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godot/core/image.h
Theogen Ratkin 8f6a6ac8d0 Add interpolation parameter to resize_to_po2() 
Image::resize_to_po2() now takes an optional p_interpolation parameter
that it passes directly to resize() with default value INTERPOLATE_BILINEAR.

GLES2: call resize_to_po2() with interpolate argument

Call resize_to_po2() in GLES2 rasterizer storage with either
INTERPOLATE_BILINEAR or INTERPOLATE_NEAREST depending on TEXTURE_FLAG_FILTER.

This avoids filtering issues with non power of two pixel art textures.
See #44379
2020-12-18 14:02:38 -04:00

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/*************************************************************************/
/* image.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* 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 "core/color.h"
#include "core/math/rect2.h"
#include "core/pool_vector.h"
#include "core/resource.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, const Ref<Image> &p_img);
typedef PoolVector<uint8_t> (*SavePNGBufferFunc)(const Ref<Image> &p_img);
typedef Ref<Image> (*ImageMemLoadFunc)(const uint8_t *p_png, int p_size);
typedef Error (*SaveEXRFunc)(const String &p_path, const Ref<Image> &p_img, bool p_grayscale);
class Image : public Resource {
GDCLASS(Image, Resource);
public:
static SavePNGFunc save_png_func;
static SaveEXRFunc save_exr_func;
static SavePNGBufferFunc save_png_buffer_func;
enum {
MAX_WIDTH = 16384, // force a limit somehow
MAX_HEIGHT = 16384 // force a limit somehow
};
enum Format {
FORMAT_L8, //luminance
FORMAT_LA8, //luminance-alpha
FORMAT_R8,
FORMAT_RG8,
FORMAT_RGB8,
FORMAT_RGBA8,
FORMAT_RGBA4444,
FORMAT_RGBA5551,
FORMAT_RF, //float
FORMAT_RGF,
FORMAT_RGBF,
FORMAT_RGBAF,
FORMAT_RH, //half float
FORMAT_RGH,
FORMAT_RGBH,
FORMAT_RGBAH,
FORMAT_RGBE9995,
FORMAT_DXT1, //s3tc bc1
FORMAT_DXT3, //bc2
FORMAT_DXT5, //bc3
FORMAT_RGTC_R,
FORMAT_RGTC_RG,
FORMAT_BPTC_RGBA, //btpc bc7
FORMAT_BPTC_RGBF, //float bc6h
FORMAT_BPTC_RGBFU, //unsigned float bc6hu
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_TRILINEAR,
INTERPOLATE_LANCZOS,
/* INTERPOLATE_TRICUBIC, */
/* INTERPOLATE GAUSS */
};
enum CompressSource {
COMPRESS_SOURCE_GENERIC,
COMPRESS_SOURCE_SRGB,
COMPRESS_SOURCE_NORMAL,
COMPRESS_SOURCE_LAYERED,
};
//some functions provided by something else
static ImageMemLoadFunc _png_mem_loader_func;
static ImageMemLoadFunc _jpg_mem_loader_func;
static ImageMemLoadFunc _webp_mem_loader_func;
static ImageMemLoadFunc _tga_mem_loader_func;
static ImageMemLoadFunc _bmp_mem_loader_func;
static void (*_image_compress_bc_func)(Image *, float, CompressSource p_source);
static void (*_image_compress_bptc_func)(Image *, float p_lossy_quality, CompressSource p_source);
static void (*_image_compress_pvrtc2_func)(Image *);
static void (*_image_compress_pvrtc4_func)(Image *);
static void (*_image_compress_etc1_func)(Image *, float);
static void (*_image_compress_etc2_func)(Image *, float, CompressSource p_source);
static void (*_image_decompress_pvrtc)(Image *);
static void (*_image_decompress_bc)(Image *);
static void (*_image_decompress_bptc)(Image *);
static void (*_image_decompress_etc1)(Image *);
static void (*_image_decompress_etc2)(Image *);
static PoolVector<uint8_t> (*lossy_packer)(const Ref<Image> &p_image, float p_quality);
static Ref<Image> (*lossy_unpacker)(const PoolVector<uint8_t> &p_buffer);
static PoolVector<uint8_t> (*lossless_packer)(const Ref<Image> &p_image);
static Ref<Image> (*lossless_unpacker)(const PoolVector<uint8_t> &p_buffer);
PoolVector<uint8_t>::Write write_lock;
protected:
static void _bind_methods();
private:
void _create_empty(int p_width, int p_height, bool p_use_mipmaps, Format p_format) {
create(p_width, p_height, p_use_mipmaps, p_format);
}
void _create_from_data(int p_width, int p_height, bool p_use_mipmaps, Format p_format, const PoolVector<uint8_t> &p_data) {
create(p_width, p_height, p_use_mipmaps, p_format, p_data);
}
Format format;
PoolVector<uint8_t> data;
int width, height;
bool mipmaps;
void _copy_internals_from(const Image &p_image) {
format = p_image.format;
width = p_image.width;
height = p_image.height;
mipmaps = p_image.mipmaps;
data = p_image.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
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_data, const uint8_t *p_pixel);
_FORCE_INLINE_ void _get_pixelb(int p_x, int p_y, uint32_t p_pixelsize, const uint8_t *p_data, uint8_t *p_pixel);
void _set_data(const Dictionary &p_data);
Dictionary _get_data() const;
Error _load_from_buffer(const PoolVector<uint8_t> &p_array, ImageMemLoadFunc p_loader);
