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| Rev | Author | Line No. | Line |
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| 1901 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
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| 3 | * Version: 7.0 |
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| 4 | * |
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| 5 | * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. |
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| 6 | * |
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| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 8 | * copy of this software and associated documentation files (the "Software"), |
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| 9 | * to deal in the Software without restriction, including without limitation |
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| 10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 11 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 12 | * Software is furnished to do so, subject to the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice shall be included |
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| 15 | * in all copies or substantial portions of the Software. |
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| 16 | * |
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| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 20 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
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| 21 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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| 22 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 23 | */ |
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| 24 | |||
| 25 | #include "main/glheader.h" |
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| 26 | #include "main/colormac.h" |
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| 27 | #include "main/feedback.h" |
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| 28 | #include "main/macros.h" |
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| 29 | |||
| 30 | #include "s_context.h" |
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| 31 | #include "s_feedback.h" |
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| 32 | #include "s_triangle.h" |
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| 33 | |||
| 34 | |||
| 35 | |||
| 36 | static void |
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| 37 | feedback_vertex(struct gl_context * ctx, const SWvertex * v, const SWvertex * pv) |
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| 38 | { |
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| 39 | GLfloat win[4]; |
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| 40 | const GLfloat *vtc = v->attrib[FRAG_ATTRIB_TEX0]; |
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| 41 | const GLfloat *color = v->attrib[FRAG_ATTRIB_COL0]; |
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| 42 | |||
| 43 | win[0] = v->attrib[FRAG_ATTRIB_WPOS][0]; |
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| 44 | win[1] = v->attrib[FRAG_ATTRIB_WPOS][1]; |
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| 45 | win[2] = v->attrib[FRAG_ATTRIB_WPOS][2] / ctx->DrawBuffer->_DepthMaxF; |
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| 46 | win[3] = 1.0F / v->attrib[FRAG_ATTRIB_WPOS][3]; |
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| 47 | |||
| 48 | _mesa_feedback_vertex(ctx, win, color, vtc); |
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| 49 | } |
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| 50 | |||
| 51 | |||
| 52 | /* |
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| 53 | * Put triangle in feedback buffer. |
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| 54 | */ |
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| 55 | void |
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| 56 | _swrast_feedback_triangle(struct gl_context *ctx, const SWvertex *v0, |
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| 57 | const SWvertex *v1, const SWvertex *v2) |
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| 58 | { |
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| 59 | if (!_swrast_culltriangle(ctx, v0, v1, v2)) { |
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| 60 | _mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN); |
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| 61 | _mesa_feedback_token(ctx, (GLfloat) 3); /* three vertices */ |
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| 62 | |||
| 63 | if (ctx->Light.ShadeModel == GL_SMOOTH) { |
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| 64 | feedback_vertex(ctx, v0, v0); |
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| 65 | feedback_vertex(ctx, v1, v1); |
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| 66 | feedback_vertex(ctx, v2, v2); |
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| 67 | } |
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| 68 | else { |
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| 69 | feedback_vertex(ctx, v0, v2); |
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| 70 | feedback_vertex(ctx, v1, v2); |
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| 71 | feedback_vertex(ctx, v2, v2); |
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| 72 | } |
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| 73 | } |
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| 74 | } |
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| 75 | |||
| 76 | |||
| 77 | void |
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| 78 | _swrast_feedback_line(struct gl_context *ctx, const SWvertex *v0, |
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| 79 | const SWvertex *v1) |
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| 80 | { |
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| 81 | GLenum token = GL_LINE_TOKEN; |
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| 82 | SWcontext *swrast = SWRAST_CONTEXT(ctx); |
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| 83 | |||
| 84 | if (swrast->StippleCounter == 0) |
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| 85 | token = GL_LINE_RESET_TOKEN; |
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| 86 | |||
| 87 | _mesa_feedback_token(ctx, (GLfloat) (GLint) token); |
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| 88 | |||
| 89 | if (ctx->Light.ShadeModel == GL_SMOOTH) { |
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| 90 | feedback_vertex(ctx, v0, v0); |
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| 91 | feedback_vertex(ctx, v1, v1); |
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| 92 | } |
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| 93 | else { |
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| 94 | feedback_vertex(ctx, v0, v1); |
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| 95 | feedback_vertex(ctx, v1, v1); |
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| 96 | } |
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| 97 | |||
| 98 | swrast->StippleCounter++; |
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| 99 | } |
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| 100 | |||
| 101 | |||
| 102 | void |
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| 103 | _swrast_feedback_point(struct gl_context *ctx, const SWvertex *v) |
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| 104 | { |
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| 105 | _mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POINT_TOKEN); |
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| 106 | feedback_vertex(ctx, v, v); |
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| 107 | } |
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| 108 | |||
| 109 | |||
| 110 | void |
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| 111 | _swrast_select_triangle(struct gl_context *ctx, const SWvertex *v0, |
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| 112 | const SWvertex *v1, const SWvertex *v2) |
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| 113 | { |
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| 114 | if (!_swrast_culltriangle(ctx, v0, v1, v2)) { |
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| 115 | const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF; |
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| 116 | |||
| 117 | _mesa_update_hitflag( ctx, v0->attrib[FRAG_ATTRIB_WPOS][2] * zs ); |
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| 118 | _mesa_update_hitflag( ctx, v1->attrib[FRAG_ATTRIB_WPOS][2] * zs ); |
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| 119 | _mesa_update_hitflag( ctx, v2->attrib[FRAG_ATTRIB_WPOS][2] * zs ); |
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| 120 | } |
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| 121 | } |
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| 122 | |||
| 123 | |||
| 124 | void |
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| 125 | _swrast_select_line(struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1) |
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| 126 | { |
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| 127 | const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF; |
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| 128 | _mesa_update_hitflag( ctx, v0->attrib[FRAG_ATTRIB_WPOS][2] * zs ); |
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| 129 | _mesa_update_hitflag( ctx, v1->attrib[FRAG_ATTRIB_WPOS][2] * zs ); |
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| 130 | } |
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| 131 | |||
| 132 | |||
| 133 | void |
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| 134 | _swrast_select_point(struct gl_context *ctx, const SWvertex *v) |
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| 135 | { |
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| 136 | const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF; |
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| 137 | _mesa_update_hitflag( ctx, v->attrib[FRAG_ATTRIB_WPOS][2] * zs ); |
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| 138 | } |