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2093 lines
54 KiB
C++
2093 lines
54 KiB
C++
// Copyright (c) 2009-2011 Ignacio Castano <castano@gmail.com>
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// Copyright (c) 2007-2009 NVIDIA Corporation -- Ignacio Castano <icastano@nvidia.com>
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#include "TexImage.h"
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#include "nvmath/Vector.h"
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#include "nvmath/Matrix.h"
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#include "nvmath/Color.h"
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#include "nvmath/Half.h"
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#include "nvimage/Filter.h"
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#include "nvimage/ImageIO.h"
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#include "nvimage/NormalMap.h"
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#include "nvimage/BlockDXT.h"
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#include "nvimage/ColorBlock.h"
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#include "nvimage/PixelFormat.h"
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#include "nvimage/ErrorMetric.h"
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#include <float.h>
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using namespace nv;
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using namespace nvtt;
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namespace
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{
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// 1 -> 1, 2 -> 2, 3 -> 2, 4 -> 4, 5 -> 4, ...
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static uint previousPowerOfTwo(const uint v)
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{
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return nextPowerOfTwo(v + 1) / 2;
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}
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static uint nearestPowerOfTwo(const uint v)
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{
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const uint np2 = nextPowerOfTwo(v);
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const uint pp2 = previousPowerOfTwo(v);
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if (np2 - v <= v - pp2)
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{
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return np2;
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}
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else
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{
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return pp2;
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}
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}
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static int blockSize(Format format)
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{
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if (format == Format_DXT1 || format == Format_DXT1a || format == Format_DXT1n) {
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return 8;
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}
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else if (format == Format_DXT3) {
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return 16;
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}
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else if (format == Format_DXT5 || format == Format_DXT5n) {
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return 16;
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}
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else if (format == Format_BC4) {
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return 8;
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}
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else if (format == Format_BC5) {
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return 16;
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}
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else if (format == Format_CTX1) {
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return 8;
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}
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else if (format == Format_BC6) {
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return 16;
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}
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else if (format == Format_BC7) {
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return 16;
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}
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return 0;
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}
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}
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uint nv::countMipmaps(uint w)
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{
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uint mipmap = 0;
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while (w != 1) {
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w = max(1U, w / 2);
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mipmap++;
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}
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return mipmap + 1;
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}
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uint nv::countMipmaps(uint w, uint h, uint d)
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{
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uint mipmap = 0;
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while (w != 1 || h != 1 || d != 1) {
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w = max(1U, w / 2);
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h = max(1U, h / 2);
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d = max(1U, d / 2);
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mipmap++;
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}
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return mipmap + 1;
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}
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uint nv::computeImageSize(uint w, uint h, uint d, uint bitCount, uint pitchAlignmentInBytes, Format format)
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{
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if (format == Format_RGBA) {
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return d * h * computeBytePitch(w, bitCount, pitchAlignmentInBytes);
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}
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else {
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return ((w + 3) / 4) * ((h + 3) / 4) * blockSize(format) * d;
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}
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}
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void nv::getTargetExtent(int & w, int & h, int & d, int maxExtent, RoundMode roundMode, TextureType textureType) {
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nvDebugCheck(w > 0);
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nvDebugCheck(h > 0);
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nvDebugCheck(d > 0);
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if (roundMode != RoundMode_None && maxExtent > 0)
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{
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// rounded max extent should never be higher than original max extent.
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maxExtent = previousPowerOfTwo(maxExtent);
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}
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// Scale extents without changing aspect ratio.
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int m = max(max(w, h), d);
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if (maxExtent > 0 && m > maxExtent)
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{
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w = max((w * maxExtent) / m, 1);
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h = max((h * maxExtent) / m, 1);
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d = max((d * maxExtent) / m, 1);
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}
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if (textureType == TextureType_2D)
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{
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d = 1;
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}
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else if (textureType == TextureType_Cube)
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{
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w = h = (w + h) / 2;
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d = 1;
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}
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// Round to power of two.
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if (roundMode == RoundMode_ToNextPowerOfTwo)
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{
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w = nextPowerOfTwo(w);
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h = nextPowerOfTwo(h);
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d = nextPowerOfTwo(d);
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}
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else if (roundMode == RoundMode_ToNearestPowerOfTwo)
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{
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w = nearestPowerOfTwo(w);
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h = nearestPowerOfTwo(h);
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d = nearestPowerOfTwo(d);
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}
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else if (roundMode == RoundMode_ToPreviousPowerOfTwo)
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{
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w = previousPowerOfTwo(w);
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h = previousPowerOfTwo(h);
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d = previousPowerOfTwo(d);
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}
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}
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TexImage::TexImage() : m(new TexImage::Private())
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{
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m->addRef();
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}
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TexImage::TexImage(const TexImage & tex) : m(tex.m)
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{
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if (m != NULL) m->addRef();
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}
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TexImage::~TexImage()
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{
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if (m != NULL) m->release();
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m = NULL;
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}
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void TexImage::operator=(const TexImage & tex)
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{
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if (tex.m != NULL) tex.m->addRef();
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if (m != NULL) m->release();
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m = tex.m;
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}
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void TexImage::detach()
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{
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if (m->refCount() > 1)
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{
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m->release();
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m = new TexImage::Private(*m);
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m->addRef();
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nvDebugCheck(m->refCount() == 1);
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}
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}
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void TexImage::setWrapMode(WrapMode wrapMode)
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{
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if (m->wrapMode != wrapMode)
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{
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detach();
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m->wrapMode = wrapMode;
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}
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}
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void TexImage::setAlphaMode(AlphaMode alphaMode)
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{
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if (m->alphaMode != alphaMode)
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{
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detach();
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m->alphaMode = alphaMode;
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}
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}
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void TexImage::setNormalMap(bool isNormalMap)
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{
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if (m->isNormalMap != isNormalMap)
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{
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detach();
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m->isNormalMap = isNormalMap;
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}
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}
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bool TexImage::isNull() const
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{
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return m->image == NULL;
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}
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int TexImage::width() const
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{
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if (m->image != NULL) return m->image->width();
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return 0;
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}
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int TexImage::height() const
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{
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if (m->image != NULL) return m->image->height();
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return 0;
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}
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int TexImage::depth() const
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{
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if (m->image != NULL) return m->image->depth();
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return 0;
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}
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WrapMode TexImage::wrapMode() const
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{
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return m->wrapMode;
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}
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AlphaMode TexImage::alphaMode() const
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{
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return m->alphaMode;
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}
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bool TexImage::isNormalMap() const
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{
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return m->isNormalMap;
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}
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TextureType TexImage::type() const
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{
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return m->type;
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}
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int TexImage::countMipmaps() const
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{
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if (m->image == NULL) return 0;
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return ::countMipmaps(m->image->width(), m->image->height(), 1);
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}
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float TexImage::alphaTestCoverage(float alphaRef/*= 0.5*/) const
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{
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if (m->image == NULL) return 0.0f;
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return m->image->alphaTestCoverage(alphaRef, 3);
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}
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float TexImage::average(int channel, int alpha_channel/*= -1*/, float gamma /*= 2.2f*/) const
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{
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if (m->image == NULL) return 0.0f;
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const uint count = m->image->width() * m->image->height();
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float sum = 0.0f;
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const float * c = m->image->channel(channel);
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float denom;
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if (alpha_channel == -1) {
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for (uint i = 0; i < count; i++) {
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sum += powf(c[i], gamma);
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}
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denom = float(count);
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}
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else {
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float alpha_sum = 0.0f;
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const float * a = m->image->channel(alpha_channel);
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for (uint i = 0; i < count; i++) {
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sum += powf(c[i], gamma) * a[i];
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alpha_sum += a[i];
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}
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denom = alpha_sum;
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}
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// Avoid division by zero.
