32bpp_ssse3.cpp

Go to the documentation of this file.
00001 /* $Id: 32bpp_ssse3.cpp 26222 2014-01-03 18:03:14Z 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 #ifdef WITH_SSE
00013 
00014 #include "../stdafx.h"
00015 #include "../zoom_func.h"
00016 #include "../settings_type.h"
00017 #include "32bpp_ssse3.hpp"
00018 
00020 static FBlitter_32bppSSSE3 iFBlitter_32bppSSSE3;
00021 
00022 #if defined(__GNUC__)
00023   #pragma GCC diagnostic push
00024   #pragma GCC diagnostic ignored "-Wunused-variable"
00025 #endif
00026 
00033 template <BlitterMode mode, Blitter_32bppSSE2::ReadMode read_mode, Blitter_32bppSSE2::BlockType bt_last>
00034 inline void Blitter_32bppSSSE3::Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom)
00035 {
00036   const byte * const remap = bp->remap;
00037   Colour *dst_line = (Colour *) bp->dst + bp->top * bp->pitch + bp->left;
00038   int effective_width = bp->width;
00039 
00040   /* Find where to start reading in the source sprite */
00041   const SpriteData * const sd = (const SpriteData *) bp->sprite;
00042   const SpriteInfo * const si = &sd->infos[zoom];
00043   const MapValue *src_mv_line = (const MapValue *) &sd->data[si->mv_offset] + bp->skip_top * si->sprite_width;
00044   const Colour *src_rgba_line = (const Colour *) ((const byte *) &sd->data[si->sprite_offset] + bp->skip_top * si->sprite_line_size);
00045 
00046   if (read_mode != RM_WITH_MARGIN) {
00047     src_rgba_line += bp->skip_left;
00048     src_mv_line += bp->skip_left;
00049   }
00050 
00051   /* Load these variables into register before loop. */
00052   const __m128i a_cm        = ALPHA_CONTROL_MASK;
00053   const __m128i pack_hi_cm  = PACK_HIGH_CONTROL_MASK;
00054   const __m128i briAB_cm    = BRIGHTNESS_LOW_CONTROL_MASK;
00055   const __m128i div_cleaner = BRIGHTNESS_DIV_CLEANER;
00056   const __m128i ob_check    = OVERBRIGHT_PRESENCE_MASK;
00057   const __m128i ob_mask     = OVERBRIGHT_VALUE_MASK;
00058   const __m128i ob_cm       = OVERBRIGHT_CONTROL_MASK;
00059   const __m128i tr_nom_base = TRANSPARENT_NOM_BASE;
00060 
00061   for (int y = bp->height; y != 0; y--) {
00062     Colour *dst = dst_line;
00063     const Colour *src = src_rgba_line + META_LENGTH;
00064     const MapValue *src_mv = src_mv_line;
00065 
00066     switch (mode) {
00067       default: {
00068         switch (read_mode) {
00069           case RM_WITH_MARGIN: {
00070             src += src_rgba_line[0].data;
00071             dst += src_rgba_line[0].data;
00072             const int width_diff = si->sprite_width - bp->width;
00073             effective_width = bp->width - (int) src_rgba_line[0].data;
00074             const int delta_diff = (int) src_rgba_line[1].data - width_diff;
00075             const int new_width = effective_width - (delta_diff & ~1);
00076             effective_width = delta_diff > 0 ? new_width : effective_width;
00077             if (effective_width <= 0) break;
00078             /* FALLTHROUGH */
00079           }
00080 
00081           case RM_WITH_SKIP: {
00082             __m128i srcABCD = _mm_loadu_si128((const __m128i*) src);
00083             __m128i dstABCD = _mm_loadu_si128((__m128i*) dst);
00084             for (uint x = (uint) effective_width / 2; x > 0; x--) {
00085               ALPHA_BLEND_2(pack_hi_cm);
00086               /* With high repack, srcABCD have its 2 blended pixels like: [S0 S1 S2 S3] -> [-- -- BS0 BS1]
00087                * dstABCD shuffled: [D0 D1 D2 D3] -> [D2 D3 D0 D0]
00088                * PALIGNR takes what's in (): [-- -- (BS0 BS1] [D2 D3) D0 D0]
00089                */
00090               dstABCD = _mm_shuffle_epi32(dstABCD, 0x0E);
00091               srcABCD = _mm_alignr_epi8(dstABCD, srcABCD, 8);
00092               Colour *old_dst = dst;
00093               src += 2;
00094               dst += 2;
00095               /* It is VERY important to read next data before it gets invalidated in cpu cache. */
00096               dstABCD = _mm_loadu_si128((__m128i*) dst);
00097               _mm_storeu_si128((__m128i *) old_dst, srcABCD);
00098               srcABCD = _mm_loadu_si128((const __m128i*) src);
00099             }
00100             if (bt_last == BT_ODD) {
00101               ALPHA_BLEND_2(pack_hi_cm);
00102               (*dst).data = EXTR32(srcABCD, 2);
00103             }
00104             break;
00105           }
00106 
00107           default: NOT_REACHED();
00108         }
00109         break;
00110       }
