/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#include "degl.h"

#include "context.h"

#include "ColorDescriptor.h"

#include "ImageTarget.h"

void* deglGetHostProcAddress(char const* proc)

{

	return EGLtoGLES2Interface::GetEGLInterface()->GetHostProcAddress(proc);

}

DGLContext* deglGetCurrentContext(void)

{

	DGLContext* ctx = static_cast<DGLContext*>(EGLtoGLES2Interface::GetEGLInterface()->GetGLESContext());

	return ctx;

}

int deglLockSurface(int read, int draw)

{

	return EGLtoGLES2Interface::GetEGLInterface()->LockGLESSurface(!!read, !!draw);

}

int deglUnlockSurface(void)

{

	return EGLtoGLES2Interface::GetEGLInterface()->UnlockGLESSurface();

}

static EImageTarget dglGLenumToImageTarget(GLenum target)

{

	switch(target)

	{

		case GL_TEXTURE_2D:

			return IMAGE_TARGET_TEXTURE_2D;

		case GL_TEXTURE_CUBE_MAP_POSITIVE_X:

			return IMAGE_TARGET_TEXTURE_CUBE_MAP_POSITIVE_X;

		case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:

			return IMAGE_TARGET_TEXTURE_CUBE_MAP_NEGATIVE_X;

		case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:

			return IMAGE_TARGET_TEXTURE_CUBE_MAP_POSITIVE_Y;

		case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:

			return IMAGE_TARGET_TEXTURE_CUBE_MAP_NEGATIVE_Y;

		case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:

			return IMAGE_TARGET_TEXTURE_CUBE_MAP_POSITIVE_Z;

		case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:

			return IMAGE_TARGET_TEXTURE_CUBE_MAP_NEGATIVE_Z;

		case GL_RENDERBUFFER:

			return IMAGE_TARGET_RENDERBUFFER;

		default:

			DGLES2_ASSERT(false);

	}

	// Not reached.

	return (EImageTarget)-1;

}

void deglRegisterImageTarget(GLeglImageOES image, GLenum target, GLuint name)

{

	EGLtoGLES2Interface::GetEGLInterface()->RegisterImageTarget(image, dglGLenumToImageTarget(target), (void*)name);

}

void deglUnregisterImageTarget(GLeglImageOES image, GLenum target, GLuint name)

{

	EGLtoGLES2Interface::GetEGLInterface()->UnregisterImageTarget(image, dglGLenumToImageTarget(target), (void*)name);

}

void deglUpdateImageSiblings(GLeglImageOES image, GLenum target, GLuint name)

{

	EGLtoGLES2Interface::GetEGLInterface()->UpdateImageSiblings(image, dglGLenumToImageTarget(target), (void*)name);

}

void deglReleaseTexImage(void* surface, int name, int level)

{

	EGLtoGLES2Interface::GetEGLInterface()->ReleaseTexImage(surface, name, level);

}

static SurfaceDescriptor dglCreateSurfaceDescriptor(int redBits, int redShift, int greenBits, int greenShift, int blueBits, int blueShift, int alphaBits, int alphaShift, int luminanceBits, int luminanceShift, CColorDescriptor::ColorFormat format, int bpp)

{

	SurfaceDescriptor desc;

	desc.m_colorDescriptor.m_redSize = redBits;

	desc.m_colorDescriptor.m_greenSize = greenBits;

	desc.m_colorDescriptor.m_blueSize = blueBits;

	desc.m_colorDescriptor.m_alphaSize = alphaBits;

	desc.m_colorDescriptor.m_luminanceSize = luminanceBits;

	desc.m_redShift = redShift;

	desc.m_greenShift = greenShift;

	desc.m_blueShift = blueShift;

	desc.m_alphaShift = alphaShift;

	desc.m_luminanceShift = luminanceShift;

	desc.m_colorDescriptor.m_format = format;

	desc.m_colorDescriptor.m_bpp = bpp;

	return desc;

}

typedef struct

{

	SurfaceDescriptor desc;

	GLenum internal_format;

	GLenum data_format;

	GLenum data_type;