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if (denom == 0.0f) return 0.0f;
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return sum / denom;
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}
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const float * TexImage::data() const
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{
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return m->image->channel(0);
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}
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void TexImage::histogram(int channel, float rangeMin, float rangeMax, int binCount, int * binPtr) const
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{
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// We assume it's clear in case we want to accumulate multiple histograms.
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//memset(bins, 0, sizeof(int)*count);
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if (m->image == NULL) return;
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const float * c = m->image->channel(channel);
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float scale = float(binCount) / rangeMax;
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float bias = - scale * rangeMin;
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const uint count = m->image->pixelCount();
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for (uint i = 0; i < count; i++) {
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float f = c[i] * scale + bias;
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int idx = ifloor(f);
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if (idx < 0) idx = 0;
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if (idx > binCount-1) idx = binCount-1;
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binPtr[idx]++;
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}
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}
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void TexImage::range(int channel, float * rangeMin, float * rangeMax)
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{
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Vector2 range(FLT_MAX, -FLT_MAX);
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FloatImage * img = m->image;
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float * c = img->channel(channel);
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const uint count = img->pixelCount();
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for (uint p = 0; p < count; p++) {
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float f = c[p];
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if (f < range.x) range.x = f;
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if (f > range.y)
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range.y = f;
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}
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*rangeMin = range.x;
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*rangeMax = range.y;
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}
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bool TexImage::load(const char * fileName, bool * hasAlpha/*= NULL*/)
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{
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AutoPtr<FloatImage> img(ImageIO::loadFloat(fileName));
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if (img == NULL) {
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return false;
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}
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detach();
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if (hasAlpha != NULL) {
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*hasAlpha = (img->componentCount() == 4);
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}
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// @@ Have loadFloat allocate the image with the desired number of channels.
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img->resizeChannelCount(4);
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delete m->image;
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m->image = img.release();
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return true;
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}
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bool TexImage::save(const char * fileName) const
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{
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if (m->image != NULL)
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{
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return ImageIO::saveFloat(fileName, m->image, 0, 4);
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}
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return false;
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}
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bool TexImage::setImage(nvtt::InputFormat format, int w, int h, int d, const void * data)
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{
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detach();
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if (m->image == NULL) {
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m->image = new FloatImage();
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}
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m->image->allocate(4, w, h, d);
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m->type = (d == 1) ? TextureType_2D : TextureType_3D;
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const int count = m->image->pixelCount();
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float * rdst = m->image->channel(0);
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float * gdst = m->image->channel(1);
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float * bdst = m->image->channel(2);
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float * adst = m->image->channel(3);
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if (format == InputFormat_BGRA_8UB)
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{
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const Color32 * src = (const Color32 *)data;
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try {
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for (int i = 0; i < count; i++)
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{
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rdst[i] = float(src[i].r) / 255.0f;
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gdst[i] = float(src[i].g) / 255.0f;
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bdst[i] = float(src[i].b) / 255.0f;
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adst[i] = float(src[i].a) / 255.0f;
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}
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}
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catch(...) {
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return false;
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}
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}
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else if (format == InputFormat_RGBA_16F)
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{
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const uint16 * src = (const uint16 *)data;
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try {
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for (int i = 0; i < count; i++)
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{
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((uint32 *)rdst)[i] = half_to_float(src[4*i+0]);
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((uint32 *)gdst)[i] = half_to_float(src[4*i+1]);
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((uint32 *)bdst)[i] = half_to_float(src[4*i+2]);
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((uint32 *)adst)[i] = half_to_float(src[4*i+3]);
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}
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}
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catch(...) {
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return false;
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}
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}
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else if (format == InputFormat_RGBA_32F)
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{
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const float * src = (const float *)data;
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try {
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for (int i = 0; i < count; i++)
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{
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rdst[i] = src[4 * i + 0];
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gdst[i] = src[4 * i + 1];
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bdst[i] = src[4 * i + 2];
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adst[i] = src[4 * i + 3];
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}
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}
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catch(...) {
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return false;
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}
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}
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return true;
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}
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bool TexImage::setImage(InputFormat format, int w, int h, int d, const void * r, const void * g, const void * b, const void * a)
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{
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detach();
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if (m->image == NULL) {
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m->image = new FloatImage();
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}
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m->image->allocate(4, w, h, d);
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m->type = (d == 1) ? TextureType_2D : TextureType_3D;
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const int count = m->image->pixelCount();
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float * rdst = m->image->channel(0);
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float * gdst = m->image->channel(1);
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float * bdst = m->image->channel(2);
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float * adst = m->image->channel(3);
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if (format == InputFormat_BGRA_8UB)
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{
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const uint8 * rsrc = (const uint8 *)r;
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const uint8 * gsrc = (const uint8 *)g;
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const uint8 * bsrc = (const uint8 *)b;
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const uint8 * asrc = (const uint8 *)a;
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try {
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for (int i = 0; i < count; i++) rdst[i] = float(rsrc[i]) / 255.0f;
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for (int i = 0; i < count; i++) gdst[i] = float(gsrc[i]) / 255.0f;
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for (int i = 0; i < count; i++) bdst[i] = float(bsrc[i]) / 255.0f;
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for (int i = 0; i < count; i++) adst[i] = float(asrc[i]) / 255.0f;
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}
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catch(...) {
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return false;
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}
|
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}
|
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else if (format == InputFormat_RGBA_16F)
|
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{
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const uint16 * rsrc = (const uint16 *)r;
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const uint16 * gsrc = (const uint16 *)g;
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const uint16 * bsrc = (const uint16 *)b;
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const uint16 * asrc = (const uint16 *)a;
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try {
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for (int i = 0; i < count; i++) ((uint32 *)rdst)[i] = half_to_float(rsrc[i]);
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for (int i = 0; i < count; i++) ((uint32 *)gdst)[i] = half_to_float(gsrc[i]);
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for (int i = 0; i < count; i++) ((uint32 *)bdst)[i] = half_to_float(bsrc[i]);
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for (int i = 0; i < count; i++) ((uint32 *)adst)[i] = half_to_float(asrc[i]);
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}
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catch(...) {
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return false;
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}
|
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}
|
|
else if (format == InputFormat_RGBA_32F)
|
|
{
|
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const float * rsrc = (const float *)r;
|
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const float * gsrc = (const float *)g;
|
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const float * bsrc = (const float *)b;
|
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const float * asrc = (const float *)a;
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|
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try {
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memcpy(rdst, rsrc, count * sizeof(float));
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memcpy(gdst, gsrc, count * sizeof(float));
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memcpy(bdst, bsrc, count * sizeof(float));
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memcpy(adst, asrc, count * sizeof(float));
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}
|
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catch(...) {
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return false;
|
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}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// @@ Add support for compressed 3D textures.
