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mesa/src/compiler/glsl/builtin_variables.cpp
Vadym Shovkoplias 36c241be01 driconf, glsl: Add a vs_position_always_precise option 
This is basically the same workaround as in 9b577f2a88 (driconf, glsl: Add a
vs_position_always_invariant option) commit but for tesselation evaluation
shaders. Some applications do not mark outputs as precise in tesselation
evaluation shaders which can lead to different results in case some
optimizations were applied.

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Signed-off-by: Vadym Shovkoplias <vadym.shovkoplias@globallogic.com>
Fixes: 09705747d7 ("nir/algebraic: Reassociate fadd into fmul in DPH-like pattern")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13027>
2021-09-30 10:46:39 +00:00

1678 lines
64 KiB
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/*
* Copyright © 2010 Intel Corporation
*
* 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 (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 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.
*/
/**
* Building this file with MinGW g++ 7.3 or 7.4 with:
* scons platform=windows toolchain=crossmingw machine=x86 build=profile
* triggers an internal compiler error.
* Overriding the optimization level to -O1 works around the issue.
* MinGW 5.3.1 does not seem to have the bug, neither does 8.3. So for now
* we're simply testing for version 7.x here.
*/
#if defined(__MINGW32__) && __GNUC__ == 7
#warning "disabling optimizations for this file to work around compiler bug in MinGW gcc 7.x"
#pragma GCC optimize("O1")
#endif
#include "ir.h"
#include "ir_builder.h"
#include "linker.h"
#include "glsl_parser_extras.h"
#include "glsl_symbol_table.h"
#include "main/mtypes.h"
#include "main/uniforms.h"
#include "program/prog_statevars.h"
#include "program/prog_instruction.h"
#include "builtin_functions.h"
using namespace ir_builder;
static const struct gl_builtin_uniform_element gl_NumSamples_elements[] = {
{NULL, {STATE_NUM_SAMPLES, 0, 0}, SWIZZLE_XXXX}
};
static const struct gl_builtin_uniform_element gl_DepthRange_elements[] = {
{"near", {STATE_DEPTH_RANGE, 0, 0}, SWIZZLE_XXXX},
{"far", {STATE_DEPTH_RANGE, 0, 0}, SWIZZLE_YYYY},
{"diff", {STATE_DEPTH_RANGE, 0, 0}, SWIZZLE_ZZZZ},
};
static const struct gl_builtin_uniform_element gl_ClipPlane_elements[] = {
{NULL, {STATE_CLIPPLANE, 0, 0}, SWIZZLE_XYZW}
};
static const struct gl_builtin_uniform_element gl_Point_elements[] = {
{"size", {STATE_POINT_SIZE}, SWIZZLE_XXXX},
{"sizeMin", {STATE_POINT_SIZE}, SWIZZLE_YYYY},
{"sizeMax", {STATE_POINT_SIZE}, SWIZZLE_ZZZZ},
{"fadeThresholdSize", {STATE_POINT_SIZE}, SWIZZLE_WWWW},
{"distanceConstantAttenuation", {STATE_POINT_ATTENUATION}, SWIZZLE_XXXX},
{"distanceLinearAttenuation", {STATE_POINT_ATTENUATION}, SWIZZLE_YYYY},
{"distanceQuadraticAttenuation", {STATE_POINT_ATTENUATION}, SWIZZLE_ZZZZ},
};
static const struct gl_builtin_uniform_element gl_FrontMaterial_elements[] = {
{"emission", {STATE_MATERIAL, MAT_ATTRIB_FRONT_EMISSION}, SWIZZLE_XYZW},
{"ambient", {STATE_MATERIAL, MAT_ATTRIB_FRONT_AMBIENT}, SWIZZLE_XYZW},
{"diffuse", {STATE_MATERIAL, MAT_ATTRIB_FRONT_DIFFUSE}, SWIZZLE_XYZW},
{"specular", {STATE_MATERIAL, MAT_ATTRIB_FRONT_SPECULAR}, SWIZZLE_XYZW},
{"shininess", {STATE_MATERIAL, MAT_ATTRIB_FRONT_SHININESS}, SWIZZLE_XXXX},
};
static const struct gl_builtin_uniform_element gl_BackMaterial_elements[] = {
{"emission", {STATE_MATERIAL, MAT_ATTRIB_BACK_EMISSION}, SWIZZLE_XYZW},
{"ambient", {STATE_MATERIAL, MAT_ATTRIB_BACK_AMBIENT}, SWIZZLE_XYZW},
{"diffuse", {STATE_MATERIAL, MAT_ATTRIB_BACK_DIFFUSE}, SWIZZLE_XYZW},
{"specular", {STATE_MATERIAL, MAT_ATTRIB_BACK_SPECULAR}, SWIZZLE_XYZW},
{"shininess", {STATE_MATERIAL, MAT_ATTRIB_BACK_SHININESS}, SWIZZLE_XXXX},
};
static const struct gl_builtin_uniform_element gl_LightSource_elements[] = {
{"ambient", {STATE_LIGHT, 0, STATE_AMBIENT}, SWIZZLE_XYZW},
{"diffuse", {STATE_LIGHT, 0, STATE_DIFFUSE}, SWIZZLE_XYZW},
{"specular", {STATE_LIGHT, 0, STATE_SPECULAR}, SWIZZLE_XYZW},
{"position", {STATE_LIGHT, 0, STATE_POSITION}, SWIZZLE_XYZW},
{"halfVector", {STATE_LIGHT, 0, STATE_HALF_VECTOR}, SWIZZLE_XYZW},
{"spotDirection", {STATE_LIGHT, 0, STATE_SPOT_DIRECTION},
MAKE_SWIZZLE4(SWIZZLE_X,
SWIZZLE_Y,
SWIZZLE_Z,
SWIZZLE_Z)},
{"spotCosCutoff", {STATE_LIGHT, 0, STATE_SPOT_DIRECTION}, SWIZZLE_WWWW},
{"constantAttenuation", {STATE_LIGHT, 0, STATE_ATTENUATION}, SWIZZLE_XXXX},
{"linearAttenuation", {STATE_LIGHT, 0, STATE_ATTENUATION}, SWIZZLE_YYYY},
{"quadraticAttenuation", {STATE_LIGHT, 0, STATE_ATTENUATION}, SWIZZLE_ZZZZ},
{"spotExponent", {STATE_LIGHT, 0, STATE_ATTENUATION}, SWIZZLE_WWWW},
{"spotCutoff", {STATE_LIGHT, 0, STATE_SPOT_CUTOFF}, SWIZZLE_XXXX},
};
static const struct gl_builtin_uniform_element gl_LightModel_elements[] = {
{"ambient", {STATE_LIGHTMODEL_AMBIENT, 0}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_FrontLightModelProduct_elements[] = {
{"sceneColor", {STATE_LIGHTMODEL_SCENECOLOR, 0}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_BackLightModelProduct_elements[] = {
{"sceneColor", {STATE_LIGHTMODEL_SCENECOLOR, 1}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_FrontLightProduct_elements[] = {
{"ambient", {STATE_LIGHTPROD, 0, MAT_ATTRIB_FRONT_AMBIENT}, SWIZZLE_XYZW},
{"diffuse", {STATE_LIGHTPROD, 0, MAT_ATTRIB_FRONT_DIFFUSE}, SWIZZLE_XYZW},
{"specular", {STATE_LIGHTPROD, 0, MAT_ATTRIB_FRONT_SPECULAR}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_BackLightProduct_elements[] = {
{"ambient", {STATE_LIGHTPROD, 0, MAT_ATTRIB_BACK_AMBIENT}, SWIZZLE_XYZW},
{"diffuse", {STATE_LIGHTPROD, 0, MAT_ATTRIB_BACK_DIFFUSE}, SWIZZLE_XYZW},
{"specular", {STATE_LIGHTPROD, 0, MAT_ATTRIB_BACK_SPECULAR}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_TextureEnvColor_elements[] = {