} DescToEnumMapping;

static bool dglIsDescEqualToMapping(const SurfaceDescriptor& desc, const DescToEnumMapping& mapping)

{

    if ((desc.m_colorDescriptor.m_redSize == mapping.desc.m_colorDescriptor.m_redSize) &&

		(desc.m_colorDescriptor.m_greenSize == mapping.desc.m_colorDescriptor.m_greenSize) &&

        (desc.m_colorDescriptor.m_blueSize == mapping.desc.m_colorDescriptor.m_blueSize) &&

		(desc.m_colorDescriptor.m_alphaSize == mapping.desc.m_colorDescriptor.m_alphaSize) &&

		(desc.m_colorDescriptor.m_luminanceSize == mapping.desc.m_colorDescriptor.m_luminanceSize) &&

        (desc.m_redShift == mapping.desc.m_redShift) &&

        (desc.m_greenShift == mapping.desc.m_greenShift) &&

        (desc.m_blueShift == mapping.desc.m_blueShift) &&

        (desc.m_alphaShift == mapping.desc.m_alphaShift) &&

        (desc.m_luminanceShift == mapping.desc.m_luminanceShift) &&

        (desc.m_colorDescriptor.m_format == mapping.desc.m_colorDescriptor.m_format) &&

		(desc.m_colorDescriptor.m_bpp == mapping.desc.m_colorDescriptor.m_bpp))

        return true;

    return false;

}

static void dglSurfaceDescriptorToGLEnums(const SurfaceDescriptor& desc, GLenum& internal_format, GLenum& data_format, GLenum& data_type)

{

	static const DescToEnumMapping map[] = {

		/* RGB{A,X} channel ordering */

		 // sRGBX_8888

		{dglCreateSurfaceDescriptor(8, 24, 8, 16, 8, 8, 0, 0, 0, 0, CColorDescriptor::sRGBA, 32), GL_SRGB8, GL_RGBA, GL_UNSIGNED_BYTE},

		 // sRGBA_8888

		{dglCreateSurfaceDescriptor(8, 24, 8, 16, 8, 8, 8, 0, 0, 0, CColorDescriptor::sRGBA, 32), GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE},

         // sRGBA_8888_PRE

        {dglCreateSurfaceDescriptor(8, 24, 8, 16, 8, 8, 8, 0, 0, 0, CColorDescriptor::sRGBA_PRE, 32), GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE},

         // sRGB_565

        {dglCreateSurfaceDescriptor(5, 11, 6, 5, 5, 0, 0, 0, 0, 0, CColorDescriptor::sRGBA, 16), GL_SRGB8, GL_RGB, GL_UNSIGNED_SHORT_5_6_5},

         // sRGBA_5551

        {dglCreateSurfaceDescriptor(5, 11, 5, 6, 5, 1, 1, 0, 0, 0, CColorDescriptor::sRGBA, 16), GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1},

         // sRGBA_4444

        {dglCreateSurfaceDescriptor(4, 12, 4, 8, 4, 4, 4, 0, 0, 0, CColorDescriptor::sRGBA, 16), GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4},

         // sL_8

        {dglCreateSurfaceDescriptor(0, 0, 0, 0, 0, 0, 0, 0, 8, 0, CColorDescriptor::sLA, 8), GL_SLUMINANCE8, GL_LUMINANCE, GL_UNSIGNED_BYTE},

         // lRGBX_8888

        {dglCreateSurfaceDescriptor(8, 24, 8, 16, 8, 8, 0, 0, 0, 0, CColorDescriptor::lRGBA, 32), GL_RGB8, GL_RGBA, GL_UNSIGNED_BYTE},

         // lRGBA_8888

        {dglCreateSurfaceDescriptor(8, 24, 8, 16, 8, 8, 8, 0, 0, 0, CColorDescriptor::lRGBA, 32), GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE},

         // lRGBA_8888_PRE

        {dglCreateSurfaceDescriptor(8, 24, 8, 16, 8, 8, 8, 0, 0, 0, CColorDescriptor::lRGBA_PRE, 32), GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE},

         // lL_8

        {dglCreateSurfaceDescriptor(0, 0, 0, 0, 0, 0, 0, 0, 8, 0, CColorDescriptor::lLA, 8), GL_LUMINANCE8, GL_LUMINANCE, GL_UNSIGNED_BYTE},

         // A_8

        {dglCreateSurfaceDescriptor(0, 0, 0, 0, 0, 0, 8, 0, 0, 0, CColorDescriptor::lRGBA, 8), GL_ALPHA8, GL_ALPHA, GL_UNSIGNED_BYTE},

		// These should be converted to a compatible format by VG.

