32bpp_anim.cpp

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00001 /* $Id: 32bpp_anim.cpp 18809 2010-01-15 16:41:15Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "../stdafx.h"
00013 #include "../core/math_func.hpp"
00014 #include "../video/video_driver.hpp"
00015 #include "32bpp_anim.hpp"
00016 
00017 #include "../table/sprites.h"
00018 
00019 static FBlitter_32bppAnim iFBlitter_32bppAnim;
00020 
00021 template <BlitterMode mode>
00022 inline void Blitter_32bppAnim::Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom)
00023 {
00024   const SpriteData *src = (const SpriteData *)bp->sprite;
00025 
00026   const Colour *src_px = (const Colour *)(src->data + src->offset[zoom][0]);
00027   const uint8  *src_n  = (const uint8  *)(src->data + src->offset[zoom][1]);
00028 
00029   for (uint i = bp->skip_top; i != 0; i--) {
00030     src_px = (const Colour *)((const byte *)src_px + *(const uint32 *)src_px);
00031     src_n += *(const uint32 *)src_n;
00032   }
00033 
00034   uint32 *dst = (uint32 *)bp->dst + bp->top * bp->pitch + bp->left;
00035   uint8 *anim = this->anim_buf + ((uint32 *)bp->dst - (uint32 *)_screen.dst_ptr) + bp->top * this->anim_buf_width + bp->left;
00036 
00037   const byte *remap = bp->remap; // store so we don't have to access it via bp everytime
00038 
00039   for (int y = 0; y < bp->height; y++) {
00040     uint32 *dst_ln = dst + bp->pitch;
00041     uint8 *anim_ln = anim + this->anim_buf_width;
00042 
00043     const Colour *src_px_ln = (const Colour *)((const byte *)src_px + *(const uint32 *)src_px);
00044     src_px++;
00045 
00046     const uint8 *src_n_ln = src_n + *(uint32 *)src_n;
00047     src_n += 4;
00048 
00049     uint32 *dst_end = dst + bp->skip_left;
00050 
00051     uint n;
00052 
00053     while (dst < dst_end) {
00054       n = *src_n++;
00055 
00056       if (src_px->a == 0) {
00057         dst += n;
00058         src_px ++;
00059         src_n++;
00060 
00061         if (dst > dst_end) anim += dst - dst_end;
00062       } else {
00063         if (dst + n > dst_end) {
00064           uint d = dst_end - dst;
00065           src_px += d;
00066           src_n += d;
00067 
00068           dst = dst_end - bp->skip_left;
00069           dst_end = dst + bp->width;
00070 
00071           n = min<uint>(n - d, (uint)bp->width);
00072           goto draw;
00073         }
00074         dst += n;
00075         src_px += n;
00076         src_n += n;
00077       }
00078     }
00079 
00080     dst -= bp->skip_left;
00081     dst_end -= bp->skip_left;
00082 
00083     dst_end += bp->width;
00084 
00085     while (dst < dst_end) {
00086       n = min<uint>(*src_n++, (uint)(dst_end - dst));
00087 
00088       if (src_px->a == 0) {
00089         anim += n;
00090         dst += n;
00091         src_px++;
00092         src_n++;
00093         continue;
00094       }
00095 
00096       draw:;
00097 
00098       switch (mode) {
00099         case BM_COLOUR_REMAP:
00100           if (src_px->a == 255) {
00101             do {
00102               uint m = *src_n;
00103               /* In case the m-channel is zero, do not remap this pixel in any way */
00104               if (m == 0) {
00105                 *dst = src_px->data;
00106                 *anim = 0;
00107               } else {
00108                 uint r = remap[m];
00109                 *anim = r;
00110                 if (r != 0) *dst = this->LookupColourInPalette(r);
00111               }
00112               anim++;
00113               dst++;
00114               src_px++;
00115               src_n++;
00116             } while (--n != 0);
00117           } else {
00118             do {
00119               uint m = *src_n;
00120               if (m == 0) {
00121                 *dst = ComposeColourRGBANoCheck(src_px->r, src_px->g, src_px->b, src_px->a, *dst);
00122                 *anim = 0;
00123               } else {
00124                 uint r = remap[m];
00125                 *anim = r;
00126                 if (r != 0) *dst = ComposeColourPANoCheck(this->LookupColourInPalette(r), src_px->a, *dst);
00127               }
00128               anim++;
00129               dst++;
00130               src_px++;
00131               src_n++;
00132             } while (--n != 0);
00133           }
00134           break;
00135 
00136         case BM_TRANSPARENT:
00137           /* TODO -- We make an assumption here that the remap in fact is transparency, not some colour.
