/**********************************************************
* 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 "svga_screen.h"
#include "svga_context.h"
#include "svga_state.h"
#include "svga_cmd.h"
#include "svga_tgsi.h"
#include "svga_debug.h"
#include "svga_hw_reg.h"
/*
* Don't try to send more than 4kb of successive constants.
*/
#define MAX_CONST_REG_COUNT 256 /**< number of float[4] constants */
/**
* Convert from PIPE_SHADER_* to SVGA3D_SHADERTYPE_*
*/
static int
svga_shader_type(unsigned shader)
{
assert(PIPE_SHADER_VERTEX + 1 == SVGA3D_SHADERTYPE_VS);
assert(PIPE_SHADER_FRAGMENT + 1 == SVGA3D_SHADERTYPE_PS);
assert(shader <= PIPE_SHADER_FRAGMENT);
return shader + 1;
}
/**
* Check and emit one shader constant register.
* \param shader PIPE_SHADER_FRAGMENT or PIPE_SHADER_VERTEX
* \param i which float[4] constant to change
* \param value the new float[4] value
*/
static enum pipe_error
emit_const(struct svga_context *svga, unsigned shader, unsigned i,
const float *value)
{
enum pipe_error ret = PIPE_OK;
assert(shader < PIPE_SHADER_TYPES);
assert(i < SVGA3D_CONSTREG_MAX);
if (memcmp(svga->state.hw_draw.cb[shader][i], value,
4 * sizeof(float)) != 0) {
if (SVGA_DEBUG & DEBUG_CONSTS)
debug_printf("%s %s %u: %f %f %f %f\n",
__FUNCTION__,
shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
i,
value[0],
value[1],
value[2],
value[3]);
ret = SVGA3D_SetShaderConst( svga->swc,
i,
svga_shader_type(shader),
SVGA3D_CONST_TYPE_FLOAT,
value );
if (ret != PIPE_OK)
return ret;
memcpy(svga->state.hw_draw.cb[shader][i], value, 4 * sizeof(float));
}
return ret;
}
/*
* Check and emit a range of shader constant registers, trying to coalesce
* successive shader constant updates in a single command in order to save
* space on the command buffer. This is a HWv8 feature.
*/
static enum pipe_error
emit_const_range(struct svga_context *svga,
unsigned shader,
unsigned offset,
unsigned count,
const float (*values)[4])
{
unsigned i, j;
enum pipe_error ret;
#ifdef DEBUG
if (offset + count > SVGA3D_CONSTREG_MAX) {
debug_printf("svga: too many constants (offset + count = %u)\n",
offset + count);
}
#endif
if (offset > SVGA3D_CONSTREG_MAX) {
/* This isn't OK, but if we propagate an error all the way up we'll
* just get into more trouble.
* XXX note that offset is always zero at this time so this is moot.
*/
return PIPE_OK;
}
if (offset + count > SVGA3D_CONSTREG_MAX) {
/* Just drop the extra constants for now.
* Ideally we should not have allowed the app to create a shader
* that exceeds our constant buffer size but there's no way to
* express that in gallium at this time.
*/
count = SVGA3D_CONSTREG_MAX - offset;
}
i = 0;
while (i < count) {
if (memcmp(svga->state.hw_draw.cb[shader][offset + i],
values[i],
4 * sizeof(float)) != 0) {
/* Found one dirty constant
*/
if (SVGA_DEBUG & DEBUG_CONSTS)
debug_printf("%s %s %d: %f %f %f %f\n",
__FUNCTION__,
shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
offset + i,
values[i][0],
values[i][1],
values[i][2],
values[i][3]);
/* Look for more consecutive dirty constants.
*/
j = i + 1;
while (j < count &&
j < i + MAX_CONST_REG_COUNT &&
memcmp(svga->state.hw_draw.cb[shader][offset + j],
values[j],
4 * sizeof(float)) != 0) {
if (SVGA_DEBUG & DEBUG_CONSTS)
debug_printf("%s %s %d: %f %f %f %f\n",
__FUNCTION__,
shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG",
offset + j,
values[j][0],
values[j][1],
values[j][2],
values[j][3]);
++j;
}
assert(j >= i + 1);
/* Send them all together.
*/
ret = SVGA3D_SetShaderConsts(svga->swc,
offset + i, j - i,
svga_shader_type(shader),
SVGA3D_CONST_TYPE_FLOAT,
values + i);
if (ret != PIPE_OK) {
return ret;
}
/*
* Local copy of the hardware state.
