diff options
author | Chia-I Wu <olv@lunarg.com> | 2010-08-01 21:29:36 +0800 |
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committer | Chia-I Wu <olv@lunarg.com> | 2010-08-06 13:39:36 +0800 |
commit | 524b2626c2d018f330ae7423c858ef73ea0424b5 (patch) | |
tree | 5b57a18945d3ea01234ea2b42d15c52e44889d14 /src/gallium/auxiliary/draw/draw_decompose_tmp.h | |
parent | 0a2a6c75bffc56d8dfde9b8a46c40222825630ea (diff) |
draw: Add draw_decompose_tmp.h.
Including draw_decompose_tmp.h defines a primitive decomposer. It is
intended to replace the existing vcache/so/gs/pipe decomposers.
This is based on draw_pt_vcache_tmp.h.
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_decompose_tmp.h')
-rw-r--r-- | src/gallium/auxiliary/draw/draw_decompose_tmp.h | 425 |
1 files changed, 425 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_decompose_tmp.h b/src/gallium/auxiliary/draw/draw_decompose_tmp.h new file mode 100644 index 0000000000..cb25202323 --- /dev/null +++ b/src/gallium/auxiliary/draw/draw_decompose_tmp.h @@ -0,0 +1,425 @@ +/* + * Mesa 3-D graphics library + * Version: 7.9 + * + * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. + * Copyright (C) 2010 LunarG Inc. + * + * 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, sublicense, + * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS 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. + * + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + * Chia-I Wu <olv@lunarg.com> + */ + +/* these macros are optional */ +#ifndef LOCAL_VARS +#define LOCAL_VARS do {} while (0) +#endif +#ifndef FUNC_ENTER +#define FUNC_ENTER do {} while (0) +#endif +#ifndef FUNC_EXIT +#define FUNC_EXIT do {} while (0) +#endif +#ifndef LINE_ADJ +#define LINE_ADJ(flags, a0, i0, i1, a1) LINE(flags, i0, i1) +#endif +#ifndef TRIANGLE_ADJ +#define TRIANGLE_ADJ(flags, i0, a0, i1, a1, i2, a2) TRIANGLE(flags, i0, i1, i2) +#endif + +static void +FUNC(FUNC_VARS) +{ + unsigned idx[6], i; + ushort flags; + LOCAL_VARS; + + FUNC_ENTER; + + /* prim, count, and last_vertex_last should have been defined */ + if (0) { + debug_printf("%s: prim 0x%x, count %d, last_vertex_last %d\n", + __FUNCTION__, prim, count, last_vertex_last); + } + + switch (prim) { + case PIPE_PRIM_POINTS: + for (i = 0; i < count; i++) { + idx[0] = GET_ELT(i); + POINT(idx[0]); + } + break; + + case PIPE_PRIM_LINES: + flags = DRAW_PIPE_RESET_STIPPLE; + for (i = 0; i + 1 < count; i += 2) { + idx[0] = GET_ELT(i); + idx[1] = GET_ELT(i + 1); + LINE(flags, idx[0], idx[1]); + } + break; + + case PIPE_PRIM_LINE_LOOP: + case PIPE_PRIM_LINE_STRIP: + if (count >= 2) { + flags = DRAW_PIPE_RESET_STIPPLE; + idx[1] = GET_ELT(0); + idx[2] = idx[1]; + + for (i = 1; i < count; i++, flags = 0) { + idx[0] = idx[1]; + idx[1] = GET_ELT(i); + LINE(flags, idx[0], idx[1]); + } + /* close the loop */ + if (prim == PIPE_PRIM_LINE_LOOP) + LINE(flags, idx[1], idx[2]); + } + break; + + case PIPE_PRIM_TRIANGLES: + flags = DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL; + for (i = 0; i + 2 < count; i += 3) { + idx[0] = GET_ELT(i); + idx[1] = GET_ELT(i + 1); + idx[2] = GET_ELT(i + 2); + TRIANGLE(flags, idx[0], idx[1], idx[2]); + } + break; + + case PIPE_PRIM_TRIANGLE_STRIP: + if (count >= 3) { + flags = DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL; + idx[1] = GET_ELT(0); + idx[2] = GET_ELT(1); + + if (last_vertex_last) { + for (i = 0; i + 2 < count; i++) { + idx[0] = idx[1]; + idx[1] = idx[2]; + idx[2] = GET_ELT(i + 2); + /* always emit idx[2] last */ + if (i & 1) + TRIANGLE(flags, idx[1], idx[0], idx[2]); + else + TRIANGLE(flags, idx[0], idx[1], idx[2]); + } + } + else { + for (i = 0; i + 2 < count; i++) { + idx[0] = idx[1]; + idx[1] = idx[2]; + idx[2] = GET_ELT(i + 2); + /* always emit idx[0] first */ + if (i & 1) + TRIANGLE(flags, idx[0], idx[2], idx[1]); + else + TRIANGLE(flags, idx[0], idx[1], idx[2]); + } + } + } + break; + + case PIPE_PRIM_TRIANGLE_FAN: + if (count >= 3) { + flags = DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL; + idx[0] = GET_ELT(0); + idx[2] = GET_ELT(1); + + /* idx[0] is neither the first nor the last vertex */ + if (last_vertex_last) { + for (i = 0; i + 2 < count; i++) { + idx[1] = idx[2]; + idx[2] = GET_ELT(i + 2); + /* always emit idx[2] last */ + TRIANGLE(flags, idx[0], idx[1], idx[2]); + } + } + else { + for (i = 0; i + 2 < count; i++) { + idx[1] = idx[2]; + idx[2] = GET_ELT(i + 2); + /* always emit idx[1] first */ + TRIANGLE(flags, idx[1], idx[2], idx[0]); + } + } + } + break; + + case PIPE_PRIM_QUADS: + if (last_vertex_last) { + for (i = 0; i + 3 < count; i += 4) { + idx[0] = GET_ELT(i); + idx[1] = GET_ELT(i + 1); + idx[2] = GET_ELT(i + 2); + idx[3] = GET_ELT(i + 3); + + flags = DRAW_PIPE_RESET_STIPPLE | + DRAW_PIPE_EDGE_FLAG_0 | + DRAW_PIPE_EDGE_FLAG_2; + /* always emit idx[3] last */ + TRIANGLE(flags, idx[0], idx[1], idx[3]); + + flags = DRAW_PIPE_EDGE_FLAG_0 | + DRAW_PIPE_EDGE_FLAG_1; + TRIANGLE(flags, idx[1], idx[2], idx[3]); + } + } + else { + for (i = 0; i + 3 < count; i += 4) { + idx[0] = GET_ELT(i); + idx[1] = GET_ELT(i + 1); + idx[2] = GET_ELT(i + 2); + idx[3] = GET_ELT(i + 3); + + flags = DRAW_PIPE_RESET_STIPPLE | + DRAW_PIPE_EDGE_FLAG_0 | + DRAW_PIPE_EDGE_FLAG_1; + /* XXX should always emit idx[0] first */ + /* always emit idx[3] first */ + TRIANGLE(flags, idx[3], idx[0], idx[1]); + + flags = DRAW_PIPE_EDGE_FLAG_1 | + DRAW_PIPE_EDGE_FLAG_2; + TRIANGLE(flags, idx[3], idx[1], idx[2]); + } + } + break; + + case PIPE_PRIM_QUAD_STRIP: + if (count >= 4) { + idx[2] = GET_ELT(0); + idx[3] = GET_ELT(1); + + if (last_vertex_last) { + for (i = 0; i + 3 < count; i += 2) { + idx[0] = idx[2]; + idx[1] = idx[3]; + idx[2] = GET_ELT(i + 2); + idx[3] = GET_ELT(i + 3); + + /* always emit idx[3] last */ + flags = DRAW_PIPE_RESET_STIPPLE | + DRAW_PIPE_EDGE_FLAG_0 | + DRAW_PIPE_EDGE_FLAG_2; + TRIANGLE(flags, idx[2], idx[0], idx[3]); + + flags = DRAW_PIPE_EDGE_FLAG_0 | + DRAW_PIPE_EDGE_FLAG_1; + TRIANGLE(flags, idx[0], idx[1], idx[3]); + } + } + else { + for (i = 0; i + 3 < count; i += 2) { + idx[0] = idx[2]; + idx[1] = idx[3]; + idx[2] = GET_ELT(i + 2); + idx[3] = GET_ELT(i + 3); + + flags = DRAW_PIPE_RESET_STIPPLE | + DRAW_PIPE_EDGE_FLAG_0 | + DRAW_PIPE_EDGE_FLAG_1; + /* XXX should always emit idx[0] first */ + /* always emit idx[3] first */ + TRIANGLE(flags, idx[3], idx[2], idx[0]); + + flags = DRAW_PIPE_EDGE_FLAG_1 | + DRAW_PIPE_EDGE_FLAG_2; + TRIANGLE(flags, idx[3], idx[0], idx[1]); + } + } + } + break; + + case PIPE_PRIM_POLYGON: + if (count >= 3) { + ushort edge_next, edge_finish; + + if (last_vertex_last) { + flags = (DRAW_PIPE_RESET_STIPPLE | + DRAW_PIPE_EDGE_FLAG_2 | + DRAW_PIPE_EDGE_FLAG_0); + edge_next = DRAW_PIPE_EDGE_FLAG_0; + edge_finish = DRAW_PIPE_EDGE_FLAG_1; + } + else { + flags = (DRAW_PIPE_RESET_STIPPLE | + DRAW_PIPE_EDGE_FLAG_0 | + DRAW_PIPE_EDGE_FLAG_1); + edge_next = DRAW_PIPE_EDGE_FLAG_1; + edge_finish = DRAW_PIPE_EDGE_FLAG_2; + } + + idx[0] = GET_ELT(0); + idx[2] = GET_ELT(1); + + for (i = 0; i + 2 < count; i++, flags = edge_next) { + idx[1] = idx[2]; + idx[2] = GET_ELT(i + 2); + + if (i + 3 == count) + flags |= edge_finish; + + /* idx[0] is both the first and the last vertex */ + if (last_vertex_last) + TRIANGLE(flags, idx[1], idx[2], idx[0]); + else + TRIANGLE(flags, idx[0], idx[1], idx[2]); + } + } + break; + + case PIPE_PRIM_LINES_ADJACENCY: + flags = DRAW_PIPE_RESET_STIPPLE; + for (i = 0; i + 3 < count; i += 4) { + idx[0] = GET_ELT(i); + idx[1] = GET_ELT(i + 1); + idx[2] = GET_ELT(i + 2); + idx[3] = GET_ELT(i + 3); + LINE_ADJ(flags, idx[0], idx[1], idx[2], idx[3]); + } + break; + + case PIPE_PRIM_LINE_STRIP_ADJACENCY: + if (count >= 4) { + flags = DRAW_PIPE_RESET_STIPPLE; + idx[1] = GET_ELT(0); + idx[2] = GET_ELT(1); + idx[3] = GET_ELT(2); + + for (i = 1; i + 2 < count; i++, flags = 0) { + idx[0] = idx[1]; + idx[1] = idx[2]; + idx[2] = idx[3]; + idx[3] = GET_ELT(i + 2); + LINE_ADJ(flags, idx[0], idx[1], idx[2], idx[3]); + } + } + break; + + case PIPE_PRIM_TRIANGLES_ADJACENCY: + flags = DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL; + for (i = 0; i + 5 < count; i += 6) { + idx[0] = GET_ELT(i); + idx[1] = GET_ELT(i + 1); + idx[2] = GET_ELT(i + 2); + idx[3] = GET_ELT(i + 3); + idx[4] = GET_ELT(i + 4); + idx[5] = GET_ELT(i + 5); + TRIANGLE_ADJ(flags, idx[0], idx[1], idx[2], idx[3], idx[4], idx[5]); + } + break; + + case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY: + if (count >= 6) { + flags = DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL; + idx[0] = GET_ELT(1); + idx[2] = GET_ELT(0); + idx[4] = GET_ELT(2); + idx[3] = GET_ELT(4); + + /* + * The vertices of the i-th triangle are stored in + * idx[0,2,4] = { 2*i, 2*i+2, 2*i+4 }; + * + * The adjacent vertices are stored in + * idx[1,3,5] = { 2*i-2, 2*i+6, 2*i+3 }. + * + * However, there are two exceptions: + * + * For the first triangle, idx[1] = 1; + * For the last triangle, idx[3] = 2*i+5. + */ + if (last_vertex_last) { + for (i = 0; i + 5 < count; i += 2) { + idx[1] = idx[0]; + + idx[0] = idx[2]; + idx[2] = idx[4]; + idx[4] = idx[3]; + + idx[3] = GET_ELT(i + ((i + 7 < count) ? 6 : 5)); + idx[5] = GET_ELT(i + 3); + + /* + * alternate the first two vertices (idx[0] and idx[2]) and the + * corresponding adjacent vertices (idx[3] and idx[5]) to have + * the correct orientation + */ + if (i & 2) { + TRIANGLE_ADJ(flags, + idx[2], idx[1], idx[0], idx[5], idx[4], idx[3]); + } + else { + TRIANGLE_ADJ(flags, + idx[0], idx[1], idx[2], idx[3], idx[4], idx[5]); + } + } + } + else { + for (i = 0; i + 5 < count; i += 2) { + idx[1] = idx[0]; + + idx[0] = idx[2]; + idx[2] = idx[4]; + idx[4] = idx[3]; + + idx[3] = GET_ELT(i + ((i + 7 < count) ? 6 : 5)); + idx[5] = GET_ELT(i + 3); + + /* + * alternate the last two vertices (idx[2] and idx[4]) and the + * corresponding adjacent vertices (idx[1] and idx[5]) to have + * the correct orientation + */ + if (i & 2) { + TRIANGLE_ADJ(flags, + idx[0], idx[5], idx[4], idx[3], idx[2], idx[1]); + } + else { + TRIANGLE_ADJ(flags, + idx[0], idx[1], idx[2], idx[3], idx[4], idx[5]); + } + } + } + } + break; + + default: + assert(0); + break; + } + + FUNC_EXIT; +} + +#undef LOCAL_VARS +#undef FUNC_ENTER +#undef FUNC_EXIT +#undef LINE_ADJ +#undef TRIANGLE_ADJ + +#undef FUNC +#undef FUNC_VARS +#undef GET_ELT +#undef POINT +#undef LINE +#undef TRIANGLE |