
619 } else { |
|
620 gl_pixelsize = 4; |
|
621 gl_upsidedown = SDL_TRUE; |
|
622 gl_copyshadow = CopyShadowDirect; |
|
623 if (redmask == 255<<16) { |
|
624 osmesa_format = OSMESA_ARGB; |
|
625 } else if (redmask == 255<<8) { |
|
626 osmesa_format = OSMESA_BGRA; |
|
627 } else if (redmask == 255<<24) { |
|
628 osmesa_format = OSMESA_RGBA; |
|
629 } else { |
|
630 /* ABGR format unsupported */ |
|
631 osmesa_format = OSMESA_BGRA; |
|
632 gl_convert = ConvertBGRAToABGR; |
|
633 } |
|
634 } |
|
635 break; |
|
636 default: |
|
637 if (tinygl_present) { |
|
638 SDL_AtariGL_Quit(this, SDL_FALSE); |
|
639 return 0; |
|
640 } |
|
641 gl_pixelsize = 1; |
|
642 gl_copyshadow = CopyShadowDirect; |
|
643 osmesa_format = OSMESA_COLOR_INDEX; |
|
644 break; |
|
645 } |
|
646 |
|
647 /* Try to keep current context if possible */ |
|
648 recreatecontext=1; |
|
649 if (gl_shadow && |
|
650 (gl_curformat == osmesa_format) && |
|
651 (gl_curwidth == current->w) && |
|
652 (gl_curheight == current->h)) { |
|
653 recreatecontext = 0; |
|
654 } |
|
655 if (recreatecontext) { |
|
656 SDL_AtariGL_Quit(this, SDL_FALSE); |
|
657 |
|
658 gl_shadow = this->gl_data->OSMesaCreateLDG( |
|
659 osmesa_format, GL_UNSIGNED_BYTE, current->w, current->h |
|
660 ); |
|
661 |
|
662 if (gl_shadow) { |
|
663 gl_curformat = osmesa_format; |
|
664 gl_curwidth = current->w; |
|
665 gl_curheight = current->h; |
|
666 } else { |
|
667 gl_curformat = 0; |
|
668 gl_curwidth = 0; |
|
669 gl_curheight = 0; |
|
670 } |
|
671 } |
|
672 |
|
673 return (gl_shadow != NULL); |
|
674 } |
|
675 |
|
676 /*--- Conversions routines from shadow buffer to the screen ---*/ |
|
677 |
|
678 static void CopyShadowNull(_THIS, SDL_Surface *surface) |
|
679 { |
|
680 } |
|
681 |
|
682 static void CopyShadowDirect(_THIS, SDL_Surface *surface) |
|
683 { |
|
684 int y, srcpitch, dstpitch; |
|
685 Uint8 *srcline, *dstline; |
|
686 |
|
687 srcline = gl_shadow; |
|
688 srcpitch = surface->w * gl_pixelsize; |
|
689 dstline = surface->pixels; |
|
690 dstpitch = surface->pitch; |
|
691 if (gl_upsidedown) { |
|
692 srcline += (surface->h-1)*srcpitch; |
|
693 srcpitch = -srcpitch; |
|
694 } |
|
695 |
|
696 for (y=0; y<surface->h; y++) { |
|
697 SDL_memcpy(dstline, srcline, srcpitch); |
|
698 |
|
699 srcline += srcpitch; |
|
700 dstline += dstpitch; |
|
701 } |
|
702 } |
|
703 |
|
704 static void CopyShadowRGBTo555(_THIS, SDL_Surface *surface) |
|
705 { |
|
706 int x,y, srcpitch, dstpitch; |
|
707 Uint16 *dstline, *dstcol; |
|
708 Uint8 *srcline, *srccol; |
|
709 |
|
710 srcline = (Uint8 *)gl_shadow; |
|
711 srcpitch = surface->w * gl_pixelsize; |
|
712 dstline = surface->pixels; |
|
713 dstpitch = surface->pitch >>1; |
|
714 if (gl_upsidedown) { |
|
715 srcline += (surface->h-1)*srcpitch; |
|
716 srcpitch = -srcpitch; |
|
717 } |
|
718 |
|
719 for (y=0; y<surface->h; y++) { |
|
720 srccol = srcline; |
|
721 dstcol = dstline; |
|
722 for (x=0; x<surface->w; x++) { |
|
723 Uint16 dstcolor; |
|
724 |
|
725 dstcolor = ((*srccol++)<<7) & (31<<10); |
|
726 dstcolor |= ((*srccol++)<<2) & (31<<5); |
|
727 dstcolor |= ((*srccol++)>>3) & 31; |
|
728 *dstcol++ = dstcolor; |
|
729 } |
|
730 |
|
