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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup imbdds
*/
/*
* This file is based on a similar file from the NVIDIA texture tools
* (http://nvidia-texture-tools.googlecode.com/)
*
* Original license from NVIDIA follows.
*/
/* This code is in the public domain -- <castanyo@yahoo.es> */
#pragma once
#include <Color.h>
#include <Image.h>
/** Uncompressed 4x4 color block. */
struct ColorBlock {
ColorBlock() = default;
/** Initialize the color block from an array of colors. */
ColorBlock(const uint *linearImage);
/** Initialize the color block with the contents of the given block. */
ColorBlock(const ColorBlock &block);
/** Initialize this color block. */
ColorBlock(const Image *img, uint x, uint y);
void init(const Image *img, uint x, uint y);
void init(uint w, uint h, const uint *data, uint x, uint y);
void init(uint w, uint h, const float *data, uint x, uint y);
void swizzle(uint x, uint y, uint z, uint w); /* 0=r, 1=g, 2=b, 3=a, 4=0xFF, 5=0 */
/** Returns true if the block has a single color. */
bool isSingleColor(Color32 mask = Color32(0xFF, 0xFF, 0xFF, 0x00)) const;
/** Return true if the block is not fully opaque. */
bool hasAlpha() const;
/* Accessors */
const Color32 *colors() const;
Color32 color(uint i) const;
Color32 &color(uint i);
Color32 color(uint x, uint y) const;
Color32 &color(uint x, uint y);
private:
Color32 m_color[4 * 4];
};
/** Get pointer to block colors. */
inline const Color32 *ColorBlock::colors() const
{
return m_color;
}
/** Get block color. */
inline Color32 ColorBlock::color(uint i) const
{
return m_color[i];
}
/** Get block color. */
inline Color32 &ColorBlock::color(uint i)
{
return m_color[i];
}
/** Get block color. */
inline Color32 ColorBlock::color(uint x, uint y) const
{
return m_color[y * 4 + x];
}
/** Get block color. */
inline Color32 &ColorBlock::color(uint x, uint y)
{
return m_color[y * 4 + x];
}
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