|
|
bool TexImage::setImage2D(Format format, Decoder decoder, int w, int h, const void * data)
|
|
{
|
|
if (format != nvtt::Format_BC1 && format != nvtt::Format_BC2 && format != nvtt::Format_BC3 && format != nvtt::Format_BC4 && format != nvtt::Format_BC5)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
detach();
|
|
|
|
if (m->image == NULL) {
|
|
m->image = new FloatImage();
|
|
}
|
|
m->image->allocate(4, w, h, 1);
|
|
m->type = TextureType_2D;
|
|
|
|
const int bw = (w + 3) / 4;
|
|
const int bh = (h + 3) / 4;
|
|
|
|
const uint bs = blockSize(format);
|
|
|
|
const uint8 * ptr = (const uint8 *)data;
|
|
|
|
try {
|
|
for (int y = 0; y < bh; y++)
|
|
{
|
|
for (int x = 0; x < bw; x++)
|
|
{
|
|
ColorBlock colors;
|
|
|
|
if (format == nvtt::Format_BC1)
|
|
{
|
|
const BlockDXT1 * block = (const BlockDXT1 *)ptr;
|
|
|
|
if (decoder == Decoder_D3D10) {
|
|
block->decodeBlock(&colors, false);
|
|
}
|
|
else if (decoder == Decoder_D3D9) {
|
|
block->decodeBlock(&colors, false);
|
|
}
|
|
else if (decoder == Decoder_NV5x) {
|
|
block->decodeBlockNV5x(&colors);
|
|
}
|
|
}
|
|
else if (format == nvtt::Format_BC2)
|
|
{
|
|
const BlockDXT3 * block = (const BlockDXT3 *)ptr;
|
|
|
|
if (decoder == Decoder_D3D10) {
|
|
block->decodeBlock(&colors, false);
|
|
}
|
|
else if (decoder == Decoder_D3D9) {
|
|
block->decodeBlock(&colors, false);
|
|
}
|
|
else if (decoder == Decoder_NV5x) {
|
|
block->decodeBlockNV5x(&colors);
|
|
}
|
|
}
|
|
else if (format == nvtt::Format_BC3)
|
|
{
|
|
const BlockDXT5 * block = (const BlockDXT5 *)ptr;
|
|
|
|
if (decoder == Decoder_D3D10) {
|
|
block->decodeBlock(&colors, false);
|
|
}
|
|
else if (decoder == Decoder_D3D9) {
|
|
block->decodeBlock(&colors, false);
|
|
}
|
|
else if (decoder == Decoder_NV5x) {
|
|
block->decodeBlockNV5x(&colors);
|
|
}
|
|
}
|
|
else if (format == nvtt::Format_BC4)
|
|
{
|
|
const BlockATI1 * block = (const BlockATI1 *)ptr;
|
|
block->decodeBlock(&colors, decoder == Decoder_D3D9);
|
|
}
|
|
else if (format == nvtt::Format_BC5)
|
|
{
|
|
const BlockATI2 * block = (const BlockATI2 *)ptr;
|
|
block->decodeBlock(&colors, decoder == Decoder_D3D9);
|
|
}
|
|
|
|
for (int yy = 0; yy < 4; yy++)
|
|
{
|
|
for (int xx = 0; xx < 4; xx++)
|
|
{
|
|
Color32 c = colors.color(xx, yy);
|
|
|
|
if (x * 4 + xx < w && y * 4 + yy < h)
|
|
{
|
|
m->image->pixel(0, x*4 + xx, y*4 + yy, 0) = float(c.r) * 1.0f/255.0f;
|
|
m->image->pixel(1, x*4 + xx, y*4 + yy, 0) = float(c.g) * 1.0f/255.0f;
|
|
m->image->pixel(2, x*4 + xx, y*4 + yy, 0) = float(c.b) * 1.0f/255.0f;
|
|
m->image->pixel(3, x*4 + xx, y*4 + yy, 0) = float(c.a) * 1.0f/255.0f;
|
|
}
|
|
}
|
|
}
|
|
|
|
ptr += bs;
|
|
}
|
|
}
|
|
}
|
|
catch(...) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
static void getDefaultFilterWidthAndParams(int filter, float * filterWidth, float params[2])
|
|
{
|
|
if (filter == ResizeFilter_Box) {
|
|
*filterWidth = 0.5f;
|
|
}
|
|
else if (filter == ResizeFilter_Triangle) {
|
|
*filterWidth = 1.0f;
|
|
}
|
|
else if (filter == ResizeFilter_Kaiser)
|
|
{
|
|
*filterWidth = 3.0f;
|
|
params[0] = 4.0f;
|
|
params[1] = 1.0f;
|
|
}
|
|
else //if (filter == ResizeFilter_Mitchell)
|
|
{
|
|
*filterWidth = 2.0f;
|
|
params[0] = 1.0f / 3.0f;
|
|
params[1] = 1.0f / 3.0f;
|
|
}
|
|
}
|
|
|
|
void TexImage::resize(int w, int h, int d, ResizeFilter filter)
|
|
{
|
|
float filterWidth;
|
|
float params[2];
|
|
getDefaultFilterWidthAndParams(filter, &filterWidth, params);
|
|
|
|
resize(w, h, d, filter, filterWidth, params);
|
|
}
|
|
|
|
void TexImage::resize(int w, int h, int d, ResizeFilter filter, float filterWidth, const float * params)
|
|
{
|
|
FloatImage * img = m->image;
|
|
if (img == NULL || (w == img->width() && h == img->height() && d == img->depth())) {
|
|
return;
|
|
}
|
|
|
|
detach();
|
|
|
|
FloatImage::WrapMode wrapMode = (FloatImage::WrapMode)m->wrapMode;
|
|
|
|
if (m->alphaMode == AlphaMode_Transparency)
|
|
{
|
|
if (filter == ResizeFilter_Box)
|
|
{
|
|
BoxFilter filter(filterWidth);
|
|
img = img->resize(filter, w, h, d, wrapMode, 3);
|
|
}
|
|
else if (filter == ResizeFilter_Triangle)
|
|
{
|
|
TriangleFilter filter(filterWidth);
|
|
img = img->resize(filter, w, h, d, wrapMode, 3);
|
|
}
|
|
else if (filter == ResizeFilter_Kaiser)
|
|
{
|
|
KaiserFilter filter(filterWidth);
|
|
if (params != NULL) filter.setParameters(params[0], params[1]);
|
|
img = img->resize(filter, w, h, d, wrapMode, 3);
|
|
}
|
|
else //if (filter == ResizeFilter_Mitchell)
|
|
{
|
|
nvDebugCheck(filter == ResizeFilter_Mitchell);
|
|
MitchellFilter filter;
|
|
if (params != NULL) filter.setParameters(params[0], params[1]);
|
|
img = img->resize(filter, w, h, d, wrapMode, 3);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (filter == ResizeFilter_Box)
|
|
{
|
|
BoxFilter filter(filterWidth);
|
|
img = img->resize(filter, w, h, d, wrapMode);
|
|
}
|
|
else if (filter == ResizeFilter_Triangle)
|
|
{
|
|
TriangleFilter filter(filterWidth);
|
|
img = img->resize(filter, w, h, d, wrapMode);
|
|
}
|
|
else if (filter == ResizeFilter_Kaiser)
|
|
{
|
|
KaiserFilter filter(filterWidth);
|
|
if (params != NULL) filter.setParameters(params[0], params[1]);
|
|
img = img->resize(filter, w, h, d, wrapMode);
|
|
}
|
|
else //if (filter == ResizeFilter_Mitchell)
|
|
{
|
|
nvDebugCheck(filter == ResizeFilter_Mitchell);
|
|
MitchellFilter filter;
|
|
if (params != NULL) filter.setParameters(params[0], params[1]);
|
|
img = img->resize(filter, w, h, d, wrapMode);
|
|
}
|
|
}
|
|
|
|
delete m->image;
|
|
m->image = img;
|
|
}
|
|
|
|
void TexImage::resize(int maxExtent, RoundMode roundMode, ResizeFilter filter)
|
|
{
|
|
float filterWidth;
|
|
float params[2];
|
|
getDefaultFilterWidthAndParams(filter, &filterWidth, params);
|
|
|
|
resize(maxExtent, roundMode, filter, filterWidth, params);
|
|
}
|
|
|
|
void TexImage::resize(int maxExtent, RoundMode roundMode, ResizeFilter filter, float filterWidth, const float * params)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
int w = m->image->width();
|
|
int h = m->image->height();
|
|
int d = m->image->depth();
|
|
|
|
getTargetExtent(w, h, d, maxExtent, roundMode, m->type);
|
|
|
|
resize(w, h, d, filter, filterWidth, params);
|
|
}
|
|
|
|
bool TexImage::buildNextMipmap(MipmapFilter filter)
|
|
{
|
|
float filterWidth;
|
|
float params[2];
|
|
getDefaultFilterWidthAndParams(filter, &filterWidth, params);
|
|
|
|
return buildNextMipmap(filter, filterWidth, params);
|
|
}
|
|
|
|
bool TexImage::buildNextMipmap(MipmapFilter filter, float filterWidth, const float * params)
|
|
{
|
|
FloatImage * img = m->image;
|
|
if (img == NULL || (img->width() == 1 && img->height() == 1 && img->depth() == 1)) {
|
|
return false;
|
|
}
|
|
|
|
detach();
|
|
|
|
FloatImage::WrapMode wrapMode = (FloatImage::WrapMode)m->wrapMode;
