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/* Aseprite
* Copyright (C) 2001-2013 David Capello
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ico.c - Based on the code of Elias Pschernig.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "app/document.h"
#include "app/file/file.h"
#include "app/file/file_format.h"
#include "app/file/format_options.h"
#include "base/cfile.h"
#include "base/file_handle.h"
#include "raster/raster.h"
#include <allegro/color.h>
namespace app {
using namespace base;
class IcoFormat : public FileFormat {
const char* onGetName() const { return "ico"; }
const char* onGetExtensions() const { return "ico"; }
int onGetFlags() const {
return
FILE_SUPPORT_LOAD |
FILE_SUPPORT_SAVE |
FILE_SUPPORT_RGB |
FILE_SUPPORT_GRAY |
FILE_SUPPORT_INDEXED;
}
bool onLoad(FileOp* fop) override;
#ifdef ENABLE_SAVE
bool onSave(FileOp* fop) override;
#endif
};
FileFormat* CreateIcoFormat()
{
return new IcoFormat;
}
struct ICONDIR {
uint16_t reserved;
uint16_t type;
uint16_t entries;
};
struct ICONDIRENTRY {
uint8_t width;
uint8_t height;
uint8_t color_count;
uint8_t reserved;
uint16_t planes;
uint16_t bpp;
uint32_t image_size;
uint32_t image_offset;
};
struct BITMAPINFOHEADER {
uint32_t size;
uint32_t width;
uint32_t height;
uint16_t planes;
uint16_t bpp;
uint32_t compression;
uint32_t imageSize;
uint32_t xPelsPerMeter;
uint32_t yPelsPerMeter;
uint32_t clrUsed;
uint32_t clrImportant;
};
bool IcoFormat::onLoad(FileOp* fop)
{
FileHandle f(open_file_with_exception(fop->filename, "rb"));
// Read the icon header
ICONDIR header;
header.reserved = fgetw(f); // Reserved
header.type = fgetw(f); // Resource type: 1=ICON
header.entries = fgetw(f); // Number of icons
if (header.type != 1) {
fop_error(fop, "Invalid ICO file type.\n");
return false;
}
if (header.entries < 1) {
fop_error(fop, "This ICO files does not contain images.\n");
return false;
}
// Read all entries
std::vector<ICONDIRENTRY> entries;
entries.reserve(header.entries);
for (uint16_t n=0; n<header.entries; ++n) {
ICONDIRENTRY entry;
entry.width = fgetc(f); // width
entry.height = fgetc(f); // height
entry.color_count = fgetc(f); // color count
entry.reserved = fgetc(f); // reserved
entry.planes = fgetw(f); // color planes
entry.bpp = fgetw(f); // bits per pixel
entry.image_size = fgetl(f); // size in bytes of image data
entry.image_offset = fgetl(f); // file offset to image data
entries.push_back(entry);
}
// Read the first entry
const ICONDIRENTRY& entry = entries[0];
int width = (entry.width == 0 ? 256: entry.width);
int height = (entry.height == 0 ? 256: entry.height);
int numcolors = (entry.color_count == 0 ? 256: entry.color_count);
PixelFormat pixelFormat = IMAGE_INDEXED;
if (entry.bpp > 8)
pixelFormat = IMAGE_RGB;
// Create the sprite with one background layer
Sprite* sprite = new Sprite(pixelFormat, width, height, numcolors);
LayerImage* layer = new LayerImage(sprite);
sprite->folder()->addLayer(layer);
// Create the first image/cel
Image* image = Image::create(pixelFormat, width, height);
int image_index = sprite->stock()->addImage(image);
Cel* cel = new Cel(FrameNumber(0), image_index);
layer->addCel(cel);
clear_image(image, 0);
// Go to the entry start in the file
fseek(f, entry.image_offset, SEEK_SET);
// Read BITMAPINFOHEADER
BITMAPINFOHEADER bmpHeader;
bmpHeader.size = fgetl(f);
bmpHeader.width = fgetl(f);
bmpHeader.height = fgetl(f); // XOR height + AND height
bmpHeader.planes = fgetw(f);
bmpHeader.bpp = fgetw(f);
bmpHeader.compression = fgetl(f); // unused in .ico files
bmpHeader.imageSize = fgetl(f);
bmpHeader.xPelsPerMeter = fgetl(f); // unused for ico
bmpHeader.yPelsPerMeter = fgetl(f); // unused for ico
bmpHeader.clrUsed = fgetl(f); // unused for ico
bmpHeader.clrImportant = fgetl(f); // unused for ico
// Read the palette
if (entry.bpp <= 8) {
Palette* pal = new Palette(FrameNumber(0), numcolors);
for (int i=0; i<numcolors; ++i) {
int b = fgetc(f);
int g = fgetc(f);
int r = fgetc(f);
fgetc(f);
pal->setEntry(i, rgba(r, g, b, 255));
}
sprite->setPalette(pal, true);
delete pal;
}
// Read XOR MASK
