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annotate src/video/fbcon/SDL_fbriva.c @ 240:529ba31e8679

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Include the README files with the source distribution
author Sam Lantinga <slouken@libsdl.org>
date Thu, 22 Nov 2001 03:43:57 +0000
parents f1550e1c4916
children e8157fcb3114
rev   line source
133
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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_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 /* Sets video mem colorkey and accelerated blit function */
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65 static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
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66 {
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67 return(0);
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68 }
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69
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70 /* Sets per surface hardware alpha value */
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71 static int SetHWAlpha(_THIS, SDL_Surface *surface, Uint8 value)
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72 {
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73 return(0);
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74 }
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75
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76 static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
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77 {
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78 int dstX, dstY;
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79 int dstW, dstH;
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80 RivaBitmap *Bitmap = (RivaBitmap *)(mapped_io + BITMAP_OFFSET);
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81
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82 /* Don't blit to the display surface when switched away */
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83 if ( dst == this->screen ) {
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84 SDL_mutexP(hw_lock);
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85 }
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86
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87 /* Set up the X/Y base coordinates */
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88 dstW = rect->w;
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89 dstH = rect->h;
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90 FB_dst_to_xy(this, dst, &dstX, &dstY);
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91
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92 /* Adjust for the current rectangle */
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93 dstX += rect->x;
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94 dstY += rect->y;
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95
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96 RIVA_FIFO_FREE(Bitmap, 1);
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97 Bitmap->Color1A = color;
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98
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99 RIVA_FIFO_FREE(Bitmap, 2);
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100 Bitmap->UnclippedRectangle[0].TopLeft = (dstX << 16) | dstY;
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101 Bitmap->UnclippedRectangle[0].WidthHeight = (dstW << 16) | dstH;
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102
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103 FB_AddBusySurface(dst);
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104
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105 if ( dst == this->screen ) {
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106 SDL_mutexV(hw_lock);
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107 }
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108 return(0);
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109 }
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110
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111 static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
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112 SDL_Surface *dst, SDL_Rect *dstrect)
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113 {
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114 SDL_VideoDevice *this = current_video;
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115 int srcX, srcY;
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116 int dstX, dstY;
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117 int dstW, dstH;
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118 RivaScreenBlt *Blt = (RivaScreenBlt *)(mapped_io + BLT_OFFSET);
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119
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120 /* FIXME: For now, only blit to display surface */
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121 if ( dst->pitch != SDL_VideoSurface->pitch ) {
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122 return(src->map->sw_blit(src, srcrect, dst, dstrect));
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123 }
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124
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125 /* Don't blit to the display surface when switched away */
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126 if ( dst == this->screen ) {
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127 SDL_mutexP(hw_lock);
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128 }
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129
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130 /* Calculate source and destination base coordinates (in pixels) */
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131 dstW = dstrect->w;
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132 dstH = dstrect->h;
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133 FB_dst_to_xy(this, src, &srcX, &srcY);
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134 FB_dst_to_xy(this, dst, &dstX, &dstY);
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135
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136 /* Adjust for the current blit rectangles */
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137 srcX += srcrect->x;
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138 srcY += srcrect->y;
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139 dstX += dstrect->x;
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140 dstY += dstrect->y;
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141
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142 RIVA_FIFO_FREE(Blt, 3);
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143 Blt->TopLeftSrc = (srcY << 16) | srcX;
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144 Blt->TopLeftDst = (dstY << 16) | dstX;
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145 Blt->WidthHeight = (dstH << 16) | dstW;
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146
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147 FB_AddBusySurface(src);
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148 FB_AddBusySurface(dst);
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149
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150 if ( dst == this->screen ) {
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151 SDL_mutexV(hw_lock);
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152 }
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153 return(0);
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154 }
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155
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156 static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
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157 {
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158 int accelerated;
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159
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160 /* Set initial acceleration on */
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161 src->flags |= SDL_HWACCEL;
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162
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163 /* Set the surface attributes */
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164 if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
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165 if ( ! this->info.blit_hw_A ) {
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166 src->flags &= ~SDL_HWACCEL;
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167 }
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168 }
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169 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
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170 if ( ! this->info.blit_hw_CC ) {
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171 src->flags &= ~SDL_HWACCEL;
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172 }
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173 }
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174
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175 /* Check to see if final surface blit is accelerated */
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176 accelerated = !!(src->flags & SDL_HWACCEL);
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177 if ( accelerated ) {
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178 src->map->hw_blit = HWAccelBlit;
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179 }
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180 return(accelerated);
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181 }
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182
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183 void FB_RivaAccel(_THIS, __u32 card)
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184 {
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185 RivaRop *Rop = (RivaRop *)(mapped_io + ROP_OFFSET);
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186
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187 /* We have hardware accelerated surface functions */
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188 this->CheckHWBlit = CheckHWBlit;
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189 wait_vbl = WaitVBL;
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190 switch (card) {
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191 case FB_ACCEL_NV3:
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192 wait_idle = NV3WaitIdle;
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193 break;
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194 case FB_ACCEL_NV4:
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195 wait_idle = NV4WaitIdle;
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196 break;
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197 default:
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198 /* Hmm... FIXME */
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199 break;
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200 }
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201 FifoEmptyCount = Rop->FifoFree;
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202
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203 /* The Riva 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 Riva has accelerated normal and colorkey blits. */
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208 this->info.blit_hw = 1;
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209 #if 0 /* Not yet implemented? */
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210 this->info.blit_hw_CC = 1;
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211 this->SetHWColorKey = SetHWColorKey;
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212 #endif
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213
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214 #if 0 /* Not yet implemented? */
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215 /* The Riva has an accelerated alpha blit */
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216 this->info.blit_hw_A = 1;
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217 this->SetHWAlpha = SetHWAlpha;
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218 #endif
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219 }