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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/tinygl/pixelbuffer.h"
namespace TinyGL {
class TexelBuffer {
public:
TexelBuffer(uint width, uint height, uint textureSize);
virtual ~TexelBuffer() {};
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;
};
class NearestTexelBuffer : public TexelBuffer {
public:
NearestTexelBuffer(const Graphics::PixelBuffer &buf, uint width, uint height, uint textureSize);
~NearestTexelBuffer();
protected:
void getARGBAt(
uint pixel,
uint, uint,
uint8 &a, uint8 &r, uint8 &g, uint8 &b
) const override;
private:
Graphics::PixelBuffer _buf;
};
class BilinearTexelBuffer : public TexelBuffer {
public:
BilinearTexelBuffer(const Graphics::PixelBuffer &buf, uint width, uint height, uint textureSize);
~BilinearTexelBuffer();
protected:
void getARGBAt(
uint pixel,
uint ds, uint dt,
uint8 &a, uint8 &r, uint8 &g, uint8 &b
) const override;
private:
uint32 *_texels;
};
} // end of namespace TinyGL
#endif
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