/************************************************************************** * * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * **************************************************************************/ #include "pipe/p_compiler.h" #include "spu_main.h" #include "spu_texture.h" #include "spu_tile.h" #include "spu_colorpack.h" /** * Number of texture tiles to cache. * Note that this will probably be the largest consumer of SPU local store/ * memory for this driver! */ #define CACHE_SIZE 16 static tile_t tex_tiles[CACHE_SIZE] ALIGN16_ATTRIB; static vector unsigned int tex_tile_xy[CACHE_SIZE]; /** * Mark all tex cache entries as invalid. */ void invalidate_tex_cache(void) { /* XXX memset? */ uint i; for (i = 0; i < CACHE_SIZE; i++) { tex_tile_xy[i] = ((vector unsigned int) { ~0U, ~0U, ~0U, ~0U }); } } /** * Return the cache pos/index which corresponds to tile (tx,ty) */ static INLINE uint cache_pos(vector unsigned int txty) { uint pos = (spu_extract(txty,0) + spu_extract(txty,1) * 4) % CACHE_SIZE; return pos; } /** * Make sure the tile for texel (i,j) is present, return its position/index * in the cache. */ static uint get_tex_tile(vector unsigned int ij) { /* tile address: tx,ty */ const vector unsigned int txty = spu_rlmask(ij, -5); /* divide by 32 */ const uint pos = cache_pos(txty); if ((spu_extract(tex_tile_xy[pos], 0) != spu_extract(txty, 0)) || (spu_extract(tex_tile_xy[pos], 1) != spu_extract(txty, 1))) { /* texture cache miss, fetch tile from main memory */ const uint tiles_per_row = spu.texture.width / TILE_SIZE; const uint bytes_per_tile = sizeof(tile_t); const void *src = (const ubyte *) spu.texture.start + (spu_extract(txty,1) * tiles_per_row + spu_extract(txty,0)) * bytes_per_tile; printf("SPU %u: tex cache miss at %d, %d pos=%u old=%d,%d\n", spu.init.id, spu_extract(txty,0), spu_extract(txty,1), pos, spu_extract(tex_tile_xy[pos],0), spu_extract(tex_tile_xy[pos],1)); ASSERT_ALIGN16(tex_tiles[pos].ui); ASSERT_ALIGN16(src); mfc_get(tex_tiles[pos].ui, /* dest */ (unsigned int) src, bytes_per_tile, /* size */ TAG_TEXTURE_TILE, 0, /* tid */ 0 /* rid */); wait_on_mask(1 << TAG_TEXTURE_TILE); tex_tile_xy[pos] = txty; } else { #if 0 printf("SPU %u: tex cache HIT at %d, %d\n", spu.init.id, tx, ty); #endif } return pos; } /** * Get texture sample at texcoord. * XXX this is extremely primitive for now. */ vector float sample_texture_nearest(vector float texcoord) { vector float tc = spu_mul(texcoord, spu.tex_size); vector unsigned int itc = spu_convtu(tc, 0); /* convert to int */ itc = spu_and(itc, spu.tex_size_mask); /* mask (GL_REPEAT) */ vector unsigned int ij = spu_and(itc, TILE_SIZE-1); /* intra tile addr */ uint pos = get_tex_tile(itc); uint texel = tex_tiles[pos].ui[spu_extract(ij, 1)][spu_extract(ij, 0)]; return spu_unpack_A8R8G8B8(texel); } vector float sample_texture_bilinear(vector float texcoord) { static const vector unsigned int offset10 = {1, 0, 0, 0}; static const vector unsigned int offset01 = {0, 1, 0, 0}; vector float tc = spu_mul(texcoord, spu.tex_size); tc = spu_add(tc, spu_splats(-0.5f)); /* half texel bias */ /* integer texcoords S,T: */ vector unsigned int itc00 = spu_convtu(tc, 0); /* convert to int */ vector unsigned int itc01 = spu_add(itc00, offset01); vector unsigned int itc10 = spu_add(itc00, offset10); vector unsigned int itc11 = spu_add(itc10, offset01); /* mask (GL_REPEAT) */ itc00 = spu_and(itc00, spu.tex_size_mask); itc01 = spu_and(itc01, spu.tex_size_mask); itc10 = spu_and(itc10, spu.tex_size_mask); itc11 = spu_and(itc11, spu.tex_size_mask); /* intra tile addr */ vector unsigned int ij00 = spu_and(itc00, TILE_SIZE-1); vector unsigned int ij01 = spu_and(itc01, TILE_SIZE-1); vector unsigned int ij10 = spu_and(itc10, TILE_SIZE-1); vector unsigned int ij11 = spu_and(itc11, TILE_SIZE-1); /* get tile cache positions */ uint pos00 = get_tex_tile(itc00); uint pos01, pos10, pos11; if ((spu_extract(ij00, 0) < TILE_SIZE-1) && (spu_extract(ij00, 1) < TILE_SIZE-1)) { /* all texels are in the same tile */ pos01 = pos10 = pos11 = pos00; } else { pos01 = get_tex_tile(itc01); pos10 = get_tex_tile(itc10); pos11 = get_tex_tile(itc11); } /* get texels from tiles and convert to float[4] */ vector float texel00 = spu_unpack_A8R8G8B8(tex_tiles[pos00].ui[spu_extract(ij00, 1)][spu_extract(ij00, 0)]); vector float texel01 = spu_unpack_A8R8G8B8(tex_tiles[pos01].ui[spu_extract(ij01, 1)][spu_extract(ij01, 0)]); vector float texel10 = spu_unpack_A8R8G8B8(tex_tiles[pos10].ui[spu_extract(ij10, 1)][spu_extract(ij10, 0)]); vector float texel11 = spu_unpack_A8R8G8B8(tex_tiles[pos11].ui[spu_extract(ij11, 1)][spu_extract(ij11, 0)]); /* Compute weighting factors in [0,1] * Multiply texcoord by 1024, AND with 1023, convert back to float. */ vector float tc1024 = spu_mul(tc, spu_splats(1024.0f)); vector signed int itc1024 = spu_convts(tc1024, 0); itc1024 = spu_and(itc1024, spu_splats((1 << 10) - 1)); vector float weight = spu_convtf(itc1024, 10); /* smeared frac and 1-frac */ vector float sfrac = spu_splats(spu_extract(weight, 0)); vector float tfrac = spu_splats(spu_extract(weight, 1)); vector float sfrac1 = spu_sub(spu_splats(1.0f), sfrac); vector float tfrac1 = spu_sub(spu_splats(1.0f), tfrac); /* multiply the samples (colors) by the S/T weights */ texel00 = spu_mul(spu_mul(texel00, sfrac1), tfrac1); texel10 = spu_mul(spu_mul(texel10, sfrac ), tfrac1); texel01 = spu_mul(spu_mul(texel01, sfrac1), tfrac ); texel11 = spu_mul(spu_mul(texel11, sfrac ), tfrac ); /* compute sum of weighted samples */ vector float texel_sum = spu_add(texel00, texel01); texel_sum = spu_add(texel_sum, texel10); texel_sum = spu_add(texel_sum, texel11); return texel_sum; }