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image.cpp
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/*************************************************************************/
/* image.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 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. */
/*************************************************************************/
#include "image.h"
#include "core/io/image_loader.h"
#include "core/os/copymem.h"
#include "hash_map.h"
#include "print_string.h"
#include "thirdparty/misc/hq2x.h"
#include <stdio.h>
const char *Image::format_names[Image::FORMAT_MAX] = {
"Lum8", //luminance
"LumAlpha8", //luminance-alpha
"Red8",
"RedGreen",
"RGB8",
"RGBA8",
"RGBA4444",
"RGBA5551",
"RFloat", //float
"RGFloat",
"RGBFloat",
"RGBAFloat",
"RHalf", //half float
"RGHalf",
"RGBHalf",
"RGBAHalf",
"RGBE9995",
"DXT1 RGB8", //s3tc
"DXT3 RGBA8",
"DXT5 RGBA8",
"RGTC Red8",
"RGTC RedGreen8",
"BPTC_RGBA",
"BPTC_RGBF",
"BPTC_RGBFU",
"PVRTC2", //pvrtc
"PVRTC2A",
"PVRTC4",
"PVRTC4A",
"ETC", //etc1
"ETC2_R11", //etc2
"ETC2_R11S", //signed", NOT srgb.
"ETC2_RG11",
"ETC2_RG11S",
"ETC2_RGB8",
"ETC2_RGBA8",
"ETC2_RGB8A1",
};
SavePNGFunc Image::save_png_func = NULL;
void Image::_put_pixelb(int p_x, int p_y, uint32_t p_pixelsize, uint8_t *p_data, const uint8_t *p_pixel) {
uint32_t ofs = (p_y * width + p_x) * p_pixelsize;
for (uint32_t i = 0; i < p_pixelsize; i++) {
p_data[ofs + i] = p_pixel[i];
}
}
void Image::_get_pixelb(int p_x, int p_y, uint32_t p_pixelsize, const uint8_t *p_data, uint8_t *p_pixel) {
uint32_t ofs = (p_y * width + p_x) * p_pixelsize;
for (uint32_t i = 0; i < p_pixelsize; i++) {
p_pixel[i] = p_data[ofs + i];
}
}
int Image::get_format_pixel_size(Format p_format) {
switch (p_format) {
case FORMAT_L8:
return 1; //luminance
case FORMAT_LA8:
return 2; //luminance-alpha
case FORMAT_R8: return 1;
case FORMAT_RG8: return 2;
case FORMAT_RGB8: return 3;
case FORMAT_RGBA8: return 4;
case FORMAT_RGBA4444: return 2;
case FORMAT_RGBA5551: return 2;
case FORMAT_RF:
return 4; //float
case FORMAT_RGF: return 8;
case FORMAT_RGBF: return 12;
case FORMAT_RGBAF: return 16;
case FORMAT_RH:
return 2; //half float
case FORMAT_RGH: return 4;
case FORMAT_RGBH: return 6;
case FORMAT_RGBAH: return 8;
case FORMAT_RGBE9995: return 4;
case FORMAT_DXT1:
return 1; //s3tc bc1
case FORMAT_DXT3:
return 1; //bc2
case FORMAT_DXT5:
return 1; //bc3
case FORMAT_RGTC_R:
return 1; //bc4
case FORMAT_RGTC_RG:
return 1; //bc5
case FORMAT_BPTC_RGBA:
return 1; //btpc bc6h
case FORMAT_BPTC_RGBF:
return 1; //float /
case FORMAT_BPTC_RGBFU:
return 1; //unsigned float
case FORMAT_PVRTC2:
return 1; //pvrtc
case FORMAT_PVRTC2A: return 1;
case FORMAT_PVRTC4: return 1;
case FORMAT_PVRTC4A: return 1;
case FORMAT_ETC:
return 1; //etc1
case FORMAT_ETC2_R11:
return 1; //etc2
case FORMAT_ETC2_R11S:
return 1; //signed: return 1; NOT srgb.
