| /************************************************************************** |
| * |
| * Copyright 2010 VMware, Inc. 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 THE AUTHORS 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. |
| * |
| **************************************************************************/ |
| |
| |
| /* |
| * Template for generating Z test functions |
| * Only PIPE_FORMAT_Z16_UNORM supported at this time. |
| */ |
| |
| |
| #ifndef NAME |
| #error "NAME is not defined!" |
| #endif |
| |
| #if !defined(OPERATOR) && !defined(ALWAYS) |
| #error "neither OPERATOR nor ALWAYS is defined!" |
| #endif |
| |
| |
| /* |
| * NOTE: there's no guarantee that the quads are sequentially side by |
| * side. The fragment shader may have culled some quads, etc. Sliver |
| * triangles may generate non-sequential quads. |
| */ |
| static void |
| NAME(struct quad_stage *qs, |
| struct quad_header *quads[], |
| unsigned nr) |
| { |
| unsigned i, pass = 0; |
| const unsigned ix = quads[0]->input.x0; |
| const unsigned iy = quads[0]->input.y0; |
| const float fx = (float) ix; |
| const float fy = (float) iy; |
| const float dzdx = quads[0]->posCoef->dadx[2]; |
| const float dzdy = quads[0]->posCoef->dady[2]; |
| const float z0 = quads[0]->posCoef->a0[2] + dzdx * fx + dzdy * fy; |
| struct softpipe_cached_tile *tile; |
| ushort (*depth16)[TILE_SIZE]; |
| ushort init_idepth[4], idepth[4], depth_step; |
| const float scale = 65535.0; |
| |
| /* compute scaled depth of the four pixels in first quad */ |
| init_idepth[0] = (ushort)((z0) * scale); |
| init_idepth[1] = (ushort)((z0 + dzdx) * scale); |
| init_idepth[2] = (ushort)((z0 + dzdy) * scale); |
| init_idepth[3] = (ushort)((z0 + dzdx + dzdy) * scale); |
| |
| depth_step = (ushort)(dzdx * scale); |
| |
| tile = sp_get_cached_tile(qs->softpipe->zsbuf_cache, ix, iy, quads[0]->input.layer); |
| |
| for (i = 0; i < nr; i++) { |
| const unsigned outmask = quads[i]->inout.mask; |
| const int dx = quads[i]->input.x0 - ix; |
| unsigned mask = 0; |
| |
| /* compute depth for this quad */ |
| idepth[0] = init_idepth[0] + dx * depth_step; |
| idepth[1] = init_idepth[1] + dx * depth_step; |
| idepth[2] = init_idepth[2] + dx * depth_step; |
| idepth[3] = init_idepth[3] + dx * depth_step; |
| |
| depth16 = (ushort (*)[TILE_SIZE]) |
| &tile->data.depth16[iy % TILE_SIZE][(ix + dx)% TILE_SIZE]; |
| |
| #ifdef ALWAYS |
| if (outmask & 1) { |
| depth16[0][0] = idepth[0]; |
| mask |= (1 << 0); |
| } |
| |
| if (outmask & 2) { |
| depth16[0][1] = idepth[1]; |
| mask |= (1 << 1); |
| } |
| |
| if (outmask & 4) { |
| depth16[1][0] = idepth[2]; |
| mask |= (1 << 2); |
| } |
| |
| if (outmask & 8) { |
| depth16[1][1] = idepth[3]; |
| mask |= (1 << 3); |
| } |
| #else |
| /* Note: OPERATOR appears here: */ |
| if ((outmask & 1) && (idepth[0] OPERATOR depth16[0][0])) { |
| depth16[0][0] = idepth[0]; |
| mask |= (1 << 0); |
| } |
| |
| if ((outmask & 2) && (idepth[1] OPERATOR depth16[0][1])) { |
| depth16[0][1] = idepth[1]; |
| mask |= (1 << 1); |
| } |
| |
| if ((outmask & 4) && (idepth[2] OPERATOR depth16[1][0])) { |
| depth16[1][0] = idepth[2]; |
| mask |= (1 << 2); |
| } |
| |
| if ((outmask & 8) && (idepth[3] OPERATOR depth16[1][1])) { |
| depth16[1][1] = idepth[3]; |
| mask |= (1 << 3); |
| } |
| #endif |
| |
| depth16 = (ushort (*)[TILE_SIZE]) &depth16[0][2]; |
| |
| quads[i]->inout.mask = mask; |
| if (quads[i]->inout.mask) |
| quads[pass++] = quads[i]; |
| } |
| |
| if (pass) |
| qs->next->run(qs->next, quads, pass); |
| } |
| |
| |
| #undef NAME |
| #undef OPERATOR |
| #undef ALWAYS |