Add an interface to grab the depth/stencil buffers.

Not sure yet how to show in UI, not well tested...

GPU/Common/GPUDebugInterface.h

@@ -30,11 +30,28 @@ struct GPUDebugOp {
 	std::string desc;
 };
 
+enum GPUDebugBufferFormat {
+	// These match GEBufferFormat.
+	GPU_DBG_FORMAT_565 = 0,
+	GPU_DBG_FORMAT_5551 = 1,
+	GPU_DBG_FORMAT_4444 = 2,
+	GPU_DBG_FORMAT_8888 = 3,
+	GPU_DBG_FORMAT_INVALID = 0xFF,
+
+	// These don't, they're for depth buffers.
+	GPU_DBG_FORMAT_FLOAT = 0x10,
+	GPU_DBG_FORMAT_16BIT = 0x11,
+};
+
 struct GPUDebugBuffer {
 	GPUDebugBuffer() : alloc_(false), data_(NULL) {
 	}
 
 	GPUDebugBuffer(void *data, u32 stride, u32 height, GEBufferFormat fmt)
+		: alloc_(false), data_((u8 *)data), stride_(stride), height_(height), fmt_(GPUDebugBufferFormat(fmt)), flipped_(false) {
+	}
+
+	GPUDebugBuffer(void *data, u32 stride, u32 height, GPUDebugBufferFormat fmt)
 		: alloc_(false), data_((u8 *)data), stride_(stride), height_(height), fmt_(fmt), flipped_(false) {
 	}
 
@@ -70,6 +87,10 @@ struct GPUDebugBuffer {
 	}
 
 	void Allocate(u32 stride, u32 height, GEBufferFormat fmt, bool flipped = false) {
+		Allocate(stride, height, GPUDebugBufferFormat(fmt), flipped);
+	}
+
+	void Allocate(u32 stride, u32 height, GPUDebugBufferFormat fmt, bool flipped = false) {
 		if (alloc_ && stride_ == stride && height_ == height && fmt_ == fmt) {
 			// Already allocated the right size.
 			flipped_ = flipped;
@@ -84,7 +105,7 @@ struct GPUDebugBuffer {
 		flipped_ = flipped;
 
 		u32 pixelSize = 2;
-		if (fmt == GE_FORMAT_8888) {
+		if (fmt == GPU_DBG_FORMAT_8888 || fmt == GPU_DBG_FORMAT_FLOAT) {
 			pixelSize = 4;
 		};
 
@@ -114,7 +135,7 @@ struct GPUDebugBuffer {
 		return flipped_;
 	}
 
-	GEBufferFormat GetFormat() const {
+	GPUDebugBufferFormat GetFormat() const {
 		return fmt_;
 	}
 
@@ -124,7 +145,7 @@ private:
 	u32 height_;
 	u32 stride_;
 	bool flipped_;
-	GEBufferFormat fmt_;
+	GPUDebugBufferFormat fmt_;
 };
 
 class GPUDebugInterface {
@@ -153,6 +174,16 @@ public:
 		return false;
 	}
 
+	// Similar to GetCurrentFramebuffer().
+	virtual bool GetCurrentDepthbuffer(GPUDebugBuffer &buffer) {
+		return false;
+	}
+
+	// Similar to GetCurrentFramebuffer().
+	virtual bool GetCurrentStencilbuffer(GPUDebugBuffer &buffer) {
+		return false;
+	}
+
 	// Similar to GetCurrentFramebuffer().
 	virtual bool GetCurrentTexture(GPUDebugBuffer &buffer) {
 		return false;

GPU/GLES/Framebuffer.cpp

@@ -1342,8 +1342,7 @@ void FramebufferManager::Resized() {
 	resized_ = true;
 }
 
-bool FramebufferManager::GetCurrentFramebuffer(GPUDebugBuffer &buffer)
-{
+bool FramebufferManager::GetCurrentFramebuffer(GPUDebugBuffer &buffer) {
 	u32 fb_address = (gstate.fbptr & 0xFFFFFF) | ((gstate.fbwidth & 0xFF0000) << 8);
 	int fb_stride = gstate.fbwidth & 0x3C0;
 
