/**********************************************************
* Copyright 2008-2009 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, 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 "util/u_inlines.h"
#include "pipe/p_defines.h"
#include "util/u_format.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "util/u_bitmask.h"
#include "translate/translate.h"
#include "tgsi/tgsi_ureg.h"
#include "svga_context.h"
#include "svga_state.h"
#include "svga_cmd.h"
#include "svga_tgsi.h"
#include "svga_hw_reg.h"
/***********************************************************************
*/
static INLINE int compare_vs_keys( const struct svga_vs_compile_key *a,
const struct svga_vs_compile_key *b )
{
unsigned keysize = svga_vs_key_size( a );
return memcmp( a
, b
, keysize
); }
static struct svga_shader_result *search_vs_key( struct svga_vertex_shader *vs,
const struct svga_vs_compile_key *key )
{
struct svga_shader_result *result = vs->base.results;
for ( ; result; result = result->next) {
if (compare_vs_keys( key, &result->key.vkey ) == 0)
return result;
}
return NULL;
}
/**
* If we fail to compile a vertex shader we'll use a dummy/fallback shader
* that simply emits a (0,0,0,1) vertex position.
*/
static const struct tgsi_token *
get_dummy_vertex_shader(void)
{
static const float zero[4] = { 0.0, 0.0, 0.0, 1.0 };
struct ureg_program *ureg;
const struct tgsi_token *tokens;
struct ureg_src src;
struct ureg_dst dst;
unsigned num_tokens;
ureg = ureg_create(TGSI_PROCESSOR_VERTEX);
if (!ureg)
return NULL;
dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
src = ureg_DECL_immediate(ureg, zero, 4);
ureg_MOV(ureg, dst, src);
ureg_END(ureg);
tokens = ureg_get_tokens(ureg, &num_tokens);
ureg_destroy(ureg);
return tokens;
}
static enum pipe_error compile_vs( struct svga_context *svga,
struct svga_vertex_shader *vs,
const struct svga_vs_compile_key *key,
struct svga_shader_result **out_result )
{
struct svga_shader_result *result;
enum pipe_error ret = PIPE_ERROR;
result = svga_translate_vertex_program( vs, key );
if (result == NULL) {
/* some problem during translation, try the dummy shader */
const struct tgsi_token *dummy = get_dummy_vertex_shader();
if (!dummy) {
ret = PIPE_ERROR_OUT_OF_MEMORY;
goto fail;
}
debug_printf("Failed to compile vertex shader, using dummy shader instead.\n");
FREE((void *) vs->base.tokens);
vs->base.tokens = dummy;
result = svga_translate_vertex_program(vs, key);
if (result == NULL) {
ret = PIPE_ERROR;
goto fail;
}
}
result->id = util_bitmask_add(svga->vs_bm);
if(result->id == UTIL_BITMASK_INVALID_INDEX) {
ret = PIPE_ERROR_OUT_OF_MEMORY;
goto fail;
}
ret = SVGA3D_DefineShader(svga->swc,
result->id,
SVGA3D_SHADERTYPE_VS,
result->tokens,
result->nr_tokens * sizeof result->tokens[0]);
if (ret != PIPE_OK)
goto fail;
*out_result = result;
result->next = vs->base.results;
vs->base.results = result;
return PIPE_OK;
fail:
if (result) {
if (result->id != UTIL_BITMASK_INVALID_INDEX)
util_bitmask_clear( svga->vs_bm, result->id );
svga_destroy_shader_result( result );
}
return ret;
}
/* SVGA_NEW_PRESCALE, SVGA_NEW_RAST, SVGA_NEW_FS
*/
static void
make_vs_key(struct svga_context *svga, struct svga_vs_compile_key *key)
{
key->need_prescale = svga->state.hw_clear.prescale.enabled;
key->allow_psiz = svga->curr.rast->templ.point_size_per_vertex;
/* SVGA_NEW_FS */
key->fs_generic_inputs = svga->curr.fs->generic_inputs;
}
static enum pipe_error
emit_hw_vs(struct svga_context *svga, unsigned dirty)
{
struct svga_shader_result *result = NULL;
unsigned id = SVGA3D_INVALID_ID;
enum pipe_error ret = PIPE_OK;
/* SVGA_NEW_NEED_SWTNL */
if (!svga->state.sw.need_swtnl) {
struct svga_vertex_shader *vs = svga->curr.vs;
struct svga_vs_compile_key key;
make_vs_key( svga, &key );
result = search_vs_key( vs, &key );
if (!result) {
ret = compile_vs( svga, vs, &key, &result );
if (ret != PIPE_OK)
return ret;
}
id = result->id;
}
if (result != svga->state.hw_draw.vs) {
ret = SVGA3D_SetShader(svga->swc,
SVGA3D_SHADERTYPE_VS,
id );
if (ret != PIPE_OK)
return ret;
svga->dirty |= SVGA_NEW_VS_RESULT;
svga->state.hw_draw.vs = result;
}
return PIPE_OK;
}
struct svga_tracked_state svga_hw_vs =
{
"vertex shader (hwtnl)",
(SVGA_NEW_VS |
SVGA_NEW_FS |
SVGA_NEW_PRESCALE |
SVGA_NEW_NEED_SWTNL),
emit_hw_vs
};