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godot/core/image.cpp
Juan Linietsky d6e30256ad ability to shrink all images x2 on load 
this is for extreme cases when running on devices with very low video
memory, so you can still retain compatibility.
2016-05-05 18:43:47 -03:00

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/*************************************************************************/
/* image.cpp */
/*************************************************************************/
/* 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. */
/*************************************************************************/
#include "image.h"
#include "hash_map.h"
#include "core/io/image_loader.h"
#include "core/os/copymem.h"
#include "print_string.h"
#include <stdio.h>
const char* Image::format_names[Image::FORMAT_MAX]={
"Grayscale",
"Intensity",
"GrayscaleAlpha",
"RGB",
"RGBA",
"Indexed",
"IndexedAlpha",
"YUV422",
"YUV444",
"BC1",
"BC2",
"BC3",
"BC4",
"BC5",
"PVRTC2",
"PVRTC2Alpha",
"PVRTC4",
"PVRTC4Alpha",
"ETC",
"ATC",
"ATCAlphaExp",
"ATCAlphaInterp",
};
SavePNGFunc Image::save_png_func = NULL;
void Image::_put_pixel(int p_x,int p_y, const BColor& p_color, unsigned char *p_data) {
_put_pixelw(p_x,p_y,width,p_color,p_data);
}
void Image::_put_pixelw(int p_x,int p_y, int p_width, const BColor& p_color, unsigned char *p_data) {
int ofs=p_y*p_width+p_x;
switch(format) {
case FORMAT_GRAYSCALE: {
p_data[ofs]=p_color.gray();
} break;
case FORMAT_INTENSITY: {
p_data[ofs]=p_color.a;
} break;
case FORMAT_GRAYSCALE_ALPHA: {
p_data[ofs*2]=p_color.gray();
p_data[ofs*2+1]=p_color.a;
} break;
case FORMAT_RGB: {
p_data[ofs*3+0]=p_color.r;
p_data[ofs*3+1]=p_color.g;
p_data[ofs*3+2]=p_color.b;
} break;
case FORMAT_RGBA: {
p_data[ofs*4+0]=p_color.r;
p_data[ofs*4+1]=p_color.g;
p_data[ofs*4+2]=p_color.b;
p_data[ofs*4+3]=p_color.a;
} break;
case FORMAT_INDEXED:
case FORMAT_INDEXED_ALPHA: {
ERR_FAIL();
} break;
default: {};
}
}
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 minw,minh;
_get_format_min_data_size(format,minw,minh);
for(int i=0;i<p_mipmap;i++) {
int s = w*h;
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,(mipmaps+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;
}
void Image::put_pixel(int p_x,int p_y, const Color& p_color,int p_mipmap){
ERR_FAIL_INDEX(p_mipmap,mipmaps+1);
int ofs,w,h;
_get_mipmap_offset_and_size(p_mipmap,ofs,w,h);
ERR_FAIL_INDEX(p_x,w);
ERR_FAIL_INDEX(p_y,h);
DVector<uint8_t>::Write wp = data.write();
unsigned char *data_ptr=wp.ptr();
_put_pixelw(p_x,p_y,w,BColor(p_color.r*255,p_color.g*255,p_color.b*255,p_color.a*255),&data_ptr[ofs]);
}
Image::BColor Image::_get_pixel(int p_x,int p_y,const unsigned char *p_data,int p_data_size) const{
return _get_pixelw(p_x,p_y,width,p_data,p_data_size);
}
Image::BColor Image::_get_pixelw(int p_x,int p_y,int p_width,const unsigned char *p_data,int p_data_size) const{
int ofs=p_y*p_width+p_x;
BColor result(0,0,0,0);
switch(format) {
case FORMAT_GRAYSCALE: {
result=BColor(p_data[ofs],p_data[ofs],p_data[ofs],255.0);
} break;
case FORMAT_INTENSITY: {
result=BColor(255,255,255,p_data[ofs]);
} break;
case FORMAT_GRAYSCALE_ALPHA: {
result=BColor(p_data[ofs*2],p_data[ofs*2],p_data[ofs*2],p_data[ofs*2+1]);
} break;
case FORMAT_RGB: {
result=BColor(p_data[ofs*3],p_data[ofs*3+1],p_data[ofs*3+2]);
} break;
case FORMAT_RGBA: {
result=BColor(p_data[ofs*4],p_data[ofs*4+1],p_data[ofs*4+2],p_data[ofs*4+3]);
} break;
case FORMAT_INDEXED_ALPHA: {
int pitch = 4;
const uint8_t* pal = &p_data[ p_data_size - pitch * 256 ];
int idx = p_data[ofs];
result=BColor(pal[idx * pitch + 0] , pal[idx * pitch + 1] , pal[idx * pitch + 2] , pal[idx * pitch + 3] );
} break;
case FORMAT_INDEXED: {
int pitch = 3;
const uint8_t* pal = &p_data[ p_data_size - pitch * 256 ];
int idx = p_data[ofs];
result=BColor(pal[idx * pitch + 0] , pal[idx * pitch + 1] , pal[idx * pitch + 2] ,255);
} break;
case FORMAT_YUV_422: {
int y, u, v;
if (p_x % 2) {
const uint8_t* yp = &p_data[p_width * 2 * p_y + p_x * 2];
u = *(yp-1);
y = yp[0];
v = yp[1];
} else {
const uint8_t* yp = &p_data[p_width * 2 * p_y + p_x * 2];
y = yp[0];
u = yp[1];
v = yp[3];
};
int32_t r = 1.164 * (y - 16) + 1.596 * (v - 128);
int32_t g = 1.164 * (y - 16) - 0.813 * (v - 128) - 0.391 * (u - 128);
int32_t b = 1.164 * (y - 16) + 2.018 * (u - 128);
result = BColor(CLAMP(r, 0, 255), CLAMP(g, 0, 255), CLAMP(b, 0, 255));
} break;
case FORMAT_YUV_444: {
uint8_t y, u, v;
const uint8_t* yp = &p_data[p_width * 3 * p_y + p_x * 3];
y = yp[0];
u = yp[1];
v = yp[2];
int32_t r = 1.164 * (y - 16) + 1.596 * (v - 128);
int32_t g = 1.164 * (y - 16) - 0.813 * (v - 128) - 0.391 * (u - 128);
int32_t b = 1.164 * (y - 16) + 2.018 * (u - 128);
result = BColor(CLAMP(r, 0, 255), CLAMP(g, 0, 255), CLAMP(b, 0, 255));
} break;
default:{}
}
return result;
}
void Image::put_indexed_pixel(int p_x, int p_y, uint8_t p_idx,int p_mipmap) {
