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glsl: add support for ARB_texture_multisample

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V2: - emit `sample` parameter properly for multisample texelFetch()
    - fix spurious whitespace change
    - introduce a new opcode ir_txf_ms rather than overloading the
      existing ir_txf further. This makes doing the right thing in
      the driver somewhat simpler.

V3: - fix weird whitespace

V4: - don't forget to include the new opcode in tex_opcode_strs[]
      (thanks Kenneth for spotting this)

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
[V2] Reviewed-by: Eric Anholt <eric@anholt.net>
[V2] Reviewed-by: Paul Berry <stereotype441@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Chris Forbes
2012-12-21 21:33:37 +13:00
parent 16af0aca09
commit ffb53b4f03
20 changed files with 153 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
src/glsl/builtin_types.h
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@@ -347,3 +347,22 @@ const glsl_type glsl_type::builtin_ARB_texture_cube_map_array_types[] = {
GLSL_SAMPLER_DIM_CUBE, 0, 1, GLSL_TYPE_UINT, "usamplerCubeArray"),
};
/*@}*/
/** \name Sampler types added by GL_ARB_texture_multisample
*/
/*@{*/
const glsl_type glsl_type::builtin_ARB_texture_multisample_types[] = {
glsl_type(GL_SAMPLER_2D_MULTISAMPLE,
GLSL_SAMPLER_DIM_MS, 0, 0, GLSL_TYPE_FLOAT, "sampler2DMS"),
glsl_type(GL_INT_SAMPLER_2D_MULTISAMPLE,
GLSL_SAMPLER_DIM_MS, 0, 0, GLSL_TYPE_INT, "isampler2DMS"),
glsl_type(GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE,
GLSL_SAMPLER_DIM_MS, 0, 0, GLSL_TYPE_UINT, "usampler2DMS"),
glsl_type(GL_SAMPLER_2D_MULTISAMPLE_ARRAY,
GLSL_SAMPLER_DIM_MS, 0, 1, GLSL_TYPE_FLOAT, "sampler2DMSArray"),
glsl_type(GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY,
GLSL_SAMPLER_DIM_MS, 0, 1, GLSL_TYPE_INT, "isampler2DMSArray"),
glsl_type(GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY,
GLSL_SAMPLER_DIM_MS, 0, 1, GLSL_TYPE_UINT, "usampler2DMSArray"),
};
/*@}*/

18
src/glsl/builtins/profiles/ARB_texture_multisample.glsl Normal file
View File

@@ -0,0 +1,18 @@
#version 130
#extension GL_ARB_texture_multisample : enable
ivec2 textureSize( sampler2DMS sampler);
ivec2 textureSize(isampler2DMS sampler);
ivec2 textureSize(usampler2DMS sampler);
ivec3 textureSize( sampler2DMSArray sampler);
ivec3 textureSize(isampler2DMSArray sampler);
ivec3 textureSize(usampler2DMSArray sampler);
vec4 texelFetch( sampler2DMS sampler, ivec2 P, int sample);
ivec4 texelFetch(isampler2DMS sampler, ivec2 P, int sample);
uvec4 texelFetch(usampler2DMS sampler, ivec2 P, int sample);
vec4 texelFetch( sampler2DMSArray sampler, ivec3 P, int sample);
ivec4 texelFetch(isampler2DMSArray sampler, ivec3 P, int sample);
uvec4 texelFetch(usampler2DMSArray sampler, ivec3 P, int sample);

1
src/glsl/builtins/tools/generate_builtins.py
View File

@@ -190,6 +190,7 @@ read_builtins(GLenum target, const char *protos, const char **functions, unsigne
st->ARB_shader_bit_encoding_enable = true;
st->ARB_texture_cube_map_array_enable = true;
st->ARB_shading_language_packing_enable = true;
st->ARB_texture_multisample_enable = true;
_mesa_glsl_initialize_types(st);
sh->ir = new(sh) exec_list;