00138            *  This is never a problem with the code we produce, but newgrfs can make it fail... or at least:
00139            *  we produce a result the newgrf maker didn't expect ;) */
00140 
00141           /* Make the current colour a bit more black, so it looks like this image is transparent */
00142           src_n += n;
00143           if (src_px->a == 255) {
00144             src_px += n;
00145             do {
00146               *dst = MakeTransparent(*dst, 3, 4);
00147               *anim = remap[*anim];
00148               anim++;
00149               dst++;
00150             } while (--n != 0);
00151           } else {
00152             do {
00153               *dst = MakeTransparent(*dst, (256 * 4 - src_px->a), 256 * 4);
00154               *anim = remap[*anim];
00155               anim++;
00156               dst++;
00157               src_px++;
00158             } while (--n != 0);
00159           }
00160           break;
00161 
00162         default:
00163           if (src_px->a == 255) {
00164             do {
00165               /* Compiler assumes pointer aliasing, can't optimise this on its own */
00166               uint m = *src_n++;
00167               /* Above 217 (PALETTE_ANIM_SIZE_START) is palette animation */
00168               *anim++ = m;
00169               *dst++ = (m >= PALETTE_ANIM_SIZE_START) ? this->LookupColourInPalette(m) : src_px->data;
00170               src_px++;
00171             } while (--n != 0);
00172           } else {
00173             do {
00174               uint m = *src_n++;
00175               *anim++ = m;
00176               if (m >= PALETTE_ANIM_SIZE_START) {
00177                 *dst = ComposeColourPANoCheck(this->LookupColourInPalette(m), src_px->a, *dst);
00178               } else {
00179                 *dst = ComposeColourRGBANoCheck(src_px->r, src_px->g, src_px->b, src_px->a, *dst);
00180               }
00181               dst++;
00182               src_px++;
00183             } while (--n != 0);
00184           }
00185           break;
00186       }
00187     }
00188 
00189     anim = anim_ln;
00190     dst = dst_ln;
00191     src_px = src_px_ln;
00192     src_n  = src_n_ln;
00193   }
00194 }
00195 
00196 void Blitter_32bppAnim::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
00197 {
00198   if (_screen_disable_anim) {
00199     /* This means our output is not to the screen, so we can't be doing any animation stuff, so use our parent Draw() */
00200     Blitter_32bppOptimized::Draw(bp, mode, zoom);
00201     return;
00202   }
00203 
00204   switch (mode) {
00205     default: NOT_REACHED();
00206     case BM_NORMAL:       Draw<BM_NORMAL>      (bp, zoom); return;
00207     case BM_COLOUR_REMAP: Draw<BM_COLOUR_REMAP>(bp, zoom); return;
00208     case BM_TRANSPARENT:  Draw<BM_TRANSPARENT> (bp, zoom); return;
00209   }
00210 }
00211 
00212 void Blitter_32bppAnim::DrawColourMappingRect(void *dst, int width, int height, int pal)
00213 {
00214   if (_screen_disable_anim) {
00215     /* This means our output is not to the screen, so we can't be doing any animation stuff, so use our parent DrawColourMappingRect() */
00216     Blitter_32bppOptimized::DrawColourMappingRect(dst, width, height, pal);
00217     return;
00218   }
00219 
00220   uint32 *udst = (uint32 *)dst;
00221   uint8 *anim;
00222 
00223   anim = this->anim_buf + ((uint32 *)dst - (uint32 *)_screen.dst_ptr);
00224 
00225   if (pal == PALETTE_TO_TRANSPARENT) {
00226     do {
00227       for (int i = 0; i != width; i++) {
00228         *udst = MakeTransparent(*udst, 154);
00229         *anim = 0;
00230         udst++;
00231         anim++;
00232       }
00233       udst = udst - width + _screen.pitch;
00234       anim = anim - width + this->anim_buf_width;
00235     } while (--height);
00236     return;
00237   }
00238   if (pal == PALETTE_TO_STRUCT_GREY) {
00239     do {
00240       for (int i = 0; i != width; i++) {
00241         *udst = MakeGrey(*udst);
00242         *anim = 0;
00243         udst++;
00244         anim++;
00245       }
00246       udst = udst - width + _screen.pitch;
00247       anim = anim - width + this->anim_buf_width;
00248     } while (--height);
00249     return;
00250   }
00251 
