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22d3ef2df1f4fd6c4a0aaf17996fdcd9b70547cb
third_party_mesa3d/src/glsl/builtin_variables.cpp
Paul Berry 22d3ef2df1 glsl: Make accessor functions for ir_variable::interface_type. 
In a future patch, this will allow us to enforce invariants when the
interface type is updated.

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
2013-10-09 16:49:26 -07:00

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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.
*/
#include "ir.h"
#include "glsl_parser_extras.h"
#include "glsl_symbol_table.h"
#include "main/core.h"
#include "main/uniforms.h"
#include "program/prog_parameter.h"
#include "program/prog_statevars.h"
#include "program/prog_instruction.h"
static 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 struct gl_builtin_uniform_element gl_ClipPlane_elements[] = {
{NULL, {STATE_CLIPPLANE, 0, 0}, SWIZZLE_XYZW}
};
static 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 struct gl_builtin_uniform_element gl_FrontMaterial_elements[] = {
{"emission", {STATE_MATERIAL, 0, STATE_EMISSION}, SWIZZLE_XYZW},
{"ambient", {STATE_MATERIAL, 0, STATE_AMBIENT}, SWIZZLE_XYZW},
{"diffuse", {STATE_MATERIAL, 0, STATE_DIFFUSE}, SWIZZLE_XYZW},
{"specular", {STATE_MATERIAL, 0, STATE_SPECULAR}, SWIZZLE_XYZW},
{"shininess", {STATE_MATERIAL, 0, STATE_SHININESS}, SWIZZLE_XXXX},
};
static struct gl_builtin_uniform_element gl_BackMaterial_elements[] = {
{"emission", {STATE_MATERIAL, 1, STATE_EMISSION}, SWIZZLE_XYZW},
{"ambient", {STATE_MATERIAL, 1, STATE_AMBIENT}, SWIZZLE_XYZW},
{"diffuse", {STATE_MATERIAL, 1, STATE_DIFFUSE}, SWIZZLE_XYZW},
{"specular", {STATE_MATERIAL, 1, STATE_SPECULAR}, SWIZZLE_XYZW},
{"shininess", {STATE_MATERIAL, 1, STATE_SHININESS}, SWIZZLE_XXXX},
};
static 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},
{"spotCutoff", {STATE_LIGHT, 0, STATE_SPOT_CUTOFF}, SWIZZLE_XXXX},
{"spotExponent", {STATE_LIGHT, 0, STATE_ATTENUATION}, 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},
};
static struct gl_builtin_uniform_element gl_LightModel_elements[] = {
{"ambient", {STATE_LIGHTMODEL_AMBIENT, 0}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_FrontLightModelProduct_elements[] = {
{"sceneColor", {STATE_LIGHTMODEL_SCENECOLOR, 0}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_BackLightModelProduct_elements[] = {
{"sceneColor", {STATE_LIGHTMODEL_SCENECOLOR, 1}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_FrontLightProduct_elements[] = {
{"ambient", {STATE_LIGHTPROD, 0, 0, STATE_AMBIENT}, SWIZZLE_XYZW},
{"diffuse", {STATE_LIGHTPROD, 0, 0, STATE_DIFFUSE}, SWIZZLE_XYZW},
{"specular", {STATE_LIGHTPROD, 0, 0, STATE_SPECULAR}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_BackLightProduct_elements[] = {
{"ambient", {STATE_LIGHTPROD, 0, 1, STATE_AMBIENT}, SWIZZLE_XYZW},
{"diffuse", {STATE_LIGHTPROD, 0, 1, STATE_DIFFUSE}, SWIZZLE_XYZW},
{"specular", {STATE_LIGHTPROD, 0, 1, STATE_SPECULAR}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_TextureEnvColor_elements[] = {
