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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "ags/shared/gfx/image.h"
#include "ags/shared/util/file.h"
#include "ags/shared/util/stream.h"
#include "ags/lib/allegro.h"
#include "common/file.h"
#include "common/str.h"
#include "common/stream.h"
#include "common/textconsole.h"
#include "image/bmp.h"
#include "image/iff.h"
#include "image/pcx.h"
#include "image/tga.h"
#define VGA_COLOR_TRANS(x) ((x) * 255 / 63)
namespace AGS3 {
template<class DECODER>
BITMAP *decodeImageStream(Common::SeekableReadStream &stream, color *pal) {
DECODER decoder;
if (decoder.loadStream(stream)) {
// Create the output surface
const Graphics::Surface *src = decoder.getSurface();
// Copy the decoded surface
int bpp = 8 * src->format.bytesPerPixel;
if (bpp == 24)
bpp = 32;
Surface *dest = (Surface *)create_bitmap_ex(bpp, src->w, src->h);
dest->blitFrom(*src);
// Copy the palette
const byte *palP = decoder.getPalette();
if (palP && pal) {
for (int idx = 0; idx < 256; ++idx, palP += 3) {
pal[idx].r = palP[0];
pal[idx].g = palP[1];
pal[idx].b = palP[2];
pal[idx].filler = 0xff;
}
}
return dest;
} else {
return nullptr;
}
}
template<class DECODER>
BITMAP *decodeImage(const char *filename, color *pal) {
AGS::Shared::Stream *file = AGS3::AGS::Shared::File::OpenFileRead(filename);
if (!file)
return nullptr;
AGS::Shared::ScummVMReadStream f(file);
return decodeImageStream<DECODER>(f, pal);
}
template<class DECODER>
BITMAP *decodeImage(PACKFILE *pf, color *pal) {
if (!pf)
return nullptr;
AGS::Shared::ScummVMPackReadStream f(pf);
f.seek(0);
return decodeImageStream<DECODER>(f, pal);
}
BITMAP *load_bmp(const char *filename, color *pal) {
return decodeImage<Image::BitmapDecoder>(filename, pal);
}
BITMAP *load_lbm(const char *filename, color *pal) {
return decodeImage<Image::IFFDecoder>(filename, pal);
}
BITMAP *load_pcx(const char *filename, color *pal) {
return decodeImage<Image::PCXDecoder>(filename, pal);
}
BITMAP *load_tga(const char *filename, color *pal) {
return decodeImage<Image::TGADecoder>(filename, pal);
}
BITMAP *load_bitmap(const char *filename, color *pal) {
Common::String fname(filename);
if (fname.hasSuffixIgnoreCase(".bmp"))
return load_bmp(filename, pal);
else if (fname.hasSuffixIgnoreCase(".lbm"))
return load_lbm(filename, pal);
else if (fname.hasSuffixIgnoreCase(".pcx"))
return load_pcx(filename, pal);
else if (fname.hasSuffixIgnoreCase(".tga"))
return load_tga(filename, pal);
else
error("Unknown image file - %s", filename);
}
BITMAP *load_bitmap(PACKFILE *pf, color *pal) {
BITMAP *result;
if ((result = decodeImage<Image::BitmapDecoder>(pf, pal)) != nullptr)
return result;
if ((result = decodeImage<Image::IFFDecoder>(pf, pal)) != nullptr)
return result;
if ((result = decodeImage<Image::PCXDecoder>(pf, pal)) != nullptr)
return result;
if ((result = decodeImage<Image::TGADecoder>(pf, pal)) != nullptr)
return result;
error("Unknown image file");
}
int save_bitmap(Common::WriteStream &out, BITMAP *bmp, const RGB *pal) {
#ifdef SCUMM_LITTLE_ENDIAN
const Graphics::PixelFormat requiredFormat_3byte(3, 8, 8, 8, 0, 16, 8, 0, 0);
#else
const Graphics::PixelFormat requiredFormat_3byte(3, 8, 8, 8, 0, 0, 8, 16, 0);
#endif
Graphics::ManagedSurface surface(bmp->w, bmp->h, requiredFormat_3byte);
Graphics::ManagedSurface &src = bmp->getSurface();
if (bmp->format.bytesPerPixel == 1) {
Graphics::ManagedSurface temp;
temp.copyFrom(src);
if (pal) {
byte palette[256 * 3];
for (int c = 0, i = 0; c < 256; ++c, i += 3) {
palette[i] = VGA_COLOR_TRANS(pal[c].r);
palette[i + 1] = VGA_COLOR_TRANS(pal[c].g);
palette[i + 2] = VGA_COLOR_TRANS(pal[c].b);
}
temp.setPalette(palette, 0, 256);
}
surface.rawBlitFrom(temp, Common::Rect(0, 0, src.w, src.h),
Common::Point(0, 0));
} else {
// Copy from the source surface without alpha transparency
Graphics::ManagedSurface temp;
temp.copyFrom(src);
temp.format.aLoss = 8;
surface.rawBlitFrom(temp, Common::Rect(0, 0, src.w, src.h),
Common::Point(0, 0));
}
// Write out the bitmap
int dstPitch = surface.w * 3;
int extraDataLength = (dstPitch % 4) ? 4 - (dstPitch % 4) : 0;
int padding = 0;
out.writeByte('B');
out.writeByte('M');
out.writeUint32LE(surface.h * dstPitch + 54);
out.writeUint32LE(0);
out.writeUint32LE(54);
out.writeUint32LE(40);
out.writeUint32LE(surface.w);
out.writeUint32LE(surface.h);
out.writeUint16LE(1);
out.writeUint16LE(24);
out.writeUint32LE(0);
out.writeUint32LE(0);
out.writeUint32LE(0);
out.writeUint32LE(0);
out.writeUint32LE(0);
out.writeUint32LE(0);
for (uint y = surface.h; y-- > 0;) {
out.write((const void *)surface.getBasePtr(0, y), dstPitch);
out.write(&padding, extraDataLength);
}
return true;
}
} // namespace AGS
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