731 srcline += srcpitch; |
|
732 dstline += dstpitch; |
|
733 } |
|
734 } |
|
735 |
|
736 static void CopyShadowRGBTo565(_THIS, SDL_Surface *surface) |
|
737 { |
|
738 int x,y, srcpitch, dstpitch; |
|
739 Uint16 *dstline, *dstcol; |
|
740 Uint8 *srcline, *srccol; |
|
741 |
|
742 srcline = (Uint8 *)gl_shadow; |
|
743 srcpitch = surface->w * gl_pixelsize; |
|
744 dstline = surface->pixels; |
|
745 dstpitch = surface->pitch >>1; |
|
746 if (gl_upsidedown) { |
|
747 srcline += (surface->h-1)*srcpitch; |
|
748 srcpitch = -srcpitch; |
|
749 } |
|
750 |
|
751 for (y=0; y<surface->h; y++) { |
|
752 srccol = srcline; |
|
753 dstcol = dstline; |
|
754 |
|
755 for (x=0; x<surface->w; x++) { |
|
756 Uint16 dstcolor; |
|
757 |
|
758 dstcolor = ((*srccol++)<<8) & (31<<11); |
|
759 dstcolor |= ((*srccol++)<<3) & (63<<5); |
|
760 dstcolor |= ((*srccol++)>>3) & 31; |
|
761 *dstcol++ = dstcolor; |
|
762 } |
|
763 |
|
764 srcline += srcpitch; |
|
765 dstline += dstpitch; |
|
766 } |
|
767 } |
|
768 |
|
769 static void CopyShadowRGBSwap(_THIS, SDL_Surface *surface) |
|
770 { |
|
771 int x,y, srcpitch, dstpitch; |
|
772 Uint8 *dstline, *dstcol; |
|
773 Uint8 *srcline, *srccol; |
|
774 |
|
775 srcline = (Uint8 *)gl_shadow; |
|
776 srcpitch = surface->w * gl_pixelsize; |
|
777 dstline = surface->pixels; |
|
778 dstpitch = surface->pitch; |
|
779 if (gl_upsidedown) { |
|
780 srcline += (surface->h-1)*srcpitch; |
|
781 srcpitch = -srcpitch; |
|
782 } |
|
783 |
|
784 for (y=0; y<surface->h; y++) { |
|
785 srccol = srcline; |
|
786 dstcol = dstline; |
|
787 |
|
788 for (x=0; x<surface->w; x++) { |
|
789 *dstcol++ = srccol[2]; |
|
790 *dstcol++ = srccol[1]; |
|
791 *dstcol++ = srccol[0]; |
|
792 srccol += 3; |
|
793 } |
|
794 |
|
795 srcline += srcpitch; |
|
796 dstline += dstpitch; |
|
797 } |
|
798 } |
|
799 |
|
800 static void CopyShadowRGBToARGB(_THIS, SDL_Surface *surface) |
|
801 { |
|
802 int x,y, srcpitch, dstpitch; |
|
803 Uint32 *dstline, *dstcol; |
|
804 Uint8 *srcline, *srccol; |
|
805 |
|
806 srcline = (Uint8 *)gl_shadow; |
|
807 srcpitch = surface->w * gl_pixelsize; |
|
808 dstline = surface->pixels; |
|
809 dstpitch = surface->pitch >>2; |
|
810 if (gl_upsidedown) { |
|
811 srcline += (surface->h-1)*srcpitch; |
|
812 srcpitch = -srcpitch; |
|
813 } |
|
814 |
|
815 for (y=0; y<surface->h; y++) { |
|
816 srccol = srcline; |
|
817 dstcol = dstline; |
|
818 |
|
819 for (x=0; x<surface->w; x++) { |
|
820 Uint32 dstcolor; |
|
821 |
|
822 dstcolor = (*srccol++)<<16; |
|
823 dstcolor |= (*srccol++)<<8; |
|
824 dstcolor |= *srccol++; |
|
825 |
|
826 *dstcol++ = dstcolor; |
|
827 } |
|
828 |
|
829 srcline += srcpitch; |
|
830 dstline += dstpitch; |
|
831 } |
|
832 } |
|
833 |
|
834 static void CopyShadowRGBToABGR(_THIS, SDL_Surface *surface) |
|
835 { |
|
836 int x,y, srcpitch, dstpitch; |
|
837 Uint32 *dstline, *dstcol; |
|
838 Uint8 *srcline, *srccol; |
|
839 |
|
840 srcline = (Uint8 *)gl_shadow; |
|
841 srcpitch = surface->w * gl_pixelsize; |
|
842 dstline = surface->pixels; |
|
843 dstpitch = surface->pitch >>2; |
|
844 if (gl_upsidedown) { |
|
845 srcline += (surface->h-1)*srcpitch; |
|
846 srcpitch = -srcpitch; |
|
847 } |
|
848 |
|