28
src/glsl/builtins/tools/texture_builtins.py
View File

@@ -57,6 +57,12 @@ def get_txs_dim(sampler_type):
return 2
return get_coord_dim(sampler_type)
def has_lod(sampler_type):
if 'Buffer' in sampler_type: return False
if 'Rect' in sampler_type: return False
if 'MS' in sampler_type: return False
return True
def generate_sigs(g, tex_inst, sampler_type, variant = 0, unused_fields = 0):
coord_dim = get_coord_dim(sampler_type)
extra_dim = get_extra_dim(sampler_type, variant & Proj, unused_fields)
@@ -74,11 +80,13 @@ def generate_sigs(g, tex_inst, sampler_type, variant = 0, unused_fields = 0):
print " (parameters"
print " (declare (in) " + g + "sampler" + sampler_type + " sampler)",
if tex_inst != "txs":
print "\n (declare (in) " + vec_type("i" if tex_inst == "txf" else "", coord_dim + extra_dim) + " P)",
print "\n (declare (in) " + vec_type("i" if tex_inst in ['txf','txf_ms'] else "", coord_dim + extra_dim) + " P)",
if tex_inst == "txl":
print "\n (declare (in) float lod)",
elif ((tex_inst == "txf" or tex_inst == "txs") and "Buffer" not in sampler_type and "Rect" not in sampler_type):
elif tex_inst in ['txf', 'txs'] and has_lod(sampler_type):
print "\n (declare (in) int lod)",
elif tex_inst == "txf_ms":
print "\n (declare (in) int sample)",
elif tex_inst == "txd":
grad_type = vec_type("", sampler_dim)
print "\n (declare (in) " + grad_type + " dPdx)",
@@ -100,12 +108,14 @@ def generate_sigs(g, tex_inst, sampler_type, variant = 0, unused_fields = 0):
else:
print "(var_ref P)",
if tex_inst not in ['txf_ms', 'txs']:
# Coordinate offset
if variant & Offset:
print "(var_ref offset)",
else:
print "0",
if tex_inst != "txf" and tex_inst != "txs":
if tex_inst not in ['txf', 'txf_ms', 'txs']:
# Projective divisor
if variant & Proj:
print "(swiz " + "xyzw"[coord_dim + extra_dim-1] + " (var_ref P))",
@@ -125,11 +135,13 @@ def generate_sigs(g, tex_inst, sampler_type, variant = 0, unused_fields = 0):
# Bias/explicit LOD/gradient:
if tex_inst == "txb":
print "(var_ref bias)",
elif tex_inst == "txs" or tex_inst == "txf":
if "Rect" not in sampler_type and "Buffer" not in sampler_type:
elif tex_inst in ['txs', 'txf', 'txf_ms']:
if has_lod(sampler_type):
print "(var_ref lod)",
elif tex_inst == 'txf_ms':
print "(var_ref sample)",
else:
print "(constant int (0))"
print "(constant int (0))",
elif tex_inst == "txl":
print "(var_ref lod)",
elif tex_inst == "txd":
@@ -173,6 +185,8 @@ def generate_texture_functions(fs):
generate_fiu_sigs("txs", "Buffer")
generate_fiu_sigs("txs", "CubeArray")
generate_sigs("", "txs", "CubeArrayShadow")
generate_fiu_sigs("txs", "2DMS")
generate_fiu_sigs("txs", "2DMSArray")
end_function(fs, "textureSize")
start_function("texture")
@@ -283,6 +297,8 @@ def generate_texture_functions(fs):
generate_fiu_sigs("txf", "1DArray")
generate_fiu_sigs("txf", "2DArray")
generate_fiu_sigs("txf", "Buffer")
generate_fiu_sigs("txf_ms", "2DMS")
generate_fiu_sigs("txf_ms", "2DMSArray")
end_function(fs, "texelFetch")
start_function("texelFetchOffset")

3
src/glsl/glcpp/glcpp-parse.y
View File

@@ -1230,6 +1230,9 @@ glcpp_parser_create (const struct gl_extensions *extensions, int api)
if (extensions->ARB_shading_language_packing)
add_builtin_define(parser, "GL_ARB_shading_language_packing", 1);
if (extensions->ARB_texture_multisample)
add_builtin_define(parser, "GL_ARB_texture_multisample", 1);
}
}