{NULL, {STATE_TEXENV_COLOR, 0}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_EyePlaneS_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_S}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_EyePlaneT_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_T}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_EyePlaneR_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_R}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_EyePlaneQ_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_Q}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_ObjectPlaneS_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_S}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_ObjectPlaneT_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_T}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_ObjectPlaneR_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_R}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_ObjectPlaneQ_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_Q}, SWIZZLE_XYZW},
};
static const struct gl_builtin_uniform_element gl_Fog_elements[] = {
{"color", {STATE_FOG_COLOR}, SWIZZLE_XYZW},
{"density", {STATE_FOG_PARAMS}, SWIZZLE_XXXX},
{"start", {STATE_FOG_PARAMS}, SWIZZLE_YYYY},
{"end", {STATE_FOG_PARAMS}, SWIZZLE_ZZZZ},
{"scale", {STATE_FOG_PARAMS}, SWIZZLE_WWWW},
};
static const struct gl_builtin_uniform_element gl_NormalScale_elements[] = {
{NULL, {STATE_NORMAL_SCALE_EYESPACE}, SWIZZLE_XXXX},
};
static const struct gl_builtin_uniform_element gl_FogParamsOptimizedMESA_elements[] = {
{NULL, {STATE_FOG_PARAMS_OPTIMIZED}, SWIZZLE_XYZW},
};
#define ATTRIB(i) \
static const struct gl_builtin_uniform_element gl_CurrentAttribFrag##i##MESA_elements[] = { \
{NULL, {STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED, i}, SWIZZLE_XYZW}, \
};
ATTRIB(0)
ATTRIB(1)
ATTRIB(2)
ATTRIB(3)
ATTRIB(4)
ATTRIB(5)
ATTRIB(6)
ATTRIB(7)
ATTRIB(8)
ATTRIB(9)
ATTRIB(10)
ATTRIB(11)
ATTRIB(12)
ATTRIB(13)
ATTRIB(14)
ATTRIB(15)
ATTRIB(16)
ATTRIB(17)
ATTRIB(18)
ATTRIB(19)
ATTRIB(20)
ATTRIB(21)
ATTRIB(22)
ATTRIB(23)
ATTRIB(24)
ATTRIB(25)
ATTRIB(26)
ATTRIB(27)
ATTRIB(28)
ATTRIB(29)
ATTRIB(30)
ATTRIB(31)
#define MATRIX(name, statevar) \
static const struct gl_builtin_uniform_element name ## _elements[] = { \
{ NULL, { statevar, 0, 0, 0}, SWIZZLE_XYZW }, \
{ NULL, { statevar, 0, 1, 1}, SWIZZLE_XYZW }, \
{ NULL, { statevar, 0, 2, 2}, SWIZZLE_XYZW }, \
{ NULL, { statevar, 0, 3, 3}, SWIZZLE_XYZW }, \
}
MATRIX(gl_ModelViewMatrix, STATE_MODELVIEW_MATRIX_TRANSPOSE);
MATRIX(gl_ModelViewMatrixInverse, STATE_MODELVIEW_MATRIX_INVTRANS);
MATRIX(gl_ModelViewMatrixTranspose, STATE_MODELVIEW_MATRIX);
MATRIX(gl_ModelViewMatrixInverseTranspose, STATE_MODELVIEW_MATRIX_INVERSE);
MATRIX(gl_ProjectionMatrix, STATE_PROJECTION_MATRIX_TRANSPOSE);
MATRIX(gl_ProjectionMatrixInverse, STATE_PROJECTION_MATRIX_INVTRANS);
MATRIX(gl_ProjectionMatrixTranspose, STATE_PROJECTION_MATRIX);
MATRIX(gl_ProjectionMatrixInverseTranspose, STATE_PROJECTION_MATRIX_INVERSE);
MATRIX(gl_ModelViewProjectionMatrix, STATE_MVP_MATRIX_TRANSPOSE);
MATRIX(gl_ModelViewProjectionMatrixInverse, STATE_MVP_MATRIX_INVTRANS);
MATRIX(gl_ModelViewProjectionMatrixTranspose, STATE_MVP_MATRIX);
MATRIX(gl_ModelViewProjectionMatrixInverseTranspose, STATE_MVP_MATRIX_INVERSE);
MATRIX(gl_TextureMatrix, STATE_TEXTURE_MATRIX_TRANSPOSE);
MATRIX(gl_TextureMatrixInverse, STATE_TEXTURE_MATRIX_INVTRANS);
MATRIX(gl_TextureMatrixTranspose, STATE_TEXTURE_MATRIX);
MATRIX(gl_TextureMatrixInverseTranspose, STATE_TEXTURE_MATRIX_INVERSE);
static const struct gl_builtin_uniform_element gl_NormalMatrix_elements[] = {
{ NULL, { STATE_MODELVIEW_MATRIX_INVERSE, 0, 0, 0},
MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z) },
{ NULL, { STATE_MODELVIEW_MATRIX_INVERSE, 0, 1, 1},
MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z) },
{ NULL, { STATE_MODELVIEW_MATRIX_INVERSE, 0, 2, 2},
MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z) },
};
#undef MATRIX
#define STATEVAR(name) {#name, name ## _elements, ARRAY_SIZE(name ## _elements)}
static const struct gl_builtin_uniform_desc _mesa_builtin_uniform_desc[] = {
STATEVAR(gl_NumSamples),
STATEVAR(gl_DepthRange),
STATEVAR(gl_ClipPlane),
STATEVAR(gl_Point),
STATEVAR(gl_FrontMaterial),
STATEVAR(gl_BackMaterial),
STATEVAR(gl_LightSource),
STATEVAR(gl_LightModel),
STATEVAR(gl_FrontLightModelProduct),
STATEVAR(gl_BackLightModelProduct),
STATEVAR(gl_FrontLightProduct),
STATEVAR(gl_BackLightProduct),
STATEVAR(gl_TextureEnvColor),
STATEVAR(gl_EyePlaneS),
STATEVAR(gl_EyePlaneT),
STATEVAR(gl_EyePlaneR),
STATEVAR(gl_EyePlaneQ),
STATEVAR(gl_ObjectPlaneS),
STATEVAR(gl_ObjectPlaneT),
STATEVAR(gl_ObjectPlaneR),
STATEVAR(gl_ObjectPlaneQ),
STATEVAR(gl_Fog),
STATEVAR(gl_ModelViewMatrix),
STATEVAR(gl_ModelViewMatrixInverse),
STATEVAR(gl_ModelViewMatrixTranspose),
STATEVAR(gl_ModelViewMatrixInverseTranspose),
STATEVAR(gl_ProjectionMatrix),
STATEVAR(gl_ProjectionMatrixInverse),
STATEVAR(gl_ProjectionMatrixTranspose),
STATEVAR(gl_ProjectionMatrixInverseTranspose),
STATEVAR(gl_ModelViewProjectionMatrix),
STATEVAR(gl_ModelViewProjectionMatrixInverse),
STATEVAR(gl_ModelViewProjectionMatrixTranspose),
STATEVAR(gl_ModelViewProjectionMatrixInverseTranspose),
STATEVAR(gl_TextureMatrix),
STATEVAR(gl_TextureMatrixInverse),
STATEVAR(gl_TextureMatrixTranspose),
STATEVAR(gl_TextureMatrixInverseTranspose),
STATEVAR(gl_NormalMatrix),
STATEVAR(gl_NormalScale),
STATEVAR(gl_FogParamsOptimizedMESA),
STATEVAR(gl_CurrentAttribFrag0MESA),
STATEVAR(gl_CurrentAttribFrag1MESA),
STATEVAR(gl_CurrentAttribFrag2MESA),
STATEVAR(gl_CurrentAttribFrag3MESA),
STATEVAR(gl_CurrentAttribFrag4MESA),
STATEVAR(gl_CurrentAttribFrag5MESA),
STATEVAR(gl_CurrentAttribFrag6MESA),
STATEVAR(gl_CurrentAttribFrag7MESA),
STATEVAR(gl_CurrentAttribFrag8MESA),
STATEVAR(gl_CurrentAttribFrag9MESA),
STATEVAR(gl_CurrentAttribFrag10MESA),
STATEVAR(gl_CurrentAttribFrag11MESA),
STATEVAR(gl_CurrentAttribFrag12MESA),
STATEVAR(gl_CurrentAttribFrag13MESA),
STATEVAR(gl_CurrentAttribFrag14MESA),
STATEVAR(gl_CurrentAttribFrag15MESA),
STATEVAR(gl_CurrentAttribFrag16MESA),
STATEVAR(gl_CurrentAttribFrag17MESA),
STATEVAR(gl_CurrentAttribFrag18MESA),
STATEVAR(gl_CurrentAttribFrag19MESA),
STATEVAR(gl_CurrentAttribFrag20MESA),
STATEVAR(gl_CurrentAttribFrag21MESA),
STATEVAR(gl_CurrentAttribFrag22MESA),
STATEVAR(gl_CurrentAttribFrag23MESA),
STATEVAR(gl_CurrentAttribFrag24MESA),
STATEVAR(gl_CurrentAttribFrag25MESA),
STATEVAR(gl_CurrentAttribFrag26MESA),
STATEVAR(gl_CurrentAttribFrag27MESA),
STATEVAR(gl_CurrentAttribFrag28MESA),
STATEVAR(gl_CurrentAttribFrag29MESA),
STATEVAR(gl_CurrentAttribFrag30MESA),
STATEVAR(gl_CurrentAttribFrag31MESA),
{NULL, NULL, 0}
};
namespace {
/**
* Data structure that accumulates fields for the gl_PerVertex interface
* block.
