Initial commit

graphics/scaler/dotmatrix.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/scaler/dotmatrix.h"
+#include "graphics/scaler.h"
+
+DotMatrixScaler::DotMatrixScaler(const Graphics::PixelFormat &format) : Scaler(format) {
+	_factor = 2;
+
+	if (format.bytesPerPixel == 2) {
+		uint16 *lookup16 = (uint16 *)lookup;
+		lookup16[0] = lookup16[10] = format.RGBToColor(0, 63, 0);
+		lookup16[1] = lookup16[11] = format.RGBToColor(0, 0, 63);
+		lookup16[2] = lookup16[8] = format.RGBToColor(63, 0, 0);
+		lookup16[4] = lookup16[6] =
+			lookup16[12] = lookup16[14] = format.RGBToColor(63, 63, 63);
+		lookup16[3] = lookup16[5] = lookup16[7] =
+			lookup16[9] = lookup16[13] =
+			lookup16[15] = lookup16[16] = format.RGBToColor(0, 0, 0);
+	} else {
+		uint32 *lookup32 = (uint32 *)lookup;
+		lookup32[0] = lookup32[10] = format.ARGBToColor(0, 0, 63, 0);
+		lookup32[1] = lookup32[11] = format.ARGBToColor(0, 0, 0, 63);
+		lookup32[2] = lookup32[8] = format.ARGBToColor(0, 63, 0, 0);
+		lookup32[4] = lookup32[6] =
+			lookup32[12] = lookup32[14] = format.ARGBToColor(0, 63, 63, 63);
+		lookup32[3] = lookup32[5] = lookup32[7] =
+			lookup32[9] = lookup32[13] =
+			lookup32[15] = lookup32[16] = format.ARGBToColor(0, 0, 0, 0);
+	}
+}
+
+void DotMatrixScaler::scaleIntern(const uint8 *srcPtr, uint32 srcPitch,
+							uint8 *dstPtr, uint32 dstPitch, int width, int height, int x, int y) {
+	if (_format.bytesPerPixel == 2) {
+		scaleIntern<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height, x, y);
+	} else {
+		scaleIntern<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height, x, y);
+	}
+}
+
+uint DotMatrixScaler::increaseFactor() {
+	return _factor;
+}
+
+uint DotMatrixScaler::decreaseFactor() {
+	return _factor;
+}
+
+template<typename Pixel>
+static inline Pixel DOT(const Pixel *dotmatrix, Pixel c, int j, int i) {
+	return c - ((c >> 2) & dotmatrix[((j & 3) << 2) + (i & 3)]);
+}
+
+template<typename Pixel>
+void DotMatrixScaler::scaleIntern(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
+					int width, int height, int x, int y) {
+
+	const Pixel *dotmatrix = (Pixel *)lookup;
+
+	const uint32 nextlineSrc = srcPitch / sizeof(Pixel);
+	const Pixel *p = (const Pixel *)srcPtr;
+
+	const uint32 nextlineDst = dstPitch / sizeof(Pixel);
+	Pixel *q = (Pixel *)dstPtr;
+
+	int ja = (y * 2) & 3;
+	int ia = (x * 2) & 3;
+
+	for (int j = 0, jj = 0; j < height; ++j, jj += 2) {
+		for (int i = 0, ii = 0; i < width; ++i, ii += 2) {
+			Pixel c = *(p + i);
+			*(q + ii) = DOT<Pixel>(dotmatrix, c, jj + ja, ii + ia);
+			*(q + ii + 1) = DOT<Pixel>(dotmatrix, c, jj + ja, ii + ia + 1);
+			*(q + ii + nextlineDst) = DOT<Pixel>(dotmatrix, c, jj + ja + 1, ii + ia);
+			*(q + ii + nextlineDst + 1) = DOT<Pixel>(dotmatrix, c, jj + ja + 1, ii + ia+ 1);
+		}
+		p += nextlineSrc;
+		q += nextlineDst << 1;
+	}
+}
+
+
+class DotMatrixPlugin final : public ScalerPluginObject {
+public:
+	DotMatrixPlugin();
+
+	Scaler *createInstance(const Graphics::PixelFormat &format) const override;
+
+	bool canDrawCursor() const override { return false; }
+	uint extraPixels() const override { return 0; }
+	const char *getName() const override;
+	const char *getPrettyName() const override;
+};
+
+DotMatrixPlugin::DotMatrixPlugin() {
+	_factors.push_back(2);
+}
+
+Scaler *DotMatrixPlugin::createInstance(const Graphics::PixelFormat &format) const {
+	return new DotMatrixScaler(format);
+}
+
+const char *DotMatrixPlugin::getName() const {
+	return "dotmatrix";
+}
+
+const char *DotMatrixPlugin::getPrettyName() const {
+	return "DotMatrix";
+}
+
+REGISTER_PLUGIN_STATIC(DOTMATRIX, PLUGIN_TYPE_SCALER, DotMatrixPlugin);