mirror/godot
2
0
Fork 0
mirror of https://github.com/godotengine/godot.git synced 2024-11-27 09:16:35 +08:00
Code Issues Packages Projects Releases Wiki Activity
e21702f764
godot/core/image.h
Juan Linietsky 3e8eb396d7 Finalized DynamicFont implementation 
-DynamicFont uses Freetype by default
-Editor fonts are now scalable thanks to this
-Cleaned up documentation browser and added fonts for this
2016-05-29 11:37:52 -03:00

369 lines
12 KiB
C++
Raw Blame History

/*************************************************************************/
/* image.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 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_GRAYSCALE, ///< one byte per pixel, 0-255
FORMAT_INTENSITY, ///< one byte per pixel, 0-255
FORMAT_GRAYSCALE_ALPHA, ///< two bytes per pixel, 0-255. alpha 0-255
FORMAT_RGB, ///< one byte R, one byte G, one byte B
FORMAT_RGBA, ///< one byte R, one byte G, one byte B, one byte A
FORMAT_INDEXED, ///< index byte 0-256, and after image end, 256*3 bytes of palette
FORMAT_INDEXED_ALPHA, ///< index byte 0-256, and after image end, 256*4 bytes of palette (alpha)
FORMAT_YUV_422,
FORMAT_YUV_444,
FORMAT_BC1, // DXT1
FORMAT_BC2, // DXT3
FORMAT_BC3, // DXT5
FORMAT_BC4, // ATI1
FORMAT_BC5, // ATI2
FORMAT_PVRTC2,
FORMAT_PVRTC2_ALPHA,
FORMAT_PVRTC4,
FORMAT_PVRTC4_ALPHA,
FORMAT_ETC, // regular ETC, no transparency
FORMAT_ATC,
FORMAT_ATC_ALPHA_EXPLICIT,
FORMAT_ATC_ALPHA_INTERPOLATED,
/*FORMAT_ETC2_R, for the future..
FORMAT_ETC2_RG,
FORMAT_ETC2_RGB,
FORMAT_ETC2_RGBA1,
FORMAT_ETC2_RGBA,*/
FORMAT_CUSTOM,
FORMAT_MAX
};
static const char* format_names[FORMAT_MAX];
enum Interpolation {
INTERPOLATE_NEAREST,
INTERPOLATE_BILINEAR,
INTERPOLATE_CUBIC,
/* INTERPOLATE GAUSS */
};
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_decompress_pvrtc)(Image *);
static void (*_image_decompress_bc)(Image *);
static void (*_image_decompress_etc)(Image *);
Error _decompress_bc();
static DVector<uint8_t> (*lossy_packer)(const Image& p_image,float p_quality);
static Image (*lossy_unpacker)(const DVector<uint8_t>& p_buffer);
static DVector<uint8_t> (*lossless_packer)(const Image& p_image);
static Image (*lossless_unpacker)(const DVector<uint8_t>& p_buffer);
private:
//internal byte based color
struct BColor {
union {
uint8_t col[4];
struct {
uint8_t r,g,b,a;
};
};
bool operator==(const BColor& p_color) const { for(int i=0;i<4;i++) {if (col[i]!=p_color.col[i]) return false; } return true; }
_FORCE_INLINE_ uint8_t gray() const { return (uint16_t(col[0])+uint16_t(col[1])+uint16_t(col[2]))/3; }
_FORCE_INLINE_ BColor() {}
BColor(uint8_t p_r,uint8_t p_g,uint8_t p_b,uint8_t p_a=255) { col[0]=p_r; col[1]=p_g; col[2]=p_b; col[3]=p_a; }
};
//median cut classes
struct BColorPos {
uint32_t index;
BColor color;
struct SortR {
bool operator()(const BColorPos& ca, const BColorPos& cb) const { return ca.color.r < cb.color.r; }
};
struct SortG {
bool operator()(const BColorPos& ca, const BColorPos& cb) const { return ca.color.g < cb.color.g; }
};
struct SortB {
bool operator()(const BColorPos& ca, const BColorPos& cb) const { return ca.color.b < cb.color.b; }
};
struct SortA {
bool operator()(const BColorPos& ca, const BColorPos& cb) const { return ca.color.a < cb.color.a; }
};
};
struct SPTree {
bool leaf;
uint8_t split_plane;
uint8_t split_value;
union {
int left;
int color;
};
int right;
SPTree() { leaf=true; left=-1; right=-1;}
};
struct MCBlock {
BColorPos min_color,max_color;
BColorPos *colors;
int sp_idx;
int color_count;
int get_longest_axis_index() const;
int get_longest_axis_length() const;
bool operator<(const MCBlock& p_block) const;
void shrink();
MCBlock();
MCBlock(BColorPos *p_colors,int p_color_count);
};
Format format;
DVector<uint8_t> data;
int width,height,mipmaps;
_FORCE_INLINE_ BColor _get_pixel(int p_x,int p_y,const unsigned char *p_data,int p_data_size) const;
_FORCE_INLINE_ BColor _get_pixelw(int p_x,int p_y,int p_width,const unsigned char *p_data,int p_data_size) const;
_FORCE_INLINE_ void _put_pixelw(int p_x,int p_y, int p_width, const BColor& p_color, unsigned char *p_data);
_FORCE_INLINE_ void _put_pixel(int p_x,int p_y, const BColor& p_color, unsigned char *p_data);
_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
_FORCE_INLINE_ static void _get_format_min_data_size(Format p_format,int &r_w, int &r_h);
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;
public:
int get_width() const; ///< Get image width
int get_height() const; ///< Get image height
int get_mipmaps() const;
/**
* Get a pixel from the image. for grayscale or indexed formats, use Color::gray to obtain the actual
* value.
*/
Color get_pixel(int p_x,int p_y,int p_mipmap=0) const;
/**
* Set a pixel into the image. for grayscale or indexed formats, a suitable Color constructor.
*/
void put_pixel(int p_x,int p_y, const Color& p_color,int p_mipmap=0); /* alpha and index are averaged */
/**
* Convert the image to another format, as close as it can be done.
*/
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(int p_amount=-1,bool p_keep_existing=false);
void clear_mipmaps();
/**
* Generate a normal map from a grayscale image
*/
void make_normalmap(float p_height_scale=1.0);
/**
* 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, int p_mipmaps, Format p_format, const DVector<uint8_t>& p_data);
void create( const char ** p_xpm );
/**
* returns true when the image is empty (0,0) in size
*/
bool empty() const;
DVector<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, int p_mipmaps, Format p_format, const DVector<uint8_t>& p_data);
enum AlphaMode {
ALPHA_NONE,
ALPHA_BIT,
ALPHA_BLEND
};
AlphaMode detect_alpha() const;
bool is_invisible() const;
void put_indexed_pixel(int p_x, int p_y, uint8_t p_idx,int p_mipmap=0);
uint8_t get_indexed_pixel(int p_x, int p_y,int p_mipmap=0) const;
void set_pallete(const DVector<uint8_t>& p_data);
static int get_format_pixel_size(Format p_format);
static int get_format_pixel_rshift(Format p_format);
static int get_format_pallete_size(Format p_format);
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;
void quantize();
enum CompressMode {
COMPRESS_BC,
COMPRESS_PVRTC2,
COMPRESS_PVRTC4,
COMPRESS_ETC
};
Error compress(CompressMode p_mode=COMPRESS_BC);
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);
void brush_transfer(const Image& p_src, const Image& p_brush, const Point2& p_dest);
Image brushed(const Image& p_src, const Image& p_brush, const Point2& p_dest) const;
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
Reference in New Issue View Git Blame Copy Permalink