ppsspp/GPU/GLES/Framebuffer.cpp

// Copyright (c) 2012- PPSSPP Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.

#include "gfx_es2/glsl_program.h"
#include "gfx_es2/gl_state.h"
#include "gfx_es2/fbo.h"

#include "math/lin/matrix4x4.h"

#include "Core/Host.h"
#include "Core/MemMap.h"
#include "Core/Config.h"
#include "Core/System.h"
#include "Core/Reporting.h"
#include "GPU/ge_constants.h"
#include "GPU/GPUState.h"

#include "GPU/GLES/Framebuffer.h"
#include "GPU/GLES/TextureCache.h"
#include "GPU/GLES/ShaderManager.h"

#include <algorithm>

#if defined(USING_GLES2)
#ifndef GL_READ_FRAMEBUFFER
#define GL_READ_FRAMEBUFFER GL_FRAMEBUFFER
#define GL_DRAW_FRAMEBUFFER GL_FRAMEBUFFER
#endif
#ifndef GL_RGBA8
#define GL_RGBA8 GL_RGBA
#endif
#ifndef GL_DEPTH_COMPONENT24
#define GL_DEPTH_COMPONENT24 GL_DEPTH_COMPONENT24_OES
#endif
#ifndef GL_DEPTH24_STENCIL8_OES
#define GL_DEPTH24_STENCIL8_OES 0x88F0
#endif
#endif

extern int g_iNumVideos;

static const char tex_fs[] =
	"#ifdef GL_ES\n"
	"precision mediump float;\n"
	"#endif\n"
	"uniform sampler2D sampler0;\n"
	"varying vec2 v_texcoord0;\n"
	"void main() {\n"
	"	gl_FragColor.rgb = texture2D(sampler0, v_texcoord0).rgb;\n"
	"	gl_FragColor.a = 1.0;\n"
	"}\n";

static const char basic_vs[] =
#ifndef USING_GLES2
	"#version 120\n"
#endif
	"attribute vec4 a_position;\n"
	"attribute vec2 a_texcoord0;\n"
	"uniform mat4 u_viewproj;\n"
	"varying vec2 v_texcoord0;\n"
	"void main() {\n"
	"  v_texcoord0 = a_texcoord0;\n"
	"  gl_Position = u_viewproj * a_position;\n"
	"}\n";

// Aggressively delete unused FBO:s to save gpu memory.
enum {
	FBO_OLD_AGE = 5,
};

static bool MaskedEqual(u32 addr1, u32 addr2) {
	return (addr1 & 0x03FFFFFF) == (addr2 & 0x03FFFFFF);
}

inline u16 RGBA8888toRGB565(u32 px) {
	return ((px >> 3) & 0x001F) | ((px >> 5) & 0x07E0) | ((px >> 8) & 0xF800);
}

inline u16 RGBA8888toRGBA4444(u32 px) {
	return ((px >> 4) & 0x000F) | ((px >> 8) & 0x00F0) | ((px >> 12) & 0x0F00) | ((px >> 16) & 0xF000);
}

inline u16 RGBA8888toRGBA5551(u32 px) {
	return ((px >> 3) & 0x001F) | ((px >> 6) & 0x03E0) | ((px >> 9) & 0x7C00) | ((px >> 16) & 0x8000);
}

void ConvertFromRGBA8888(u8 *dst, u8 *src, u32 stride, u32 height, GEBufferFormat format);

void CenterRect(float *x, float *y, float *w, float *h,
                float origW, float origH, float frameW, float frameH)
{
	if (g_Config.bStretchToDisplay)
	{
		*x = 0;
		*y = 0;
		*w = frameW;
		*h = frameH;
		return;
	}

	float origRatio = origW/origH;
	float frameRatio = frameW/frameH;

	if (origRatio > frameRatio)
	{
		// Image is wider than frame. Center vertically.
		float scale = origW / frameW;
		*x = 0.0f;
		*w = frameW;
		*h = frameW / origRatio;
#ifdef BLACKBERRY
		// Stretch a little bit
		if (g_Config.bPartialStretch)
			*h = (frameH + *h) / 2.0f; // (408 + 720) / 2 = 564
#endif
		*y = (frameH - *h) / 2.0f;
	}
	else
	{
		// Image is taller than frame. Center horizontally.
		float scale = origH / frameH;
		*y = 0.0f;
		*h = frameH;
		*w = frameH * origRatio;
		*x = (frameW - *w) / 2.0f;
	}
}

void ClearBuffer() {
	glstate.depthWrite.set(GL_TRUE);
	glstate.colorMask.set(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
	glClearColor(0,0,0,1);
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
}

void DisableState() {
	glstate.blend.disable();
	glstate.cullFace.disable();
	glstate.depthTest.disable();
	glstate.scissorTest.disable();
	glstate.stencilTest.disable();
#if !defined(USING_GLES2)
	glstate.colorLogicOp.disable();
#endif
}

void FramebufferManager::SetNumExtraFBOs(int num) {
	for (size_t i = 0; i < extraFBOs_.size(); i++) {
		fbo_destroy(extraFBOs_[i]);
	}
	extraFBOs_.clear();
	for (int i = 0; i < num; i++) {
		// No depth/stencil for post processing
		FBO *fbo = fbo_create(PSP_CoreParameter().renderWidth, PSP_CoreParameter().renderHeight, 1, false, FBO_8888);
		extraFBOs_.push_back(fbo);
	}
}

void FramebufferManager::CompileDraw2DProgram() {
	if (!draw2dprogram_) {
		SetNumExtraFBOs(0);
		draw2dprogram_ = glsl_create_source(basic_vs, tex_fs);
		glsl_bind(draw2dprogram_);
		glUniform1i(draw2dprogram_->sampler0, 0);

		if (g_Config.bFXAA) {
			useFXAA_ = true;
			fxaaProgram_ = glsl_create("shaders/fxaa.vsh", "shaders/fxaa.fsh");
			glsl_bind(fxaaProgram_);
			glUniform1i(fxaaProgram_->sampler0, 0);
			SetNumExtraFBOs(1);
			float u_delta = 1.0f / PSP_CoreParameter().renderWidth;
			float v_delta = 1.0f / PSP_CoreParameter().renderHeight;
			glUniform2f(glsl_uniform_loc(fxaaProgram_, "u_texcoordDelta"), u_delta, v_delta);
		} else {
			fxaaProgram_ = 0;
			useFXAA_ = false;
		}

		glsl_unbind();
	}
}

void FramebufferManager::DestroyDraw2DProgram() {
	if (draw2dprogram_) {
		glsl_destroy(draw2dprogram_);
		draw2dprogram_ = 0;
		glsl_destroy(fxaaProgram_);
		fxaaProgram_ = 0;
	}
}

FramebufferManager::FramebufferManager() :
	displayFramebufPtr_(0),
	displayStride_(0),
	displayFormat_(GE_FORMAT_565),
	displayFramebuf_(0),
	prevDisplayFramebuf_(0),
	prevPrevDisplayFramebuf_(0),
	frameLastFramebufUsed(0),
	currentRenderVfb_(0),
	drawPixelsTex_(0),
	drawPixelsTexFormat_(GE_FORMAT_INVALID),
	convBuf(0),
	draw2dprogram_(0),
	fxaaProgram_(0),
	textureCache_(0),
	shaderManager_(0),
	useFXAA_(false)
#ifndef USING_GLES2
	,
	pixelBufObj_(0),
	currentPBO_(0)
#endif
{
	CompileDraw2DProgram();