{NULL, {STATE_TEXENV_COLOR, 0}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_EyePlaneS_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_S}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_EyePlaneT_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_T}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_EyePlaneR_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_R}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_EyePlaneQ_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_EYE_Q}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_ObjectPlaneS_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_S}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_ObjectPlaneT_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_T}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_ObjectPlaneR_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_R}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_ObjectPlaneQ_elements[] = {
{NULL, {STATE_TEXGEN, 0, STATE_TEXGEN_OBJECT_Q}, SWIZZLE_XYZW},
};
static 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 struct gl_builtin_uniform_element gl_NormalScale_elements[] = {
{NULL, {STATE_NORMAL_SCALE}, SWIZZLE_XXXX},
};
static struct gl_builtin_uniform_element gl_BumpRotMatrix0MESA_elements[] = {
{NULL, {STATE_INTERNAL, STATE_ROT_MATRIX_0}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_BumpRotMatrix1MESA_elements[] = {
{NULL, {STATE_INTERNAL, STATE_ROT_MATRIX_1}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_FogParamsOptimizedMESA_elements[] = {
{NULL, {STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_CurrentAttribVertMESA_elements[] = {
{NULL, {STATE_INTERNAL, STATE_CURRENT_ATTRIB, 0}, SWIZZLE_XYZW},
};
static struct gl_builtin_uniform_element gl_CurrentAttribFragMESA_elements[] = {
{NULL, {STATE_INTERNAL, STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED, 0}, SWIZZLE_XYZW},
};
#define MATRIX(name, statevar, modifier) \
static struct gl_builtin_uniform_element name ## _elements[] = { \
{ NULL, { statevar, 0, 0, 0, modifier}, SWIZZLE_XYZW }, \
{ NULL, { statevar, 0, 1, 1, modifier}, SWIZZLE_XYZW }, \
{ NULL, { statevar, 0, 2, 2, modifier}, SWIZZLE_XYZW }, \
{ NULL, { statevar, 0, 3, 3, modifier}, SWIZZLE_XYZW }, \
}
MATRIX(gl_ModelViewMatrix,
STATE_MODELVIEW_MATRIX, STATE_MATRIX_TRANSPOSE);
MATRIX(gl_ModelViewMatrixInverse,
STATE_MODELVIEW_MATRIX, STATE_MATRIX_INVTRANS);
MATRIX(gl_ModelViewMatrixTranspose,
STATE_MODELVIEW_MATRIX, 0);
MATRIX(gl_ModelViewMatrixInverseTranspose,
STATE_MODELVIEW_MATRIX, STATE_MATRIX_INVERSE);
MATRIX(gl_ProjectionMatrix,
STATE_PROJECTION_MATRIX, STATE_MATRIX_TRANSPOSE);
MATRIX(gl_ProjectionMatrixInverse,
STATE_PROJECTION_MATRIX, STATE_MATRIX_INVTRANS);
MATRIX(gl_ProjectionMatrixTranspose,
STATE_PROJECTION_MATRIX, 0);
MATRIX(gl_ProjectionMatrixInverseTranspose,
STATE_PROJECTION_MATRIX, STATE_MATRIX_INVERSE);
MATRIX(gl_ModelViewProjectionMatrix,
STATE_MVP_MATRIX, STATE_MATRIX_TRANSPOSE);
MATRIX(gl_ModelViewProjectionMatrixInverse,
STATE_MVP_MATRIX, STATE_MATRIX_INVTRANS);
MATRIX(gl_ModelViewProjectionMatrixTranspose,
STATE_MVP_MATRIX, 0);
MATRIX(gl_ModelViewProjectionMatrixInverseTranspose,
STATE_MVP_MATRIX, STATE_MATRIX_INVERSE);
MATRIX(gl_TextureMatrix,
STATE_TEXTURE_MATRIX, STATE_MATRIX_TRANSPOSE);
MATRIX(gl_TextureMatrixInverse,
STATE_TEXTURE_MATRIX, STATE_MATRIX_INVTRANS);
MATRIX(gl_TextureMatrixTranspose,
STATE_TEXTURE_MATRIX, 0);
MATRIX(gl_TextureMatrixInverseTranspose,