		/*

         // BW_1

        {dglCreateSurfaceDescriptor(0, 0, 0, 0, 0, 0, 0, 0, 1, 0, CColorDescriptor::lLA, 1), GL_NONE, GL_NONE, GL_NONE},

         // A_1

        {dglCreateSurfaceDescriptor(0, 0, 0, 0, 0, 0, 1, 0, 0, 0, CColorDescriptor::lRGBA, 1), GL_NONE, GL_NONE, GL_NONE},

         // A_4

        {dglCreateSurfaceDescriptor(0, 0, 0, 0, 0, 0, 4, 0, 0, 0, CColorDescriptor::lRGBA, 4), GL_NONE, GL_NONE, GL_NONE},

		*/

		/* {A,X}RGB channel ordering */

         // sXRGB_8888

        {dglCreateSurfaceDescriptor(8, 16, 8, 8, 8, 0, 0, 0, 0, 0, CColorDescriptor::sRGBA, 32), GL_SRGB8, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV},

         // sARGB_8888

        {dglCreateSurfaceDescriptor(8, 16, 8, 8, 8, 0, 8, 24, 0, 0, CColorDescriptor::sRGBA, 32), GL_SRGB8_ALPHA8, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV},

         // sARGB_8888_PRE

        {dglCreateSurfaceDescriptor(8, 16, 8, 8, 8, 0, 8, 24, 0, 0, CColorDescriptor::sRGBA_PRE, 32), GL_SRGB8_ALPHA8, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV},

         // sARGB_1555

        {dglCreateSurfaceDescriptor(5, 10, 5, 5, 5, 0, 1, 15, 0, 0, CColorDescriptor::sRGBA, 16), GL_SRGB8_ALPHA8, GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV},

         // sARGB_4444

        {dglCreateSurfaceDescriptor(4, 8, 4, 4, 4, 0, 4, 12, 0, 0, CColorDescriptor::sRGBA, 16), GL_SRGB8_ALPHA8, GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4_REV},

         // lXRGB_8888

        {dglCreateSurfaceDescriptor(8, 16, 8, 8, 8, 0, 0, 0, 0, 0, CColorDescriptor::lRGBA, 32), GL_RGB8, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV},

         // lARGB_8888

        {dglCreateSurfaceDescriptor(8, 16, 8, 8, 8, 0, 8, 24, 0, 0, CColorDescriptor::lRGBA, 32), GL_RGBA8, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV},

         // lARGB_8888_PRE

        {dglCreateSurfaceDescriptor(8, 16, 8, 8, 8, 0, 8, 24, 0, 0, CColorDescriptor::lRGBA_PRE, 32), GL_RGBA8, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV},

		/* BGR{A,X} channel ordering */

         // sBGRX_8888

		{dglCreateSurfaceDescriptor(8, 8, 8, 16, 8, 24, 0, 0, 0, 0, CColorDescriptor::sRGBA, 32), GL_SRGB8, GL_BGRA, GL_UNSIGNED_BYTE},

         // sBGRA_8888

        {dglCreateSurfaceDescriptor(8, 8, 8, 16, 8, 24, 8, 0, 0, 0, CColorDescriptor::sRGBA, 32), GL_SRGB8_ALPHA8, GL_BGRA, GL_UNSIGNED_BYTE},

         // sBGRA_8888_PRE

        {dglCreateSurfaceDescriptor(8, 8, 8, 16, 8, 24, 8, 0, 0, 0, CColorDescriptor::sRGBA_PRE, 32), GL_SRGB8_ALPHA8, GL_BGRA, GL_UNSIGNED_BYTE},