case FORMAT_ETC2_RG11: return 1;
case FORMAT_ETC2_RG11S: return 1;
case FORMAT_ETC2_RGB8: return 1;
case FORMAT_ETC2_RGBA8: return 1;
case FORMAT_ETC2_RGB8A1: return 1;
case FORMAT_MAX: {
}
}
return 0;
}
void Image::get_format_min_pixel_size(Format p_format, int &r_w, int &r_h) {
switch (p_format) {
case FORMAT_DXT1: //s3tc bc1
case FORMAT_DXT3: //bc2
case FORMAT_DXT5: //bc3
case FORMAT_RGTC_R: //bc4
case FORMAT_RGTC_RG: { //bc5 case case FORMAT_DXT1:
r_w = 4;
r_h = 4;
} break;
case FORMAT_PVRTC2:
case FORMAT_PVRTC2A: {
r_w = 16;
r_h = 8;
} break;
case FORMAT_PVRTC4A:
case FORMAT_PVRTC4: {
r_w = 8;
r_h = 8;
} break;
case FORMAT_ETC: {
r_w = 4;
r_h = 4;
} break;
case FORMAT_BPTC_RGBA:
case FORMAT_BPTC_RGBF:
case FORMAT_BPTC_RGBFU: {
r_w = 4;
r_h = 4;
} break;
case FORMAT_ETC2_R11: //etc2
case FORMAT_ETC2_R11S: //signed: NOT srgb.
case FORMAT_ETC2_RG11:
case FORMAT_ETC2_RG11S:
case FORMAT_ETC2_RGB8:
case FORMAT_ETC2_RGBA8:
case FORMAT_ETC2_RGB8A1: {
r_w = 4;
r_h = 4;
} break;
default: {
r_w = 1;
r_h = 1;
} break;
}
}
int Image::get_format_pixel_rshift(Format p_format) {
if (p_format == FORMAT_DXT1 || p_format == FORMAT_RGTC_R || p_format == FORMAT_PVRTC4 || p_format == FORMAT_PVRTC4A || p_format == FORMAT_ETC || p_format == FORMAT_ETC2_R11 || p_format == FORMAT_ETC2_R11S || p_format == FORMAT_ETC2_RGB8 || p_format == FORMAT_ETC2_RGB8A1)
return 1;
else if (p_format == FORMAT_PVRTC2 || p_format == FORMAT_PVRTC2A)
return 2;
else
return 0;
}
int Image::get_format_block_size(Format p_format) {
switch (p_format) {
case FORMAT_DXT1: //s3tc bc1
case FORMAT_DXT3: //bc2
case FORMAT_DXT5: //bc3
case FORMAT_RGTC_R: //bc4
case FORMAT_RGTC_RG: { //bc5 case case FORMAT_DXT1:
return 4;
} break;
case FORMAT_PVRTC2:
case FORMAT_PVRTC2A: {
return 4;
} break;
case FORMAT_PVRTC4A:
case FORMAT_PVRTC4: {
return 4;
} break;
case FORMAT_ETC: {
return 4;
} break;
case FORMAT_BPTC_RGBA:
case FORMAT_BPTC_RGBF:
case FORMAT_BPTC_RGBFU: {
return 4;
} break;
case FORMAT_ETC2_R11: //etc2
case FORMAT_ETC2_R11S: //signed: NOT srgb.
