diff options
Diffstat (limited to 'src/gallium/drivers/softpipe/sp_fs_exec.c')
| -rw-r--r-- | src/gallium/drivers/softpipe/sp_fs_exec.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_fs_exec.c b/src/gallium/drivers/softpipe/sp_fs_exec.c new file mode 100644 index 0000000000..4fea71c314 --- /dev/null +++ b/src/gallium/drivers/softpipe/sp_fs_exec.c @@ -0,0 +1,169 @@ +/************************************************************************** + * + * 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. + * + **************************************************************************/ + + +#include "sp_context.h" +#include "sp_state.h" +#include "sp_fs.h" +#include "sp_headers.h" + + +#include "pipe/p_state.h" +#include "pipe/p_defines.h" +#include "util/u_memory.h" +#include "pipe/p_inlines.h" +#include "tgsi/tgsi_exec.h" +#include "tgsi/tgsi_parse.h" + +struct sp_exec_fragment_shader +{ + struct sp_fragment_shader base; + const struct tgsi_token *machine_tokens; +}; + + +/** cast wrapper */ +static INLINE struct sp_exec_fragment_shader * +sp_exec_fragment_shader(const struct sp_fragment_shader *base) +{ + return (struct sp_exec_fragment_shader *) base; +} + + +/** + * Compute quad X,Y,Z,W for the four fragments in a quad. + * + * This should really be part of the compiled shader. + */ +void +sp_setup_pos_vector(const struct tgsi_interp_coef *coef, + float x, float y, + struct tgsi_exec_vector *quadpos) +{ + uint chan; + /* do X */ + quadpos->xyzw[0].f[0] = x; + quadpos->xyzw[0].f[1] = x + 1; + quadpos->xyzw[0].f[2] = x; + quadpos->xyzw[0].f[3] = x + 1; + + /* do Y */ + quadpos->xyzw[1].f[0] = y; + quadpos->xyzw[1].f[1] = y; + quadpos->xyzw[1].f[2] = y + 1; + quadpos->xyzw[1].f[3] = y + 1; + + /* do Z and W for all fragments in the quad */ + for (chan = 2; chan < 4; chan++) { + const float dadx = coef->dadx[chan]; + const float dady = coef->dady[chan]; + const float a0 = coef->a0[chan] + dadx * x + dady * y; + quadpos->xyzw[chan].f[0] = a0; + quadpos->xyzw[chan].f[1] = a0 + dadx; + quadpos->xyzw[chan].f[2] = a0 + dady; + quadpos->xyzw[chan].f[3] = a0 + dadx + dady; + } +} + + +static void +exec_prepare( const struct sp_fragment_shader *base, + struct tgsi_exec_machine *machine, + struct tgsi_sampler *samplers ) +{ + struct sp_exec_fragment_shader *spefs = + sp_exec_fragment_shader(base); + + /* + * Bind tokens/shader to the interpreter's machine state. + * Avoid redundant binding. + */ + if (spefs->machine_tokens != base->shader.tokens) { + tgsi_exec_machine_bind_shader( machine, + base->shader.tokens, + PIPE_MAX_SAMPLERS, + samplers ); + spefs->machine_tokens = base->shader.tokens; + } +} + + + + +/* TODO: hide the machine struct in here somewhere, remove from this + * interface: + */ +static unsigned +exec_run( const struct sp_fragment_shader *base, + struct tgsi_exec_machine *machine, + struct quad_header *quad ) +{ + + /* Compute X, Y, Z, W vals for this quad */ + sp_setup_pos_vector(quad->posCoef, + (float)quad->input.x0, (float)quad->input.y0, + &machine->QuadPos); + + return tgsi_exec_machine_run( machine ); +} + + + +static void +exec_delete( struct sp_fragment_shader *base ) +{ + FREE((void *) base->shader.tokens); + FREE(base); +} + + + + + +struct sp_fragment_shader * +softpipe_create_fs_exec(struct softpipe_context *softpipe, + const struct pipe_shader_state *templ) +{ + struct sp_exec_fragment_shader *shader; + + /* Decide whether we'll be codegenerating this shader and if so do + * that now. + */ + + shader = CALLOC_STRUCT(sp_exec_fragment_shader); + if (!shader) + return NULL; + + /* we need to keep a local copy of the tokens */ + shader->base.shader.tokens = tgsi_dup_tokens(templ->tokens); + shader->base.prepare = exec_prepare; + shader->base.run = exec_run; + shader->base.delete = exec_delete; + + return &shader->base; +} + |