	// And an initial clear. We don't clear per frame as the games are supposed to handle that
	// by themselves.
	ClearBuffer();

	useBufferedRendering_ = g_Config.iRenderingMode != FB_NON_BUFFERED_MODE;

	// Check vendor string to try and guess GPU
	const char *cvendor = (char *)glGetString(GL_VENDOR);
	if(cvendor) {
		const std::string vendor(cvendor);

		if(vendor == "NVIDIA Corporation"
			|| vendor == "Nouveau"
			|| vendor == "nouveau") {
				gpuVendor = GPU_VENDOR_NVIDIA;
		} else if(vendor == "Advanced Micro Devices, Inc."
			|| vendor == "ATI Technologies Inc.") {
				gpuVendor = GPU_VENDOR_AMD;
		} else if(vendor == "Intel"
			|| vendor == "Intel Inc."
			|| vendor == "Intel Corporation"
			|| vendor == "Tungsten Graphics, Inc") { // We'll assume this last one means Intel
				gpuVendor = GPU_VENDOR_INTEL;
		} else if(vendor == "ARM") 
			gpuVendor = GPU_VENDOR_ARM;
		else if(vendor == "Imagination Technologies") 
			gpuVendor = GPU_VENDOR_POWERVR;
		else if(vendor == "Qualcomm") 
			gpuVendor = GPU_VENDOR_ADRENO;
		else 
			gpuVendor = GPU_VENDOR_UNKNOWN;
	} else 
		gpuVendor = GPU_VENDOR_UNKNOWN;
	gstate_c.gpuVendor = gpuVendor;
	NOTICE_LOG(SCEGE, "GPU Vendor : %s", cvendor);
}

FramebufferManager::~FramebufferManager() {
	if (drawPixelsTex_)
		glDeleteTextures(1, &drawPixelsTex_);
	if (draw2dprogram_) {
		glsl_destroy(draw2dprogram_);
	}
	SetNumExtraFBOs(0);

#ifndef USING_GLES2
	delete [] pixelBufObj_;
#endif
	delete [] convBuf;
}

void FramebufferManager::DrawPixels(const u8 *framebuf, GEBufferFormat pixelFormat, int linesize) {
	if (drawPixelsTex_ && drawPixelsTexFormat_ != pixelFormat) {
		glDeleteTextures(1, &drawPixelsTex_);
		drawPixelsTex_ = 0;
	}

	if (!drawPixelsTex_) {
		glGenTextures(1, &drawPixelsTex_);

		// Initialize backbuffer texture for DrawPixels
		glBindTexture(GL_TEXTURE_2D, drawPixelsTex_);
		glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
		glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
		glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
		glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
		glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 512, 272, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
		glBindTexture(GL_TEXTURE_2D, 0);
		drawPixelsTexFormat_ = pixelFormat;
	}

	// TODO: We can just change the texture format and flip some bits around instead of this.
	if (pixelFormat != GE_FORMAT_8888 || linesize != 512) {
		if (!convBuf) {
			convBuf = new u8[512 * 272 * 4];
		}
		for (int y = 0; y < 272; y++) {
			switch (pixelFormat) {
			case GE_FORMAT_565:
				{
					const u16 *src = (const u16 *)framebuf + linesize * y;
					u8 *dst = convBuf + 4 * 512 * y;
					for (int x = 0; x < 480; x++)
					{
						u16 col = src[x];
						dst[x * 4] = ((col) & 0x1f) << 3;
						dst[x * 4 + 1] = ((col >> 5) & 0x3f) << 2;
						dst[x * 4 + 2] = ((col >> 11) & 0x1f) << 3;
						dst[x * 4 + 3] = 255;
					}
				}
				break;

			case GE_FORMAT_5551:
				{
					const u16 *src = (const u16 *)framebuf + linesize * y;
					u8 *dst = convBuf + 4 * 512 * y;
					for (int x = 0; x < 480; x++)
					{
						u16 col = src[x];
						dst[x * 4] = ((col) & 0x1f) << 3;
						dst[x * 4 + 1] = ((col >> 5) & 0x1f) << 3;
						dst[x * 4 + 2] = ((col >> 10) & 0x1f) << 3;
						dst[x * 4 + 3] = (col >> 15) ? 255 : 0;
					}
				}
				break;

			case GE_FORMAT_4444:
				{
					const u16 *src = (const u16 *)framebuf + linesize * y;
					u8 *dst = convBuf + 4 * 512 * y;
					for (int x = 0; x < 480; x++)
					{
						u16 col = src[x];
						dst[x * 4] = ((col >> 8) & 0xf) << 4;
						dst[x * 4 + 1] = ((col >> 4) & 0xf) << 4;
						dst[x * 4 + 2] = (col & 0xf) << 4;
						dst[x * 4 + 3] = (col >> 12) << 4;
					}
				}
				break;

			case GE_FORMAT_8888:
				{
					const u8 *src = framebuf + linesize * 4 * y;
					u8 *dst = convBuf + 4 * 512 * y;
					memcpy(dst, src, 4 * 480);
				}
				break;

			case GE_FORMAT_INVALID:
				_dbg_assert_msg_(G3D, false, "Invalid pixelFormat passed to DrawPixels().");
				break;
			}
		}
	}

	float x, y, w, h;
	CenterRect(&x, &y, &w, &h, 480.0f, 272.0f, (float)PSP_CoreParameter().pixelWidth, (float)PSP_CoreParameter().pixelHeight);

	glBindTexture(GL_TEXTURE_2D,drawPixelsTex_);
	if (g_Config.iTexFiltering == LINEAR || (g_Config.iTexFiltering == LINEARFMV && g_iNumVideos))
	{
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	}
	glTexSubImage2D(GL_TEXTURE_2D,0,0,0,512,272, GL_RGBA, GL_UNSIGNED_BYTE, pixelFormat == GE_FORMAT_8888 ? framebuf : convBuf);

	DrawActiveTexture(x, y, w, h, (float)PSP_CoreParameter().pixelWidth, (float)PSP_CoreParameter().pixelHeight, false, 480.0f / 512.0f);
}

void FramebufferManager::DrawActiveTexture(float x, float y, float w, float h, float destW, float destH, bool flip, float uscale, float vscale, GLSLProgram *program) {
	float u2 = uscale;
	// Since we're flipping, 0 is down.  That's where the scale goes.
	float v1 = flip ? 1.0f : 1.0f - vscale;
	float v2 = flip ? 1.0f - vscale : 1.0f;

	const float pos[12] = {x,y,0, x+w,y,0, x+w,y+h,0, x,y+h,0};
	const float texCoords[8] = {0,v1, u2,v1, u2,v2, 0,v2};
	const GLubyte indices[4] = {0,1,3,2};
	
	if (!draw2dprogram_) {
		CompileDraw2DProgram();
	}

	if (!program) {
		program = draw2dprogram_;
	}

	glsl_bind(program);
	Matrix4x4 ortho;
	ortho.setOrtho(0, destW, destH, 0, -1, 1);
	glUniformMatrix4fv(program->u_viewproj, 1, GL_FALSE, ortho.getReadPtr());
	glBindBuffer(GL_ARRAY_BUFFER, 0);
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
	glEnableVertexAttribArray(program->a_position);
	glEnableVertexAttribArray(program->a_texcoord0);
	glVertexAttribPointer(program->a_position, 3, GL_FLOAT, GL_FALSE, 12, pos);
	glVertexAttribPointer(program->a_texcoord0, 2, GL_FLOAT, GL_FALSE, 8, texCoords);
	//glDrawArrays(GL_TRIANGLE_FAN, 0, 4); // glDrawElements tested slightly faster on OpenGL atleast
	glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_BYTE, indices);
	glDisableVertexAttribArray(program->a_position);
	glDisableVertexAttribArray(program->a_texcoord0);
	glsl_unbind();
}

