VK: Whenever safely possible, shrink the render area.

We just set the render area to the union of the scissor rects used in a pass.

Might help some games on some mobile hardware, a little bit.

Possibly #13464?

Common/GPU/Vulkan/VulkanQueueRunner.cpp

@@ -633,7 +633,9 @@ std::string VulkanQueueRunner::StepToString(const VKRStep &step) const {
 	{
 		int w = step.render.framebuffer ? step.render.framebuffer->width : vulkan_->GetBackbufferWidth();
 		int h = step.render.framebuffer ? step.render.framebuffer->height : vulkan_->GetBackbufferHeight();
-		snprintf(buffer, sizeof(buffer), "RENDER %s (draws: %d, %dx%d, fb: %p, )", step.tag, step.render.numDraws, w, h, step.render.framebuffer);
+		int actual_w = step.render.renderArea.extent.width;
+		int actual_h = step.render.renderArea.extent.height;
+		snprintf(buffer, sizeof(buffer), "RENDER %s (draws: %d, %dx%d/%dx%d, fb: %p, )", step.tag, step.render.numDraws, actual_w, actual_h, w, h, step.render.framebuffer);
 		break;
 	}
 	case VKRStepType::COPY:
@@ -1414,6 +1416,8 @@ void VulkanQueueRunner::PerformBindFramebufferAsRenderTarget(const VKRStep &step
 		}
 	} else {
 		framebuf = backbuffer_;
+
+		// Raw, rotated backbuffer size.
 		w = vulkan_->GetBackbufferWidth();
 		h = vulkan_->GetBackbufferHeight();
 		renderPass = GetBackbufferRenderPass();
@@ -1426,10 +1430,20 @@ void VulkanQueueRunner::PerformBindFramebufferAsRenderTarget(const VKRStep &step
 	VkRenderPassBeginInfo rp_begin = { VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO };
 	rp_begin.renderPass = renderPass;
 	rp_begin.framebuffer = framebuf;
-	rp_begin.renderArea.offset.x = 0;
-	rp_begin.renderArea.offset.y = 0;
-	rp_begin.renderArea.extent.width = w;
-	rp_begin.renderArea.extent.height = h;
+
+	VkRect2D rc = step.render.renderArea;
+	if (!step.render.framebuffer) {
+		// Rendering to backbuffer, must rotate, just like scissors.
+		DisplayRect<int> rotated_rc{ rc.offset.x, rc.offset.y, (int)rc.extent.width, (int)rc.extent.height };
+		RotateRectToDisplay(rotated_rc, vulkan_->GetBackbufferWidth(), vulkan_->GetBackbufferHeight());
+
+		rc.offset.x = rotated_rc.x;
+		rc.offset.y = rotated_rc.y;
+		rc.extent.width = rotated_rc.w;
+		rc.extent.height = rotated_rc.h;
+	}
+
+	rp_begin.renderArea = rc;
 	rp_begin.clearValueCount = numClearVals;
 	rp_begin.pClearValues = numClearVals ? clearVal : nullptr;
 	vkCmdBeginRenderPass(cmd, &rp_begin, VK_SUBPASS_CONTENTS_INLINE);

Common/GPU/Vulkan/VulkanQueueRunner.h

@@ -152,6 +152,7 @@ struct VKRStep {
 			VkImageLayout finalColorLayout;
 			VkImageLayout finalDepthStencilLayout;
 			u32 pipelineFlags;
+			VkRect2D renderArea;
 		} render;
 		struct {
 			VKRFramebuffer *src;