849 for (y=0; y<surface->h; y++) { |
|
850 srccol = srcline; |
|
851 dstcol = dstline; |
|
852 |
|
853 for (x=0; x<surface->w; x++) { |
|
854 Uint32 dstcolor; |
|
855 |
|
856 dstcolor = *srccol++; |
|
857 dstcolor |= (*srccol++)<<8; |
|
858 dstcolor |= (*srccol++)<<16; |
|
859 |
|
860 *dstcol++ = dstcolor; |
|
861 } |
|
862 |
|
863 srcline += srcpitch; |
|
864 dstline += dstpitch; |
|
865 } |
|
866 } |
|
867 |
|
868 static void CopyShadowRGBToBGRA(_THIS, SDL_Surface *surface) |
|
869 { |
|
870 int x,y, srcpitch, dstpitch; |
|
871 Uint32 *dstline, *dstcol; |
|
872 Uint8 *srcline, *srccol; |
|
873 |
|
874 srcline = (Uint8 *)gl_shadow; |
|
875 srcpitch = surface->w * gl_pixelsize; |
|
876 dstline = surface->pixels; |
|
877 dstpitch = surface->pitch >>2; |
|
878 if (gl_upsidedown) { |
|
879 srcline += (surface->h-1)*srcpitch; |
|
880 srcpitch = -srcpitch; |
|
881 } |
|
882 |
|
883 for (y=0; y<surface->h; y++) { |
|
884 srccol = srcline; |
|
885 dstcol = dstline; |
|
886 |
|
887 for (x=0; x<surface->w; x++) { |
|
888 Uint32 dstcolor; |
|
889 |
|
890 dstcolor = (*srccol++)<<8; |
|
891 dstcolor |= (*srccol++)<<16; |
|
892 dstcolor |= (*srccol++)<<24; |
|
893 |
|
894 *dstcol++ = dstcolor; |
|
895 } |
|
896 |
|
897 srcline += srcpitch; |
|
898 dstline += dstpitch; |
|
899 } |
|
900 } |
|
901 |
|
902 static void CopyShadowRGBToRGBA(_THIS, SDL_Surface *surface) |
|
903 { |
|
904 int x,y, srcpitch, dstpitch; |
|
905 Uint32 *dstline, *dstcol; |
|
906 Uint8 *srcline, *srccol; |
|
907 |
|
908 srcline = (Uint8 *)gl_shadow; |
|
909 srcpitch = surface->w * gl_pixelsize; |
|
910 dstline = surface->pixels; |
|
911 dstpitch = surface->pitch >>2; |
|
912 if (gl_upsidedown) { |
|
913 srcline += (surface->h-1)*srcpitch; |
|
914 srcpitch = -srcpitch; |
|
915 } |
|
916 |
|
917 for (y=0; y<surface->h; y++) { |
|
918 srccol = srcline; |
|
919 dstcol = dstline; |
|
920 |
|
921 for (x=0; x<surface->w; x++) { |
|
922 Uint32 dstcolor; |
|
923 |
|
924 dstcolor = (*srccol++)<<24; |
|
925 dstcolor |= (*srccol++)<<16; |
|
926 dstcolor |= (*srccol++)<<8; |
|
927 |
|
928 *dstcol++ = dstcolor; |
|
929 } |
|
930 |
|
931 srcline += srcpitch; |
|
932 dstline += dstpitch; |
|
933 } |
|
934 } |
|
935 |
|
936 static void CopyShadow8888To555(_THIS, SDL_Surface *surface) |
|
937 { |
|
938 int x,y, srcpitch, dstpitch; |
|
939 Uint16 *dstline, *dstcol; |
|
940 Uint32 *srcline, *srccol; |
|
941 |
|
942 srcline = (Uint32 *)gl_shadow; |
|
943 srcpitch = (surface->w * gl_pixelsize) >>2; |
|
944 dstline = surface->pixels; |
|
945 dstpitch = surface->pitch >>1; |
|
946 if (gl_upsidedown) { |
|
947 srcline += (surface->h-1)*srcpitch; |
|
948 srcpitch = -srcpitch; |
|
949 } |
|
950 |
|
951 for (y=0; y<surface->h; y++) { |
|
952 srccol = srcline; |
|
953 dstcol = dstline; |
|
954 for (x=0; x<surface->w; x++) { |
|
955 Uint32 srccolor; |
|
956 Uint16 dstcolor; |
|
957 |
|
958 srccolor = *srccol++; |
|
959 dstcolor = (srccolor>>9) & (31<<10); |
|
960 dstcolor |= (srccolor>>6) & (31<<5); |
|
961 dstcolor |= (srccolor>>3) & 31; |
|
962 *dstcol++ = dstcolor; |
|
963 } |
|
964 |
|
965 srcline += srcpitch; |
|
966 dstline += dstpitch; |
|
967 } |
|
968 } |
|
969 |
|
