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108 lines
3.6 KiB
108 lines
3.6 KiB
/*
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* Copyright (c) 2004 Boudewijn Rempt <boud@valdyas.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef KIS_F16HALF_BASE_COLORSPACE_H_
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#define KIS_F16HALF_BASE_COLORSPACE_H_
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#include <tqcolor.h>
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#include <half.h>
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#include "kis_global.h"
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#include "kis_abstract_colorspace.h"
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#include "kis_integer_maths.h"
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/**
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* This class is the base for all 16-bit float colorspaces using the
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* OpenEXR half format. This format can be used with the OpenGL
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* extensions GL_NV_half_float and GL_ARB_half_float_pixel.
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*/
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inline half UINT8_TO_HALF(uint c)
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{
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return static_cast<half>(c) / UINT8_MAX;
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}
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inline uint HALF_TO_UINT8(half c)
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{
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return static_cast<uint>(CLAMP(static_cast<int>(c * static_cast<int>(UINT8_MAX) + 0.5),
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static_cast<int>(UINT8_MIN), static_cast<int>(UINT8_MAX)));
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}
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inline uint HALF_TO_UINT16(half c)
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{
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return static_cast<uint>(CLAMP(static_cast<int>(c * static_cast<int>(UINT16_MAX) + 0.5),
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static_cast<int>(UINT16_MIN), static_cast<int>(UINT16_MAX)));
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}
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inline half HALF_BLEND(half a, half b, half alpha)
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{
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return (a - b) * alpha + b;
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}
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#define F16HALF_OPACITY_OPAQUE ((half)1.0f)
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#define F16HALF_OPACITY_TRANSPARENT ((half)0.0f)
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class KisF16HalfBaseColorSpace : public KisAbstractColorSpace {
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public:
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KisF16HalfBaseColorSpace(const KisID & id, DWORD cmType, icColorSpaceSignature colorSpaceSignature,
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KisColorSpaceFactoryRegistry * parent,
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KisProfile *p)
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: KisAbstractColorSpace(id, cmType, colorSpaceSignature, parent, p)
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{
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m_alphaSize = sizeof(half);
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};
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virtual TQ_UINT8 getAlpha(const TQ_UINT8 * pixel) const;
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virtual void setAlpha(TQ_UINT8 * pixels, TQ_UINT8 alpha, TQ_INT32 nPixels) const;
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virtual void multiplyAlpha(TQ_UINT8 * pixels, TQ_UINT8 alpha, TQ_INT32 nPixels);
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virtual void applyAlphaU8Mask(TQ_UINT8 * pixels, TQ_UINT8 * alpha, TQ_INT32 nPixels);
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virtual void applyInverseAlphaU8Mask(TQ_UINT8 * pixels, TQ_UINT8 * alpha, TQ_INT32 nPixels);
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virtual TQString channelValueText(const TQ_UINT8 *pixel, TQ_UINT32 channelIndex) const;
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virtual TQString normalisedChannelValueText(const TQ_UINT8 *pixel, TQ_UINT32 channelIndex) const;
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virtual TQ_UINT8 scaleToU8(const TQ_UINT8 * srcPixel, TQ_INT32 channelPos);
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virtual TQ_UINT16 scaleToU16(const TQ_UINT8 * srcPixel, TQ_INT32 channelPos);
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virtual bool hasHighDynamicRange() const { return true; }
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protected:
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// For Alpha Composite
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struct F16HalfMult {
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inline half operator()(const half& a, const half& b) const {
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return a * b;
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}
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};
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struct Uint8ToF16Half {
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inline half operator()(const TQ_UINT8 src) const {
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return UINT8_TO_HALF(src);
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}
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};
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struct F16HalfOpacityTest {
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inline bool operator()(const half& opacity) const {
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return opacity > F16HALF_OPACITY_TRANSPARENT + HALF_EPSILON;
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}
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};
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};
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#endif // KIS_F16HALF_BASE_COLORSPACE_H_
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