0,0 → 1,343 |
/************************************************************************** |
* |
* Copyright 2007 VMware, Inc. |
* 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 VMWARE 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. |
* |
**************************************************************************/ |
|
/* Authors: Keith Whitwell <keithw@vmware.com> |
*/ |
|
#include "util/u_memory.h" |
#include "util/u_math.h" |
#include "util/u_prim.h" |
#include "pipe/p_defines.h" |
#include "draw_private.h" |
#include "draw_pipe.h" |
#include "draw_context.h" |
#include "draw_vbuf.h" |
|
|
/** |
* Default version of a function to check if we need any special |
* pipeline stages, or whether prims/verts can go through untouched. |
* Don't test for bypass clipping or vs modes, this function is just |
* about the primitive pipeline stages. |
* |
* This can be overridden by the driver. |
*/ |
boolean |
draw_need_pipeline(const struct draw_context *draw, |
const struct pipe_rasterizer_state *rasterizer, |
unsigned int prim ) |
{ |
unsigned reduced_prim = u_reduced_prim(prim); |
|
/* If the driver has overridden this, use that version: |
*/ |
if (draw->render && |
draw->render->need_pipeline) |
{ |
return draw->render->need_pipeline( draw->render, |
rasterizer, |
prim ); |
} |
|
/* Don't have to worry about triangles turning into lines/points |
* and triggering the pipeline, because we have to trigger the |
* pipeline *anyway* if unfilled mode is active. |
*/ |
if (reduced_prim == PIPE_PRIM_LINES) { |
/* line stipple */ |
if (rasterizer->line_stipple_enable && draw->pipeline.line_stipple) |
return TRUE; |
|
/* wide lines */ |
if (roundf(rasterizer->line_width) > draw->pipeline.wide_line_threshold) |
return TRUE; |
|
/* AA lines */ |
if (rasterizer->line_smooth && draw->pipeline.aaline) |
return TRUE; |
|
if (draw_current_shader_num_written_culldistances(draw)) |
return TRUE; |
} |
else if (reduced_prim == PIPE_PRIM_POINTS) { |
/* large points */ |
if (rasterizer->point_size > draw->pipeline.wide_point_threshold) |
return TRUE; |
|
/* sprite points */ |
if (rasterizer->point_quad_rasterization |
&& draw->pipeline.wide_point_sprites) |
return TRUE; |
|
/* AA points */ |
if (rasterizer->point_smooth && draw->pipeline.aapoint) |
return TRUE; |
|
/* point sprites */ |
if (rasterizer->sprite_coord_enable && draw->pipeline.point_sprite) |
return TRUE; |
} |
else if (reduced_prim == PIPE_PRIM_TRIANGLES) { |
/* polygon stipple */ |
if (rasterizer->poly_stipple_enable && draw->pipeline.pstipple) |
return TRUE; |
|
/* unfilled polygons */ |
if (rasterizer->fill_front != PIPE_POLYGON_MODE_FILL || |
rasterizer->fill_back != PIPE_POLYGON_MODE_FILL) |
return TRUE; |
|
/* polygon offset */ |
if (rasterizer->offset_point || |
rasterizer->offset_line || |
rasterizer->offset_tri) |
return TRUE; |
|
/* two-side lighting */ |
if (rasterizer->light_twoside) |
return TRUE; |
|
if (draw_current_shader_num_written_culldistances(draw)) |
return TRUE; |
} |
|
/* polygon cull - this is difficult - hardware can cull just fine |
* most of the time (though sometimes CULL_NEITHER is unsupported. |
* |
* Generally this isn't a reason to require the pipeline, though. |
* |
if (rasterizer->cull_mode) |
return TRUE; |
*/ |
|
return FALSE; |
} |
|
|
|
/** |
* Rebuild the rendering pipeline. |
*/ |
static struct draw_stage *validate_pipeline( struct draw_stage *stage ) |
{ |
struct draw_context *draw = stage->draw; |
struct draw_stage *next = draw->pipeline.rasterize; |
boolean need_det = FALSE; |
boolean precalc_flat = FALSE; |
boolean wide_lines, wide_points; |
const struct pipe_rasterizer_state *rast = draw->rasterizer; |
|
/* Set the validate's next stage to the rasterize stage, so that it |
* can be found later if needed for flushing. |
*/ |
stage->next = next; |
|
/* drawing wide lines? */ |
wide_lines = (roundf(rast->line_width) > draw->pipeline.wide_line_threshold |
&& !rast->line_smooth); |
|
/* drawing large/sprite points (but not AA points)? */ |
if (rast->sprite_coord_enable && draw->pipeline.point_sprite) |
wide_points = TRUE; |
else if (rast->point_smooth && draw->pipeline.aapoint) |
wide_points = FALSE; |
else if (rast->point_size > draw->pipeline.wide_point_threshold) |
wide_points = TRUE; |
else if (rast->point_quad_rasterization && draw->pipeline.wide_point_sprites) |