*/
class per_vertex_accumulator
{
public:
per_vertex_accumulator();
void add_field(int slot, const glsl_type *type, int precision,
const char *name, enum glsl_interp_mode interp);
const glsl_type *construct_interface_instance() const;
private:
glsl_struct_field fields[14];
unsigned num_fields;
};
per_vertex_accumulator::per_vertex_accumulator()
: fields(),
num_fields(0)
{
}
void
per_vertex_accumulator::add_field(int slot, const glsl_type *type,
int precision, const char *name,
enum glsl_interp_mode interp)
{
assert(this->num_fields < ARRAY_SIZE(this->fields));
this->fields[this->num_fields].type = type;
this->fields[this->num_fields].name = name;
this->fields[this->num_fields].matrix_layout = GLSL_MATRIX_LAYOUT_INHERITED;
this->fields[this->num_fields].location = slot;
this->fields[this->num_fields].offset = -1;
this->fields[this->num_fields].interpolation = interp;
this->fields[this->num_fields].centroid = 0;
this->fields[this->num_fields].sample = 0;
this->fields[this->num_fields].patch = 0;
this->fields[this->num_fields].precision = precision;
this->fields[this->num_fields].memory_read_only = 0;
this->fields[this->num_fields].memory_write_only = 0;
this->fields[this->num_fields].memory_coherent = 0;
this->fields[this->num_fields].memory_volatile = 0;
this->fields[this->num_fields].memory_restrict = 0;
this->fields[this->num_fields].image_format = PIPE_FORMAT_NONE;
this->fields[this->num_fields].explicit_xfb_buffer = 0;
this->fields[this->num_fields].xfb_buffer = -1;
this->fields[this->num_fields].xfb_stride = -1;
this->num_fields++;
}
const glsl_type *
per_vertex_accumulator::construct_interface_instance() const
{
return glsl_type::get_interface_instance(this->fields, this->num_fields,
GLSL_INTERFACE_PACKING_STD140,
false,
"gl_PerVertex");
}
class builtin_variable_generator
{
public:
builtin_variable_generator(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
void generate_constants();
void generate_uniforms();
void generate_special_vars();
void generate_vs_special_vars();
void generate_tcs_special_vars();
void generate_tes_special_vars();
void generate_gs_special_vars();
void generate_fs_special_vars();
void generate_cs_special_vars();
void generate_varyings();
private:
const glsl_type *array(const glsl_type *base, unsigned elements)
{
return glsl_type::get_array_instance(base, elements);
}
const glsl_type *type(const char *name)
{
return symtab->get_type(name);
}
ir_variable *add_input(int slot, const glsl_type *type, int precision,
const char *name,
enum glsl_interp_mode interp = INTERP_MODE_NONE)
{
return add_variable(name, type, precision, ir_var_shader_in, slot, interp);
}
ir_variable *add_input(int slot, const glsl_type *type, const char *name,
enum glsl_interp_mode interp = INTERP_MODE_NONE)
{
return add_input(slot, type, GLSL_PRECISION_NONE, name, interp);
}
ir_variable *add_output(int slot, const glsl_type *type, int precision,
const char *name)
{
return add_variable(name, type, precision, ir_var_shader_out, slot);
}
ir_variable *add_output(int slot, const glsl_type *type, const char *name)
{
return add_output(slot, type, GLSL_PRECISION_NONE, name);
}
ir_variable *add_index_output(int slot, int index, const glsl_type *type,
int precision, const char *name)
{
return add_index_variable(name, type, precision, ir_var_shader_out, slot,
index);
}
ir_variable *add_system_value(int slot, const glsl_type *type, int precision,
const char *name)
{
return add_variable(name, type, precision, ir_var_system_value, slot);
}
ir_variable *add_system_value(int slot, const glsl_type *type,
const char *name)
{
return add_system_value(slot, type, GLSL_PRECISION_NONE, name);
}
ir_variable *add_variable(const char *name, const glsl_type *type,
int precision, enum ir_variable_mode mode,
int slot, enum glsl_interp_mode interp = INTERP_MODE_NONE);
ir_variable *add_index_variable(const char *name, const glsl_type *type,
int precision, enum ir_variable_mode mode,
int slot, int index);
ir_variable *add_uniform(const glsl_type *type, int precision,
const char *name);
ir_variable *add_uniform(const glsl_type *type, const char *name)
{
return add_uniform(type, GLSL_PRECISION_NONE, name);
}
ir_variable *add_const(const char *name, int precision, int value);
ir_variable *add_const(const char *name, int value)
{
return add_const(name, GLSL_PRECISION_MEDIUM, value);
}
ir_variable *add_const_ivec3(const char *name, int x, int y, int z);
void add_varying(int slot, const glsl_type *type, int precision,
const char *name,
enum glsl_interp_mode interp = INTERP_MODE_NONE);
void add_varying(int slot, const glsl_type *type, const char *name,
enum glsl_interp_mode interp = INTERP_MODE_NONE)
{
add_varying(slot, type, GLSL_PRECISION_NONE, name, interp);
}
exec_list * const instructions;
struct _mesa_glsl_parse_state * const state;
glsl_symbol_table * const symtab;
/**
* True if compatibility-profile-only variables should be included. (In
* desktop GL, these are always included when the GLSL version is 1.30 and
* or below).
*/
const bool compatibility;
const glsl_type * const bool_t;
const glsl_type * const int_t;
const glsl_type * const uint_t;
const glsl_type * const uint64_t;
const glsl_type * const float_t;
const glsl_type * const vec2_t;
const glsl_type * const vec3_t;
const glsl_type * const vec4_t;
const glsl_type * const uvec3_t;
const glsl_type * const mat3_t;
const glsl_type * const mat4_t;
per_vertex_accumulator per_vertex_in;
per_vertex_accumulator per_vertex_out;
};
builtin_variable_generator::builtin_variable_generator(
exec_list *instructions, struct _mesa_glsl_parse_state *state)
: instructions(instructions), state(state), symtab(state->symbols),
compatibility(state->compat_shader || state->ARB_compatibility_enable),
bool_t(glsl_type::bool_type), int_t(glsl_type::int_type),
uint_t(glsl_type::uint_type),
uint64_t(glsl_type::uint64_t_type),
float_t(glsl_type::float_type), vec2_t(glsl_type::vec2_type),
vec3_t(glsl_type::vec3_type), vec4_t(glsl_type::vec4_type),
uvec3_t(glsl_type::uvec3_type),
mat3_t(glsl_type::mat3_type), mat4_t(glsl_type::mat4_type)
{
}
ir_variable *
builtin_variable_generator::add_index_variable(const char *name,
const glsl_type *type,
int precision,
enum ir_variable_mode mode,
int slot, int index)
{
ir_variable *var = new(symtab) ir_variable(type, name, mode);
var->data.how_declared = ir_var_declared_implicitly;
switch (var->data.mode) {
case ir_var_auto:
case ir_var_shader_in:
case ir_var_uniform:
case ir_var_system_value:
var->data.read_only = true;
break;
case ir_var_shader_out:
case ir_var_shader_storage:
break;
default:
/* The only variables that are added using this function should be
* uniforms, shader storage, shader inputs, and shader outputs, constants
* (which use ir_var_auto), and system values.
*/
assert(0);
break;
}
var->data.location = slot;
var->data.explicit_location = (slot >= 0);
var->data.explicit_index = 1;
var->data.index = index;
if (state->es_shader)
var->data.precision = precision;
/* Once the variable is created an initialized, add it to the symbol table
* and add the declaration to the IR stream.
*/
instructions->push_tail(var);
symtab->add_variable(var);
return var;
}
ir_variable *
builtin_variable_generator::add_variable(const char *name,
const glsl_type *type,
int precision,
enum ir_variable_mode mode, int slot,
enum glsl_interp_mode interp)
{
ir_variable *var = new(symtab) ir_variable(type, name, mode);
var->data.how_declared = ir_var_declared_implicitly;
switch (var->data.mode) {
case ir_var_auto:
case ir_var_shader_in:
case ir_var_uniform:
case ir_var_system_value:
var->data.read_only = true;
break;
case ir_var_shader_out:
case ir_var_shader_storage:
break;
default:
/* The only variables that are added using this function should be
* uniforms, shader storage, shader inputs, and shader outputs, constants
* (which use ir_var_auto), and system values.
*/
assert(0);
break;
}
var->data.location = slot;
var->data.explicit_location = (slot >= 0);
var->data.explicit_index = 0;
var->data.interpolation = interp;
if (state->es_shader)
var->data.precision = precision;
/* Once the variable is created an initialized, add it to the symbol table
* and add the declaration to the IR stream.
