Make tessellation optional

src/common/emulatorConfig.cpp

@@ -135,6 +135,10 @@ bool ReadbackLinearImagesEnabled() {
 	return g_config->readback_linear_images;
 }
 
+bool TessellationEnabled() {
+	return g_config->tessellation_enabled;
+}
+
 bool PlayGoHackEnabled() {
 	return g_config->playgo_hack_enabled;
 }

src/common/emulatorConfig.h

@@ -66,6 +66,7 @@ struct ConfigOptions {
 	bool                   gpu_assisted_validation_enabled = false;
 	bool                   renderdoc_enabled           = false;
 	bool                   readback_linear_images      = false;
+	bool                   tessellation_enabled        = false;
 	bool                   playgo_hack_enabled         = false;
 #if KYTY_PLATFORM == KYTY_PLATFORM_WINDOWS
 	bool red_zone_protection_enabled = false;
@@ -110,6 +111,7 @@ bool GpuAssistedValidationEnabled();
 
 bool RenderDocEnabled();
 bool ReadbackLinearImagesEnabled();
+bool TessellationEnabled();
 bool PlayGoHackEnabled();
 #if KYTY_PLATFORM == KYTY_PLATFORM_WINDOWS
 bool RedZoneProtectionEnabled();

src/graphics/host_gpu/renderer/renderDraw.cpp

@@ -2,6 +2,7 @@
 
 #include "common/assert.h"
 #include "common/common.h"
+#include "common/emulatorConfig.h"
 #include "common/file.h"
 #include "common/logging/log.h"
 #include "common/profiler.h"
@@ -813,6 +814,8 @@ static bool GetDrawTopology(const HW::UserConfig& ucfg, bool auto_draw,
 			topology = vk::PrimitiveTopology::eTriangleStrip;
 			break;
 		case Prospero::PrimitiveType::kPatch:
+			if (!Config::TessellationEnabled()) return false;
+			[[fallthrough]];
 		case Prospero::PrimitiveType::kRectList:
 			topology = vk::PrimitiveTopology::ePatchList;
 			break;

src/main.cpp

@@ -64,6 +64,7 @@ static void PrintUsage() {
 	::printf("  --gpu-assisted-validation <t|f>      Bounds-check shader accesses on the GPU.\n"
 	         "                                       Implies --vulkan-validation; very slow.\n");
 	::printf("  --shader-validation <true|false>     Enable shader validation.\n");
+	::printf("  --tessellation                      Draw tessellation patches; skipped by default.\n");
 	::printf("  --shader-optimization-type <value>   None, Size, or Performance.\n");
 	::printf("  --shader-log-direction <value>       Silent, Console, or File.\n");
 	::printf("  --shader-log-folder <path>           Shader log output folder.\n");
@@ -180,6 +181,11 @@ static bool ParseArgs(int argc, char* argv[], RunOptions& options, bool& show_he
 			continue;
 		}
 
+		if (arg == "--tessellation") {
+			options.config.tessellation_enabled = true;
+			continue;
+		}
+
 		if (arg == "--profile") {
 			options.config.profiler_enabled = true;
 			continue;