static void average_4_uint8(uint8_t &p_out, const uint8_t &p_a, const uint8_t &p_b, const uint8_t &p_c, const uint8_t &p_d);
static void average_4_float(float &p_out, const float &p_a, const float &p_b, const float &p_c, const float &p_d);
static void average_4_half(uint16_t &p_out, const uint16_t &p_a, const uint16_t &p_b, const uint16_t &p_c, const uint16_t &p_d);
static void average_4_rgbe9995(uint32_t &p_out, const uint32_t &p_a, const uint32_t &p_b, const uint32_t &p_c, const uint32_t &p_d);
static void renormalize_uint8(uint8_t *p_rgb);
static void renormalize_float(float *p_rgb);
static void renormalize_half(uint16_t *p_rgb);
static void renormalize_rgbe9995(uint32_t *p_rgb);
public:
int get_width() const; ///< Get image width
int get_height() const; ///< Get image height
Vector2 get_size() const;
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);
/**
* 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 preferred interpolation method.
*/
void resize_to_po2(bool p_square = false, Interpolation p_interpolation = INTERPOLATE_BILINEAR);
void resize(int p_width, int p_height, Interpolation p_interpolation = INTERPOLATE_BILINEAR);
void shrink_x2();
void expand_x2_hq2x();
bool is_size_po2() const;
/**
* Crop the image to a specific size, if larger, then the image is filled by black
*/
void crop_from_point(int p_x, int p_y, int p_width, int p_height);
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_renormalize = false);
void clear_mipmaps();
void normalize(); //for normal maps
/**
* 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) const;
PoolVector<uint8_t> save_png_to_buffer() const;
Error save_exr(const String &p_path, bool p_grayscale) const;
/**
* 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 int get_format_block_size(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, bool p_mipmaps = false);
static int get_image_required_mipmaps(int p_width, int p_height, Format p_format);
static int get_image_mipmap_offset(int p_width, int p_height, Format p_format, int p_mipmap);
enum CompressMode {
COMPRESS_S3TC,
COMPRESS_PVRTC2,
COMPRESS_PVRTC4,
COMPRESS_ETC,
COMPRESS_ETC2,
COMPRESS_BPTC
};
Error compress(CompressMode p_mode = COMPRESS_S3TC, CompressSource p_source = COMPRESS_SOURCE_GENERIC, float p_lossy_quality = 0.7);
Error decompress();
bool is_compressed() const;
void fix_alpha_edges();
void premultiply_alpha();
void srgb_to_linear();
void normalmap_to_xy();
Ref<Image> rgbe_to_srgb();
void bumpmap_to_normalmap(float bump_scale = 1.0);
void blit_rect(const Ref<Image> &p_src, const Rect2 &p_src_rect, const Point2 &p_dest);
void blit_rect_mask(const Ref<Image> &p_src, const Ref<Image> &p_mask, const Rect2 &p_src_rect, const Point2 &p_dest);
void blend_rect(const Ref<Image> &p_src, const Rect2 &p_src_rect, const Point2 &p_dest);
void blend_rect_mask(const Ref<Image> &p_src, const Ref<Image> &p_mask, const Rect2 &p_src_rect, const Point2 &p_dest);
void fill(const Color &c);
Rect2 get_used_rect() const;
Ref<Image> get_rect(const Rect2 &p_area) const;
static void set_compress_bc_func(void (*p_compress_func)(Image *, float, CompressSource));
static void set_compress_bptc_func(void (*p_compress_func)(Image *, float, CompressSource));
static String get_format_name(Format p_format);
Error load_png_from_buffer(const PoolVector<uint8_t> &p_array);
Error load_jpg_from_buffer(const PoolVector<uint8_t> &p_array);
Error load_webp_from_buffer(const PoolVector<uint8_t> &p_array);
Error load_tga_from_buffer(const PoolVector<uint8_t> &p_array);
Error load_bmp_from_buffer(const PoolVector<uint8_t> &p_array);
Image(const uint8_t *p_mem_png_jpg, int p_len = -1);
Image(const char **p_xpm);
virtual Ref<Resource> duplicate(bool p_subresources = false) const;
void lock();
void unlock();
//this is used for compression
enum DetectChannels {
DETECTED_L,
DETECTED_LA,
DETECTED_R,
DETECTED_RG,
DETECTED_RGB,
DETECTED_RGBA,
};
DetectChannels get_detected_channels();
void optimize_channels();
Color get_pixelv(const Point2 &p_src) const;
Color get_pixel(int p_x, int p_y) const;
void set_pixelv(const Point2 &p_dst, const Color &p_color);
void set_pixel(int p_x, int p_y, const Color &p_color);
void copy_internals_from(const Ref<Image> &p_image) {
ERR_FAIL_COND_MSG(p_image.is_null(), "It's not a reference to a valid Image object.");
format = p_image->format;
width = p_image->width;
height = p_image->height;
mipmaps = p_image->mipmaps;
data = p_image->data;
}
~Image();
};
VARIANT_ENUM_CAST(Image::Format)
VARIANT_ENUM_CAST(Image::Interpolation)
VARIANT_ENUM_CAST(Image::CompressMode)
VARIANT_ENUM_CAST(Image::CompressSource)
VARIANT_ENUM_CAST(Image::AlphaMode)
#endif
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