*/
instructions->push_tail(var);
symtab->add_variable(var);
return var;
}
extern "C" const struct gl_builtin_uniform_desc *
_mesa_glsl_get_builtin_uniform_desc(const char *name)
{
for (unsigned i = 0; _mesa_builtin_uniform_desc[i].name != NULL; i++) {
if (strcmp(_mesa_builtin_uniform_desc[i].name, name) == 0) {
return &_mesa_builtin_uniform_desc[i];
}
}
return NULL;
}
ir_variable *
builtin_variable_generator::add_uniform(const glsl_type *type,
int precision,
const char *name)
{
ir_variable *const uni =
add_variable(name, type, precision, ir_var_uniform, -1);
const struct gl_builtin_uniform_desc* const statevar =
_mesa_glsl_get_builtin_uniform_desc(name);
assert(statevar != NULL);
const unsigned array_count = type->is_array() ? type->length : 1;
ir_state_slot *slots =
uni->allocate_state_slots(array_count * statevar->num_elements);
for (unsigned a = 0; a < array_count; a++) {
for (unsigned j = 0; j < statevar->num_elements; j++) {
const struct gl_builtin_uniform_element *element =
&statevar->elements[j];
memcpy(slots->tokens, element->tokens, sizeof(element->tokens));
if (type->is_array())
slots->tokens[1] = a;
slots->swizzle = element->swizzle;
slots++;
}
}
return uni;
}
ir_variable *
builtin_variable_generator::add_const(const char *name, int precision,
int value)
{
ir_variable *const var = add_variable(name, glsl_type::int_type,
precision, ir_var_auto, -1);
var->constant_value = new(var) ir_constant(value);
var->constant_initializer = new(var) ir_constant(value);
var->data.has_initializer = true;
return var;
}
ir_variable *
builtin_variable_generator::add_const_ivec3(const char *name, int x, int y,
int z)
{
ir_variable *const var = add_variable(name, glsl_type::ivec3_type,
GLSL_PRECISION_HIGH,
ir_var_auto, -1);
ir_constant_data data;
memset(&data, 0, sizeof(data));
data.i[0] = x;
data.i[1] = y;
data.i[2] = z;
var->constant_value = new(var) ir_constant(glsl_type::ivec3_type, &data);
var->constant_initializer =
new(var) ir_constant(glsl_type::ivec3_type, &data);
var->data.has_initializer = true;
return var;
}
void
builtin_variable_generator::generate_constants()
{
add_const("gl_MaxVertexAttribs", state->Const.MaxVertexAttribs);
add_const("gl_MaxVertexTextureImageUnits",
state->Const.MaxVertexTextureImageUnits);
add_const("gl_MaxCombinedTextureImageUnits",
state->Const.MaxCombinedTextureImageUnits);
add_const("gl_MaxTextureImageUnits", state->Const.MaxTextureImageUnits);
add_const("gl_MaxDrawBuffers", state->Const.MaxDrawBuffers);
/* Max uniforms/varyings: GLSL ES counts these in units of vectors; desktop
* GL counts them in units of "components" or "floats" and also in units
* of vectors since GL 4.1
*/
if (!state->es_shader) {
add_const("gl_MaxFragmentUniformComponents",
state->Const.MaxFragmentUniformComponents);
add_const("gl_MaxVertexUniformComponents",
state->Const.MaxVertexUniformComponents);
}
if (state->is_version(410, 100)) {
add_const("gl_MaxVertexUniformVectors",
state->Const.MaxVertexUniformComponents / 4);
add_const("gl_MaxFragmentUniformVectors",
state->Const.MaxFragmentUniformComponents / 4);
/* In GLSL ES 3.00, gl_MaxVaryingVectors was split out to separate
* vertex and fragment shader constants.
*/
if (state->is_version(0, 300)) {
add_const("gl_MaxVertexOutputVectors",
state->ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents / 4);
add_const("gl_MaxFragmentInputVectors",
state->ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents / 4);
} else {
add_const("gl_MaxVaryingVectors",
state->ctx->Const.MaxVarying);
}
/* EXT_blend_func_extended brings a built in constant
* for determining number of dual source draw buffers
*/
if (state->EXT_blend_func_extended_enable) {
add_const("gl_MaxDualSourceDrawBuffersEXT",
state->Const.MaxDualSourceDrawBuffers);
}
}
/* gl_MaxVaryingFloats was deprecated in GLSL 1.30+, and was moved to
* compat profile in GLSL 4.20. GLSL ES never supported this constant.
*/
if (compatibility || !state->is_version(420, 100)) {
add_const("gl_MaxVaryingFloats", state->ctx->Const.MaxVarying * 4);
}
/* Texel offsets were introduced in ARB_shading_language_420pack (which
* requires desktop GLSL version 130), and adopted into desktop GLSL
* version 4.20 and GLSL ES version 3.00.
*/
if ((state->is_version(130, 0) &&
state->ARB_shading_language_420pack_enable) ||
state->is_version(420, 300)) {
add_const("gl_MinProgramTexelOffset",
state->Const.MinProgramTexelOffset);
add_const("gl_MaxProgramTexelOffset",
state->Const.MaxProgramTexelOffset);
}
if (state->has_clip_distance()) {
add_const("gl_MaxClipDistances", state->Const.MaxClipPlanes);
}
if (state->is_version(130, 0)) {
add_const("gl_MaxVaryingComponents", state->ctx->Const.MaxVarying * 4);
}
if (state->has_cull_distance()) {
add_const("gl_MaxCullDistances", state->Const.MaxClipPlanes);
add_const("gl_MaxCombinedClipAndCullDistances",
state->Const.MaxClipPlanes);
}
if (state->has_geometry_shader()) {
add_const("gl_MaxVertexOutputComponents",
state->Const.MaxVertexOutputComponents);
add_const("gl_MaxGeometryInputComponents",
state->Const.MaxGeometryInputComponents);
add_const("gl_MaxGeometryOutputComponents",
state->Const.MaxGeometryOutputComponents);
add_const("gl_MaxFragmentInputComponents",
state->Const.MaxFragmentInputComponents);
add_const("gl_MaxGeometryTextureImageUnits",
state->Const.MaxGeometryTextureImageUnits);
add_const("gl_MaxGeometryOutputVertices",
state->Const.MaxGeometryOutputVertices);
add_const("gl_MaxGeometryTotalOutputComponents",
state->Const.MaxGeometryTotalOutputComponents);
add_const("gl_MaxGeometryUniformComponents",
state->Const.MaxGeometryUniformComponents);
/* Note: the GLSL 1.50-4.40 specs require
* gl_MaxGeometryVaryingComponents to be present, and to be at least 64.
* But they do not define what it means (and there does not appear to be
* any corresponding constant in the GL specs). However,
* ARB_geometry_shader4 defines MAX_GEOMETRY_VARYING_COMPONENTS_ARB to
* be the maximum number of components available for use as geometry
* outputs. So we assume this is a synonym for
* gl_MaxGeometryOutputComponents.
*/
add_const("gl_MaxGeometryVaryingComponents",
state->Const.MaxGeometryOutputComponents);
}
if (compatibility) {
/* Note: gl_MaxLights stopped being listed as an explicit constant in
* GLSL 1.30, however it continues to be referred to (as a minimum size
* for compatibility-mode uniforms) all the way up through GLSL 4.30, so
* this seems like it was probably an oversight.
*/
add_const("gl_MaxLights", state->Const.MaxLights);
add_const("gl_MaxClipPlanes", state->Const.MaxClipPlanes);
/* Note: gl_MaxTextureUnits wasn't made compatibility-only until GLSL
* 1.50, however this seems like it was probably an oversight.
*/
add_const("gl_MaxTextureUnits", state->Const.MaxTextureUnits);
/* Note: gl_MaxTextureCoords was left out of GLSL 1.40, but it was
* re-introduced in GLSL 1.50, so this seems like it was probably an
* oversight.
