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annotate src/video/fbcon/SDL_fbriva.c @ 1643:51038e80ae59

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More general fix for bug #189 The clipping is done at a higher level, and the low level functions are passed clipped rectangles. Drivers which don't support source clipping have not been changed, so the image will be squished instead of clipped, but at least they will no longer crash when the destination rect was out of bounds.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 17 Apr 2006 06:47:23 +0000
parents d910939febfa
children 14717b52abc0
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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24 #include "SDL_video.h"
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25 #include "../SDL_blit.h"
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26 #include "SDL_fbriva.h"
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27 #include "riva_mmio.h"
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28 #include "riva_regs.h"
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30
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31 static int FifoEmptyCount = 0;
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32 static int FifoFreeCount = 0;
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33
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34 /* Wait for vertical retrace */
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35 static void WaitVBL(_THIS)
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36 {
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37 volatile Uint8 *port = (Uint8 *)(mapped_io + PCIO_OFFSET + 0x3DA);
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38
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39 while ( (*port & 0x08) )
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40 ;
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41 while ( !(*port & 0x08) )
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42 ;
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43 }
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44 static void NV3WaitIdle(_THIS)
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45 {
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46 RivaRop *Rop = (RivaRop *)(mapped_io + ROP_OFFSET);
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47 while ( (Rop->FifoFree < FifoEmptyCount) ||
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48 (*(mapped_io + PGRAPH_OFFSET + 0x000006B0) & 0x01) )
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49 ;
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50 }
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51 static void NV4WaitIdle(_THIS)
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52 {
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53 RivaRop *Rop = (RivaRop *)(mapped_io + ROP_OFFSET);
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54 while ( (Rop->FifoFree < FifoEmptyCount) ||
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55 (*(mapped_io + PGRAPH_OFFSET + 0x00000700) & 0x01) )
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56 ;
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57 }
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58
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59 #if 0 /* Not yet implemented? */
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60 /* Sets video mem colorkey and accelerated blit function */
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61 static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
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62 {
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63 return(0);
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64 }
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65
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66 /* Sets per surface hardware alpha value */
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67 static int SetHWAlpha(_THIS, SDL_Surface *surface, Uint8 value)
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68 {
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69 return(0);
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70 }
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71 #endif /* Not yet implemented */
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72
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73 static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
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74 {
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75 int dstX, dstY;
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76 int dstW, dstH;
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77 RivaBitmap *Bitmap = (RivaBitmap *)(mapped_io + BITMAP_OFFSET);
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78
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79 /* Don't blit to the display surface when switched away */
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80 if ( dst == this->screen ) {
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81 SDL_mutexP(hw_lock);
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82 }
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83
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84 /* Set up the X/Y base coordinates */
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85 dstW = rect->w;
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86 dstH = rect->h;
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87 FB_dst_to_xy(this, dst, &dstX, &dstY);
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88
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89 /* Adjust for the current rectangle */
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90 dstX += rect->x;
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91 dstY += rect->y;
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92
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93 RIVA_FIFO_FREE(Bitmap, 1);
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94 Bitmap->Color1A = color;
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95
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96 RIVA_FIFO_FREE(Bitmap, 2);
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97 Bitmap->UnclippedRectangle[0].TopLeft = (dstX << 16) | dstY;
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98 Bitmap->UnclippedRectangle[0].WidthHeight = (dstW << 16) | dstH;
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99
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100 FB_AddBusySurface(dst);
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101
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102 if ( dst == this->screen ) {
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103 SDL_mutexV(hw_lock);
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104 }
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105 return(0);
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106 }
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107
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108 static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
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109 SDL_Surface *dst, SDL_Rect *dstrect)
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110 {
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111 SDL_VideoDevice *this = current_video;
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112 int srcX, srcY;
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113 int dstX, dstY;
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114 int dstW, dstH;
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115 RivaScreenBlt *Blt = (RivaScreenBlt *)(mapped_io + BLT_OFFSET);
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116
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117 /* FIXME: For now, only blit to display surface */
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118 if ( dst->pitch != SDL_VideoSurface->pitch ) {
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119 return(src->map->sw_blit(src, srcrect, dst, dstrect));
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120 }
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121
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122 /* Don't blit to the display surface when switched away */
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123 if ( dst == this->screen ) {
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124 SDL_mutexP(hw_lock);
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125 }
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126
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127 /* Calculate source and destination base coordinates (in pixels) */
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128 dstW = dstrect->w;
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129 dstH = dstrect->h;
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130 FB_dst_to_xy(this, src, &srcX, &srcY);
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131 FB_dst_to_xy(this, dst, &dstX, &dstY);
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132
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133 /* Adjust for the current blit rectangles */
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134 srcX += srcrect->x;
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135 srcY += srcrect->y;
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136 dstX += dstrect->x;
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137 dstY += dstrect->y;
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138
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139 RIVA_FIFO_FREE(Blt, 3);
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140 Blt->TopLeftSrc = (srcY << 16) | srcX;
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141 Blt->TopLeftDst = (dstY << 16) | dstX;
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142 Blt->WidthHeight = (dstH << 16) | dstW;
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143
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144 FB_AddBusySurface(src);
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145 FB_AddBusySurface(dst);
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146
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147 if ( dst == this->screen ) {
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148 SDL_mutexV(hw_lock);
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149 }
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150 return(0);
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151 }
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152
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153 static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
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154 {
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155 int accelerated;
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156
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157 /* Set initial acceleration on */
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158 src->flags |= SDL_HWACCEL;
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159
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160 /* Set the surface attributes */
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161 if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
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162 if ( ! this->info.blit_hw_A ) {
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163 src->flags &= ~SDL_HWACCEL;
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164 }
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165 }
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166 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
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167 if ( ! this->info.blit_hw_CC ) {
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168 src->flags &= ~SDL_HWACCEL;
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169 }
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170 }
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171
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172 /* Check to see if final surface blit is accelerated */
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173 accelerated = !!(src->flags & SDL_HWACCEL);
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174 if ( accelerated ) {
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175 src->map->hw_blit = HWAccelBlit;
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176 }
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177 return(accelerated);
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178 }
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179
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180 void FB_RivaAccel(_THIS, __u32 card)
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181 {
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182 RivaRop *Rop = (RivaRop *)(mapped_io + ROP_OFFSET);
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183
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184 /* We have hardware accelerated surface functions */
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185 this->CheckHWBlit = CheckHWBlit;
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186 wait_vbl = WaitVBL;
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187 switch (card) {
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188 case FB_ACCEL_NV3:
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189 wait_idle = NV3WaitIdle;
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190 break;
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191 case FB_ACCEL_NV4:
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192 wait_idle = NV4WaitIdle;
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193 break;
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194 default:
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195 /* Hmm... FIXME */
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196 break;
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197 }
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198 FifoEmptyCount = Rop->FifoFree;
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199
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200 /* The Riva has an accelerated color fill */
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201 this->info.blit_fill = 1;
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202 this->FillHWRect = FillHWRect;
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203
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204 /* The Riva has accelerated normal and colorkey blits. */
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205 this->info.blit_hw = 1;
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206 #if 0 /* Not yet implemented? */
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207 this->info.blit_hw_CC = 1;
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208 this->SetHWColorKey = SetHWColorKey;
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209 #endif
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210
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211 #if 0 /* Not yet implemented? */
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212 /* The Riva has an accelerated alpha blit */
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213 this->info.blit_hw_A = 1;
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214 this->SetHWAlpha = SetHWAlpha;
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215 #endif
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216 }