VirtualFramebuffer *FramebufferManager::GetVFBAt(u32 addr) {
	VirtualFramebuffer *match = NULL;
	for (size_t i = 0; i < vfbs_.size(); ++i) {
		VirtualFramebuffer *v = vfbs_[i];
		if (MaskedEqual(v->fb_address, addr) && v->format == displayFormat_ && v->width >= 480) {
			// Could check w too but whatever
			if (match == NULL || match->last_frame_render < v->last_frame_render) {
				match = v;
			}
		}
	}
	if (match != NULL) {
		return match;
	}

	DEBUG_LOG(SCEGE, "Finding no FBO matching address %08x", addr);
#if 0  // defined(_DEBUG)
	std::string debug = "FBOs: ";
	for (size_t i = 0; i < vfbs_.size(); ++i) {
		char temp[256];
		sprintf(temp, "%08x %i %i", vfbs_[i]->fb_address, vfbs_[i]->width, vfbs_[i]->height);
		debug += std::string(temp);
	}
	ERROR_LOG(SCEGE, "FBOs: %s", debug.c_str());
#endif
	return 0;
}

// Heuristics to figure out the size of FBO to create.
static void DrawingSize(int &drawing_width, int &drawing_height) {
	int default_width = 480; 
	int default_height = 272;
	int viewport_width = (int) gstate.getViewportX1(); 
	int viewport_height = (int) gstate.getViewportY1(); 
	int region_width = gstate.getRegionX2() + 1;
	int region_height = gstate.getRegionY2() + 1;
	int scissor_width = gstate.getScissorX2() + 1;
	int scissor_height = gstate.getScissorY2() + 1;
	int fb_stride = gstate.fbwidth & 0x3C0;

	DEBUG_LOG(SCEGE,"viewport : %ix%i, region : %ix%i , scissor: %ix%i, stride: %i, %i", viewport_width,viewport_height, region_width, region_height, scissor_width, scissor_height, fb_stride, gstate.isModeThrough());

	// Viewport may return 0x0 for example FF Type-0 and we set it to 480x272
	if (viewport_width <= 1 && viewport_height <=1) {
		viewport_width = default_width;
		viewport_height = default_height;
	} 

	if (fb_stride > 0 && fb_stride < 512) {
		// Correct scissor size has to be used to render like character shadow in Mortal Kombat .
		if (fb_stride == scissor_width && region_width != scissor_width) { 
			drawing_width = scissor_width;
			drawing_height = scissor_height;
		} else {
			drawing_width = viewport_width;
			drawing_height = viewport_height;
		}
	} else {
		// Correct region size has to be used when fb_width equals to region_width for exmaple GTA/Midnight Club/MSG Peace Maker .
		if (fb_stride == region_width && region_width == viewport_width) { 
			drawing_width = region_width;
			drawing_height = region_height;
		} else if (fb_stride == viewport_width) { 
			drawing_width = viewport_width;
			drawing_height = viewport_height;
		} else {
			drawing_width = default_width;
			drawing_height = default_height;
		}
	}
}

void FramebufferManager::DestroyFramebuf(VirtualFramebuffer *v) {
	textureCache_->NotifyFramebuffer(v->fb_address, v, NOTIFY_FB_DESTROYED);
	if (v->fbo) {
		fbo_destroy(v->fbo);
		v->fbo = 0;
	}

	// Wipe some pointers
	if (currentRenderVfb_ == v)
		currentRenderVfb_ = 0;
	if (displayFramebuf_ == v)
		displayFramebuf_ = 0;
	if (prevDisplayFramebuf_ == v)
		prevDisplayFramebuf_ = 0;
	if (prevPrevDisplayFramebuf_ == v)
		prevPrevDisplayFramebuf_ = 0;

	delete v;
}

void FramebufferManager::SetRenderFrameBuffer() {
	if (!gstate_c.framebufChanged && currentRenderVfb_) {
		currentRenderVfb_->last_frame_render = gpuStats.numFlips;
		currentRenderVfb_->dirtyAfterDisplay = true;
		if (!gstate_c.skipDrawReason)
			currentRenderVfb_->reallyDirtyAfterDisplay = true;
		return;
	}
	gstate_c.framebufChanged = false;

	// Get parameters
	u32 fb_address = gstate.getFrameBufRawAddress();
	int fb_stride = gstate.fbwidth & 0x3C0;

	u32 z_address = gstate.getDepthBufRawAddress();
	int z_stride = gstate.zbwidth & 0x3C0;

	// Yeah this is not completely right. but it'll do for now.
	//int drawing_width = ((gstate.region2) & 0x3FF) + 1;
	//int drawing_height = ((gstate.region2 >> 10) & 0x3FF) + 1;
		
	// As there are no clear "framebuffer width" and "framebuffer height" registers,
	// we need to infer the size of the current framebuffer somehow. Let's try the viewport.
	
	GEBufferFormat fmt = gstate.FrameBufFormat();

	int drawing_width, drawing_height;
	DrawingSize(drawing_width, drawing_height);

	int buffer_width = drawing_width;
	int buffer_height = drawing_height;

	// Find a matching framebuffer, same size or bigger
	VirtualFramebuffer *vfb = 0;
	for (size_t i = 0; i < vfbs_.size(); ++i) {
		VirtualFramebuffer *v = vfbs_[i];
		if (MaskedEqual(v->fb_address, fb_address)) {
			// Okay, let's check the sizes. If the new one is bigger than the old one, recreate.
			// If the opposite, just use it and hope that the game sets scissors accordingly.
			if (v->bufferWidth >= drawing_width && v->bufferHeight >= drawing_height) {
				// Let's not be so picky for now. Let's say this is the one.
				vfb = v;
				// Update fb stride in case it changed
				vfb->fb_stride = fb_stride;
				v->format = fmt;
				// Just hack the width/height and we should be fine. also hack renderwidth/renderheight?
				v->width = drawing_width;
				v->height = drawing_height;
				break;
			} else {
				INFO_LOG(HLE, "Enlarging framebuffer from (%i, %i) to (%i, %i)", (int)v->width, (int)v->height, drawing_width, drawing_height);
				// drawing_width or drawing_height is bigger. Let's recreate with the max.
				// To do this right we should copy the data over too, but meh.
				if ((int)v->width >= drawing_width && (int)v->height >= drawing_height) {
					buffer_width = (int)v->width;
					buffer_height = (int)v->height;
				} else {
					buffer_width = drawing_width;
					buffer_height = drawing_height;
				}

				DestroyFramebuf(v);
				vfbs_.erase(vfbs_.begin() + i--);
				break;
			}
		}
	}

	float renderWidthFactor = (float)PSP_CoreParameter().renderWidth / 480.0f;
	float renderHeightFactor = (float)PSP_CoreParameter().renderHeight / 272.0f;

