/**********************************************************
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* Copyright 2008-2012 VMware, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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**********************************************************/
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#ifndef SVGA_SHADER_H
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#define SVGA_SHADER_H
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#include "svga3d_reg.h"
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#include "svga_context.h"
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#include "svga_streamout.h"
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/**
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* We use a 64-bit mask to keep track of the generic indexes.
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* This is the maximum semantic index for a TGSI GENERIC[i] register.
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*/
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#define MAX_GENERIC_VARYING 64
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struct svga_context;
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struct svga_compile_key
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{
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/* vertex shader only */
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struct {
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uint64_t fs_generic_inputs;
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unsigned passthrough:1;
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unsigned need_prescale:1;
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unsigned undo_viewport:1;
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unsigned allow_psiz:1;
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/** The following are all 32-bit bitmasks (per VS input) */
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unsigned adjust_attrib_range;
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unsigned attrib_is_pure_int;
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unsigned adjust_attrib_w_1;
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unsigned adjust_attrib_itof;
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unsigned adjust_attrib_utof;
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unsigned attrib_is_bgra;
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unsigned attrib_puint_to_snorm;
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unsigned attrib_puint_to_uscaled;
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unsigned attrib_puint_to_sscaled;
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} vs;
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/* geometry shader only */
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struct {
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uint64_t vs_generic_outputs;
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unsigned need_prescale:1;
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unsigned writes_psize:1;
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unsigned wide_point:1;
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} gs;
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/* fragment shader only */
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struct {
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uint64_t vs_generic_outputs;
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uint64_t gs_generic_outputs;
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unsigned light_twoside:1;
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unsigned front_ccw:1;
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unsigned white_fragments:1;
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unsigned alpha_to_one:1;
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unsigned flatshade:1;
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unsigned pstipple:1;
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unsigned alpha_func:4; /**< SVGA3D_CMP_x */
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unsigned write_color0_to_n_cbufs:4;
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unsigned aa_point:1;
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int aa_point_coord_index;
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float alpha_ref;
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} fs;
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/* any shader type */
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int8_t generic_remap_table[MAX_GENERIC_VARYING];
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unsigned num_textures:8;
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unsigned num_unnormalized_coords:8;
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unsigned clip_plane_enable:PIPE_MAX_CLIP_PLANES;
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unsigned sprite_origin_lower_left:1;
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unsigned sprite_coord_enable;
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struct {
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unsigned compare_mode:1;
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unsigned compare_func:3;
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unsigned unnormalized:1;
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unsigned texel_bias:1;
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unsigned width_height_idx:5; /**< texture unit */
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unsigned is_array:1;
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unsigned sprite_texgen:1;
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unsigned swizzle_r:3;
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unsigned swizzle_g:3;
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unsigned swizzle_b:3;
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unsigned swizzle_a:3;
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} tex[PIPE_MAX_SAMPLERS];
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/* Note: svga_compile_keys_equal() depends on the variable-size
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* tex[] array being at the end of this structure.
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*/
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};
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/* A key for a variant of token string of a shader */
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struct svga_token_key {
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struct {
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unsigned sprite_coord_enable:24;
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unsigned sprite_origin_upper_left:1;
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unsigned point_pos_stream_out:1;
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unsigned writes_psize:1;
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unsigned aa_point:1;
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} gs;
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};
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/**
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* A single TGSI shader may be compiled into different variants of
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* SVGA3D shaders depending on the compile key. Each user shader
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* will have a linked list of these variants.
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*/
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struct svga_shader_variant
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{
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const struct svga_shader *shader;
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/** Parameters used to generate this variant */
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struct svga_compile_key key;
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/* Compiled shader tokens:
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*/
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const unsigned *tokens;
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unsigned nr_tokens;
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/** Per-context shader identifier used with SVGA_3D_CMD_SHADER_DEFINE,
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* SVGA_3D_CMD_SET_SHADER and SVGA_3D_CMD_SHADER_DESTROY.
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*/
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unsigned id;
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/** Start of extra constants (number of float[4] constants) */
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unsigned extra_const_start;
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/* GB object buffer containing the bytecode */
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struct svga_winsys_gb_shader *gb_shader;
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boolean uses_flat_interp; /** TRUE if flat interpolation qualifier is
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* applied to any of the varyings.
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*/
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/** Is the color output just a constant value? (fragment shader only) */
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boolean constant_color_output;
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/** Bitmask indicating which texture units are doing the shadow
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* comparison test in the shader rather than the sampler state.
