Initial commit

graphics/tinygl/pixelbuffer.cpp

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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;
+}
+
+}