|
|
|
|
if (m->alphaMode == AlphaMode_Transparency)
|
|
{
|
|
if (filter == MipmapFilter_Box)
|
|
{
|
|
BoxFilter filter(filterWidth);
|
|
img = img->downSample(filter, wrapMode, 3);
|
|
}
|
|
else if (filter == MipmapFilter_Triangle)
|
|
{
|
|
TriangleFilter filter(filterWidth);
|
|
img = img->downSample(filter, wrapMode, 3);
|
|
}
|
|
else if (filter == MipmapFilter_Kaiser)
|
|
{
|
|
nvDebugCheck(filter == MipmapFilter_Kaiser);
|
|
KaiserFilter filter(filterWidth);
|
|
if (params != NULL) filter.setParameters(params[0], params[1]);
|
|
img = img->downSample(filter, wrapMode, 3);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (filter == MipmapFilter_Box)
|
|
{
|
|
if (filterWidth == 0.5f && img->depth() == 1) {
|
|
img = img->fastDownSample();
|
|
}
|
|
else {
|
|
BoxFilter filter(filterWidth);
|
|
img = img->downSample(filter, wrapMode);
|
|
}
|
|
}
|
|
else if (filter == MipmapFilter_Triangle)
|
|
{
|
|
TriangleFilter filter(filterWidth);
|
|
img = img->downSample(filter, wrapMode);
|
|
}
|
|
else //if (filter == MipmapFilter_Kaiser)
|
|
{
|
|
nvDebugCheck(filter == MipmapFilter_Kaiser);
|
|
KaiserFilter filter(filterWidth);
|
|
if (params != NULL) filter.setParameters(params[0], params[1]);
|
|
img = img->downSample(filter, wrapMode);
|
|
}
|
|
}
|
|
|
|
delete m->image;
|
|
m->image = img;
|
|
|
|
return true;
|
|
}
|
|
|
|
void TexImage::canvasSize(int w, int h, int d)
|
|
{
|
|
nvDebugCheck(w > 0 && h > 0 && d > 0);
|
|
|
|
FloatImage * img = m->image;
|
|
if (img == NULL || (w == img->width() && h == img->height() && d == img->depth())) {
|
|
return;
|
|
}
|
|
|
|
detach();
|
|
|
|
FloatImage * new_img = new FloatImage;
|
|
new_img->allocate(4, w, h, d);
|
|
new_img->clear();
|
|
|
|
w = min(uint(w), img->width());
|
|
h = min(uint(h), img->height());
|
|
d = min(uint(d), img->depth());
|
|
|
|
for (int z = 0; z < d; z++) {
|
|
for (int y = 0; y < h; y++) {
|
|
for (int x = 0; x < w; x++) {
|
|
new_img->pixel(0, x, y, z) = img->pixel(0, x, y, z);
|
|
new_img->pixel(1, x, y, z) = img->pixel(1, x, y, z);
|
|
new_img->pixel(2, x, y, z) = img->pixel(2, x, y, z);
|
|
new_img->pixel(3, x, y, z) = img->pixel(3, x, y, z);
|
|
}
|
|
}
|
|
}
|
|
|
|
delete m->image;
|
|
m->image = new_img;
|
|
m->type = (d == 1) ? TextureType_2D : TextureType_3D;
|
|
}
|
|
|
|
|
|
// Color transforms.
|
|
void TexImage::toLinear(float gamma)
|
|
{
|
|
if (m->image == NULL) return;
|
|
if (equal(gamma, 1.0f)) return;
|
|
|
|
detach();
|
|
|
|
m->image->toLinear(0, 3, gamma);
|
|
}
|
|
|
|
void TexImage::toGamma(float gamma)
|
|
{
|
|
if (m->image == NULL) return;
|
|
if (equal(gamma, 1.0f)) return;
|
|
|
|
detach();
|
|
|
|
m->image->toGamma(0, 3, gamma);
|
|
}
|
|
|
|
|
|
static float toSrgb(float f) {
|
|
if (f <= 0.0) f = 0.0f;
|
|
else if (f <= 0.0031308f) f = 12.92f * f;
|
|
else if (f <= 1.0f) f = (powf(f, 0.41666f) * 1.055f) - 0.055f;
|
|
else f = 1.0f;
|
|
return f;
|
|
}
|
|
|
|
void TexImage::toSrgb()
|
|
{
|
|
FloatImage * img = m->image;
|
|
if (img == NULL) return;
|
|
|
|
detach();
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint j = 0; j < count; j++)
|
|
{
|
|
float & r = img->pixel(0, j);
|
|
float & g = img->pixel(1, j);
|
|
float & b = img->pixel(2, j);
|
|
|
|
r = ::toSrgb(r);
|
|
g = ::toSrgb(g);
|
|
b = ::toSrgb(b);
|
|
}
|
|
}
|
|
|
|
static float toXenonSrgb(float f) {
|
|
if (f < 0) f = 0;
|
|
else if (f < (1.0f/16.0f)) f = 4.0f * f;
|
|
else if (f < (1.0f/8.0f)) f = 0.25f + 2.0f * (f - 0.0625f);
|
|
else if (f < 0.5f) f = 0.375f + 1.0f * (f - 0.125f);
|
|
else if (f < 1.0f) f = 0.75f + 0.5f * (f - 0.50f);
|
|
else f = 1.0f;
|
|
return f;
|
|
}
|
|
|
|
void TexImage::toXenonSrgb()
|
|
{
|
|
FloatImage * img = m->image;
|
|
if (img == NULL) return;
|
|
|
|
detach();
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint j = 0; j < count; j++)
|
|
{
|
|
float & r = img->pixel(0, j);
|
|
float & g = img->pixel(1, j);
|
|
float & b = img->pixel(2, j);
|
|
|
|
r = ::toXenonSrgb(r);
|
|
g = ::toXenonSrgb(g);
|
|
b = ::toXenonSrgb(b);
|
|
}
|
|
}
|
|
|
|
|
|
void TexImage::transform(const float w0[4], const float w1[4], const float w2[4], const float w3[4], const float offset[4])
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
Matrix xform(
|
|
Vector4(w0[0], w0[1], w0[2], w0[3]),
|
|
Vector4(w1[0], w1[1], w1[2], w1[3]),
|
|
Vector4(w2[0], w2[1], w2[2], w2[3]),
|
|
Vector4(w3[0], w3[1], w3[2], w3[3]));
|
|
|
|
Vector4 voffset(offset[0], offset[1], offset[2], offset[3]);
|
|
|
|
m->image->transform(0, xform, voffset);
|
|
}
|
|
|
|
void TexImage::swizzle(int r, int g, int b, int a)
|
|
{
|
|
if (m->image == NULL) return;
|
|
if (r == 0 && g == 1 && b == 2 && a == 3) return;
|
|
|
|
detach();
|
|
|
|
m->image->swizzle(0, r, g, b, a);
|
|
}
|
|
|
|
// color * scale + bias
|
|
void TexImage::scaleBias(int channel, float scale, float bias)
|
|
{
|
|
if (m->image == NULL) return;
|
|
if (equal(scale, 1.0f) && equal(bias, 0.0f)) return;
|
|
|
|
detach();
|
|
|
|
m->image->scaleBias(channel, 1, scale, bias);
|
|
}
|
|
|
|
void TexImage::clamp(int channel, float low, float high)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
m->image->clamp(channel, 1, low, high);
|
|
}
|
|
|
|
void TexImage::packNormal()
|
|
{
|
|
scaleBias(0, 0.5f, 0.5f);
|
|
scaleBias(1, 0.5f, 0.5f);
|
|
scaleBias(2, 0.5f, 0.5f);
|
|
}
|
|
|
|
void TexImage::expandNormal()
|
|
{
|
|
scaleBias(0, 2.0f, -1.0f);
|
|
scaleBias(1, 2.0f, -1.0f);
|
|
scaleBias(2, 2.0f, -1.0f);
|
|
}
|
|
|
|
|
|
void TexImage::blend(float red, float green, float blue, float alpha, float t)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
float * a = img->channel(3);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++)
|
|
{
|
|
r[i] = lerp(r[i], red, t);
|
|
g[i] = lerp(g[i], green, t);
|
|
b[i] = lerp(b[i], blue, t);
|
|
a[i] = lerp(a[i], alpha, t);
|
|
}
|
|
}
|
|
|
|
void TexImage::premultiplyAlpha()
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
float * a = img->channel(3);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++)
|
|
{
|
|
r[i] *= a[i];
|
|
g[i] *= a[i];
|
|
b[i] *= a[i];
|
|
}
|
|
}
|
|
|
|
|
|
void TexImage::toGreyScale(float redScale, float greenScale, float blueScale, float alphaScale)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
float sum = redScale + greenScale + blueScale + alphaScale;
|
|
redScale /= sum;
|
|
greenScale /= sum;
|
|
blueScale /= sum;
|
|
alphaScale /= sum;
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
float * a = img->channel(3);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++)
|
|
{
|
|
float grey = r[i] * redScale + g[i] * greenScale + b[i] * blueScale + a[i] * alphaScale;
|
|
a[i] = b[i] = g[i] = r[i] = grey;
|
|
}
|
|
}
|
|
|
|
// Draw colored border.
