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117 lines
2.9 KiB
C++
117 lines
2.9 KiB
C++
// This code is in the public domain -- castanyo@yahoo.es
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#pragma once
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#ifndef NV_IMAGE_COLORBLOCK_H
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#define NV_IMAGE_COLORBLOCK_H
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#include "nvmath/Color.h"
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namespace nv
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{
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class Image;
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class FloatImage;
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/// Uncompressed 4x4 color block.
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struct ColorBlock
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{
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ColorBlock();
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ColorBlock(const uint * linearImage);
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ColorBlock(const ColorBlock & block);
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ColorBlock(const Image * img, uint x, uint y);
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void init(const Image * img, uint x, uint y);
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void init(uint w, uint h, const uint * data, uint x, uint y);
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void init(uint w, uint h, const float * data, uint x, uint y);
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void swizzle(uint x, uint y, uint z, uint w); // 0=r, 1=g, 2=b, 3=a, 4=0xFF, 5=0
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bool isSingleColor(Color32 mask = Color32(0xFF, 0xFF, 0xFF, 0x00)) const;
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bool hasAlpha() const;
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// Accessors
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const Color32 * colors() const;
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Color32 color(uint i) const;
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Color32 & color(uint i);
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Color32 color(uint x, uint y) const;
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Color32 & color(uint x, uint y);
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private:
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Color32 m_color[4*4];
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};
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/// Get pointer to block colors.
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inline const Color32 * ColorBlock::colors() const
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{
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return m_color;
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}
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/// Get block color.
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inline Color32 ColorBlock::color(uint i) const
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{
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nvDebugCheck(i < 16);
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return m_color[i];
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}
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/// Get block color.
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inline Color32 & ColorBlock::color(uint i)
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{
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nvDebugCheck(i < 16);
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return m_color[i];
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}
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/// Get block color.
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inline Color32 ColorBlock::color(uint x, uint y) const
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{
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nvDebugCheck(x < 4 && y < 4);
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return m_color[y * 4 + x];
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}
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/// Get block color.
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inline Color32 & ColorBlock::color(uint x, uint y)
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{
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nvDebugCheck(x < 4 && y < 4);
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return m_color[y * 4 + x];
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}
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struct ColorSet
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{
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void setColors(const float * data, uint img_w, uint img_h, uint img_x, uint img_y);
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void setAlphaWeights();
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void setUniformWeights();
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void createMinimalSet(bool ignoreTransparent);
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void wrapIndices();
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void swizzle(uint x, uint y, uint z, uint w); // 0=r, 1=g, 2=b, 3=a, 4=0xFF, 5=0
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bool isSingleColor(bool ignoreAlpha) const;
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bool hasAlpha() const;
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// These methods require indices to be set:
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Vector4 color(uint x, uint y) const { nvDebugCheck(x < w && y < h); return colors[remap[y * 4 + x]]; }
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Vector4 & color(uint x, uint y) { nvDebugCheck(x < w && y < h); return colors[remap[y * 4 + x]]; }
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Vector4 color(uint i) const { nvDebugCheck(i < 16); return colors[remap[i]]; }
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Vector4 & color(uint i) { nvDebugCheck(i < 16); return colors[remap[i]]; }
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uint count;
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uint w, h;
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Vector4 colors[16];
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float weights[16];
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int remap[16];
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};
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} // nv namespace
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#endif // NV_IMAGE_COLORBLOCK_H
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