ERR_FAIL_COND(format != FORMAT_INDEXED && format != FORMAT_INDEXED_ALPHA);
ERR_FAIL_INDEX(p_mipmap,mipmaps+1);
int ofs,w,h;
_get_mipmap_offset_and_size(p_mipmap,ofs,w,h);
ERR_FAIL_INDEX(p_x,w);
ERR_FAIL_INDEX(p_y,h);
data.set(ofs + p_y * w + p_x, p_idx);
};
uint8_t Image::get_indexed_pixel(int p_x, int p_y,int p_mipmap) const {
ERR_FAIL_COND_V(format != FORMAT_INDEXED && format != FORMAT_INDEXED_ALPHA, 0);
ERR_FAIL_INDEX_V(p_mipmap,mipmaps+1,0);
int ofs,w,h;
_get_mipmap_offset_and_size(p_mipmap,ofs,w,h);
ERR_FAIL_INDEX_V(p_x,w,0);
ERR_FAIL_INDEX_V(p_y,h,0);
return data[ofs + p_y * w + p_x];
};
void Image::set_pallete(const DVector<uint8_t>& p_data) {
int len = p_data.size();
ERR_FAIL_COND(format != FORMAT_INDEXED && format != FORMAT_INDEXED_ALPHA);
ERR_FAIL_COND(format == FORMAT_INDEXED && len!=(256*3));
ERR_FAIL_COND(format == FORMAT_INDEXED_ALPHA && len!=(256*4));
int ofs,w,h;
_get_mipmap_offset_and_size(mipmaps+1,ofs,w,h);
int pal_ofs = ofs;
data.resize(pal_ofs + p_data.size());
DVector<uint8_t>::Write wp = data.write();
unsigned char *dst=wp.ptr() + pal_ofs;
DVector<uint8_t>::Read r = p_data.read();
const unsigned char *src=r.ptr();
copymem(dst, src, len);
};
int Image::get_width() const {
return width;
}
int Image::get_height() const{
return height;
}
int Image::get_mipmaps() const {
return mipmaps;
}
Color Image::get_pixel(int p_x,int p_y,int p_mipmap) const {
ERR_FAIL_INDEX_V(p_mipmap,mipmaps+1,Color());
int ofs,w,h;
_get_mipmap_offset_and_size(p_mipmap,ofs,w,h);
ERR_FAIL_INDEX_V(p_x,w,Color());
ERR_FAIL_INDEX_V(p_y,h,Color());
int len = data.size();
DVector<uint8_t>::Read r = data.read();
const unsigned char*data_ptr=r.ptr();
BColor c = _get_pixelw(p_x,p_y,w,&data_ptr[ofs],len);
return Color( c.r/255.0,c.g/255.0,c.b/255.0,c.a/255.0 );
}
void Image::convert( Format p_new_format ){
if (data.size()==0)
return;
if (p_new_format==format)
return;
if (format>=FORMAT_BC1 || p_new_format>=FORMAT_BC1) {
ERR_EXPLAIN("Cannot convert to <-> from compressed/custom image formats (for now).");
ERR_FAIL();
}
if (p_new_format==FORMAT_INDEXED || p_new_format==FORMAT_INDEXED_ALPHA) {
return;
}
Image new_img(width,height,0,p_new_format);
int len=data.size();
DVector<uint8_t>::Read r = data.read();
DVector<uint8_t>::Write w = new_img.data.write();
const uint8_t *rptr = r.ptr();
uint8_t *wptr = w.ptr();
if (p_new_format==FORMAT_RGBA && format==FORMAT_INDEXED_ALPHA) {
//optimized unquantized form
int dataend = len-256*4;
const uint32_t *palpos = (const uint32_t*)&rptr[dataend];
uint32_t *dst32 = (uint32_t *)wptr;
for(int i=0;i<dataend;i++)
dst32[i]=palpos[rptr[i]]; //since this is read/write, endianness is not a problem
} else {
//this is temporary, must find a faster way to do it.
for(int i=0;i<width;i++)
for(int j=0;j<height;j++)
new_img._put_pixel(i,j,_get_pixel(i,j,rptr,len),wptr);
}
r = DVector<uint8_t>::Read();
w = DVector<uint8_t>::Write();
bool gen_mipmaps=mipmaps>0;
*this=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 cooefficiens
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 ( int y = 0; y < p_dst_height; y++ ) {
// Y coordinates
oy = (double) y * yfac - 0.5f;
oy1 = (int) oy;
dy = oy - (double) oy1;
for ( int 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 cooefficient
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 cooefficient
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 = nearest_power_of_2(width);
int h = nearest_power_of_2(height);
if (w==width && h==height) {
if (!p_square || w==h)
return; //nothing to do
}
resize(w,h);
}
Image Image::resized( int p_width, int p_height, int p_interpolation ) {
Image ret = *this;
ret.resize(p_width, p_height, (Interpolation)p_interpolation);
return ret;
};
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 );
if (format==FORMAT_INDEXED)
p_interpolation=INTERPOLATE_NEAREST;
DVector<uint8_t>::Read r = data.read();
const unsigned char*r_ptr=r.ptr();
DVector<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 = DVector<uint8_t>::Read();
w = DVector<uint8_t>::Write();
if (mipmaps>0)
dst.generate_mipmaps();
*this=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;
Image dst( p_width, p_height,0, format );
for (int y=0;y<p_height;y++) {
for (int x=0;x<p_width;x++) {
Color col = (x>=width || y>=height)? Color() : get_pixel(x,y);
dst.put_pixel(x,y,col);
}
}
if (mipmaps>0)
dst.generate_mipmaps();
*this=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();;
for (int y=0;y<(height/2);y++) {
for (int x=0;x<width;x++) {
Color up = get_pixel(x,y);
Color down = get_pixel(x,height-y-1);
put_pixel(x,y,down);
put_pixel(x,height-y-1,up);
}
}
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();;
for (int y=0;y<(height/2);y++) {
for (int x=0;x<width;x++) {
Color up = get_pixel(x,y);
Color down = get_pixel(width-x-1,y);
put_pixel(x,y,down);
put_pixel(width-x-1,y,up);
}
}
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 minw,minh;