Common/GPU/Vulkan/VulkanRenderManager.cpp

@@ -260,8 +260,8 @@ void VulkanRenderManager::CreateBackbuffers() {
 	if (InitDepthStencilBuffer(cmdInit)) {
 		InitBackbufferFramebuffers(vulkan_->GetBackbufferWidth(), vulkan_->GetBackbufferHeight());
 	}
-	curWidth_ = -1;
-	curHeight_ = -1;
+	curWidthRaw_ = -1;
+	curHeightRaw_ = -1;
 
 	if (HasBackbuffers()) {
 		VLOG("Backbuffers Created");
@@ -529,6 +529,14 @@ void VulkanRenderManager::EndCurRenderStep() {
 	// We'll often be able to avoid loading/saving the depth/stencil buffer.
 	if (curRenderStep_) {
 		curRenderStep_->render.pipelineFlags = curPipelineFlags_;
+		// We don't do this optimization for very small targets, probably not worth it.
+		if (!curRenderArea_.Empty() && (curWidth_ > 32 && curHeight_ > 32)) {
+			curRenderStep_->render.renderArea = curRenderArea_.ToVkRect2D();
+		} else {
+			curRenderStep_->render.renderArea.offset = {};
+			curRenderStep_->render.renderArea.extent = { (uint32_t)curWidth_, (uint32_t)curHeight_ };
+		}
+		curRenderArea_.Reset();
 
 		// We no longer have a current render step.
 		curRenderStep_ = nullptr;
@@ -638,11 +646,20 @@ void VulkanRenderManager::BindFramebufferAsRenderTarget(VKRFramebuffer *fb, VKRR
 	curStepHasViewport_ = false;
 	curStepHasScissor_ = false;
 	if (fb) {
+		curWidthRaw_ = fb->width;
+		curHeightRaw_ = fb->height;
 		curWidth_ = fb->width;
 		curHeight_ = fb->height;
 	} else {
-		curWidth_ = vulkan_->GetBackbufferWidth();
-		curHeight_ = vulkan_->GetBackbufferHeight();
+		curWidthRaw_ = vulkan_->GetBackbufferWidth();
+		curHeightRaw_ = vulkan_->GetBackbufferHeight();
+		if (g_display_rotation == DisplayRotation::ROTATE_90 || g_display_rotation == DisplayRotation::ROTATE_270) {
+			curWidth_ = curHeightRaw_;
+			curHeight_ = curWidthRaw_;
+		} else {
+			curWidth_ = curWidthRaw_;
+			curHeight_ = curHeightRaw_;
+		}
 	}
 
 	// See above - we add a clear afterward if only one side for depth/stencil CLEAR/KEEP.
@@ -944,6 +961,8 @@ void VulkanRenderManager::Clear(uint32_t clearColor, float clearZ, int clearSten
 		data.clear.clearMask = clearMask;
 		curRenderStep_->commands.push_back(data);
 	}
+
+	curRenderArea_.SetRect(0, 0, curWidth_, curHeight_);
 }
 
 void VulkanRenderManager::CopyFramebuffer(VKRFramebuffer *src, VkRect2D srcRect, VKRFramebuffer *dst, VkOffset2D dstPos, VkImageAspectFlags aspectMask, const char *tag) {

Common/GPU/Vulkan/VulkanRenderManager.h

@@ -61,6 +61,53 @@ enum {
 	MAX_TIMESTAMP_QUERIES = 128,
 };
 
+struct BoundingRect {
+	int x1;
+	int y1;
+	int x2;
+	int y2;
+
+	BoundingRect() {
+		Reset();
+	}
+
+	void Reset() {
+		x1 = 65535;
+		y1 = 65535;
+		x2 = -65535;
+		y2 = -65535;
+	}
+
+	bool Empty() const {
+		return x2 < 0;
+	}
+
+	void SetRect(int x, int y, int width, int height) {
+		x1 = x;
+		y1 = y;
+		x2 = width;
+		y2 = height;
+	}
+
+	void Apply(const VkRect2D &rect) {
+		if (rect.offset.x < x1) x1 = rect.offset.x;
+		if (rect.offset.y < y1) y1 = rect.offset.y;
+		int rect_x2 = rect.offset.x + rect.extent.width;
+		int rect_y2 = rect.offset.y + rect.extent.height;
+		if (rect_x2 > x2) x2 = rect_x2;
+		if (rect_y2 > y2) y2 = rect_y2;
+	}
+
+	VkRect2D ToVkRect2D() const {
+		VkRect2D rect;
+		rect.offset.x = x1;
+		rect.offset.y = y1;
+		rect.extent.width = x2 - x1;
+		rect.extent.height = y2 - y1;
+		return rect;
+	}
+};
+
 class VulkanRenderManager {
 public:
 	VulkanRenderManager(VulkanContext *vulkan);
@@ -131,10 +178,22 @@ public:
 		curStepHasViewport_ = true;
 	}
 