	// None found? Create one.
	if (!vfb) {
		gstate_c.textureChanged = true;
		vfb = new VirtualFramebuffer();
		vfb->fbo = 0;
		vfb->fb_address = fb_address;
		vfb->fb_stride = fb_stride;
		vfb->z_address = z_address;
		vfb->z_stride = z_stride;
		vfb->width = drawing_width;
		vfb->height = drawing_height;
		vfb->renderWidth = (u16)(drawing_width * renderWidthFactor);
		vfb->renderHeight = (u16)(drawing_height * renderHeightFactor);
		vfb->bufferWidth = buffer_width;
		vfb->bufferHeight = buffer_height;
		vfb->format = fmt;
		vfb->usageFlags = FB_USAGE_RENDERTARGET;
		vfb->dirtyAfterDisplay = true;
		if ((gstate_c.skipDrawReason & SKIPDRAW_SKIPFRAME) == 0)
			vfb->reallyDirtyAfterDisplay = true;
		vfb->memoryUpdated = false; 

		if (g_Config.bTrueColor) {
			vfb->colorDepth = FBO_8888;
		} else { 
			switch (fmt) {
				case GE_FORMAT_4444:
					vfb->colorDepth = FBO_4444;
					break;
				case GE_FORMAT_5551:
					vfb->colorDepth = FBO_5551;
					break;
				case GE_FORMAT_565:
					vfb->colorDepth = FBO_565;
					break;
				case GE_FORMAT_8888:
					vfb->colorDepth = FBO_8888;
					break;
				default:
					vfb->colorDepth = FBO_8888;
					break;
			}
		}
			
		if (useBufferedRendering_) {
			vfb->fbo = fbo_create(vfb->renderWidth, vfb->renderHeight, 1, true, vfb->colorDepth);
			if (vfb->fbo) {
				fbo_bind_as_render_target(vfb->fbo);
			} else {
				ERROR_LOG(SCEGE, "Error creating FBO! %i x %i", vfb->renderWidth, vfb->renderHeight);
			}
		} else {
			fbo_unbind();
			// Let's ignore rendering to targets that have not (yet) been displayed.
			gstate_c.skipDrawReason |= SKIPDRAW_NON_DISPLAYED_FB;
		}

		textureCache_->NotifyFramebuffer(vfb->fb_address, vfb, NOTIFY_FB_CREATED);

		vfb->last_frame_render = gpuStats.numFlips;
		frameLastFramebufUsed = gpuStats.numFlips;
		vfbs_.push_back(vfb);
		ClearBuffer();
		glEnable(GL_DITHER);
		currentRenderVfb_ = vfb;

		INFO_LOG(SCEGE, "Creating FBO for %08x : %i x %i x %i", vfb->fb_address, vfb->width, vfb->height, vfb->format);

		// Let's check for depth buffer overlap.  Might be interesting.
		bool sharingReported = false;
		for (size_t i = 0, end = vfbs_.size(); i < end; ++i) {
			if (MaskedEqual(fb_address, vfbs_[i]->z_address)) {
				WARN_LOG_REPORT(SCEGE, "FBO created from existing depthbuffer (unsupported), %08x/%08x and %08x/%08x", fb_address, z_address, vfbs_[i]->fb_address, vfbs_[i]->z_address);
			} else if (MaskedEqual(z_address, vfbs_[i]->fb_address)) {
				WARN_LOG_REPORT(SCEGE, "FBO using other buffer as depthbuffer (unsupported), %08x/%08x and %08x/%08x", fb_address, z_address, vfbs_[i]->fb_address, vfbs_[i]->z_address);
			} else if (MaskedEqual(z_address, vfbs_[i]->z_address) && fb_address != vfbs_[i]->fb_address && !sharingReported) {
				WARN_LOG_REPORT(SCEGE, "FBO sharing existing depthbuffer (unsupported), %08x/%08x and %08x/%08x", fb_address, z_address, vfbs_[i]->fb_address, vfbs_[i]->z_address);
				sharingReported = true;
			}
		}

	// We already have it!
	} else if (vfb != currentRenderVfb_) {
		bool updateVRAM = !(g_Config.iRenderingMode == FB_NON_BUFFERED_MODE || g_Config.iRenderingMode == FB_BUFFERED_MODE);

		if (updateVRAM && !vfb->memoryUpdated) {
			ReadFramebufferToMemory(vfb, true);
		} 
		// Use it as a render target.
		DEBUG_LOG(SCEGE, "Switching render target to FBO for %08x: %i x %i x %i ", vfb->fb_address, vfb->width, vfb->height, vfb->format);
		vfb->usageFlags |= FB_USAGE_RENDERTARGET;
		gstate_c.textureChanged = true;
		vfb->last_frame_render = gpuStats.numFlips;
		frameLastFramebufUsed = gpuStats.numFlips;
		vfb->dirtyAfterDisplay = true;
		if ((gstate_c.skipDrawReason & SKIPDRAW_SKIPFRAME) == 0)
			vfb->reallyDirtyAfterDisplay = true;
		vfb->memoryUpdated = false;

		if (useBufferedRendering_) {
			if (vfb->fbo) {
				fbo_bind_as_render_target(vfb->fbo);
			} else {
				// wtf? This should only happen very briefly when toggling bBufferedRendering
				fbo_unbind();
			}
		} else {
			if (vfb->fbo) {
				// wtf? This should only happen very briefly when toggling bBufferedRendering
				textureCache_->NotifyFramebuffer(vfb->fb_address, vfb, NOTIFY_FB_DESTROYED);
				fbo_destroy(vfb->fbo);
				vfb->fbo = 0;
			}
			fbo_unbind();

			// Let's ignore rendering to targets that have not (yet) been displayed.
			if (vfb->usageFlags & FB_USAGE_DISPLAYED_FRAMEBUFFER)
				gstate_c.skipDrawReason &= ~SKIPDRAW_NON_DISPLAYED_FB;
			else
				gstate_c.skipDrawReason |= SKIPDRAW_NON_DISPLAYED_FB;

			/*
			if (drawing_width == 480 && drawing_height == 272) {
				gstate_c.skipDrawReason &= ~SKIPDRAW_SKIPNONFB;
				// OK!
			} else {
				gstate_c.skipDrawReason |= ~SKIPDRAW_SKIPNONFB;
			}*/
		}
		textureCache_->NotifyFramebuffer(vfb->fb_address, vfb, NOTIFY_FB_UPDATED);

#ifdef USING_GLES2
		// Some tiled mobile GPUs benefit IMMENSELY from clearing an FBO before rendering
		// to it. This broke stuff before, so now it only clears on the first use of an
		// FBO in a frame. This means that some games won't be able to avoid the on-some-GPUs
		// performance-crushing framebuffer reloads from RAM, but we'll have to live with that.
		if (vfb->last_frame_render != gpuStats.numFlips)	{
			ClearBuffer();
		}
#endif
		currentRenderVfb_ = vfb;
	} else {
		vfb->last_frame_render = gpuStats.numFlips;
		frameLastFramebufUsed = gpuStats.numFlips;
		vfb->dirtyAfterDisplay = true;
		if ((gstate_c.skipDrawReason & SKIPDRAW_SKIPFRAME) == 0)
			vfb->reallyDirtyAfterDisplay = true;
	}

	// ugly...
	if (gstate_c.curRTWidth != vfb->width || gstate_c.curRTHeight != vfb->height) {
		shaderManager_->DirtyUniform(DIRTY_PROJTHROUGHMATRIX);
		gstate_c.curRTWidth = vfb->width;
		gstate_c.curRTHeight = vfb->height;
	}
}

void FramebufferManager::CopyDisplayToOutput() {
	fbo_unbind();
	currentRenderVfb_ = 0;

	VirtualFramebuffer *vfb = GetVFBAt(displayFramebufPtr_);
	if (!vfb) {
		if (Memory::IsValidAddress(displayFramebufPtr_)) {
			// The game is displaying something directly from RAM. In GTA, it's decoded video.

