修正了D3D12显示GIF动画示例中子帧画面渲染未偏移的错误，现在显示各种GIF都正常了

11-MultiThreadAndAdapter/Shader/11-QuadVS.hlsl

-//ˮʻЧShader
 struct PSInput
 {
 	float4 m_v4Pos	: SV_POSITION;

12-D2DWriteOnD3D12/12-D2DWriteOnD3D12.cpp

@@ -335,7 +335,7 @@ int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR    l
 	ComPtr<ID3D12Resource>				pIVBQuadUpload;
 	D3D12_VERTEX_BUFFER_VIEW			pstVBVQuad;
 	SIZE_T								szSecondPassCB = GRS_UPPER(sizeof(ST_GRS_PEROBJECT_CB), 256);
-	ST_GRS_PEROBJECT_CB* pstCBSecondPass = nullptr;
+	ST_GRS_PEROBJECT_CB*				pstCBSecondPass = nullptr;
 	ComPtr<ID3D12Resource>				pICBResSecondPass;
 	ComPtr<ID3D12Resource>				pINoiseTexture;
 	ComPtr<ID3D12Resource>				pINoiseTextureUpload;

13-ShowGIFAndResourceStatus/13-ShowGIFAndResourceStatus.cpp

@@ -264,9 +264,11 @@ struct ST_GRS_FRAME_MVP_BUFFER
 
 struct ST_GRS_GIF_FRAME_PARAM
 {
+	XMFLOAT4 m_c4BkColor;
+	UINT	 m_nLeftTop[2];
+	UINT	 m_nFrameWH[2];
 	UINT	 m_nFrame;
 	UINT 	 m_nDisposal;
-	XMFLOAT4 m_c4BkColor;
 };
 
 enum EM_GRS_DISPOSAL_METHODS
@@ -306,7 +308,9 @@ struct ST_GRS_GIF_FRAME
 	DXGI_FORMAT						m_enTextureFormat;
 	UINT							m_nFrameDisposal;
 	UINT							m_nFrameDelay;
-	ST_GRS_RECT_F					m_rtGIFFrame;
+	UINT						    m_nLeftTop[2];
+	UINT							m_nFrameWH[2];
+	//ST_GRS_RECT_F					m_rtGIFFrame;
 };
 //--------------------------------------------------------------------------------------------------
 
@@ -393,7 +397,6 @@ int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCm
 		ComPtr<ID3D12Resource>				pITextureUpload;
 		ComPtr<ID3D12DescriptorHeap>		pISRVHeap;
 
-
 		ComPtr<ID3D12Resource>				pICBGIFFrameInfo; // Computer Shader Const Buffer 
 
 		SIZE_T								szGIFFrameInfo = GRS_UPPER(sizeof(ST_GRS_GIF_FRAME_PARAM), 256);
@@ -1284,6 +1287,11 @@ int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCm
 							, GRS_ARGB_A(g_stGIF.m_nBkColor));
 						pstGIFFrameInfo->m_nFrame = g_stGIF.m_nCurrentFrame;
 						pstGIFFrameInfo->m_nDisposal = stGIFFrame.m_nFrameDisposal;
+						
+						pstGIFFrameInfo->m_nLeftTop[0] = stGIFFrame.m_nLeftTop[0];	//Frame Image Left
+						pstGIFFrameInfo->m_nLeftTop[1] = stGIFFrame.m_nLeftTop[1];	//Frame Image Top
+						pstGIFFrameInfo->m_nFrameWH[0] = stGIFFrame.m_nFrameWH[0];	//Frame Image Width
+						pstGIFFrameInfo->m_nFrameWH[1] = stGIFFrame.m_nFrameWH[1];	//Frame Image Height
 
 						D3D12_SHADER_RESOURCE_VIEW_DESC stSRVDesc = {};
 						stSRVDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
@@ -1339,7 +1347,9 @@ int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCm
 						pICSList->SetComputeRootDescriptorTable(2, stSRVGPUHandle);
 
 						// Computer!
-						pICSList->Dispatch(g_stGIF.m_nWidth, g_stGIF.m_nHeight, 1);
+						// 注意：按子帧大小来发起计算线程
+						pICSList->Dispatch(stGIFFrame.m_nFrameWH[0], stGIFFrame.m_nFrameWH[1],1);
+						//pICSList->Dispatch(g_stGIF.m_nWidth, g_stGIF.m_nHeight, 1);
 
