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annotate src/video/fbcon/SDL_fb3dfx.c @ 2185:2032348afed1

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This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is available and to keep people form having to install yet another library I have added the essential parts of Xmu in src/video/extensions/XmuStdCmap and an include file in src/video/extensions. The support makes use of standard X11 mechanisms to create color maps and make sure that an application uses the same color map for each window/visual combination. This should make it possible for gamma support to be implemented based on a single color map per application. Hurm... it looks like "make indent" modified a few extra files. Those are getting committed too.
author Bob Pendleton <bob@pendleton.com>
date Thu, 12 Jul 2007 20:00:50 +0000
parents c121d94672cb
children e1da92da346c
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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 #include "SDL_video.h"
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25 #include "../SDL_blit.h"
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26 #include "SDL_fb3dfx.h"
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27 #include "3dfx_mmio.h"
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28
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29
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30 /* Wait for vertical retrace */
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31 static void
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32 WaitVBL(_THIS)
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33 {
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34 /* find start of retrace */
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35 tdfx_waitidle();
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36 while ((tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE);
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37 /* wait until we're past the start */
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38 while ((tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == 0);
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39 }
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40 static void
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41 WaitIdle(_THIS)
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42 {
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43 tdfx_waitidle();
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44 }
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45
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46 /* Sets video mem colorkey and accelerated blit function */
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47 static int
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48 SetHWColorKey(_THIS, SDL_Surface * surface, Uint32 key)
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49 {
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50 return (0);
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51 }
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52
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53 static int
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54 FillHWRect(_THIS, SDL_Surface * dst, SDL_Rect * rect, Uint32 color)
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55 {
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56 int bpp;
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57 char *dst_base;
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58 Uint32 format;
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59 int dstX, dstY;
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60
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61 /* Don't blit to the display surface when switched away */
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62 if (switched_away) {
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63 return -2; /* no hardware access */
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64 }
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65 if (dst == this->screen) {
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66 SDL_mutexP(hw_lock);
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67 }
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68
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69 /* Set the destination pixel format */
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70 dst_base = (char *) ((char *) dst->pixels - mapped_mem);
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71 bpp = dst->format->BitsPerPixel;
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72 format = dst->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
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73
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74 /* Calculate source and destination base coordinates */
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75 dstX = rect->x;
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76 dstY = rect->y;
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77
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78 /* Execute the fill command */
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79 tdfx_wait(6);
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80 tdfx_out32(DSTBASE, (Uint32) dst_base);
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81 tdfx_out32(DSTFORMAT, format);
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82 tdfx_out32(COLORFORE, color);
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83 tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT);
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84 tdfx_out32(DSTSIZE, rect->w | (rect->h << 16));
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85 tdfx_out32(LAUNCH_2D, dstX | (dstY << 16));
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86
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87 FB_AddBusySurface(dst);
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88
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89 if (dst == this->screen) {
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90 SDL_mutexV(hw_lock);
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91 }
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92 return (0);
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93 }
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94
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95 static int
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96 HWAccelBlit(SDL_Surface * src, SDL_Rect * srcrect,
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97 SDL_Surface * dst, SDL_Rect * dstrect)
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98 {
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99 SDL_VideoDevice *this = current_video;
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100 int bpp;
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101 Uint32 src_format;
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102 Uint32 dst_format;
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103 char *src_base;
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104 char *dst_base;
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105 int srcX, srcY;
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106 int dstX, dstY;
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107 Uint32 blitop;
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108 Uint32 use_colorkey;
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109
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110 /* Don't blit to the display surface when switched away */
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111 if (switched_away) {
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112 return -2; /* no hardware access */
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113 }
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114 if (dst == this->screen) {
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115 SDL_mutexP(hw_lock);
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116 }
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117
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118 /* Set the source and destination pixel format */
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119 src_base = (char *) ((char *) src->pixels - mapped_mem);
