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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5564 | serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2007 VMware, Inc. |
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| 4 | * All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the |
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| 8 | * "Software"), to deal in the Software without restriction, including |
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| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 11 | * permit persons to whom the Software is furnished to do so, subject to |
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| 12 | * the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice (including the |
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| 15 | * next paragraph) shall be included in all copies or substantial portions |
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| 16 | * of the Software. |
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| 17 | * |
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| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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| 21 | * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR |
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| 22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 24 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 25 | * |
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| 26 | **************************************************************************/ |
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| 27 | |||
| 28 | /* |
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| 29 | * Authors: |
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| 30 | * Keith Whitwell |
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| 31 | */ |
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| 32 | |||
| 33 | #include "draw/draw_context.h" |
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| 34 | #include "draw/draw_private.h" |
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| 35 | #include "draw/draw_pt.h" |
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| 36 | #include "util/u_debug.h" |
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| 37 | |||
| 38 | void draw_pt_split_prim(unsigned prim, unsigned *first, unsigned *incr) |
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| 39 | { |
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| 40 | switch (prim) { |
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| 41 | case PIPE_PRIM_POINTS: |
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| 42 | *first = 1; |
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| 43 | *incr = 1; |
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| 44 | break; |
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| 45 | case PIPE_PRIM_LINES: |
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| 46 | *first = 2; |
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| 47 | *incr = 2; |
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| 48 | break; |
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| 49 | case PIPE_PRIM_LINE_STRIP: |
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| 50 | case PIPE_PRIM_LINE_LOOP: |
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| 51 | *first = 2; |
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| 52 | *incr = 1; |
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| 53 | break; |
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| 54 | case PIPE_PRIM_LINES_ADJACENCY: |
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| 55 | *first = 4; |
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| 56 | *incr = 4; |
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| 57 | break; |
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| 58 | case PIPE_PRIM_LINE_STRIP_ADJACENCY: |
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| 59 | *first = 4; |
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| 60 | *incr = 1; |
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| 61 | break; |
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| 62 | case PIPE_PRIM_TRIANGLES: |
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| 63 | *first = 3; |
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| 64 | *incr = 3; |
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| 65 | break; |
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| 66 | case PIPE_PRIM_TRIANGLES_ADJACENCY: |
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| 67 | *first = 6; |
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| 68 | *incr = 6; |
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| 69 | break; |
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| 70 | case PIPE_PRIM_TRIANGLE_STRIP: |
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| 71 | case PIPE_PRIM_TRIANGLE_FAN: |
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| 72 | case PIPE_PRIM_POLYGON: |
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| 73 | *first = 3; |
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| 74 | *incr = 1; |
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| 75 | break; |
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| 76 | case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY: |
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| 77 | *first = 6; |
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| 78 | *incr = 2; |
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| 79 | break; |
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| 80 | case PIPE_PRIM_QUADS: |
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| 81 | *first = 4; |
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| 82 | *incr = 4; |
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| 83 | break; |
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| 84 | case PIPE_PRIM_QUAD_STRIP: |
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| 85 | *first = 4; |
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| 86 | *incr = 2; |
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| 87 | break; |
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| 88 | default: |
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| 89 | assert(0); |
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| 90 | *first = 0; |
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| 91 | *incr = 1; /* set to one so that count % incr works */ |
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| 92 | break; |
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| 93 | } |
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| 94 | } |
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| 95 | |||
| 96 | unsigned draw_pt_trim_count(unsigned count, unsigned first, unsigned incr) |
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| 97 | { |
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| 98 | if (count < first) |
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| 99 | return 0; |
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| 100 | return count - (count - first) % incr; |
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| 101 | } |