forked from KolibriOS/kolibrios
283 lines
7.8 KiB
C
283 lines
7.8 KiB
C
/**************************************************************************
|
|
*
|
|
* 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.
|
|
*
|
|
**************************************************************************/
|
|
|
|
/* Authors: Keith Whitwell <keith@tungstengraphics.com>
|
|
*/
|
|
|
|
#include "util/u_math.h"
|
|
#include "util/u_memory.h"
|
|
|
|
#include "pipe/p_shader_tokens.h"
|
|
#include "draw_vs.h"
|
|
#include "draw_pipe.h"
|
|
|
|
|
|
/** subclass of draw_stage */
|
|
struct flat_stage
|
|
{
|
|
struct draw_stage stage;
|
|
|
|
uint num_color_attribs;
|
|
uint color_attribs[2]; /* front/back primary colors */
|
|
|
|
uint num_spec_attribs;
|
|
uint spec_attribs[2]; /* front/back secondary colors */
|
|
};
|
|
|
|
#define COPY_3FV( DST, SRC ) \
|
|
do { \
|
|
(DST)[0] = (SRC)[0]; \
|
|
(DST)[1] = (SRC)[1]; \
|
|
(DST)[2] = (SRC)[2]; \
|
|
} while (0)
|
|
|
|
|
|
static INLINE struct flat_stage *
|
|
flat_stage(struct draw_stage *stage)
|
|
{
|
|
return (struct flat_stage *) stage;
|
|
}
|
|
|
|
|
|
/** Copy all the color attributes from 'src' vertex to 'dst' vertex */
|
|
static INLINE void copy_colors( struct draw_stage *stage,
|
|
struct vertex_header *dst,
|
|
const struct vertex_header *src )
|
|
{
|
|
const struct flat_stage *flat = flat_stage(stage);
|
|
uint i;
|
|
|
|
for (i = 0; i < flat->num_color_attribs; i++) {
|
|
const uint attr = flat->color_attribs[i];
|
|
COPY_4FV(dst->data[attr], src->data[attr]);
|
|
}
|
|
|
|
for (i = 0; i < flat->num_spec_attribs; i++) {
|
|
const uint attr = flat->spec_attribs[i];
|
|
COPY_3FV(dst->data[attr], src->data[attr]);
|
|
}
|
|
}
|
|
|
|
|
|
/** Copy all the color attributes from src vertex to dst0 & dst1 vertices */
|
|
static INLINE void copy_colors2( struct draw_stage *stage,
|
|
struct vertex_header *dst0,
|
|
struct vertex_header *dst1,
|
|
const struct vertex_header *src )
|
|
{
|
|
const struct flat_stage *flat = flat_stage(stage);
|
|
uint i;
|
|
for (i = 0; i < flat->num_color_attribs; i++) {
|
|
const uint attr = flat->color_attribs[i];
|
|
COPY_4FV(dst0->data[attr], src->data[attr]);
|
|
COPY_4FV(dst1->data[attr], src->data[attr]);
|
|
}
|
|
|
|
for (i = 0; i < flat->num_spec_attribs; i++) {
|
|
const uint attr = flat->spec_attribs[i];
|
|
COPY_3FV(dst0->data[attr], src->data[attr]);
|
|
COPY_3FV(dst1->data[attr], src->data[attr]);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Flatshade tri. Required for clipping and when unfilled tris are
|
|
* active, otherwise handled by hardware.
|
|
*/
|
|
static void flatshade_tri_0( struct draw_stage *stage,
|
|
struct prim_header *header )
|
|
{
|
|
struct prim_header tmp;
|
|
|
|
tmp.det = header->det;
|
|
tmp.flags = header->flags;
|
|
tmp.pad = header->pad;
|
|
tmp.v[0] = header->v[0];
|
|
tmp.v[1] = dup_vert(stage, header->v[1], 0);
|
|
tmp.v[2] = dup_vert(stage, header->v[2], 1);
|
|
|
|
copy_colors2(stage, tmp.v[1], tmp.v[2], tmp.v[0]);
|
|
|
|
stage->next->tri( stage->next, &tmp );
|
|
}
|
|
|
|
|
|
static void flatshade_tri_2( struct draw_stage *stage,
|
|
struct prim_header *header )
|
|
{
|
|
struct prim_header tmp;
|
|
|
|
tmp.det = header->det;
|
|
tmp.flags = header->flags;
|
|
tmp.pad = header->pad;
|
|
tmp.v[0] = dup_vert(stage, header->v[0], 0);
|
|
tmp.v[1] = dup_vert(stage, header->v[1], 1);
|
|
tmp.v[2] = header->v[2];
|
|
|
|
copy_colors2(stage, tmp.v[0], tmp.v[1], tmp.v[2]);
|
|
|
|
stage->next->tri( stage->next, &tmp );
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Flatshade line. Required for clipping.