|
|
void TexImage::setBorder(float r, float g, float b, float a)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
const uint w = img->width();
|
|
const uint h = img->height();
|
|
const uint d = img->depth();
|
|
|
|
for (uint z = 0; z < d; z++)
|
|
{
|
|
for (uint i = 0; i < w; i++)
|
|
{
|
|
img->pixel(0, i, 0, z) = r;
|
|
img->pixel(1, i, 0, z) = g;
|
|
img->pixel(2, i, 0, z) = b;
|
|
img->pixel(3, i, 0, z) = a;
|
|
|
|
img->pixel(0, i, h-1, z) = r;
|
|
img->pixel(1, i, h-1, z) = g;
|
|
img->pixel(2, i, h-1, z) = b;
|
|
img->pixel(3, i, h-1, z) = a;
|
|
}
|
|
|
|
for (uint i = 0; i < h; i++)
|
|
{
|
|
img->pixel(0, 0, i, z) = r;
|
|
img->pixel(1, 0, i, z) = g;
|
|
img->pixel(2, 0, i, z) = b;
|
|
img->pixel(3, 0, i, z) = a;
|
|
|
|
img->pixel(0, w-1, i, z) = r;
|
|
img->pixel(1, w-1, i, z) = g;
|
|
img->pixel(2, w-1, i, z) = b;
|
|
img->pixel(3, w-1, i, z) = a;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Fill image with the given color.
|
|
void TexImage::fill(float red, float green, float blue, float alpha)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
float * a = img->channel(3);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++)
|
|
{
|
|
r[i] = red;
|
|
g[i] = green;
|
|
b[i] = blue;
|
|
a[i] = alpha;
|
|
}
|
|
}
|
|
|
|
|
|
void TexImage::scaleAlphaToCoverage(float coverage, float alphaRef/*= 0.5f*/)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
m->image->scaleAlphaToCoverage(coverage, alphaRef, 3);
|
|
}
|
|
|
|
/*bool TexImage::normalizeRange(float * rangeMin, float * rangeMax)
|
|
{
|
|
if (m->image == NULL) return false;
|
|
|
|
range(0, rangeMin, rangeMax);
|
|
|
|
if (*rangeMin == *rangeMax) {
|
|
// Single color image.
|
|
return false;
|
|
}
|
|
|
|
const float scale = 1.0f / (*rangeMax - *rangeMin);
|
|
const float bias = *rangeMin * scale;
|
|
|
|
if (range.x == 0.0f && range.y == 1.0f) {
|
|
// Already normalized.
|
|
return true;
|
|
}
|
|
|
|
detach();
|
|
|
|
// Scale to range.
|
|
img->scaleBias(0, 4, scale, bias);
|
|
//img->clamp(0, 4, 0.0f, 1.0f);
|
|
|
|
return true;
|
|
}*/
|
|
|
|
// Ideally you should compress/quantize the RGB and M portions independently.
|
|
// Once you have M quantized, you would compute the corresponding RGB and quantize that.
|
|
void TexImage::toRGBM(float range/*= 1*/, float threshold/*= 0.25*/)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
//threshold = clamp(threshold, 1e-6f, 1.0f);
|
|
threshold = 1e-6f;
|
|
float irange = 1.0f / range;
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
float * a = img->channel(3);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
float R = nv::clamp(r[i], 0.0f, 1.0f);
|
|
float G = nv::clamp(g[i], 0.0f, 1.0f);
|
|
float B = nv::clamp(b[i], 0.0f, 1.0f);
|
|
#if 1
|
|
float M = max(max(R, G), max(B, threshold));
|
|
|
|
r[i] = R / M;
|
|
g[i] = G / M;
|
|
b[i] = B / M;
|
|
a[i] = M;
|
|
|
|
#else
|
|
|
|
// The optimal compressor theoretically produces the best results, but unfortunately introduces
|
|
// severe interpolation errors!
|
|
float bestM;
|
|
float bestError = FLT_MAX;
|
|
|
|
int minM = iround(min(R, G, B) * 255.0f);
|
|
|
|
for (int m = minM; m < 256; m++) {
|
|
float fm = float(m) / 255.0f;
|
|
|
|
// Encode.
|
|
int ir = iround(255.0f * nv::clamp(R / fm, 0.0f, 1.0f));
|
|
int ig = iround(255.0f * nv::clamp(G / fm, 0.0f, 1.0f));
|
|
int ib = iround(255.0f * nv::clamp(B / fm, 0.0f, 1.0f));
|
|
|
|
// Decode.
|
|
float fr = (float(ir) / 255.0f) * fm;
|
|
float fg = (float(ig) / 255.0f) * fm;
|
|
float fb = (float(ib) / 255.0f) * fm;
|
|
|
|
// Measure error.
|
|
float error = square(R-fr) + square(G-fg) + square(B-fb);
|
|
|
|
if (error < bestError) {
|
|
bestError = error;
|
|
bestM = fm;
|
|
}
|
|
}
|
|
|
|
M = bestM;
|
|
r[i] = nv::clamp(R / M, 0.0f, 1.0f);
|
|
g[i] = nv::clamp(G / M, 0.0f, 1.0f);
|
|
b[i] = nv::clamp(B / M, 0.0f, 1.0f);
|
|
a[i] = M;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void TexImage::fromRGBM(float range/*= 1*/)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
float * a = img->channel(3);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
float M = a[i] * range;
|
|
|
|
r[i] *= M;
|
|
g[i] *= M;
|
|
b[i] *= M;
|
|
a[i] = 1.0f;
|
|
}
|
|
}
|
|
|
|
|
|
// Y is in the [0, 1] range, while CoCg are in the [-1, 1] range.