*/
add_const("gl_MaxTextureCoords", state->Const.MaxTextureCoords);
}
if (state->has_atomic_counters()) {
add_const("gl_MaxVertexAtomicCounters",
state->Const.MaxVertexAtomicCounters);
add_const("gl_MaxFragmentAtomicCounters",
state->Const.MaxFragmentAtomicCounters);
add_const("gl_MaxCombinedAtomicCounters",
state->Const.MaxCombinedAtomicCounters);
add_const("gl_MaxAtomicCounterBindings",
state->Const.MaxAtomicBufferBindings);
if (state->has_geometry_shader()) {
add_const("gl_MaxGeometryAtomicCounters",
state->Const.MaxGeometryAtomicCounters);
}
if (state->is_version(110, 320)) {
add_const("gl_MaxTessControlAtomicCounters",
state->Const.MaxTessControlAtomicCounters);
add_const("gl_MaxTessEvaluationAtomicCounters",
state->Const.MaxTessEvaluationAtomicCounters);
}
}
if (state->is_version(420, 310)) {
add_const("gl_MaxVertexAtomicCounterBuffers",
state->Const.MaxVertexAtomicCounterBuffers);
add_const("gl_MaxFragmentAtomicCounterBuffers",
state->Const.MaxFragmentAtomicCounterBuffers);
add_const("gl_MaxCombinedAtomicCounterBuffers",
state->Const.MaxCombinedAtomicCounterBuffers);
add_const("gl_MaxAtomicCounterBufferSize",
state->Const.MaxAtomicCounterBufferSize);
if (state->has_geometry_shader()) {
add_const("gl_MaxGeometryAtomicCounterBuffers",
state->Const.MaxGeometryAtomicCounterBuffers);
}
if (state->is_version(110, 320)) {
add_const("gl_MaxTessControlAtomicCounterBuffers",
state->Const.MaxTessControlAtomicCounterBuffers);
add_const("gl_MaxTessEvaluationAtomicCounterBuffers",
state->Const.MaxTessEvaluationAtomicCounterBuffers);
}
}
if (state->is_version(430, 310) || state->ARB_compute_shader_enable) {
add_const("gl_MaxComputeAtomicCounterBuffers",
state->Const.MaxComputeAtomicCounterBuffers);
add_const("gl_MaxComputeAtomicCounters",
state->Const.MaxComputeAtomicCounters);
add_const("gl_MaxComputeImageUniforms",
state->Const.MaxComputeImageUniforms);
add_const("gl_MaxComputeTextureImageUnits",
state->Const.MaxComputeTextureImageUnits);
add_const("gl_MaxComputeUniformComponents",
state->Const.MaxComputeUniformComponents);
add_const_ivec3("gl_MaxComputeWorkGroupCount",
state->Const.MaxComputeWorkGroupCount[0],
state->Const.MaxComputeWorkGroupCount[1],
state->Const.MaxComputeWorkGroupCount[2]);
add_const_ivec3("gl_MaxComputeWorkGroupSize",
state->Const.MaxComputeWorkGroupSize[0],
state->Const.MaxComputeWorkGroupSize[1],
state->Const.MaxComputeWorkGroupSize[2]);
/* From the GLSL 4.40 spec, section 7.1 (Built-In Language Variables):
*
* The built-in constant gl_WorkGroupSize is a compute-shader
* constant containing the local work-group size of the shader. The
* size of the work group in the X, Y, and Z dimensions is stored in
* the x, y, and z components. The constants values in
* gl_WorkGroupSize will match those specified in the required
* local_size_x, local_size_y, and local_size_z layout qualifiers
* for the current shader. This is a constant so that it can be
* used to size arrays of memory that can be shared within the local
* work group. It is a compile-time error to use gl_WorkGroupSize
* in a shader that does not declare a fixed local group size, or
* before that shader has declared a fixed local group size, using
* local_size_x, local_size_y, and local_size_z.
*
* To prevent the shader from trying to refer to gl_WorkGroupSize before
* the layout declaration, we don't define it here. Intead we define it
* in ast_cs_input_layout::hir().
*/
}
if (state->has_enhanced_layouts()) {
add_const("gl_MaxTransformFeedbackBuffers",
state->Const.MaxTransformFeedbackBuffers);
add_const("gl_MaxTransformFeedbackInterleavedComponents",
state->Const.MaxTransformFeedbackInterleavedComponents);
}
if (state->has_shader_image_load_store()) {
add_const("gl_MaxImageUnits",
state->Const.MaxImageUnits);
add_const("gl_MaxVertexImageUniforms",
state->Const.MaxVertexImageUniforms);
add_const("gl_MaxFragmentImageUniforms",
state->Const.MaxFragmentImageUniforms);
add_const("gl_MaxCombinedImageUniforms",
state->Const.MaxCombinedImageUniforms);
if (state->has_geometry_shader()) {
add_const("gl_MaxGeometryImageUniforms",
state->Const.MaxGeometryImageUniforms);
}
if (!state->es_shader) {
add_const("gl_MaxCombinedImageUnitsAndFragmentOutputs",
state->Const.MaxCombinedShaderOutputResources);
add_const("gl_MaxImageSamples",
state->Const.MaxImageSamples);
}
if (state->has_tessellation_shader()) {
add_const("gl_MaxTessControlImageUniforms",
state->Const.MaxTessControlImageUniforms);
add_const("gl_MaxTessEvaluationImageUniforms",
state->Const.MaxTessEvaluationImageUniforms);
}
}
if (state->is_version(440, 310) ||
state->ARB_ES3_1_compatibility_enable) {
add_const("gl_MaxCombinedShaderOutputResources",
state->Const.MaxCombinedShaderOutputResources);
}
if (state->is_version(410, 0) ||
state->ARB_viewport_array_enable ||
state->OES_viewport_array_enable) {
add_const("gl_MaxViewports", GLSL_PRECISION_HIGH,
state->Const.MaxViewports);
}
if (state->has_tessellation_shader()) {
add_const("gl_MaxPatchVertices", state->Const.MaxPatchVertices);
add_const("gl_MaxTessGenLevel", state->Const.MaxTessGenLevel);
add_const("gl_MaxTessControlInputComponents", state->Const.MaxTessControlInputComponents);
add_const("gl_MaxTessControlOutputComponents", state->Const.MaxTessControlOutputComponents);
add_const("gl_MaxTessControlTextureImageUnits", state->Const.MaxTessControlTextureImageUnits);
add_const("gl_MaxTessEvaluationInputComponents", state->Const.MaxTessEvaluationInputComponents);
add_const("gl_MaxTessEvaluationOutputComponents", state->Const.MaxTessEvaluationOutputComponents);
add_const("gl_MaxTessEvaluationTextureImageUnits", state->Const.MaxTessEvaluationTextureImageUnits);
add_const("gl_MaxTessPatchComponents", state->Const.MaxTessPatchComponents);
add_const("gl_MaxTessControlTotalOutputComponents", state->Const.MaxTessControlTotalOutputComponents);
add_const("gl_MaxTessControlUniformComponents", state->Const.MaxTessControlUniformComponents);
add_const("gl_MaxTessEvaluationUniformComponents", state->Const.MaxTessEvaluationUniformComponents);
}
if (state->is_version(450, 320) ||
state->OES_sample_variables_enable ||
state->ARB_ES3_1_compatibility_enable)
add_const("gl_MaxSamples", state->Const.MaxSamples);
}
/**
* Generate uniform variables (which exist in all types of shaders).
*/
void
builtin_variable_generator::generate_uniforms()
{
if (state->is_version(400, 320) ||
state->ARB_sample_shading_enable ||
state->OES_sample_variables_enable)
add_uniform(int_t, GLSL_PRECISION_LOW, "gl_NumSamples");
add_uniform(type("gl_DepthRangeParameters"), "gl_DepthRange");
for (unsigned i = 0; i < VARYING_SLOT_VAR0; i++) {
char name[128];
snprintf(name, sizeof(name), "gl_CurrentAttribFrag%uMESA", i);
add_uniform(vec4_t, name);
}
if (compatibility) {
add_uniform(mat4_t, "gl_ModelViewMatrix");
add_uniform(mat4_t, "gl_ProjectionMatrix");
add_uniform(mat4_t, "gl_ModelViewProjectionMatrix");
add_uniform(mat3_t, "gl_NormalMatrix");
add_uniform(mat4_t, "gl_ModelViewMatrixInverse");
add_uniform(mat4_t, "gl_ProjectionMatrixInverse");
add_uniform(mat4_t, "gl_ModelViewProjectionMatrixInverse");
add_uniform(mat4_t, "gl_ModelViewMatrixTranspose");
add_uniform(mat4_t, "gl_ProjectionMatrixTranspose");
add_uniform(mat4_t, "gl_ModelViewProjectionMatrixTranspose");
add_uniform(mat4_t, "gl_ModelViewMatrixInverseTranspose");
add_uniform(mat4_t, "gl_ProjectionMatrixInverseTranspose");
add_uniform(mat4_t, "gl_ModelViewProjectionMatrixInverseTranspose");
add_uniform(float_t, "gl_NormalScale");
add_uniform(type("gl_LightModelParameters"), "gl_LightModel");
add_uniform(vec4_t, "gl_FogParamsOptimizedMESA");
const glsl_type *const mat4_array_type =
array(mat4_t, state->Const.MaxTextureCoords);
add_uniform(mat4_array_type, "gl_TextureMatrix");
add_uniform(mat4_array_type, "gl_TextureMatrixInverse");
add_uniform(mat4_array_type, "gl_TextureMatrixTranspose");
add_uniform(mat4_array_type, "gl_TextureMatrixInverseTranspose");
add_uniform(array(vec4_t, state->Const.MaxClipPlanes), "gl_ClipPlane");
add_uniform(type("gl_PointParameters"), "gl_Point");
const glsl_type *const material_parameters_type =
type("gl_MaterialParameters");
add_uniform(material_parameters_type, "gl_FrontMaterial");
add_uniform(material_parameters_type, "gl_BackMaterial");
add_uniform(array(type("gl_LightSourceParameters"),
state->Const.MaxLights),
"gl_LightSource");
const glsl_type *const light_model_products_type =
type("gl_LightModelProducts");
add_uniform(light_model_products_type, "gl_FrontLightModelProduct");
add_uniform(light_model_products_type, "gl_BackLightModelProduct");
const glsl_type *const light_products_type =
array(type("gl_LightProducts"), state->Const.MaxLights);
add_uniform(light_products_type, "gl_FrontLightProduct");
add_uniform(light_products_type, "gl_BackLightProduct");
add_uniform(array(vec4_t, state->Const.MaxTextureUnits),
"gl_TextureEnvColor");
const glsl_type *const texcoords_vec4 =
array(vec4_t, state->Const.MaxTextureCoords);
add_uniform(texcoords_vec4, "gl_EyePlaneS");
add_uniform(texcoords_vec4, "gl_EyePlaneT");
add_uniform(texcoords_vec4, "gl_EyePlaneR");
add_uniform(texcoords_vec4, "gl_EyePlaneQ");
add_uniform(texcoords_vec4, "gl_ObjectPlaneS");
add_uniform(texcoords_vec4, "gl_ObjectPlaneT");
add_uniform(texcoords_vec4, "gl_ObjectPlaneR");
add_uniform(texcoords_vec4, "gl_ObjectPlaneQ");
add_uniform(type("gl_FogParameters"), "gl_Fog");
}
}
/**
* Generate special variables which exist in all shaders.
