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Implement AA points and AA coverage application in quad pipeline.

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This commit is contained in:
Brian
2007-07-13 10:33:48 -06:00
parent 5796056e28
commit 46bba80a54
8 changed files with 155 additions and 26 deletions
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1
src/mesa/pipe/softpipe/sp_context.c
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@@ -105,6 +105,7 @@ struct pipe_context *softpipe_create( void )
softpipe->quad.depth_test = sp_quad_depth_test_stage(softpipe);
softpipe->quad.stencil_test = sp_quad_stencil_test_stage(softpipe);
softpipe->quad.occlusion = sp_quad_occlusion_stage(softpipe);
softpipe->quad.coverage = sp_quad_coverage_stage(softpipe);
softpipe->quad.bufloop = sp_quad_bufloop_stage(softpipe);
softpipe->quad.blend = sp_quad_blend_stage(softpipe);
softpipe->quad.colormask = sp_quad_colormask_stage(softpipe);

1
src/mesa/pipe/softpipe/sp_context.h
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@@ -125,6 +125,7 @@ struct softpipe_context {
struct quad_stage *stencil_test;
struct quad_stage *depth_test;
struct quad_stage *occlusion;
struct quad_stage *coverage;
struct quad_stage *bufloop;
struct quad_stage *blend;
struct quad_stage *colormask;

2
src/mesa/pipe/softpipe/sp_headers.h
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@@ -81,6 +81,8 @@ struct quad_header {
GLfloat depth[QUAD_SIZE];
} outputs;
GLfloat coverage[QUAD_SIZE]; /** fragment coverage for antialiasing */
const struct setup_coefficient *coef;
const enum interp_mode *interp; /* XXX: this information should be

89
src/mesa/pipe/softpipe/sp_prim_setup.c
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@@ -858,60 +858,97 @@ setup_point(struct draw_stage *stage, struct prim_header *prim)
const GLint ixmax = block((GLint) (x + halfSize));
const GLint iymin = block((GLint) (y - halfSize));
const GLint iymax = block((GLint) (y + halfSize));
GLfloat halfSizeSquared = halfSize * halfSize;
GLint ix, iy;
for (iy = iymin; iy <= iymax; iy += 2) {
for (ix = ixmin; ix <= ixmax; ix += 2) {
if (round) {
/* rounded points */
const GLfloat rmin = halfSize - 0.7071F; /* 0.7071 = sqrt(2)/2 */
const GLfloat rmax = halfSize + 0.7071F;
const GLfloat rmin2 = MAX2(0.0F, rmin * rmin);
const GLfloat rmax2 = rmax * rmax;
const GLfloat cscale = 1.0F / (rmax2 - rmin2);
if (round) {
/* rounded points */
/* XXX for GL_SMOOTH, need to compute per-fragment coverage too */
GLfloat dx, dy;
for (iy = iymin; iy <= iymax; iy += 2) {
for (ix = ixmin; ix <= ixmax; ix += 2) {
GLfloat dx, dy, dist2, cover;
setup->quad.mask = 0x0;
dx = (ix + 0.5) - x;
dy = (iy + 0.5) - y;
if (dx * dx + dy * dy <= halfSizeSquared)
dist2 = dx * dx + dy * dy;
if (dist2 <= rmax2) {
cover = 1.0F - (dist2 - rmin2) * cscale;
setup->quad.coverage[QUAD_BOTTOM_LEFT] = MIN2(cover, 1.0);
setup->quad.mask |= MASK_BOTTOM_LEFT;
}
dx = (ix + 1.5) - x;
dy = (iy + 0.5) - y;
if (dx * dx + dy * dy <= halfSizeSquared)
dist2 = dx * dx + dy * dy;
if (dist2 <= rmax2) {
cover = 1.0F - (dist2 - rmin2) * cscale;
setup->quad.coverage[QUAD_BOTTOM_RIGHT] = MIN2(cover, 1.0);
setup->quad.mask |= MASK_BOTTOM_RIGHT;
}
dx = (ix + 0.5) - x;
dy = (iy + 1.5) - y;
if (dx * dx + dy * dy <= halfSizeSquared)
dist2 = dx * dx + dy * dy;
if (dist2 <= rmax2) {
cover = 1.0F - (dist2 - rmin2) * cscale;
setup->quad.coverage[QUAD_TOP_LEFT] = MIN2(cover, 1.0);
setup->quad.mask |= MASK_TOP_LEFT;
}
dx = (ix + 1.5) - x;
dy = (iy + 1.5) - y;
if (dx * dx + dy * dy <= halfSizeSquared)
dist2 = dx * dx + dy * dy;
if (dist2 <= rmax2) {
cover = 1.0F - (dist2 - rmin2) * cscale;
setup->quad.coverage[QUAD_TOP_RIGHT] = MIN2(cover, 1.0);
setup->quad.mask |= MASK_TOP_RIGHT;
}
if (setup->quad.mask) {
setup->quad.x0 = ix;
setup->quad.y0 = iy;
quad_emit( setup->softpipe, &setup->quad );
}
}
else {
/* square points */
}
}
else {
/* square points */
for (iy = iymin; iy <= iymax; iy += 2) {
for (ix = ixmin; ix <= ixmax; ix += 2) {
setup->quad.mask = 0xf;
if (ix + 0.5 < x - halfSize)
setup->quad.mask &= (MASK_BOTTOM_RIGHT | MASK_TOP_RIGHT);
if (ix + 0.5 < x - halfSize) {
/* fragment is past left edge of point, turn off left bits */
setup->quad.mask &= ~(MASK_BOTTOM_LEFT | MASK_TOP_LEFT);
}
if (ix + 1.5 > x + halfSize)
setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_TOP_LEFT);
if (ix + 1.5 > x + halfSize) {
/* past the right edge */
setup->quad.mask &= ~(MASK_BOTTOM_RIGHT | MASK_TOP_RIGHT);
}
if (iy + 0.5 < y - halfSize)
setup->quad.mask &= (MASK_TOP_LEFT | MASK_TOP_RIGHT);
if (iy + 0.5 < y - halfSize) {
/* below the bottom edge */
setup->quad.mask &= ~(MASK_BOTTOM_LEFT | MASK_BOTTOM_RIGHT);
}
if (iy + 1.5 > y + halfSize)
setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_BOTTOM_RIGHT);
}
if (iy + 1.5 > y + halfSize) {
/* above the top edge */
setup->quad.mask &= ~(MASK_TOP_LEFT | MASK_TOP_RIGHT);
}
if (setup->quad.mask) {
setup->quad.x0 = ix;
setup->quad.y0 = iy;
quad_emit( setup->softpipe, &setup->quad );
if (setup->quad.mask) {
setup->quad.x0 = ix;
setup->quad.y0 = iy;
quad_emit( setup->softpipe, &setup->quad );
}
}
}
}