wide_points = TRUE; |
else |
wide_points = FALSE; |
|
/* |
* NOTE: we build up the pipeline in end-to-start order. |
* |
* TODO: make the current primitive part of the state and build |
* shorter pipelines for lines & points. |
*/ |
|
if (rast->line_smooth && draw->pipeline.aaline) { |
draw->pipeline.aaline->next = next; |
next = draw->pipeline.aaline; |
precalc_flat = TRUE; |
} |
|
if (rast->point_smooth && draw->pipeline.aapoint) { |
draw->pipeline.aapoint->next = next; |
next = draw->pipeline.aapoint; |
} |
|
if (wide_lines) { |
draw->pipeline.wide_line->next = next; |
next = draw->pipeline.wide_line; |
precalc_flat = TRUE; |
} |
|
if (wide_points) { |
draw->pipeline.wide_point->next = next; |
next = draw->pipeline.wide_point; |
} |
|
if (rast->line_stipple_enable && draw->pipeline.line_stipple) { |
draw->pipeline.stipple->next = next; |
next = draw->pipeline.stipple; |
precalc_flat = TRUE; /* only needed for lines really */ |
} |
|
if (rast->poly_stipple_enable |
&& draw->pipeline.pstipple) { |
draw->pipeline.pstipple->next = next; |
next = draw->pipeline.pstipple; |
} |
|
if (rast->fill_front != PIPE_POLYGON_MODE_FILL || |
rast->fill_back != PIPE_POLYGON_MODE_FILL) { |
draw->pipeline.unfilled->next = next; |
next = draw->pipeline.unfilled; |
precalc_flat = TRUE; /* only needed for triangles really */ |
need_det = TRUE; |
} |
|
if (precalc_flat) { |
/* |
* could only run the stage if either rast->flatshade is true |
* or there's constant interpolated values. |
*/ |
draw->pipeline.flatshade->next = next; |
next = draw->pipeline.flatshade; |
} |
|
if (rast->offset_point || |
rast->offset_line || |
rast->offset_tri) { |
draw->pipeline.offset->next = next; |
next = draw->pipeline.offset; |
need_det = TRUE; |
} |
|
if (rast->light_twoside) { |
draw->pipeline.twoside->next = next; |
next = draw->pipeline.twoside; |
need_det = TRUE; |
} |
|
/* Always run the cull stage as we calculate determinant there |
* also. |
* |
* This can actually be a win as culling out the triangles can lead |
* to less work emitting vertices, smaller vertex buffers, etc. |
* It's difficult to say whether this will be true in general. |
*/ |
if (need_det || rast->cull_face != PIPE_FACE_NONE || |
draw_current_shader_num_written_culldistances(draw)) { |
draw->pipeline.cull->next = next; |
next = draw->pipeline.cull; |
} |
|
/* Clip stage |
*/ |
if (draw->clip_xy || draw->clip_z || draw->clip_user) |
{ |
draw->pipeline.clip->next = next; |
next = draw->pipeline.clip; |
} |
|
draw->pipeline.first = next; |
|
if (0) { |
debug_printf("draw pipeline:\n"); |
for (next = draw->pipeline.first; next ; next = next->next ) |
debug_printf(" %s\n", next->name); |
debug_printf("\n"); |
} |
|
return draw->pipeline.first; |
} |
|
static void validate_tri( struct draw_stage *stage, |
struct prim_header *header ) |
{ |
struct draw_stage *pipeline = validate_pipeline( stage ); |
pipeline->tri( pipeline, header ); |
} |
|
static void validate_line( struct draw_stage *stage, |
struct prim_header *header ) |
{ |
struct draw_stage *pipeline = validate_pipeline( stage ); |
pipeline->line( pipeline, header ); |
} |
|
static void validate_point( struct draw_stage *stage, |
struct prim_header *header ) |
{ |
struct draw_stage *pipeline = validate_pipeline( stage ); |
pipeline->point( pipeline, header ); |
} |
|
static void validate_reset_stipple_counter( struct draw_stage *stage ) |
{ |
struct draw_stage *pipeline = validate_pipeline( stage ); |
pipeline->reset_stipple_counter( pipeline ); |
} |
|
static void validate_flush( struct draw_stage *stage, |
unsigned flags ) |
{ |
/* May need to pass a backend flush on to the rasterize stage. |
*/ |
if (stage->next) |
stage->next->flush( stage->next, flags ); |
} |
|
|
static void validate_destroy( struct draw_stage *stage ) |
{ |
FREE( stage ); |
} |
|
|
/** |
* Create validate pipeline stage. |
*/ |
struct draw_stage *draw_validate_stage( struct draw_context *draw ) |
{ |
struct draw_stage *stage = CALLOC_STRUCT(draw_stage); |
if (stage == NULL) |
return NULL; |
|
stage->draw = draw; |
stage->name = "validate"; |
stage->next = NULL; |
stage->point = validate_point; |
stage->line = validate_line; |
stage->tri = validate_tri; |
stage->flush = validate_flush; |
stage->reset_stipple_counter = validate_reset_stipple_counter; |
stage->destroy = validate_destroy; |
|
return stage; |
} |