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Approximate explicit-LOD texture gathers at mip zero

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Credits:
YuhiAida (@YuhiAida):
https://github.com/KytyPS5/KytyPS5/pull/588
https://github.com/KytyPS5/KytyPS5/pull/589
https://github.com/KytyPS5/KytyPS5/pull/655
frans (@francoisatt):
https://github.com/KytyPS5/KytyPS5/pull/590
BlackCAT (@psnwd):
https://github.com/KytyPS5/KytyPS5/pull/613
shadowbeat070 (@shadowbeat070):
https://github.com/KytyPS5/KytyPS5/pull/654
Pouare514 (@Pouare514):
https://github.com/KytyPS5/KytyPS5/pull/29
https://github.com/KytyPS5/KytyPS5/pull/32
This commit is contained in:
nmzik
2026-09-17 08:39:57 +04:00
parent fa913ec1a7
commit e0ecffed70
6 changed files with 47 additions and 3 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterImage.cpp
+9
View File
@@ -3,7 +3,9 @@
#include "graphics/shader/recompiler/frontend/decode/ImageOps.h"
#include <algorithm>
#include <atomic>
#include <bit>
#include <cstdio>
namespace Libs::Graphics::ShaderRecompiler::Spirv::Emitter {
namespace {
@@ -646,6 +648,13 @@ void EmitImage(ValueEmitContext& ctx, const IR::Inst& inst) {
const auto coord =
CoordF32(ctx, mem, *address, layout.coord, dimension_info.coordinate_components);
if (op == IR::ValueOpcode::ImageGatherRaw) {
if (HasFlag(mem, Decoder::ImageSampleFlagLod)) {
static std::atomic_flag warned = ATOMIC_FLAG_INIT;
if (!warned.test_and_set(std::memory_order_relaxed)) {
std::fputs("Warning: approximating IMAGE_GATHER4_L at mip level 0; explicit LOD is ignored.\n",
stderr);
}
}
if (dimension == ImageDimension::Dim1D) {
if (dref || !HasFlag(mem, Decoder::ImageSampleFlagLevelZero) ||
HasFlag(mem, Decoder::ImageSampleFlagOffset) ||