STATE_TEXTURE_MATRIX, STATE_MATRIX_INVERSE);
static struct gl_builtin_uniform_element gl_NormalMatrix_elements[] = {
{ NULL, { STATE_MODELVIEW_MATRIX, 0, 0, 0, STATE_MATRIX_INVERSE},
MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z) },
{ NULL, { STATE_MODELVIEW_MATRIX, 0, 1, 1, STATE_MATRIX_INVERSE},
MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z) },
{ NULL, { STATE_MODELVIEW_MATRIX, 0, 2, 2, STATE_MATRIX_INVERSE},
MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z) },
};
#undef MATRIX
#define STATEVAR(name) {#name, name ## _elements, Elements(name ## _elements)}
static const struct gl_builtin_uniform_desc _mesa_builtin_uniform_desc[] = {
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_BumpRotMatrix0MESA),
STATEVAR(gl_BumpRotMatrix1MESA),
STATEVAR(gl_FogParamsOptimizedMESA),
STATEVAR(gl_CurrentAttribVertMESA),
STATEVAR(gl_CurrentAttribFragMESA),
{NULL, NULL, 0}
};
namespace {
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_vs_special_vars();
void generate_gs_special_vars();
void generate_fs_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, const char *name)
{
return add_variable(name, type, ir_var_shader_in, slot);
}
ir_variable *add_output(int slot, const glsl_type *type, const char *name)
{
return add_variable(name, type, ir_var_shader_out, slot);
}
ir_variable *add_system_value(int slot, const glsl_type *type,
const char *name)
{
return add_variable(name, type, ir_var_system_value, slot);
}
ir_variable *add_variable(const char *name, const glsl_type *type,
enum ir_variable_mode mode, int slot);
ir_variable *add_uniform(const glsl_type *type, const char *name);
ir_variable *add_const(const char *name, int value);
void add_varying(int slot, const glsl_type *type, const char *name,
const char *name_as_gs_input);
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 float_t;
const glsl_type * const vec2_t;
const glsl_type * const vec3_t;
const glsl_type * const vec4_t;
const glsl_type * const mat3_t;
const glsl_type * const mat4_t;
/**
* Array where the contents of the gl_PerVertex interface instance are
* accumulated.
*/
glsl_struct_field per_vertex_fields[10];
/**
* Number of elements of per_vertex_fields which have been populated.
*/
unsigned num_per_vertex_fields;
};
builtin_variable_generator::builtin_variable_generator(
exec_list *instructions, struct _mesa_glsl_parse_state *state)
: instructions(instructions), state(state), symtab(state->symbols),
compatibility(!state->is_version(140, 100)),
bool_t(glsl_type::bool_type), int_t(glsl_type::int_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),
mat3_t(glsl_type::mat3_type), mat4_t(glsl_type::mat4_type),
num_per_vertex_fields(0)
{
}
ir_variable *
builtin_variable_generator::add_variable(const char *name,
const glsl_type *type,
enum ir_variable_mode mode, int slot)
{
ir_variable *var = new(symtab) ir_variable(type, name, mode);
switch (var->mode) {
case ir_var_auto:
case ir_var_shader_in:
case ir_var_uniform:
case ir_var_system_value:
var->read_only = true;
break;
case ir_var_shader_out:
break;
default:
/* The only variables that are added using this function should be
* uniforms, shader inputs, and shader outputs, constants (which use
* ir_var_auto), and system values.
