src/video/fbcon/SDL_fb3dfx.c
author Edgar Simo <bobbens@gmail.com>
Sun, 06 Jul 2008 17:06:37 +0000
branchgsoc2008_force_feedback
changeset 2498 ab567bd667bf
parent 1895 c121d94672cb
child 2698 e1da92da346c
permissions -rw-r--r--
Fixed various mistakes in the doxygen.
     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 */
    31 static void
    32 WaitVBL(_THIS)
    33 {
    34     /* find start of retrace */
    35     tdfx_waitidle();
    36     while ((tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE);
    37     /* wait until we're past the start */
    38     while ((tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == 0);
    39 }
    40 static void
    41 WaitIdle(_THIS)
    42 {
    43     tdfx_waitidle();
    44 }
    45 
    46 /* Sets video mem colorkey and accelerated blit function */
    47 static int
    48 SetHWColorKey(_THIS, SDL_Surface * surface, Uint32 key)
    49 {
    50     return (0);
    51 }
    52 
    53 static int
    54 FillHWRect(_THIS, SDL_Surface * dst, SDL_Rect * rect, Uint32 color)
    55 {
    56     int bpp;
    57     char *dst_base;
    58     Uint32 format;
    59     int dstX, dstY;
    60 
    61     /* Don't blit to the display surface when switched away */
    62     if (switched_away) {
    63         return -2;              /* no hardware access */
    64     }
    65     if (dst == this->screen) {
    66         SDL_mutexP(hw_lock);
    67     }
    68 
    69     /* Set the destination pixel format */
    70     dst_base = (char *) ((char *) dst->pixels - mapped_mem);
    71     bpp = dst->format->BitsPerPixel;
    72     format = dst->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
    73 
    74     /* Calculate source and destination base coordinates */
    75     dstX = rect->x;
    76     dstY = rect->y;
    77 
    78     /* Execute the fill command */
    79     tdfx_wait(6);
    80     tdfx_out32(DSTBASE, (Uint32) dst_base);
    81     tdfx_out32(DSTFORMAT, format);
    82     tdfx_out32(COLORFORE, color);
    83     tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT);
    84     tdfx_out32(DSTSIZE, rect->w | (rect->h << 16));
    85     tdfx_out32(LAUNCH_2D, dstX | (dstY << 16));
    86 
    87     FB_AddBusySurface(dst);
    88 
    89     if (dst == this->screen) {
    90         SDL_mutexV(hw_lock);
    91     }
    92     return (0);
    93 }
    94 
    95 static int
    96 HWAccelBlit(SDL_Surface * src, SDL_Rect * srcrect,
    97             SDL_Surface * dst, SDL_Rect * dstrect)
    98 {
    99     SDL_VideoDevice *this = current_video;
   100     int bpp;
   101     Uint32 src_format;
   102     Uint32 dst_format;
   103     char *src_base;
   104     char *dst_base;
   105     int srcX, srcY;
   106     int dstX, dstY;
   107     Uint32 blitop;
   108     Uint32 use_colorkey;
   109 
   110     /* Don't blit to the display surface when switched away */
   111     if (switched_away) {
   112         return -2;              /* no hardware access */
   113     }
   114     if (dst == this->screen) {
   115         SDL_mutexP(hw_lock);
   116     }
   117 
   118     /* Set the source and destination pixel format */
   119     src_base = (char *) ((char *) src->pixels - mapped_mem);
   120     bpp = src->format->BitsPerPixel;
   121     src_format = src->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
   122     dst_base = (char *) ((char *) dst->pixels - mapped_mem);
   123     bpp = dst->format->BitsPerPixel;
   124     dst_format = dst->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
   125 
   126     srcX = srcrect->x;
   127     srcY = srcrect->y;
   128     dstX = dstrect->x;
   129     dstY = dstrect->y;
   130 
   131     /* Assemble the blit operation */
   132     blitop = COMMAND_2D_BITBLT | (0xCC << 24);
   133     if (srcX <= dstX) {
   134         blitop |= BIT(14);
   135         srcX += (dstrect->w - 1);
   136         dstX += (dstrect->w - 1);
   137     }
   138     if (srcY <= dstY) {
   139         blitop |= BIT(15);
   140         srcY += (dstrect->h - 1);
   141         dstY += (dstrect->h - 1);
   142     }
   143 
   144     /* Perform the blit! */
   145     if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
   146         tdfx_wait(3);
   147         tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey);
   148         tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey);
   149         tdfx_out32(ROP_2D, 0xAA00);
   150         use_colorkey = 1;
   151     } else {
   152         use_colorkey = 0;
   153     }
   154     tdfx_wait(9);
   155     tdfx_out32(SRCBASE, (Uint32) src_base);
   156     tdfx_out32(SRCFORMAT, src_format);
   157     tdfx_out32(DSTBASE, (Uint32) dst_base);
   158     tdfx_out32(DSTFORMAT, src_format);
   159     tdfx_out32(COMMAND_2D, blitop);
   160     tdfx_out32(COMMANDEXTRA_2D, use_colorkey);
   161     tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16));
   162     tdfx_out32(DSTXY, dstX | (dstY << 16));
   163     tdfx_out32(LAUNCH_2D, srcX | (srcY << 16));
   164 
   165     FB_AddBusySurface(src);
   166     FB_AddBusySurface(dst);
   167 
   168     if (dst == this->screen) {
   169         SDL_mutexV(hw_lock);
   170     }
   171     return (0);
   172 }
   173 
   174 static int
   175 CheckHWBlit(_THIS, SDL_Surface * src, SDL_Surface * dst)
   176 {
   177     int accelerated;
   178 
   179     /* Set initial acceleration on */
   180     src->flags |= SDL_HWACCEL;
   181 
   182     /* Set the surface attributes */
   183     if ((src->flags & SDL_SRCALPHA) == SDL_SRCALPHA) {
   184         if (!this->info.blit_hw_A) {
   185             src->flags &= ~SDL_HWACCEL;
   186         }
   187     }
   188     if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
   189         if (!this->info.blit_hw_CC) {
   190             src->flags &= ~SDL_HWACCEL;
   191         }
   192     }
   193 
   194     /* Check to see if final surface blit is accelerated */
   195     accelerated = !!(src->flags & SDL_HWACCEL);
   196     if (accelerated) {
   197         src->map->hw_blit = HWAccelBlit;
   198     }
   199     return (accelerated);
   200 }
   201 
   202 void
   203 FB_3DfxAccel(_THIS, __u32 card)
   204 {
   205     /* We have hardware accelerated surface functions */
   206     this->CheckHWBlit = CheckHWBlit;
   207     wait_vbl = WaitVBL;
   208     wait_idle = WaitIdle;
   209 
   210     /* Reset the 3Dfx controller */
   211     tdfx_out32(BRESERROR0, 0);
   212     tdfx_out32(BRESERROR1, 0);
   213 
   214     /* The 3Dfx has an accelerated color fill */
   215     this->info.blit_fill = 1;
   216     this->FillHWRect = FillHWRect;
   217 
   218     /* The 3Dfx has accelerated normal and colorkey blits */
   219     this->info.blit_hw = 1;
   220     this->info.blit_hw_CC = 1;
   221     this->SetHWColorKey = SetHWColorKey;
   222 }
   223 
   224 /* vi: set ts=4 sw=4 expandtab: */