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annotate src/video/fbcon/SDL_fbriva.c @ 1023:e719ee25439d

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Fix potential use of freed memory in the threaded timer system
author Sam Lantinga <slouken@libsdl.org>
date Tue, 04 Jan 2005 19:05:32 +0000
parents 3d4f1930ed02
children c9b51268668f
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
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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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e8157fcb3114 Updated the source with the correct e-mail address
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20 slouken@libsdl.org
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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_fbriva.h"
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32 #include "riva_mmio.h"
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33 #include "riva_regs.h"
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34
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35
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36 static int FifoEmptyCount = 0;
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37 static int FifoFreeCount = 0;
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38
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39 /* Wait for vertical retrace */
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40 static void WaitVBL(_THIS)
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41 {
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42 volatile Uint8 *port = (Uint8 *)(mapped_io + PCIO_OFFSET + 0x3DA);
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43
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44 while ( (*port & 0x08) )
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45 ;
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46 while ( !(*port & 0x08) )
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47 ;
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48 }
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49 static void NV3WaitIdle(_THIS)
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50 {
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51 RivaRop *Rop = (RivaRop *)(mapped_io + ROP_OFFSET);
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52 while ( (Rop->FifoFree < FifoEmptyCount) ||
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53 (*(mapped_io + PGRAPH_OFFSET + 0x000006B0) & 0x01) )
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54 ;
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55 }
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56 static void NV4WaitIdle(_THIS)
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57 {
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58 RivaRop *Rop = (RivaRop *)(mapped_io + ROP_OFFSET);
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59 while ( (Rop->FifoFree < FifoEmptyCount) ||
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60 (*(mapped_io + PGRAPH_OFFSET + 0x00000700) & 0x01) )
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61 ;
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62 }
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63
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64 #if 0 /* Not yet implemented? */
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65 /* Sets video mem colorkey and accelerated blit function */
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66 static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
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67 {
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68 return(0);
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69 }
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70
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71 /* Sets per surface hardware alpha value */
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72 static int SetHWAlpha(_THIS, SDL_Surface *surface, Uint8 value)
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73 {
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74 return(0);
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75 }
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76 #endif /* Not yet implemented */
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77
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78 static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
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79 {
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80 int dstX, dstY;
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81 int dstW, dstH;
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82 RivaBitmap *Bitmap = (RivaBitmap *)(mapped_io + BITMAP_OFFSET);
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83
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84 /* Don't blit to the display surface when switched away */
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85 if ( dst == this->screen ) {
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86 SDL_mutexP(hw_lock);
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87 }
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88
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89 /* Set up the X/Y base coordinates */
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90 dstW = rect->w;
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91 dstH = rect->h;
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92 FB_dst_to_xy(this, dst, &dstX, &dstY);
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93
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94 /* Adjust for the current rectangle */
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95 dstX += rect->x;
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96 dstY += rect->y;
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97
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98 RIVA_FIFO_FREE(Bitmap, 1);
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99 Bitmap->Color1A = color;
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100
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101 RIVA_FIFO_FREE(Bitmap, 2);
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102 Bitmap->UnclippedRectangle[0].TopLeft = (dstX << 16) | dstY;
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103 Bitmap->UnclippedRectangle[0].WidthHeight = (dstW << 16) | dstH;
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104
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105 FB_AddBusySurface(dst);
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106
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107 if ( dst == this->screen ) {
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108 SDL_mutexV(hw_lock);
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109 }
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110 return(0);
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111 }
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112
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113 static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
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114 SDL_Surface *dst, SDL_Rect *dstrect)
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115 {
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116 SDL_VideoDevice *this = current_video;
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117 int srcX, srcY;
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118 int dstX, dstY;
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119 int dstW, dstH;
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120 RivaScreenBlt *Blt = (RivaScreenBlt *)(mapped_io + BLT_OFFSET);
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121
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122 /* FIXME: For now, only blit to display surface */
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123 if ( dst->pitch != SDL_VideoSurface->pitch ) {
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124 return(src->map->sw_blit(src, srcrect, dst, dstrect));
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125 }
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126
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127 /* Don't blit to the display surface when switched away */
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128 if ( dst == this->screen ) {
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129 SDL_mutexP(hw_lock);
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130 }
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131
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132 /* Calculate source and destination base coordinates (in pixels) */
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133 dstW = dstrect->w;
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134 dstH = dstrect->h;
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135 FB_dst_to_xy(this, src, &srcX, &srcY);
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136 FB_dst_to_xy(this, dst, &dstX, &dstY);
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137
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138 /* Adjust for the current blit rectangles */
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139 srcX += srcrect->x;
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140 srcY += srcrect->y;
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141 dstX += dstrect->x;
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142 dstY += dstrect->y;
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143
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144 RIVA_FIFO_FREE(Blt, 3);
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145 Blt->TopLeftSrc = (srcY << 16) | srcX;
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146 Blt->TopLeftDst = (dstY << 16) | dstX;
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147 Blt->WidthHeight = (dstH << 16) | dstW;
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148
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149 FB_AddBusySurface(src);
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150 FB_AddBusySurface(dst);
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151
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152 if ( dst == this->screen ) {
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153 SDL_mutexV(hw_lock);
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154 }
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155 return(0);
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156 }
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157
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158 static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
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159 {
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160 int accelerated;
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161
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162 /* Set initial acceleration on */
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163 src->flags |= SDL_HWACCEL;
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164
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165 /* Set the surface attributes */
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166 if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
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167 if ( ! this->info.blit_hw_A ) {
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168 src->flags &= ~SDL_HWACCEL;
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169 }
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170 }
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171 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
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172 if ( ! this->info.blit_hw_CC ) {
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173 src->flags &= ~SDL_HWACCEL;
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174 }
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175 }
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176
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177 /* Check to see if final surface blit is accelerated */
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178 accelerated = !!(src->flags & SDL_HWACCEL);
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179 if ( accelerated ) {
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180 src->map->hw_blit = HWAccelBlit;
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181 }
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182 return(accelerated);
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183 }
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184
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185 void FB_RivaAccel(_THIS, __u32 card)
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186 {
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187 RivaRop *Rop = (RivaRop *)(mapped_io + ROP_OFFSET);
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188
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189 /* We have hardware accelerated surface functions */
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190 this->CheckHWBlit = CheckHWBlit;
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191 wait_vbl = WaitVBL;
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192 switch (card) {
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193 case FB_ACCEL_NV3:
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194 wait_idle = NV3WaitIdle;
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195 break;
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196 case FB_ACCEL_NV4:
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197 wait_idle = NV4WaitIdle;
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198 break;
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199 default:
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200 /* Hmm... FIXME */
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201 break;
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202 }
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203 FifoEmptyCount = Rop->FifoFree;
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204
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205 /* The Riva has an accelerated color fill */
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206 this->info.blit_fill = 1;
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207 this->FillHWRect = FillHWRect;
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208
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209 /* The Riva has accelerated normal and colorkey blits. */
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210 this->info.blit_hw = 1;
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211 #if 0 /* Not yet implemented? */
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212 this->info.blit_hw_CC = 1;
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213 this->SetHWColorKey = SetHWColorKey;
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214 #endif
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215
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216 #if 0 /* Not yet implemented? */
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217 /* The Riva has an accelerated alpha blit */
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218 this->info.blit_hw_A = 1;
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219 this->SetHWAlpha = SetHWAlpha;
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220 #endif
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221 }