case FORMAT_ETC2_RG11:
case FORMAT_ETC2_RG11S:
case FORMAT_ETC2_RGB8:
case FORMAT_ETC2_RGBA8:
case FORMAT_ETC2_RGB8A1: {
return 4;
} break;
default: {
}
}
return 1;
}
void Image::_get_mipmap_offset_and_size(int p_mipmap, int &r_offset, int &r_width, int &r_height) const {
int w = width;
int h = height;
int ofs = 0;
int pixel_size = get_format_pixel_size(format);
int pixel_rshift = get_format_pixel_rshift(format);
int block = get_format_block_size(format);
int minw, minh;
get_format_min_pixel_size(format, minw, minh);
for (int i = 0; i < p_mipmap; i++) {
int bw = w % block != 0 ? w + (block - w % block) : w;
int bh = h % block != 0 ? h + (block - h % block) : h;
int s = bw * bh;
s *= pixel_size;
s >>= pixel_rshift;
ofs += s;
w = MAX(minw, w >> 1);
h = MAX(minh, h >> 1);
}
r_offset = ofs;
r_width = w;
r_height = h;
}
int Image::get_mipmap_offset(int p_mipmap) const {
ERR_FAIL_INDEX_V(p_mipmap, get_mipmap_count() + 1, -1);
int ofs, w, h;
_get_mipmap_offset_and_size(p_mipmap, ofs, w, h);
return ofs;
}
void Image::get_mipmap_offset_and_size(int p_mipmap, int &r_ofs, int &r_size) const {
int ofs, w, h;
_get_mipmap_offset_and_size(p_mipmap, ofs, w, h);
int ofs2;
_get_mipmap_offset_and_size(p_mipmap + 1, ofs2, w, h);
r_ofs = ofs;
r_size = ofs2 - ofs;
}
void Image::get_mipmap_offset_size_and_dimensions(int p_mipmap, int &r_ofs, int &r_size, int &w, int &h) const {
int ofs;
_get_mipmap_offset_and_size(p_mipmap, ofs, w, h);
int ofs2, w2, h2;
_get_mipmap_offset_and_size(p_mipmap + 1, ofs2, w2, h2);
r_ofs = ofs;
r_size = ofs2 - ofs;
}
int Image::get_width() const {
return width;
}
int Image::get_height() const {
return height;
}
Vector2 Image::get_size() const {
return Vector2(width, height);
}
bool Image::has_mipmaps() const {
return mipmaps;
}
int Image::get_mipmap_count() const {
if (mipmaps)
return get_image_required_mipmaps(width, height, format);
else
return 0;
}
//using template generates perfectly optimized code due to constant expression reduction and unused variable removal present in all compilers
template <uint32_t read_bytes, bool read_alpha, uint32_t write_bytes, bool write_alpha, bool read_gray, bool write_gray>
static void _convert(int p_width, int p_height, const uint8_t *p_src, uint8_t *p_dst) {
for (int y = 0; y < p_height; y++) {
for (int x = 0; x < p_width; x++) {
const uint8_t *rofs = &p_src[((y * p_width) + x) * (read_bytes + (read_alpha ? 1 : 0))];
uint8_t *wofs = &p_dst[((y * p_width) + x) * (write_bytes + (write_alpha ? 1 : 0))];
uint8_t rgba[4];
if (read_gray) {
rgba[0] = rofs[0];
rgba[1] = rofs[0];
rgba[2] = rofs[0];
} else {
for (uint32_t i = 0; i < MAX(read_bytes, write_bytes); i++) {
rgba[i] = (i < read_bytes) ? rofs[i] : 0;
}
}
if (read_alpha || write_alpha) {
rgba[3] = read_alpha ? rofs[read_bytes] : 255;
}
if (write_gray) {
//TODO: not correct grayscale, should use fixed point version of actual weights
wofs[0] = uint8_t((uint16_t(rofs[0]) + uint16_t(rofs[1]) + uint16_t(rofs[2])) / 3);
} else {
for (uint32_t i = 0; i < write_bytes; i++) {
wofs[i] = rgba[i];
}
}
if (write_alpha) {
wofs[write_bytes] = rgba[3];
}
}
}
}
void Image::convert(Format p_new_format) {
