fabi/Xenia-Canary
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[Vulkan] Add resolution scaling support to Vulkan backend.

Browse Source 
Largely similar to D3D12 implementation but more simple buffer
management and no mips scaling. Includes both FBO and FSI
rendering paths.

Tested on Linux with 2x2 and 3x3 running smoothly.
This commit is contained in:
Herman S.
2025-08-27 20:44:15 +09:00
committed by Radosław Gliński
parent 2de1b0b2dd
commit d430342d93
11 changed files with 563 additions and 53 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/xenia/gpu/spirv_shader_translator.cc
View File

@@ -1926,8 +1926,7 @@ void SpirvShaderTranslator::StartFragmentShaderBeforeMain() {
}
void SpirvShaderTranslator::StartFragmentShaderInMain() {
// TODO(Triang3l): Allow memory export with resolution scaling only for the
// center host pixel, with sample shading (for depth format conversion) only
// TODO(Triang3l): With sample shading (for depth format conversion) only
// for the bottom-right sample (unlike in Direct3D, the sample mask input
// doesn't include covered samples of the primitive that correspond to other
// invocations, so use the sample that's the most friendly to the half-pixel
@@ -2083,7 +2082,6 @@ void SpirvShaderTranslator::StartFragmentShaderInMain() {
// see the actual hardware instructions in both OpBitwiseXor and OpFNegate
// cases.
spv::Id const_sign_bit = builder_->makeUintConstant(UINT32_C(1) << 31);
// TODO(Triang3l): Resolution scale inversion.
// X - pixel X .0 in the magnitude, is back-facing in the sign bit.
assert_true(input_fragment_coordinates_ != spv::NoResult);
id_vector_temp_.clear();
@@ -2097,6 +2095,12 @@ void SpirvShaderTranslator::StartFragmentShaderInMain() {
input_fragment_coordinates_,
id_vector_temp_),
spv::NoPrecision)));
// Apply resolution scale inversion after truncating.
if (draw_resolution_scale_x_ > 1) {
param_gen_x = builder_->createBinOp(
spv::OpFMul, type_float_, param_gen_x,
builder_->makeFloatConstant(1.0f / float(draw_resolution_scale_x_)));
}
if (!modification.pixel.param_gen_point) {
assert_true(input_front_facing_ != spv::NoResult);
param_gen_x = builder_->createTriOp(
@@ -2132,6 +2136,12 @@ void SpirvShaderTranslator::StartFragmentShaderInMain() {
input_fragment_coordinates_,
id_vector_temp_),
spv::NoPrecision)));
// Apply resolution scale inversion after truncating.
if (draw_resolution_scale_y_ > 1) {
param_gen_y = builder_->createBinOp(
spv::OpFMul, type_float_, param_gen_y,
builder_->makeFloatConstant(1.0f / float(draw_resolution_scale_y_)));
}
if (modification.pixel.param_gen_point) {
param_gen_y = builder_->createUnaryOp(
spv::OpBitcast, type_float_,