970 static void CopyShadow8888To565(_THIS, SDL_Surface *surface) |
|
971 { |
|
972 int x,y, srcpitch, dstpitch; |
|
973 Uint16 *dstline, *dstcol; |
|
974 Uint32 *srcline, *srccol; |
|
975 |
|
976 srcline = (Uint32 *)gl_shadow; |
|
977 srcpitch = (surface->w * gl_pixelsize) >> 2; |
|
978 dstline = surface->pixels; |
|
979 dstpitch = surface->pitch >>1; |
|
980 if (gl_upsidedown) { |
|
981 srcline += (surface->h-1)*srcpitch; |
|
982 srcpitch = -srcpitch; |
|
983 } |
|
984 |
|
985 for (y=0; y<surface->h; y++) { |
|
986 srccol = srcline; |
|
987 dstcol = dstline; |
|
988 |
|
989 for (x=0; x<surface->w; x++) { |
|
990 Uint32 srccolor; |
|
991 Uint16 dstcolor; |
|
992 |
|
993 srccolor = *srccol++; |
|
994 dstcolor = (srccolor>>8) & (31<<11); |
|
995 dstcolor |= (srccolor>>5) & (63<<5); |
|
996 dstcolor |= (srccolor>>3) & 31; |
|
997 *dstcol++ = dstcolor; |
|
998 } |
|
999 |
|
1000 srcline += srcpitch; |
|
1001 dstline += dstpitch; |
|
1002 } |
|
1003 } |
|
1004 |
|
1005 /*--- Conversions routines in the screen ---*/ |
|
1006 |
|
1007 static void ConvertNull(_THIS, SDL_Surface *surface) |
|
1008 { |
|
1009 } |
|
1010 |
|
1011 static void Convert565To555be(_THIS, SDL_Surface *surface) |
|
1012 { |
|
1013 int x,y, pitch; |
|
1014 unsigned short *line, *pixel; |
|
1015 |
|
1016 line = surface->pixels; |
|
1017 pitch = surface->pitch >> 1; |
|
1018 for (y=0; y<surface->h; y++) { |
|
1019 pixel = line; |
|
1020 for (x=0; x<surface->w; x++) { |
|
1021 unsigned short color = *pixel; |
|
1022 |
|
1023 *pixel++ = (color & 0x1f)|((color>>1) & 0xffe0); |
|
1024 } |
|
1025 |
|
1026 line += pitch; |
|
1027 } |
|
1028 } |
|
1029 |
|
1030 static void Convert565To555le(_THIS, SDL_Surface *surface) |
|
1031 { |
|
1032 int x,y, pitch; |
|
1033 unsigned short *line, *pixel; |
|
1034 |
|
1035 line = surface->pixels; |
|
1036 pitch = surface->pitch >>1; |
|
1037 for (y=0; y<surface->h; y++) { |
|
1038 pixel = line; |
|
1039 for (x=0; x<surface->w; x++) { |
|
1040 unsigned short color = *pixel; |
|
1041 |
|
1042 color = (color & 0x1f)|((color>>1) & 0xffe0); |
|
1043 *pixel++ = SDL_Swap16(color); |
|
1044 } |
|
1045 |
|
1046 line += pitch; |
|
1047 } |
|
1048 } |
|
1049 |
|
1050 static void Convert565le(_THIS, SDL_Surface *surface) |
|
1051 { |
|
1052 int x,y, pitch; |
|
1053 unsigned short *line, *pixel; |
|
1054 |
|
1055 line = surface->pixels; |
|
1056 pitch = surface->pitch >>1; |
|
1057 for (y=0; y<surface->h; y++) { |
|
1058 pixel = line; |
|
1059 for (x=0; x<surface->w; x++) { |
|
1060 unsigned short color = *pixel; |
|
1061 |
|
1062 *pixel++ = SDL_Swap16(color); |
|
1063 } |
|
1064 |
|
1065 line += pitch; |
|
1066 } |
|
1067 } |
|
1068 |
|
1069 static void ConvertBGRAToABGR(_THIS, SDL_Surface *surface) |
|
1070 { |
|
1071 int x,y, pitch; |
|
1072 unsigned long *line, *pixel; |
|
1073 |
|
1074 line = surface->pixels; |
|
1075 pitch = surface->pitch >>2; |
|
1076 for (y=0; y<surface->h; y++) { |
|
1077 pixel = line; |
|
1078 for (x=0; x<surface->w; x++) { |
|
1079 unsigned long color = *pixel; |
|
1080 |
|
1081 *pixel++ = (color<<24)|(color>>8); |
|
1082 } |
|
1083 |
|
1084 line += pitch; |
|
1085 } |
|
1086 } |
|
1087 |
|
1088 #endif /* SDL_VIDEO_OPENGL */ |