if (data.size() == 0)
return;
if (p_new_format == format)
return;
if (format > FORMAT_RGBE9995 || p_new_format > FORMAT_RGBE9995) {
ERR_EXPLAIN("Cannot convert to <-> from compressed formats. Use compress() and decompress() instead.");
ERR_FAIL();
} else if (format > FORMAT_RGBA8 || p_new_format > FORMAT_RGBA8) {
//use put/set pixel which is slower but works with non byte formats
Image new_img(width, height, 0, p_new_format);
lock();
new_img.lock();
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
new_img.set_pixel(i, j, get_pixel(i, j));
}
}
unlock();
new_img.unlock();
if (has_mipmaps()) {
new_img.generate_mipmaps();
}
_copy_internals_from(new_img);
return;
}
Image new_img(width, height, 0, p_new_format);
//int len=data.size();
PoolVector<uint8_t>::Read r = data.read();
PoolVector<uint8_t>::Write w = new_img.data.write();
const uint8_t *rptr = r.ptr();
uint8_t *wptr = w.ptr();
int conversion_type = format | p_new_format << 8;
switch (conversion_type) {
case FORMAT_L8 | (FORMAT_LA8 << 8): _convert<1, false, 1, true, true, true>(width, height, rptr, wptr); break;
case FORMAT_L8 | (FORMAT_R8 << 8): _convert<1, false, 1, false, true, false>(width, height, rptr, wptr); break;
case FORMAT_L8 | (FORMAT_RG8 << 8): _convert<1, false, 2, false, true, false>(width, height, rptr, wptr); break;
case FORMAT_L8 | (FORMAT_RGB8 << 8): _convert<1, false, 3, false, true, false>(width, height, rptr, wptr); break;
case FORMAT_L8 | (FORMAT_RGBA8 << 8): _convert<1, false, 3, true, true, false>(width, height, rptr, wptr); break;
case FORMAT_LA8 | (FORMAT_L8 << 8): _convert<1, true, 1, false, true, true>(width, height, rptr, wptr); break;
case FORMAT_LA8 | (FORMAT_R8 << 8): _convert<1, true, 1, false, true, false>(width, height, rptr, wptr); break;
case FORMAT_LA8 | (FORMAT_RG8 << 8): _convert<1, true, 2, false, true, false>(width, height, rptr, wptr); break;
case FORMAT_LA8 | (FORMAT_RGB8 << 8): _convert<1, true, 3, false, true, false>(width, height, rptr, wptr); break;
case FORMAT_LA8 | (FORMAT_RGBA8 << 8): _convert<1, true, 3, true, true, false>(width, height, rptr, wptr); break;
case FORMAT_R8 | (FORMAT_L8 << 8): _convert<1, false, 1, false, false, true>(width, height, rptr, wptr); break;
case FORMAT_R8 | (FORMAT_LA8 << 8): _convert<1, false, 1, true, false, true>(width, height, rptr, wptr); break;
case FORMAT_R8 | (FORMAT_RG8 << 8): _convert<1, false, 2, false, false, false>(width, height, rptr, wptr); break;
case FORMAT_R8 | (FORMAT_RGB8 << 8): _convert<1, false, 3, false, false, false>(width, height, rptr, wptr); break;
case FORMAT_R8 | (FORMAT_RGBA8 << 8): _convert<1, false, 3, true, false, false>(width, height, rptr, wptr); break;
case FORMAT_RG8 | (FORMAT_L8 << 8): _convert<2, false, 1, false, false, true>(width, height, rptr, wptr); break;
case FORMAT_RG8 | (FORMAT_LA8 << 8): _convert<2, false, 1, true, false, true>(width, height, rptr, wptr); break;
case FORMAT_RG8 | (FORMAT_R8 << 8): _convert<2, false, 1, false, false, false>(width, height, rptr, wptr); break;
case FORMAT_RG8 | (FORMAT_RGB8 << 8): _convert<2, false, 3, false, false, false>(width, height, rptr, wptr); break;
