251 lines
9.6 KiB
C++
251 lines
9.6 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
|
|
*
|
|
* This library is open source and may be redistributed and/or modified under
|
|
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
|
|
* (at your option) any later version. The full license is in LICENSE file
|
|
* included with this distribution, and on the openscenegraph.org website.
|
|
*
|
|
* This library 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
|
|
* OpenSceneGraph Public License for more details.
|
|
*/
|
|
|
|
// -*-c++-*-
|
|
|
|
#ifndef OSG_IMAGE
|
|
#define OSG_IMAGE 1
|
|
|
|
#include <osg/Object>
|
|
#include <osg/GL>
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#ifndef GL_VERSION_1_2
|
|
/* 1.2 definitions...*/
|
|
#define GL_BGR 0x80E0
|
|
#define GL_BGRA 0x80E1
|
|
#define GL_UNSIGNED_BYTE_3_3_2 0x8032
|
|
#define GL_UNSIGNED_BYTE_2_3_3_REV 0x8362
|
|
#define GL_UNSIGNED_SHORT_5_6_5 0x8363
|
|
#define GL_UNSIGNED_SHORT_5_6_5_REV 0x8364
|
|
#define GL_UNSIGNED_SHORT_4_4_4_4 0x8033
|
|
#define GL_UNSIGNED_SHORT_4_4_4_4_REV 0x8365
|
|
#define GL_UNSIGNED_SHORT_5_5_5_1 0x8034
|
|
#define GL_UNSIGNED_SHORT_1_5_5_5_REV 0x8366
|
|
#define GL_UNSIGNED_INT_8_8_8_8 0x8035
|
|
#define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
|
|
#define GL_UNSIGNED_INT_10_10_10_2 0x8036
|
|
#define GL_UNSIGNED_INT_2_10_10_10_REV 0x8368
|
|
#endif
|
|
|
|
namespace osg {
|
|
|
|
/** Image class for encapsulating the storage texture image data.*/
|
|
class SG_EXPORT Image : public Object
|
|
{
|
|
|
|
public :
|
|
|
|
Image();
|
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
|
|
Image(const Image& image,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
|
|
|
|
virtual Object* cloneType() const { return new Image(); }
|
|
virtual Object* clone(const CopyOp& copyop) const { return new Image(*this,copyop); }
|
|
virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const Image*>(obj)!=0; }
|
|
virtual const char* libraryName() const { return "osg"; }
|
|
virtual const char* className() const { return "Image"; }
|
|
|
|
|
|
void setFileName(const std::string& fileName);
|
|
inline const std::string& getFileName() const { return _fileName; }
|
|
|
|
|
|
/* allocated a pixel block of specified size and type.*/
|
|
void allocateImage(int s,int t,int r,
|
|
GLenum format,GLenum type,
|
|
int packing=1);
|
|
|
|
|
|
/** set the image data and format.
|
|
* note, when the packing value is negative (the default is -1) this method assumes
|
|
* a _packing width of 1 if the width is not a multiple of 4,
|
|
* otherwise automatically sets to _packing to 4. If a positive
|
|
* value of packing is supplied than _packing is simply set to that value.
|
|
*/
|
|
void setImage(int s,int t,int r,
|
|
GLint internalTextureformat,
|
|
GLenum format,GLenum type,
|
|
unsigned char *data,
|
|
int packing=1);
|
|
|
|
/** readPixels from screen at specified position and size, using glReadPixels.
|
|
* Create memory for storage if required, reuse existing pixel coords if possible.
|
|
* if pixelFormat or dataType*/
|
|
void readPixels(int x,int y,int width,int height,
|
|
GLenum format,GLenum type);
|
|
|
|
|
|
/** Scale image to specified size. */
|
|
void scaleImage(int s,int t,int r);
|
|
|
|
/** Copy a source Image into a subpart of this Image at specified position.
|
|
* Typically used to copy to an already allocated image, such as creating
|
|
* a 3D image from a stack 2D images.
|
|
* If the this Image is empty then image data is created to
|
|
* accomodate the imaging image in its offset position.