_get_format_min_data_size(p_format,minw,minh);
switch(p_format) {
case FORMAT_INDEXED: pixsize=1; size=256*3; break;
case FORMAT_INDEXED_ALPHA: pixsize=1; size=256*4;break;
default: {}
} ;
while(true) {
int s = w*h;
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 {
switch(p_format) {
//these are OK
case FORMAT_GRAYSCALE:
case FORMAT_INTENSITY:
case FORMAT_GRAYSCALE_ALPHA:
case FORMAT_RGB:
case FORMAT_RGBA:
return true;
default:
return false;
}
return false;
}
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::shrink_x2() {
ERR_FAIL_COND(format==FORMAT_INDEXED || format==FORMAT_INDEXED_ALPHA);
ERR_FAIL_COND( data.size()==0 );
if (mipmaps) {
//just use the lower mipmap as base and copy all
DVector<uint8_t> new_img;
int ofs = get_mipmap_offset(1);
int new_size = data.size()-ofs;
new_img.resize(new_size);
{
DVector<uint8_t>::Write w=new_img.write();
DVector<uint8_t>::Read r=data.read();
copymem(w.ptr(),&r[ofs],new_size);
}
mipmaps--;
width/=2;
height/=2;
data=new_img;
} else {
DVector<uint8_t> new_img;
ERR_FAIL_COND( format>=FORMAT_INDEXED );
int ps = get_format_pixel_size(format);
new_img.resize((width/2)*(height/2)*ps);
{
DVector<uint8_t>::Write w=new_img.write();
DVector<uint8_t>::Read r=data.read();
switch(format) {
case FORMAT_GRAYSCALE:
case FORMAT_INTENSITY: _generate_po2_mipmap<1>(r.ptr(), w.ptr(), width,height); break;
case FORMAT_GRAYSCALE_ALPHA: _generate_po2_mipmap<2>(r.ptr(), w.ptr(), width,height); break;
case FORMAT_RGB: _generate_po2_mipmap<3>(r.ptr(), w.ptr(), width,height); break;
case FORMAT_RGBA: _generate_po2_mipmap<4>(r.ptr(), w.ptr(), width,height); break;
default: {}
}
}
width/=2;
height/=2;
data=new_img;
}
}
Error Image::generate_mipmaps(int p_mipmaps,bool p_keep_existing) {
if (!_can_modify(format)) {
ERR_EXPLAIN("Cannot generate mipmaps in indexed, compressed or custom image formats.");
ERR_FAIL_V(ERR_UNAVAILABLE);
}
int from_mm=1;
if (p_keep_existing) {
from_mm=mipmaps+1;
}
int size = _get_dst_image_size(width,height,format,mipmaps,p_mipmaps);
data.resize(size);
DVector<uint8_t>::Write wp=data.write();
if (nearest_power_of_2(width)==uint32_t(width) && nearest_power_of_2(height)==uint32_t(height)) {
//use fast code for powers of 2
int prev_ofs=0;
int prev_h=height;
int prev_w=width;
for(int i=1;i<mipmaps;i++) {
int ofs,w,h;
_get_mipmap_offset_and_size(i,ofs, w,h);
if (i>=from_mm) {
switch(format) {
case FORMAT_GRAYSCALE:
case FORMAT_INTENSITY: _generate_po2_mipmap<1>(&wp[prev_ofs], &wp[ofs], prev_w,prev_h); break;
case FORMAT_GRAYSCALE_ALPHA: _generate_po2_mipmap<2>(&wp[prev_ofs], &wp[ofs], prev_w,prev_h); break;
case FORMAT_RGB: _generate_po2_mipmap<3>(&wp[prev_ofs], &wp[ofs], prev_w,prev_h); break;
case FORMAT_RGBA: _generate_po2_mipmap<4>(&wp[prev_ofs], &wp[ofs], prev_w,prev_h); break;
default: {}
}
}
prev_ofs=ofs;
prev_w=w;
prev_h=h;
}
} else {
//use slow code..
//use bilinear filtered code for non powers of 2
int prev_ofs=0;
int prev_h=height;
int prev_w=width;
for(int i=1;i<mipmaps;i++) {
int ofs,w,h;
_get_mipmap_offset_and_size(i,ofs, w,h);
if (i>=from_mm) {
switch(format) {
case FORMAT_GRAYSCALE:
case FORMAT_INTENSITY: _scale_bilinear<1>(&wp[prev_ofs], &wp[ofs], prev_w,prev_h,w,h); break;
case FORMAT_GRAYSCALE_ALPHA: _scale_bilinear<2>(&wp[prev_ofs], &wp[ofs], prev_w,prev_h,w,h); break;
case FORMAT_RGB: _scale_bilinear<3>(&wp[prev_ofs], &wp[ofs], prev_w,prev_h,w,h); break;
case FORMAT_RGBA: _scale_bilinear<4>(&wp[prev_ofs], &wp[ofs], prev_w,prev_h,w,h); break;
default: {}
}
}
prev_ofs=ofs;
prev_w=w;
prev_h=h;
}
}
return OK;
}
void Image::clear_mipmaps() {
if (mipmaps==0)
return;
if (format==FORMAT_CUSTOM) {
ERR_EXPLAIN("Cannot clear mipmaps in indexed, compressed or custom image formats.");
ERR_FAIL();
}
if (empty())
return;
int ofs,w,h;
_get_mipmap_offset_and_size(1,ofs,w,h);
int palsize = get_format_pallete_size(format);
DVector<uint8_t> pallete;
ERR_FAIL_COND(ofs+palsize > data.size()); //bug?
if (palsize) {
pallete.resize(palsize);
DVector<uint8_t>::Read r = data.read();
DVector<uint8_t>::Write w = pallete.write();
copymem(&w[0],&r[data.size()-palsize],palsize);
}
data.resize(ofs+palsize);
if (palsize) {
DVector<uint8_t>::Read r = pallete.read();
DVector<uint8_t>::Write w = data.write();
copymem(&w[ofs],&r[0],palsize);
}
mipmaps=0;
}
void Image::make_normalmap(float p_height_scale) {
if (!_can_modify(format)) {
ERR_EXPLAIN("Cannot crop in indexed, compressed or custom image formats.");
ERR_FAIL();
}
ERR_FAIL_COND( empty() );
Image normalmap(width,height,0, FORMAT_RGB);
/*
for (int y=0;y<height;y++) {
for (int x=0;x<width;x++) {
float center=get_pixel(x,y).gray()/255.0;
float up=(y>0)?get_pixel(x,y-1).gray()/255.0:center;
float down=(y<(height-1))?get_pixel(x,y+1).gray()/255.0:center;
float left=(x>0)?get_pixel(x-1,y).gray()/255.0:center;
float right=(x<(width-1))?get_pixel(x+1,y).gray()/255.0:center;
// uhm, how do i do this? ....