|
|
void TexImage::toYCoCg()
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
float * a = img->channel(3);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
float R = r[i];
|
|
float G = g[i];
|
|
float B = b[i];
|
|
|
|
float Y = (2*G + R + B) * 0.25f;
|
|
float Co = (R - B);
|
|
float Cg = (2*G - R - B) * 0.5f;
|
|
|
|
r[i] = Co;
|
|
g[i] = Cg;
|
|
b[i] = 1.0f;
|
|
a[i] = Y;
|
|
}
|
|
}
|
|
|
|
// img.toYCoCg();
|
|
// img.blockScaleCoCg();
|
|
// img.scaleBias(0, 0.5, 0.5);
|
|
// img.scaleBias(1, 0.5, 0.5);
|
|
|
|
// @@ Add support for threshold.
|
|
// We could do something to prevent scale values from adjacent blocks from being too different to each other
|
|
// and minimize bilinear interpolation artifacts.
|
|
void TexImage::blockScaleCoCg(int bits/*= 5*/, float threshold/*= 0.0*/)
|
|
{
|
|
if (m->image == NULL || m->image->depth() != 1) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
const uint w = img->width();
|
|
const uint h = img->height();
|
|
const uint bw = max(1U, w/4);
|
|
const uint bh = max(1U, h/4);
|
|
|
|
for (uint bj = 0; bj < bh; bj++) {
|
|
for (uint bi = 0; bi < bw; bi++) {
|
|
|
|
// Compute per block scale.
|
|
float m = 1.0f / 255.0f;
|
|
for (uint j = 0; j < 4; j++) {
|
|
const uint y = bj*4 + j;
|
|
if (y >= h) continue;
|
|
|
|
for (uint i = 0; i < 4; i++) {
|
|
const uint x = bi*4 + i;
|
|
if (x >= w) continue;
|
|
|
|
float Co = img->pixel(0, x, y, 0);
|
|
float Cg = img->pixel(1, x, y, 0);
|
|
|
|
m = max(m, fabsf(Co));
|
|
m = max(m, fabsf(Cg));
|
|
}
|
|
}
|
|
|
|
float scale = PixelFormat::quantizeCeil(m, bits, 8);
|
|
nvDebugCheck(scale >= m);
|
|
|
|
// Store block scale in blue channel and scale CoCg.
|
|
for (uint j = 0; j < 4; j++) {
|
|
for (uint i = 0; i < 4; i++) {
|
|
uint x = min(bi*4 + i, w);
|
|
uint y = min(bj*4 + j, h);
|
|
|
|
float & Co = img->pixel(0, x, y, 0);
|
|
float & Cg = img->pixel(1, x, y, 0);
|
|
|
|
Co /= scale;
|
|
nvDebugCheck(fabsf(Co) <= 1.0f);
|
|
|
|
Cg /= scale;
|
|
nvDebugCheck(fabsf(Cg) <= 1.0f);
|
|
|
|
img->pixel(2, x, y, 0) = scale;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void TexImage::fromYCoCg()
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
float * a = img->channel(3);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
float Co = r[i];
|
|
float Cg = g[i];
|
|
float scale = b[i] * 0.5f;
|
|
float Y = a[i];
|
|
|
|
Co *= scale;
|
|
Cg *= scale;
|
|
|
|
float R = Y + Co - Cg;
|
|
float G = Y + Cg;
|
|
float B = Y - Co - Cg;
|
|
|
|
r[i] = R;
|
|
g[i] = G;
|
|
b[i] = B;
|
|
a[i] = 1.0f;
|
|
}
|
|
}
|
|
|
|
void TexImage::toLUVW(float range/*= 1.0f*/)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
float irange = 1.0f / range;
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
float * a = img->channel(3);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
float R = nv::clamp(r[i] * irange, 0.0f, 1.0f);
|
|
float G = nv::clamp(g[i] * irange, 0.0f, 1.0f);
|
|
float B = nv::clamp(b[i] * irange, 0.0f, 1.0f);
|
|
|
|
float L = max(sqrtf(R*R + G*G + B*B), 1e-6f); // Avoid division by zero.
|
|
|
|
r[i] = R / L;
|
|
g[i] = G / L;
|
|
b[i] = B / L;
|
|
a[i] = L / sqrtf(3);
|
|
}
|
|
}
|
|
|
|
void TexImage::fromLUVW(float range/*= 1.0f*/)
|
|
{
|
|
// Decompression is the same as in RGBM.
|
|
fromRGBM(range * sqrtf(3));
|
|
}
|
|
|
|
void TexImage::abs(int channel)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
float * c = img->channel(channel);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
c[i] = fabsf(c[i]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
void TexImage::blockLuminanceScale(float scale)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
|
|
//float * r = img->channel(0);
|
|
//float * g = img->channel(1);
|
|
//float * b = img->channel(2);
|
|
//float * a = img->channel(3);
|
|
|
|
const uint w = img->width();
|
|
const uint h = img->height();
|
|
const uint bw = max(1U, w/4);
|
|
const uint bh = max(1U, h/4);
|
|
|
|
Vector3 L = normalize(Vector3(1, 1, 1));
|
|
|
|
for (uint bj = 0; bj < bh; bj++) {
|
|
for (uint bi = 0; bi < bw; bi++) {
|
|
|
|
// Compute block centroid.
|
|
Vector3 centroid(0.0f);
|
|
int count = 0;
|
|
for (uint j = 0; j < 4; j++) {
|
|
const uint y = bj*4 + j;
|
|
if (y >= h) continue;
|
|
|
|
for (uint i = 0; i < 4; i++) {
|
|
const uint x = bi*4 + i;
|
|
if (x >= w) continue;
|
|
|
|
float r = img->pixel(x, y, 0);
|
|
float g = img->pixel(x, y, 1);
|
|
float b = img->pixel(x, y, 2);
|
|
Vector3 rgb(r, g, b);
|
|
|
|
centroid += rgb;
|
|
count++;
|
|
}
|
|
}
|
|
|
|
centroid /= float(count);
|
|
|
|
// Project to luminance plane.
|
|
for (uint j = 0; j < 4; j++) {
|
|
const uint y = bj*4 + j;
|
|
if (y >= h) continue;
|
|
|
|
for (uint i = 0; i < 4; i++) {
|
|
const uint x = bi*4 + i;
|
|
if (x >= w) continue;
|
|
|
|
float & r = img->pixel(x, y, 0);
|
|
float & g = img->pixel(x, y, 1);
|
|
float & b = img->pixel(x, y, 2);
|
|
Vector3 rgb(r, g, b);
|
|
|
|
Vector3 delta = rgb - centroid;
|
|
|
|
delta -= scale * dot(delta, L) * L;
|
|
|
|
r = centroid.x + delta.x;
|
|
g = centroid.y + delta.y;
|
|
b = centroid.z + delta.z;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
*/
|
|
|
|
/*
|
|
void TexImage::toJPEGLS()
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
|
|
const uint count = img->width() * img->height();
|
|
for (uint i = 0; i < count; i++) {
|
|
float R = nv::clamp(r[i], 0.0f, 1.0f);
|
|
float G = nv::clamp(g[i], 0.0f, 1.0f);
|
|
float B = nv::clamp(b[i], 0.0f, 1.0f);
|
|
|
|
r[i] = R-G;
|
|
g[i] = G;
|
|
b[i] = B-G;
|
|
}
|
|
}
|
|
|
|
void TexImage::fromJPEGLS()
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
float * r = img->channel(0);
|
|
float * g = img->channel(1);
|
|
float * b = img->channel(2);
|
|
|
|
const uint count = img->width() * img->height();
|
|
for (uint i = 0; i < count; i++) {
|
|
float R = nv::clamp(r[i], -1.0f, 1.0f);
|
|
float G = nv::clamp(g[i], 0.0f, 1.0f);
|
|
float B = nv::clamp(b[i], -1.0f, 1.0f);
|
|
|
|
r[i] = R+G;
|
|
g[i] = G;
|
|
b[i] = B+G;
|
|
}
|
|
}
|
|
*/
|
|
|
|
|
|
// If dither is true, this uses Floyd-Steinberg dithering method.
