annotate src/video/fbcon/SDL_fb3dfx.c @ 78:e9582f471c02

Added the environment variable SDL_MOUSE_NORELATIVE to completely disable relative mouse motion if the application desires it. UNDOCUMENTED!!
author Sam Lantinga <slouken@lokigames.com>
date Sat, 23 Jun 2001 18:51:29 +0000
parents 74212992fb08
children 63ec24e0575f
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, 1998, 1999, 2000, 2001 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@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #include "SDL_types.h"
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29 #include "SDL_video.h"
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30 #include "SDL_blit.h"
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31 #include "SDL_fb3dfx.h"
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32 #include "3dfx_mmio.h"
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33
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34
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35 static int LockHWSurface(_THIS, SDL_Surface *surface)
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36 {
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37 if ( surface == SDL_VideoSurface ) {
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38 tdfx_waitidle();
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39 }
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40 return(0);
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41 }
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42 static void UnlockHWSurface(_THIS, SDL_Surface *surface)
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43 {
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44 return;
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45 }
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46
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47 /* Wait for vertical retrace */
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48 static void WaitVBL(_THIS)
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49 {
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50 /* find start of retrace */
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51 tdfx_waitidle();
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52 while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE )
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53 ;
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54 /* wait until we're past the start */
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55 while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == 0 )
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56 ;
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57 }
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58
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59 /* Sets video mem colorkey and accelerated blit function */
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60 static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
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61 {
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62 return(0);
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63 }
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64
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65 static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
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66 {
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67 int bpp;
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68 char *dst_base;
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69 Uint32 format;
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70 int dstX, dstY;
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71
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72 /* Set the destination pixel format */
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73 dst_base = (char *)((char *)dst->pixels - mapped_mem);
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74 bpp = dst->format->BitsPerPixel;
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75 format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
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76
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77 /* Calculate source and destination base coordinates */
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78 dstX = rect->x;
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79 dstY = rect->y;
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80
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81 /* Execute the fill command */
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82 tdfx_wait(6);
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83 tdfx_out32(DSTBASE, (Uint32)dst_base);
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84 tdfx_out32(DSTFORMAT, format);
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85 tdfx_out32(COLORFORE, color);
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86 tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT);
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87 tdfx_out32(DSTSIZE, rect->w | (rect->h << 16));
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88 tdfx_out32(LAUNCH_2D, dstX | (dstY << 16));
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89 return(0);
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90 }
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91
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92 static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
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93 SDL_Surface *dst, SDL_Rect *dstrect)
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94 {
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95 SDL_VideoDevice *this;
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96 int bpp;
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97 Uint32 src_format;
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98 Uint32 dst_format;
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99 char *src_base;
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100 char *dst_base;
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101 int srcX, srcY;
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102 int dstX, dstY;
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103 Uint32 blitop;
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104 Uint32 use_colorkey;
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105
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106 /* Set the source and destination pixel format */
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107 this = current_video;
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108 src_base = (char *)((char *)src->pixels - mapped_mem);
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109 bpp = src->format->BitsPerPixel;
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110 src_format = src->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
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111 dst_base = (char *)((char *)dst->pixels - mapped_mem);
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112 bpp = dst->format->BitsPerPixel;
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113 dst_format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
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114
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115 srcX = srcrect->x;
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116 srcY = srcrect->y;
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117 dstX = dstrect->x;
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118 dstY = dstrect->y;
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119
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120 /* Assemble the blit operation */
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121 blitop = COMMAND_2D_BITBLT | (0xCC << 24);
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122 if ( srcX <= dstX ) {
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123 blitop |= BIT(14);
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124 srcX += (dstrect->w - 1);
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125 dstX += (dstrect->w - 1);
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126 }
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127 if ( srcY <= dstY ) {
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128 blitop |= BIT(15);
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129 srcY += (dstrect->h - 1);
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130 dstY += (dstrect->h - 1);
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131 }
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132
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133 /* Perform the blit! */
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134 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
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135 tdfx_wait(3);
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136 tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey);
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137 tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey);
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138 tdfx_out32(ROP_2D, 0xAA00);
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139 use_colorkey = 1;
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140 } else {
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141 use_colorkey = 0;
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142 }
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143 tdfx_wait(9);
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144 tdfx_out32(SRCBASE, (Uint32)src_base);
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145 tdfx_out32(SRCFORMAT, src_format);
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146 tdfx_out32(DSTBASE, (Uint32)dst_base);
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147 tdfx_out32(DSTFORMAT, src_format);
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148 tdfx_out32(COMMAND_2D, blitop);
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149 tdfx_out32(COMMANDEXTRA_2D, use_colorkey);
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150 tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16));
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151 tdfx_out32(DSTXY, dstX | (dstY << 16));
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152 tdfx_out32(LAUNCH_2D, srcX | (srcY << 16));
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153
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154 return(0);
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155 }
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156
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157 static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
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158 {
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159 int accelerated;
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160
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161 /* Set initial acceleration on */
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162 src->flags |= SDL_HWACCEL;
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163
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164 /* Set the surface attributes */
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165 if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
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166 if ( ! this->info.blit_hw_A ) {
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167 src->flags &= ~SDL_HWACCEL;
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168 }
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169 }
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170 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
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171 if ( ! this->info.blit_hw_CC ) {
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172 src->flags &= ~SDL_HWACCEL;
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173 }
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174 }
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175
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176 /* Check to see if final surface blit is accelerated */
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177 accelerated = !!(src->flags & SDL_HWACCEL);
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178 if ( accelerated ) {
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179 src->map->hw_blit = HWAccelBlit;
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180 }
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181 return(accelerated);
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182 }
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183
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184 void FB_3DfxAccel(_THIS, __u32 card)
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185 {
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186 /* We have hardware accelerated surface functions */
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187 this->CheckHWBlit = CheckHWBlit;
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188 this->LockHWSurface = LockHWSurface;
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189 this->UnlockHWSurface = UnlockHWSurface;
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190 wait_vbl = WaitVBL;
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191
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192 /* Reset the 3Dfx controller */
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193 tdfx_out32(BRESERROR0, 0);
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194 tdfx_out32(BRESERROR1, 0);
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195
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196 /* The 3Dfx has an accelerated color fill */
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197 this->info.blit_fill = 1;
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198 this->FillHWRect = FillHWRect;
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199
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200 /* The 3Dfx has accelerated normal and colorkey blits */
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201 this->info.blit_hw = 1;
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202 this->info.blit_hw_CC = 1;
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203 this->SetHWColorKey = SetHWColorKey;
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204 }