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*/
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unsigned fs_shadow_compare_units;
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/** For FS-based polygon stipple */
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unsigned pstipple_sampler_unit;
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/** Next variant */
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struct svga_shader_variant *next;
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};
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struct svga_shader
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{
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const struct tgsi_token *tokens;
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struct svga_token_key token_key; /* token key for the token string */
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struct tgsi_shader_info info;
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/* List of shaders with tokens derived from the same token string */
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struct svga_shader *next;
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struct svga_shader *parent; /* shader with the original token string */
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struct svga_stream_output *stream_output;
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/** Head of linked list of compiled variants */
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struct svga_shader_variant *variants;
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unsigned id; /**< for debugging only */
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};
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struct svga_fragment_shader
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{
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struct svga_shader base;
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struct draw_fragment_shader *draw_shader;
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/** Mask of which generic varying variables are read by this shader */
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uint64_t generic_inputs;
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/** Table mapping original TGSI generic indexes to low integers */
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int8_t generic_remap_table[MAX_GENERIC_VARYING];
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};
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struct svga_vertex_shader
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{
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struct svga_shader base;
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struct draw_vertex_shader *draw_shader;
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/** Mask of which generic varying variables are written by this shader */
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uint64_t generic_outputs;
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/** Generated geometry shader that goes with this vertex shader */
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struct svga_geometry_shader *gs;
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};
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struct svga_geometry_shader
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{
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struct svga_shader base;
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struct draw_geometry_shader *draw_shader;
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/** Table mapping original TGSI generic indexes to low integers */
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int8_t generic_remap_table[MAX_GENERIC_VARYING];
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uint64_t generic_outputs;
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unsigned aa_point_coord_index; /* generic index for aa point coord */
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unsigned wide_point:1; /* set if the shader emulates wide point */
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};
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static inline boolean
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svga_compile_keys_equal(const struct svga_compile_key *a,
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const struct svga_compile_key *b)
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{
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unsigned key_size =
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(const char *) &a->tex[a->num_textures] - (const char *) a;
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return memcmp(a, b, key_size) == 0;
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}
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uint64_t
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svga_get_generic_inputs_mask(const struct tgsi_shader_info *info);
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uint64_t
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svga_get_generic_outputs_mask(const struct tgsi_shader_info *info);
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void
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svga_remap_generics(uint64_t generics_mask,
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int8_t remap_table[MAX_GENERIC_VARYING]);
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int
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svga_remap_generic_index(int8_t remap_table[MAX_GENERIC_VARYING],
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int generic_index);
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void
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svga_init_shader_key_common(const struct svga_context *svga,
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enum pipe_shader_type shader,
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struct svga_compile_key *key);
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struct svga_shader_variant *
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svga_search_shader_key(const struct svga_shader *shader,
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const struct svga_compile_key *key);
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struct svga_shader *
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svga_search_shader_token_key(struct svga_shader *shader,
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const struct svga_token_key *key);
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enum pipe_error
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svga_define_shader(struct svga_context *svga,
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SVGA3dShaderType type,
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struct svga_shader_variant *variant);
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enum pipe_error
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svga_set_shader(struct svga_context *svga,
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SVGA3dShaderType type,
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struct svga_shader_variant *variant);
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struct svga_shader_variant *
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svga_new_shader_variant(struct svga_context *svga);
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enum pipe_error
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svga_destroy_shader_variant(struct svga_context *svga,
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SVGA3dShaderType type,
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struct svga_shader_variant *variant);
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enum pipe_error
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svga_rebind_shaders(struct svga_context *svga);
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/**
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* Check if a shader's bytecode exceeds the device limits.
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*/
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static inline boolean
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svga_shader_too_large(const struct svga_context *svga,
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const struct svga_shader_variant *variant)
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{
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if (svga_have_gb_objects(svga)) {
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return FALSE;
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}
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if (variant->nr_tokens * sizeof(variant->tokens[0])
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+ sizeof(SVGA3dCmdDefineShader) + sizeof(SVGA3dCmdHeader)
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< SVGA_CB_MAX_COMMAND_SIZE) {
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Convert from PIPE_SHADER_* to SVGA3D_SHADERTYPE_*
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*/
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static inline SVGA3dShaderType
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svga_shader_type(enum pipe_shader_type shader)
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{
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switch (shader) {
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case PIPE_SHADER_VERTEX:
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return SVGA3D_SHADERTYPE_VS;
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case PIPE_SHADER_GEOMETRY:
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return SVGA3D_SHADERTYPE_GS;
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case PIPE_SHADER_FRAGMENT:
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return SVGA3D_SHADERTYPE_PS;
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default:
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assert(!"Invalid shader type");
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return SVGA3D_SHADERTYPE_VS;
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}
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}
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/** Does the current VS have stream output? */
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static inline boolean
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svga_have_vs_streamout(const struct svga_context *svga)
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{
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return svga->curr.vs != NULL && svga->curr.vs->base.stream_output != NULL;
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}
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/** Does the current GS have stream output? */
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static inline boolean
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svga_have_gs_streamout(const struct svga_context *svga)
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{
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return svga->curr.gs != NULL && svga->curr.gs->base.stream_output != NULL;
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}
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#endif /* SVGA_SHADER_H */
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