case FORMAT_RG8 | (FORMAT_RGBA8 << 8): _convert<2, false, 3, true, false, false>(width, height, rptr, wptr); break;
case FORMAT_RGB8 | (FORMAT_L8 << 8): _convert<3, false, 1, false, false, true>(width, height, rptr, wptr); break;
case FORMAT_RGB8 | (FORMAT_LA8 << 8): _convert<3, false, 1, true, false, true>(width, height, rptr, wptr); break;
case FORMAT_RGB8 | (FORMAT_R8 << 8): _convert<3, false, 1, false, false, false>(width, height, rptr, wptr); break;
case FORMAT_RGB8 | (FORMAT_RG8 << 8): _convert<3, false, 2, false, false, false>(width, height, rptr, wptr); break;
case FORMAT_RGB8 | (FORMAT_RGBA8 << 8): _convert<3, false, 3, true, false, false>(width, height, rptr, wptr); break;
case FORMAT_RGBA8 | (FORMAT_L8 << 8): _convert<3, true, 1, false, false, true>(width, height, rptr, wptr); break;
case FORMAT_RGBA8 | (FORMAT_LA8 << 8): _convert<3, true, 1, true, false, true>(width, height, rptr, wptr); break;
case FORMAT_RGBA8 | (FORMAT_R8 << 8): _convert<3, true, 1, false, false, false>(width, height, rptr, wptr); break;
case FORMAT_RGBA8 | (FORMAT_RG8 << 8): _convert<3, true, 2, false, false, false>(width, height, rptr, wptr); break;
case FORMAT_RGBA8 | (FORMAT_RGB8 << 8): _convert<3, true, 3, false, false, false>(width, height, rptr, wptr); break;
}
r = PoolVector<uint8_t>::Read();
w = PoolVector<uint8_t>::Write();
bool gen_mipmaps = mipmaps;
//mipmaps=false;
_copy_internals_from(new_img);
if (gen_mipmaps)
generate_mipmaps();
}
Image::Format Image::get_format() const {
return format;
}
static double _bicubic_interp_kernel(double x) {
x = ABS(x);
double bc = 0;
if (x <= 1)
bc = (1.5 * x - 2.5) * x * x + 1;
else if (x < 2)
bc = ((-0.5 * x + 2.5) * x - 4) * x + 2;
return bc;
}
template <int CC>
static void _scale_cubic(const uint8_t *p_src, uint8_t *p_dst, uint32_t p_src_width, uint32_t p_src_height, uint32_t p_dst_width, uint32_t p_dst_height) {
// get source image size
int width = p_src_width;
int height = p_src_height;
double xfac = (double)width / p_dst_width;
double yfac = (double)height / p_dst_height;
// coordinates of source points and coefficients
double ox, oy, dx, dy, k1, k2;
int ox1, oy1, ox2, oy2;
// destination pixel values
// width and height decreased by 1
int ymax = height - 1;
int xmax = width - 1;
// temporary pointer
for (uint32_t y = 0; y < p_dst_height; y++) {
// Y coordinates
oy = (double)y * yfac - 0.5f;
oy1 = (int)oy;
dy = oy - (double)oy1;
for (uint32_t x = 0; x < p_dst_width; x++) {
// X coordinates
ox = (double)x * xfac - 0.5f;
ox1 = (int)ox;
dx = ox - (double)ox1;
// initial pixel value
uint8_t *dst = p_dst + (y * p_dst_width + x) * CC;
double color[CC];
for (int i = 0; i < CC; i++) {
color[i] = 0;
}
for (int n = -1; n < 3; n++) {
// get Y coefficient
k1 = _bicubic_interp_kernel(dy - (double)n);
oy2 = oy1 + n;
if (oy2 < 0)
oy2 = 0;
if (oy2 > ymax)
oy2 = ymax;
for (int m = -1; m < 3; m++) {
// get X coefficient
k2 = k1 * _bicubic_interp_kernel((double)m - dx);
ox2 = ox1 + m;
if (ox2 < 0)
ox2 = 0;
if (ox2 > xmax)
ox2 = xmax;
// get pixel of original image
const uint8_t *p = p_src + (oy2 * p_src_width + ox2) * CC;
for (int i = 0; i < CC; i++) {
