ppsspp/GPU/GLES/TextureCache.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/.

#if defined(ANDROID) || defined(BLACKBERRY)
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#else
#include <GL/glew.h>
#if defined(__APPLE__)
#include <OpenGL/gl.h>
#else
#include <GL/gl.h>
#endif
#endif

#include <map>

#include "../../Core/MemMap.h"
#include "../ge_constants.h"
#include "../GPUState.h"
#include "TextureCache.h"


struct TexCacheEntry
{
	u32 addr;
	u32 hash;
	u32 frameCounter;
	u32 numMips;
	u32 format;
	u32 clutaddr;
	u32 clutformat;
	u32 cluthash;
	int dim;
	GLuint texture;
};

typedef std::map<u32, TexCacheEntry> TexCache;
static TexCache cache;

u32 tmpTexBuf32[1024 * 1024];
u16 tmpTexBuf16[1024 * 1024];

u16 tmpTexBufRearrange[1024 * 1024];


u32 clutBuf32[4096];
u16 clutBuf16[4096];

void TextureCache_Clear(bool delete_them)
{
	if (delete_them)
	{
		for (TexCache::iterator iter = cache.begin(); iter != cache.end(); ++iter)
		{
			DEBUG_LOG(G3D, "Deleting texture %i", iter->second.texture);
			glDeleteTextures(1, &iter->second.texture);
		}
	}
	if (cache.size()) {
		INFO_LOG(G3D, "Texture cached cleared from %i textures", (int)cache.size());
		cache.clear();
	}
}

u32 GetClutAddr(u32 clutEntrySize)
{
	return ((gstate.clutaddr & 0xFFFFFF) | ((gstate.clutaddrupper << 8) & 0x0F000000)) + ((gstate.clutformat >> 16) & 0x1f) * clutEntrySize;
}

u32 GetClutIndex(u32 index)
{
	return ((((gstate.clutformat >> 16) & 0x1f) + index) >> ((gstate.clutformat >> 2) & 0x1f)) & ((gstate.clutformat >> 8) & 0xff);
}

u16 *ReadClut16()
{
	u32 clutNumEntries = (gstate.loadclut & 0x3f) * 16;
	u32 clutAddr = GetClutAddr(2);
	for (u32 i = ((gstate.clutformat >> 16) & 0x1f); i < clutNumEntries; i++)
		clutBuf16[i] = Memory::Read_U16(clutAddr + i * 2);
	return clutBuf16;
}

u32 *ReadClut32()
{
	u32 clutNumEntries = (gstate.loadclut & 0x3f) * 8;
	u32 clutAddr = GetClutAddr(4);
	for (u32 i = ((gstate.clutformat >> 16) & 0x1f); i < clutNumEntries; i++)
		clutBuf32[i] = Memory::Read_U32(clutAddr + i * 4);
	return clutBuf32;
}

void *UnswizzleFromMem(u32 texaddr, u32 bytesPerPixel, u32 level)
{
	u32 addr = texaddr;
	u32 rowWidth = (bytesPerPixel > 0) ? ((gstate.texbufwidth[level] & 0x3FF) * bytesPerPixel) : ((gstate.texbufwidth[level] & 0x3FF) / 2);
	u32 pitch = rowWidth / 4;
	u32 bxc = rowWidth / 16;
	u32 byc = ((1 << ((gstate.texsize[level] >> 8) & 0xf)) + 7) / 8;
	if (byc == 0)
		byc = 1;

	u32 ydest = 0;

