333 lines
11 KiB
C++
333 lines
11 KiB
C++
#include <stdexcept> /* std::domain_error */
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#include <limits> /* std::numeric_limits */
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#include "igs_color_rgb_hsv.h"
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namespace {
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void pixel_rgba_(const double red_in, const double gre_in, const double blu_in,
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const double alp_in, const double hue_noise // -0.5...0.5
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,
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const double sat_noise, const double val_noise // -0.5...0.5
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,
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const double alp_noise, double &red_out, double &gre_out,
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double &blu_out, double &alp_out) {
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double hue, sat, val, alp;
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igs::color::rgb_to_hsv(red_in, gre_in, blu_in, hue, sat, val);
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alp = alp_in;
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if (0.0 != hue_noise) {
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hue += 360.0 * hue_noise;
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while (hue < 0.0) {
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hue += 360.0;
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}
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while (360.0 <= hue) {
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hue -= 360.0;
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}
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}
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if (0.0 != sat_noise) {
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sat += sat_noise;
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if (sat < 0.0) {
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sat = 0.0;
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} else if (1.0 < sat) {
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sat = 1.0;
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}
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}
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if (0.0 != val_noise) {
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val += val_noise;
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if (val < 0.0) {
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val = 0.0;
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} else if (1.0 < val) {
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val = 1.0;
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}
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}
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if (0.0 != alp_noise) {
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alp += alp_noise;
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alp = (alp < 0.0) ? 0.0 : ((1.0 < alp) ? 1.0 : alp);
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}
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igs::color::hsv_to_rgb(hue, sat, val, red_out, gre_out, blu_out);
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alp_out = alp;
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}
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}
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//------------------------------------------------------------
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namespace {
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class noise_ref_ {
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public:
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noise_ref_(const unsigned char *array, const int height, const int width,
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const int channels, const int bits, const int xoffset,
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const int yoffset, const int zz);
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double noise(int xx // 0...width-1...
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,
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int yy // 0...height-1...
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) const; // return range is 0...1
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private:
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const unsigned char *array_;
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const int height_;
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const int width_;
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const int channels_;
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const int bits_;
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const double bmax_;
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const int xoffset_;
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const int yoffset_;
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const int zz_;
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/* copy constructorを無効化 */
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noise_ref_(const noise_ref_ &);
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/* 代入演算子を無効化 */
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noise_ref_ &operator=(const noise_ref_ &);
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};
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noise_ref_::noise_ref_(const unsigned char *array, const int height,
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const int width, const int channels, const int bits,
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const int xoffset, const int yoffset, const int zz)
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: array_(array)
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, height_(height)
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, width_(width)
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, channels_(channels)
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, bits_(bits)
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, bmax_(static_cast<double>((1 << bits) - 1))
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, xoffset_(xoffset)
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, yoffset_(yoffset)
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, zz_(zz) {
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if (0 == array) {
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throw std::domain_error("noise_ref_ no data");
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}
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if ((zz < 0) || (channels <= zz)) {
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throw std::domain_error("noise_ref_ bad zz");
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}
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if ((std::numeric_limits<unsigned char>::digits != this->bits_) &&
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(std::numeric_limits<unsigned short>::digits != this->bits_)) {
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throw std::domain_error("noise_ref_ bad bits");
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}
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}
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double noise_ref_::noise(int xx, int yy) const {
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xx -= this->xoffset_;
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yy -= this->yoffset_;
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while (xx < 0) {
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xx += this->width_;
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}
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while (this->width_ <= xx) {
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xx -= this->width_;
