Add support for HDR canvas textures

Vulkan only.

src/common/rendering/vulkan/textures/vk_hwtexture.cpp

@@ -113,7 +113,7 @@ void VkHardwareTexture::CreateImage(FTexture *tex, int translation, int flags)
 	}
 	else
 	{
-		VkFormat format = VK_FORMAT_R8G8B8A8_UNORM;
+		VkFormat format = tex->IsHDR() ? VK_FORMAT_R32G32B32A32_SFLOAT : VK_FORMAT_R8G8B8A8_UNORM;
 		int w = tex->GetWidth();
 		int h = tex->GetHeight();
 

src/common/textures/textures.h

@@ -217,6 +217,7 @@ class FTexture : public RefCountedBase
 
 	bool Masked = false;			// Texture (might) have holes
 	bool bHasCanvas = false;
+	bool bHdr = false; 				// only canvas textures for now.
 	int8_t bTranslucent = -1;
 	int8_t areacount = 0;			// this is capped at 4 sections.
 
@@ -253,6 +254,8 @@ class FTexture : public RefCountedBase
 	bool isHardwareCanvas() const { return bHasCanvas; }	// There's two here so that this can deal with software canvases in the hardware renderer later.
 	bool isCanvas() const { return bHasCanvas; }
 
+	bool IsHDR() const { return bHdr; }
+
 	int GetSourceLump() { return SourceLump; }	// needed by the scripted GetName method.
 	void SetSourceLump(int sl) { SourceLump  = sl; }
 	bool FindHoles(const unsigned char * buffer, int w, int h);
@@ -345,6 +348,12 @@ class FCanvasTexture : public FTexture
 	float aspectRatio;
 
 	friend struct FCanvasTextureInfo;
+	friend class FTextureAnimator;
+
+private:
+	void SetHDR(bool hdr) {
+		bHdr = hdr;
+	}
 };
 
 

src/gamedata/textures/animations.cpp

@@ -742,6 +742,17 @@ void FTextureAnimator::ParseCameraTexture(FScanner &sc)
 		TexMan.AddGameTexture (viewer);
 	}
 	if (sc.GetString())
+	{
+		if (sc.Compare ("hdr"))
+		{
+			canvas->SetHDR(true);
+		}
+		else
+		{
+			sc.UnGet();
+		}
+	}
+	if (sc.GetString())
 	{
 		if (sc.Compare ("fit"))
 		{