color[i] += p[i] * k2;
}
}
}
for (int i = 0; i < CC; i++) {
dst[i] = CLAMP(Math::fast_ftoi(color[i]), 0, 255);
}
}
}
}
template <int CC>
static void _scale_bilinear(const uint8_t *p_src, uint8_t *p_dst, uint32_t p_src_width, uint32_t p_src_height, uint32_t p_dst_width, uint32_t p_dst_height) {
enum {
FRAC_BITS = 8,
FRAC_LEN = (1 << FRAC_BITS),
FRAC_MASK = FRAC_LEN - 1
};
for (uint32_t i = 0; i < p_dst_height; i++) {
uint32_t src_yofs_up_fp = (i * p_src_height * FRAC_LEN / p_dst_height);
uint32_t src_yofs_frac = src_yofs_up_fp & FRAC_MASK;
uint32_t src_yofs_up = src_yofs_up_fp >> FRAC_BITS;
uint32_t src_yofs_down = (i + 1) * p_src_height / p_dst_height;
if (src_yofs_down >= p_src_height)
src_yofs_down = p_src_height - 1;
//src_yofs_up*=CC;
//src_yofs_down*=CC;
uint32_t y_ofs_up = src_yofs_up * p_src_width * CC;
uint32_t y_ofs_down = src_yofs_down * p_src_width * CC;
for (uint32_t j = 0; j < p_dst_width; j++) {
uint32_t src_xofs_left_fp = (j * p_src_width * FRAC_LEN / p_dst_width);
uint32_t src_xofs_frac = src_xofs_left_fp & FRAC_MASK;
uint32_t src_xofs_left = src_xofs_left_fp >> FRAC_BITS;
uint32_t src_xofs_right = (j + 1) * p_src_width / p_dst_width;
if (src_xofs_right >= p_src_width)
src_xofs_right = p_src_width - 1;
src_xofs_left *= CC;
src_xofs_right *= CC;
for (uint32_t l = 0; l < CC; l++) {
uint32_t p00 = p_src[y_ofs_up + src_xofs_left + l] << FRAC_BITS;
uint32_t p10 = p_src[y_ofs_up + src_xofs_right + l] << FRAC_BITS;
uint32_t p01 = p_src[y_ofs_down + src_xofs_left + l] << FRAC_BITS;
uint32_t p11 = p_src[y_ofs_down + src_xofs_right + l] << FRAC_BITS;
uint32_t interp_up = p00 + (((p10 - p00) * src_xofs_frac) >> FRAC_BITS);
uint32_t interp_down = p01 + (((p11 - p01) * src_xofs_frac) >> FRAC_BITS);
uint32_t interp = interp_up + (((interp_down - interp_up) * src_yofs_frac) >> FRAC_BITS);
interp >>= FRAC_BITS;
p_dst[i * p_dst_width * CC + j * CC + l] = interp;
}
}
}
}
template <int CC>
static void _scale_nearest(const uint8_t *p_src, uint8_t *p_dst, uint32_t p_src_width, uint32_t p_src_height, uint32_t p_dst_width, uint32_t p_dst_height) {
for (uint32_t i = 0; i < p_dst_height; i++) {
uint32_t src_yofs = i * p_src_height / p_dst_height;
uint32_t y_ofs = src_yofs * p_src_width * CC;
for (uint32_t j = 0; j < p_dst_width; j++) {
uint32_t src_xofs = j * p_src_width / p_dst_width;
src_xofs *= CC;
for (uint32_t l = 0; l < CC; l++) {
uint32_t p = p_src[y_ofs + src_xofs + l];
p_dst[i * p_dst_width * CC + j * CC + l] = p;
}
}
}
}
void Image::resize_to_po2(bool p_square) {
if (!_can_modify(format)) {
ERR_EXPLAIN("Cannot resize in indexed, compressed or custom image formats.");
ERR_FAIL();
}
int w = next_power_of_2(width);
int h = next_power_of_2(height);
if (w == width && h == height) {
if (!p_square || w == h)
return; //nothing to do
}
resize(w, h);
}
void Image::resize(int p_width, int p_height, Interpolation p_interpolation) {
if (!_can_modify(format)) {
ERR_EXPLAIN("Cannot resize in indexed, compressed or custom image formats.");
ERR_FAIL();
}
ERR_FAIL_COND(p_width <= 0);
ERR_FAIL_COND(p_height <= 0);
ERR_FAIL_COND(p_width > MAX_WIDTH);
ERR_FAIL_COND(p_height > MAX_HEIGHT);
