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CompilerMSL support OpImageFetch and Metal read() function.

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Don't emit automatic sampler when using texture read().
Convert tex coords to uintN() when using texture read().
Emit face when read()ing cube textures.
This commit is contained in:
Bill Hollings 2017-01-20 17:30:36 -05:00
parent 2d0d328f61
commit ef1f860c01
1 changed files with 90 additions and 12 deletions
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92
spirv_msl.cpp
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@ -722,14 +722,17 @@ string CompilerMSL::to_function_name(uint32_t img, const SPIRType &, bool is_fet
string CompilerMSL::to_function_args(uint32_t img, const SPIRType &imgtype, bool is_fetch, bool, bool is_proj,
uint32_t coord, uint32_t, uint32_t dref, uint32_t grad_x, uint32_t grad_y,
uint32_t lod, uint32_t coffset, uint32_t offset, uint32_t bias, uint32_t comp,
uint32_t, bool *p_forward)
uint32_t sample, bool *p_forward)
{
string farg_str = to_sampler_expression(img);
string farg_str;
if (!is_fetch)
farg_str += to_sampler_expression(img);
// Texture coordinates
bool forward = should_forward(coord);
auto coord_expr = to_enclosed_expression(coord);
string tex_coords = coord_expr;
string face_expr;
const char *alt_coord = "";
switch (imgtype.image.dim)
@ -738,6 +741,9 @@ string CompilerMSL::to_function_args(uint32_t img, const SPIRType &imgtype, bool
tex_coords = coord_expr + ".x";
remove_duplicate_swizzle(tex_coords);
if (is_fetch)
tex_coords = "uint(" + tex_coords + ")";
alt_coord = ".y";
break;
@ -749,12 +755,18 @@ string CompilerMSL::to_function_args(uint32_t img, const SPIRType &imgtype, bool
remove_duplicate_swizzle(coord_x);
string coord_y = coord_expr + ".y";
remove_duplicate_swizzle(coord_y);
if (is_fetch)
tex_coords = "uint2(" + coord_x + ", (1.0 - " + coord_y + "))";
else
tex_coords = "float2(" + coord_x + ", (1.0 - " + coord_y + "))";
}
else
{
tex_coords = coord_expr + ".xy";
remove_duplicate_swizzle(tex_coords);
if (is_fetch)
tex_coords = "uint2(" + tex_coords + ")";
}
alt_coord = ".z";
@ -762,6 +774,32 @@ string CompilerMSL::to_function_args(uint32_t img, const SPIRType &imgtype, bool
break;
case Dim3D:
if (msl_config.flip_frag_y)
{
string coord_x = coord_expr + ".x";
remove_duplicate_swizzle(coord_x);
string coord_y = coord_expr + ".y";
remove_duplicate_swizzle(coord_y);
string coord_z = coord_expr + ".z";
remove_duplicate_swizzle(coord_z);
if (is_fetch)
tex_coords = "uint3(" + coord_x + ", (1.0 - " + coord_y + "), " + coord_z + ")";
else
tex_coords = "float3(" + coord_x + ", (1.0 - " + coord_y + "), " + coord_z + ")";
}
else
{
tex_coords = coord_expr + ".xyz";
remove_duplicate_swizzle(tex_coords);
if (is_fetch)
tex_coords = "uint3(" + tex_coords + ")";
}
alt_coord = ".w";
break;
case DimCube:
if (msl_config.flip_frag_y)
{
@ -771,13 +809,32 @@ string CompilerMSL::to_function_args(uint32_t img, const SPIRType &imgtype, bool
remove_duplicate_swizzle(coord_y);
string coord_z = coord_expr + ".z";
remove_duplicate_swizzle(coord_z);
if (is_fetch)
{
tex_coords = "uint2(" + coord_x + ", (1.0 - " + coord_y + "))";
face_expr = coord_z;
}
else
tex_coords = "float3(" + coord_x + ", (1.0 - " + coord_y + "), " + coord_z + ")";
}
else
{
if (is_fetch)
{
tex_coords = coord_expr + ".xy";
remove_duplicate_swizzle(tex_coords);
tex_coords = "uint2(" + tex_coords + ")";
face_expr = coord_expr + ".z";
remove_duplicate_swizzle(face_expr);
}
else
{
tex_coords = coord_expr + ".xyz";
remove_duplicate_swizzle(tex_coords);
}
}
alt_coord = ".w";
@ -787,15 +844,30 @@ string CompilerMSL::to_function_args(uint32_t img, const SPIRType &imgtype, bool
break;
}
// Use alt coord for projection or texture array
if (imgtype.image.arrayed)
tex_coords += ", " + coord_expr + alt_coord;
else if (is_proj)
tex_coords += " / " + coord_expr + alt_coord;
// If projection, use alt coord as divisor
if (is_proj)
{
string divisor = coord_expr + alt_coord;
remove_duplicate_swizzle(divisor);
tex_coords += " / " + divisor;
}
if (!farg_str.empty())
farg_str += ", ";
farg_str += tex_coords;
// If fetch from cube, add face explicitly
if (!face_expr.empty())
farg_str += ", uint(" + face_expr + ")";
// If array, use alt coord
if (imgtype.image.arrayed)
{
string array_index = coord_expr + alt_coord;
remove_duplicate_swizzle(array_index);
farg_str += ", uint(" + array_index + ")";
}
// Depth compare reference value
if (dref)
{
@ -913,6 +985,12 @@ string CompilerMSL::to_function_args(uint32_t img, const SPIRType &imgtype, bool
farg_str += ", " + to_component_argument(comp);
}
if (sample)
{
farg_str += ", ";
farg_str += to_expression(sample);
}
*p_forward = forward;
return farg_str;