7
src/mesa/pipe/softpipe/sp_quad.c
View File

@@ -36,6 +36,13 @@ sp_build_quad_pipeline(struct softpipe_context *sp)
sp->quad.first = sp->quad.occlusion;
}
if (sp->setup.poly_smooth ||
sp->setup.line_smooth ||
sp->setup.point_smooth) {
sp->quad.coverage->next = sp->quad.first;
sp->quad.first = sp->quad.coverage;
}
if ( sp->stencil.front_enabled
|| sp->stencil.front_enabled) {
sp->quad.stencil_test->next = sp->quad.first;

1
src/mesa/pipe/softpipe/sp_quad.h
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@@ -52,6 +52,7 @@ struct quad_stage *sp_quad_alpha_test_stage( struct softpipe_context *softpipe )
struct quad_stage *sp_quad_stencil_test_stage( struct softpipe_context *softpipe );
struct quad_stage *sp_quad_depth_test_stage( struct softpipe_context *softpipe );
struct quad_stage *sp_quad_occlusion_stage( struct softpipe_context *softpipe );
struct quad_stage *sp_quad_coverage_stage( struct softpipe_context *softpipe );
struct quad_stage *sp_quad_bufloop_stage( struct softpipe_context *softpipe );
struct quad_stage *sp_quad_blend_stage( struct softpipe_context *softpipe );
struct quad_stage *sp_quad_colormask_stage( struct softpipe_context *softpipe );

79
src/mesa/pipe/softpipe/sp_quad_coverage.c Normal file
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@@ -0,0 +1,79 @@
/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
/**
* \brief Apply AA coverage to quad alpha valus
* \author Brian Paul
*/
#include "main/glheader.h"
#include "main/macros.h"
#include "pipe/p_defines.h"
#include "sp_context.h"
#include "sp_headers.h"
#include "sp_quad.h"
/**
* Multiply quad's alpha values by the fragment coverage.
*/
static void
apply_aa_coverage_quad(struct quad_stage *qs, struct quad_header *quad)
{
#if 0
struct softpipe_context *softpipe = qs->softpipe;
/* XXX need to know if this quad is from a point, line or polygon! */
if ((softpipe->setup.poly_smooth && prim == POLYGON) ||
(softpipe->setup.line_smooth && prim == LINE) ||
(softpipe->setup.point_smooth && prim == POINT)) {
#endif
GLuint j;
for (j = 0; j < QUAD_SIZE; j++) {
assert(quad->coverage[j] >= 0.0);
assert(quad->coverage[j] <= 1.0);
quad->outputs.color[3][j] *= quad->coverage[j];
}
#if 0
}
#endif
qs->next->run(qs->next, quad);
}
struct quad_stage *sp_quad_coverage_stage( struct softpipe_context *softpipe )
{
struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
stage->softpipe = softpipe;
stage->run = apply_aa_coverage_quad;
return stage;
}

1
src/mesa/sources
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@@ -162,6 +162,7 @@ SOFTPIPE_SOURCES = \
pipe/softpipe/sp_quad_blend.c \
pipe/softpipe/sp_quad_bufloop.c \
pipe/softpipe/sp_quad_colormask.c \
pipe/softpipe/sp_quad_coverage.c \
pipe/softpipe/sp_quad_depth_test.c \
pipe/softpipe/sp_quad_fs.c \
pipe/softpipe/sp_quad_occlusion.c \