if (p_width == width && p_height == height)
return;
Image dst(p_width, p_height, 0, format);
PoolVector<uint8_t>::Read r = data.read();
const unsigned char *r_ptr = r.ptr();
PoolVector<uint8_t>::Write w = dst.data.write();
unsigned char *w_ptr = w.ptr();
switch (p_interpolation) {
case INTERPOLATE_NEAREST: {
switch (get_format_pixel_size(format)) {
case 1: _scale_nearest<1>(r_ptr, w_ptr, width, height, p_width, p_height); break;
case 2: _scale_nearest<2>(r_ptr, w_ptr, width, height, p_width, p_height); break;
case 3: _scale_nearest<3>(r_ptr, w_ptr, width, height, p_width, p_height); break;
case 4: _scale_nearest<4>(r_ptr, w_ptr, width, height, p_width, p_height); break;
}
} break;
case INTERPOLATE_BILINEAR: {
switch (get_format_pixel_size(format)) {
case 1: _scale_bilinear<1>(r_ptr, w_ptr, width, height, p_width, p_height); break;
case 2: _scale_bilinear<2>(r_ptr, w_ptr, width, height, p_width, p_height); break;
case 3: _scale_bilinear<3>(r_ptr, w_ptr, width, height, p_width, p_height); break;
case 4: _scale_bilinear<4>(r_ptr, w_ptr, width, height, p_width, p_height); break;
}
} break;
case INTERPOLATE_CUBIC: {
switch (get_format_pixel_size(format)) {
case 1: _scale_cubic<1>(r_ptr, w_ptr, width, height, p_width, p_height); break;
case 2: _scale_cubic<2>(r_ptr, w_ptr, width, height, p_width, p_height); break;
case 3: _scale_cubic<3>(r_ptr, w_ptr, width, height, p_width, p_height); break;
case 4: _scale_cubic<4>(r_ptr, w_ptr, width, height, p_width, p_height); break;
}
} break;
}
r = PoolVector<uint8_t>::Read();
w = PoolVector<uint8_t>::Write();
if (mipmaps > 0)
dst.generate_mipmaps();
_copy_internals_from(dst);
}
void Image::crop(int p_width, int p_height) {
if (!_can_modify(format)) {
ERR_EXPLAIN("Cannot crop in indexed, compressed or custom image formats.");
ERR_FAIL();
}
ERR_FAIL_COND(p_width <= 0);
ERR_FAIL_COND(p_height <= 0);
ERR_FAIL_COND(p_width > MAX_WIDTH);
ERR_FAIL_COND(p_height > MAX_HEIGHT);
/* to save memory, cropping should be done in-place, however, since this function
will most likely either not be used much, or in critical areas, for now it wont, because
it's a waste of time. */
if (p_width == width && p_height == height)
return;
uint8_t pdata[16]; //largest is 16
uint32_t pixel_size = get_format_pixel_size(format);
Image dst(p_width, p_height, 0, format);
{
PoolVector<uint8_t>::Read r = data.read();
PoolVector<uint8_t>::Write w = dst.data.write();
for (int y = 0; y < p_height; y++) {
for (int x = 0; x < p_width; x++) {
if ((x >= width || y >= height)) {
for (uint32_t i = 0; i < pixel_size; i++)
pdata[i] = 0;
} else {
_get_pixelb(x, y, pixel_size, r.ptr(), pdata);
}
dst._put_pixelb(x, y, pixel_size, w.ptr(), pdata);
}
}
}
if (mipmaps > 0)
dst.generate_mipmaps();
_copy_internals_from(dst);
}
void Image::flip_y() {
if (!_can_modify(format)) {
ERR_EXPLAIN("Cannot flip_y in indexed, compressed or custom image formats.");
ERR_FAIL();
}
bool gm = mipmaps;
if (gm)
clear_mipmaps();
{
PoolVector<uint8_t>::Write w = data.write();
uint8_t up[16];
uint8_t down[16];
uint32_t pixel_size = get_format_pixel_size(format);
for (int y = 0; y < height / 2; y++) {