@@ -1366,3 +1365,62 @@ bool FramebufferManager::GetCurrentFramebuffer(GPUDebugBuffer &buffer)
 
 	return true;
 }
+
+bool FramebufferManager::GetCurrentDepthbuffer(GPUDebugBuffer &buffer) {
+	u32 fb_address = (gstate.fbptr & 0xFFFFFF) | ((gstate.fbwidth & 0xFF0000) << 8);
+	int fb_stride = gstate.fbwidth & 0x3C0;
+
+	u32 z_address = (gstate.zbptr & 0xFFFFFF) | ((gstate.zbwidth & 0xFF0000) << 8);
+	int z_stride = gstate.zbwidth & 0x3C0;
+
+	VirtualFramebuffer *vfb = currentRenderVfb_;
+	if (!vfb) {
+		vfb = GetVFBAt(fb_address);
+	}
+
+	if (!vfb) {
+		// If there's no vfb and we're drawing there, must be memory?
+		buffer = GPUDebugBuffer(Memory::GetPointer(z_address), z_stride, 512, GPU_DBG_FORMAT_16BIT);
+		return true;
+	}
+
+#ifndef USING_GLES2
+	buffer.Allocate(vfb->renderWidth, vfb->renderHeight, GPU_DBG_FORMAT_FLOAT, true);
+
+	fbo_bind_for_read(vfb->fbo);
+	glPixelStorei(GL_PACK_ALIGNMENT, 4);
+	glReadPixels(0, 0, vfb->renderWidth, vfb->renderHeight, GL_DEPTH_COMPONENT, GL_FLOAT, buffer.GetData());
+
+	return true;
+#else
+	return false;
+#endif
+}
+
+bool FramebufferManager::GetCurrentStencilbuffer(GPUDebugBuffer &buffer) {
+	u32 fb_address = (gstate.fbptr & 0xFFFFFF) | ((gstate.fbwidth & 0xFF0000) << 8);
+	int fb_stride = gstate.fbwidth & 0x3C0;
+
+	VirtualFramebuffer *vfb = currentRenderVfb_;
+	if (!vfb) {
+		vfb = GetVFBAt(fb_address);
+	}
+
+	if (!vfb) {
+		// If there's no vfb and we're drawing there, must be memory?
+		buffer = GPUDebugBuffer(Memory::GetPointer(fb_address), fb_stride, 512, GPU_DBG_FORMAT_8888);
+		return true;
+	}
+
+#ifndef USING_GLES2
+	buffer.Allocate(vfb->renderWidth, vfb->renderHeight, GPU_DBG_FORMAT_16BIT, true);
+
+	fbo_bind_for_read(vfb->fbo);
+	glPixelStorei(GL_PACK_ALIGNMENT, 2);
+	glReadPixels(0, 0, vfb->renderWidth, vfb->renderHeight, GL_STENCIL_INDEX, GL_UNSIGNED_SHORT, buffer.GetData());
+
+	return true;
+#else
+	return false;
+#endif
+}

GPU/GLES/Framebuffer.h

@@ -171,6 +171,8 @@ public:
 	void DestroyFramebuf(VirtualFramebuffer *vfb);
 
 	bool GetCurrentFramebuffer(GPUDebugBuffer &buffer);
+	bool GetCurrentDepthbuffer(GPUDebugBuffer &buffer);
+	bool GetCurrentStencilbuffer(GPUDebugBuffer &buffer);
 
 private:
 	void CompileDraw2DProgram();

GPU/GLES/GLES_GPU.cpp

@@ -1519,6 +1519,14 @@ bool GLES_GPU::GetCurrentFramebuffer(GPUDebugBuffer &buffer) {
 	return framebufferManager_.GetCurrentFramebuffer(buffer);
 }
 
+bool GLES_GPU::GetCurrentDepthbuffer(GPUDebugBuffer &buffer) {
+	return framebufferManager_.GetCurrentDepthbuffer(buffer);
+}
+
+bool GLES_GPU::GetCurrentStencilbuffer(GPUDebugBuffer &buffer) {
+	return framebufferManager_.GetCurrentStencilbuffer(buffer);
+}
+
 bool GLES_GPU::GetCurrentTexture(GPUDebugBuffer &buffer) {
 	if (!gstate.isTextureMapEnabled()) {
 		return false;

GPU/GLES/GLES_GPU.h

@@ -67,6 +67,8 @@ public:
 	std::vector<FramebufferInfo> GetFramebufferList();
 
 	bool GetCurrentFramebuffer(GPUDebugBuffer &buffer);
+	bool GetCurrentDepthbuffer(GPUDebugBuffer &buffer);
+	bool GetCurrentStencilbuffer(GPUDebugBuffer &buffer);
 	bool GetCurrentTexture(GPUDebugBuffer &buffer);
 
 protected:

GPU/Software/SoftGpu.h

@@ -78,6 +78,14 @@ public:
 		// TODO
 		return false;
 	}
+	virtual bool GetCurrentDepthbuffer(GPUDebugBuffer &buffer) {
+		// TODO
+		return false;
+	}
+	virtual bool GetCurrentStencilbuffer(GPUDebugBuffer &buffer) {
+		// TODO
+		return false;
+	}
 
 protected:
 	virtual void FastRunLoop(DisplayList &list);