|
|
* If source is NULL then no operation happens, this Image is left unchanged.*/
|
|
void copySubImage(int s_offset,int t_offset,int r_offset,osg::Image* source);
|
|
|
|
|
|
/** Width of image.*/
|
|
inline int s() const { return _s; }
|
|
|
|
/** Height of image.*/
|
|
inline int t() const { return _t; }
|
|
|
|
/** Depth of image.*/
|
|
inline int r() const { return _r; }
|
|
|
|
void setInternalTextureFormat(GLint internalFormat);
|
|
inline GLint getInternalTextureFormat() const { return _internalTextureFormat; }
|
|
|
|
void setPixelFormat(GLenum format);
|
|
inline GLenum getPixelFormat() const { return _pixelFormat; }
|
|
|
|
inline GLenum getDataType() const { return _dataType; }
|
|
|
|
inline unsigned int getPacking() const { return _packing; }
|
|
|
|
/** return the numbers of bits required for each pixel.*/
|
|
inline unsigned int getPixelSizeInBits() const { return computePixelSizeInBits(_pixelFormat,_dataType); }
|
|
|
|
/** return the numbers of bytes each row of pixels occupies once it has been packed.*/
|
|
inline unsigned int getRowSizeInBytes() const { return computeRowWidthInBytes(_s,_pixelFormat,_dataType,_packing); }
|
|
|
|
/** return the numbers of bytes each image (_s*_t) of pixels occupies..*/
|
|
inline unsigned int getImageSizeInBytes() const { return getRowSizeInBytes()*_t; }
|
|
|
|
/** return the numbers of bytes the whole row/image/volume of pixels occupies.*/
|
|
inline unsigned int getTotalSizeInBytes() const { return getImageSizeInBytes()*_r; }
|
|
|
|
/** raw image data.*/
|
|
inline unsigned char *data() { return _data; }
|
|
|
|
/** raw const image data.*/
|
|
inline const unsigned char *data() const { return _data; }
|
|
|
|
|
|
inline unsigned char* data(int column, int row=0,int image=0)
|
|
{
|
|
if (!_data) return NULL;
|
|
return _data+(column*getPixelSizeInBits())/8+row*getRowSizeInBytes()+image*getImageSizeInBytes();
|
|
}
|
|
|
|
inline unsigned char* data(int column, int row=0,int image=0) const
|
|
{
|
|
if (!_data) return NULL;
|
|
return _data+(column*getPixelSizeInBits())/8+row*getRowSizeInBytes()+image*getImageSizeInBytes();
|
|
}
|
|
|
|
/** Flip the image horizontally.*/
|
|
void flipHorizontal(int image=0);
|
|
|
|
/** Flip the image vertically.*/
|
|
void flipVertical(int image=0);
|
|
|
|
|
|
/** Ensure image dimensions are a power of two.
|
|
* Mip Mapped texture require the image dimensions to be
|
|
* power of two and are within the maxiumum texture size for
|
|
* the host machine.*/
|
|
void ensureValidSizeForTexturing(GLint maxTextureSize);
|
|
|
|
/** Dirty the image, which increments the modified flag, to force osg::Texture to reload the image.*/
|
|
inline void dirty() { ++_modifiedTag; }
|
|
|
|
/** Set the modified tag value, only used by osg::Texture when using texture subloading. */
|
|
inline void setModifiedTag(unsigned int value) { _modifiedTag=value; }
|
|
|
|
/** Get modified tag value, only used by osg::Texture when using texture subloading. */
|
|
inline unsigned int getModifiedTag() const { return _modifiedTag; }
|
|
|
|
|
|
static bool isPackedType(GLenum type);
|
|
static unsigned int computeNumComponents(GLenum format);
|
|
static unsigned int computePixelSizeInBits(GLenum format,GLenum type);
|
|
static unsigned int computeRowWidthInBytes(int width,GLenum format,GLenum type,int packing);
|
|
static unsigned int computeNearestPowerOfTwo(unsigned int s,float bias=0.5f);
|
|
|
|
// precomputed mipmaps stuff;
|
|
typedef std::vector< unsigned int > MipmapDataType;
|
|
|
|
inline bool isMipmap() const {return !_mipmapData.empty();};
|
|
|
|
unsigned int getNumMipmapLevels() const
|
|
{
|
|
return _mipmapData.size()+1;
|
|
};
|
|
|
|
// send offsets into data
|
|
// It is assumed that first mipmap offset (index 0) is 0
|
|
inline void setMipmapData(const MipmapDataType& mipmapDataVector)
|
|
{
|
|
_mipmapData = mipmapDataVector;
|
|
};
|
|
|
|
inline unsigned char* getMipmapData(unsigned int mipmapNumber) const
|
|
{
|
|
if(mipmapNumber == 0)
|
|
return _data;
|
|
else if(mipmapNumber < getNumMipmapLevels())
|
|
return _data + _mipmapData[mipmapNumber-1];
|
|
return 0L;
|
|
};
|
|
|
|
|
|
/** converts a single image into mip mapped version image.*/
|
|
void computeMipMaps();
|
|
|
|
/** return true of this image is translucent - i.e. it has alpha values that are less 1.0 (when normalized).*/
|
|
bool isImageTranslucent() const;
|
|
|
|
protected :
|
|
|
|
virtual ~Image();
|
|
|
|
Image& operator = (const Image&) { return *this; }
|
|
|
|
std::string _fileName;
|
|
int _s, _t, _r;
|
|
GLint _internalTextureFormat;
|
|
GLenum _pixelFormat;
|
|
GLenum _dataType;
|
|
unsigned int _packing;
|
|
unsigned char *_data;
|
|
|
|
unsigned int _modifiedTag;
|
|
|
|
MipmapDataType _mipmapData;
|
|
};
|
|
|
|
class Geode;
|
|
|
|
/** Convenience function to be used by images loaders to generate a valid geode
|
|
* to return for readNode().
|
|
* Use the images s and t values scale the dimensions of the image.
|
|
*/
|
|
extern SG_EXPORT Geode* createGeodeForImage(Image* image);
|
|
/** Convenience function to be used by images loaders to generate a valid geode
|
|
* to return for readNode().
|
|
* Use the specified s and t values scale the dimensions of the image.
|
|
*/
|
|
extern SG_EXPORT Geode* createGeodeForImage(Image* image,float s,float t);
|
|
|
|
}
|
|
|
|
#endif // __SG_IMAGE_H
|