00252   DEBUG(misc, 0, "32bpp blitter doesn't know how to draw this colour table ('%d')", pal);
00253 }
00254 
00255 void Blitter_32bppAnim::SetPixel(void *video, int x, int y, uint8 colour)
00256 {
00257   *((uint32 *)video + x + y * _screen.pitch) = LookupColourInPalette(colour);
00258 
00259   /* Set the colour in the anim-buffer too, if we are rendering to the screen */
00260   if (_screen_disable_anim) return;
00261   this->anim_buf[((uint32 *)video - (uint32 *)_screen.dst_ptr) + x + y * this->anim_buf_width] = colour;
00262 }
00263 
00264 void Blitter_32bppAnim::SetPixelIfEmpty(void *video, int x, int y, uint8 colour)
00265 {
00266   uint32 *dst = (uint32 *)video + x + y * _screen.pitch;
00267   if (*dst == 0) {
00268     *dst = LookupColourInPalette(colour);
00269     /* Set the colour in the anim-buffer too, if we are rendering to the screen */
00270     if (_screen_disable_anim) return;
00271     this->anim_buf[((uint32 *)video - (uint32 *)_screen.dst_ptr) + x + y * this->anim_buf_width] = colour;
00272   }
00273 }
00274 
00275 void Blitter_32bppAnim::DrawRect(void *video, int width, int height, uint8 colour)
00276 {
00277   if (_screen_disable_anim) {
00278     /* This means our output is not to the screen, so we can't be doing any animation stuff, so use our parent DrawRect() */
00279     Blitter_32bppOptimized::DrawRect(video, width, height, colour);
00280     return;
00281   }
00282 
00283   uint32 colour32 = LookupColourInPalette(colour);
00284   uint8 *anim_line;
00285 
00286   anim_line = ((uint32 *)video - (uint32 *)_screen.dst_ptr) + this->anim_buf;
00287 
00288   do {
00289     uint32 *dst = (uint32 *)video;
00290     uint8 *anim = anim_line;
00291 
00292     for (int i = width; i > 0; i--) {
00293       *dst = colour32;
00294       /* Set the colour in the anim-buffer too */
00295       *anim = colour;
00296       dst++;
00297       anim++;
00298     }
00299     video = (uint32 *)video + _screen.pitch;
00300     anim_line += this->anim_buf_width;
00301   } while (--height);
00302 }
00303 
00304 void Blitter_32bppAnim::CopyFromBuffer(void *video, const void *src, int width, int height)
00305 {
00306   assert(!_screen_disable_anim);
00307   assert(video >= _screen.dst_ptr && video <= (uint32 *)_screen.dst_ptr + _screen.width + _screen.height * _screen.pitch);
00308   uint32 *dst = (uint32 *)video;
00309   uint32 *usrc = (uint32 *)src;
00310   uint8 *anim_line = ((uint32 *)video - (uint32 *)_screen.dst_ptr) + this->anim_buf;
00311 
00312   int count = (_use_palette == PAL_DOS) ? PALETTE_ANIM_SIZE_DOS : PALETTE_ANIM_SIZE_WIN;
00313 
00314   for (; height > 0; height--) {
00315     /* We need to keep those for palette animation. */
00316     uint32 *dst_pal = dst;
00317     uint8 *anim_pal = anim_line;
00318 
00319     memcpy(dst, usrc, width * sizeof(uint32));
00320     usrc += width;
00321     dst += _screen.pitch;
00322     /* Copy back the anim-buffer */
00323     memcpy(anim_line, usrc, width * sizeof(uint8));
00324     usrc = (uint32 *)((uint8 *)usrc + width);
00325     anim_line += this->anim_buf_width;
00326 
00327     /* Okay, it is *very* likely that the image we stored is using
00328      * the wrong palette animated colours. There are two things we
00329      * can do to fix this. The first is simply reviewing the whole
00330      * screen after we copied the buffer, i.e. run PaletteAnimate,
00331      * however that forces a full screen redraw which is expensive
00332      * for just the cursor. This just copies the implementation of
00333      * palette animation, much cheaper though slightly nastier. */
00334     for (int i = 0; i < width; i++) {
00335       uint colour = *anim_pal;
00336       if (IsInsideBS(colour, PALETTE_ANIM_SIZE_START, count)) {
00337         /* Update this pixel */
00338         *dst_pal = LookupColourInPalette(colour);
00339       }
00340       dst_pal++;
00341       anim_pal++;
00342     }
00343   }
00344 }
00345 
00346 void Blitter_32bppAnim::CopyToBuffer(const void *video, void *dst, int width, int height)
00347 {
00348   assert(!_screen_disable_anim);
00349   assert(video >= _screen.dst_ptr && video <= (uint32 *)_screen.dst_ptr + _screen.width + _screen.height * _screen.pitch);
00350   uint32 *udst = (uint32 *)dst;
00351   uint32 *src = (uint32 *)video;
