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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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10
src/xenia/gpu/spirv_shader_translator.h
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@@ -349,11 +349,15 @@ class SpirvShaderTranslator : public ShaderTranslator {
SpirvShaderTranslator(const Features& features,
bool native_2x_msaa_with_attachments,
bool native_2x_msaa_no_attachments,
bool edram_fragment_shader_interlock)
bool edram_fragment_shader_interlock,
uint32_t draw_resolution_scale_x = 1,
uint32_t draw_resolution_scale_y = 1)
: features_(features),
native_2x_msaa_with_attachments_(native_2x_msaa_with_attachments),
native_2x_msaa_no_attachments_(native_2x_msaa_no_attachments),
edram_fragment_shader_interlock_(edram_fragment_shader_interlock) {}
edram_fragment_shader_interlock_(edram_fragment_shader_interlock),
draw_resolution_scale_x_(draw_resolution_scale_x),
draw_resolution_scale_y_(draw_resolution_scale_y) {}
uint64_t GetDefaultVertexShaderModification(
uint32_t dynamic_addressable_register_count,
@@ -711,6 +715,8 @@ class SpirvShaderTranslator : public ShaderTranslator {
Features features_;
bool native_2x_msaa_with_attachments_;
bool native_2x_msaa_no_attachments_;
uint32_t draw_resolution_scale_x_;
uint32_t draw_resolution_scale_y_;
// For safety with different drivers (even though fragment shader interlock in
// SPIR-V only has one control flow requirement - that both begin and end must