	u32 by;
	for (by = 0; by < byc; by++)
	{
		if (rowWidth >= 16)
		{
			u32 xdest = ydest;
			u32 bx;
			for (bx = 0; bx < bxc; bx++)
			{
				u32 dest = xdest;
				u8 n;
				for (n = 0; n < 8; n++)
				{
					u32 k;
					for (k = 0; k < 4; k++) {
						tmpTexBuf32[dest + k] = Memory::Read_U32(addr);
						addr += 4;
					}
					dest += pitch;
				}
				xdest += 4;
			}
			ydest += (rowWidth * 8) / 4;
		}
		else if (rowWidth == 8)
		{
			u32 n;
			for (n = 0; n < 8; n++, ydest += 2)
			{
				tmpTexBuf32[ydest + 0] = Memory::Read_U32(addr + 0);
				tmpTexBuf32[ydest + 1] = Memory::Read_U32(addr + 4);
				addr += 16; // skip two u32
			}
		}
		else if (rowWidth == 4)
		{
			u32 n;
			for (n = 0; n < 8; n++, ydest++) {
				tmpTexBuf32[ydest] = Memory::Read_U32(addr);
				addr += 16;
			}
		}
		else if (rowWidth == 2)
		{
			u32 n;
			for (n = 0; n < 4; n++, ydest++)
			{
				u16 n1 = Memory::Read_U32(addr +  0) & 0xffff;
				u16 n2 = Memory::Read_U32(addr + 16) & 0xffff;
				tmpTexBuf32[ydest] = (u32)n1 | ((u32)n2 << 16);
				addr += 32;
			}
		}
		else if (rowWidth == 1)
		{
			u32 n;
			for (n = 0; n < 2; n++, ydest++)
			{
				u8 n1 = Memory::Read_U32(addr +  0) & 0xf;
				u8 n2 = Memory::Read_U32(addr + 16) & 0xf;
				u8 n3 = Memory::Read_U32(addr + 32) & 0xf;
				u8 n4 = Memory::Read_U32(addr + 48) & 0xf;

				tmpTexBuf32[ydest] = (u32)n1 | ((u32)n2 << 8) | ((u32)n3 << 16) | ((u32)n4 << 24);
			}
		}
	}
	return tmpTexBuf32;
}

void *readIndexedTex(u32 level, u32 texaddr, u32 bytesPerIndex)
{
	u32 length = (gstate.texbufwidth[level] & 0x3FF) * (1 << ((gstate.texsize[level] >> 8) & 0xf));
	void *buf = NULL;

	switch ((gstate.clutformat & 3))
	{
	case GE_CMODE_16BIT_BGR5650:
	case GE_CMODE_16BIT_ABGR5551:
	case GE_CMODE_16BIT_ABGR4444:
		{
		u16 *clut = ReadClut16();
		if (!(gstate.texmode & 1))
		{
			u32 i;
			switch (bytesPerIndex)
			{
			case 1:
				for (i = 0; i < length; i++) {
					u8 index = Memory::Read_U8(texaddr + i);
					tmpTexBuf16[i] = clut[GetClutIndex(index)];
				}
				break;

			case 2:
				for (i = 0; i < length; i++) {
					u16 index = Memory::Read_U16(texaddr + i * 2);
					tmpTexBuf16[i] = clut[GetClutIndex(index)];
				}
				break;

			case 4:
				for (i = 0; i < length; i++) {
					u32 index = Memory::Read_U32(texaddr + i * 4);
					tmpTexBuf16[i] = clut[GetClutIndex(index)];
				}
				break;
			}
		}
		else
		{
			u32 i, j;
			UnswizzleFromMem(texaddr, bytesPerIndex, level);
			switch (bytesPerIndex)
			{
			case 1:
				for (i = 0, j = 0; i < length; i += 4, j++)
				{
					u32 n = tmpTexBuf32[j];
					u32 k;
					for (k = 0; k < 4; k++) {
						u8 index = (n >> (k * 4)) & 0xff;
						tmpTexBuf16[i + k] = clut[GetClutIndex(index)];
					}
				}
				break;

			case 2:
				for (i = 0, j = 0; i < length; i += 2, j++)
				{
					u32 n = tmpTexBuf32[j];
					tmpTexBuf16[i + 0] = clut[GetClutIndex(n & 0xffff)];
					tmpTexBuf16[i + 1] = clut[GetClutIndex(n >> 16)];
				}
				break;

