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annotate src/video/ataricommon/SDL_atarigl.c @ 989:475166d13b44

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Factorize OSMesa OpenGL code for Atari drivers
author Patrice Mandin <patmandin@gmail.com>
date Thu, 25 Nov 2004 15:47:49 +0000
parents
children 12b13601a544
rev   line source
989
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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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 /* Atari OSMesa.ldg implementation of SDL OpenGL support */
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24
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25 /*--- Includes ---*/
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26
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27 #ifdef HAVE_OPENGL
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28 #include <GL/osmesa.h>
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29 #endif
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30
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31 #include "SDL_video.h"
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32 #include "SDL_error.h"
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33 #include "SDL_endian.h"
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34 #include "SDL_atarigl_c.h"
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35
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36 /*--- Variables ---*/
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37
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38 /*--- Functions prototypes ---*/
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39
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40 static void ConvertNull(SDL_Surface *surface);
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41 static void Convert565To555be(SDL_Surface *surface);
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42 static void Convert565To555le(SDL_Surface *surface);
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43 static void Convert565le(SDL_Surface *surface);
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44 static void ConvertBGRAToABGR(SDL_Surface *surface);
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45
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46 /*--- Public functions ---*/
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47
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48 int SDL_AtariGL_Init(_THIS, SDL_Surface *current)
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49 {
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50 #ifdef HAVE_OPENGL
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51 GLenum osmesa_format;
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52 SDL_PixelFormat *pixel_format;
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53 Uint32 redmask;
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54
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55 SDL_AtariGL_Quit(this); /* Destroy previous context if exist */
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56
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57 /* Init OpenGL context using OSMesa */
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58 gl_convert = ConvertNull;
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59
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60 pixel_format = current->format;
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61 redmask = pixel_format->Rmask;
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62 switch (pixel_format->BitsPerPixel) {
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63 case 15:
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64 /* 1555, big and little endian, unsupported */
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65 osmesa_format = OSMESA_RGB_565;
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66 if (redmask == 31<<10) {
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67 gl_convert = Convert565To555be;
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68 } else {
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69 gl_convert = Convert565To555le;
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70 }
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71 break;
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72 case 16:
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73 if (redmask == 31<<11) {
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74 osmesa_format = OSMESA_RGB_565;
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75 } else {
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76 /* 565, little endian, unsupported */
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77 osmesa_format = OSMESA_RGB_565;
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78 gl_convert = Convert565le;
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79 }
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80 break;
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81 case 24:
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82 if (redmask == 255<<16) {
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83 osmesa_format = OSMESA_RGB;
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84 } else {
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85 osmesa_format = OSMESA_BGR;
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86 }
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87 break;
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88 case 32:
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89 if (redmask == 255<<16) {
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90 osmesa_format = OSMESA_ARGB;
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91 } else if (redmask == 255<<8) {
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92 osmesa_format = OSMESA_BGRA;
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93 } else if (redmask == 255<<24) {
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94 osmesa_format = OSMESA_RGBA;
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95 } else {
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96 /* ABGR format unsupported */
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97 osmesa_format = OSMESA_BGRA;
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98 gl_convert = ConvertBGRAToABGR;
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99 }
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100 break;
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101 default:
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102 osmesa_format = OSMESA_COLOR_INDEX;
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103 break;
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104 }
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105
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106 gl_ctx = OSMesaCreateContextExt( osmesa_format, this->gl_config.depth_size,
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107 this->gl_config.stencil_size, this->gl_config.accum_red_size +
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108 this->gl_config.accum_green_size + this->gl_config.accum_blue_size +
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109 this->gl_config.accum_alpha_size, NULL );
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110
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111 gl_active = (gl_ctx != NULL);
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112 return (gl_active);
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113 #else
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114 return 0;
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115 #endif
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116 }
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117
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118 void SDL_AtariGL_Quit(_THIS)
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119 {
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120 #ifdef HAVE_OPENGL
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121 /* Shutdown OpenGL context */
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122 if (gl_ctx) {
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123 OSMesaDestroyContext(gl_ctx);
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124 gl_ctx = NULL;
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125 }
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126 #endif
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127 gl_active = 0;
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128 }
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129
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130 int SDL_AtariGL_LoadLibrary(_THIS, const char *path)
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131 {
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132 #ifdef HAVE_OPENGL
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133 /* Library is always opened */
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134 this->gl_config.driver_loaded = 1;
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135 #endif
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136 return 0;
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137 }
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138
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139 void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc)
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140 {
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141 void *func = NULL;
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142 #ifdef HAVE_OPENGL
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143 if (gl_ctx != NULL) {
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144 func = OSMesaGetProcAddress(proc);
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145 }
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146 #endif
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147 return func;
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148 }
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149
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parents:
diff changeset
150 int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
151 {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
152 #ifdef HAVE_OPENGL
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
153 GLenum mesa_attrib;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
154 SDL_Surface *surface;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
155
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
156 if (gl_ctx == NULL) {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
157 return -1;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
158 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
159
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
160 switch(attrib) {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
161 case SDL_GL_RED_SIZE:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
162 mesa_attrib = GL_RED_BITS;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
163 break;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
164 case SDL_GL_GREEN_SIZE:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
165 mesa_attrib = GL_GREEN_BITS;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
166 break;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
167 case SDL_GL_BLUE_SIZE:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
168 mesa_attrib = GL_BLUE_BITS;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
169 break;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
170 case SDL_GL_ALPHA_SIZE:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
171 mesa_attrib = GL_ALPHA_BITS;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
172 break;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
173 case SDL_GL_DOUBLEBUFFER:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
174 surface = this->screen;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
175 *value = ((surface->flags & SDL_DOUBLEBUF)==SDL_DOUBLEBUF);
