32bpp_anim.cpp

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

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