Color result( (uint8_t)((normal.x+1.0)*127.0), (uint8_t)((normal.y+1.0)*127.0), (uint8_t)((normal.z+1.0)*127.0) );
normalmap.put_pixel( x, y, result );
}
}
*/
*this=normalmap;
}
bool Image::empty() const {
return (data.size()==0);
}
DVector<uint8_t> Image::get_data() const {
return data;
}
void Image::create(int p_width, int p_height, bool p_use_mipmaps,Format p_format) {
int mm=0;
int size = _get_dst_image_size(p_width,p_height,p_format,mm,p_use_mipmaps?-1:0);
data.resize( size );
{
DVector<uint8_t>::Write w= data.write();
zeromem(w.ptr(),size);
}
width=p_width;
height=p_height;
mipmaps=mm;
format=p_format;
}
void Image::create(int p_width, int p_height, int p_mipmaps, Format p_format, const DVector<uint8_t>& p_data) {
ERR_FAIL_INDEX(p_width-1,MAX_WIDTH);
ERR_FAIL_INDEX(p_height-1,MAX_HEIGHT);
if (p_format < FORMAT_CUSTOM) {
int mm;
int size = _get_dst_image_size(p_width,p_height,p_format,mm,p_mipmaps);
if (size!=p_data.size()) {
ERR_EXPLAIN("Expected data size of "+itos(size)+" in Image::create()");
ERR_FAIL_COND(p_data.size()!=size);
}
};
height=p_height;
width=p_width;
format=p_format;
data=p_data;
mipmaps=p_mipmaps;
}
void Image::create( const char ** p_xpm ) {
int size_width,size_height;
int pixelchars=0;
mipmaps=0;
bool has_alpha=false;
enum Status {
READING_HEADER,
READING_COLORS,
READING_PIXELS,
DONE
};
Status status = READING_HEADER;
int line=0;
HashMap<String,Color> colormap;
int colormap_size;
while (status!=DONE) {
const char * line_ptr = p_xpm[line];
switch (status) {
case READING_HEADER: {
String line_str=line_ptr;
line_str.replace("\t"," ");
size_width=line_str.get_slicec(' ',0).to_int();
size_height=line_str.get_slicec(' ',1).to_int();
colormap_size=line_str.get_slicec(' ',2).to_int();
pixelchars=line_str.get_slicec(' ',3).to_int();
ERR_FAIL_COND(colormap_size > 32766);
ERR_FAIL_COND(pixelchars > 5);
ERR_FAIL_COND(size_width > 32767);
ERR_FAIL_COND(size_height > 32767);
status=READING_COLORS;
} break;
case READING_COLORS: {
String colorstring;
for (int i=0;i<pixelchars;i++) {
colorstring+=*line_ptr;
line_ptr++;
}
//skip spaces
while (*line_ptr==' ' || *line_ptr=='\t' || *line_ptr==0) {
if (*line_ptr==0)
break;
line_ptr++;
}
if (*line_ptr=='c') {
line_ptr++;
while (*line_ptr==' ' || *line_ptr=='\t' || *line_ptr==0) {
if (*line_ptr==0)
break;
line_ptr++;
}
if (*line_ptr=='#') {
line_ptr++;
uint8_t col_r;
uint8_t col_g;
uint8_t col_b;
// uint8_t col_a=255;
for (int i=0;i<6;i++) {
char v = line_ptr[i];
if (v>='0' && v<='9')
v-='0';
else if (v>='A' && v<='F')
v=(v-'A')+10;
else if (v>='a' && v<='f')
v=(v-'a')+10;
else
break;
switch(i) {
case 0: col_r=v<<4; break;
case 1: col_r|=v; break;
case 2: col_g=v<<4; break;
case 3: col_g|=v; break;
case 4: col_b=v<<4; break;
case 5: col_b|=v; break;
};
}
// magenta mask
if (col_r==255 && col_g==0 && col_b==255) {
colormap[colorstring]=Color(0,0,0,0);
has_alpha=true;
} else {
colormap[colorstring]=Color(col_r/255.0,col_g/255.0,col_b/255.0,1.0);
}
}
}
if (line==colormap_size) {
status=READING_PIXELS;
create(size_width,size_height,0,has_alpha?FORMAT_RGBA:FORMAT_RGB);
}
} break;
case READING_PIXELS: {
int y=line-colormap_size-1;
for (int x=0;x<size_width;x++) {
char pixelstr[6]={0,0,0,0,0,0};
for (int i=0;i<pixelchars;i++)
pixelstr[i]=line_ptr[x*pixelchars+i];
Color *colorptr = colormap.getptr(pixelstr);
ERR_FAIL_COND(!colorptr);
put_pixel(x,y,*colorptr);
}
if (y==(size_height-1))
status=DONE;
} break;
default:{}
}
line++;
}
}
#define DETECT_ALPHA_MAX_TRESHOLD 254
#define DETECT_ALPHA_MIN_TRESHOLD 2
#define DETECT_ALPHA( m_value )\
{ \
uint8_t value=m_value;\
if (value<DETECT_ALPHA_MIN_TRESHOLD)\
bit=true;\
else if (value<DETECT_ALPHA_MAX_TRESHOLD) {\
\
detected=true;\
break;\
}\
}
#define DETECT_NON_ALPHA( m_value )\
{ \
uint8_t value=m_value;\
if (value>0) {\
\
detected=true;\
break;\
}\
}
bool Image::is_invisible() const {
if (format==FORMAT_GRAYSCALE ||
format==FORMAT_RGB ||
format==FORMAT_INDEXED)
return false;
int len = data.size();
if (len==0)
return true;
if (format >= FORMAT_YUV_422 && format <= FORMAT_YUV_444)
return false;
int w,h;
_get_mipmap_offset_and_size(1,len,w,h);
DVector<uint8_t>::Read r = data.read();
const unsigned char *data_ptr=r.ptr();
bool detected=false;
switch(format) {
case FORMAT_INTENSITY: {
for(int i=0;i<len;i++) {
DETECT_NON_ALPHA(data_ptr[i]);
}
} break;
case FORMAT_GRAYSCALE_ALPHA: {
for(int i=0;i<(len>>1);i++) {
DETECT_NON_ALPHA(data_ptr[(i<<1)+1]);
}
} break;
case FORMAT_RGBA: {
for(int i=0;i<(len>>2);i++) {
DETECT_NON_ALPHA(data_ptr[(i<<2)+3])
}
} break;
case FORMAT_INDEXED: {
return false;
} break;
case FORMAT_INDEXED_ALPHA: {
return false;
} break;
case FORMAT_PVRTC2_ALPHA:
case FORMAT_PVRTC4_ALPHA:
case FORMAT_BC2:
case FORMAT_BC3: {
detected=true;
} break;
default: {}
}
return !detected;
}
Image::AlphaMode Image::detect_alpha() const {
if (format==FORMAT_GRAYSCALE ||
format==FORMAT_RGB ||
format==FORMAT_INDEXED)
return ALPHA_NONE;
