[vulkan] Corrected mishandling of render area + rescaling logic by using wrongly push constants

src/shader_recompiler/backend/spirv/emit_spirv.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
@@ -31,7 +31,7 @@ struct RenderAreaLayout {
 };
 constexpr u32 RESCALING_LAYOUT_WORDS_OFFSET = offsetof(RescalingLayout, rescaling_textures);
 constexpr u32 RESCALING_LAYOUT_DOWN_FACTOR_OFFSET = offsetof(RescalingLayout, down_factor);
-constexpr u32 RENDERAREA_LAYOUT_OFFSET = offsetof(RenderAreaLayout, render_area);
+constexpr u32 RENDERAREA_LAYOUT_OFFSET = sizeof(RescalingLayout);
 
 [[nodiscard]] std::vector<u32> EmitSPIRV(const Profile& profile, const RuntimeInfo& runtime_info,
                                          IR::Program& program, Bindings& bindings, bool optimize);

src/shader_recompiler/backend/spirv/spirv_emit_context.cpp

@@ -1096,7 +1096,8 @@ void EmitContext::DefineRenderArea(const Info& info) {
         Decorate(push_constant_struct, spv::Decoration::Block);
         Name(push_constant_struct, "RenderAreaInfo");
 
-        MemberDecorate(push_constant_struct, render_are_member_index, spv::Decoration::Offset, 0);
+        MemberDecorate(push_constant_struct, render_are_member_index, spv::Decoration::Offset,
+                   RENDERAREA_LAYOUT_OFFSET);
         MemberName(push_constant_struct, render_are_member_index, "render_area");
 
         const Id pointer_type{TypePointer(spv::StorageClass::PushConstant, push_constant_struct)};