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godot/core/image.h

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/*************************************************************************/
/* image.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 THE AUTHORS OR COPYRIGHT HOLDERS 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. */
/*************************************************************************/
#ifndef IMAGE_H
#define IMAGE_H
#include "dvector.h"
#include "color.h"
#include "math_2d.h"
/**
* @author Juan Linietsky <reduzio@gmail.com>
*
* Image storage class. This is used to store an image in user memory, as well as
* providing some basic methods for image manipulation.
* Images can be loaded from a file, or registered into the Render object as textures.
*/
class Image;
typedef Error (*SavePNGFunc)(const String &p_path, Image& p_img);
class Image {
enum {
MAX_WIDTH=16384, // force a limit somehow
MAX_HEIGHT=16384// force a limit somehow
};
public:
static SavePNGFunc save_png_func;
enum Format {
FORMAT_L8, //luminance
FORMAT_LA8, //luminance-alpha
FORMAT_R8,
FORMAT_RG8,
FORMAT_RGB8,
FORMAT_RGBA8,
FORMAT_RGB565, //16 bit
FORMAT_RGBA4444,
FORMAT_RGBA5551,
FORMAT_RF, //float
FORMAT_RGF,
FORMAT_RGBF,
FORMAT_RGBAF,
FORMAT_RH, //half float
FORMAT_RGH,
FORMAT_RGBH,
FORMAT_RGBAH,
FORMAT_DXT1, //s3tc bc1
FORMAT_DXT3, //bc2
FORMAT_DXT5, //bc3
FORMAT_ATI1, //bc4
FORMAT_ATI2, //bc5
FORMAT_BPTC_RGBA, //btpc bc6h
FORMAT_BPTC_RGBF, //float /
FORMAT_BPTC_RGBFU, //unsigned float
FORMAT_PVRTC2, //pvrtc
FORMAT_PVRTC2A,
FORMAT_PVRTC4,
FORMAT_PVRTC4A,
FORMAT_ETC, //etc1
FORMAT_ETC2_R11, //etc2
FORMAT_ETC2_R11S, //signed, NOT srgb.
FORMAT_ETC2_RG11,
FORMAT_ETC2_RG11S,
FORMAT_ETC2_RGB8,
FORMAT_ETC2_RGBA8,
FORMAT_ETC2_RGB8A1,
FORMAT_MAX
};
static const char* format_names[FORMAT_MAX];
enum Interpolation {
INTERPOLATE_NEAREST,
INTERPOLATE_BILINEAR,
INTERPOLATE_CUBIC,
/* INTERPOLATE GAUSS */
};
//some functions provided by something else
static Image (*_png_mem_loader_func)(const uint8_t* p_png,int p_size);
static Image (*_jpg_mem_loader_func)(const uint8_t* p_png,int p_size);
static void (*_image_compress_bc_func)(Image *);
static void (*_image_compress_pvrtc2_func)(Image *);
static void (*_image_compress_pvrtc4_func)(Image *);
static void (*_image_compress_etc_func)(Image *);
static void (*_image_compress_etc2_func)(Image *);
static void (*_image_decompress_pvrtc)(Image *);
static void (*_image_decompress_bc)(Image *);
static void (*_image_decompress_etc)(Image *);
static void (*_image_decompress_etc2)(Image *);
Error _decompress_bc();
static PoolVector<uint8_t> (*lossy_packer)(const Image& p_image,float p_quality);
static Image (*lossy_unpacker)(const PoolVector<uint8_t>& p_buffer);
static PoolVector<uint8_t> (*lossless_packer)(const Image& p_image);
static Image (*lossless_unpacker)(const PoolVector<uint8_t>& p_buffer);
private:
Format format;
PoolVector<uint8_t> data;
int width,height;
bool mipmaps;
_FORCE_INLINE_ void _get_mipmap_offset_and_size(int p_mipmap,int &r_offset, int &r_width, int &r_height) const; //get where the mipmap begins in data
static int _get_dst_image_size(int p_width, int p_height, Format p_format,int &r_mipmaps,int p_mipmaps=-1);
bool _can_modify(Format p_format) const;
_FORCE_INLINE_ void _put_pixelb(int p_x,int p_y, uint32_t p_pixelsize,uint8_t *p_dst,const uint8_t *p_src);
_FORCE_INLINE_ void _get_pixelb(int p_x,int p_y, uint32_t p_pixelsize,const uint8_t *p_src,uint8_t *p_dst);
public:
int get_width() const; ///< Get image width
int get_height() const; ///< Get image height
bool has_mipmaps() const;
int get_mipmap_count() const;
/**
* Convert the image to another format, conversion only to raw byte format
*/
void convert( Format p_new_format );
Image converted(int p_new_format) {
ERR_FAIL_INDEX_V(p_new_format, FORMAT_MAX, Image());
Image ret = *this;
ret.convert((Format)p_new_format);
return ret;
};
/**
* Get the current image format.