int len = data.size();
if (len==0)
return ALPHA_NONE;
if (format >= FORMAT_YUV_422 && format <= FORMAT_YUV_444)
return ALPHA_NONE;
int w,h;
_get_mipmap_offset_and_size(1,len,w,h);
DVector<uint8_t>::Read r = data.read();
const unsigned char *data_ptr=r.ptr();
bool bit=false;
bool detected=false;
switch(format) {
case FORMAT_INTENSITY: {
for(int i=0;i<len;i++) {
DETECT_ALPHA(data_ptr[i]);
}
} break;
case FORMAT_GRAYSCALE_ALPHA: {
for(int i=0;i<(len>>1);i++) {
DETECT_ALPHA(data_ptr[(i<<1)+1]);
}
} break;
case FORMAT_RGBA: {
for(int i=0;i<(len>>2);i++) {
DETECT_ALPHA(data_ptr[(i<<2)+3])
}
} break;
case FORMAT_INDEXED: {
return ALPHA_NONE;
} break;
case FORMAT_INDEXED_ALPHA: {
return ALPHA_BLEND;
} break;
case FORMAT_PVRTC2_ALPHA:
case FORMAT_PVRTC4_ALPHA:
case FORMAT_BC2:
case FORMAT_BC3: {
detected=true;
} break;
default: {}
}
if (detected)
return ALPHA_BLEND;
else if (bit)
return ALPHA_BIT;
else
return ALPHA_NONE;
}
Error Image::load(const String& p_path) {
return ImageLoader::load_image(p_path, this);
}
Error Image::save_png(const String& p_path) {
if (save_png_func == NULL)
return ERR_UNAVAILABLE;
return save_png_func(p_path, *this);
};
bool Image::operator==(const Image& p_image) const {
if (data.size() == 0 && p_image.data.size() == 0)
return true;
DVector<uint8_t>::Read r = data.read();
DVector<uint8_t>::Read pr = p_image.data.read();
return r.ptr() == pr.ptr();
}
int Image::get_format_pixel_size(Format p_format) {
switch(p_format) {
case FORMAT_GRAYSCALE: {
return 1;
} break;
case FORMAT_INTENSITY: {
return 1;
} break;
case FORMAT_GRAYSCALE_ALPHA: {
return 2;
} break;
case FORMAT_RGB: {
return 3;
} break;
case FORMAT_RGBA: {
return 4;
} break;
case FORMAT_INDEXED: {
return 1;
} break;
case FORMAT_INDEXED_ALPHA: {
return 1;
} break;
case FORMAT_BC1:
case FORMAT_BC2:
case FORMAT_BC3:
case FORMAT_BC4:
case FORMAT_BC5: {
return 1;
} break;
case FORMAT_PVRTC2:
case FORMAT_PVRTC2_ALPHA: {
return 1;
} break;
case FORMAT_PVRTC4:
case FORMAT_PVRTC4_ALPHA: {
return 1;
} break;
case FORMAT_ATC:
case FORMAT_ATC_ALPHA_EXPLICIT:
case FORMAT_ATC_ALPHA_INTERPOLATED: {
return 1;
} break;
case FORMAT_ETC: {
return 1;
} break;
case FORMAT_YUV_422: {
return 2;
};
case FORMAT_YUV_444: {
return 3;
} break;
case FORMAT_CUSTOM: {
ERR_EXPLAIN("pixel size requested for custom image format, and it's unknown obviously");
ERR_FAIL_V(1);
} break;
default:{
ERR_EXPLAIN("Cannot obtain pixel size from this format");
ERR_FAIL_V(1);
}
}
return 0;
}
int Image::get_image_data_size(int p_width, int p_height, Format p_format,int p_mipmaps) {
int mm;
return _get_dst_image_size(p_width,p_height,p_format,mm,p_mipmaps);
}
int Image::get_image_required_mipmaps(int p_width, int p_height, Format p_format) {
int mm;
_get_dst_image_size(p_width,p_height,p_format,mm,-1);
return mm;
}
void Image::_get_format_min_data_size(Format p_format,int &r_w, int &r_h) {
switch(p_format) {
case FORMAT_BC1:
case FORMAT_BC2:
case FORMAT_BC3:
case FORMAT_BC4:
case FORMAT_BC5: {
r_w=4;
r_h=4;
} break;
case FORMAT_PVRTC2:
case FORMAT_PVRTC2_ALPHA: {
r_w=16;
r_h=8;
} break;
case FORMAT_PVRTC4_ALPHA:
case FORMAT_PVRTC4: {
r_w=8;
r_h=8;
} break;
case FORMAT_ATC:
case FORMAT_ATC_ALPHA_EXPLICIT:
case FORMAT_ATC_ALPHA_INTERPOLATED: {
r_w=8;
r_h=8;
} break;
case FORMAT_ETC: {
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_BC1 || p_format==FORMAT_BC4 || p_format==FORMAT_ATC || p_format==FORMAT_PVRTC4 || p_format==FORMAT_PVRTC4_ALPHA || p_format==FORMAT_ETC)
return 1;
else if (p_format==FORMAT_PVRTC2 || p_format==FORMAT_PVRTC2_ALPHA)
return 2;
else
return 0;
}
int Image::get_format_pallete_size(Format p_format) {
switch(p_format) {
case FORMAT_GRAYSCALE: {
return 0;
} break;
case FORMAT_INTENSITY: {
return 0;
} break;
case FORMAT_GRAYSCALE_ALPHA: {
return 0;
} break;
case FORMAT_RGB: {
return 0;
} break;
case FORMAT_RGBA: {
return 0;
} break;
case FORMAT_INDEXED: {
return 3*256;
} break;
case FORMAT_INDEXED_ALPHA: {
return 4*256;
} break;
default:{}
}
return 0;
}
Error Image::_decompress_bc() {
print_line("decompressing bc");
int mm;
int size = _get_dst_image_size(width,height,FORMAT_RGBA,mm,mipmaps);
DVector<uint8_t> newdata;
newdata.resize(size);
DVector<uint8_t>::Write w = newdata.write();
DVector<uint8_t>::Read r = data.read();
int rofs=0;
int wofs=0;
int wd=width,ht=height;
for(int i=0;i<=mm;i++) {
switch(format) {
case FORMAT_BC1: {
int len = (wd*ht)/16;
uint8_t* dst=&w[wofs];
uint32_t ofs_table[16];
for(int x=0;x<4;x++) {
for(int y=0;y<4;y++) {
ofs_table[15-(y*4+(3-x))]=(x+y*wd)*4;
}
}
for(int j=0;j<len;j++) {
const uint8_t* src=&r[rofs+j*8];
uint16_t col_a=src[1];
col_a<<=8;
col_a|=src[0];
uint16_t col_b=src[3];
col_b<<=8;
col_b|=src[2];
uint8_t table[4][4]={
{ (col_a>>11)<<3, ((col_a>>5)&0x3f)<<2, ((col_a)&0x1f)<<3, 255 },
{ (col_b>>11)<<3, ((col_b>>5)&0x3f)<<2, ((col_b)&0x1f)<<3, 255 },
{0,0,0,255},
{0,0,0,255}
};
if (col_a<col_b) {
//punchrough
table[2][0]=(int(table[0][0])+int(table[1][0]))>>1;