         // sBGR_565

        {dglCreateSurfaceDescriptor(5, 0, 6, 5, 5, 11, 0, 0, 0, 0, CColorDescriptor::sRGBA, 16), GL_SRGB8, GL_BGR, GL_UNSIGNED_SHORT_5_6_5},

         // sBGRA_5551

        {dglCreateSurfaceDescriptor(5, 1, 5, 6, 5, 11, 1, 0, 0, 0, CColorDescriptor::sRGBA, 16), GL_SRGB8_ALPHA8, GL_BGRA, GL_UNSIGNED_SHORT_5_5_5_1},

         // sBGRA_4444

        {dglCreateSurfaceDescriptor(4, 4, 4, 8, 4, 12, 4, 0, 0, 0, CColorDescriptor::sRGBA, 16), GL_SRGB8_ALPHA8, GL_BGRA, GL_UNSIGNED_SHORT_4_4_4_4},

         // lBGRX_8888

        {dglCreateSurfaceDescriptor(8, 8, 8, 16, 8, 24, 0, 0, 0, 0, CColorDescriptor::lRGBA, 32), GL_RGB8, GL_BGRA, GL_UNSIGNED_BYTE},

         // lBGRA_8888

        {dglCreateSurfaceDescriptor(8, 8, 8, 16, 8, 24, 8, 0, 0, 0, CColorDescriptor::lRGBA, 32), GL_RGBA8, GL_BGRA, GL_UNSIGNED_BYTE},

         // lBGRA_8888_PRE

        {dglCreateSurfaceDescriptor(8, 8, 8, 16, 8, 24, 8, 0, 0, 0, CColorDescriptor::lRGBA_PRE, 32), GL_RGBA8, GL_BGRA, GL_UNSIGNED_BYTE},

		/* {A,X}BGR channel ordering */

         // sXBGR_8888

        {dglCreateSurfaceDescriptor(8, 0, 8, 8, 8, 16, 0, 0, 0, 0, CColorDescriptor::sRGBA, 32), GL_SRGB8, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV},

         // sABGR_8888

        {dglCreateSurfaceDescriptor(8, 0, 8, 8, 8, 16, 8, 24, 0, 0, CColorDescriptor::sRGBA, 32), GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV},

         // sABGR_8888_PRE

        {dglCreateSurfaceDescriptor(8, 0, 8, 8, 8, 16, 8, 24, 0, 0, CColorDescriptor::sRGBA_PRE, 32), GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV},

         // sABGR_1555

        {dglCreateSurfaceDescriptor(5, 0, 5, 5, 5, 10, 1, 15, 0, 0, CColorDescriptor::sRGBA, 16), GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV},

         // sABGR_4444

		{dglCreateSurfaceDescriptor(4, 0, 4, 4, 4, 8, 4, 12, 0, 0, CColorDescriptor::sRGBA, 16), GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4_REV},

         // lXBGR_8888

        {dglCreateSurfaceDescriptor(8, 0, 8, 8, 8, 16, 0, 0, 0, 0, CColorDescriptor::lRGBA, 32), GL_RGB8, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV},

         // lABGR_8888

        {dglCreateSurfaceDescriptor(8, 0, 8, 8, 8, 16, 8, 24, 0, 0, CColorDescriptor::lRGBA, 32), GL_RGBA8, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV},

		 // lABGR_8888_PRE:

		{dglCreateSurfaceDescriptor(8, 0, 8, 8, 8, 16, 8, 24, 0, 0, CColorDescriptor::lRGBA_PRE, 32), GL_RGBA8, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV}};

    for (size_t i = 0; i < sizeof(map)/sizeof(map[0]); i++)

    {

        if (dglIsDescEqualToMapping(desc, map[i]))

		{

			internal_format = map[i].internal_format;

			data_format = map[i].data_format;

			data_type = map[i].data_type;

			DGLES2_ASSERT(internal_format != GL_NONE && data_format != GL_NONE && data_type != GL_NONE);

			return;

		}

    }

    DGLES2_ASSERT(GL_FALSE);

    return;

}

void deglGetImageInfo(GLeglImageOES image, GLenum* internal_format, GLsizei* width, GLsizei* height, GLsizei* stride, GLenum* data_format, GLenum* data_type)