 						// 开始计算管线运行
 						D3D12_RESOURCE_BARRIER stRWResEndBarrier = {};
@@ -1673,7 +1683,7 @@ BOOL LoadGIFFrame(IWICImagingFactory* pIWICFactory, ST_GRS_GIF& g_stGIF, ST_GRS_
 		{
 			if (VT_UI2 == stCOMPropValue.vt)
 			{
-				stGIFFrame.m_rtGIFFrame.m_fLeft = static_cast<FLOAT>(stCOMPropValue.uiVal);
+				stGIFFrame.m_nLeftTop[0] = static_cast<UINT>(stCOMPropValue.uiVal);
 			}
 		}
 		PropVariantClear(&stCOMPropValue);
@@ -1682,7 +1692,7 @@ BOOL LoadGIFFrame(IWICImagingFactory* pIWICFactory, ST_GRS_GIF& g_stGIF, ST_GRS_
 		{
 			if (VT_UI2 == stCOMPropValue.vt)
 			{
-				stGIFFrame.m_rtGIFFrame.m_fTop = static_cast<FLOAT>(stCOMPropValue.uiVal);
+				stGIFFrame.m_nLeftTop[1] = static_cast<UINT>(stCOMPropValue.uiVal);
 			}
 		}
 		PropVariantClear(&stCOMPropValue);
@@ -1691,8 +1701,7 @@ BOOL LoadGIFFrame(IWICImagingFactory* pIWICFactory, ST_GRS_GIF& g_stGIF, ST_GRS_
 		{
 			if (VT_UI2 == stCOMPropValue.vt)
 			{
-				stGIFFrame.m_rtGIFFrame.m_fRight = static_cast<FLOAT>(stCOMPropValue.uiVal)
-					+ stGIFFrame.m_rtGIFFrame.m_fLeft;
+				stGIFFrame.m_nFrameWH[0] = static_cast<UINT>(stCOMPropValue.uiVal);
 			}
 		}
 		PropVariantClear(&stCOMPropValue);
@@ -1701,8 +1710,7 @@ BOOL LoadGIFFrame(IWICImagingFactory* pIWICFactory, ST_GRS_GIF& g_stGIF, ST_GRS_
 		{
 			if (VT_UI2 == stCOMPropValue.vt)
 			{
-				stGIFFrame.m_rtGIFFrame.m_fBottom = static_cast<FLOAT>(stCOMPropValue.uiVal)
-					+ stGIFFrame.m_rtGIFFrame.m_fTop;
+				stGIFFrame.m_nFrameWH[1] = static_cast<UINT>(stCOMPropValue.uiVal);
 			}
 		}
 		PropVariantClear(&stCOMPropValue);
@@ -1751,6 +1759,11 @@ BOOL UploadGIFFrame(ID3D12Device4* pID3D12Device4, ID3D12GraphicsCommandList* pI
 		//获得图片大小（单位：像素）
 		GRS_THROW_IF_FAILED(stGIFFrame.m_pIWICGIFFrameBMP->GetSize(&nTextureW, &nTextureH));
 
+		if (nTextureW != stGIFFrame.m_nFrameWH[0] || nTextureH != stGIFFrame.m_nFrameWH[1])
+		{//从属性解析出的帧画面大小与转换后的画面大小不一致
+			throw CGRSCOMException(S_FALSE);
+		}
+		
 		//获取图片像素的位大小的BPP（Bits Per Pixel）信息，用以计算图片行数据的真实大小（单位：字节）
 		ComPtr<IWICComponentInfo> pIWICmntinfo;
 		WICPixelFormatGUID stGuidTargetFormat = {};

13-ShowGIFAndResourceStatus/Shader/13-ShowGIF_CS.hlsl

 
 cbuffer ST_GRS_GIF_FRAME_PARAM : register(b0)
 {
-	uint m_nFrame;
-	uint m_nDisposal;
-	float4 m_c4BkColor;
+	float4	m_c4BkColor;		
+	uint2	m_nLeftTop;
+	uint2	m_nFrameWH;
+	uint	m_nFrame;
+	uint	m_nDisposal;
 };
 