|
|
void TexImage::binarize(int channel, float threshold, bool dither)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
|
|
if (!dither) {
|
|
float * c = img->channel(channel);
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
c[i] = float(c[i] > threshold);
|
|
}
|
|
}
|
|
else {
|
|
const uint w = img->width();
|
|
const uint h = img->height();
|
|
const uint d = img->depth();
|
|
|
|
float * row0 = new float[(w+2)];
|
|
float * row1 = new float[(w+2)];
|
|
|
|
// @@ Extend Floyd-Steinberg dithering to 3D properly.
|
|
for (uint z = 0; z < d; z++) {
|
|
memset(row0, 0, sizeof(float)*(w+2));
|
|
memset(row1, 0, sizeof(float)*(w+2));
|
|
|
|
for (uint y = 0; y < h; y++) {
|
|
for (uint x = 0; x < w; x++) {
|
|
|
|
float & f = img->pixel(channel, x, y, 0);
|
|
|
|
// Add error and quantize.
|
|
float qf = float(f + row0[1+x] > threshold);
|
|
|
|
// Compute new error:
|
|
float diff = f - qf;
|
|
|
|
// Store color.
|
|
f = qf;
|
|
|
|
// Propagate new error.
|
|
row0[1+x+1] += (7.0f / 16.0f) * diff;
|
|
row1[1+x-1] += (3.0f / 16.0f) * diff;
|
|
row1[1+x+0] += (5.0f / 16.0f) * diff;
|
|
row1[1+x+1] += (1.0f / 16.0f) * diff;
|
|
}
|
|
|
|
swap(row0, row1);
|
|
memset(row1, 0, sizeof(float)*(w+2));
|
|
}
|
|
}
|
|
|
|
delete [] row0;
|
|
delete [] row1;
|
|
}
|
|
}
|
|
|
|
// Uniform quantizer.
|
|
// Assumes input is in [0, 1] range. Output is in the [0, 1] range, but rounded to the middle of each bin.
|
|
// If exactEndPoints is true, [0, 1] are represented exactly, and the correponding bins are half the size, so quantization is not truly uniform.
|
|
// When dither is true, this uses Floyd-Steinberg dithering.
|
|
void TexImage::quantize(int channel, int bits, bool exactEndPoints, bool dither)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
|
|
float scale, offset;
|
|
if (exactEndPoints) {
|
|
scale = float((1 << bits) - 1);
|
|
offset = 0.0f;
|
|
}
|
|
else {
|
|
scale = float(1 << bits);
|
|
offset = 0.5f;
|
|
}
|
|
|
|
if (!dither) {
|
|
float * c = img->channel(channel);
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
c[i] = floorf(c[i] * scale + offset) / scale;
|
|
}
|
|
}
|
|
else {
|
|
const uint w = img->width();
|
|
const uint h = img->height();
|
|
const uint d = img->depth();
|
|
|
|
float * row0 = new float[(w+2)];
|
|
float * row1 = new float[(w+2)];
|
|
|
|
for (uint z = 0; z < d; z++) {
|
|
memset(row0, 0, sizeof(float)*(w+2));
|
|
memset(row1, 0, sizeof(float)*(w+2));
|
|
|
|
for (uint y = 0; y < h; y++) {
|
|
for (uint x = 0; x < w; x++) {
|
|
|
|
float & f = img->pixel(channel, x, y, 0);
|
|
|
|
// Add error and quantize.
|
|
float qf = floorf((f + row0[1+x]) * scale + offset) / scale;
|
|
|
|
// Compute new error:
|
|
float diff = f - qf;
|
|
|
|
// Store color.
|
|
f = qf;
|
|
|
|
// Propagate new error.
|
|
row0[1+x+1] += (7.0f / 16.0f) * diff;
|
|
row1[1+x-1] += (3.0f / 16.0f) * diff;
|
|
row1[1+x+0] += (5.0f / 16.0f) * diff;
|
|
row1[1+x+1] += (1.0f / 16.0f) * diff;
|
|
}
|
|
|
|
swap(row0, row1);
|
|
memset(row1, 0, sizeof(float)*(w+2));
|
|
}
|
|
}
|
|
|
|
delete [] row0;
|
|
delete [] row1;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
// Set normal map options.
|
|
void TexImage::toNormalMap(float sm, float medium, float big, float large)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
const Vector4 filterWeights(sm, medium, big, large);
|
|
|
|
const FloatImage * img = m->image;
|
|
m->image = nv::createNormalMap(img, (FloatImage::WrapMode)m->wrapMode, filterWeights);
|
|
|
|
#pragma NV_MESSAGE("TODO: Pack and expand normals explicitly?")
|
|
m->image->packNormals(0);
|
|
|
|
delete img;
|
|
|
|
m->isNormalMap = true;
|
|
}
|
|
|
|
void TexImage::normalizeNormalMap()
|
|
{
|
|
if (m->image == NULL) return;
|
|
if (!m->isNormalMap) return;
|
|
|
|
detach();
|
|
|
|
nv::normalizeNormalMap(m->image);
|
|
}
|
|
|
|
void TexImage::transformNormals(NormalTransform xform)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
img->expandNormals(0);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
float & x = img->pixel(0, i);
|
|
float & y = img->pixel(1, i);
|
|
float & z = img->pixel(2, i);
|
|
Vector3 n(x, y, z);
|
|
|
|
n = normalizeSafe(n, Vector3(0.0f), 0.0f);
|
|
|
|
if (xform == NormalTransform_Orthographic) {
|
|
n.z = 0.0f;
|
|
}
|
|
else if (xform == NormalTransform_Stereographic) {
|
|
n.x = n.x / (1 + n.z);
|
|
n.y = n.y / (1 + n.z);
|
|
n.z = 0.0f;
|
|
}
|
|
else if (xform == NormalTransform_Paraboloid) {
|
|
float a = (n.x * n.x) + (n.y * n.y);
|
|
float b = n.z;
|
|
float c = -1.0f;
|
|
float discriminant = b * b - 4.0f * a * c;
|
|
float t = (-b + sqrtf(discriminant)) / (2.0f * a);
|
|
n.x = n.x * t;
|
|
n.y = n.y * t;
|
|
n.z = 0.0f;
|
|
}
|
|
else if (xform == NormalTransform_Quartic) {
|
|
// Use Newton's method to solve equation:
|
|
// f(t) = 1 - zt - (x^2+y^2)t^2 + x^2y^2t^4 = 0
|
|
// f'(t) = - z - 2(x^2+y^2)t + 4x^2y^2t^3
|
|
|
|
// Initial approximation:
|
|
float a = (n.x * n.x) + (n.y * n.y);
|
|
float b = n.z;
|
|
float c = -1.0f;
|
|
float discriminant = b * b - 4.0f * a * c;
|
|
float t = (-b + sqrtf(discriminant)) / (2.0f * a);
|
|
|
|
float d = fabs(n.z * t - (1 - n.x*n.x*t*t) * (1 - n.y*n.y*t*t));
|
|
|
|
while (d > 0.0001) {
|
|
float ft = 1 - n.z * t - (n.x*n.x + n.y*n.y)*t*t + n.x*n.x*n.y*n.y*t*t*t*t;
|
|
float fit = - n.z - 2*(n.x*n.x + n.y*n.y)*t + 4*n.x*n.x*n.y*n.y*t*t*t;
|
|
t -= ft / fit;
|
|
d = fabs(n.z * t - (1 - n.x*n.x*t*t) * (1 - n.y*n.y*t*t));
|
|
};
|
|
|
|
n.x = n.x * t;
|
|
n.y = n.y * t;
|
|
n.z = 0.0f;
|
|
}
|
|
/*else if (xform == NormalTransform_DualParaboloid) {
|
|
|
|
}*/
|
|
|
|
x = n.x;
|
|
y = n.y;
|
|
z = n.z;
|
|
}
|
|
|
|
img->packNormals(0);
|
|
}
|
|
|
|
void TexImage::reconstructNormals(NormalTransform xform)
