| /* |
| * Mesa 3-D graphics library |
| * |
| * Copyright (C) 1999-2007 Brian Paul 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, 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. |
| */ |
| |
| #include "main/glheader.h" |
| #include "main/feedback.h" |
| #include "main/macros.h" |
| |
| #include "s_context.h" |
| #include "s_feedback.h" |
| #include "s_triangle.h" |
| |
| |
| |
| static void |
| feedback_vertex(struct gl_context * ctx, const SWvertex * v, const SWvertex * pv) |
| { |
| GLfloat win[4]; |
| const GLfloat *vtc = v->attrib[VARYING_SLOT_TEX0]; |
| const GLfloat *color = v->attrib[VARYING_SLOT_COL0]; |
| |
| win[0] = v->attrib[VARYING_SLOT_POS][0]; |
| win[1] = v->attrib[VARYING_SLOT_POS][1]; |
| win[2] = v->attrib[VARYING_SLOT_POS][2] / ctx->DrawBuffer->_DepthMaxF; |
| win[3] = 1.0F / v->attrib[VARYING_SLOT_POS][3]; |
| |
| _mesa_feedback_vertex(ctx, win, color, vtc); |
| } |
| |
| |
| /* |
| * Put triangle in feedback buffer. |
| */ |
| void |
| _swrast_feedback_triangle(struct gl_context *ctx, const SWvertex *v0, |
| const SWvertex *v1, const SWvertex *v2) |
| { |
| if (!_swrast_culltriangle(ctx, v0, v1, v2)) { |
| _mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN); |
| _mesa_feedback_token(ctx, (GLfloat) 3); /* three vertices */ |
| |
| if (ctx->Light.ShadeModel == GL_SMOOTH) { |
| feedback_vertex(ctx, v0, v0); |
| feedback_vertex(ctx, v1, v1); |
| feedback_vertex(ctx, v2, v2); |
| } |
| else { |
| feedback_vertex(ctx, v0, v2); |
| feedback_vertex(ctx, v1, v2); |
| feedback_vertex(ctx, v2, v2); |
| } |
| } |
| } |
| |
| |
| void |
| _swrast_feedback_line(struct gl_context *ctx, const SWvertex *v0, |
| const SWvertex *v1) |
| { |
| GLenum token = GL_LINE_TOKEN; |
| SWcontext *swrast = SWRAST_CONTEXT(ctx); |
| |
| if (swrast->StippleCounter == 0) |
| token = GL_LINE_RESET_TOKEN; |
| |
| _mesa_feedback_token(ctx, (GLfloat) (GLint) token); |
| |
| if (ctx->Light.ShadeModel == GL_SMOOTH) { |
| feedback_vertex(ctx, v0, v0); |
| feedback_vertex(ctx, v1, v1); |
| } |
| else { |
| feedback_vertex(ctx, v0, v1); |
| feedback_vertex(ctx, v1, v1); |
| } |
| |
| swrast->StippleCounter++; |
| } |
| |
| |
| void |
| _swrast_feedback_point(struct gl_context *ctx, const SWvertex *v) |
| { |
| _mesa_feedback_token(ctx, (GLfloat) (GLint) GL_POINT_TOKEN); |
| feedback_vertex(ctx, v, v); |
| } |
| |
| |
| void |
| _swrast_select_triangle(struct gl_context *ctx, const SWvertex *v0, |
| const SWvertex *v1, const SWvertex *v2) |
| { |
| if (!_swrast_culltriangle(ctx, v0, v1, v2)) { |
| const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF; |
| |
| _mesa_update_hitflag( ctx, v0->attrib[VARYING_SLOT_POS][2] * zs ); |
| _mesa_update_hitflag( ctx, v1->attrib[VARYING_SLOT_POS][2] * zs ); |
| _mesa_update_hitflag( ctx, v2->attrib[VARYING_SLOT_POS][2] * zs ); |
| } |
| } |
| |
| |
| void |
| _swrast_select_line(struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1) |
| { |
| const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF; |
| _mesa_update_hitflag( ctx, v0->attrib[VARYING_SLOT_POS][2] * zs ); |
| _mesa_update_hitflag( ctx, v1->attrib[VARYING_SLOT_POS][2] * zs ); |
| } |
| |
| |
| void |
| _swrast_select_point(struct gl_context *ctx, const SWvertex *v) |
| { |
| const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF; |
| _mesa_update_hitflag( ctx, v->attrib[VARYING_SLOT_POS][2] * zs ); |
| } |