table[2][1]=(int(table[0][1])+int(table[1][1]))>>1;
table[2][2]=(int(table[0][2])+int(table[1][2]))>>1;
table[3][3]=0; //premul alpha black
} else {
//gradient
table[2][0]=(int(table[0][0])*2+int(table[1][0]))/3;
table[2][1]=(int(table[0][1])*2+int(table[1][1]))/3;
table[2][2]=(int(table[0][2])*2+int(table[1][2]))/3;
table[3][0]=(int(table[0][0])+int(table[1][0])*2)/3;
table[3][1]=(int(table[0][1])+int(table[1][1])*2)/3;
table[3][2]=(int(table[0][2])+int(table[1][2])*2)/3;
}
uint32_t block=src[4];
block<<=8;
block|=src[5];
block<<=8;
block|=src[6];
block<<=8;
block|=src[7];
int y = (j/(wd/4))*4;
int x = (j%(wd/4))*4;
int pixofs = (y*wd+x)*4;
for(int k=0;k<16;k++) {
int idx = pixofs+ofs_table[k];
dst[idx+0]=table[block&0x3][0];
dst[idx+1]=table[block&0x3][1];
dst[idx+2]=table[block&0x3][2];
dst[idx+3]=table[block&0x3][3];
block>>=2;
}
}
rofs+=len*8;
wofs+=wd*ht*4;
wd/=2;
ht/=2;
} break;
case FORMAT_BC2: {
int len = (wd*ht)/16;
uint8_t* dst=&w[wofs];
uint32_t ofs_table[16];
for(int x=0;x<4;x++) {
for(int y=0;y<4;y++) {
ofs_table[15-(y*4+(3-x))]=(x+y*wd)*4;
}
}
for(int j=0;j<len;j++) {
const uint8_t* src=&r[rofs+j*16];
uint64_t ablock=src[1];
ablock<<=8;
ablock|=src[0];
ablock<<=8;
ablock|=src[3];
ablock<<=8;
ablock|=src[2];
ablock<<=8;
ablock|=src[5];
ablock<<=8;
ablock|=src[4];
ablock<<=8;
ablock|=src[7];
ablock<<=8;
ablock|=src[6];
uint16_t col_a=src[8+1];
col_a<<=8;
col_a|=src[8+0];
uint16_t col_b=src[8+3];
col_b<<=8;
col_b|=src[8+2];
uint8_t table[4][4]={
{ (col_a>>11)<<3, ((col_a>>5)&0x3f)<<2, ((col_a)&0x1f)<<3, 255 },
{ (col_b>>11)<<3, ((col_b>>5)&0x3f)<<2, ((col_b)&0x1f)<<3, 255 },
{0,0,0,255},
{0,0,0,255}
};
//always gradient
table[2][0]=(int(table[0][0])*2+int(table[1][0]))/3;
table[2][1]=(int(table[0][1])*2+int(table[1][1]))/3;
table[2][2]=(int(table[0][2])*2+int(table[1][2]))/3;
table[3][0]=(int(table[0][0])+int(table[1][0])*2)/3;
table[3][1]=(int(table[0][1])+int(table[1][1])*2)/3;
table[3][2]=(int(table[0][2])+int(table[1][2])*2)/3;
uint32_t block=src[4+8];
block<<=8;
block|=src[5+8];
block<<=8;
block|=src[6+8];
block<<=8;
block|=src[7+8];
int y = (j/(wd/4))*4;
int x = (j%(wd/4))*4;
int pixofs = (y*wd+x)*4;
for(int k=0;k<16;k++) {
uint8_t alpha = ablock&0xf;
alpha=int(alpha)*255/15; //right way for alpha
int idx = pixofs+ofs_table[k];
dst[idx+0]=table[block&0x3][0];
dst[idx+1]=table[block&0x3][1];
dst[idx+2]=table[block&0x3][2];
dst[idx+3]=alpha;
block>>=2;
ablock>>=4;
}
}
rofs+=len*16;
wofs+=wd*ht*4;
wd/=2;
ht/=2;
} break;
case FORMAT_BC3: {
int len = (wd*ht)/16;
uint8_t* dst=&w[wofs];
uint32_t ofs_table[16];
for(int x=0;x<4;x++) {
for(int y=0;y<4;y++) {
ofs_table[15-(y*4+(3-x))]=(x+y*wd)*4;
}
}
for(int j=0;j<len;j++) {
const uint8_t* src=&r[rofs+j*16];
uint8_t a_start=src[1];
uint8_t a_end=src[0];
uint64_t ablock=src[3];
ablock<<=8;
ablock|=src[2];
ablock<<=8;
ablock|=src[5];
ablock<<=8;
ablock|=src[4];
ablock<<=8;
ablock|=src[7];
ablock<<=8;
ablock|=src[6];
uint8_t atable[8];
if (a_start>a_end) {
atable[0]=(int(a_start)*7+int(a_end)*0)/7;
atable[1]=(int(a_start)*6+int(a_end)*1)/7;
atable[2]=(int(a_start)*5+int(a_end)*2)/7;
atable[3]=(int(a_start)*4+int(a_end)*3)/7;
atable[4]=(int(a_start)*3+int(a_end)*4)/7;
atable[5]=(int(a_start)*2+int(a_end)*5)/7;
atable[6]=(int(a_start)*1+int(a_end)*6)/7;
atable[7]=(int(a_start)*0+int(a_end)*7)/7;
} else {
atable[0]=(int(a_start)*5+int(a_end)*0)/5;
atable[1]=(int(a_start)*4+int(a_end)*1)/5;
atable[2]=(int(a_start)*3+int(a_end)*2)/5;
atable[3]=(int(a_start)*2+int(a_end)*3)/5;
atable[4]=(int(a_start)*1+int(a_end)*4)/5;
atable[5]=(int(a_start)*0+int(a_end)*5)/5;
atable[6]=0;
atable[7]=255;
}
uint16_t col_a=src[8+1];
col_a<<=8;
col_a|=src[8+0];
uint16_t col_b=src[8+3];
col_b<<=8;
col_b|=src[8+2];
uint8_t table[4][4]={
{ (col_a>>11)<<3, ((col_a>>5)&0x3f)<<2, ((col_a)&0x1f)<<3, 255 },
{ (col_b>>11)<<3, ((col_b>>5)&0x3f)<<2, ((col_b)&0x1f)<<3, 255 },
{0,0,0,255},
{0,0,0,255}
};
//always gradient
table[2][0]=(int(table[0][0])*2+int(table[1][0]))/3;
table[2][1]=(int(table[0][1])*2+int(table[1][1]))/3;
table[2][2]=(int(table[0][2])*2+int(table[1][2]))/3;
table[3][0]=(int(table[0][0])+int(table[1][0])*2)/3;
table[3][1]=(int(table[0][1])+int(table[1][1])*2)/3;
table[3][2]=(int(table[0][2])+int(table[1][2])*2)/3;
uint32_t block=src[4+8];
block<<=8;
block|=src[5+8];
block<<=8;
block|=src[6+8];
block<<=8;
block|=src[7+8];
int y = (j/(wd/4))*4;
int x = (j%(wd/4))*4;
int pixofs = (y*wd+x)*4;
for(int k=0;k<16;k++) {
uint8_t alpha = ablock&0x7;
int idx = pixofs+ofs_table[k];
dst[idx+0]=table[block&0x3][0];
dst[idx+1]=table[block&0x3][1];
dst[idx+2]=table[block&0x3][2];
dst[idx+3]=atable[alpha];
block>>=2;
ablock>>=3;
}
}
rofs+=len*16;
wofs+=wd*ht*4;
wd/=2;
ht/=2;
} break;
}
}
w=DVector<uint8_t>::Write();
r=DVector<uint8_t>::Read();
data=newdata;
format=FORMAT_RGBA;
return OK;
}
bool Image::is_compressed() const {
return format>=FORMAT_BC1;
}
Image Image::decompressed() const {
