[GPU] Add anisotropic filtering override

src/xenia/gpu/dxbc_shader_translator.cc

@@ -17,6 +17,7 @@
 #include "xenia/base/cvar.h"
 #include "xenia/base/math.h"
 #include "xenia/gpu/dxbc_shader.h"
+#include "xenia/gpu/gpu_flags.h"
 #include "xenia/gpu/xenos.h"
 #include "xenia/ui/graphics_provider.h"
 
@@ -1378,7 +1379,10 @@ void DxbcShaderTranslator::PostTranslation() {
       shader_binding.mag_filter = translator_binding.mag_filter;
       shader_binding.min_filter = translator_binding.min_filter;
       shader_binding.mip_filter = translator_binding.mip_filter;
-      shader_binding.aniso_filter = translator_binding.aniso_filter;
+      shader_binding.aniso_filter =
+          cvars::anisotropic_override > -1 && cvars::anisotropic_override < 6
+              ? xenos::AnisoFilter(cvars::anisotropic_override)
+              : translator_binding.aniso_filter;
     }
   }
 }

src/xenia/gpu/gpu_flags.cc

@@ -70,3 +70,15 @@ DEFINE_int32(
     "Set to higher number than query_occlusion_sample_lower_threshold. This "
     "value is ignored if query_occlusion_sample_lower_threshold is set to -1.",
     "GPU");
+
+DEFINE_int32(anisotropic_override, -1,
+             "Level of anisotropic filtering enforced on all texture fetch "
+             "instructions.\n"
+             " -1 = No override\n"
+             "  0 = Disable anisotropic filtering\n"
+             "  1 = Force 1x anisotropic filtering\n"
+             "  2 = Force 2x anisotropic filtering\n"
+             "  3 = Force 4x anisotropic filtering\n"
+             "  4 = Force 8x anisotropic filtering\n"
+             "  5 = Force 16x anisotropic filtering",
+             "GPU");

src/xenia/gpu/gpu_flags.h

@@ -30,6 +30,8 @@ DECLARE_int32(query_occlusion_sample_lower_threshold);
 
 DECLARE_int32(query_occlusion_sample_upper_threshold);
 
+DECLARE_int32(anisotropic_override);
+
 DECLARE_bool(disassemble_pm4);
 
 #define XE_GPU_FINE_GRAINED_DRAW_SCOPES 1

src/xenia/gpu/spirv_shader_translator.cc

@@ -17,6 +17,7 @@
 #include "xenia/base/assert.h"
 #include "xenia/base/math.h"
 #include "xenia/base/string_buffer.h"
+#include "xenia/gpu/gpu_flags.h"
 #include "xenia/gpu/spirv_shader.h"
 
 namespace xe {
@@ -807,7 +808,10 @@ void SpirvShaderTranslator::PostTranslation() {
       shader_binding.mag_filter = translator_binding.mag_filter;
       shader_binding.min_filter = translator_binding.min_filter;
       shader_binding.mip_filter = translator_binding.mip_filter;
-      shader_binding.aniso_filter = translator_binding.aniso_filter;
+      shader_binding.aniso_filter =
+          cvars::anisotropic_override > -1 && cvars::anisotropic_override < 6
+              ? xenos::AnisoFilter(cvars::anisotropic_override)
+              : translator_binding.aniso_filter;
     }
   }
 }