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[Vulkan] Add resolution scaling support to Vulkan backend.

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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
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18
src/xenia/gpu/spirv_shader_translator_rb.cc
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@@ -763,9 +763,10 @@ void SpirvShaderTranslator::CompleteFragmentShaderInMain() {
fsi_color_targets_written =
builder_->createLoad(var_main_fsi_color_written_, spv::NoPrecision);
fsi_const_int_1 = builder_->makeIntConstant(1);
// TODO(Triang3l): Resolution scaling.
// Apply resolution scaling to EDRAM size.
fsi_const_edram_size_dwords = builder_->makeUintConstant(
xenos::kEdramTileWidthSamples * xenos::kEdramTileHeightSamples *
xenos::kEdramTileWidthSamples * draw_resolution_scale_x_ *
xenos::kEdramTileHeightSamples * draw_resolution_scale_y_ *
xenos::kEdramTileCount);
for (uint32_t i = 0; i < 4; ++i) {
fsi_samples_covered[i] = builder_->createBinOp(
@@ -1447,10 +1448,12 @@ void SpirvShaderTranslator::FSI_LoadEdramOffsets(spv::Id msaa_samples) {
// Get 40 x 16 x resolution scale 32bpp half-tile or 40x16 64bpp tile index.
// Working with 40x16-sample portions for 64bpp and for swapping for depth -
// dividing by 40, not by 80.
// TODO(Triang3l): Resolution scaling.
uint32_t tile_width = xenos::kEdramTileWidthSamples;
// Apply resolution scaling to tile dimensions.
uint32_t tile_width =
xenos::kEdramTileWidthSamples * draw_resolution_scale_x_;
spv::Id const_tile_half_width = builder_->makeUintConstant(tile_width >> 1);
uint32_t tile_height = xenos::kEdramTileHeightSamples;
uint32_t tile_height =
xenos::kEdramTileHeightSamples * draw_resolution_scale_y_;
spv::Id const_tile_height = builder_->makeUintConstant(tile_height);
spv::Id tile_half_index[2], tile_half_sample_coordinates[2];
for (uint32_t i = 0; i < 2; ++i) {
@@ -1563,8 +1566,9 @@ spv::Id SpirvShaderTranslator::FSI_AddSampleOffset(spv::Id sample_0_address,
return sample_0_address;
}
spv::Id sample_offset;
// TODO(Triang3l): Resolution scaling.
uint32_t tile_width = xenos::kEdramTileWidthSamples;
// Apply resolution scaling to tile width.
uint32_t tile_width =
xenos::kEdramTileWidthSamples * draw_resolution_scale_x_;
if (sample_index == 1) {
sample_offset = builder_->makeIntConstant(tile_width);
} else {