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vkd3d-shader/spirv: Allow the origin of fragment coordinates to be specified.

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We typically want to use lower-left in OpenGL environments when rendering to
FBOs.
This commit is contained in:
Henri Verbeet 2023-10-14 18:07:38 +02:00 committed by Alexandre Julliard
parent 0805ce121e
commit e7eec3e023
Notes: Alexandre Julliard 2023-11-10 00:08:58 +01:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/457
2 changed files with 37 additions and 1 deletions
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25
include/vkd3d_shader.h
View File

@ -173,6 +173,21 @@ enum vkd3d_shader_compile_option_backward_compatibility
VKD3D_FORCE_32_BIT_ENUM(VKD3D_SHADER_COMPILE_OPTION_BACKWARD_COMPATIBILITY),
};
/**
* Determines the origin of fragment coordinates.
*
* \since 1.10
*/
enum vkd3d_shader_compile_option_fragment_coordinate_origin
{
/** Fragment coordinates originate from the upper-left. This is the
* default; it's also the only value supported by Vulkan environments. */
VKD3D_SHADER_COMPILE_OPTION_FRAGMENT_COORDINATE_ORIGIN_UPPER_LEFT = 0x00000000,
/** Fragment coordinates originate from the lower-left. This matches the
* traditional behaviour of OpenGL environments. */
VKD3D_SHADER_COMPILE_OPTION_FRAGMENT_COORDINATE_ORIGIN_LOWER_LEFT = 0x00000001,
};
enum vkd3d_shader_compile_option_name
{
/**
@ -220,6 +235,16 @@ enum vkd3d_shader_compile_option_name
* \since 1.10
*/
VKD3D_SHADER_COMPILE_OPTION_BACKWARD_COMPATIBILITY = 0x00000008,
/**
* This option specifies the origin of fragment coordinates for SPIR-V
* targets.
*
* \a value is a member of enum
* vkd3d_shader_compile_option_fragment_coordinate_origin.
*
* \since 1.10
*/
VKD3D_SHADER_COMPILE_OPTION_FRAGMENT_COORDINATE_ORIGIN = 0x00000009,
VKD3D_FORCE_32_BIT_ENUM(VKD3D_SHADER_COMPILE_OPTION_NAME),
};

13
libs/vkd3d-shader/spirv.c
View File

@ -2288,6 +2288,7 @@ struct spirv_compiler
bool strip_debug;
bool ssbo_uavs;
bool uav_read_without_format;
SpvExecutionMode fragment_coordinate_origin;
struct rb_tree symbol_table;
uint32_t temp_id;
@ -2453,6 +2454,7 @@ static struct spirv_compiler *spirv_compiler_create(const struct vkd3d_shader_ve
compiler->formatting = VKD3D_SHADER_COMPILE_OPTION_FORMATTING_INDENT
| VKD3D_SHADER_COMPILE_OPTION_FORMATTING_HEADER;
compiler->write_tess_geom_point_size = true;
compiler->fragment_coordinate_origin = SpvExecutionModeOriginUpperLeft;
for (i = 0; i < compile_info->option_count; ++i)
{
@ -2493,6 +2495,15 @@ static struct spirv_compiler *spirv_compiler_create(const struct vkd3d_shader_ve
compiler->write_tess_geom_point_size = option->value;
break;
case VKD3D_SHADER_COMPILE_OPTION_FRAGMENT_COORDINATE_ORIGIN:
if (option->value == VKD3D_SHADER_COMPILE_OPTION_FRAGMENT_COORDINATE_ORIGIN_UPPER_LEFT)
compiler->fragment_coordinate_origin = SpvExecutionModeOriginUpperLeft;
else if (option->value == VKD3D_SHADER_COMPILE_OPTION_FRAGMENT_COORDINATE_ORIGIN_LOWER_LEFT)
compiler->fragment_coordinate_origin = SpvExecutionModeOriginLowerLeft;
else
WARN("Ignoring unrecognised value %#x for option %#x.\n", option->value, option->name);
break;
default:
WARN("Ignoring unrecognised option %#x with value %#x.\n", option->name, option->value);
break;
@ -5358,7 +5369,7 @@ static void spirv_compiler_emit_initial_declarations(struct spirv_compiler *comp
break;
case VKD3D_SHADER_TYPE_PIXEL:
vkd3d_spirv_set_execution_model(builder, SpvExecutionModelFragment);
spirv_compiler_emit_execution_mode(compiler, SpvExecutionModeOriginUpperLeft, NULL, 0);
spirv_compiler_emit_execution_mode(compiler, compiler->fragment_coordinate_origin, NULL, 0);
break;
case VKD3D_SHADER_TYPE_COMPUTE:
vkd3d_spirv_set_execution_model(builder, SpvExecutionModelGLCompute);