annotate src/video/fbcon/SDL_fb3dfx.c @ 1341:d02b552e5304

Configure dynamically generates SDL_config.h I'm still wrestling with autoheader, but this should work for now... Fixed lots of build problems with C library support disabled
author Sam Lantinga <slouken@libsdl.org>
date Tue, 07 Feb 2006 12:11:33 +0000
parents c9b51268668f
children c71e05b4dc2e
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
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23 #include "SDL_types.h"
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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 WaitVBL(_THIS)
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32 {
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33 /* find start of retrace */
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34 tdfx_waitidle();
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35 while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE )
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36 ;
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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 }
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41 static void 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 SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
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48 {
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49 return(0);
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50 }
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51
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52 static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
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53 {
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54 int bpp;
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55 char *dst_base;
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56 Uint32 format;
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57 int dstX, dstY;
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58
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59 /* Don't blit to the display surface when switched away */
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60 if ( dst == this->screen ) {
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61 SDL_mutexP(hw_lock);
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62 }
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63
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64 /* Set the destination pixel format */
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65 dst_base = (char *)((char *)dst->pixels - mapped_mem);
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66 bpp = dst->format->BitsPerPixel;
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67 format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
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68
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69 /* Calculate source and destination base coordinates */
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70 dstX = rect->x;
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71 dstY = rect->y;
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72
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73 /* Execute the fill command */
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74 tdfx_wait(6);
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75 tdfx_out32(DSTBASE, (Uint32)dst_base);
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76 tdfx_out32(DSTFORMAT, format);
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77 tdfx_out32(COLORFORE, color);
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78 tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT);
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79 tdfx_out32(DSTSIZE, rect->w | (rect->h << 16));
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80 tdfx_out32(LAUNCH_2D, dstX | (dstY << 16));
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81
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82 FB_AddBusySurface(dst);
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83
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84 if ( dst == this->screen ) {
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85 SDL_mutexV(hw_lock);
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86 }
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87 return(0);
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88 }
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89
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90 static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
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91 SDL_Surface *dst, SDL_Rect *dstrect)
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92 {
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93 SDL_VideoDevice *this = current_video;
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94 int bpp;
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95 Uint32 src_format;
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96 Uint32 dst_format;
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97 char *src_base;
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98 char *dst_base;
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99 int srcX, srcY;
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100 int dstX, dstY;
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101 Uint32 blitop;
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102 Uint32 use_colorkey;
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103
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104 /* Don't blit to the display surface when switched away */
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105 if ( dst == this->screen ) {
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106 SDL_mutexP(hw_lock);
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107 }
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108
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109 /* Set the source and destination pixel format */
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110 src_base = (char *)((char *)src->pixels - mapped_mem);
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111 bpp = src->format->BitsPerPixel;
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112 src_format = src->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
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113 dst_base = (char *)((char *)dst->pixels - mapped_mem);
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114 bpp = dst->format->BitsPerPixel;
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115 dst_format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
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116
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117 srcX = srcrect->x;
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118 srcY = srcrect->y;
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119 dstX = dstrect->x;
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120 dstY = dstrect->y;
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121
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122 /* Assemble the blit operation */
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123 blitop = COMMAND_2D_BITBLT | (0xCC << 24);
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124 if ( srcX <= dstX ) {
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125 blitop |= BIT(14);
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126 srcX += (dstrect->w - 1);
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127 dstX += (dstrect->w - 1);
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128 }
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129 if ( srcY <= dstY ) {
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130 blitop |= BIT(15);
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131 srcY += (dstrect->h - 1);
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132 dstY += (dstrect->h - 1);
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133 }
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134
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135 /* Perform the blit! */
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136 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
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137 tdfx_wait(3);
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138 tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey);
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139 tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey);
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140 tdfx_out32(ROP_2D, 0xAA00);
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141 use_colorkey = 1;
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142 } else {
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143 use_colorkey = 0;
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144 }
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145 tdfx_wait(9);
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146 tdfx_out32(SRCBASE, (Uint32)src_base);
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147 tdfx_out32(SRCFORMAT, src_format);
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148 tdfx_out32(DSTBASE, (Uint32)dst_base);
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149 tdfx_out32(DSTFORMAT, src_format);
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150 tdfx_out32(COMMAND_2D, blitop);
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151 tdfx_out32(COMMANDEXTRA_2D, use_colorkey);
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152 tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16));
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153 tdfx_out32(DSTXY, dstX | (dstY << 16));
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154 tdfx_out32(LAUNCH_2D, srcX | (srcY << 16));
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155
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156 FB_AddBusySurface(src);
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157 FB_AddBusySurface(dst);
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158
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159 if ( dst == this->screen ) {
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160 SDL_mutexV(hw_lock);
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161 }
0
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162 return(0);
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163 }
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164
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165 static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
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166 {
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167 int accelerated;
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168
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169 /* Set initial acceleration on */
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170 src->flags |= SDL_HWACCEL;
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171
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172 /* Set the surface attributes */
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173 if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
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174 if ( ! this->info.blit_hw_A ) {
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175 src->flags &= ~SDL_HWACCEL;
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176 }
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177 }
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178 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
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179 if ( ! this->info.blit_hw_CC ) {
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180 src->flags &= ~SDL_HWACCEL;
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181 }
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182 }
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183
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184 /* Check to see if final surface blit is accelerated */
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185 accelerated = !!(src->flags & SDL_HWACCEL);
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186 if ( accelerated ) {
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187 src->map->hw_blit = HWAccelBlit;
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188 }
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189 return(accelerated);
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190 }
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191
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192 void FB_3DfxAccel(_THIS, __u32 card)
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193 {
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194 /* We have hardware accelerated surface functions */
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195 this->CheckHWBlit = CheckHWBlit;
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196 wait_vbl = WaitVBL;
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197 wait_idle = WaitIdle;
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198
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199 /* Reset the 3Dfx controller */
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200 tdfx_out32(BRESERROR0, 0);
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201 tdfx_out32(BRESERROR1, 0);
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202
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203 /* The 3Dfx has an accelerated color fill */
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204 this->info.blit_fill = 1;
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205 this->FillHWRect = FillHWRect;
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206
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207 /* The 3Dfx has accelerated normal and colorkey blits */
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208 this->info.blit_hw = 1;
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209 this->info.blit_hw_CC = 1;
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210 this->SetHWColorKey = SetHWColorKey;
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211 }