15
src/glsl/glsl_lexer.ll
View File

@@ -315,6 +315,15 @@ usamplerCube KEYWORD(130, 300, 130, 300, USAMPLERCUBE);
usampler1DArray KEYWORD(130, 300, 130, 0, USAMPLER1DARRAY);
usampler2DArray KEYWORD(130, 300, 130, 300, USAMPLER2DARRAY);
/* additional keywords in ARB_texture_multisample, included in GLSL 1.50 */
/* these are reserved but not defined in GLSL 3.00 */
sampler2DMS KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, SAMPLER2DMS);
isampler2DMS KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, ISAMPLER2DMS);
usampler2DMS KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, USAMPLER2DMS);
sampler2DMSArray KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, SAMPLER2DMSARRAY);
isampler2DMSArray KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, ISAMPLER2DMSARRAY);
usampler2DMSArray KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, USAMPLER2DMSARRAY);
samplerCubeArray {
if (yyextra->ARB_texture_cube_map_array_enable)
return SAMPLERCUBEARRAY;
@@ -531,12 +540,6 @@ atomic_uint KEYWORD(0, 300, 0, 0, ATOMIC_UINT);
patch KEYWORD(0, 300, 0, 0, PATCH);
sample KEYWORD(0, 300, 0, 0, SAMPLE);
subroutine KEYWORD(0, 300, 0, 0, SUBROUTINE);
sampler2DMS KEYWORD(0, 300, 0, 0, SAMPLER2DMS);
isampler2DMS KEYWORD(0, 300, 0, 0, ISAMPLER2DMS);
usampler2DMS KEYWORD(0, 300, 0, 0, USAMPLER2DMS);
sampler2DMSArray KEYWORD(0, 300, 0, 0, SAMPLER2DMSARRAY);
isampler2DMSArray KEYWORD(0, 300, 0, 0, ISAMPLER2DMSARRAY);
usampler2DMSArray KEYWORD(0, 300, 0, 0, USAMPLER2DMSARRAY);
[_a-zA-Z][_a-zA-Z0-9]* {

11
src/glsl/glsl_parser.yy
View File

@@ -109,6 +109,8 @@ static void yyerror(YYLTYPE *loc, _mesa_glsl_parse_state *st, const char *msg)
%token USAMPLER2DARRAY USAMPLERCUBEARRAY
%token SAMPLER2DRECT ISAMPLER2DRECT USAMPLER2DRECT SAMPLER2DRECTSHADOW
%token SAMPLERBUFFER ISAMPLERBUFFER USAMPLERBUFFER
%token SAMPLER2DMS ISAMPLER2DMS USAMPLER2DMS
%token SAMPLER2DMSARRAY ISAMPLER2DMSARRAY USAMPLER2DMSARRAY
%token SAMPLEREXTERNALOES
%token STRUCT VOID_TOK WHILE
%token <identifier> IDENTIFIER TYPE_IDENTIFIER NEW_IDENTIFIER
@@ -140,8 +142,7 @@ static void yyerror(YYLTYPE *loc, _mesa_glsl_parse_state *st, const char *msg)
%token SAMPLER3DRECT
%token SIZEOF CAST NAMESPACE USING
%token COHERENT RESTRICT READONLY WRITEONLY RESOURCE ATOMIC_UINT PATCH SAMPLE
%token SUBROUTINE SAMPLER2DMS ISAMPLER2DMS USAMPLER2DMS SAMPLER2DMSARRAY
%token ISAMPLER2DMSARRAY USAMPLER2DMSARRAY
%token SUBROUTINE
%token ERROR_TOK
@@ -1462,6 +1463,12 @@ basic_type_specifier_nonarray:
| USAMPLER2DARRAY { $$ = "usampler2DArray"; }
| USAMPLERBUFFER { $$ = "usamplerBuffer"; }
| USAMPLERCUBEARRAY { $$ = "usamplerCubeArray"; }
| SAMPLER2DMS { $$ = "sampler2DMS"; }
| ISAMPLER2DMS { $$ = "isampler2DMS"; }
| USAMPLER2DMS { $$ = "usampler2DMS"; }
| SAMPLER2DMSARRAY { $$ = "sampler2DMSArray"; }
| ISAMPLER2DMSARRAY { $$ = "isampler2DMSArray"; }
| USAMPLER2DMSARRAY { $$ = "usampler2DMSArray"; }
;
precision_qualifier:

1
src/glsl/glsl_parser_extras.cpp
View File

@@ -467,6 +467,7 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
EXT(OES_standard_derivatives, false, false, true, false, true, OES_standard_derivatives),
EXT(ARB_texture_cube_map_array, true, false, true, true, false, ARB_texture_cube_map_array),
EXT(ARB_shading_language_packing, true, false, true, true, false, ARB_shading_language_packing),
EXT(ARB_texture_multisample, true, false, true, true, false, ARB_texture_multisample),
};
#undef EXT

2
src/glsl/glsl_parser_extras.h
View File

@@ -280,6 +280,8 @@ struct _mesa_glsl_parse_state {
bool ARB_texture_cube_map_array_warn;
bool ARB_shading_language_packing_enable;
bool ARB_shading_language_packing_warn;
bool ARB_texture_multisample_enable;
bool ARB_texture_multisample_warn;
/*@}*/
/** Extensions supported by the OpenGL implementation. */

17
src/glsl/glsl_types.cpp
View File

@@ -198,6 +198,8 @@ glsl_type::sampler_index() const
return TEXTURE_BUFFER_INDEX;
case GLSL_SAMPLER_DIM_EXTERNAL:
return TEXTURE_EXTERNAL_INDEX;
case GLSL_SAMPLER_DIM_MS:
return (t->sampler_array) ? TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX : TEXTURE_2D_MULTISAMPLE_INDEX;
default:
assert(!"Should not get here.");
return TEXTURE_BUFFER_INDEX;
@@ -344,6 +346,16 @@ glsl_type::generate_ARB_texture_cube_map_array_types(glsl_symbol_table *symtab,
warn, skip_1d);
}
void
glsl_type::generate_ARB_texture_multisample_types(glsl_symbol_table *symtab,
bool warn)
{
bool skip_1d = false;
add_types_to_symbol_table(symtab, builtin_ARB_texture_multisample_types,
Elements(builtin_ARB_texture_multisample_types),
warn, skip_1d);
}
void
_mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state)
{
@@ -413,6 +425,11 @@ _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state)
glsl_type::generate_ARB_texture_cube_map_array_types(state->symbols,
state->ARB_texture_cube_map_array_warn);
}
if (state->ARB_texture_multisample_enable) {
glsl_type::generate_ARB_texture_multisample_types(state->symbols,
state->ARB_texture_multisample_warn);
}
}

5
src/glsl/glsl_types.h
View File

@@ -67,7 +67,8 @@ enum glsl_sampler_dim {
GLSL_SAMPLER_DIM_CUBE,
GLSL_SAMPLER_DIM_RECT,
GLSL_SAMPLER_DIM_BUF,
GLSL_SAMPLER_DIM_EXTERNAL
GLSL_SAMPLER_DIM_EXTERNAL,
GLSL_SAMPLER_DIM_MS
};
enum glsl_interface_packing {
@@ -561,6 +562,7 @@ private:
static const glsl_type builtin_EXT_texture_buffer_object_types[];
static const glsl_type builtin_OES_EGL_image_external_types[];
static const glsl_type builtin_ARB_texture_cube_map_array_types[];
static const glsl_type builtin_ARB_texture_multisample_types[];
/*@}*/
/**
@@ -586,6 +588,7 @@ private:
static void generate_OES_texture_3D_types(glsl_symbol_table *, bool);
static void generate_OES_EGL_image_external_types(glsl_symbol_table *, bool);
static void generate_ARB_texture_cube_map_array_types(glsl_symbol_table *, bool);
static void generate_ARB_texture_multisample_types(glsl_symbol_table *, bool);
/*@}*/
/**