			// First check that it's not a known RAM copy of a VRAM framebuffer though, as in MotoGP
			for (auto iter = knownFramebufferCopies_.begin(); iter != knownFramebufferCopies_.end(); ++iter) {
				if (iter->second == displayFramebufPtr_) {
					vfb = GetVFBAt(iter->first);
				}
			}

			if (!vfb) {
				// Just a pointer to plain memory to draw. Draw it.
				DrawPixels(Memory::GetPointer(displayFramebufPtr_), displayFormat_, displayStride_);
				return;
			}
		} else {
			DEBUG_LOG(SCEGE, "Found no FBO to display! displayFBPtr = %08x", displayFramebufPtr_);
			// No framebuffer to display! Clear to black.
			ClearBuffer();
			return;
		}
	}

	vfb->usageFlags |= FB_USAGE_DISPLAYED_FRAMEBUFFER;
	vfb->dirtyAfterDisplay = false;
	vfb->reallyDirtyAfterDisplay = false;

	if (prevDisplayFramebuf_ != displayFramebuf_) {
		prevPrevDisplayFramebuf_ = prevDisplayFramebuf_;
	}
	if (displayFramebuf_ != vfb) {
		prevDisplayFramebuf_ = displayFramebuf_;
	}
	displayFramebuf_ = vfb;

	if (resized_) {
		ClearBuffer();
		DestroyDraw2DProgram();
	}

	if (vfb->fbo) {
		DEBUG_LOG(SCEGE, "Displaying FBO %08x", vfb->fb_address);
		DisableState();

		GLuint colorTexture = fbo_get_color_texture(vfb->fbo);

		if (useFXAA_ && extraFBOs_.size() == 1) {
			glBindTexture(GL_TEXTURE_2D, colorTexture);

			// An additional pass, FXAA to the extra FBO.
			fbo_bind_as_render_target(extraFBOs_[0]);
			int fbo_w, fbo_h;
			fbo_get_dimensions(extraFBOs_[0], &fbo_w, &fbo_h);
			glstate.viewport.set(0, 0, fbo_w, fbo_h);
			DrawActiveTexture(0, 0, fbo_w, fbo_h, fbo_w, fbo_h, true, 1.0f, 1.0f, fxaaProgram_);

			fbo_unbind();

			// Use the extra FBO, with applied FXAA, as a texture.
			// fbo_bind_color_as_texture(extraFBOs_[0], 0);
			colorTexture = fbo_get_color_texture(extraFBOs_[0]);
		}

		glstate.viewport.set(0, 0, PSP_CoreParameter().pixelWidth, PSP_CoreParameter().pixelHeight);
		// These are in the output display coordinates
		float x, y, w, h;
		CenterRect(&x, &y, &w, &h, 480.0f, 272.0f, (float)PSP_CoreParameter().pixelWidth, (float)PSP_CoreParameter().pixelHeight);
		
#if defined(USING_GLES2) && !defined(__SYMBIAN32__) && !defined(MEEGO_EDITION_HARMATTAN) && !defined(IOS)
		if (gl_extensions.NV_draw_texture) {
			// Fast path for Tegra. TODO: Make this path work on desktop nvidia, seems glew doesn't have a clue.
			glDrawTextureNV(colorTexture, 0, 
				x, y, w, h, 0.0f, 
				0, 0, 480.0f / (float)vfb->width, 272.0f / (float)vfb->height);
			return;
		}
#endif

		glBindTexture(GL_TEXTURE_2D, colorTexture);
		DrawActiveTexture(x, y, w, h, (float)PSP_CoreParameter().pixelWidth, (float)PSP_CoreParameter().pixelHeight, true, 480.0f / (float)vfb->width, 272.0f / (float)vfb->height);
		glBindTexture(GL_TEXTURE_2D, 0);
	}
}

void FramebufferManager::ReadFramebufferToMemory(VirtualFramebuffer *vfb, bool sync) {
#ifndef USING_GLES2
	if(sync) {
		PackFramebufferAsync_(NULL); // flush async just in case when we go for synchronous update
	}
#endif 

	if(vfb) {
		// We'll pseudo-blit framebuffers here to get a resized and flipped version of vfb.
		// For now we'll keep these on the same struct as the ones that can get displayed
		// (and blatantly copy work already done above while at it).
		VirtualFramebuffer *nvfb = 0;

		// We maintain a separate vector of framebuffer objects for blitting.
		for (size_t i = 0; i < bvfbs_.size(); ++i) {
			VirtualFramebuffer *v = bvfbs_[i];
			if (MaskedEqual(v->fb_address, vfb->fb_address) && v->format == vfb->format) {
				if (v->bufferWidth == vfb->bufferWidth && v->bufferHeight == vfb->bufferHeight) {
					nvfb = v;
					v->fb_stride = vfb->fb_stride;
					v->width = vfb->width;
					v->height = vfb->height;
					break;
				}
			}
		}

		// Create a new fbo if none was found for the size
		if(!nvfb) {
			nvfb = new VirtualFramebuffer();
			nvfb->fbo = 0;
			nvfb->fb_address = vfb->fb_address;
			nvfb->fb_stride = vfb->fb_stride;
			nvfb->z_address = vfb->z_address;
			nvfb->z_stride = vfb->z_stride;
			nvfb->width = vfb->width;
			nvfb->height = vfb->height;
			nvfb->renderWidth = vfb->width;
			nvfb->renderHeight = vfb->height;
			nvfb->bufferWidth = vfb->bufferWidth;
			nvfb->bufferHeight = vfb->bufferHeight;
			nvfb->format = vfb->format;
			nvfb->usageFlags = FB_USAGE_RENDERTARGET;
			nvfb->dirtyAfterDisplay = true;

			// When updating VRAM, it need to be exact format.
			switch (vfb->format) {
				case GE_FORMAT_4444:
					nvfb->colorDepth = FBO_4444;
					break;
				case GE_FORMAT_5551:
					nvfb->colorDepth = FBO_5551;
					break;
				case GE_FORMAT_565: 
					nvfb->colorDepth = FBO_565;
					break;
				case GE_FORMAT_8888:
				default:
					nvfb->colorDepth = FBO_8888;
					break;
			}

			nvfb->fbo = fbo_create(nvfb->width, nvfb->height, 1, true, nvfb->colorDepth);
			if (!(nvfb->fbo)) {
				ERROR_LOG(SCEGE, "Error creating FBO! %i x %i", nvfb->renderWidth, nvfb->renderHeight);
				return;
			}

			nvfb->last_frame_render = gpuStats.numFlips;
			bvfbs_.push_back(nvfb);
			fbo_bind_as_render_target(nvfb->fbo); 
			ClearBuffer();
			glEnable(GL_DITHER);
		} else {
			nvfb->usageFlags |= FB_USAGE_RENDERTARGET;
			gstate_c.textureChanged = true;
			nvfb->last_frame_render = gpuStats.numFlips;
			nvfb->dirtyAfterDisplay = true;

#ifdef USING_GLES2
			if (nvfb->fbo) {
				fbo_bind_as_render_target(nvfb->fbo);
			}

			// Some tiled mobile GPUs benefit IMMENSELY from clearing an FBO before rendering
			// to it. This broke stuff before, so now it only clears on the first use of an
			// FBO in a frame. This means that some games won't be able to avoid the on-some-GPUs
			// performance-crushing framebuffer reloads from RAM, but we'll have to live with that.
			if (nvfb->last_frame_render != gpuStats.numFlips)	{
				ClearBuffer();
			}
#endif
		}

		vfb->memoryUpdated = true;
		BlitFramebuffer_(vfb, nvfb, false);

