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graphics/tinygl/texelbuffer.h

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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/>.
+ *
+ */
+
+#ifndef GRAPHICS_TEXELBUFFER_H
+#define GRAPHICS_TEXELBUFFER_H
+
+#include "graphics/pixelformat.h"
+
+namespace TinyGL {
+
+class TexelBuffer {
+public:
+	TexelBuffer(uint width, uint height, uint textureSize, int internalformat);
+	virtual ~TexelBuffer() {};
+
+	inline int internalformat() const { return _internalformat; }
+
+	void getARGBAt(
+		uint wrap_s, uint wrap_t,
+		int s, int t,
+		uint8 &a, uint8 &r, uint8 &g, uint8 &b
+	) const;
+
+protected:
+	virtual void getARGBAt(
+		uint pixel,
+		uint ds, uint dt,
+		uint8 &a, uint8 &r, uint8 &g, uint8 &b
+	) const = 0;
+	uint _width, _height, _fracTextureUnit, _fracTextureMask;
+	float _widthRatio, _heightRatio;
+	int _internalformat;
+};
+
+TexelBuffer *createNearestTexelBuffer(const byte *buf, const Graphics::PixelFormat &pf, uint format, uint type, uint width, uint height, uint textureSize, int internalformat);
+TexelBuffer *createBilinearTexelBuffer(byte *buf, const Graphics::PixelFormat &pf, uint format, uint type, uint width, uint height, uint textureSize, int internalformat);
+
+} // end of namespace TinyGL
+
+#endif