Image img=*this;
img.decompress();
return img;
}
Error Image::decompress() {
if (format>=FORMAT_BC1 && format<=FORMAT_BC5 )
_decompress_bc();//_image_decompress_bc(this);
else if (format>=FORMAT_PVRTC2 && format<=FORMAT_PVRTC4_ALPHA && _image_decompress_pvrtc)
_image_decompress_pvrtc(this);
else if (format==FORMAT_ETC && _image_decompress_etc)
_image_decompress_etc(this);
else
return ERR_UNAVAILABLE;
return OK;
}
Error Image::compress(CompressMode p_mode) {
switch(p_mode) {
case COMPRESS_BC: {
ERR_FAIL_COND_V(!_image_compress_bc_func, ERR_UNAVAILABLE);
_image_compress_bc_func(this);
} break;
case COMPRESS_PVRTC2: {
ERR_FAIL_COND_V(!_image_compress_pvrtc2_func, ERR_UNAVAILABLE);
_image_compress_pvrtc2_func(this);
} break;
case COMPRESS_PVRTC4: {
ERR_FAIL_COND_V(!_image_compress_pvrtc4_func, ERR_UNAVAILABLE);
_image_compress_pvrtc4_func(this);
} break;
case COMPRESS_ETC: {
ERR_FAIL_COND_V(!_image_compress_etc_func, ERR_UNAVAILABLE);
_image_compress_etc_func(this);
} break;
}
return OK;
}
Image Image::compressed(int p_mode) {
Image ret = *this;
ret.compress((Image::CompressMode)p_mode);
return ret;
};
Image::Image(const char **p_xpm) {
width=0;
height=0;
mipmaps=0;
format=FORMAT_GRAYSCALE;
create(p_xpm);
}
Image::Image(int p_width, int p_height,bool p_use_mipmaps, Format p_format) {
width=0;
height=0;
mipmaps=0;
format=FORMAT_GRAYSCALE;
create(p_width,p_height,p_use_mipmaps,p_format);
}
Image::Image(int p_width, int p_height, int p_mipmaps, Format p_format, const DVector<uint8_t>& p_data) {
width=0;
height=0;
mipmaps=0;
format=FORMAT_GRAYSCALE;
create(p_width,p_height,p_mipmaps,p_format,p_data);
}
Image Image::brushed(const Image& p_src, const Image& p_brush, const Point2& p_dest) const {
Image img = *this;
img.brush_transfer(p_src,p_brush,p_dest);
return img;
}
Rect2 Image::get_used_rect() const {
if (format==FORMAT_GRAYSCALE ||
format==FORMAT_RGB ||
format==FORMAT_INDEXED || format>FORMAT_INDEXED_ALPHA)
return Rect2(Point2(),Size2(width,height));
int len = data.size();
if (len==0)
return Rect2();
int data_size = len;
DVector<uint8_t>::Read r = data.read();
const unsigned char *rptr=r.ptr();
int minx=0xFFFFFF,miny=0xFFFFFFF;
int maxx=-1,maxy=-1;
for(int i=0;i<width;i++) {
for(int j=0;j<height;j++) {
bool opaque = _get_pixel(i,j,rptr,data_size).a>2;
if (!opaque)
continue;
if (i>maxx)
maxx=i;
if (j>maxy)
maxy=j;
if (i<minx)
minx=i;
if (j<miny)
miny=j;
}
}
if (maxx==-1)
return Rect2();
else
return Rect2(minx,miny,maxx-minx+1,maxy-miny+1);
}
Image Image::get_rect(const Rect2& p_area) const {
Image img(p_area.size.x, p_area.size.y, mipmaps, format);
img.blit_rect(*this, p_area, Point2(0, 0));
return img;
};
void Image::brush_transfer(const Image& p_src, const Image& p_brush, const Point2& p_dest) {
ERR_FAIL_COND( width != p_src.width || height !=p_src.height);
int dst_data_size = data.size();
DVector<uint8_t>::Write wp = data.write();
unsigned char *dst_data_ptr=wp.ptr();
int src_data_size = p_src.data.size();
DVector<uint8_t>::Read rp = p_src.data.read();
const unsigned char *src_data_ptr=rp.ptr();
int brush_data_size = p_brush.data.size();
DVector<uint8_t>::Read bp = p_brush.data.read();
const unsigned char *src_brush_ptr=bp.ptr();
int bw = p_brush.get_width();
int bh = p_brush.get_height();
int dx=p_dest.x;
int dy=p_dest.y;
for(int i=dy;i<dy+bh;i++) {
if (i<0 || i >= height)
continue;
for(int j=dx;j<dx+bw;j++) {
if (j<0 || j>=width)
continue;
BColor src = p_src._get_pixel(j,i,src_data_ptr,src_data_size);
BColor dst = _get_pixel(j,i,dst_data_ptr,dst_data_size);
BColor brush = p_brush._get_pixel(j-dx,i-dy,src_brush_ptr,brush_data_size);
uint32_t mult = brush.r;
dst.r = dst.r + (((int32_t(src.r)-int32_t(dst.r))*mult)>>8);
dst.g = dst.g + (((int32_t(src.g)-int32_t(dst.g))*mult)>>8);
dst.b = dst.b + (((int32_t(src.b)-int32_t(dst.b))*mult)>>8);
dst.a = dst.a + (((int32_t(src.a)-int32_t(dst.a))*mult)>>8);
_put_pixel(j,i,dst,dst_data_ptr);
}
}
}
void Image::blit_rect(const Image& p_src, const Rect2& p_src_rect,const Point2& p_dest) {
int dsize=data.size();
int srcdsize=p_src.data.size();
ERR_FAIL_COND( dsize==0 );
ERR_FAIL_COND( srcdsize==0 );
Rect2 rrect = Rect2(0,0,p_src.width,p_src.height).clip(p_src_rect);
DVector<uint8_t>::Write wp = data.write();
unsigned char *dst_data_ptr=wp.ptr();
DVector<uint8_t>::Read rp = p_src.data.read();
const unsigned char *src_data_ptr=rp.ptr();
if ((format==FORMAT_INDEXED || format == FORMAT_INDEXED_ALPHA) && (p_src.format==FORMAT_INDEXED || p_src.format == FORMAT_INDEXED_ALPHA)) {
Point2i desti(p_dest.x, p_dest.y);
Point2i srci(rrect.pos.x, rrect.pos.y);
for(int i=0;i<rrect.size.y;i++) {
if (i<0 || i >= height)
continue;
for(int j=0;j<rrect.size.x;j++) {
if (j<0 || j>=width)
continue;
dst_data_ptr[width * (desti.y + i) + desti.x + j] = src_data_ptr[p_src.width * (srci.y+i) + srci.x+j];
}
}
} else {
for(int i=0;i<rrect.size.y;i++) {
if (i<0 || i >= height)
continue;
for(int j=0;j<rrect.size.x;j++) {