#ifdef USING_GLES2
		PackFramebufferSync_(nvfb); // synchronous glReadPixels
#else
		if(gl_extensions.PBO_ARB || !gl_extensions.ATIClampBug) {
			if(!sync) {
				PackFramebufferAsync_(nvfb); // asynchronous glReadPixels using PBOs
			} else {
				PackFramebufferSync_(nvfb); // synchronous glReadPixels
			}
		}
#endif
	}
}

void FramebufferManager::BlitFramebuffer_(VirtualFramebuffer *src, VirtualFramebuffer *dst, bool flip, float upscale, float vscale) {

	if (dst->fbo) {
		fbo_bind_as_render_target(dst->fbo);
	} else {
		ERROR_LOG_REPORT_ONCE(dstfbozero, SCEGE, "BlitFramebuffer_: dst->fbo == 0");
		fbo_unbind();
		return;
	}
	
	if(glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
		ERROR_LOG(SCEGE, "Incomplete target framebuffer, aborting blit");
		fbo_unbind();
		return;
	}
	
	glstate.viewport.set(0, 0, dst->width, dst->height);
	DisableState();

	if (src->fbo) {
		fbo_bind_color_as_texture(src->fbo, 0);
	} else {
		ERROR_LOG_REPORT_ONCE(srcfbozero, SCEGE, "BlitFramebuffer_: src->fbo == 0");
		fbo_unbind();
		return;
	}

	float x, y, w, h;
	CenterRect(&x, &y, &w, &h, 480.0f, 272.0f, (float)PSP_CoreParameter().pixelWidth, (float)PSP_CoreParameter().pixelHeight);

	CompileDraw2DProgram();

	DrawActiveTexture(x, y, w, h, (float)PSP_CoreParameter().pixelWidth, (float)PSP_CoreParameter().pixelHeight, flip, upscale, vscale, draw2dprogram_);
	
	glBindTexture(GL_TEXTURE_2D, 0);
	fbo_unbind();
}

// TODO: SSE/NEON
void ConvertFromRGBA8888(u8 *dst, u8 *src, u32 stride, u32 height, GEBufferFormat format) {
	if(format == GE_FORMAT_8888) {
		if(src == dst) {
			return;
		} else { // Here lets assume they don't intersect
			memcpy(dst, src, stride * height * 4);
		}
	} else { // But here it shouldn't matter if they do
		int size = height * stride;
		const u32 *src32 = (const u32 *)src;
		u16 *dst16 = (u16 *)dst;
		switch (format) {
			case GE_FORMAT_565: // BGR 565
				for(int i = 0; i < size; i++) {
					dst16[i] = RGBA8888toRGB565(src32[i]);
				}
				break;
			case GE_FORMAT_5551: // ABGR 1555
				for(int i = 0; i < size; i++) {
					dst16[i] = RGBA8888toRGBA5551(src32[i]);
				}

				break;
			case GE_FORMAT_4444: // ABGR 4444
				for(int i = 0; i < size; i++) {
					dst16[i] = RGBA8888toRGBA4444(src32[i]);
				}
				break;
			case GE_FORMAT_8888:
				// Not possible.
				break;
			default:
				break;
		}
	}
}

#ifndef USING_GLES2

void FramebufferManager::PackFramebufferAsync_(VirtualFramebuffer *vfb) {
	const int MAX_PBO = 2;
	GLubyte *packed = 0;
	bool unbind = false;
	u8 nextPBO = (currentPBO_ + 1) % MAX_PBO;
	bool useCPU = g_Config.iRenderingMode == FB_READFBOMEMORY_CPU;

	// We'll prepare two PBOs to switch between readying and reading
	if(!pixelBufObj_) {
		GLuint pbos[MAX_PBO];

		glGenBuffers(MAX_PBO, pbos);

		pixelBufObj_ = new AsyncPBO[MAX_PBO];

		for(int i = 0; i < MAX_PBO; i++) {
			pixelBufObj_[i].handle = pbos[i];
			pixelBufObj_[i].maxSize = 0;
			pixelBufObj_[i].reading = false;
		}
	}


	// Receive previously requested data from a PBO
	if(pixelBufObj_[nextPBO].reading) {
		glBindBuffer(GL_PIXEL_PACK_BUFFER, pixelBufObj_[nextPBO].handle);
		packed = (GLubyte *)glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);

		if(packed) {
			DEBUG_LOG(SCEGE, "Reading PBO to memory , bufSize = %u, packed = %08x, fb_address = %08x, stride = %u, pbo = %u", 
			pixelBufObj_[nextPBO].size, packed, pixelBufObj_[nextPBO].fb_address, pixelBufObj_[nextPBO].stride, nextPBO);

			if(useCPU) {
				ConvertFromRGBA8888(Memory::GetPointer(pixelBufObj_[nextPBO].fb_address), packed, 
								pixelBufObj_[nextPBO].stride, pixelBufObj_[nextPBO].height, 
								pixelBufObj_[nextPBO].format);
			} else { 
				// We don't need to convert, GPU already did (or should have)
				Memory::Memcpy(pixelBufObj_[nextPBO].fb_address, packed, pixelBufObj_[nextPBO].size);
			}

			pixelBufObj_[nextPBO].reading = false;
		}

		glUnmapBuffer(GL_PIXEL_PACK_BUFFER);

		unbind = true;
	}

	// Order packing/readback of the framebuffer
	if(vfb) {
		int pixelType, pixelSize, pixelFormat, align;

		bool reverseOrder = (gpuVendor == GPU_VENDOR_NVIDIA) || (gpuVendor == GPU_VENDOR_AMD);
		switch (vfb->format) {
			// GL_UNSIGNED_INT_8_8_8_8 returns A B G R (little-endian, tested in Nvidia card/x86 PC)
			// GL_UNSIGNED_BYTE returns R G B A in consecutive bytes ("big-endian"/not treated as 32-bit value)
			// We want R G B A, so we use *_REV for 16-bit formats and GL_UNSIGNED_BYTE for 32-bit
			case GE_FORMAT_4444: // 16 bit RGBA
				pixelType = (reverseOrder ? GL_UNSIGNED_SHORT_4_4_4_4_REV : GL_UNSIGNED_SHORT_4_4_4_4);
				pixelFormat = GL_RGBA;
				pixelSize = 2;
				align = 8;
				break;
			case GE_FORMAT_5551: // 16 bit RGBA
				pixelType = (reverseOrder ? GL_UNSIGNED_SHORT_1_5_5_5_REV : GL_UNSIGNED_SHORT_5_5_5_1);
				pixelFormat = GL_RGBA;
				pixelSize = 2;
				align = 8;
				break;
			case GE_FORMAT_565: // 16 bit RGB
				pixelType = (reverseOrder ? GL_UNSIGNED_SHORT_5_6_5_REV : GL_UNSIGNED_SHORT_5_6_5);
				pixelFormat = GL_RGB;
				pixelSize = 2;
				align = 8;
				break;
			case GE_FORMAT_8888: // 32 bit RGBA
			default:
				pixelType = GL_UNSIGNED_BYTE;
				pixelFormat = GL_RGBA;
				pixelSize = 4;
				align = 4;
				break;
		}

		u32 bufSize = vfb->fb_stride * vfb->height * pixelSize;
		u32 fb_address = (0x04000000) | vfb->fb_address;

		if (vfb->fbo) {
			fbo_bind_for_read(vfb->fbo);
		} else {
			fbo_unbind();
			if(gl_extensions.FBO_ARB) {
				glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
			}
			return;
		}

