139 lines
3.8 KiB
C++
139 lines
3.8 KiB
C++
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#include "stdfx.h"
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#include "tfxparam.h"
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#include "tpixelutils.h"
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#include "globalcontrollablefx.h"
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class Bright_ContFx final : public GlobalControllableFx {
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FX_PLUGIN_DECLARATION(Bright_ContFx)
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TRasterFxPort m_input;
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TDoubleParamP m_bright;
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TDoubleParamP m_contrast;
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public:
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Bright_ContFx() : m_bright(0.0), m_contrast(0.0) {
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bindParam(this, "brightness", m_bright);
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bindParam(this, "contrast", m_contrast);
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m_bright->setValueRange(-127, 127);
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m_contrast->setValueRange(-127, 127);
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addInputPort("Source", m_input);
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}
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~Bright_ContFx(){};
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bool canHandle(const TRenderSettings &info, double frame) override {
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return true;
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}
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bool doGetBBox(double frame, TRectD &bBox,
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const TRenderSettings &info) override {
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if (!m_input.isConnected()) {
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bBox = TRectD();
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return false;
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}
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return m_input->doGetBBox(frame, bBox, info);
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};
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void doCompute(TTile &tile, double frame, const TRenderSettings &) override;
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};
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//===================================================================
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template <typename PIXEL, typename T>
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void my_compute_lut(double contrast, double brightness, std::vector<T> &lut) {
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int i;
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double value, nvalue, power;
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int half_maxChannelValue = tfloor(PIXEL::maxChannelValue / 2.0);
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int lutSize = PIXEL::maxChannelValue + 1;
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for (i = 0; i < lutSize; i++) {
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value = i / double(PIXEL::maxChannelValue);
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/*brightness*/
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if (brightness < 0.0)
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value = value * (1.0 + brightness);
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else
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value = value + ((1.0 - value) * brightness);
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/*contrast*/
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if (contrast < 0.0) {
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if (value > 0.5)
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nvalue = 1.0 - value;
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else
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nvalue = value;
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if (nvalue < 0.0) nvalue = 0.0;
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nvalue = 0.5 * pow(nvalue * 2.0, (double)(1.0 + contrast));
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if (value > 0.5)
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value = 1.0 - nvalue;
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else
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value = nvalue;
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} else {
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if (value > 0.5)
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nvalue = 1.0 - value;
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else
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nvalue = value;
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if (nvalue < 0.0) nvalue = 0.0;
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power = (contrast == 1.0) ? half_maxChannelValue : 1.0 / (1.0 - contrast);
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nvalue = 0.5 * pow(2.0 * nvalue, power);
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if (value > 0.5)
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value = 1.0 - nvalue;
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else
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value = nvalue;
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}
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lut[i] = (int)(value * PIXEL::maxChannelValue);
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}
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}
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template <typename PIXEL, typename CHANNEL_TYPE>
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void doBrightnessContrast(TRasterPT<PIXEL> ras, double contrast,
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double brightness) {
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int lx = ras->getLx();
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int ly = ras->getLy();
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std::vector<CHANNEL_TYPE> lut(PIXEL::maxChannelValue + 1);
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my_compute_lut<PIXEL, CHANNEL_TYPE>(contrast, brightness, lut);
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int j;
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ras->lock();
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for (j = 0; j < ly; j++) {
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PIXEL *pix = ras->pixels(j);
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PIXEL *endPix = pix + lx;
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while (pix < endPix) {
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if (pix->m) {
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*pix = depremultiply(*pix);
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pix->r = lut[pix->r];
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pix->g = lut[pix->g];
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pix->b = lut[pix->b];
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pix->m = pix->m;
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*pix = premultiply(*pix);
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}
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pix++;
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}
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}
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ras->unlock();
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}
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void Bright_ContFx::doCompute(TTile &tile, double frame,
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const TRenderSettings &ri) {
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if (!m_input.isConnected()) return;
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m_input->compute(tile, frame, ri);
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double brightness = m_bright->getValue(frame) / 127.0;
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double contrast = m_contrast->getValue(frame) / 127.0;
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if (contrast > 1) contrast = 1;
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if (contrast < -1) contrast = -1;
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TRaster32P raster32 = tile.getRaster();
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if (raster32)
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doBrightnessContrast<TPixel32, UCHAR>(raster32, contrast, brightness);
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else {
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TRaster64P raster64 = tile.getRaster();
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if (raster64)
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doBrightnessContrast<TPixel64, USHORT>(raster64, contrast, brightness);
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else
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throw TException("Brightness&Contrast: unsupported Pixel Type");
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}
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}
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FX_PLUGIN_IDENTIFIER(Bright_ContFx, "brightContFx")
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