			case 4:
				for (i = 0; i < length; i++) {
					u32 n = tmpTexBuf32[i];
					tmpTexBuf16[i] = clut[GetClutIndex(n)];
				}
				break;
			}
		}
		buf = tmpTexBuf16;
		}
		break;

	case GE_CMODE_32BIT_ABGR8888:
		{
		u32 *clut = ReadClut32();
		if (!(gstate.texmode & 1))
		{
			u32 i;
			switch (bytesPerIndex)
			{
			case 1:
				for (i = 0; i < length; i++) {
					u8 index = Memory::Read_U8(texaddr + i);
					tmpTexBuf32[i] = clut[GetClutIndex(index)];
				}
				break;

			case 2:
				for (i = 0; i < length; i++) {
					u16 index = Memory::Read_U16(texaddr + i * 2);
					tmpTexBuf32[i] = clut[GetClutIndex(index)];
				}
				break;

			case 4:
				for (i = 0; i < length; i++) {
					u32 index = Memory::Read_U32(texaddr + i * 4);
					tmpTexBuf32[i] = clut[GetClutIndex(index)];
				}
				break;
			}
		}
		else
		{
			u32 j;
			s32 i;
			UnswizzleFromMem(texaddr, bytesPerIndex, level);
			switch (bytesPerIndex)
			{
			case 1:
				for (i = length - 4, j = (length / 4) - 1; i >= 0; i -= 4, j--)
				{
					u32 n = tmpTexBuf32[j];
					u32 k;
					for (k = 0; k < 4; k++) {
						u32 index = (n >> (k * 8)) & 0xff;
						tmpTexBuf32[i + k] = clut[GetClutIndex(index)];
					}
				}
				break;

			case 2:
				for (i = length - 2, j = (length / 2) - 1; i >= 0; i -= 2, j--)
				{
					u32 n = tmpTexBuf32[j];
					tmpTexBuf32[i + 0] = clut[GetClutIndex(n & 0xffff)];
					tmpTexBuf32[i + 1] = clut[GetClutIndex(n >> 16)];
				}
				break;

			case 4:
				for (i = 0; (u32)i < length; i++) {
					u32 n = tmpTexBuf32[i];
					tmpTexBuf32[i] = clut[GetClutIndex(n)];
				}
				break;
			}
		}
		buf = tmpTexBuf32;
		}
		break;

	default:
		ERROR_LOG(G3D, "Unhandled clut texture mode %d!!!", (gstate.clutformat & 3));
		break;
	}

	return buf;
}

GLenum getClutDestFormat(GEPaletteFormat format)
{
	switch (format)
	{
	case GE_CMODE_16BIT_ABGR4444:
		return GL_UNSIGNED_SHORT_4_4_4_4;
	case GE_CMODE_16BIT_ABGR5551:
		return GL_UNSIGNED_SHORT_5_5_5_1;
	case GE_CMODE_16BIT_BGR5650:
		return GL_UNSIGNED_SHORT_5_6_5;
	case GE_CMODE_32BIT_ABGR8888:
		return GL_UNSIGNED_BYTE;
	}
	return 0;
}

u32 texByteAlignMap[] = {2, 2, 2, 4};

// This should not have to be done per texture! OpenGL is silly yo
// TODO: Dirty-check this against the current texture.
void UpdateSamplingParams()
{
	int minFilt = gstate.texfilter & 0x7;
	int magFilt = (gstate.texfilter>>8)&1;
	minFilt &= 1; //no mipmaps yet

	int sClamp = gstate.texwrap & 1;
	int tClamp = (gstate.texwrap>>8) & 1;
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, sClamp ? GL_CLAMP_TO_EDGE : GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, tClamp ? GL_CLAMP_TO_EDGE : GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilt ? GL_LINEAR : GL_NEAREST);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilt ? GL_LINEAR : GL_NEAREST);
}