2
src/glsl/ir.cpp
View File

@@ -1307,7 +1307,7 @@ ir_dereference::is_lvalue() const
}
static const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf", "txs" };
static const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf", "txf_ms", "txs" };
const char *ir_texture::opcode_string()
{

4
src/glsl/ir.h
View File

@@ -1424,6 +1424,7 @@ enum ir_texture_opcode {
ir_txl, /**< Texture look-up with explicit LOD */
ir_txd, /**< Texture look-up with partial derivatvies */
ir_txf, /**< Texel fetch with explicit LOD */
ir_txf_ms, /**< Multisample texture fetch */
ir_txs /**< Texture size */
};
@@ -1445,6 +1446,8 @@ enum ir_texture_opcode {
* (txl <type> <sampler> <coordinate> 0 1 ( ) <lod>)
* (txd <type> <sampler> <coordinate> 0 1 ( ) (dPdx dPdy))
* (txf <type> <sampler> <coordinate> 0 <lod>)
* (txf_ms
* <type> <sampler> <coordinate> <sample_index>)
* (txs <type> <sampler> <lod>)
*/
class ir_texture : public ir_rvalue {
@@ -1511,6 +1514,7 @@ public:
union {
ir_rvalue *lod; /**< Floating point LOD */
ir_rvalue *bias; /**< Floating point LOD bias */
ir_rvalue *sample_index; /**< MSAA sample index */
struct {
ir_rvalue *dPdx; /**< Partial derivative of coordinate wrt X */
ir_rvalue *dPdy; /**< Partial derivative of coordinate wrt Y */

3
src/glsl/ir_clone.cpp
View File

@@ -252,6 +252,9 @@ ir_texture::clone(void *mem_ctx, struct hash_table *ht) const
case ir_txs:
new_tex->lod_info.lod = this->lod_info.lod->clone(mem_ctx, ht);
break;
case ir_txf_ms:
new_tex->lod_info.sample_index = this->lod_info.sample_index->clone(mem_ctx, ht);
break;
case ir_txd:
new_tex->lod_info.grad.dPdx = this->lod_info.grad.dPdx->clone(mem_ctx, ht);
new_tex->lod_info.grad.dPdy = this->lod_info.grad.dPdy->clone(mem_ctx, ht);

5
src/glsl/ir_hv_accept.cpp
View File

@@ -226,6 +226,11 @@ ir_texture::accept(ir_hierarchical_visitor *v)
if (s != visit_continue)
return (s == visit_continue_with_parent) ? visit_continue : s;
break;
case ir_txf_ms:
s = this->lod_info.sample_index->accept(v);
if (s != visit_continue)
return (s == visit_continue_with_parent) ? visit_continue : s;
break;
case ir_txd:
s = this->lod_info.grad.dPdx->accept(v);
if (s != visit_continue)

5
src/glsl/ir_print_visitor.cpp
View File

@@ -260,7 +260,7 @@ void ir_print_visitor::visit(ir_texture *ir)
printf(" ");
}
if (ir->op != ir_txf && ir->op != ir_txs) {
if (ir->op != ir_txf && ir->op != ir_txf_ms && ir->op != ir_txs) {
if (ir->projector)
ir->projector->accept(this);
else
@@ -287,6 +287,9 @@ void ir_print_visitor::visit(ir_texture *ir)
case ir_txs:
ir->lod_info.lod->accept(this);
break;
case ir_txf_ms:
ir->lod_info.sample_index->accept(this);
break;
case ir_txd:
printf("(");
ir->lod_info.grad.dPdx->accept(this);