|
|
*/
|
|
static void flatshade_line_0( struct draw_stage *stage,
|
|
struct prim_header *header )
|
|
{
|
|
struct prim_header tmp;
|
|
|
|
tmp.v[0] = header->v[0];
|
|
tmp.v[1] = dup_vert(stage, header->v[1], 0);
|
|
|
|
copy_colors(stage, tmp.v[1], tmp.v[0]);
|
|
|
|
stage->next->line( stage->next, &tmp );
|
|
}
|
|
|
|
static void flatshade_line_1( struct draw_stage *stage,
|
|
struct prim_header *header )
|
|
{
|
|
struct prim_header tmp;
|
|
|
|
tmp.v[0] = dup_vert(stage, header->v[0], 0);
|
|
tmp.v[1] = header->v[1];
|
|
|
|
copy_colors(stage, tmp.v[0], tmp.v[1]);
|
|
|
|
stage->next->line( stage->next, &tmp );
|
|
}
|
|
|
|
|
|
|
|
|
|
static void flatshade_init_state( struct draw_stage *stage )
|
|
{
|
|
struct flat_stage *flat = flat_stage(stage);
|
|
const struct draw_vertex_shader *vs = stage->draw->vs.vertex_shader;
|
|
uint i;
|
|
|
|
/* Find which vertex shader outputs are colors, make a list */
|
|
flat->num_color_attribs = 0;
|
|
flat->num_spec_attribs = 0;
|
|
for (i = 0; i < vs->info.num_outputs; i++) {
|
|
if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_COLOR ||
|
|
vs->info.output_semantic_name[i] == TGSI_SEMANTIC_BCOLOR) {
|
|
if (vs->info.output_semantic_index[i] == 0)
|
|
flat->color_attribs[flat->num_color_attribs++] = i;
|
|
else
|
|
flat->spec_attribs[flat->num_spec_attribs++] = i;
|
|
}
|
|
}
|
|
|
|
/* Choose flatshade routine according to provoking vertex:
|
|
*/
|
|
if (stage->draw->rasterizer->flatshade_first) {
|
|
stage->line = flatshade_line_0;
|
|
stage->tri = flatshade_tri_0;
|
|
}
|
|
else {
|
|
stage->line = flatshade_line_1;
|
|
stage->tri = flatshade_tri_2;
|
|
}
|
|
}
|
|
|
|
static void flatshade_first_tri( struct draw_stage *stage,
|
|
struct prim_header *header )
|
|
{
|
|
flatshade_init_state( stage );
|
|
stage->tri( stage, header );
|
|
}
|
|
|
|
static void flatshade_first_line( struct draw_stage *stage,
|
|
struct prim_header *header )
|
|
{
|
|
flatshade_init_state( stage );
|
|
stage->line( stage, header );
|
|
}
|
|
|
|
|
|
static void flatshade_flush( struct draw_stage *stage,
|
|
unsigned flags )
|
|
{
|
|
stage->tri = flatshade_first_tri;
|
|
stage->line = flatshade_first_line;
|
|
stage->next->flush( stage->next, flags );
|
|
}
|
|
|
|
|
|
static void flatshade_reset_stipple_counter( struct draw_stage *stage )
|
|
{
|
|
stage->next->reset_stipple_counter( stage->next );
|
|
}
|
|
|
|
|
|
static void flatshade_destroy( struct draw_stage *stage )
|
|
{
|
|
draw_free_temp_verts( stage );
|
|
FREE( stage );
|
|
}
|
|
|
|
|
|
/**
|
|
* Create flatshading drawing stage.
|
|
*/
|
|
struct draw_stage *draw_flatshade_stage( struct draw_context *draw )
|
|
{
|
|
struct flat_stage *flatshade = CALLOC_STRUCT(flat_stage);
|
|
if (flatshade == NULL)
|
|
goto fail;
|
|
|
|
flatshade->stage.draw = draw;
|
|
flatshade->stage.name = "flatshade";
|
|
flatshade->stage.next = NULL;
|
|
flatshade->stage.point = draw_pipe_passthrough_point;
|
|
flatshade->stage.line = flatshade_first_line;
|
|
flatshade->stage.tri = flatshade_first_tri;
|
|
flatshade->stage.flush = flatshade_flush;
|
|
flatshade->stage.reset_stipple_counter = flatshade_reset_stipple_counter;
|
|
flatshade->stage.destroy = flatshade_destroy;
|
|
|
|
if (!draw_alloc_temp_verts( &flatshade->stage, 2 ))
|
|
goto fail;
|
|
|
|
return &flatshade->stage;
|
|
|
|
fail:
|
|
if (flatshade)
|
|
flatshade->stage.destroy( &flatshade->stage );
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|