// Convert from PSP bit order to GLES bit order
u16 convert565(u16 c) {
	return (c >> 11) | (c & 0x07E0) | (c << 11);
}

// Convert from PSP bit order to GLES bit order
u16 convert4444(u16 c) {
	return (c >> 12) | ((c >> 4) & 0xF0) | ((c << 4) & 0xF00) | (c << 12);
}

// Convert from PSP bit order to GLES bit order
u16 convert5551(u16 c) {
	return ((c & 0x8000) >> 15) | (c << 1);
}

struct DXT1Block
{
	u8 lines[4];
	u16 color1;
	u16 color2;
};

inline u32 makecol(int r, int g, int b, int a)
{
	return (a << 24)|(r << 16)|(g << 8)|b;
}

void decodeDXT1Block(u32 *dst, const DXT1Block *src, int pitch)
{
	// S3TC Decoder
	// Needs more speed and debugging.
	u16 c1 = src->color1;
	u16 c2 = src->color2;
	int blue1 = Convert5To8(c1 & 0x1F);
	int blue2 = Convert5To8(c2 & 0x1F);
	int green1 = Convert6To8((c1 >> 5) & 0x3F);
	int green2 = Convert6To8((c2 >> 5) & 0x3F);
	int red1 = Convert5To8((c1 >> 11) & 0x1F);
	int red2 = Convert5To8((c2 >> 11) & 0x1F);
	int colors[4];
	colors[0] = makecol(red1, green1, blue1, 255);
	colors[1] = makecol(red2, green2, blue2, 255);
	if (c1 > c2)
	{
		int blue3 = ((blue2 - blue1) >> 1) - ((blue2 - blue1) >> 3);
		int green3 = ((green2 - green1) >> 1) - ((green2 - green1) >> 3);
		int red3 = ((red2 - red1) >> 1) - ((red2 - red1) >> 3);				
		colors[2] = makecol(red1 + red3, green1 + green3, blue1 + blue3, 255);
		colors[3] = makecol(red2 - red3, green2 - green3, blue2 - blue3, 255);
	}
	else
	{
		colors[2] = makecol((red1 + red2 + 1) / 2, // Average
			(green1 + green2 + 1) / 2,
			(blue1 + blue2 + 1) / 2, 255);
		colors[3] = makecol(red2, green2, blue2, 0);	// Color2 but transparent
	}

	for (int y = 0; y < 4; y++)
	{
		int val = src->lines[y];
		for (int x = 0; x < 4; x++)
		{
			dst[x] = colors[(val >> 6) & 3];
			val <<= 2;
		}
		dst += pitch;
	}
}

void convertColors(u8 *finalBuf, GLuint dstFmt, int numPixels)
{
	switch (dstFmt) {
	case GL_UNSIGNED_SHORT_4_4_4_4:
		{
			u16 *p = (u16 *)finalBuf;
			for (int i = 0; i < numPixels; i++) {
				u16 c = p[i];
				p[i] = (c >> 12) | ((c >> 4) & 0xF0) | ((c << 4) & 0xF00) | (c << 12);
			}
		}
		break;
	case GL_UNSIGNED_SHORT_5_5_5_1:
		{
			u16 *p = (u16 *)finalBuf;
			for (int i = 0; i < numPixels; i++) {
				u16 c = p[i];
				p[i] = ((c & 0x8000) >> 15) | ((c >> 9) & 0x3E) | ((c << 1) & 0x7C0) | ((c << 11) & 0xF800);
			}
		}
		break;
	case GL_UNSIGNED_SHORT_5_6_5:
		{
			u16 *p = (u16 *)finalBuf;
			for (int i = 0; i < numPixels; i++) {
				u16 c = p[i];
				p[i] = (c >> 11) | (c & 0x07E0) | (c << 11);
			}
		}
		break;
	default:
		{
			//u32 *p = (u32 *)finalBuf;
			//for (int i = 0; i < numPixels; i++) {
			//	p[i] = _byteswap_ulong(p[i]);
			//}
		}
		break;
	}
}

void PSPSetTexture()
{
	u32 texaddr = (gstate.texaddr[0] & 0xFFFFF0) | ((gstate.texbufwidth[0]<<8) & 0xFF000000);
	texaddr &= 0xFFFFFFF;

	if (!texaddr) return;

	u8 level = 0;
	int format = gstate.texformat & 0xF;
	int clutformat = gstate.clutformat & 3;