*/
void
builtin_variable_generator::generate_special_vars()
{
if (state->ARB_shader_ballot_enable) {
add_system_value(SYSTEM_VALUE_SUBGROUP_SIZE, uint_t, "gl_SubGroupSizeARB");
add_system_value(SYSTEM_VALUE_SUBGROUP_INVOCATION, uint_t, "gl_SubGroupInvocationARB");
add_system_value(SYSTEM_VALUE_SUBGROUP_EQ_MASK, uint64_t, "gl_SubGroupEqMaskARB");
add_system_value(SYSTEM_VALUE_SUBGROUP_GE_MASK, uint64_t, "gl_SubGroupGeMaskARB");
add_system_value(SYSTEM_VALUE_SUBGROUP_GT_MASK, uint64_t, "gl_SubGroupGtMaskARB");
add_system_value(SYSTEM_VALUE_SUBGROUP_LE_MASK, uint64_t, "gl_SubGroupLeMaskARB");
add_system_value(SYSTEM_VALUE_SUBGROUP_LT_MASK, uint64_t, "gl_SubGroupLtMaskARB");
}
}
/**
* Generate variables which only exist in vertex shaders.
*/
void
builtin_variable_generator::generate_vs_special_vars()
{
if (state->is_version(130, 300) || state->EXT_gpu_shader4_enable) {
add_system_value(SYSTEM_VALUE_VERTEX_ID, int_t, GLSL_PRECISION_HIGH,
"gl_VertexID");
}
if (state->is_version(460, 0)) {
add_system_value(SYSTEM_VALUE_BASE_VERTEX, int_t, "gl_BaseVertex");
add_system_value(SYSTEM_VALUE_BASE_INSTANCE, int_t, "gl_BaseInstance");
add_system_value(SYSTEM_VALUE_DRAW_ID, int_t, "gl_DrawID");
}
if (state->EXT_draw_instanced_enable && state->is_version(0, 100))
add_system_value(SYSTEM_VALUE_INSTANCE_ID, int_t, GLSL_PRECISION_HIGH,
"gl_InstanceIDEXT");
if (state->ARB_draw_instanced_enable)
add_system_value(SYSTEM_VALUE_INSTANCE_ID, int_t, "gl_InstanceIDARB");
if (state->ARB_draw_instanced_enable || state->is_version(140, 300) ||
state->EXT_gpu_shader4_enable) {
add_system_value(SYSTEM_VALUE_INSTANCE_ID, int_t, GLSL_PRECISION_HIGH,
"gl_InstanceID");
}
if (state->ARB_shader_draw_parameters_enable) {
add_system_value(SYSTEM_VALUE_BASE_VERTEX, int_t, "gl_BaseVertexARB");
add_system_value(SYSTEM_VALUE_BASE_INSTANCE, int_t, "gl_BaseInstanceARB");
add_system_value(SYSTEM_VALUE_DRAW_ID, int_t, "gl_DrawIDARB");
}
if (compatibility) {
add_input(VERT_ATTRIB_POS, vec4_t, "gl_Vertex");
add_input(VERT_ATTRIB_NORMAL, vec3_t, "gl_Normal");
add_input(VERT_ATTRIB_COLOR0, vec4_t, "gl_Color");
add_input(VERT_ATTRIB_COLOR1, vec4_t, "gl_SecondaryColor");
add_input(VERT_ATTRIB_TEX0, vec4_t, "gl_MultiTexCoord0");
add_input(VERT_ATTRIB_TEX1, vec4_t, "gl_MultiTexCoord1");
add_input(VERT_ATTRIB_TEX2, vec4_t, "gl_MultiTexCoord2");
add_input(VERT_ATTRIB_TEX3, vec4_t, "gl_MultiTexCoord3");
add_input(VERT_ATTRIB_TEX4, vec4_t, "gl_MultiTexCoord4");
add_input(VERT_ATTRIB_TEX5, vec4_t, "gl_MultiTexCoord5");
add_input(VERT_ATTRIB_TEX6, vec4_t, "gl_MultiTexCoord6");
add_input(VERT_ATTRIB_TEX7, vec4_t, "gl_MultiTexCoord7");
add_input(VERT_ATTRIB_FOG, float_t, "gl_FogCoord");
}
}
/**
* Generate variables which only exist in tessellation control shaders.
*/
void
builtin_variable_generator::generate_tcs_special_vars()
{
add_system_value(SYSTEM_VALUE_PRIMITIVE_ID, int_t, GLSL_PRECISION_HIGH,
"gl_PrimitiveID");
add_system_value(SYSTEM_VALUE_INVOCATION_ID, int_t, GLSL_PRECISION_HIGH,
"gl_InvocationID");
add_system_value(SYSTEM_VALUE_VERTICES_IN, int_t, GLSL_PRECISION_HIGH,
"gl_PatchVerticesIn");
add_output(VARYING_SLOT_TESS_LEVEL_OUTER, array(float_t, 4),
GLSL_PRECISION_HIGH, "gl_TessLevelOuter")->data.patch = 1;
add_output(VARYING_SLOT_TESS_LEVEL_INNER, array(float_t, 2),
GLSL_PRECISION_HIGH, "gl_TessLevelInner")->data.patch = 1;
/* XXX What to do if multiple are flipped on? */
int bbox_slot = state->ctx->Const.NoPrimitiveBoundingBoxOutput ? -1 :
VARYING_SLOT_BOUNDING_BOX0;
if (state->EXT_primitive_bounding_box_enable)
add_output(bbox_slot, array(vec4_t, 2), "gl_BoundingBoxEXT")
->data.patch = 1;
if (state->OES_primitive_bounding_box_enable) {
add_output(bbox_slot, array(vec4_t, 2), GLSL_PRECISION_HIGH,
"gl_BoundingBoxOES")->data.patch = 1;
}
if (state->is_version(0, 320) || state->ARB_ES3_2_compatibility_enable) {
add_output(bbox_slot, array(vec4_t, 2), GLSL_PRECISION_HIGH,
"gl_BoundingBox")->data.patch = 1;
}
/* NOTE: These are completely pointless. Writing these will never go
* anywhere. But the specs demands it. So we add them with a slot of -1,
* which makes the data go nowhere.
*/
if (state->NV_viewport_array2_enable) {
add_output(-1, int_t, "gl_Layer");
add_output(-1, int_t, "gl_ViewportIndex");
add_output(-1, array(int_t, 1), "gl_ViewportMask");
}
}
/**
* Generate variables which only exist in tessellation evaluation shaders.
*/
void
builtin_variable_generator::generate_tes_special_vars()
{
ir_variable *var;
add_system_value(SYSTEM_VALUE_PRIMITIVE_ID, int_t, GLSL_PRECISION_HIGH,
"gl_PrimitiveID");
add_system_value(SYSTEM_VALUE_VERTICES_IN, int_t, GLSL_PRECISION_HIGH,
"gl_PatchVerticesIn");
add_system_value(SYSTEM_VALUE_TESS_COORD, vec3_t, GLSL_PRECISION_HIGH,
"gl_TessCoord");
if (this->state->ctx->Const.GLSLTessLevelsAsInputs) {
add_input(VARYING_SLOT_TESS_LEVEL_OUTER, array(float_t, 4),
GLSL_PRECISION_HIGH, "gl_TessLevelOuter")->data.patch = 1;
add_input(VARYING_SLOT_TESS_LEVEL_INNER, array(float_t, 2),
GLSL_PRECISION_HIGH, "gl_TessLevelInner")->data.patch = 1;
} else {
add_system_value(SYSTEM_VALUE_TESS_LEVEL_OUTER, array(float_t, 4),
GLSL_PRECISION_HIGH, "gl_TessLevelOuter");
add_system_value(SYSTEM_VALUE_TESS_LEVEL_INNER, array(float_t, 2),
GLSL_PRECISION_HIGH, "gl_TessLevelInner");
}
if (state->ARB_shader_viewport_layer_array_enable ||
state->NV_viewport_array2_enable) {
var = add_output(VARYING_SLOT_LAYER, int_t, "gl_Layer");
var->data.interpolation = INTERP_MODE_FLAT;
var = add_output(VARYING_SLOT_VIEWPORT, int_t, "gl_ViewportIndex");
var->data.interpolation = INTERP_MODE_FLAT;
}
if (state->NV_viewport_array2_enable) {
var = add_output(VARYING_SLOT_VIEWPORT_MASK, array(int_t, 1),
"gl_ViewportMask");
var->data.interpolation = INTERP_MODE_FLAT;
}
}
/**
* Generate variables which only exist in geometry shaders.
