GE Debugger D3D11: Support displaying the current texture

GPU/Common/TextureCacheCommon.h

@@ -206,6 +206,8 @@ public:
 		return PSP_CoreParameter().compat.flags().FakeMipmapChange && gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST;
 	}
 
+	virtual bool GetCurrentTextureDebug(GPUDebugBuffer &buffer, int level) { return false; }
+
 protected:
 	virtual void BindTexture(TexCacheEntry *entry) = 0;
 	virtual void Unbind() = 0;

GPU/D3D11/GPU_D3D11.cpp

@@ -1054,10 +1054,7 @@ bool GPU_D3D11::GetCurrentTexture(GPUDebugBuffer &buffer, int level) {
 	if (!gstate.isTextureMapEnabled()) {
 		return false;
 	}
-
-	// TODO: Implement!
-
-	return false;
+	return textureCacheD3D11_->GetCurrentTextureDebug(buffer, level);
 }
 
 bool GPU_D3D11::GetCurrentClut(GPUDebugBuffer &buffer) {

GPU/D3D11/TextureCacheD3D11.cpp

@@ -769,3 +769,48 @@ bool TextureCacheD3D11::DecodeTexture(u8 *output, const GPUgstate &state) {
 	OutputDebugStringA("TextureCache::DecodeTexture : FixMe\r\n");
 	return true;
 }
+
+bool TextureCacheD3D11::GetCurrentTextureDebug(GPUDebugBuffer &buffer, int level) {
+	ApplyTexture();
+	SetTexture(false);
+	if (!nextTexture_)
+		return false;
+
+	ID3D11Texture2D *texture = (ID3D11Texture2D *)nextTexture_->texturePtr;
+	if (!texture)
+		return false;
+
+	D3D11_TEXTURE2D_DESC desc;
+	texture->GetDesc(&desc);
+
+	if (desc.Format != DXGI_FORMAT_B8G8R8A8_UNORM) {
+		// TODO: Support the other formats
+		return false;
+	}
+
+	desc.BindFlags = 0;
+	desc.Usage = D3D11_USAGE_STAGING;
+	desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
+
+	ID3D11Texture2D *stagingCopy = nullptr;
+	device_->CreateTexture2D(&desc, nullptr, &stagingCopy);
+	context_->CopyResource(stagingCopy, texture);
+
+	int width = desc.Width >> level;
+	int height = desc.Height >> level;
+	buffer.Allocate(width, height, GPU_DBG_FORMAT_8888);
+
+	D3D11_MAPPED_SUBRESOURCE map;
+	if (FAILED(context_->Map(stagingCopy, level, D3D11_MAP_READ, 0, &map))) {
+		stagingCopy->Release();
+		return false;
+	}
+
+	for (int y = 0; y < height; y++) {
+		memcpy(buffer.GetData() + 4 * width * y, (const uint8_t *)map.pData + map.RowPitch * y, 4 * width);
+	}
+
+	context_->Unmap(stagingCopy, level);
+	stagingCopy->Release();
+	return true;
+}

GPU/D3D11/TextureCacheD3D11.h

@@ -64,6 +64,7 @@ public:
 	void InvalidateLastTexture(TexCacheEntry *entry = nullptr) override;
 
 	void SetFramebufferSamplingParams(u16 bufferWidth, u16 bufferHeight, SamplerCacheKey &key);
+	bool GetCurrentTextureDebug(GPUDebugBuffer &buffer, int level) override;
 
 protected:
 	void BindTexture(TexCacheEntry *entry) override;

GPU/GPUCommon.cpp

@@ -2149,3 +2149,7 @@ bool GPUCommon::GetCurrentStencilbuffer(GPUDebugBuffer &buffer) {
 bool GPUCommon::GetOutputFramebuffer(GPUDebugBuffer &buffer) {
 	return framebufferManager_->GetOutputFramebuffer(buffer);
 }
+
+bool GPUCommon::GetCurrentTexture(GPUDebugBuffer &buffer, int level) {
+	return textureCache_->GetCurrentTextureDebug(buffer, level);
+}

GPU/GPUCommon.h

@@ -165,6 +165,7 @@ public:
 	bool GetCurrentFramebuffer(GPUDebugBuffer &buffer, GPUDebugFramebufferType type, int maxRes) override;
 	bool GetCurrentDepthbuffer(GPUDebugBuffer &buffer) override;
 	bool GetCurrentStencilbuffer(GPUDebugBuffer &buffer) override;
+	bool GetCurrentTexture(GPUDebugBuffer &buffer, int level) override;
 	bool GetOutputFramebuffer(GPUDebugBuffer &buffer) override;
 
 	std::vector<DisplayList> ActiveDisplayLists() override;