{

	DGLES2_ASSERT(image != NULL);

	DGLES2_ASSERT(internal_format != NULL);

	DGLES2_ASSERT(width != NULL);

	DGLES2_ASSERT(height != NULL);

	DGLES2_ASSERT(stride != NULL);

	DGLES2_ASSERT(data_format != NULL);

	DGLES2_ASSERT(data_type != NULL);

	SurfaceDescriptor desc;

	EGLtoGLES2Interface::GetEGLInterface()->GetDescForImage(image, desc);

	*width = desc.m_width;

	*height = desc.m_height;

	*stride = desc.m_stride;

	dglSurfaceDescriptorToGLEnums(desc, *internal_format, *data_format, *data_type);

}

void* deglGetImageData(GLeglImageOES image)

{

	DGLES2_ASSERT(image != NULL);

	return EGLtoGLES2Interface::GetEGLInterface()->GetDataForImage(image);

}

namespace

{

EGLtoGLES2Interface g_EGLtoGLES2Interface;

}

IEGLtoGLES2Interface* getGLES2Interface(void)

{

	return &g_EGLtoGLES2Interface;

}

#include <new>

EGLtoGLES2Interface::EGLtoGLES2Interface() :

    m_egl(NULL)

{

}

void EGLtoGLES2Interface::SetEGLInterface( IGLEStoEGLInterface* egl )

{

    DGLES2_ASSERT(!m_egl);

    m_egl = egl;

}

void* EGLtoGLES2Interface::CreateContext(void* nativeContext)

{

	DGLContext* newContext = NULL;

	newContext = DGLContext_create(nativeContext);

	if(newContext == NULL)

	{

		return NULL;

    }

	m_contexts.insert(newContext);

    return newContext;

}

bool EGLtoGLES2Interface::ReleaseContext(void* context)

{

	DGLES2_ASSERT(context != NULL);

	DGLContext* ctx = static_cast<DGLContext*>(context);

	if(m_contexts.find(ctx) == m_contexts.end())

	{

		return false;

	}

	DGLContext_destroy(ctx);

	m_contexts.erase(ctx);

	return true;

}

void* EGLtoGLES2Interface::GetNativeContext(void* context)

{

	DGLES2_ASSERT(context != NULL);

	DGLContext* ctx = static_cast<DGLContext*>(context);

	if(m_contexts.find(ctx) == m_contexts.end())

	{

		return false;

	}

	return ctx->native_context;

}

extern "C"

{

GL_APICALL void GL_APIENTRY glEGLImageTargetTexture2DOES (GLenum target, GLeglImageOES image);

GL_APICALL void GL_APIENTRY glEGLImageTargetRenderbufferStorageOES (GLenum target, GLeglImageOES image);

}

fpGLProc EGLtoGLES2Interface::GetGLProcAddress(const char *procname)

{

	if(strcmp(procname, "glEGLImageTargetTexture2DOES") == 0)

	{

		return (fpGLProc)glEGLImageTargetTexture2DOES;

	}

	else if(strcmp(procname, "glEGLImageTargetRenderbufferStorageOES") == 0)

	{

		return (fpGLProc)glEGLImageTargetRenderbufferStorageOES;

	}

	else

	{

		return NULL;

	}

}

int EGLtoGLES2Interface::BindTexImage( void* surface, int level, bool generate_mipmap, const SurfaceDescriptor* desc, void* buffer )

{

	GLuint ret = 0;

	// Store the current error and clear the error flag.

	DGLContext_getHostError(ctx);

	if(level < 0)

	{

		level = 0;

	}

	else if(level > ctx->max_texture_level)

	{

		level = ctx->max_texture_level;

	}

	// Clear all mipmap levels.

