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/**************************************************************************
*
* 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>
* Brian Paul
*/
#include "main/imports.h"
#include "program/prog_parameter.h"
#include "program/prog_print.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "util/u_inlines.h"
#include "st_debug.h"
#include "st_context.h"
#include "st_atom.h"
#include "st_atom_constbuf.h"
#include "st_program.h"
/**
* Pass the given program parameters to the graphics pipe as a
* constant buffer.
* \param shader_type either PIPE_SHADER_VERTEX or PIPE_SHADER_FRAGMENT
*/
void st_upload_constants( struct st_context *st,
struct gl_program_parameter_list *params,
unsigned shader_type)
{
struct pipe_context *pipe = st->pipe;
assert(shader_type == PIPE_SHADER_VERTEX ||
shader_type == PIPE_SHADER_FRAGMENT ||
shader_type == PIPE_SHADER_GEOMETRY);
/* update constants */
if (params && params->NumParameters) {
struct pipe_resource *cbuf;
const uint paramBytes = params->NumParameters * sizeof(GLfloat) * 4;
/* Update the constants which come from fixed-function state, such as
* transformation matrices, fog factors, etc. The rest of the values in
* the parameters list are explicitly set by the user with glUniform,
* glProgramParameter(), etc.
*/
_mesa_load_state_parameters(st->ctx, params);
/* We always need to get a new buffer, to keep the drivers simple and
* avoid gratuitous rendering synchronization.
* Let's use a user buffer to avoid an unnecessary copy.
*/
cbuf = pipe_user_buffer_create(pipe->screen,
params->ParameterValues,
paramBytes,
PIPE_BIND_CONSTANT_BUFFER);
if (ST_DEBUG & DEBUG_CONSTANTS) {
debug_printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n",
__FUNCTION__, shader_type, params->NumParameters,
params->StateFlags);
_mesa_print_parameter_list(params);
}
st->pipe->set_constant_buffer(st->pipe, shader_type, 0, cbuf);
pipe_resource_reference(&cbuf, NULL);
st->state.constants[shader_type].ptr = params->ParameterValues;
st->state.constants[shader_type].size = paramBytes;
}
else if (st->state.constants[shader_type].ptr) {
st->state.constants[shader_type].ptr = NULL;
st->state.constants[shader_type].size = 0;
st->pipe->set_constant_buffer(st->pipe, shader_type, 0, NULL);
}
}
/**
* Vertex shader:
*/
static void update_vs_constants(struct st_context *st )
{
struct st_vertex_program *vp = st->vp;
struct gl_program_parameter_list *params = vp->Base.Base.Parameters;
st_upload_constants( st, params, PIPE_SHADER_VERTEX );
}
const struct st_tracked_state st_update_vs_constants = {
"st_update_vs_constants", /* name */
{ /* dirty */
(_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS), /* mesa */
ST_NEW_VERTEX_PROGRAM, /* st */
},
update_vs_constants /* update */
};
/**
* Fragment shader:
*/
static void update_fs_constants(struct st_context *st )
{
struct st_fragment_program *fp = st->fp;
struct gl_program_parameter_list *params = fp->Base.Base.Parameters;
st_upload_constants( st, params, PIPE_SHADER_FRAGMENT );
}
const struct st_tracked_state st_update_fs_constants = {
"st_update_fs_constants", /* name */
{ /* dirty */
(_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS), /* mesa */
ST_NEW_FRAGMENT_PROGRAM, /* st */
},
update_fs_constants /* update */
};
/* Geometry shader:
*/
static void update_gs_constants(struct st_context *st )
{
struct st_geometry_program *gp = st->gp;
struct gl_program_parameter_list *params;
if (gp) {
params = gp->Base.Base.Parameters;
st_upload_constants( st, params, PIPE_SHADER_GEOMETRY );
}
}
const struct st_tracked_state st_update_gs_constants = {
"st_update_gs_constants", /* name */
{ /* dirty */
(_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS), /* mesa */
ST_NEW_GEOMETRY_PROGRAM, /* st */
},
update_gs_constants /* update */
};
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