*/
Format get_format() const;
int get_mipmap_offset(int p_mipmap) const; //get where the mipmap begins in data
void get_mipmap_offset_and_size(int p_mipmap,int &r_ofs, int &r_size) const; //get where the mipmap begins in data
void get_mipmap_offset_size_and_dimensions(int p_mipmap,int &r_ofs, int &r_size,int &w, int& h) const; //get where the mipmap begins in data
/**
* Resize the image, using the prefered interpolation method.
* Indexed-Color images always use INTERPOLATE_NEAREST.
*/
void resize_to_po2(bool p_square=false);
void resize( int p_width, int p_height, Interpolation p_interpolation=INTERPOLATE_BILINEAR );
Image resized( int p_width, int p_height, int p_interpolation=INTERPOLATE_BILINEAR );
void shrink_x2();
void expand_x2_hq2x();
/**
* Crop the image to a specific size, if larger, then the image is filled by black
*/
void crop( int p_width, int p_height );
void flip_x();
void flip_y();
/**
* Generate a mipmap to an image (creates an image 1/4 the size, with averaging of 4->1)
*/
Error generate_mipmaps(bool p_keep_existing=false);
void clear_mipmaps();
/**
* Create a new image of a given size and format. Current image will be lost
*/
void create(int p_width, int p_height, bool p_use_mipmaps, Format p_format);
void create(int p_width, int p_height, bool p_use_mipmaps, Format p_format, const PoolVector<uint8_t>& p_data);
void create( const char ** p_xpm );
/**
* returns true when the image is empty (0,0) in size
*/
bool empty() const;
PoolVector<uint8_t> get_data() const;
Error load(const String& p_path);
Error save_png(const String& p_path);
/**
* create an empty image
*/
Image();
/**
* create an empty image of a specific size and format
*/
Image(int p_width, int p_height, bool p_use_mipmaps, Format p_format);
/**
* import an image of a specific size and format from a pointer
*/
Image(int p_width, int p_height, bool p_mipmaps, Format p_format, const PoolVector<uint8_t>& p_data);
enum AlphaMode {
ALPHA_NONE,
ALPHA_BIT,
ALPHA_BLEND
};
AlphaMode detect_alpha() const;
bool is_invisible() const;
static int get_format_pixel_size(Format p_format);
static int get_format_pixel_rshift(Format p_format);
static void get_format_min_pixel_size(Format p_format,int &r_w, int &r_h);
static int get_image_data_size(int p_width, int p_height, Format p_format,int p_mipmaps=0);
static int get_image_required_mipmaps(int p_width, int p_height, Format p_format);
bool operator==(const Image& p_image) const;
enum CompressMode {
COMPRESS_16BIT,
COMPRESS_S3TC,
COMPRESS_PVRTC2,
COMPRESS_PVRTC4,
COMPRESS_ETC,
COMPRESS_ETC2
};
Error compress(CompressMode p_mode=COMPRESS_S3TC);
Image compressed(int p_mode); /* from the Image::CompressMode enum */
Error decompress();
Image decompressed() const;
bool is_compressed() const;
void fix_alpha_edges();
void premultiply_alpha();
void srgb_to_linear();
void normalmap_to_xy();
void blit_rect(const Image& p_src, const Rect2& p_src_rect,const Point2& p_dest);
Rect2 get_used_rect() const;
Image get_rect(const Rect2& p_area) const;
static void set_compress_bc_func(void (*p_compress_func)(Image *));
static String get_format_name(Format p_format);
Image(const uint8_t* p_mem_png_jpg, int p_len=-1);
Image(const char **p_xpm);
~Image();
};
#endif
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