*/
memcpy(svga->state.hw_draw.cb[shader][offset + i],
values[i],
(j - i) * 4 * sizeof(float));
i = j + 1;
} else {
++i;
}
}
return PIPE_OK;
}
/**
* Emit all the constants in a constant buffer for a shader stage.
*/
static enum pipe_error
emit_consts(struct svga_context *svga, unsigned shader)
{
struct svga_screen *ss = svga_screen(svga->pipe.screen);
struct pipe_transfer *transfer = NULL;
unsigned count;
const float (*data)[4] = NULL;
unsigned i;
enum pipe_error ret = PIPE_OK;
const unsigned offset = 0;
assert(shader < PIPE_SHADER_TYPES);
if (svga->curr.cb[shader] == NULL)
goto done;
count = svga->curr.cb[shader]->width0 / (4 * sizeof(float));
data = (const float (*)[4])pipe_buffer_map(&svga->pipe,
svga->curr.cb[shader],
PIPE_TRANSFER_READ,
&transfer);
if (data == NULL) {
ret = PIPE_ERROR_OUT_OF_MEMORY;
goto done;
}
if (ss->hw_version >= SVGA3D_HWVERSION_WS8_B1) {
ret = emit_const_range( svga, shader, offset, count, data );
if (ret != PIPE_OK) {
goto done;
}
} else {
for (i = 0; i < count; i++) {
ret = emit_const( svga, shader, offset + i, data[i] );
if (ret != PIPE_OK) {
goto done;
}
}
}
done:
if (data)
pipe_buffer_unmap(&svga->pipe, transfer);
return ret;
}
static enum pipe_error
emit_fs_consts(struct svga_context *svga, unsigned dirty)
{
const struct svga_shader_result *result = svga->state.hw_draw.fs;
enum pipe_error ret = PIPE_OK;
ret = emit_consts( svga, PIPE_SHADER_FRAGMENT );
if (ret != PIPE_OK)
return ret;
/* The internally generated fragment shader for xor blending
* doesn't have a 'result' struct. It should be fixed to avoid
* this special case, but work around it with a NULL check:
*/
if (result) {
const struct svga_fs_compile_key *key = &result->key.fkey;
if (key->num_unnormalized_coords) {
const unsigned offset =
result->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
unsigned i;
for (i = 0; i < key->num_textures; i++) {
if (key->tex[i].unnormalized) {
struct pipe_resource *tex = svga->curr.sampler_views[i]->texture;
float data[4];
data[0] = 1.0f / (float) tex->width0;
data[1] = 1.0f / (float) tex->height0;
data[2] = 1.0f;
data[3] = 1.0f;
ret = emit_const(svga,
PIPE_SHADER_FRAGMENT,
key->tex[i].width_height_idx + offset,
data);
if (ret != PIPE_OK) {
return ret;
}
}
}
}
}
return PIPE_OK;
}
struct svga_tracked_state svga_hw_fs_constants =
{
"hw fs params",
(SVGA_NEW_FS_CONST_BUFFER |
SVGA_NEW_FS_RESULT |
SVGA_NEW_TEXTURE_BINDING),
emit_fs_consts
};
static enum pipe_error
emit_vs_consts(struct svga_context *svga, unsigned dirty)
{
const struct svga_shader_result *result = svga->state.hw_draw.vs;
const struct svga_vs_compile_key *key;
enum pipe_error ret = PIPE_OK;
unsigned offset;
/* SVGA_NEW_VS_RESULT
*/
if (result == NULL)
return PIPE_OK;
key = &result->key.vkey;
/* SVGA_NEW_VS_CONST_BUFFER
*/
ret = emit_consts( svga, PIPE_SHADER_VERTEX );
if (ret != PIPE_OK)
return ret;
/* offset = number of constants in the VS const buffer */
offset = result->shader->info.file_max[TGSI_FILE_CONSTANT] + 1;
/* SVGA_NEW_VS_PRESCALE
* Put the viewport pre-scale/translate values into the const buffer.
*/
if (key->need_prescale) {
ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
svga->state.hw_clear.prescale.scale );
if (ret != PIPE_OK)
return ret;
ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++,
svga->state.hw_clear.prescale.translate );
if (ret != PIPE_OK)
return ret;
}
return PIPE_OK;
}
struct svga_tracked_state svga_hw_vs_constants =
{
"hw vs params",
(SVGA_NEW_PRESCALE |
SVGA_NEW_VS_CONST_BUFFER |
SVGA_NEW_VS_RESULT),
emit_vs_consts
};