1/* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2006 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with this library; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 19 Sam Lantinga 20 slouken@libsdl.org 21*/ 22#include "SDL_config.h" 23 24#include "SDL_video.h" 25#include "../SDL_blit.h" 26#include "SDL_fb3dfx.h" 27#include "3dfx_mmio.h" 28 29 30/* Wait for vertical retrace */ 31static void WaitVBL(_THIS) 32{ 33 /* find start of retrace */ 34 tdfx_waitidle(); 35 while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE ) 36 ; 37 /* wait until we're past the start */ 38 while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == 0 ) 39 ; 40} 41static void WaitIdle(_THIS) 42{ 43 tdfx_waitidle(); 44} 45 46/* Sets video mem colorkey and accelerated blit function */ 47static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key) 48{ 49 return(0); 50} 51 52static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color) 53{ 54 int bpp; 55 Uint32 dst_base; 56 Uint32 format; 57 int dstX, dstY; 58 59 /* Don't blit to the display surface when switched away */ 60 if ( switched_away ) { 61 return -2; /* no hardware access */ 62 } 63 if ( dst == this->screen ) { 64 SDL_mutexP(hw_lock); 65 } 66 67 /* Set the destination pixel format */ 68 dst_base = ((char *)dst->pixels - mapped_mem); 69 bpp = dst->format->BitsPerPixel; 70 format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13); 71 72 /* Calculate source and destination base coordinates */ 73 dstX = rect->x; 74 dstY = rect->y; 75 76 /* Execute the fill command */ 77 tdfx_wait(6); 78 tdfx_out32(DSTBASE, dst_base); 79 tdfx_out32(DSTFORMAT, format); 80 tdfx_out32(COLORFORE, color); 81 tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT); 82 tdfx_out32(DSTSIZE, rect->w | (rect->h << 16)); 83 tdfx_out32(LAUNCH_2D, dstX | (dstY << 16)); 84 85 FB_AddBusySurface(dst); 86 87 if ( dst == this->screen ) { 88 SDL_mutexV(hw_lock); 89 } 90 return(0); 91} 92 93static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect, 94 SDL_Surface *dst, SDL_Rect *dstrect) 95{ 96 SDL_VideoDevice *this = current_video; 97 int bpp; 98 Uint32 src_format; 99 Uint32 dst_format; 100 Uint32 src_base; 101 Uint32 dst_base; 102 int srcX, srcY; 103 int dstX, dstY; 104 Uint32 blitop; 105 Uint32 use_colorkey; 106 107 /* Don't blit to the display surface when switched away */ 108 if ( switched_away ) { 109 return -2; /* no hardware access */ 110 } 111 if ( dst == this->screen ) { 112 SDL_mutexP(hw_lock); 113 } 114 115 /* Set the source and destination pixel format */ 116 src_base = ((char *)src->pixels - mapped_mem); 117 bpp = src->format->BitsPerPixel; 118 src_format = src->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13); 119 dst_base = ((char *)dst->pixels - mapped_mem); 120 bpp = dst->format->BitsPerPixel; 121 dst_format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13); 122 123 srcX = srcrect->x; 124 srcY = srcrect->y; 125 dstX = dstrect->x; 126 dstY = dstrect->y; 127 128 /* Assemble the blit operation */ 129 blitop = COMMAND_2D_BITBLT | (0xCC << 24); 130 if ( srcX <= dstX ) { 131 blitop |= BIT(14); 132 srcX += (dstrect->w - 1); 133 dstX += (dstrect->w - 1); 134 } 135 if ( srcY <= dstY ) { 136 blitop |= BIT(15); 137 srcY += (dstrect->h - 1); 138 dstY += (dstrect->h - 1); 139 } 140 141 /* Perform the blit! */ 142 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { 143 tdfx_wait(3); 144 tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey); 145 tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey); 146 tdfx_out32(ROP_2D, 0xAA00); 147 use_colorkey = 1; 148 } else { 149 use_colorkey = 0; 150 } 151 tdfx_wait(9); 152 tdfx_out32(SRCBASE, (Uint32)src_base); 153 tdfx_out32(SRCFORMAT, src_format); 154 tdfx_out32(DSTBASE, (Uint32)dst_base); 155 tdfx_out32(DSTFORMAT, src_format); 156 tdfx_out32(COMMAND_2D, blitop); 157 tdfx_out32(COMMANDEXTRA_2D, use_colorkey); 158 tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16)); 159 tdfx_out32(DSTXY, dstX | (dstY << 16)); 160 tdfx_out32(LAUNCH_2D, srcX | (srcY << 16)); 161 162 FB_AddBusySurface(src); 163 FB_AddBusySurface(dst); 164 165 if ( dst == this->screen ) { 166 SDL_mutexV(hw_lock); 167 } 168 return(0); 169} 170 171static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst) 172{ 173 int accelerated; 174 175 /* Set initial acceleration on */ 176 src->flags |= SDL_HWACCEL; 177 178 /* Set the surface attributes */ 179 if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { 180 if ( ! this->info.blit_hw_A ) { 181 src->flags &= ~SDL_HWACCEL; 182 } 183 } 184 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { 185 if ( ! this->info.blit_hw_CC ) { 186 src->flags &= ~SDL_HWACCEL; 187 } 188 } 189 190 /* Check to see if final surface blit is accelerated */ 191 accelerated = !!(src->flags & SDL_HWACCEL); 192 if ( accelerated ) { 193 src->map->hw_blit = HWAccelBlit; 194 } 195 return(accelerated); 196} 197 198void FB_3DfxAccel(_THIS, __u32 card) 199{ 200 /* We have hardware accelerated surface functions */ 201 this->CheckHWBlit = CheckHWBlit; 202 wait_vbl = WaitVBL; 203 wait_idle = WaitIdle; 204 205 /* Reset the 3Dfx controller */ 206 tdfx_out32(BRESERROR0, 0); 207 tdfx_out32(BRESERROR1, 0); 208 209 /* The 3Dfx has an accelerated color fill */ 210 this->info.blit_fill = 1; 211 this->FillHWRect = FillHWRect; 212 213 /* The 3Dfx has accelerated normal and colorkey blits */ 214 this->info.blit_hw = 1; 215 this->info.blit_hw_CC = 1; 216 this->SetHWColorKey = SetHWColorKey; 217} 218