32
src/glsl/ir_reader.cpp
View File

@@ -911,6 +911,7 @@ ir_reader::read_texture(s_expression *expr)
s_expression *s_proj = NULL;
s_list *s_shadow = NULL;
s_expression *s_lod = NULL;
s_expression *s_sample_index = NULL;
ir_texture_opcode op = ir_tex; /* silence warning */
@@ -918,6 +919,8 @@ ir_reader::read_texture(s_expression *expr)
{ "tex", s_type, s_sampler, s_coord, s_offset, s_proj, s_shadow };
s_pattern txf_pattern[] =
{ "txf", s_type, s_sampler, s_coord, s_offset, s_lod };
s_pattern txf_ms_pattern[] =
{ "txf_ms", s_type, s_sampler, s_coord, s_sample_index };
s_pattern txs_pattern[] =
{ "txs", s_type, s_sampler, s_lod };
s_pattern other_pattern[] =
@@ -927,6 +930,8 @@ ir_reader::read_texture(s_expression *expr)
op = ir_tex;
} else if (MATCH(expr, txf_pattern)) {
op = ir_txf;
} else if (MATCH(expr, txf_ms_pattern)) {
op = ir_txf_ms;
} else if (MATCH(expr, txs_pattern)) {
op = ir_txs;
} else if (MATCH(expr, other_pattern)) {
@@ -966,18 +971,20 @@ ir_reader::read_texture(s_expression *expr)
return NULL;
}
// Read texel offset - either 0 or an rvalue.
s_int *si_offset = SX_AS_INT(s_offset);
if (si_offset == NULL || si_offset->value() != 0) {
tex->offset = read_rvalue(s_offset);
if (tex->offset == NULL) {
ir_read_error(s_offset, "expected 0 or an expression");
return NULL;
}
if (op != ir_txf_ms) {
// Read texel offset - either 0 or an rvalue.
s_int *si_offset = SX_AS_INT(s_offset);
if (si_offset == NULL || si_offset->value() != 0) {
tex->offset = read_rvalue(s_offset);
if (tex->offset == NULL) {
ir_read_error(s_offset, "expected 0 or an expression");
return NULL;
}
}
}
}
if (op != ir_txf && op != ir_txs) {
if (op != ir_txf && op != ir_txf_ms && op != ir_txs) {
s_int *proj_as_int = SX_AS_INT(s_proj);
if (proj_as_int && proj_as_int->value() == 1) {
tex->projector = NULL;
@@ -1020,6 +1027,13 @@ ir_reader::read_texture(s_expression *expr)
return NULL;
}
break;
case ir_txf_ms:
tex->lod_info.sample_index = read_rvalue(s_sample_index);
if (tex->lod_info.sample_index == NULL) {
ir_read_error(NULL, "when reading sample_index in (txf_ms ...)");
return NULL;
}
break;
case ir_txd: {
s_expression *s_dx, *s_dy;
s_pattern dxdy_pat[] = { s_dx, s_dy };

3
src/glsl/ir_rvalue_visitor.cpp
View File

@@ -66,6 +66,9 @@ ir_rvalue_base_visitor::rvalue_visit(ir_texture *ir)
case ir_txs:
handle_rvalue(&ir->lod_info.lod);
break;
case ir_txf_ms:
handle_rvalue(&ir->lod_info.sample_index);
break;
case ir_txd:
handle_rvalue(&ir->lod_info.grad.dPdx);
handle_rvalue(&ir->lod_info.grad.dPdy);

4
src/glsl/opt_tree_grafting.cpp
View File

@@ -285,6 +285,10 @@ ir_tree_grafting_visitor::visit_enter(ir_texture *ir)
if (do_graft(&ir->lod_info.lod))
return visit_stop;
break;
case ir_txf_ms:
if (do_graft(&ir->lod_info.sample_index))
return visit_stop;
break;
case ir_txd:
if (do_graft(&ir->lod_info.grad.dPdx) ||
do_graft(&ir->lod_info.grad.dPdy))

1
src/glsl/standalone_scaffolding.cpp
View File

@@ -102,6 +102,7 @@ void initialize_context_to_defaults(struct gl_context *ctx, gl_api api)
ctx->Extensions.ARB_shading_language_packing = true;
ctx->Extensions.OES_standard_derivatives = true;
ctx->Extensions.ARB_texture_cube_map_array = true;
ctx->Extensions.ARB_texture_multisample = true;
ctx->Const.GLSLVersion = 120;