00111       case BM_COLOUR_REMAP: {
00112         switch (read_mode) {
00113           case RM_WITH_MARGIN: {
00114             src += src_rgba_line[0].data;
00115             src_mv += src_rgba_line[0].data;
00116             dst += src_rgba_line[0].data;
00117             const int width_diff = si->sprite_width - bp->width;
00118             effective_width = bp->width - (int) src_rgba_line[0].data;
00119             const int delta_diff = (int) src_rgba_line[1].data - width_diff;
00120             const int nd = effective_width - delta_diff;
00121             effective_width = delta_diff > 0 ? nd : effective_width;
00122             if (effective_width <= 0) break;
00123             /* FALLTHROUGH */
00124           }
00125 
00126           case RM_WITH_SKIP: {
00127             __m128i srcABCD = _mm_loadu_si128((const __m128i*) src);
00128             __m128i dstABCD = _mm_loadu_si128((__m128i*) dst);
00129             uint32 mvX2 = *((uint32 *) const_cast<MapValue *>(src_mv));
00130 
00131             for (uint x = (uint) effective_width / 2; x > 0; x--) {
00132               /* Remap colours. */
00133               if (mvX2 & 0x00FF00FF) {
00134                 /* Written so the compiler uses CMOV. */
00135                 const Colour src0 = src[0];
00136                 const uint m0 = (byte) mvX2;
00137                 const uint r0 = remap[m0];
00138                 const Colour c0map = (this->LookupColourInPalette(r0).data & 0x00FFFFFF) | (src0.data & 0xFF000000);
00139                 Colour c0 = 0; // Use alpha of 0 to keep dst as is.
00140                 c0 = r0 == 0 ? c0 : c0map;
00141                 c0 = m0 != 0 ? c0 : src0;
00142                 INSR32(c0.data, srcABCD, 0);
00143 
00144                 const Colour src1 = src[1];
00145                 const uint m1 = (byte) (mvX2 >> 16);
00146                 const uint r1 = remap[m1];
00147                 const Colour c1map = (this->LookupColourInPalette(r1).data & 0x00FFFFFF) | (src1.data & 0xFF000000);
00148                 Colour c1 = 0;
00149                 c1 = r1 == 0 ? c1 : c1map;
00150                 c1 = m1 != 0 ? c1 : src1;
00151                 INSR32(c1.data, srcABCD, 1);
00152 
00153                 if ((mvX2 & 0xFF00FF00) != 0x80008000) {
00154                   ADJUST_BRIGHTNESS_2(srcABCD, mvX2);
00155                 }
00156               }
00157 
00158               /* Blend colours. */
00159               ALPHA_BLEND_2(pack_hi_cm);
00160               dstABCD = _mm_shuffle_epi32(dstABCD, 0x0E);
00161               srcABCD = _mm_alignr_epi8(dstABCD, srcABCD, 8);
00162               Colour *old_dst = dst;
00163               dst += 2;
00164               src += 2;
00165               src_mv += 2;
00166               dstABCD = _mm_loadu_si128((__m128i*) dst);
00167               _mm_storeu_si128((__m128i *) old_dst, srcABCD);
00168               mvX2 = *((uint32 *) const_cast<MapValue *>(src_mv));
00169               srcABCD = _mm_loadu_si128((const __m128i*) src);
00170             }
00171 
00172             if (effective_width & 1) {
00173               /* In case the m-channel is zero, do not remap this pixel in any way */
00174               if (src_mv->m == 0) {
00175                 if (src->a < 255) {
00176                   ALPHA_BLEND_2(pack_hi_cm);
00177                   (*dst).data = EXTR32(srcABCD, 2);
00178                 } else {
00179                   *dst = src->data;
00180                 }
00181               } else {
00182                 const uint r = remap[src_mv->m];
00183                 if (r != 0) {
00184                   Colour remapped_colour = AdjustBrightness(this->LookupColourInPalette(r), src_mv->v);
00185                   if (src->a < 255) {
00186                     remapped_colour.a = src->a;
00187                     INSR32(remapped_colour.data, srcABCD, 0);
00188                     ALPHA_BLEND_2(pack_hi_cm);
00189                     (*dst).data = EXTR32(srcABCD, 2);
00190                   } else
00191                     *dst = remapped_colour;
00192                 }
00193               }
00194             }
00195             break;
00196           }
00197 
00198           default: NOT_REACHED();
00199         }
00200         src_mv_line += si->sprite_width;
00201         break;
00202       }
00203       case BM_TRANSPARENT: {
00204         /* Make the current colour a bit more black, so it looks like this image is transparent.