00352   uint8 *anim_line;
00353 
00354   if (this->anim_buf == NULL) return;
00355 
00356   anim_line = ((uint32 *)video - (uint32 *)_screen.dst_ptr) + this->anim_buf;
00357 
00358   for (; height > 0; height--) {
00359     memcpy(udst, src, width * sizeof(uint32));
00360     src += _screen.pitch;
00361     udst += width;
00362     /* Copy the anim-buffer */
00363     memcpy(udst, anim_line, width * sizeof(uint8));
00364     udst = (uint32 *)((uint8 *)udst + width);
00365     anim_line += this->anim_buf_width;
00366   }
00367 }
00368 
00369 void Blitter_32bppAnim::ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y)
00370 {
00371   assert(!_screen_disable_anim);
00372   assert(video >= _screen.dst_ptr && video <= (uint32 *)_screen.dst_ptr + _screen.width + _screen.height * _screen.pitch);
00373   uint8 *dst, *src;
00374 
00375   /* We need to scroll the anim-buffer too */
00376   if (scroll_y > 0) {
00377     dst = this->anim_buf + left + (top + height - 1) * this->anim_buf_width;
00378     src = dst - scroll_y * this->anim_buf_width;
00379 
00380     /* Adjust left & width */
00381     if (scroll_x >= 0) {
00382       dst += scroll_x;
00383     } else {
00384       src -= scroll_x;
00385     }
00386 
00387     uint tw = width + (scroll_x >= 0 ? -scroll_x : scroll_x);
00388     uint th = height - scroll_y;
00389     for (; th > 0; th--) {
00390       memcpy(dst, src, tw * sizeof(uint8));
00391       src -= this->anim_buf_width;
00392       dst -= this->anim_buf_width;
00393     }
00394   } else {
00395     /* Calculate pointers */
00396     dst = this->anim_buf + left + top * this->anim_buf_width;
00397     src = dst - scroll_y * this->anim_buf_width;
00398 
00399     /* Adjust left & width */
00400     if (scroll_x >= 0) {
00401       dst += scroll_x;
00402     } else {
00403       src -= scroll_x;
00404     }
00405 
00406     /* the y-displacement may be 0 therefore we have to use memmove,
00407      * because source and destination may overlap */
00408     uint tw = width + (scroll_x >= 0 ? -scroll_x : scroll_x);
00409     uint th = height + scroll_y;
00410     for (; th > 0; th--) {
00411       memmove(dst, src, tw * sizeof(uint8));
00412       src += this->anim_buf_width;
00413       dst += this->anim_buf_width;
00414     }
00415   }
00416 
00417   Blitter_32bppBase::ScrollBuffer(video, left, top, width, height, scroll_x, scroll_y);
00418 }
00419 
00420 int Blitter_32bppAnim::BufferSize(int width, int height)
00421 {
00422   return width * height * (sizeof(uint32) + sizeof(uint8));
00423 }
00424 
00425 void Blitter_32bppAnim::PaletteAnimate(uint start, uint count)
00426 {
00427   assert(!_screen_disable_anim);
00428 
00429   /* Never repaint the transparency pixel */
00430   if (start == 0) {
00431     start++;
00432     count--;
00433   }
00434 
00435   const uint8 *anim = this->anim_buf;
00436   uint32 *dst = (uint32 *)_screen.dst_ptr;
00437 
00438   /* Let's walk the anim buffer and try to find the pixels */
00439   for (int y = this->anim_buf_height; y != 0 ; y--) {
00440     for (int x = this->anim_buf_width; x != 0 ; x--) {
00441       uint colour = *anim;
00442       if (IsInsideBS(colour, start, count)) {
00443         /* Update this pixel */
00444         *dst = LookupColourInPalette(colour);
00445       }
00446       dst++;
00447       anim++;
00448     }
00449     dst += _screen.pitch - this->anim_buf_width;
00450   }
00451 
00452   /* Make sure the backend redraws the whole screen */
00453   _video_driver->MakeDirty(0, 0, _screen.width, _screen.height);
00454 }
00455 
00456 Blitter::PaletteAnimation Blitter_32bppAnim::UsePaletteAnimation()
00457 {
00458   return Blitter::PALETTE_ANIMATION_BLITTER;
00459 }
00460 
00461 void Blitter_32bppAnim::PostResize()
00462 {
00463   if (_screen.width != this->anim_buf_width || _screen.height != this->anim_buf_height) {
00464     /* The size of the screen changed; we can assume we can wipe all data from our buffer */
00465     free(this->anim_buf);
00466     this->anim_buf = CallocT<uint8>(_screen.width * _screen.height);
00467     this->anim_buf_width = _screen.width;
00468     this->anim_buf_height = _screen.height;
00469   }
00470 }

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