- added Build's NPOT emulation to the backend.

For GZDoom this is completely disabled, of course, because the Doom engine does not need it, but in order to have the same backend code in both engines it needs to be present.

src/common/rendering/vulkan/shaders/vk_shader.cpp

@@ -25,6 +25,7 @@
 #include "hw_shaderpatcher.h"
 #include "filesystem.h"
 #include "engineerrors.h"
+#include "version.h"
 #include <ShaderLang.h>
 
 VkShaderManager::VkShaderManager(VulkanDevice *device) : device(device)
@@ -162,6 +163,9 @@ static const char *shaderBindings = R"(
 		vec4 uSplitBottomPlane;
 
 		vec4 uDetailParms;
+		#ifdef NPOT_EMULATION
+		vec2 uNpotEmulation;
+		#endif
 	};
 
 	layout(set = 0, binding = 3, std140) uniform StreamUBO {
@@ -248,6 +252,7 @@ static const char *shaderBindings = R"(
 	#define uSplitTopPlane data[uDataIndex].uSplitTopPlane
 	#define uSplitBottomPlane data[uDataIndex].uSplitBottomPlane
 	#define uDetailParms data[uDataIndex].uDetailParms
+	#define uNpotEmulation data[uDataIndex].uNpotEmulation
 
 	#define SUPPORTS_SHADOWMAPS
 	#define VULKAN_COORDINATE_SYSTEM
@@ -270,6 +275,9 @@ std::unique_ptr<VulkanShader> VkShaderManager::LoadVertShader(FString shadername
 	FString code = GetTargetGlslVersion();
 	code << defines;
 	code << "\n#define MAX_STREAM_DATA " << std::to_string(MAX_STREAM_DATA).c_str() << "\n";
+#ifdef NPOT_EMULATION
+	code << "#define NPOT_EMULATION\n"
+#endif
 	code << shaderBindings;
 	if (!device->UsedDeviceFeatures.shaderClipDistance) code << "#define NO_CLIPDISTANCE_SUPPORT\n";
 	code << "#line 1\n";