		if(glCheckFramebufferStatus(GL_READ_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
			ERROR_LOG(SCEGE, "Incomplete source framebuffer, aborting read");
			fbo_unbind();
			if(gl_extensions.FBO_ARB) {
				glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
			}
			return;
		}

		glBindBuffer(GL_PIXEL_PACK_BUFFER, pixelBufObj_[currentPBO_].handle);

		if(pixelBufObj_[currentPBO_].maxSize < bufSize) {
			// We reserve a buffer big enough to fit all those pixels
			if(useCPU && pixelType != GL_UNSIGNED_BYTE) {
				// Wnd result may be 16-bit but we are reading 32-bit, so we need double the space on the buffer
				glBufferData(GL_PIXEL_PACK_BUFFER, bufSize*2, NULL, GL_DYNAMIC_READ);
			} else {
				glBufferData(GL_PIXEL_PACK_BUFFER, bufSize, NULL, GL_DYNAMIC_READ);
			}
			pixelBufObj_[currentPBO_].maxSize = bufSize;
		}

		if(useCPU) {
			// If converting pixel formats on the CPU we'll always request RGBA8888
			glPixelStorei(GL_PACK_ALIGNMENT, 4);
			glReadPixels(0, 0, vfb->fb_stride, vfb->height, GL_RGBA, GL_UNSIGNED_BYTE, 0);
		} else {
			// Otherwise we'll directly request the format we need and let the GPU sort it out
			glPixelStorei(GL_PACK_ALIGNMENT, align);
			glReadPixels(0, 0, vfb->fb_stride, vfb->height, pixelFormat, pixelType, 0);
		}

		GLenum error = glGetError();
		switch(error) {
			case 0:
				break;
			case GL_INVALID_ENUM: 
				ERROR_LOG(SCEGE, "glReadPixels: GL_INVALID_ENUM"); 
				break;
			case GL_INVALID_VALUE: 
				ERROR_LOG(SCEGE, "glReadPixels: GL_INVALID_VALUE"); 
				break;
			case GL_INVALID_OPERATION: 
				// GL_INVALID_OPERATION will happen sometimes midframe but everything 
				// seems to work out when actually mapping buffers? 
				// GL_SAMPLE_BUFFERS, GL_READ_BUFFER, GL_BUFFER_SIZE/MAPPED, 
				// GL_PIXEL_PACK_BUFFER_BINDING, all have the expected values.
				ERROR_LOG(SCEGE, "glReadPixels: GL_INVALID_OPERATION"); 
				break;
			case GL_INVALID_FRAMEBUFFER_OPERATION: 
				ERROR_LOG(SCEGE, "glReadPixels: GL_INVALID_FRAMEBUFFER_OPERATION"); 
				break;
			default:
				ERROR_LOG(SCEGE, "glReadPixels: UNKNOWN OPENGL ERROR %u", error);
				break;
		}

		fbo_unbind();
		if(gl_extensions.FBO_ARB) {
			glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
		}

		unbind = true;

		pixelBufObj_[currentPBO_].fb_address = fb_address;
		pixelBufObj_[currentPBO_].size = bufSize;
		pixelBufObj_[currentPBO_].stride = vfb->fb_stride;
		pixelBufObj_[currentPBO_].height = vfb->height;
		pixelBufObj_[currentPBO_].format = vfb->format;
		pixelBufObj_[currentPBO_].reading = true;
	}

	currentPBO_ = nextPBO;

	if(unbind) {
		glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
	}
}

#endif

void FramebufferManager::PackFramebufferSync_(VirtualFramebuffer *vfb) {
	if (vfb->fbo) {
		fbo_bind_for_read(vfb->fbo);
	} else {
		ERROR_LOG_REPORT_ONCE(vfbfbozero, SCEGE, "PackFramebufferSync_: vfb->fbo == 0");
		fbo_unbind();
		return;
	}

	// Pixel size always 4 here because we always request RGBA8888
	size_t bufSize = vfb->fb_stride * vfb->height * 4;
	u32 fb_address = (0x04000000) | vfb->fb_address;

	GLubyte *packed = 0;
	if(vfb->format == GE_FORMAT_8888) {
		packed = (GLubyte *)Memory::GetPointer(fb_address);
	} else { // End result may be 16-bit but we are reading 32-bit, so there may not be enough space at fb_address
		packed = (GLubyte *)malloc(bufSize * sizeof(GLubyte));
	}

	if(packed) {
		DEBUG_LOG(SCEGE, "Reading framebuffer to mem, bufSize = %u, packed = %p, fb_address = %08x", 
			(u32)bufSize, packed, fb_address);

		glPixelStorei(GL_PACK_ALIGNMENT, 4);
		glReadPixels(0, 0, vfb->fb_stride, vfb->height, GL_RGBA, GL_UNSIGNED_BYTE, packed);
		GLenum error = glGetError();
		switch(error) {
			case 0:
				break;
			case GL_INVALID_ENUM: 
				ERROR_LOG(SCEGE, "glReadPixels: GL_INVALID_ENUM"); 
				break;
			case GL_INVALID_VALUE: 
				ERROR_LOG(SCEGE, "glReadPixels: GL_INVALID_VALUE"); 
				break;
			case GL_INVALID_OPERATION:
				// GL_INVALID_OPERATION will happen sometimes midframe but everything 
				// seems to work out when actually reading? 
				ERROR_LOG(SCEGE, "glReadPixels: GL_INVALID_OPERATION"); 
				break;
			case GL_INVALID_FRAMEBUFFER_OPERATION: 
				ERROR_LOG(SCEGE, "glReadPixels: GL_INVALID_FRAMEBUFFER_OPERATION"); 
				break;
			default:
				ERROR_LOG(SCEGE, "glReadPixels: UNKNOWN OPENGL ERROR %u", error);
				break;
		}

		if(vfb->format != GE_FORMAT_8888) { // If not RGBA 8888 we need to convert
			ConvertFromRGBA8888(Memory::GetPointer(fb_address), packed, vfb->fb_stride, vfb->height, vfb->format);
			free(packed);
		}
	}

	fbo_unbind();
}

void FramebufferManager::EndFrame() {
	if (resized_) {
		DestroyAllFBOs();
		glstate.viewport.set(0, 0, PSP_CoreParameter().pixelWidth, PSP_CoreParameter().pixelHeight);
		resized_ = false;
	}

#ifndef USING_GLES2
	// We flush to memory last requested framebuffer, if any
	PackFramebufferAsync_(NULL);
#endif
}

void FramebufferManager::DeviceLost() {
	DestroyAllFBOs();
	DestroyDraw2DProgram();
	resized_ = false;
}

void FramebufferManager::BeginFrame() {
	DecimateFBOs();
	currentRenderVfb_ = 0;
	useBufferedRendering_ = g_Config.iRenderingMode != FB_NON_BUFFERED_MODE;
}

void FramebufferManager::SetDisplayFramebuffer(u32 framebuf, u32 stride, GEBufferFormat format) {
	displayFramebufPtr_ = framebuf;
	displayStride_ = stride;
	displayFormat_ = format;
}

std::vector<FramebufferInfo> FramebufferManager::GetFramebufferList() {
	std::vector<FramebufferInfo> list;

	for (size_t i = 0; i < vfbs_.size(); ++i) {
		VirtualFramebuffer *vfb = vfbs_[i];