*/
void
builtin_variable_generator::generate_gs_special_vars()
{
ir_variable *var;
var = add_output(VARYING_SLOT_LAYER, int_t, GLSL_PRECISION_HIGH, "gl_Layer");
var->data.interpolation = INTERP_MODE_FLAT;
if (state->is_version(410, 0) || state->ARB_viewport_array_enable ||
state->OES_viewport_array_enable) {
var = add_output(VARYING_SLOT_VIEWPORT, int_t, GLSL_PRECISION_HIGH,
"gl_ViewportIndex");
var->data.interpolation = INTERP_MODE_FLAT;
}
if (state->NV_viewport_array2_enable) {
var = add_output(VARYING_SLOT_VIEWPORT_MASK, array(int_t, 1),
"gl_ViewportMask");
var->data.interpolation = INTERP_MODE_FLAT;
}
if (state->is_version(400, 320) || state->ARB_gpu_shader5_enable ||
state->OES_geometry_shader_enable || state->EXT_geometry_shader_enable) {
add_system_value(SYSTEM_VALUE_INVOCATION_ID, int_t, GLSL_PRECISION_HIGH,
"gl_InvocationID");
}
/* Although gl_PrimitiveID appears in tessellation control and tessellation
* evaluation shaders, it has a different function there than it has in
* geometry shaders, so we treat it (and its counterpart gl_PrimitiveIDIn)
* as special geometry shader variables.
*
* Note that although the general convention of suffixing geometry shader
* input varyings with "In" was not adopted into GLSL 1.50, it is used in
* the specific case of gl_PrimitiveIDIn. So we don't need to treat
* gl_PrimitiveIDIn as an {ARB,EXT}_geometry_shader4-only variable.
*/
var = add_input(VARYING_SLOT_PRIMITIVE_ID, int_t, GLSL_PRECISION_HIGH,
"gl_PrimitiveIDIn");
var->data.interpolation = INTERP_MODE_FLAT;
var = add_output(VARYING_SLOT_PRIMITIVE_ID, int_t, GLSL_PRECISION_HIGH,
"gl_PrimitiveID");
var->data.interpolation = INTERP_MODE_FLAT;
}
/**
* Generate variables which only exist in fragment shaders.
*/
void
builtin_variable_generator::generate_fs_special_vars()
{
ir_variable *var;
int frag_coord_precision = (state->is_version(0, 300) ?
GLSL_PRECISION_HIGH :
GLSL_PRECISION_MEDIUM);
if (this->state->ctx->Const.GLSLFragCoordIsSysVal) {
add_system_value(SYSTEM_VALUE_FRAG_COORD, vec4_t, frag_coord_precision,
"gl_FragCoord");
} else {
add_input(VARYING_SLOT_POS, vec4_t, frag_coord_precision, "gl_FragCoord");
}
if (this->state->ctx->Const.GLSLFrontFacingIsSysVal) {
var = add_system_value(SYSTEM_VALUE_FRONT_FACE, bool_t, "gl_FrontFacing");
var->data.interpolation = INTERP_MODE_FLAT;
} else {
var = add_input(VARYING_SLOT_FACE, bool_t, "gl_FrontFacing");
var->data.interpolation = INTERP_MODE_FLAT;
}
if (state->is_version(120, 100)) {
if (this->state->ctx->Const.GLSLPointCoordIsSysVal)
add_system_value(SYSTEM_VALUE_POINT_COORD, vec2_t,
GLSL_PRECISION_MEDIUM, "gl_PointCoord");
else
add_input(VARYING_SLOT_PNTC, vec2_t, GLSL_PRECISION_MEDIUM,
"gl_PointCoord");
}
if (state->has_geometry_shader() || state->EXT_gpu_shader4_enable) {
var = add_input(VARYING_SLOT_PRIMITIVE_ID, int_t, GLSL_PRECISION_HIGH,
"gl_PrimitiveID");
var->data.interpolation = INTERP_MODE_FLAT;
}
/* gl_FragColor and gl_FragData were deprecated starting in desktop GLSL
* 1.30, and were relegated to the compatibility profile in GLSL 4.20.
* They were removed from GLSL ES 3.00.
*/
if (compatibility || !state->is_version(420, 300)) {
add_output(FRAG_RESULT_COLOR, vec4_t, GLSL_PRECISION_MEDIUM,
"gl_FragColor");
add_output(FRAG_RESULT_DATA0,
array(vec4_t, state->Const.MaxDrawBuffers),
GLSL_PRECISION_MEDIUM,
"gl_FragData");
}
if (state->has_framebuffer_fetch() && !state->is_version(130, 300)) {
ir_variable *const var =
add_output(FRAG_RESULT_DATA0,
array(vec4_t, state->Const.MaxDrawBuffers),
"gl_LastFragData");
var->data.precision = GLSL_PRECISION_MEDIUM;
var->data.read_only = 1;
var->data.fb_fetch_output = 1;
var->data.memory_coherent = 1;
}
if (state->es_shader && state->language_version == 100 && state->EXT_blend_func_extended_enable) {
add_index_output(FRAG_RESULT_COLOR, 1, vec4_t,
GLSL_PRECISION_MEDIUM, "gl_SecondaryFragColorEXT");
add_index_output(FRAG_RESULT_DATA0, 1,
array(vec4_t, state->Const.MaxDualSourceDrawBuffers),
GLSL_PRECISION_MEDIUM, "gl_SecondaryFragDataEXT");
}
/* gl_FragDepth has always been in desktop GLSL, but did not appear in GLSL
* ES 1.00.
*/
if (state->is_version(110, 300)) {
add_output(FRAG_RESULT_DEPTH, float_t, GLSL_PRECISION_HIGH,
"gl_FragDepth");
}
if (state->EXT_frag_depth_enable)
add_output(FRAG_RESULT_DEPTH, float_t, "gl_FragDepthEXT");
if (state->ARB_shader_stencil_export_enable) {
ir_variable *const var =
add_output(FRAG_RESULT_STENCIL, int_t, "gl_FragStencilRefARB");
if (state->ARB_shader_stencil_export_warn)
var->enable_extension_warning("GL_ARB_shader_stencil_export");
}
if (state->AMD_shader_stencil_export_enable) {
ir_variable *const var =
add_output(FRAG_RESULT_STENCIL, int_t, "gl_FragStencilRefAMD");
if (state->AMD_shader_stencil_export_warn)
var->enable_extension_warning("GL_AMD_shader_stencil_export");
}
if (state->is_version(400, 320) ||
state->ARB_sample_shading_enable ||
state->OES_sample_variables_enable) {
add_system_value(SYSTEM_VALUE_SAMPLE_ID, int_t, GLSL_PRECISION_LOW,
"gl_SampleID");
add_system_value(SYSTEM_VALUE_SAMPLE_POS, vec2_t, GLSL_PRECISION_MEDIUM,
"gl_SamplePosition");
/* From the ARB_sample_shading specification:
* "The number of elements in the array is ceil(<s>/32), where
* <s> is the maximum number of color samples supported by the
* implementation."
* Since no drivers expose more than 32x MSAA, we can simply set
* the array size to 1 rather than computing it.
*/
add_output(FRAG_RESULT_SAMPLE_MASK, array(int_t, 1),
GLSL_PRECISION_HIGH, "gl_SampleMask");
}
if (state->is_version(400, 320) ||
state->ARB_gpu_shader5_enable ||
state->OES_sample_variables_enable) {
add_system_value(SYSTEM_VALUE_SAMPLE_MASK_IN, array(int_t, 1),
GLSL_PRECISION_HIGH, "gl_SampleMaskIn");
}
if (state->is_version(430, 320) ||
state->ARB_fragment_layer_viewport_enable ||
state->OES_geometry_shader_enable ||
state->EXT_geometry_shader_enable) {
add_varying(VARYING_SLOT_LAYER, int_t, GLSL_PRECISION_HIGH,
"gl_Layer", INTERP_MODE_FLAT);
}
if (state->is_version(430, 0) ||
state->ARB_fragment_layer_viewport_enable ||
state->OES_viewport_array_enable) {
add_varying(VARYING_SLOT_VIEWPORT, int_t, "gl_ViewportIndex", INTERP_MODE_FLAT);
}
if (state->is_version(450, 310) || state->ARB_ES3_1_compatibility_enable)
add_system_value(SYSTEM_VALUE_HELPER_INVOCATION, bool_t, "gl_HelperInvocation");
}
/**
* Generate variables which only exist in compute shaders.