	DEBUG_LOG(G3D,"Texture at %08x",texaddr);
	u8 *texptr = Memory::GetPointer(texaddr);

	TexCache::iterator iter = cache.find(texaddr);
	if (iter != cache.end())
	{
		//Validate the texture here (width, height etc)
		TexCacheEntry &entry = iter->second;

		int dim = gstate.texsize[0] & 0xF0F;
		bool match = true;
		
		//TODO: Check more texture parameters, compute real texture hash
		if(dim != entry.dim || entry.hash != *(u32*)texptr || entry.format != format)
			match = false;

		//TODO: Check more clut parameters, compute clut hash
		if(match && (format >= GE_TFMT_CLUT4 && format <= GE_TFMT_CLUT32) &&
			(entry.clutformat != clutformat ||
		     entry.clutaddr   != GetClutAddr(clutformat == GE_CMODE_32BIT_ABGR8888 ? 4 : 2) ||
			 entry.cluthash   != Memory::Read_U32(entry.clutaddr)))
			match = false;

		if (match)
		{
			//got one!
			glBindTexture(GL_TEXTURE_2D, entry.texture);
			UpdateSamplingParams();
			DEBUG_LOG(G3D,"Texture at %08x Found in Cache, applying", texaddr);
			return; //Done!
		}
		else
		{
			NOTICE_LOG(G3D,"Texture different or overwritten, reloading at %08x", texaddr);

			//Damnit, got overwritten.
			//if (dim != entry.dim)
			//{
			//	glDeleteTextures(1, &entry.texture);
			//}
			cache.erase(iter);
		}
	}
	else
	{
		NOTICE_LOG(G3D,"No texture in cache, decoding...");
	}

	//we have to decode it

	TexCacheEntry entry;

	entry.addr = texaddr;
	entry.hash = *(u32*)texptr;
	entry.format = format;

	if(format >= GE_TFMT_CLUT4 && format <= GE_TFMT_CLUT32)
	{
		entry.clutformat = clutformat;
		entry.clutaddr = GetClutAddr(clutformat == GE_CMODE_32BIT_ABGR8888 ? 4 : 2);
		entry.cluthash = Memory::Read_U32(entry.clutaddr);
	}
	else
	{
		entry.clutaddr = 0;
	}

	glGenTextures(1, &entry.texture);
	NOTICE_LOG(G3D, "Creating texture %i", entry.texture);

	glBindTexture(GL_TEXTURE_2D, entry.texture);
			
	u32 bufw = gstate.texbufwidth[0] & 0x3ff;
	
	entry.dim = gstate.texsize[0] & 0xF0F;

	u32 w = 1 << (gstate.texsize[0] & 0xf);
	u32 h = 1 << ((gstate.texsize[0]>>8) & 0xf);

	gstate_c.curTextureWidth=w;
	gstate_c.curTextureHeight=h;
	GLenum dstFmt = 0;
	u32 texByteAlign = 1;

	void *finalBuf = NULL;

	DEBUG_LOG(G3D,"Texture Width %04x Height %04x Bufw %d Fmt %d", w, h, bufw, format);

	// TODO: Look into using BGRA for 32-bit textures when the GL_EXT_texture_format_BGRA8888 extension is available, as it's faster than RGBA on some chips.