for (int x = 0; x < width; x++) {
_get_pixelb(x, y, pixel_size, w.ptr(), up);
_get_pixelb(x, height - y - 1, pixel_size, w.ptr(), down);
_put_pixelb(x, height - y - 1, pixel_size, w.ptr(), up);
_put_pixelb(x, y, pixel_size, w.ptr(), down);
}
}
}
if (gm)
generate_mipmaps();
}
void Image::flip_x() {
if (!_can_modify(format)) {
ERR_EXPLAIN("Cannot flip_x in indexed, compressed or custom image formats.");
ERR_FAIL();
}
bool gm = mipmaps;
if (gm)
clear_mipmaps();
{
PoolVector<uint8_t>::Write w = data.write();
uint8_t up[16];
uint8_t down[16];
uint32_t pixel_size = get_format_pixel_size(format);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width / 2; x++) {
_get_pixelb(x, y, pixel_size, w.ptr(), up);
_get_pixelb(width - x - 1, y, pixel_size, w.ptr(), down);
_put_pixelb(width - x - 1, y, pixel_size, w.ptr(), up);
_put_pixelb(x, y, pixel_size, w.ptr(), down);
}
}
}
if (gm)
generate_mipmaps();
}
int Image::_get_dst_image_size(int p_width, int p_height, Format p_format, int &r_mipmaps, int p_mipmaps) {
int size = 0;
int w = p_width;
int h = p_height;
int mm = 0;
int pixsize = get_format_pixel_size(p_format);
int pixshift = get_format_pixel_rshift(p_format);
int block = get_format_block_size(p_format);
int minw, minh;
get_format_min_pixel_size(p_format, minw, minh);
while (true) {
int bw = w % block != 0 ? w + (block - w % block) : w;
int bh = h % block != 0 ? h + (block - h % block) : h;
int s = bw * bh;
s *= pixsize;
s >>= pixshift;
size += s;
if (p_mipmaps >= 0 && mm == p_mipmaps)
break;
if (p_mipmaps >= 0) {
w = MAX(minw, w >> 1);
h = MAX(minh, h >> 1);
} else {
if (w == minw && h == minh)
break;
w = MAX(minw, w >> 1);
h = MAX(minh, h >> 1);
}
mm++;
};
r_mipmaps = mm;
return size;
}
bool Image::_can_modify(Format p_format) const {
return p_format <= FORMAT_RGBE9995;
}
template <int CC>
static void _generate_po2_mipmap(const uint8_t *p_src, uint8_t *p_dst, uint32_t p_width, uint32_t p_height) {
//fast power of 2 mipmap generation
uint32_t dst_w = p_width >> 1;
uint32_t dst_h = p_height >> 1;
for (uint32_t i = 0; i < dst_h; i++) {
const uint8_t *rup_ptr = &p_src[i * 2 * p_width * CC];
const uint8_t *rdown_ptr = rup_ptr + p_width * CC;
uint8_t *dst_ptr = &p_dst[i * dst_w * CC];
uint32_t count = dst_w;
while (count--) {
for (int j = 0; j < CC; j++) {
uint16_t val = 0;
val += rup_ptr[j];
val += rup_ptr[j + CC];
val += rdown_ptr[j];
val += rdown_ptr[j + CC];
dst_ptr[j] = val >> 2;
}
dst_ptr += CC;
rup_ptr += CC * 2;
rdown_ptr += CC * 2;
}
}
}
void Image::expand_x2_hq2x() {
ERR_FAIL_COND(!_can_modify(format));
Format current = format;
bool mm = has_mipmaps();
if (mm) {
clear_mipmaps();
}
if (current != FORMAT_RGBA8)
convert(FORMAT_RGBA8);
PoolVector<uint8_t> dest;
dest.resize(width * 2 * height * 2 * 4);
{
PoolVector<uint8_t>::Read r = data.read();
PoolVector<uint8_t>::Write w = dest.write();
hq2x_resize((const uint32_t *)r.ptr(), width, height, (uint32_t *)w.ptr());
}
width *= 2;
height *= 2;
data = dest;
if (current != FORMAT_RGBA8)
convert(current);
if (mipmaps) {
generate_mipmaps();
}
}
void Image::shrink_x2() {
ERR_FAIL_COND(data.size() == 0);
if (mipmaps) {