irrlicht/source/Irrlicht/COpenGLTexture.h

193 lines
4.7 KiB
C++

// Copyright (C) 2002-2009 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#ifndef __C_OPEN_GL_TEXTURE_H_INCLUDED__
#define __C_OPEN_GL_TEXTURE_H_INCLUDED__
#include "ITexture.h"
#include "IImage.h"
#include "IrrCompileConfig.h"
#ifdef _IRR_COMPILE_WITH_OPENGL_
#ifdef _IRR_WINDOWS_API_
// include windows headers for HWND
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <GL/gl.h>
#include "glext.h"
#ifdef _MSC_VER
#pragma comment(lib, "OpenGL32.lib")
#pragma comment(lib, "GLu32.lib")
#endif
#else
#if defined(_IRR_OPENGL_USE_EXTPOINTER_)
#define GL_GLEXT_LEGACY 1
#endif
#if defined(_IRR_USE_OSX_DEVICE_)
#include <OpenGL/gl.h>
#else
#include <GL/gl.h>
#endif
#if defined(_IRR_OPENGL_USE_EXTPOINTER_)
#include "glext.h"
#endif
#endif
namespace irr
{
namespace video
{
class COpenGLDriver;
//! OpenGL texture.
class COpenGLTexture : public ITexture
{
public:
//! constructor
COpenGLTexture(IImage* surface, const core::string<c16>& name, COpenGLDriver* driver=0);
//! destructor
virtual ~COpenGLTexture();
//! lock function
virtual void* lock(bool readOnly = false);
//! unlock function
virtual void unlock();
//! Returns original size of the texture (image).
virtual const core::dimension2d<u32>& getOriginalSize() const;
//! Returns size of the texture.
virtual const core::dimension2d<u32>& getSize() const;
//! returns driver type of texture (=the driver, that created it)
virtual E_DRIVER_TYPE getDriverType() const;
//! returns color format of texture
virtual ECOLOR_FORMAT getColorFormat() const;
//! returns pitch of texture (in bytes)
virtual u32 getPitch() const;
//! return open gl texture name
GLuint getOpenGLTextureName() const;
//! return whether this texture has mipmaps
virtual bool hasMipMaps() const;
//! Regenerates the mip map levels of the texture. Useful after
//! locking and modifying the texture
virtual void regenerateMipMapLevels();
//! Is it a render target?
virtual bool isRenderTarget() const;
//! Is it a FrameBufferObject?
virtual bool isFrameBufferObject() const;
//! Bind RenderTargetTexture
virtual void bindRTT();
//! Unbind RenderTargetTexture
virtual void unbindRTT();
//! sets whether this texture is intended to be used as a render target.
void setIsRenderTarget(bool isTarget);
protected:
//! protected constructor with basic setup, no GL texture name created, for derived classes
COpenGLTexture(const core::string<c16>& name, COpenGLDriver* driver);
//! get the desired color format based on texture creation flags and the input format.
ECOLOR_FORMAT getBestColorFormat(ECOLOR_FORMAT format);
//! convert the image into an internal image with better properties for this driver.
void getImageData(IImage* image);
//! copies the texture into an OpenGL texture.
//! \param: newTexture is true if method is called from a newly created texture for the first time. Otherwise call with false to improve memory handling.
void copyTexture(bool newTexture=true);
core::dimension2d<u32> ImageSize;
core::dimension2d<u32> TextureSize;
ECOLOR_FORMAT ColorFormat;
s32 Pitch;
COpenGLDriver* Driver;
IImage* Image;
GLuint TextureName;
GLint InternalFormat;
GLenum PixelFormat;
GLenum PixelType;
bool HasMipMaps;
bool IsRenderTarget;
bool AutomaticMipmapUpdate;
bool ReadOnlyLock;
bool KeepImage;
};
//! OpenGL FBO texture.
class COpenGLFBOTexture : public COpenGLTexture
{
public:
//! FrameBufferObject constructor
COpenGLFBOTexture(const core::dimension2d<u32>& size, const core::string<c16>& name, COpenGLDriver* driver=0);
//! destructor
virtual ~COpenGLFBOTexture();
//! Is it a FrameBufferObject?
virtual bool isFrameBufferObject() const;
//! Bind RenderTargetTexture
virtual void bindRTT();
//! Unbind RenderTargetTexture
virtual void unbindRTT();
ITexture* DepthTexture;
protected:
GLuint ColorFrameBuffer;
};
//! OpenGL FBO depth texture.
class COpenGLFBODepthTexture : public COpenGLFBOTexture
{
public:
//! FrameBufferObject depth constructor
COpenGLFBODepthTexture(const core::dimension2d<u32>& size, const core::string<c16>& name, COpenGLDriver* driver=0, bool useStencil=false);
//! destructor
virtual ~COpenGLFBODepthTexture();
//! Bind RenderTargetTexture
virtual void bindRTT();
//! Unbind RenderTargetTexture
virtual void unbindRTT();
bool attach(ITexture*);
protected:
GLuint DepthRenderBuffer;
GLuint StencilRenderBuffer;
bool UseStencil;
};
} // end namespace video
} // end namespace irr
#endif
#endif // _IRR_COMPILE_WITH_OPENGL_