		FramebufferInfo info;
		info.fb_address = vfb->fb_address;
		info.z_address = vfb->z_address;
		info.format = vfb->format;
		info.width = vfb->width;
		info.height = vfb->height;
		info.fbo = vfb->fbo;
		list.push_back(info);
	}

	return list;
}

// MotoGP workaround
void FramebufferManager::NotifyFramebufferCopy(u32 src, u32 dest, int size) {
	for (size_t i = 0; i < vfbs_.size(); i++) {
		// This size fits for MotoGP. Might want to make this more flexible for other games if they do the same.
		if ((vfbs_[i]->fb_address | 0x04000000) == src && size == 512 * 272 * 2) {
			// A framebuffer matched!
			knownFramebufferCopies_.insert(std::pair<u32, u32>(src, dest));
		}
	}
}

void FramebufferManager::DecimateFBOs() {
	fbo_unbind();
	currentRenderVfb_ = 0;
	bool updateVram = !(g_Config.iRenderingMode == FB_NON_BUFFERED_MODE || g_Config.iRenderingMode == FB_BUFFERED_MODE);

	for (size_t i = 0; i < vfbs_.size(); ++i) {
		VirtualFramebuffer *vfb = vfbs_[i];
		int age = frameLastFramebufUsed - std::max(vfb->last_frame_render, vfb->last_frame_used);

		if(updateVram && age == 0 && !vfb->memoryUpdated && vfb == displayFramebuf_) 
				ReadFramebufferToMemory(vfb);

		if (vfb == displayFramebuf_ || vfb == prevDisplayFramebuf_ || vfb == prevPrevDisplayFramebuf_) {
			continue;
		}

		if (age > FBO_OLD_AGE) {
			INFO_LOG(SCEGE, "Decimating FBO for %08x (%i x %i x %i), age %i", vfb->fb_address, vfb->width, vfb->height, vfb->format, age)
			DestroyFramebuf(vfb);
			vfbs_.erase(vfbs_.begin() + i--);
		}
	}

	// Do the same for ReadFramebuffersToMemory's VFBs
	for (size_t i = 0; i < bvfbs_.size(); ++i) {
		VirtualFramebuffer *vfb = bvfbs_[i];
		int age = frameLastFramebufUsed - vfb->last_frame_render;
		if (age > FBO_OLD_AGE) {
			INFO_LOG(SCEGE, "Decimating FBO for %08x (%i x %i x %i), age %i", vfb->fb_address, vfb->width, vfb->height, vfb->format, age)
			DestroyFramebuf(vfb);
			bvfbs_.erase(bvfbs_.begin() + i--);
		}
	}
}

void FramebufferManager::DestroyAllFBOs() {
	fbo_unbind();
	currentRenderVfb_ = 0;
	displayFramebuf_ = 0;
	prevDisplayFramebuf_ = 0;
	prevPrevDisplayFramebuf_ = 0;

	for (size_t i = 0; i < vfbs_.size(); ++i) {
		VirtualFramebuffer *vfb = vfbs_[i];
		INFO_LOG(SCEGE, "Destroying FBO for %08x : %i x %i x %i", vfb->fb_address, vfb->width, vfb->height, vfb->format);
		DestroyFramebuf(vfb);
	}
	vfbs_.clear();
}

void FramebufferManager::UpdateFromMemory(u32 addr, int size) {
	addr &= ~0x40000000;
	// TODO: Could go through all FBOs, but probably not important?
	// TODO: Could also check for inner changes, but video is most important.
	if (addr == DisplayFramebufAddr() || addr == PrevDisplayFramebufAddr()) {
		// TODO: Deleting the FBO is a heavy hammer solution, so let's only do it if it'd help.
		if (!Memory::IsValidAddress(displayFramebufPtr_))
			return;

		fbo_unbind();
		currentRenderVfb_ = 0;

		bool needUnbind = false;
		for (size_t i = 0; i < vfbs_.size(); ++i) {
			VirtualFramebuffer *vfb = vfbs_[i];
			if (MaskedEqual(vfb->fb_address, addr)) {
				vfb->dirtyAfterDisplay = true;
				vfb->reallyDirtyAfterDisplay = true;
				// TODO: This without the fbo_unbind() above would be better than destroying the FBO.
				// However, it doesn't seem to work for Star Ocean, at least
				if (useBufferedRendering_ && vfb->fbo) {
					fbo_bind_as_render_target(vfb->fbo);
					needUnbind = true;
					DrawPixels(Memory::GetPointer(addr | 0x04000000), vfb->format, vfb->fb_stride);
				} else {
					INFO_LOG(SCEGE, "Invalidating FBO for %08x (%i x %i x %i)", vfb->fb_address, vfb->width, vfb->height, vfb->format)
					DestroyFramebuf(vfb);
					vfbs_.erase(vfbs_.begin() + i--);
				}
			}
		}

		if (needUnbind)
			fbo_unbind();
	}
}

void FramebufferManager::Resized() {
	resized_ = true;
}

bool FramebufferManager::GetCurrentFramebuffer(GPUDebugBuffer &buffer) {
	u32 fb_address = gstate.getFrameBufRawAddress();
	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 | 0x04000000), fb_stride, 512, gstate.FrameBufFormat());
		return true;
	}

	buffer.Allocate(vfb->renderWidth, vfb->renderHeight, GE_FORMAT_8888, true);
	if (vfb->fbo)
		fbo_bind_for_read(vfb->fbo);
#ifndef USING_GLES2
	glReadBuffer(GL_COLOR_ATTACHMENT0);
#endif
	glPixelStorei(GL_PACK_ALIGNMENT, 4);
	glReadPixels(0, 0, vfb->renderWidth, vfb->renderHeight, GL_RGBA, GL_UNSIGNED_BYTE, buffer.GetData());

	return true;
}

bool FramebufferManager::GetCurrentDepthbuffer(GPUDebugBuffer &buffer) {
	u32 fb_address = gstate.getFrameBufRawAddress();
	int fb_stride = gstate.fbwidth & 0x3C0;

	u32 z_address = gstate.getDepthBufRawAddress();
	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?
		// TODO: Is the value 16-bit?  It seems to be.
		buffer = GPUDebugBuffer(Memory::GetPointer(z_address | 0x04000000), z_stride, 512, GPU_DBG_FORMAT_16BIT);
		return true;
	}

#ifndef USING_GLES2
	buffer.Allocate(vfb->renderWidth, vfb->renderHeight, GPU_DBG_FORMAT_16BIT, true);
	if (vfb->fbo)
		fbo_bind_for_read(vfb->fbo);
	glReadBuffer(GL_DEPTH_ATTACHMENT);
	glPixelStorei(GL_PACK_ALIGNMENT, 4);
	glReadPixels(0, 0, vfb->renderWidth, vfb->renderHeight, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, buffer.GetData());

	return true;
#else
	return false;
#endif
}

bool FramebufferManager::GetCurrentStencilbuffer(GPUDebugBuffer &buffer) {
	u32 fb_address = gstate.getFrameBufRawAddress();
	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?
		// TODO: Actually get the stencil.
		buffer = GPUDebugBuffer(Memory::GetPointer(fb_address | 0x04000000), fb_stride, 512, GPU_DBG_FORMAT_8888);
		return true;
	}

#ifndef USING_GLES2
	buffer.Allocate(vfb->renderWidth, vfb->renderHeight, GPU_DBG_FORMAT_8BIT, true);
	if (vfb->fbo)
		fbo_bind_for_read(vfb->fbo);
	glReadBuffer(GL_STENCIL_ATTACHMENT);
	glPixelStorei(GL_PACK_ALIGNMENT, 2);
	glReadPixels(0, 0, vfb->renderWidth, vfb->renderHeight, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, buffer.GetData());

	return true;
#else
	return false;
#endif
}