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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176 return 0;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
177 case SDL_GL_DEPTH_SIZE:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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178 mesa_attrib = GL_DEPTH_BITS;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
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diff changeset
179 break;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
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diff changeset
180 case SDL_GL_STENCIL_SIZE:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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181 mesa_attrib = GL_STENCIL_BITS;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
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diff changeset
182 break;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
183 case SDL_GL_ACCUM_RED_SIZE:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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184 mesa_attrib = GL_ACCUM_RED_BITS;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
185 break;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
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diff changeset
186 case SDL_GL_ACCUM_GREEN_SIZE:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
187 mesa_attrib = GL_ACCUM_GREEN_BITS;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
188 break;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
189 case SDL_GL_ACCUM_BLUE_SIZE:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
190 mesa_attrib = GL_ACCUM_BLUE_BITS;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
191 break;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
192 case SDL_GL_ACCUM_ALPHA_SIZE:
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
193 mesa_attrib = GL_ACCUM_ALPHA_BITS;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
194 break;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
195 default :
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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196 return -1;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
197 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
198
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
199 glGetIntegerv(mesa_attrib, value);
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
200 return 0;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
201 #else
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
202 return -1;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
203 #endif
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
204 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
205
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
206 int SDL_AtariGL_MakeCurrent(_THIS)
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
207 {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
208 #ifdef HAVE_OPENGL
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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diff changeset
209 SDL_Surface *surface;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
210 GLenum type;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
211
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
212 if (gl_ctx == NULL) {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
213 SDL_SetError("Invalid OpenGL context");
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
214 return -1;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
215 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
216
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
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diff changeset
217 surface = this->screen;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
218
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
219 if ((surface->format->BitsPerPixel == 15) || (surface->format->BitsPerPixel == 16)) {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
220 type = GL_UNSIGNED_SHORT_5_6_5;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
221 } else {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
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parents:
diff changeset
222 type = GL_UNSIGNED_BYTE;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
223 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
224
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
225 if (!OSMesaMakeCurrent(gl_ctx, surface->pixels, type, surface->w, surface->h)) {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
226 SDL_SetError("Can not make OpenGL context current");
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
227 return -1;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
228 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
229
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
230 /* OSMesa draws upside down */
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
231 OSMesaPixelStore(OSMESA_Y_UP, 0);
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
232
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
233 return 0;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
234 #else
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
235 return -1;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
236 #endif
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
237 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
238
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
239 void SDL_AtariGL_SwapBuffers(_THIS)
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
240 {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
241 #ifdef HAVE_OPENGL
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
242 if (gl_ctx == NULL) {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
243 return;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
244 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
245
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
246 gl_convert(this->screen);
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
247 #endif
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
248 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
249
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
250 /*--- Private functions ---*/
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
251
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
252 static void ConvertNull(SDL_Surface *surface)
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
253 {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
254 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
255
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
256 static void Convert565To555be(SDL_Surface *surface)
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
257 {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
258 int x,y, pitch;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
259 unsigned short *line, *pixel;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
260
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
261 line = surface->pixels;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
262 pitch = surface->pitch >> 1;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
263 for (y=0; y<surface->h; y++) {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
264 pixel = line;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
265 for (x=0; x<surface->w; x++) {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
266 unsigned short color = *pixel;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
267
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
268 *pixel++ = (color & 0x1f)|((color>>1) & 0xffe0);
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
269 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
270
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
271 line += pitch;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
272 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
273 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
274
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
275 static void Convert565To555le(SDL_Surface *surface)
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
276 {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
277 int x,y, pitch;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
278 unsigned short *line, *pixel;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
279
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
280 line = surface->pixels;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
281 pitch = surface->pitch >>1;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
282 for (y=0; y<surface->h; y++) {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
283 pixel = line;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
284 for (x=0; x<surface->w; x++) {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
285 unsigned short color = *pixel;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
286
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
287 color = (color & 0x1f)|((color>>1) & 0xffe0);
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
288 *pixel++ = SDL_Swap16(color);
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
289 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
290
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
291 line += pitch;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
292 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
293 }
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
294
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
295 static void Convert565le(SDL_Surface *surface)
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
296 {
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
297 int x,y, pitch;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
298 unsigned short *line, *pixel;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
299
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
300 line = surface->pixels;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
301 pitch = surface->pitch >>1;
475166d13b44 Factorize OSMesa OpenGL code for Atari drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
302 for (y=0; y<surface->h; y++) {
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303 pixel = line;
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304 for (x=0; x<surface->w; x++) {
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305 unsigned short color = *pixel;
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306
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307 *pixel++ = SDL_Swap16(color);
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308 }
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309
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310 line += pitch;
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311 }
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312 }
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313
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314 static void ConvertBGRAToABGR(SDL_Surface *surface)
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315 {
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316 int x,y, pitch;
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317 unsigned long *line, *pixel;
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318
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319 line = surface->pixels;
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320 pitch = surface->pitch >>2;
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321 for (y=0; y<surface->h; y++) {
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322 pixel = line;
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323 for (x=0; x<surface->w; x++) {
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324 unsigned long color = *pixel;
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325
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326 *pixel++ = (color<<24)|(color>>8);
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327 }
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328
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329 line += pitch;
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330 }
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331 }