	{

		int i;

		for(i = 0; i < ctx->max_texture_level; i++)

		{

			ctx->hgl.TexImage2D(GL_TEXTURE_2D, level, GL_RGBA, 0, 0, 0,

				GL_RGBA, GL_UNSIGNED_BYTE, NULL);

		}

	}

	{

		GLenum internal_format, data_format, data_type;

		dglSurfaceDescriptorToGLEnums(*desc, internal_format, data_format, data_type);

		ctx->hgl.TexImage2D(GL_TEXTURE_2D, level, internal_format, desc->m_width, desc->m_height, 0,

			data_format, data_type, buffer);

	}

	if(generate_mipmap && level == 0)

	{

		ctx->hgl.GenerateMipmapEXT(GL_TEXTURE_2D);

	}

	// Clear any possible error flag.

	if(ctx->hgl.GetError() == GL_NO_ERROR)

	{

		DGLTexture* texture;

		GLeglImageOES image;

		texture = DGLContext_findTexture(ctx, ctx->texture_binding_2d);

		DGLES2_ASSERT(texture != NULL);

		DGLTexture_setLevel(texture, GL_TEXTURE_2D, level, GL_RGBA, desc->m_width, desc->m_height);

		if(generate_mipmap && level == 0)

		{

			DGLTexture_generateMipmap(texture);

		}

		image = DGLTexture_getEGLImage(texture, GL_TEXTURE_2D);

		if(image != NULL)

		{

			// Texture is respecified. It is no longer an EGLImage sibling.

			deglUnregisterImageTarget(image, GL_TEXTURE_2D, texture->obj.name);

			DGLTexture_setEGLImage(texture, GL_TEXTURE_2D, NULL);

		}

		{

			DGLTextureLevel* level_obj = DGLTexture_getLevel(texture, GL_TEXTURE_2D, level);

			if(level_obj->bound_surface != NULL)

			{

				// Texture is respecified. Release the bound EGLSurface.

				deglReleaseTexImage(level_obj->bound_surface, texture->obj.name, level);

			}

			level_obj->bound_surface = surface;

		}

		ret = texture->obj.name;

	}

	DGLES2_LEAVE_NO_ERROR_CHECK_RET(ret);

}

bool EGLtoGLES2Interface::ReleaseTexImage( int name, int level )

{

	DGLES2_ENTER_RET(false);

	DGLContext_getHostError(ctx);

	GLuint binding;

	ctx->hgl.GetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*)&binding);

	ctx->hgl.BindTexture(GL_TEXTURE_2D, (GLuint)name);

	ctx->hgl.TexImage2D(GL_TEXTURE_2D, level, GL_RGBA, 0, 0, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);

	ctx->hgl.BindTexture(GL_TEXTURE_2D, binding);

	bool ret = false;

	if(ctx->hgl.GetError() == GL_NO_ERROR)

	{

		DGLTexture* texture;

		DGLTextureLevel* level_obj;

		texture = DGLContext_findTexture(ctx, name);

		level_obj = DGLTexture_getLevel(texture, GL_TEXTURE_2D, level);

		level_obj->bound_surface = NULL;

		ret = true;

	}

	DGLES2_LEAVE_NO_ERROR_CHECK_RET(ret);

}

static GLenum dglImageTargetToGLenum(EImageTarget target)

{

	switch(target)

	{

		case IMAGE_TARGET_TEXTURE_2D:

			return GL_TEXTURE_2D;

		case IMAGE_TARGET_TEXTURE_CUBE_MAP_POSITIVE_X:

			return GL_TEXTURE_CUBE_MAP_POSITIVE_X;

		case IMAGE_TARGET_TEXTURE_CUBE_MAP_NEGATIVE_X:

			return GL_TEXTURE_CUBE_MAP_NEGATIVE_X;

		case IMAGE_TARGET_TEXTURE_CUBE_MAP_POSITIVE_Y:

			return GL_TEXTURE_CUBE_MAP_POSITIVE_Y;

		case IMAGE_TARGET_TEXTURE_CUBE_MAP_NEGATIVE_Y:

			return GL_TEXTURE_CUBE_MAP_NEGATIVE_Y;

		case IMAGE_TARGET_TEXTURE_CUBE_MAP_POSITIVE_Z:

			return GL_TEXTURE_CUBE_MAP_POSITIVE_Z;

		case IMAGE_TARGET_TEXTURE_CUBE_MAP_NEGATIVE_Z:

			return GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;

		default:

			DGLES2_ASSERT(false);

	}