	switch (format)
	{
	case GE_TFMT_CLUT4:
		dstFmt = getClutDestFormat((GEPaletteFormat)(gstate.clutformat & 3));
		switch (clutformat)
		{
		case GE_CMODE_16BIT_BGR5650:
		case GE_CMODE_16BIT_ABGR5551:
		case GE_CMODE_16BIT_ABGR4444:
			{
			u16 *clut = ReadClut16();
			u32 clutSharingOff = 0;//gstate.mipmapShareClut ? 0 : level * 16;
			texByteAlign = 2;
			if (!(gstate.texmode & 1))
			{
				u32 i;
				u32 addr = texaddr;
				for (i = 0; i < bufw * h; i += 2)
				{
					u32 index = Memory::Read_U32(addr);
					tmpTexBuf16[i + 0] = clut[GetClutIndex((index >> 0) & 0xf) + clutSharingOff];
					tmpTexBuf16[i + 1] = clut[GetClutIndex((index >> 4) & 0xf) + clutSharingOff];
					addr++;
				}
			}
			else
			{
				u32 i, j;
				UnswizzleFromMem(texaddr, 0, level);
				for (i = 0, j = 0; i < bufw * h; i += 8, j++)
				{
					u32 n = tmpTexBuf32[j];
					u32 k, index;
					for (k = 0; k < 8; k++) {
						index = (n >> (k * 4)) & 0xf;
						tmpTexBuf16[i + k] = clut[GetClutIndex(index) + clutSharingOff];
					}
				}
			}
			finalBuf = tmpTexBuf16;
			}
			break;

		case GE_CMODE_32BIT_ABGR8888:
			{
			u32 *clut = ReadClut32();
			u32 clutSharingOff = 0;//gstate.mipmapShareClut ? 0 : level * 16;
			if (!(gstate.texmode & 1))
			{
				u32 i;
				u32 addr = texaddr;
				for (i = 0; i < bufw * h; i += 2)
				{
					u32 index = Memory::Read_U32(addr);
					tmpTexBuf32[i + 0] = clut[GetClutIndex((index >> 0) & 0xf) + clutSharingOff];
					tmpTexBuf32[i + 1] = clut[GetClutIndex((index >> 4) & 0xf) + clutSharingOff];
					addr++;
				}
			}
			else
			{
				s32 i;
				u32 j;
				u32 pixels = bufw * h;
				UnswizzleFromMem(texaddr, 0, level);
				for (i = pixels - 8, j = (pixels / 8) - 1; i >= 0; i -= 8, j--)
				{
					u32 n = tmpTexBuf32[j];
					u32 k, index;
					for (k = 0; k < 8; k++) {
						index = (n >> (k * 4)) & 0xf;
						tmpTexBuf32[i + k] = clut[GetClutIndex(index) + clutSharingOff];
					}
				}
			}
			finalBuf = tmpTexBuf32;
			}
			break;

		default:
			ERROR_LOG(G3D, "Unknown CLUT4 texture mode %d", (gstate.clutformat & 3));
			return;
		}
		break;

	case GE_TFMT_CLUT8:
		finalBuf = readIndexedTex(level, texaddr, 1);
		dstFmt = getClutDestFormat((GEPaletteFormat)(gstate.clutformat & 3));
		texByteAlign = texByteAlignMap[(gstate.clutformat & 3)];
		break;

	case GE_TFMT_CLUT16:
		finalBuf = readIndexedTex(level, texaddr, 2);
		dstFmt = getClutDestFormat((GEPaletteFormat)(gstate.clutformat & 3));
		texByteAlign = texByteAlignMap[(gstate.clutformat & 3)];
		break;

	case GE_TFMT_CLUT32:
		finalBuf = readIndexedTex(level, texaddr, 4);
		dstFmt = getClutDestFormat((GEPaletteFormat)(gstate.clutformat & 3));
		texByteAlign = texByteAlignMap[(gstate.clutformat & 3)];
		break;