+// 帧纹理，尺寸就是当前帧画面的大小，注意这个往往不是整个GIF的大小
 Texture2D			g_tGIFFrame : register(t0);
+
+// 最终代表整个GIF画板纹理，大小就是整个GIF的大小
 RWTexture2D<float4> g_tPaint	: register(u0);
 
 [numthreads(1, 1, 1)]
 void ShowGIFCS( uint3 n3ThdID : SV_DispatchThreadID)
 {
-	if (0 == m_nFrame)
-	{// 第一帧时用背景色擦除一下先
+	if ( 0 == m_nFrame )
+	{// 第一帧时用背景色整个绘制一下先，相当于一个Clear操作
 		g_tPaint[n3ThdID.xy] = m_c4BkColor;
 	}
 
-	if ( 2 == m_nDisposal )
-	{//DM_BACKGROUND 用背景色填充整个画面，相当于一个Clear操作，因为命令列表中的ClearUAV命令只能设置一个float值，所以放到这里来清除背景
-		g_tPaint[n3ThdID.xy] = m_c4BkColor;
+	// 注意画板的像素坐标需要偏移，画板坐标是：m_nLeftTop.xy + n3ThdID.xy
+	// m_nLeftTop.xy就是当前帧相对于整个画板左上角的偏移值
+	// n3ThdID.xy就是当前帧中对应要绘制的像素点坐标
+
+	if ( 0 == m_nDisposal )
+	{//DM_NONE 不清理背景
+		g_tPaint[ m_nLeftTop.xy + n3ThdID.xy ] = g_tGIFFrame[n3ThdID.xy];
 	}
-	else if (0 == m_nDisposal || 1 == m_nDisposal)
-	{//DM_UNDEFINED or DM_NONE 不清楚背景，直接在原来画面基础上进行Alpha混色绘制
-		// Simple Alpha Blending
-		g_tPaint[n3ThdID.xy] = g_tGIFFrame[n3ThdID.xy].w * g_tGIFFrame[n3ThdID.xy]
-			+ (1.0f - g_tGIFFrame[n3ThdID.xy].w) * g_tPaint[n3ThdID.xy];
+	else if (1 == m_nDisposal)
+	{//DM_UNDEFINED 直接在原来画面基础上进行Alpha混色绘制
+		// 注意g_tGIFFrame[n3ThdID.xy].w只是简单的0或1值，所以没必要进行真正的Alpha混色计算
+		// 但这里也没有使用IF Else判断，而是用了开销更小的?:三元表达式来进行计算
+		g_tPaint[ m_nLeftTop.xy + n3ThdID.xy ] 
+			= g_tGIFFrame[n3ThdID.xy].w ? g_tGIFFrame[n3ThdID.xy] : g_tPaint[m_nLeftTop.xy + n3ThdID.xy];
+	}
+	else if ( 2 == m_nDisposal )
+	{// DM_BACKGROUND 用背景色填充画板，然后绘制，相当于用背景色进行Alpha混色，过程同上
+		g_tPaint[m_nLeftTop.xy + n3ThdID.xy] = g_tGIFFrame[n3ThdID.xy].w ? g_tGIFFrame[n3ThdID.xy] : m_c4BkColor;
+	}
+
+	else if( 3 == m_nDisposal )
+	{// DM_PREVIOUS 保留前一帧
+		g_tPaint[ m_nLeftTop.xy + n3ThdID.xy ] = g_tPaint[n3ThdID.xy + m_nLeftTop.xy];
 	}
 }
\ No newline at end of file

5-SkyBox/5-SkyBox.cpp

@@ -1463,7 +1463,7 @@ int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR    l
 						, XMLoadFloat3(&g_f3HeapUp));
 
 					XMMATRIX xmProj = XMMatrixPerspectiveFovLH(XM_PIDIV4
-						, (FLOAT)iWndWidth / (FLOAT)iWndHeight, 1.0f, 20000.0f);
+						, (FLOAT)iWndWidth / (FLOAT)iWndHeight, 1.0f, 2000.0f);
 					//使用“Assets\\sky_cube.dds”时需要XMMATRIX(1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1)乘以xmView
 					XMMATRIX xmSkyBox = xmView;// XMMatrixMultiply(XMMATRIX(1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1), xmView);
 					xmSkyBox = XMMatrixMultiply(xmSkyBox, xmProj);