-	void SetScissor(const VkRect2D &rc) {
+	void SetScissor(VkRect2D rc) {
 		_dbg_assert_(curRenderStep_ && curRenderStep_->stepType == VKRStepType::RENDER);
 		_dbg_assert_((int)rc.extent.width >= 0);
 		_dbg_assert_((int)rc.extent.height >= 0);
+
+		// Clamp to curWidth_/curHeight_. Apparently an issue.
+		if ((int)(rc.offset.x + rc.extent.width) > curWidth_) {
+			rc.extent.width = curWidth_ - rc.offset.x;
+		}
+		if ((int)(rc.offset.y + rc.extent.height) > curHeight_) {
+			rc.extent.height = curHeight_ - rc.offset.y;
+		}
+		_dbg_assert_((int)(rc.offset.x + rc.extent.width) <= curWidth_);
+		_dbg_assert_((int)(rc.offset.y + rc.extent.height) <= curHeight_);
+		curRenderArea_.Apply(rc);
+
 		VkRenderData data{ VKRRenderCommand::SCISSOR };
 		data.scissor.scissor = rc;
 		curRenderStep_->commands.push_back(data);
@@ -323,8 +382,15 @@ private:
 	int outOfDateFrames_ = 0;
 
 	// Submission time state
+
+	// Note: These are raw backbuffer-sized. Rotated.
+	int curWidthRaw_ = -1;
+	int curHeightRaw_ = -1;
+
+	// Pre-rotation (as you'd expect).
 	int curWidth_ = -1;
 	int curHeight_ = -1;
+
 	bool insideFrame_ = false;
 	// This is the offset within this frame, in case of a mid-frame sync.
 	int renderStepOffset_ = 0;
@@ -332,6 +398,7 @@ private:
 	bool curStepHasViewport_ = false;
 	bool curStepHasScissor_ = false;
 	u32 curPipelineFlags_ = 0;
+	BoundingRect curRenderArea_;
 
 	std::vector<VKRStep *> steps_;
 	bool splitSubmit_ = false;

GPU/Vulkan/DebugVisVulkan.cpp

@@ -19,8 +19,8 @@
 #include "Common/GPU/thin3d.h"
 #include "Common/UI/Context.h"
 #include "Common/UI/View.h"
-#include "Common/System/System.h"
 #include "Common/System/Display.h"
+#include "Common/System/System.h"
 
 #include "DebugVisVulkan.h"
 #include "Common/GPU/Vulkan/VulkanMemory.h"
@@ -100,7 +100,7 @@ void DrawAllocatorVis(UIContext *ui, GPUInterface *gpu) {
 		iter->Release();
 }
 
-void DrawProfilerVis(UIContext *ui, GPUInterface *gpu) {
+void DrawGPUProfilerVis(UIContext *ui, GPUInterface *gpu) {
 	if (!gpu) {
 		return;
 	}

GPU/Vulkan/DebugVisVulkan.h

@@ -24,4 +24,4 @@ class UIContext;
 
 // gpu MUST be an instance of GPU_Vulkan. If not, will definitely crash.
 void DrawAllocatorVis(UIContext *ui, GPUInterface *gpu);
-void DrawProfilerVis(UIContext *ui, GPUInterface *gpu);
+void DrawGPUProfilerVis(UIContext *ui, GPUInterface *gpu);

UI/EmuScreen.cpp

@@ -1574,7 +1574,7 @@ void EmuScreen::renderUI() {
 	}
 
 	if (g_Config.iGPUBackend == (int)GPUBackend::VULKAN && g_Config.bShowGpuProfile) {
-		DrawProfilerVis(ctx, gpu);
+		DrawGPUProfilerVis(ctx, gpu);
 	}
 
 #endif