00205          * rgb = rgb * ((256/4) * 4 - (alpha/4)) / ((256/4) * 4)
00206          */
00207         __m128i srcABCD = _mm_loadu_si128((const __m128i*) src);
00208         __m128i dstABCD = _mm_loadu_si128((__m128i*) dst);
00209         for (uint x = (uint) bp->width / 2; x > 0; x--) {
00210           __m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128());
00211           __m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128());
00212           __m128i dstCD = _mm_unpackhi_epi8(dstABCD, _mm_setzero_si128());
00213           __m128i alphaAB = _mm_shuffle_epi8(srcAB, a_cm);
00214           alphaAB = _mm_srli_epi16(alphaAB, 2); // Reduce to 64 levels of shades so the max value fits in 16 bits.
00215           __m128i nom = _mm_sub_epi16(tr_nom_base, alphaAB);
00216           dstAB = _mm_mullo_epi16(dstAB, nom);
00217           dstAB = _mm_srli_epi16(dstAB, 8);
00218           dstAB = _mm_packus_epi16(dstAB, dstCD);
00219           Colour *old_dst = dst;
00220           src += 2;
00221           dst += 2;
00222           dstABCD = _mm_loadu_si128((__m128i*) dst);
00223           _mm_storeu_si128((__m128i *) old_dst, dstAB);
00224           srcABCD = _mm_loadu_si128((const __m128i*) src);
00225         }
00226         if (bp->width & 1) {
00227           __m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128());
00228           __m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128());
00229           __m128i alphaAB = _mm_shuffle_epi8(srcAB, a_cm);
00230           alphaAB = _mm_srli_epi16(alphaAB, 2);
00231           __m128i nom = _mm_sub_epi16(tr_nom_base, alphaAB);
00232           dstAB = _mm_mullo_epi16(dstAB, nom);
00233           dstAB = _mm_srli_epi16(dstAB, 8);
00234           dstAB = _mm_packus_epi16(dstAB, dstAB);
00235           (*dst).data = EXTR32(dstAB, 0);
00236         }
00237         break;
00238       }
00239     }
00240 
00241     src_rgba_line = (const Colour*) ((const byte*) src_rgba_line + si->sprite_line_size);
00242     dst_line += bp->pitch;
00243   }
00244 }
00245 #if defined(__GNUC__)
00246   #pragma GCC diagnostic pop
00247 #endif
00248 
00256 void Blitter_32bppSSSE3::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
00257 {
00258   switch (mode) {
00259     case BM_NORMAL: {
00260       const BlockType bt_last = (BlockType) (bp->width & 1);
00261       if (bp->skip_left != 0 || bp->width <= MARGIN_NORMAL_THRESHOLD) {
00262         switch (bt_last) {
00263           case BT_EVEN: Draw<BM_NORMAL, RM_WITH_SKIP, BT_EVEN>(bp, zoom); return;
00264           case BT_ODD:  Draw<BM_NORMAL, RM_WITH_SKIP, BT_ODD>(bp, zoom); return;
00265           default: NOT_REACHED();
00266         }
00267       } else {
00268         switch (bt_last) {
00269           case BT_EVEN: Draw<BM_NORMAL, RM_WITH_MARGIN, BT_EVEN>(bp, zoom); return;
00270           case BT_ODD:  Draw<BM_NORMAL, RM_WITH_MARGIN, BT_ODD>(bp, zoom); return;
00271           default: NOT_REACHED();
00272         }
00273       }
00274       break;
00275     }
00276     case BM_COLOUR_REMAP:
00277       if (bp->skip_left != 0 || bp->width <= MARGIN_REMAP_THRESHOLD) {
00278         Draw<BM_COLOUR_REMAP, RM_WITH_SKIP, BT_NONE>(bp, zoom); return;
00279       } else {
00280         Draw<BM_COLOUR_REMAP, RM_WITH_MARGIN, BT_NONE>(bp, zoom); return;
00281       }
00282     case BM_TRANSPARENT:  Draw<BM_TRANSPARENT, RM_NONE, BT_NONE>(bp, zoom); return;
00283     default: NOT_REACHED();
00284   }
00285 }
00286 
00287 #endif /* WITH_SSE */