diff options
Diffstat (limited to 'src/mesa/state_tracker/st_atom_constbuf.c')
| -rw-r--r-- | src/mesa/state_tracker/st_atom_constbuf.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_constbuf.c b/src/mesa/state_tracker/st_atom_constbuf.c new file mode 100644 index 0000000000..514b10cd02 --- /dev/null +++ b/src/mesa/state_tracker/st_atom_constbuf.c @@ -0,0 +1,140 @@ +/************************************************************************** + * + * 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 "shader/prog_parameter.h" +#include "shader/prog_print.h" + +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "pipe/p_inlines.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 id either PIPE_SHADER_VERTEX or PIPE_SHADER_FRAGMENT + */ +void st_upload_constants( struct st_context *st, + struct gl_program_parameter_list *params, + unsigned id) +{ + struct pipe_context *pipe = st->pipe; + struct pipe_constant_buffer *cbuf = &st->state.constants[id]; + + assert(id == PIPE_SHADER_VERTEX || id == PIPE_SHADER_FRAGMENT); + + /* update constants */ + if (params && params->NumParameters) { + const uint paramBytes = params->NumParameters * sizeof(GLfloat) * 4; + + /* Update our own dependency flags. This works because this + * function will also be called whenever the program changes. + */ + st->constants.tracked_state[id].dirty.mesa = + (params->StateFlags | _NEW_PROGRAM); + + _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. + */ + pipe_buffer_reference(pipe->screen, &cbuf->buffer, NULL ); + cbuf->buffer = pipe_buffer_create(pipe->screen, 16, PIPE_BUFFER_USAGE_CONSTANT, + paramBytes ); + + if (0) + { + printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n", + __FUNCTION__, id, params->NumParameters, params->StateFlags); + _mesa_print_parameter_list(params); + } + + /* load Mesa constants into the constant buffer */ + if (cbuf->buffer) { + void *map = pipe_buffer_map(pipe->screen, cbuf->buffer, + PIPE_BUFFER_USAGE_CPU_WRITE); + memcpy(map, params->ParameterValues, paramBytes); + pipe_buffer_unmap(pipe->screen, cbuf->buffer); + } + + st->pipe->set_constant_buffer(st->pipe, id, 0, cbuf); + } + else { + st->constants.tracked_state[id].dirty.mesa = 0; + // st->pipe->set_constant_buffer(st->pipe, id, 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 */ + 0, /* set dynamically above */ /* 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 */ + 0, /* set dynamically above */ /* mesa */ + ST_NEW_FRAGMENT_PROGRAM, /* st */ + }, + update_fs_constants /* update */ +}; + |