*/
assert(0);
break;
}
var->location = slot;
var->explicit_location = (slot >= 0);
var->explicit_index = 0;
/* 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_uniform(const glsl_type *type,
const char *name)
{
ir_variable *const uni = add_variable(name, type, ir_var_uniform, -1);
unsigned i;
for (i = 0; _mesa_builtin_uniform_desc[i].name != NULL; i++) {
if (strcmp(_mesa_builtin_uniform_desc[i].name, name) == 0) {
break;
}
}
assert(_mesa_builtin_uniform_desc[i].name != NULL);
const struct gl_builtin_uniform_desc* const statevar =
&_mesa_builtin_uniform_desc[i];
const unsigned array_count = type->is_array() ? type->length : 1;
uni->num_state_slots = array_count * statevar->num_elements;
ir_state_slot *slots =
ralloc_array(uni, ir_state_slot, uni->num_state_slots);
uni->state_slots = slots;
for (unsigned a = 0; a < array_count; a++) {
for (unsigned j = 0; j < statevar->num_elements; j++) {
struct gl_builtin_uniform_element *element = &statevar->elements[j];
memcpy(slots->tokens, element->tokens, sizeof(element->tokens));
if (type->is_array()) {
if (strcmp(name, "gl_CurrentAttribVertMESA") == 0 ||
strcmp(name, "gl_CurrentAttribFragMESA") == 0) {
slots->tokens[2] = a;
} else {
slots->tokens[1] = a;
}
}
slots->swizzle = element->swizzle;
slots++;
}
}
return uni;
}
ir_variable *
builtin_variable_generator::add_const(const char *name, int value)
{
ir_variable *const var = add_variable(name, glsl_type::int_type,
ir_var_auto, -1);
var->constant_value = new(var) ir_constant(value);
var->constant_initializer = new(var) ir_constant(value);
var->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".
*/
if (state->es_shader) {
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.VertexProgram.MaxOutputComponents / 4);
add_const("gl_MaxFragmentInputVectors",
state->ctx->Const.FragmentProgram.MaxInputComponents / 4);
} else {
add_const("gl_MaxVaryingVectors",
state->ctx->Const.MaxVarying);
}
} else {
add_const("gl_MaxVertexUniformComponents",
state->Const.MaxVertexUniformComponents);
/* Note: gl_MaxVaryingFloats was deprecated in GLSL 1.30+, but not
* removed
*/
add_const("gl_MaxVaryingFloats", state->ctx->Const.MaxVarying * 4);
add_const("gl_MaxFragmentUniformComponents",
state->Const.MaxFragmentUniformComponents);
}
/* 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->is_version(130, 0)) {
add_const("gl_MaxClipDistances", state->Const.MaxClipPlanes);
add_const("gl_MaxVaryingComponents", state->ctx->Const.MaxVarying * 4);
}
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);
}
}
/**
* Generate uniform variables (which exist in all types of shaders).
*/
void
builtin_variable_generator::generate_uniforms()
{
add_uniform(type("gl_DepthRangeParameters"), "gl_DepthRange");
add_uniform(array(vec4_t, VERT_ATTRIB_MAX), "gl_CurrentAttribVertMESA");
add_uniform(array(vec4_t, VARYING_SLOT_MAX), "gl_CurrentAttribFragMESA");
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(vec2_t, "gl_BumpRotMatrix0MESA");
add_uniform(vec2_t, "gl_BumpRotMatrix1MESA");
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 variables which only exist in vertex shaders.
*/
void
builtin_variable_generator::generate_vs_special_vars()
{
if (state->is_version(130, 300))
add_system_value(SYSTEM_VALUE_VERTEX_ID, int_t, "gl_VertexID");
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))
add_system_value(SYSTEM_VALUE_INSTANCE_ID, int_t, "gl_InstanceID");
if (state->AMD_vertex_shader_layer_enable)
add_output(VARYING_SLOT_LAYER, int_t, "gl_Layer");
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 geometry shaders.
*/
void
builtin_variable_generator::generate_gs_special_vars()
{
add_output(VARYING_SLOT_LAYER, int_t, "gl_Layer");
/* 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.