if (j<0 || j>=width)
continue;
_put_pixel(p_dest.x+j,p_dest.y+i,p_src._get_pixel(rrect.pos.x+j,rrect.pos.y+i,src_data_ptr,srcdsize),dst_data_ptr);
}
}
}
}
Image (*Image::_png_mem_loader_func)(const uint8_t*,int)=NULL;
void (*Image::_image_compress_bc_func)(Image *)=NULL;
void (*Image::_image_compress_pvrtc2_func)(Image *)=NULL;
void (*Image::_image_compress_pvrtc4_func)(Image *)=NULL;
void (*Image::_image_compress_etc_func)(Image *)=NULL;
void (*Image::_image_decompress_pvrtc)(Image *)=NULL;
void (*Image::_image_decompress_bc)(Image *)=NULL;
void (*Image::_image_decompress_etc)(Image *)=NULL;
DVector<uint8_t> (*Image::lossy_packer)(const Image& ,float )=NULL;
Image (*Image::lossy_unpacker)(const DVector<uint8_t>& )=NULL;
DVector<uint8_t> (*Image::lossless_packer)(const Image& )=NULL;
Image (*Image::lossless_unpacker)(const DVector<uint8_t>& )=NULL;
void Image::set_compress_bc_func(void (*p_compress_func)(Image *)) {
_image_compress_bc_func=p_compress_func;
}
void Image::normalmap_to_xy() {
convert(Image::FORMAT_RGBA);
{
int len = data.size()/4;
DVector<uint8_t>::Write wp = data.write();
unsigned char *data_ptr=wp.ptr();
for(int i=0;i<len;i++) {
data_ptr[(i<<2)+3]=data_ptr[(i<<2)+0]; //x to w
data_ptr[(i<<2)+0]=data_ptr[(i<<2)+1]; //y to xz
data_ptr[(i<<2)+2]=data_ptr[(i<<2)+1];
}
}
convert(Image::FORMAT_GRAYSCALE_ALPHA);
}
void Image::srgb_to_linear() {
if (data.size()==0)
return;
static const uint8_t srgb2lin[256]={0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 22, 22, 23, 23, 24, 24, 25, 26, 26, 27, 27, 28, 29, 29, 30, 31, 31, 32, 33, 33, 34, 35, 36, 36, 37, 38, 38, 39, 40, 41, 42, 42, 43, 44, 45, 46, 47, 47, 48, 49, 50, 51, 52, 53, 54, 55, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 70, 71, 72, 73, 74, 75, 76, 77, 78, 80, 81, 82, 83, 84, 85, 87, 88, 89, 90, 92, 93, 94, 95, 97, 98, 99, 101, 102, 103, 105, 106, 107, 109, 110, 112, 113, 114, 116, 117, 119, 120, 122, 123, 125, 126, 128, 129, 131, 132, 134, 135, 137, 139, 140, 142, 144, 145, 147, 148, 150, 152, 153, 155, 157, 159, 160, 162, 164, 166, 167, 169, 171, 173, 175, 176, 178, 180, 182, 184, 186, 188, 190, 192, 193, 195, 197, 199, 201, 203, 205, 207, 209, 211, 213, 215, 218, 220, 222, 224, 226, 228, 230, 232, 235, 237, 239, 241, 243, 245, 248, 250, 252};
ERR_FAIL_COND( format!=FORMAT_RGB && format!=FORMAT_RGBA );
if (format==FORMAT_RGBA) {
int len = data.size()/4;
DVector<uint8_t>::Write wp = data.write();
unsigned char *data_ptr=wp.ptr();
for(int i=0;i<len;i++) {
data_ptr[(i<<2)+0]=srgb2lin[ data_ptr[(i<<2)+0] ];
data_ptr[(i<<2)+1]=srgb2lin[ data_ptr[(i<<2)+1] ];
data_ptr[(i<<2)+2]=srgb2lin[ data_ptr[(i<<2)+2] ];
}
} else if (format==FORMAT_RGB) {
int len = data.size()/3;
DVector<uint8_t>::Write wp = data.write();
unsigned char *data_ptr=wp.ptr();
for(int i=0;i<len;i++) {
data_ptr[(i*3)+0]=srgb2lin[ data_ptr[(i*3)+0] ];
data_ptr[(i*3)+1]=srgb2lin[ data_ptr[(i*3)+1] ];
data_ptr[(i*3)+2]=srgb2lin[ data_ptr[(i*3)+2] ];
}
}
}
void Image::premultiply_alpha() {
if (data.size()==0)
return;
if (format!=FORMAT_RGBA)
return; //not needed
DVector<uint8_t>::Write wp = data.write();
unsigned char *data_ptr=wp.ptr();
for(int i=0;i<height;i++) {
for(int j=0;j<width;j++) {
BColor bc = _get_pixel(j,i,data_ptr,0);
bc.r=(int(bc.r)*int(bc.a))>>8;
bc.g=(int(bc.g)*int(bc.a))>>8;
bc.b=(int(bc.b)*int(bc.a))>>8;
_put_pixel(j,i,bc,data_ptr);
}
}
}
void Image::fix_alpha_edges() {
if (data.size()==0)
return;
if (format!=FORMAT_RGBA)
return; //not needed
DVector<uint8_t> dcopy = data;
DVector<uint8_t>::Read rp = data.read();
const uint8_t *rptr=rp.ptr();
DVector<uint8_t>::Write wp = data.write();
unsigned char *data_ptr=wp.ptr();
const int max_radius=4;
const int alpha_treshold=20;
const int max_dist=0x7FFFFFFF;
for(int i=0;i<height;i++) {
for(int j=0;j<width;j++) {
BColor bc = _get_pixel(j,i,rptr,0);
if (bc.a>=alpha_treshold)
continue;
int closest_dist=max_dist;
BColor closest_color;
closest_color.a=bc.a;
int from_x = MAX(0,j-max_radius);
int to_x = MIN(width-1,j+max_radius);
int from_y = MAX(0,i-max_radius);
int to_y = MIN(height-1,i+max_radius);
for(int k=from_y;k<=to_y;k++) {
for(int l=from_x;l<=to_x;l++) {
int dy = i-k;
int dx = j-l;
int dist = dy*dy+dx*dx;
if (dist>=closest_dist)
continue;
const uint8_t * rp = &rptr[(k*width+l)<<2];
if (rp[3]<alpha_treshold)
continue;
closest_dist=dist;
closest_color.r=rp[0];
closest_color.g=rp[1];
closest_color.b=rp[2];
}
}
if (closest_dist!=max_dist)
_put_pixel(j,i,closest_color,data_ptr);
}
}
}
String Image::get_format_name(Format p_format) {
ERR_FAIL_INDEX_V(p_format,FORMAT_MAX,String());
return format_names[p_format];
}
Image::Image(const uint8_t* p_png,int p_len) {
width=0;
height=0;
mipmaps=0;
format=FORMAT_GRAYSCALE;
if (_png_mem_loader_func) {
*this = _png_mem_loader_func(p_png,p_len);
}
}
Image::Image() {
width=0;
height=0;
mipmaps=0;
format = FORMAT_GRAYSCALE;
}
Image::~Image() {
}
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