/**********************************************************
* 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_math.h"
#include "util/u_memory.h"
#include "util/u_bitmask.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_fs_keys( const struct svga_fs_compile_key *a,
const struct svga_fs_compile_key *b )
{
unsigned keysize_a = svga_fs_key_size( a );
unsigned keysize_b = svga_fs_key_size( b );
if (keysize_a != keysize_b) {
return (int)(keysize_a - keysize_b);
}
return memcmp( a
, b
, keysize_a
); }
static struct svga_shader_result *search_fs_key( struct svga_fragment_shader *fs,
const struct svga_fs_compile_key *key )
{
struct svga_shader_result *result = fs->base.results;
for ( ; result; result = result->next) {
if (compare_fs_keys( key, &result->key.fkey ) == 0)
return result;
}
return NULL;
}
/**
* If we fail to compile a fragment shader (because it uses too many
* registers, for example) we'll use a dummy/fallback shader that
* simply emits a constant color.
*/
static const struct tgsi_token *
get_dummy_fragment_shader(void)
{
static const float red[4] = { 1.0, 0.0, 0.0, 0.0 };
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_FRAGMENT);
if (!ureg)
return NULL;
dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, 0);
src = ureg_DECL_immediate(ureg, red, 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_fs( struct svga_context *svga,
struct svga_fragment_shader *fs,
const struct svga_fs_compile_key *key,
struct svga_shader_result **out_result )
{
struct svga_shader_result *result;
enum pipe_error ret = PIPE_ERROR;
result = svga_translate_fragment_program( fs, key );
if (result == NULL) {
/* some problem during translation, try the dummy shader */
const struct tgsi_token *dummy = get_dummy_fragment_shader();
if (!dummy) {
ret = PIPE_ERROR_OUT_OF_MEMORY;
goto fail;
}
debug_printf("Failed to compile fragment shader, using dummy shader instead.\n");
FREE((void *) fs->base.tokens);
fs->base.tokens = dummy;
result = svga_translate_fragment_program(fs, key);
if (result == NULL) {
ret = PIPE_ERROR;
goto fail;
}
}
result->id = util_bitmask_add(svga->fs_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_PS,
result->tokens,
result->nr_tokens * sizeof result->tokens[0]);
if (ret != PIPE_OK)
goto fail;
*out_result = result;
result->next = fs->base.results;
fs->base.results = result;
return PIPE_OK;
fail:
if (result) {
if (result->id != UTIL_BITMASK_INVALID_INDEX)
util_bitmask_clear( svga->fs_bm, result->id );
svga_destroy_shader_result( result );
}
return ret;
}
/* SVGA_NEW_TEXTURE_BINDING
* SVGA_NEW_RAST
* SVGA_NEW_NEED_SWTNL
* SVGA_NEW_SAMPLER
*/
static enum pipe_error
make_fs_key(const struct svga_context *svga,
struct svga_fragment_shader *fs,
struct svga_fs_compile_key *key)
{
unsigned i;
int idx = 0;
/* Only need fragment shader fixup for twoside lighting if doing
* hwtnl. Otherwise the draw module does the whole job for us.
*
* SVGA_NEW_SWTNL
*/
if (!svga->state.sw.need_swtnl) {
/* SVGA_NEW_RAST
*/
key->light_twoside = svga->curr.rast->templ.light_twoside;
key->front_ccw = svga->curr.rast->templ.front_ccw;
}
/* The blend workaround for simulating logicop xor behaviour
* requires that the incoming fragment color be white. This change
* achieves that by creating a variant of the current fragment
* shader that overrides all output colors with 1,1,1,1
*
* This will work for most shaders, including those containing
* TEXKIL and/or depth-write. However, it will break on the
* combination of xor-logicop plus alphatest.
*
* Ultimately, we could implement alphatest in the shader using
* texkil prior to overriding the outgoing fragment color.
*
* SVGA_NEW_BLEND
*/
if (svga->curr.blend->need_white_fragments) {
key->white_fragments = 1;
}
/* XXX: want to limit this to the textures that the shader actually
* refers to.
*
* SVGA_NEW_TEXTURE_BINDING | SVGA_NEW_SAMPLER
*/
for (i = 0; i < svga->curr.num_sampler_views; i++) {
if (svga->curr.sampler_views[i]) {
assert(svga
->curr.
sampler[i
]); assert(svga
->curr.
sampler_views[i
]->texture
); key->tex[i].texture_target = svga->curr.sampler_views[i]->texture->target;
if (!svga->curr.sampler[i]->normalized_coords) {
key->tex[i].width_height_idx = idx++;
key->tex[i].unnormalized = TRUE;
++key->num_unnormalized_coords;
}
key->tex[i].swizzle_r = svga->curr.sampler_views[i]->swizzle_r;
key->tex[i].swizzle_g = svga->curr.sampler_views[i]->swizzle_g;
key->tex[i].swizzle_b = svga->curr.sampler_views[i]->swizzle_b;
key->tex[i].swizzle_a = svga->curr.sampler_views[i]->swizzle_a;
}
}
key->num_textures = svga->curr.num_sampler_views;
idx = 0;
for (i = 0; i < svga->curr.num_samplers; ++i) {
if (svga->curr.sampler[i]) {
key->tex[i].compare_mode = svga->curr.sampler[i]->compare_mode;
key->tex[i].compare_func = svga->curr.sampler[i]->compare_func;
}
}
/* sprite coord gen state */
for (i = 0; i < svga->curr.num_samplers; ++i) {
key->tex[i].sprite_texgen =
svga->curr.rast->templ.sprite_coord_enable & (1 << i);
}
key->sprite_origin_lower_left = (svga->curr.rast->templ.sprite_coord_mode
== PIPE_SPRITE_COORD_LOWER_LEFT);
return PIPE_OK;
}
static enum pipe_error
emit_hw_fs(struct svga_context *svga, unsigned dirty)
{
struct svga_shader_result *result = NULL;
unsigned id = SVGA3D_INVALID_ID;
enum pipe_error ret = PIPE_OK;
struct svga_fragment_shader *fs = svga->curr.fs;
struct svga_fs_compile_key key;
/* SVGA_NEW_BLEND
* SVGA_NEW_TEXTURE_BINDING
* SVGA_NEW_RAST
* SVGA_NEW_NEED_SWTNL
* SVGA_NEW_SAMPLER
*/
ret = make_fs_key( svga, fs, &key );
if (ret != PIPE_OK)
return ret;
result = search_fs_key( fs, &key );
if (!result) {
ret = compile_fs( svga, fs, &key, &result );
if (ret != PIPE_OK)
return ret;
}
id = result->id;
assert(id
!= SVGA3D_INVALID_ID
);
if (result != svga->state.hw_draw.fs) {
ret = SVGA3D_SetShader(svga->swc,
SVGA3D_SHADERTYPE_PS,
id );
if (ret != PIPE_OK)
return ret;
svga->dirty |= SVGA_NEW_FS_RESULT;
svga->state.hw_draw.fs = result;
}
return PIPE_OK;
}
struct svga_tracked_state svga_hw_fs =
{
"fragment shader (hwtnl)",
(SVGA_NEW_FS |
SVGA_NEW_TEXTURE_BINDING |
SVGA_NEW_NEED_SWTNL |
SVGA_NEW_RAST |
SVGA_NEW_SAMPLER |
SVGA_NEW_BLEND),
emit_hw_fs
};