*/
ir_variable *var;
var = add_input(VARYING_SLOT_PRIMITIVE_ID, int_t, "gl_PrimitiveIDIn");
var->interpolation = INTERP_QUALIFIER_FLAT;
var = add_output(VARYING_SLOT_PRIMITIVE_ID, int_t, "gl_PrimitiveID");
var->interpolation = INTERP_QUALIFIER_FLAT;
}
/**
* Generate variables which only exist in fragment shaders.
*/
void
builtin_variable_generator::generate_fs_special_vars()
{
add_input(VARYING_SLOT_POS, vec4_t, "gl_FragCoord");
add_input(VARYING_SLOT_FACE, bool_t, "gl_FrontFacing");
if (state->is_version(120, 100))
add_input(VARYING_SLOT_PNTC, vec2_t, "gl_PointCoord");
if (state->is_version(150, 0)) {
ir_variable *var =
add_input(VARYING_SLOT_PRIMITIVE_ID, int_t, "gl_PrimitiveID");
var->interpolation = INTERP_QUALIFIER_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, "gl_FragColor");
add_output(FRAG_RESULT_DATA0,
array(vec4_t, state->Const.MaxDrawBuffers), "gl_FragData");
}
/* 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, "gl_FragDepth");
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->warn_extension = "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->warn_extension = "GL_AMD_shader_stencil_export";
}
}
/**
* 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. For geometry shaders using {ARB,EXT}_geometry_shader4,
* name_as_gs_input is used for the input (to avoid ambiguity).
*/
void
builtin_variable_generator::add_varying(int slot, const glsl_type *type,
const char *name,
const char *name_as_gs_input)
{
switch (state->target) {
case geometry_shader:
assert(this->num_per_vertex_fields <
ARRAY_SIZE(this->per_vertex_fields));
this->per_vertex_fields[this->num_per_vertex_fields].type = type;
this->per_vertex_fields[this->num_per_vertex_fields].name = name;
this->per_vertex_fields[this->num_per_vertex_fields].row_major = false;
this->per_vertex_fields[this->num_per_vertex_fields].location = slot;
this->num_per_vertex_fields++;
/* FALLTHROUGH */
case vertex_shader:
add_output(slot, type, name);
break;
case fragment_shader:
add_input(slot, type, name);
break;
}
}
/**
* Generate variables that are used to communicate data from one shader stage
* to the next ("varyings").
*/
void
builtin_variable_generator::generate_varyings()
{
#define ADD_VARYING(loc, type, name) \
add_varying(loc, type, name, name "In")
/* gl_Position and gl_PointSize are not visible from fragment shaders. */
if (state->target != fragment_shader) {
ADD_VARYING(VARYING_SLOT_POS, vec4_t, "gl_Position");
ADD_VARYING(VARYING_SLOT_PSIZ, float_t, "gl_PointSize");
}
if (state->is_version(130, 0)) {
ADD_VARYING(VARYING_SLOT_CLIP_DIST0, array(float_t, 0),
"gl_ClipDistance");
}
if (compatibility) {
ADD_VARYING(VARYING_SLOT_TEX0, array(vec4_t, 0), "gl_TexCoord");
ADD_VARYING(VARYING_SLOT_FOGC, float_t, "gl_FogFragCoord");
if (state->target == fragment_shader) {
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");
}
}
if (state->target == geometry_shader) {
const glsl_type *per_vertex_type =
glsl_type::get_interface_instance(this->per_vertex_fields,
this->num_per_vertex_fields,
GLSL_INTERFACE_PACKING_STD140,
"gl_in");
ir_variable *var = add_variable("gl_in", array(per_vertex_type, 0),
ir_var_shader_in, 0);
var->init_interface_type(per_vertex_type);
}
}
}; /* 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_varyings();
switch (state->target) {
case vertex_shader:
gen.generate_vs_special_vars();
break;
case geometry_shader:
gen.generate_gs_special_vars();
break;
case fragment_shader:
gen.generate_fs_special_vars();
break;
}
}
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