0,0 → 1,137 |
/* |
* 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" |
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#include "s_context.h" |
#include "s_feedback.h" |
#include "s_triangle.h" |
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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); |
} |
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/* |
* 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 */ |
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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); |
} |
} |
} |
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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; |
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_mesa_feedback_token(ctx, (GLfloat) (GLint) token); |
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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); |
} |
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swrast->StippleCounter++; |
} |
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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); |
} |
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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 ); |
} |
} |
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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 ); |
} |
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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 ); |
} |