*/
void
builtin_variable_generator::generate_cs_special_vars()
{
add_system_value(SYSTEM_VALUE_LOCAL_INVOCATION_ID, uvec3_t,
"gl_LocalInvocationID");
add_system_value(SYSTEM_VALUE_WORKGROUP_ID, uvec3_t, "gl_WorkGroupID");
add_system_value(SYSTEM_VALUE_NUM_WORKGROUPS, uvec3_t, "gl_NumWorkGroups");
if (state->ARB_compute_variable_group_size_enable) {
add_system_value(SYSTEM_VALUE_WORKGROUP_SIZE,
uvec3_t, "gl_LocalGroupSizeARB");
}
add_system_value(SYSTEM_VALUE_GLOBAL_INVOCATION_ID,
uvec3_t, "gl_GlobalInvocationID");
add_system_value(SYSTEM_VALUE_LOCAL_INVOCATION_INDEX,
uint_t, "gl_LocalInvocationIndex");
}
/**
* Add a single "varying" variable. The variable's type and direction (input
* or output) are adjusted as appropriate for the type of shader being
* compiled.
*/
void
builtin_variable_generator::add_varying(int slot, const glsl_type *type,
int precision, const char *name,
enum glsl_interp_mode interp)
{
switch (state->stage) {
case MESA_SHADER_TESS_CTRL:
case MESA_SHADER_TESS_EVAL:
case MESA_SHADER_GEOMETRY:
this->per_vertex_in.add_field(slot, type, precision, name, interp);
FALLTHROUGH;
case MESA_SHADER_VERTEX:
this->per_vertex_out.add_field(slot, type, precision, name, interp);
break;
case MESA_SHADER_FRAGMENT:
add_input(slot, type, precision, name, interp);
break;
case MESA_SHADER_COMPUTE:
/* Compute shaders don't have varyings. */
break;
default:
break;
}
}
/**
* Generate variables that are used to communicate data from one shader stage
* to the next ("varyings").
*/
void
builtin_variable_generator::generate_varyings()
{
struct gl_shader_compiler_options *options =
&state->ctx->Const.ShaderCompilerOptions[state->stage];
/* gl_Position and gl_PointSize are not visible from fragment shaders. */
if (state->stage != MESA_SHADER_FRAGMENT) {
add_varying(VARYING_SLOT_POS, vec4_t, GLSL_PRECISION_HIGH, "gl_Position");
if (!state->es_shader ||
state->stage == MESA_SHADER_VERTEX ||
(state->stage == MESA_SHADER_GEOMETRY &&
(state->OES_geometry_point_size_enable ||
state->EXT_geometry_point_size_enable)) ||
((state->stage == MESA_SHADER_TESS_CTRL ||
state->stage == MESA_SHADER_TESS_EVAL) &&
(state->OES_tessellation_point_size_enable ||
state->EXT_tessellation_point_size_enable))) {
add_varying(VARYING_SLOT_PSIZ,
float_t,
state->is_version(0, 300) ?
GLSL_PRECISION_HIGH :
GLSL_PRECISION_MEDIUM,
"gl_PointSize");
}
if (state->stage == MESA_SHADER_VERTEX) {
if (state->AMD_vertex_shader_viewport_index_enable ||
state->ARB_shader_viewport_layer_array_enable ||
state->NV_viewport_array2_enable) {
add_varying(VARYING_SLOT_VIEWPORT, int_t, "gl_ViewportIndex", INTERP_MODE_FLAT);
}
if (state->AMD_vertex_shader_layer_enable ||
state->ARB_shader_viewport_layer_array_enable ||
state->NV_viewport_array2_enable) {
add_varying(VARYING_SLOT_LAYER, int_t, GLSL_PRECISION_HIGH,
"gl_Layer", INTERP_MODE_FLAT);
}
/* From the NV_viewport_array2 specification:
*
* "The variable gl_ViewportMask[] is available as an output variable
* in the VTG languages. The array has ceil(v/32) elements where v is
* the maximum number of viewports supported by the implementation."
*
* Since no drivers expose more than 16 viewports, we can simply set the
* array size to 1 rather than computing it and dealing with varying
* slot complication.
*/
if (state->NV_viewport_array2_enable)
add_varying(VARYING_SLOT_VIEWPORT_MASK, array(int_t, 1),
"gl_ViewportMask", INTERP_MODE_FLAT);
}
}
if (state->has_clip_distance()) {
add_varying(VARYING_SLOT_CLIP_DIST0, array(float_t, 0),
GLSL_PRECISION_HIGH, "gl_ClipDistance");
}
if (state->has_cull_distance()) {
add_varying(VARYING_SLOT_CULL_DIST0, array(float_t, 0),
GLSL_PRECISION_HIGH, "gl_CullDistance");
}
if (compatibility) {
add_varying(VARYING_SLOT_TEX0, array(vec4_t, 0), "gl_TexCoord");
add_varying(VARYING_SLOT_FOGC, float_t, "gl_FogFragCoord");
if (state->stage == MESA_SHADER_FRAGMENT) {
add_varying(VARYING_SLOT_COL0, vec4_t, "gl_Color");
add_varying(VARYING_SLOT_COL1, vec4_t, "gl_SecondaryColor");
} else {
add_varying(VARYING_SLOT_CLIP_VERTEX, vec4_t, "gl_ClipVertex");
add_varying(VARYING_SLOT_COL0, vec4_t, "gl_FrontColor");
add_varying(VARYING_SLOT_BFC0, vec4_t, "gl_BackColor");
add_varying(VARYING_SLOT_COL1, vec4_t, "gl_FrontSecondaryColor");
add_varying(VARYING_SLOT_BFC1, vec4_t, "gl_BackSecondaryColor");
}
}
/* Section 7.1 (Built-In Language Variables) of the GLSL 4.00 spec
* says:
*
* "In the tessellation control language, built-in variables are
* intrinsically declared as:
*
* in gl_PerVertex {
* vec4 gl_Position;
* float gl_PointSize;
* float gl_ClipDistance[];
* } gl_in[gl_MaxPatchVertices];"
*/
if (state->stage == MESA_SHADER_TESS_CTRL ||
state->stage == MESA_SHADER_TESS_EVAL) {
const glsl_type *per_vertex_in_type =
this->per_vertex_in.construct_interface_instance();
add_variable("gl_in", array(per_vertex_in_type, state->Const.MaxPatchVertices),
GLSL_PRECISION_NONE, ir_var_shader_in, -1);
}
if (state->stage == MESA_SHADER_GEOMETRY) {
const glsl_type *per_vertex_in_type =
this->per_vertex_in.construct_interface_instance();
add_variable("gl_in", array(per_vertex_in_type, 0),
GLSL_PRECISION_NONE, ir_var_shader_in, -1);
}
if (state->stage == MESA_SHADER_TESS_CTRL) {
const glsl_type *per_vertex_out_type =
this->per_vertex_out.construct_interface_instance();
add_variable("gl_out", array(per_vertex_out_type, 0),
GLSL_PRECISION_NONE, ir_var_shader_out, -1);
}
if (state->stage == MESA_SHADER_VERTEX ||
state->stage == MESA_SHADER_TESS_EVAL ||
state->stage == MESA_SHADER_GEOMETRY) {
const glsl_type *per_vertex_out_type =
this->per_vertex_out.construct_interface_instance();
const glsl_struct_field *fields = per_vertex_out_type->fields.structure;
for (unsigned i = 0; i < per_vertex_out_type->length; i++) {
ir_variable *var =
add_variable(fields[i].name, fields[i].type, fields[i].precision,
ir_var_shader_out, fields[i].location);
var->data.interpolation = fields[i].interpolation;
var->data.centroid = fields[i].centroid;
var->data.sample = fields[i].sample;
var->data.patch = fields[i].patch;
var->init_interface_type(per_vertex_out_type);
var->data.invariant = fields[i].location == VARYING_SLOT_POS &&
options->PositionAlwaysInvariant;
var->data.precise = fields[i].location == VARYING_SLOT_POS &&
options->PositionAlwaysPrecise;
}
}
}
}; /* Anonymous namespace */
void
_mesa_glsl_initialize_variables(exec_list *instructions,
struct _mesa_glsl_parse_state *state)
{
builtin_variable_generator gen(instructions, state);
gen.generate_constants();
gen.generate_uniforms();
gen.generate_special_vars();
gen.generate_varyings();
switch (state->stage) {
case MESA_SHADER_VERTEX:
gen.generate_vs_special_vars();
break;
case MESA_SHADER_TESS_CTRL:
gen.generate_tcs_special_vars();
break;
case MESA_SHADER_TESS_EVAL:
gen.generate_tes_special_vars();
break;
case MESA_SHADER_GEOMETRY:
gen.generate_gs_special_vars();
break;
case MESA_SHADER_FRAGMENT:
gen.generate_fs_special_vars();
break;
case MESA_SHADER_COMPUTE:
gen.generate_cs_special_vars();
break;
default:
break;
}
}
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