int x, y, c, r, g, b;
for (y=image->height()-1; y>=0; --y) {
for (x=0; x<image->width(); ++x) {
switch (entry.bpp) {
case 8:
c = fgetc(f);
ASSERT(c >= 0 && c < numcolors);
if (c >= 0 && c < numcolors)
put_pixel(image, x, y, c);
else
put_pixel(image, x, y, 0);
break;
case 24:
b = fgetc(f);
g = fgetc(f);
r = fgetc(f);
put_pixel(image, x, y, rgba(r, g, b, 255));
break;
}
}
// every scanline must be 32-bit aligned
while (x & 3) {
fgetc(f);
x++;
}
}
// AND mask
int m, v;
for (y=image->height()-1; y>=0; --y) {
for (x=0; x<(image->width()+7)/8; ++x) {
m = fgetc(f);
v = 128;
for (b=0; b<8; b++) {
if ((m & v) == v)
put_pixel(image, x*8+b, y, 0); // TODO mask color
v >>= 1;
}
}
// every scanline must be 32-bit aligned
while (x & 3) {
fgetc(f);
x++;
}
}
fop->createDocument(sprite);
return true;
}
#ifdef ENABLE_SAVE
bool IcoFormat::onSave(FileOp* fop)
{
Sprite* sprite = fop->document->sprite();
int bpp, bw, bitsw;
int size, offset, i;
int c, x, y, b, m, v;
FrameNumber n, num = sprite->totalFrames();
FileHandle f(open_file_with_exception(fop->filename, "wb"));
offset = 6 + num*16; // ICONDIR + ICONDIRENTRYs
// Icon directory
fputw(0, f); // reserved
fputw(1, f); // resource type: 1=ICON
fputw(num, f); // number of icons
// Entries
for (n=FrameNumber(0); n<num; ++n) {
bpp = (sprite->pixelFormat() == IMAGE_INDEXED) ? 8 : 24;
bw = (((sprite->width() * bpp / 8) + 3) / 4) * 4;
bitsw = ((((sprite->width() + 7) / 8) + 3) / 4) * 4;
size = sprite->height() * (bw + bitsw) + 40;
if (bpp == 8)
size += 256 * 4;
// ICONDIRENTRY
fputc(sprite->width(), f); // width
fputc(sprite->height(), f); // height
fputc(0, f); // color count
fputc(0, f); // reserved
fputw(1, f); // color planes
fputw(bpp, f); // bits per pixel
fputl(size, f); // size in bytes of image data
fputl(offset, f); // file offset to image data
offset += size;
}
base::UniquePtr<Image> image(Image::create(
sprite->pixelFormat(),
sprite->width(),
sprite->height()));
for (n=FrameNumber(0); n<num; ++n) {
clear_image(image, 0);
layer_render(sprite->folder(), image, 0, 0, n);
bpp = (sprite->pixelFormat() == IMAGE_INDEXED) ? 8 : 24;
bw = (((image->width() * bpp / 8) + 3) / 4) * 4;
bitsw = ((((image->width() + 7) / 8) + 3) / 4) * 4;
size = image->height() * (bw + bitsw) + 40;
if (bpp == 8)
size += 256 * 4;
// BITMAPINFOHEADER
fputl(40, f); // size
fputl(image->width(), f); // width
fputl(image->height() * 2, f); // XOR height + AND height
fputw(1, f); // planes
fputw(bpp, f); // bitcount
fputl(0, f); // unused for ico
fputl(size, f); // size
fputl(0, f); // unused for ico
fputl(0, f); // unused for ico
fputl(0, f); // unused for ico
fputl(0, f); // unused for ico
// PALETTE
if (bpp == 8) {
Palette *pal = sprite->getPalette(n);
fputl(0, f); // color 0 is black, so the XOR mask works
for (i=1; i<256; i++) {
fputc(rgba_getb(pal->getEntry(i)), f);
fputc(rgba_getg(pal->getEntry(i)), f);
fputc(rgba_getr(pal->getEntry(i)), f);
fputc(0, f);
}
}
// XOR MASK
for (y=image->height()-1; y>=0; --y) {
for (x=0; x<image->width(); ++x) {
switch (image->pixelFormat()) {
case IMAGE_RGB:
c = get_pixel(image, x, y);
fputc(rgba_getb(c), f);
fputc(rgba_getg(c), f);
fputc(rgba_getr(c), f);
break;
case IMAGE_GRAYSCALE:
c = get_pixel(image, x, y);
fputc(graya_getv(c), f);
fputc(graya_getv(c), f);
fputc(graya_getv(c), f);
break;
case IMAGE_INDEXED:
c = get_pixel(image, x, y);
fputc(c, f);
break;
}
}
// every scanline must be 32-bit aligned
while (x & 3) {
fputc(0, f);
x++;
}
}
// AND MASK
for (y=image->height()-1; y>=0; --y) {
for (x=0; x<(image->width()+7)/8; ++x) {
m = 0;
v = 128;
for (b=0; b<8; b++) {
c = get_pixel(image, x*8+b, y);
switch (image->pixelFormat()) {
case IMAGE_RGB:
if (rgba_geta(c) == 0)
m |= v;
break;
case IMAGE_GRAYSCALE:
if (graya_geta(c) == 0)
m |= v;
break;
case IMAGE_INDEXED:
if (c == 0) // TODO configurable background color (or nothing as background)
m |= v;
break;
}
v >>= 1;
}
fputc(m, f);
}
// every scanline must be 32-bit aligned
while (x & 3) {
fputc(0, f);
x++;
}
}
}
return true;
}
#endif
} // namespace app
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