mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-13 12:39:56 +00:00
106 lines
2.7 KiB
C++
106 lines
2.7 KiB
C++
/* 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 "common/stream.h"
|
|
#include "common/textconsole.h"
|
|
#include "graphics/pixelformat.h"
|
|
#include "graphics/surface.h"
|
|
|
|
#include "image/scr.h"
|
|
|
|
namespace Image {
|
|
|
|
ScrDecoder::ScrDecoder() {
|
|
_surface = nullptr;
|
|
}
|
|
|
|
ScrDecoder::~ScrDecoder() {
|
|
destroy();
|
|
}
|
|
|
|
void ScrDecoder::destroy() {
|
|
if (_surface) {
|
|
_surface->free();
|
|
delete _surface;
|
|
_surface = nullptr;
|
|
}
|
|
}
|
|
|
|
uint32 ScrDecoder::getPixelAddress(int x, int y) {
|
|
uint32 y76 = y & 0xc0;
|
|
uint32 y53 = y & 0x38;
|
|
uint32 y20 = y & 0x07;
|
|
return (y76 << 5) + (y20 << 8) + (y53 << 2) + (x >> 3);
|
|
}
|
|
|
|
uint32 ScrDecoder::getAttributeAddress(int x, int y) {
|
|
uint32 y73 = y & 0xf8;
|
|
return (y73 << 2) + (x >> 3);
|
|
}
|
|
|
|
bool ScrDecoder::loadStream(Common::SeekableReadStream &stream) {
|
|
destroy();
|
|
|
|
if (stream.size() != 6912)
|
|
warning("Header check failed for reading scr image");
|
|
|
|
byte *data = (byte *)malloc(6144 * sizeof(byte));
|
|
byte *attributes = (byte *)malloc(768 * sizeof(byte));
|
|
|
|
stream.read(data, 6144);
|
|
stream.read(attributes, 768);
|
|
|
|
int width = 256;
|
|
int height = 192;
|
|
Graphics::PixelFormat format(4, 8, 8, 8, 8, 24, 16, 8, 0);
|
|
|
|
_surface = new Graphics::Surface();
|
|
_surface->create(width, height, format);
|
|
|
|
for (int y = 0; y < height; y++) {
|
|
for (int col = 0; col < width >> 3; col++) {
|
|
int x = col << 3;
|
|
byte byt = data[getPixelAddress(x, y)];
|
|
byte attr = attributes[getAttributeAddress(x, y)];
|
|
byte ink = attr & 0x07;
|
|
byte paper = (attr >> 3) & 0x07;
|
|
byte bright = (attr >> 6) & 1;
|
|
byte val = bright ? 0xff : 0xd8;
|
|
for (int bit = 0; bit < 8; bit++) {
|
|
bool set = (byt >> (7 - bit)) & 1;
|
|
int color = set ? ink : paper;
|
|
|
|
byte r = val * (color >> 1 & 1);
|
|
byte g = val * (color >> 2 & 1);
|
|
byte b = val * (color >> 0 & 1);
|
|
|
|
_surface->setPixel(x + bit, y, format.ARGBToColor(0xFF, r, g, b));
|
|
}
|
|
}
|
|
}
|
|
|
|
free(data);
|
|
free(attributes);
|
|
return true;
|
|
}
|
|
|
|
} // End of namespace Image
|