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120 bpp = src->format->BitsPerPixel;
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121 src_format = src->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
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122 dst_base = (char *) ((char *) dst->pixels - mapped_mem);
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123 bpp = dst->format->BitsPerPixel;
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124 dst_format = dst->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
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125
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126 srcX = srcrect->x;
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127 srcY = srcrect->y;
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128 dstX = dstrect->x;
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129 dstY = dstrect->y;
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130
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131 /* Assemble the blit operation */
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132 blitop = COMMAND_2D_BITBLT | (0xCC << 24);
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133 if (srcX <= dstX) {
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134 blitop |= BIT(14);
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135 srcX += (dstrect->w - 1);
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136 dstX += (dstrect->w - 1);
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137 }
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138 if (srcY <= dstY) {
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139 blitop |= BIT(15);
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140 srcY += (dstrect->h - 1);
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141 dstY += (dstrect->h - 1);
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142 }
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143
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144 /* Perform the blit! */
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145 if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
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146 tdfx_wait(3);
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147 tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey);
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148 tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey);
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149 tdfx_out32(ROP_2D, 0xAA00);
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150 use_colorkey = 1;
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151 } else {
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152 use_colorkey = 0;
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153 }
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154 tdfx_wait(9);
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155 tdfx_out32(SRCBASE, (Uint32) src_base);
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156 tdfx_out32(SRCFORMAT, src_format);
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157 tdfx_out32(DSTBASE, (Uint32) dst_base);
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158 tdfx_out32(DSTFORMAT, src_format);
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159 tdfx_out32(COMMAND_2D, blitop);
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160 tdfx_out32(COMMANDEXTRA_2D, use_colorkey);
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161 tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16));
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162 tdfx_out32(DSTXY, dstX | (dstY << 16));
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163 tdfx_out32(LAUNCH_2D, srcX | (srcY << 16));
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164
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165 FB_AddBusySurface(src);
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166 FB_AddBusySurface(dst);
106
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167
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168 if (dst == this->screen) {
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169 SDL_mutexV(hw_lock);
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170 }
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171 return (0);
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172 }
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173
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174 static int
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175 CheckHWBlit(_THIS, SDL_Surface * src, SDL_Surface * dst)
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176 {
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177 int accelerated;
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178
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179 /* Set initial acceleration on */
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180 src->flags |= SDL_HWACCEL;
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181
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182 /* Set the surface attributes */
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183 if ((src->flags & SDL_SRCALPHA) == SDL_SRCALPHA) {
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184 if (!this->info.blit_hw_A) {
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185 src->flags &= ~SDL_HWACCEL;
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186 }
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187 }
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188 if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
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189 if (!this->info.blit_hw_CC) {
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190 src->flags &= ~SDL_HWACCEL;
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191 }
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192 }
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193
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194 /* Check to see if final surface blit is accelerated */
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195 accelerated = !!(src->flags & SDL_HWACCEL);
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196 if (accelerated) {
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197 src->map->hw_blit = HWAccelBlit;
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198 }
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199 return (accelerated);
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200 }
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201
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202 void
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203 FB_3DfxAccel(_THIS, __u32 card)
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204 {
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205 /* We have hardware accelerated surface functions */
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206 this->CheckHWBlit = CheckHWBlit;
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207 wait_vbl = WaitVBL;
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208 wait_idle = WaitIdle;
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209
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210 /* Reset the 3Dfx controller */
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211 tdfx_out32(BRESERROR0, 0);
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212 tdfx_out32(BRESERROR1, 0);
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213
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214 /* The 3Dfx has an accelerated color fill */
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215 this->info.blit_fill = 1;
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216 this->FillHWRect = FillHWRect;
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217
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218 /* The 3Dfx has accelerated normal and colorkey blits */
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219 this->info.blit_hw = 1;
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220 this->info.blit_hw_CC = 1;
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221 this->SetHWColorKey = SetHWColorKey;
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222 }
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223
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224 /* vi: set ts=4 sw=4 expandtab: */