5 files changed, 36 insertions, 0 deletions

diff --git a/src/shader_recompiler/backend/glsl/emit_context.cpp b/src/shader_recompiler/backend/glsl/emit_context.cpp
index 4e6f2c0fe..97bd59302 100644
--- a/src/shader_recompiler/backend/glsl/emit_context.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_context.cpp
@@ -393,6 +393,9 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
             DefineGenericOutput(index, program.invocations);
         }
     }
+    if (info.uses_rescaling_uniform) {
+        header += "layout(location=0) uniform vec4 scaling;";
+    }
     DefineConstantBuffers(bindings);
     DefineStorageBuffers(bindings);
     SetupImages(bindings);
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
index 170db269a..4c26f3829 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
@@ -445,6 +445,10 @@ void EmitYDirection(EmitContext& ctx, IR::Inst& inst) {
     ctx.AddF32("{}=gl_FrontMaterial.ambient.a;", inst);
 }
 
+void EmitResolutionDownFactor(EmitContext& ctx, IR::Inst& inst) {
+    ctx.AddF32("{}=scaling.z;", inst);
+}
+
 void EmitLoadLocal(EmitContext& ctx, IR::Inst& inst, std::string_view word_offset) {
     ctx.AddU32("{}=lmem[{}];", inst, word_offset);
 }
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
index 447eb8e0a..2f78d0267 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
@@ -612,6 +612,22 @@ void EmitImageAtomicExchange32(EmitContext& ctx, IR::Inst& inst, const IR::Value
                value);
 }
 
+void EmitIsTextureScaled(EmitContext& ctx, IR::Inst& inst, const IR::Value& index) {
+    if (!index.IsImmediate()) {
+        throw NotImplementedException("Non-constant texture rescaling");
+    }
+    const u32 image_index{index.U32()};
+    ctx.AddU1("{}=(ftou(scaling.x)&{})!=0;", inst, 1u << image_index);
+}
+
+void EmitIsImageScaled(EmitContext& ctx, IR::Inst& inst, const IR::Value& index) {
+    if (!index.IsImmediate()) {
+        throw NotImplementedException("Non-constant texture rescaling");
+    }
+    const u32 image_index{index.U32()};
+    ctx.AddU1("{}=(ftou(scaling.y)&{})!=0;", inst, 1u << image_index);
+}
+
 void EmitBindlessImageSampleImplicitLod(EmitContext&) {
     NotImplemented();
 }
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h b/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
index 5936d086f..f86502e4c 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
@@ -85,6 +85,7 @@ void EmitInvocationId(EmitContext& ctx, IR::Inst& inst);
 void EmitSampleId(EmitContext& ctx, IR::Inst& inst);
 void EmitIsHelperInvocation(EmitContext& ctx, IR::Inst& inst);
 void EmitYDirection(EmitContext& ctx, IR::Inst& inst);
+void EmitResolutionDownFactor(EmitContext& ctx, IR::Inst& inst);
 void EmitLoadLocal(EmitContext& ctx, IR::Inst& inst, std::string_view word_offset);
 void EmitWriteLocal(EmitContext& ctx, std::string_view word_offset, std::string_view value);
 void EmitUndefU1(EmitContext& ctx, IR::Inst& inst);
@@ -362,6 +363,8 @@ void EmitIAdd64(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::strin
 void EmitISub32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b);
 void EmitISub64(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b);
 void EmitIMul32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b);
+void EmitSDiv32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b);
+void EmitUDiv32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b);
 void EmitINeg32(EmitContext& ctx, IR::Inst& inst, std::string_view value);
 void EmitINeg64(EmitContext& ctx, IR::Inst& inst, std::string_view value);
 void EmitIAbs32(EmitContext& ctx, IR::Inst& inst, std::string_view value);
@@ -627,6 +630,8 @@ void EmitImageRead(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
                    std::string_view coords);
 void EmitImageWrite(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
                     std::string_view coords, std::string_view color);
+void EmitIsTextureScaled(EmitContext& ctx, IR::Inst& inst, const IR::Value& index);
+void EmitIsImageScaled(EmitContext& ctx, IR::Inst& inst, const IR::Value& index);
 void EmitBindlessImageAtomicIAdd32(EmitContext&);
 void EmitBindlessImageAtomicSMin32(EmitContext&);
 void EmitBindlessImageAtomicUMin32(EmitContext&);
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp
index 38419f88f..88c1d4c5e 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp
@@ -78,6 +78,14 @@ void EmitIMul32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::strin
     ctx.AddU32("{}=uint({}*{});", inst, a, b);
 }
 
+void EmitSDiv32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b) {
+    ctx.AddU32("{}=uint(int({})/int({}));", inst, a, b);
+}
+
+void EmitUDiv32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b) {
+    ctx.AddU32("{}={}/{};", inst, a, b);
+}
+
 void EmitINeg32(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
     ctx.AddU32("{}=uint(-({}));", inst, value);
 }