1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2012 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 (at) 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 */ 31 static 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 } 41 static void WaitIdle(_THIS) 42 { 43 tdfx_waitidle(); 44 } 45 46 /* Sets video mem colorkey and accelerated blit function */ 47 static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key) 48 { 49 return(0); 50 } 51 52 static 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 93 static 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 src_base; 100 Uint32 dst_base; 101 int srcX, srcY; 102 int dstX, dstY; 103 Uint32 blitop; 104 Uint32 use_colorkey; 105 106 /* Don't blit to the display surface when switched away */ 107 if ( switched_away ) { 108 return -2; /* no hardware access */ 109 } 110 if ( dst == this->screen ) { 111 SDL_mutexP(hw_lock); 112 } 113 114 /* Set the source and destination pixel format */ 115 src_base = ((char *)src->pixels - mapped_mem); 116 bpp = src->format->BitsPerPixel; 117 src_format = src->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13); 118 dst_base = ((char *)dst->pixels - mapped_mem); 119 bpp = dst->format->BitsPerPixel; 120 121 srcX = srcrect->x; 122 srcY = srcrect->y; 123 dstX = dstrect->x; 124 dstY = dstrect->y; 125 126 /* Assemble the blit operation */ 127 blitop = COMMAND_2D_BITBLT | (0xCC << 24); 128 if ( srcX <= dstX ) { 129 blitop |= BIT(14); 130 srcX += (dstrect->w - 1); 131 dstX += (dstrect->w - 1); 132 } 133 if ( srcY <= dstY ) { 134 blitop |= BIT(15); 135 srcY += (dstrect->h - 1); 136 dstY += (dstrect->h - 1); 137 } 138 139 /* Perform the blit! */ 140 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { 141 tdfx_wait(3); 142 tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey); 143 tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey); 144 tdfx_out32(ROP_2D, 0xAA00); 145 use_colorkey = 1; 146 } else { 147 use_colorkey = 0; 148 } 149 tdfx_wait(9); 150 tdfx_out32(SRCBASE, (Uint32)src_base); 151 tdfx_out32(SRCFORMAT, src_format); 152 tdfx_out32(DSTBASE, (Uint32)dst_base); 153 tdfx_out32(DSTFORMAT, src_format); 154 tdfx_out32(COMMAND_2D, blitop); 155 tdfx_out32(COMMANDEXTRA_2D, use_colorkey); 156 tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16)); 157 tdfx_out32(DSTXY, dstX | (dstY << 16)); 158 tdfx_out32(LAUNCH_2D, srcX | (srcY << 16)); 159 160 FB_AddBusySurface(src); 161 FB_AddBusySurface(dst); 162 163 if ( dst == this->screen ) { 164 SDL_mutexV(hw_lock); 165 } 166 return(0); 167 } 168 169 static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst) 170 { 171 int accelerated; 172 173 /* Set initial acceleration on */ 174 src->flags |= SDL_HWACCEL; 175 176 /* Set the surface attributes */ 177 if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { 178 if ( ! this->info.blit_hw_A ) { 179 src->flags &= ~SDL_HWACCEL; 180 } 181 } 182 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { 183 if ( ! this->info.blit_hw_CC ) { 184 src->flags &= ~SDL_HWACCEL; 185 } 186 } 187 188 /* Check to see if final surface blit is accelerated */ 189 accelerated = !!(src->flags & SDL_HWACCEL); 190 if ( accelerated ) { 191 src->map->hw_blit = HWAccelBlit; 192 } 193 return(accelerated); 194 } 195 196 void FB_3DfxAccel(_THIS, __u32 card) 197 { 198 /* We have hardware accelerated surface functions */ 199 this->CheckHWBlit = CheckHWBlit; 200 wait_vbl = WaitVBL; 201 wait_idle = WaitIdle; 202 203 /* Reset the 3Dfx controller */ 204 tdfx_out32(BRESERROR0, 0); 205 tdfx_out32(BRESERROR1, 0); 206 207 /* The 3Dfx has an accelerated color fill */ 208 this->info.blit_fill = 1; 209 this->FillHWRect = FillHWRect; 210 211 /* The 3Dfx has accelerated normal and colorkey blits */ 212 this->info.blit_hw = 1; 213 this->info.blit_hw_CC = 1; 214 this->SetHWColorKey = SetHWColorKey; 215 } 216
