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annotate src/video/fbcon/SDL_fb3dfx.c @ 2683:e858ac8868b6 gsoc2008_nds

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Ongoing video render work; initial work on NDS Timers.
author Darren Alton <dalton@stevens.edu>
date Fri, 08 Aug 2008 08:22:08 +0000
parents c121d94672cb
children e1da92da346c
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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23
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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
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32 WaitVBL(_THIS)
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33 {
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34 /* find start of retrace */
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35 tdfx_waitidle();
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36 while ((tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE);
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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 static void
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41 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
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48 SetHWColorKey(_THIS, SDL_Surface * surface, Uint32 key)
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49 {
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50 return (0);
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51 }
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52
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53 static int
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54 FillHWRect(_THIS, SDL_Surface * dst, SDL_Rect * rect, Uint32 color)
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55 {
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56 int bpp;
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57 char *dst_base;
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58 Uint32 format;
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59 int dstX, dstY;
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60
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61 /* Don't blit to the display surface when switched away */
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62 if (switched_away) {
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63 return -2; /* no hardware access */
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64 }
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65 if (dst == this->screen) {
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66 SDL_mutexP(hw_lock);
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67 }
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68
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69 /* Set the destination pixel format */
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70 dst_base = (char *) ((char *) dst->pixels - mapped_mem);
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71 bpp = dst->format->BitsPerPixel;
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72 format = dst->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
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73
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74 /* Calculate source and destination base coordinates */
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75 dstX = rect->x;
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76 dstY = rect->y;
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77
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78 /* Execute the fill command */
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79 tdfx_wait(6);
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80 tdfx_out32(DSTBASE, (Uint32) dst_base);
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81 tdfx_out32(DSTFORMAT, format);
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82 tdfx_out32(COLORFORE, color);
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83 tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT);
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84 tdfx_out32(DSTSIZE, rect->w | (rect->h << 16));
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85 tdfx_out32(LAUNCH_2D, dstX | (dstY << 16));
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86
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87 FB_AddBusySurface(dst);
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88
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89 if (dst == this->screen) {
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90 SDL_mutexV(hw_lock);
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91 }
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92 return (0);
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93 }
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94
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95 static int
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96 HWAccelBlit(SDL_Surface * src, SDL_Rect * srcrect,
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97 SDL_Surface * dst, SDL_Rect * dstrect)
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98 {
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99 SDL_VideoDevice *this = current_video;
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100 int bpp;
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101 Uint32 src_format;
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102 Uint32 dst_format;
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103 char *src_base;
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104 char *dst_base;
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105 int srcX, srcY;
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106 int dstX, dstY;
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107 Uint32 blitop;
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108 Uint32 use_colorkey;
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109
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110 /* Don't blit to the display surface when switched away */
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111 if (switched_away) {
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112 return -2; /* no hardware access */
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113 }
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114 if (dst == this->screen) {
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115 SDL_mutexP(hw_lock);
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116 }
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117
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118 /* Set the source and destination pixel format */
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119 src_base = (char *) ((char *) src->pixels - mapped_mem);
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120 bpp = src->format->BitsPerPixel;
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121 src_format = src->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
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122 dst_base = (char *) ((char *) dst->pixels - mapped_mem);
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123 bpp = dst->format->BitsPerPixel;
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124 dst_format = dst->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
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125
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126 srcX = srcrect->x;
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127 srcY = srcrect->y;
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128 dstX = dstrect->x;
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129 dstY = dstrect->y;
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130
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131 /* Assemble the blit operation */
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132 blitop = COMMAND_2D_BITBLT | (0xCC << 24);
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133 if (srcX <= dstX) {
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134 blitop |= BIT(14);
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135 srcX += (dstrect->w - 1);
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136 dstX += (dstrect->w - 1);
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137 }
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138 if (srcY <= dstY) {
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139 blitop |= BIT(15);
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140 srcY += (dstrect->h - 1);
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141 dstY += (dstrect->h - 1);
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142 }
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143
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144 /* Perform the blit! */
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145 if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
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146 tdfx_wait(3);
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147 tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey);
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148 tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey);
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149 tdfx_out32(ROP_2D, 0xAA00);
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150 use_colorkey = 1;
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151 } else {
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152 use_colorkey = 0;
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153 }
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154 tdfx_wait(9);
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155 tdfx_out32(SRCBASE, (Uint32) src_base);
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156 tdfx_out32(SRCFORMAT, src_format);
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157 tdfx_out32(DSTBASE, (Uint32) dst_base);
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158 tdfx_out32(DSTFORMAT, src_format);
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159 tdfx_out32(COMMAND_2D, blitop);
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160 tdfx_out32(COMMANDEXTRA_2D, use_colorkey);
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161 tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16));
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162 tdfx_out32(DSTXY, dstX | (dstY << 16));
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163 tdfx_out32(LAUNCH_2D, srcX | (srcY << 16));
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164
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165 FB_AddBusySurface(src);
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166 FB_AddBusySurface(dst);
106
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167
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168 if (dst == this->screen) {
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169 SDL_mutexV(hw_lock);
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170 }
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171 return (0);
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172 }
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173
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174 static int
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175 CheckHWBlit(_THIS, SDL_Surface * src, SDL_Surface * dst)
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176 {
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177 int accelerated;
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178
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179 /* Set initial acceleration on */
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180 src->flags |= SDL_HWACCEL;
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181
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182 /* Set the surface attributes */
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183 if ((src->flags & SDL_SRCALPHA) == SDL_SRCALPHA) {
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184 if (!this->info.blit_hw_A) {
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185 src->flags &= ~SDL_HWACCEL;
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186 }
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187 }
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188 if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
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189 if (!this->info.blit_hw_CC) {
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190 src->flags &= ~SDL_HWACCEL;
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191 }
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192 }
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193
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194 /* Check to see if final surface blit is accelerated */
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195 accelerated = !!(src->flags & SDL_HWACCEL);
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196 if (accelerated) {
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197 src->map->hw_blit = HWAccelBlit;
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198 }
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199 return (accelerated);
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200 }
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201
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202 void
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203 FB_3DfxAccel(_THIS, __u32 card)
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204 {
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205 /* We have hardware accelerated surface functions */
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206 this->CheckHWBlit = CheckHWBlit;
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207 wait_vbl = WaitVBL;
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208 wait_idle = WaitIdle;
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209
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210 /* Reset the 3Dfx controller */
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211 tdfx_out32(BRESERROR0, 0);
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212 tdfx_out32(BRESERROR1, 0);
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213
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214 /* The 3Dfx has an accelerated color fill */
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215 this->info.blit_fill = 1;
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216 this->FillHWRect = FillHWRect;
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217
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218 /* The 3Dfx has accelerated normal and colorkey blits */
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219 this->info.blit_hw = 1;
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220 this->info.blit_hw_CC = 1;
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221 this->SetHWColorKey = SetHWColorKey;
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222 }
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223
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224 /* vi: set ts=4 sw=4 expandtab: */