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
FloatImage * img = m->image;
|
|
img->expandNormals(0);
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
float & x = img->pixel(0, i);
|
|
float & y = img->pixel(1, i);
|
|
float & z = img->pixel(2, i);
|
|
Vector3 n(x, y, z);
|
|
|
|
if (xform == NormalTransform_Orthographic) {
|
|
n.z = sqrtf(1 - nv::clamp(n.x * n.x + n.y * n.y, 0.0f, 1.0f));
|
|
}
|
|
else if (xform == NormalTransform_Stereographic) {
|
|
float denom = 2.0f / (1 + nv::clamp(n.x * n.x + n.y * n.y, 0.0f, 1.0f));
|
|
n.x *= denom;
|
|
n.y *= denom;
|
|
n.z = denom - 1;
|
|
}
|
|
else if (xform == NormalTransform_Paraboloid) {
|
|
n.x = n.x;
|
|
n.y = n.y;
|
|
n.z = 1.0f - nv::clamp(n.x * n.x + n.y * n.y, 0.0f, 1.0f);
|
|
n = normalizeSafe(n, Vector3(0.0f), 0.0f);
|
|
}
|
|
else if (xform == NormalTransform_Quartic) {
|
|
n.x = n.x;
|
|
n.y = n.y;
|
|
n.z = nv::clamp((1 - n.x * n.x) * (1 - n.y * n.y), 0.0f, 1.0f);
|
|
n = normalizeSafe(n, Vector3(0.0f), 0.0f);
|
|
}
|
|
/*else if (xform == NormalTransform_DualParaboloid) {
|
|
|
|
}*/
|
|
|
|
x = n.x;
|
|
y = n.y;
|
|
z = n.z;
|
|
}
|
|
|
|
img->packNormals(0);
|
|
}
|
|
|
|
void TexImage::toCleanNormalMap()
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
m->image->expandNormals(0);
|
|
|
|
const uint count = m->image->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
float x = m->image->pixel(0, i);
|
|
float y = m->image->pixel(1, i);
|
|
|
|
m->image->pixel(2, i) = x*x + y*y;
|
|
}
|
|
|
|
m->image->packNormals(0);
|
|
}
|
|
|
|
// [-1,1] -> [ 0,1]
|
|
void TexImage::packNormals() {
|
|
if (m->image == NULL) return;
|
|
detach();
|
|
m->image->packNormals(0);
|
|
}
|
|
|
|
// [ 0,1] -> [-1,1]
|
|
void TexImage::expandNormals() {
|
|
if (m->image == NULL) return;
|
|
detach();
|
|
m->image->expandNormals(0);
|
|
}
|
|
|
|
|
|
void TexImage::flipX()
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
m->image->flipX();
|
|
}
|
|
|
|
void TexImage::flipY()
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
m->image->flipY();
|
|
}
|
|
|
|
void TexImage::flipZ()
|
|
{
|
|
if (m->image == NULL) return;
|
|
|
|
detach();
|
|
|
|
m->image->flipZ();
|
|
}
|
|
|
|
bool TexImage::copyChannel(const TexImage & srcImage, int srcChannel)
|
|
{
|
|
return copyChannel(srcImage, srcChannel, srcChannel);
|
|
}
|
|
|
|
bool TexImage::copyChannel(const TexImage & srcImage, int srcChannel, int dstChannel)
|
|
{
|
|
if (srcChannel < 0 || srcChannel > 3 || dstChannel < 0 || dstChannel > 3) return false;
|
|
|
|
FloatImage * dst = m->image;
|
|
const FloatImage * src = srcImage.m->image;
|
|
|
|
if (!sameLayout(dst, src)) {
|
|
return false;
|
|
}
|
|
nvDebugCheck(dst->componentCount() == 4 && src->componentCount() == 4);
|
|
|
|
detach();
|
|
|
|
memcpy(dst->channel(dstChannel), src->channel(srcChannel), dst->pixelCount()*sizeof(float));
|
|
|
|
return true;
|
|
}
|
|
|
|
bool TexImage::addChannel(const TexImage & srcImage, int srcChannel, int dstChannel, float scale)
|
|
{
|
|
if (srcChannel < 0 || srcChannel > 3 || dstChannel < 0 || dstChannel > 3) return false;
|
|
|
|
FloatImage * dst = m->image;
|
|
const FloatImage * src = srcImage.m->image;
|
|
|
|
if (!sameLayout(dst, src)) {
|
|
return false;
|
|
}
|
|
nvDebugCheck(dst->componentCount() == 4 && src->componentCount() == 4);
|
|
|
|
detach();
|
|
|
|
const uint w = src->width();
|
|
const uint h = src->height();
|
|
|
|
float * d = dst->channel(dstChannel);
|
|
const float * s = src->channel(srcChannel);
|
|
|
|
const uint count = src->pixelCount();
|
|
for (uint i = 0; i < count; i++) {
|
|
d[i] += s[i] * scale;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
float nvtt::rmsError(const TexImage & reference, const TexImage & image)
|
|
{
|
|
return nv::rmsColorError(reference.m->image, image.m->image, reference.alphaMode() == nvtt::AlphaMode_Transparency);
|
|
}
|
|
|
|
|
|
float nvtt::rmsAlphaError(const TexImage & reference, const TexImage & image)
|
|
{
|
|
return nv::rmsAlphaError(reference.m->image, image.m->image);
|
|
}
|
|
|
|
|
|
float nvtt::cieLabError(const TexImage & reference, const TexImage & image)
|
|
{
|
|
return nv::cieLabError(reference.m->image, image.m->image);
|
|
}
|
|
|
|
float nvtt::angularError(const TexImage & reference, const TexImage & image)
|
|
{
|
|
//return nv::averageAngularError(reference.m->image, image.m->image);
|
|
return nv::rmsAngularError(reference.m->image, image.m->image);
|
|
}
|
|
|
|
|
|
TexImage nvtt::diff(const TexImage & reference, const TexImage & image, float scale)
|
|
{
|
|
const FloatImage * ref = reference.m->image;
|
|
const FloatImage * img = image.m->image;
|
|
|
|
if (!sameLayout(img, ref)) {
|
|
return TexImage();
|
|
}
|
|
|
|
nvDebugCheck(img->componentCount() == 4);
|
|
nvDebugCheck(ref->componentCount() == 4);
|
|
|
|
nvtt::TexImage diffImage;
|
|
FloatImage * diff = diffImage.m->image = new FloatImage;
|
|
diff->allocate(4, img->width(), img->height(), img->depth());
|
|
|
|
const uint count = img->pixelCount();
|
|
for (uint i = 0; i < count; i++)
|
|
{
|
|
float r0 = img->pixel(0, i);
|
|
float g0 = img->pixel(1, i);
|
|
float b0 = img->pixel(2, i);
|
|
//float a0 = img->pixel(3, i);
|
|
float r1 = ref->pixel(0, i);
|
|
float g1 = ref->pixel(1, i);
|
|
float b1 = ref->pixel(2, i);
|
|
float a1 = ref->pixel(3, i);
|
|
|
|
float dr = r0 - r1;
|
|
float dg = g0 - g1;
|
|
float db = b0 - b1;
|
|
//float da = a0 - a1;
|
|
|
|
if (reference.alphaMode() == nvtt::AlphaMode_Transparency)
|
|
{
|
|
dr *= a1;
|
|
dg *= a1;
|
|
db *= a1;
|
|
}
|
|
|
|
diff->pixel(0, i) = dr * scale;
|
|
diff->pixel(1, i) = dg * scale;
|
|
diff->pixel(2, i) = db * scale;
|
|
diff->pixel(3, i) = a1;
|
|
}
|
|
|
|
return diffImage;
|
|
}
|
|
|
|
|
|
|