	case GE_TFMT_4444:
	case GE_TFMT_5551:
	case GE_TFMT_5650:
		if (format == GE_TFMT_4444)
			dstFmt = GL_UNSIGNED_SHORT_4_4_4_4;
		else if (format == GE_TFMT_5551)
			dstFmt = GL_UNSIGNED_SHORT_5_5_5_1;
		else if (format == GE_TFMT_5650)
			dstFmt = GL_UNSIGNED_SHORT_5_6_5;
		texByteAlign = 2;

		if (!(gstate.texmode & 1))
		{
			u32 len = (bufw > w ? bufw : w) * h;
			u32 i;
			for (i = 0; i < len; i++)
				tmpTexBuf16[i] = Memory::Read_U16(texaddr + i * 2);
			finalBuf = tmpTexBuf16;
		}
		else
			finalBuf = UnswizzleFromMem(texaddr, 2, level);
		break;

	case GE_TFMT_8888:
		dstFmt = GL_UNSIGNED_BYTE;
		if (!(gstate.texmode & 1))
		{
			u32 len = bufw * h;
			u32 i;
			for (i = 0; i < len; i++)
				tmpTexBuf32[i] = Memory::Read_U32(texaddr + i * 4);
			finalBuf = tmpTexBuf32;
		}
		else
			finalBuf = UnswizzleFromMem(texaddr, 4, level);
		break;

	case GE_TFMT_DXT1:
		ERROR_LOG(G3D, "Partial DXT1 texture decoding");
		dstFmt = GL_UNSIGNED_BYTE;
		{
			// THIS IS VERY BROKEN but can be debugged! :)
			u32 *dst = tmpTexBuf32;
			DXT1Block *src = (DXT1Block*)texptr;

			for (u32 y=0; y<h/4; y++)
			{
				u32 i = y*w/4;
				for (u32 x=0; x<w/4; x++)
				{
					decodeDXT1Block(dst + w*4 * y * 4 + x * 4, src + i, w);
					i++;
				}
			}
		}
		break;

	case GE_TFMT_DXT3:
	case GE_TFMT_DXT5:
		ERROR_LOG(G3D, "Unhandled compressed texture!");
		break;

	default:
		ERROR_LOG(G3D, "Unknown Texture Format %d!!!", format);
		return;
	}

	convertColors((u8*)finalBuf, dstFmt, bufw * h);

	if (w != bufw) {
		int pixelSize;
		switch (dstFmt) {
		case GL_UNSIGNED_SHORT_4_4_4_4:
		case GL_UNSIGNED_SHORT_5_5_5_1:
		case GL_UNSIGNED_SHORT_5_6_5:
			pixelSize = 2;
			break;
		default:
			pixelSize = 4;
			break;
		}
		// Need to rearrange the buffer to simulate GL_UNPACK_ROW_LENGTH etc.
		int inRowBytes = bufw * pixelSize;
		int outRowBytes = w * pixelSize;
		const u8 *read = (const u8 *)finalBuf;
		u8 *write = 0;
		if (w > bufw) {
			write = (u8 *)tmpTexBufRearrange;
			finalBuf = tmpTexBufRearrange;
		} else {
			write = (u8 *)finalBuf;
		}
		for (int y = 0; y < h; y++) {
			memmove(write, read, outRowBytes);
			read += inRowBytes;
			write += outRowBytes;
		}
	}

	// Can restore these and remove the above fixup on some platforms.
	//glPixelStorei(GL_UNPACK_ROW_LENGTH, bufw);
	glPixelStorei(GL_UNPACK_ALIGNMENT, texByteAlign);
	//glPixelStorei(GL_PACK_ROW_LENGTH, bufw);
	glPixelStorei(GL_PACK_ALIGNMENT, texByteAlign);

	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, dstFmt, finalBuf);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

	// glGenerateMipmap(GL_TEXTURE_2D);
	UpdateSamplingParams();

	//glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	//glPixelStorei(GL_PACK_ROW_LENGTH, 0);
	glPixelStorei(GL_PACK_ALIGNMENT, 1);

	cache[texaddr] = entry;
}