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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 "graphics/tinygl/pixelbuffer.h"
namespace Graphics {
PixelBuffer::PixelBuffer()
: _buffer(nullptr),
_dispose(DisposeAfterUse::NO) {
}
PixelBuffer::PixelBuffer(const PixelFormat &format, int buffersize, DisposeAfterUse::Flag dispose)
: _buffer(nullptr),
_dispose(DisposeAfterUse::NO) {
create(format, buffersize, dispose);
}
PixelBuffer::PixelBuffer(const PixelFormat &format, byte *buffer)
: _buffer(buffer),
_format(format),
_dispose(DisposeAfterUse::NO) {
}
PixelBuffer::PixelBuffer(const PixelBuffer &buf) {
*this = buf;
}
PixelBuffer::~PixelBuffer() {
if (_dispose == DisposeAfterUse::YES)
free();
}
void PixelBuffer::create(const Graphics::PixelFormat &format, int buffersize, DisposeAfterUse::Flag dispose) {
if (_dispose == DisposeAfterUse::YES)
free();
_format = format;
_dispose = dispose;
_buffer = new byte[buffersize * format.bytesPerPixel];
}
void PixelBuffer::create(int buffersize, DisposeAfterUse::Flag dispose) {
if (_dispose == DisposeAfterUse::YES)
free();
_dispose = dispose;
_buffer = new byte[buffersize * _format.bytesPerPixel];
}
void PixelBuffer::set(const Graphics::PixelFormat &format, byte *buffer) {
if (_dispose == DisposeAfterUse::YES)
free();
_format = format;
_buffer = buffer;
}
void PixelBuffer::free() {
delete[] _buffer;
_buffer = nullptr;
}
void PixelBuffer::clear(uint length) {
memset(_buffer, 0, length * _format.bytesPerPixel);
}
void PixelBuffer::copyBuffer(int thisFrom, int otherFrom, int length, const PixelBuffer &buf) {
if (buf._format.bytesPerPixel == _format.bytesPerPixel &&
buf._format.rShift == _format.rShift &&
buf._format.gShift == _format.gShift &&
buf._format.bShift == _format.bShift &&
buf._format.rLoss == _format.rLoss &&
buf._format.gLoss == _format.gLoss &&
buf._format.bLoss == _format.bLoss && (
_format.aLoss == 8 ||
buf._format.aLoss == _format.aLoss
)
) {
memcpy(_buffer + thisFrom * _format.bytesPerPixel, buf._buffer + otherFrom * _format.bytesPerPixel, length * _format.bytesPerPixel);
} else {
uint8 r, g, b, a;
for (int i = 0; i < length; ++i) {
buf.getARGBAt(i + otherFrom, a, r, g, b);
setPixelAt(i + thisFrom, a, r, g, b);
}
}
}
PixelBuffer &PixelBuffer::operator=(const PixelBuffer &buf) {
_buffer = buf._buffer;
_format = buf._format;
_dispose = DisposeAfterUse::NO;
return *this;
}
PixelBuffer &PixelBuffer::operator=(byte *buffer) {
_buffer = buffer;
_dispose = DisposeAfterUse::NO;
return *this;
}
}
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