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}
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while (yy < 0) {
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yy += this->height_;
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}
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while (this->height_ <= yy) {
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yy -= this->height_;
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}
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if (std::numeric_limits<unsigned char>::digits == this->bits_) {
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return (*(this->array_ + this->channels_ * this->width_ * yy +
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this->channels_ * xx + this->zz_)) /
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this->bmax_;
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}
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return (*(reinterpret_cast<const unsigned short *>(this->array_) +
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this->channels_ * this->width_ * yy + this->channels_ * xx +
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this->zz_)) /
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this->bmax_;
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}
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}
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//------------------------------------------------------------
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#include "igs_ifx_common.h" /* igs::image::rgba */
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#include "igs_hsv_add.h"
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namespace {
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/* raster画像にノイズをのせるtemplate */
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template <class IT, class RT>
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void change_template_(
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IT *image_array, const int height, const int width, const int channels
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,
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const noise_ref_ &noi
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,
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const RT *ref /* 求める画像(out)と同じ高さ、幅、チャンネル数 */
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,
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const int ref_mode /* 0=R,1=G,2=B,3=A,4=Luminance,5=Nothing */
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,
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const double offset, const double hue_scale, const double sat_scale,
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const double val_scale, const double alp_scale
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,
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const bool add_blend_sw) {
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const int t_max = std::numeric_limits<IT>::max();
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const double div_val = static_cast<double>(t_max);
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const double mul_val = static_cast<double>(t_max) + 0.999999;
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const int r_max = std::numeric_limits<RT>::max();
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if (igs::image::rgba::siz == channels) {
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using namespace igs::image::rgba;
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for (int yy = 0; yy < height; ++yy) {
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for (int xx = 0; xx < width; ++xx, image_array += channels) {
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/* 変化量初期値 */
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double refv = 1.0;
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/* 参照画像あればピクセル単位の画像変化量を得る */
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if (ref != 0) {
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refv *= igs::color::ref_value(ref, channels, r_max, ref_mode);
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ref += channels; /* continue;の前に行うこと */
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}
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/* 加算合成で、Alpha値ゼロならRGB値を計算する必要はない */
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if (add_blend_sw && (0 == image_array[alp])) {
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continue;
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}
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/* 加算合成でなくAlpha合成の時は、
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Alpha値がゼロでもRGB値は存在する(してもよい) */
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/* HSVAそれぞれに対するオフセット済ノイズ値 */
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refv *= (noi.noise(xx, yy) - offset);
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/* マスクSWがON、なら変化をMask */
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if (add_blend_sw && (image_array[alp] < t_max)) {
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refv *= static_cast<double>(image_array[alp]) / div_val;
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}
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/* RGBAにHSVAノイズを加える */
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double rr, gg, bb, aa;
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pixel_rgba_(static_cast<double>(image_array[red]) / div_val,
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static_cast<double>(image_array[gre]) / div_val,
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static_cast<double>(image_array[blu]) / div_val,
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static_cast<double>(image_array[alp]) / div_val,
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refv * hue_scale, refv * sat_scale, refv * val_scale,
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refv * alp_scale, rr, gg, bb, aa);
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/* 変化後の値を戻す */
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image_array[red] = static_cast<IT>(rr * mul_val);
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image_array[gre] = static_cast<IT>(gg * mul_val);
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image_array[blu] = static_cast<IT>(bb * mul_val);
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image_array[alp] = static_cast<IT>(aa * mul_val);
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}
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}
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} else if (igs::image::rgb::siz == channels) {
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using namespace igs::image::rgb;
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for (int yy = 0; yy < height; ++yy) {
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for (int xx = 0; xx < width; ++xx, image_array += channels) {
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/* 変化量初期値 */
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double refv = 1.0;
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/* 参照画像あればピクセル単位の画像変化量を得る */
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if (ref != 0) {
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refv *= igs::color::ref_value(ref, channels, r_max, ref_mode);
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ref += channels; /* continue;の前に行うこと */
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}
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/* HSVそれぞれに対するオフセット済ノイズ値 */
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refv *= (noi.noise(xx, yy) - offset);
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/* RGBにHSVノイズを加える */
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double rr, gg, bb, aa;
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pixel_rgba_(static_cast<double>(image_array[red]) / div_val,
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static_cast<double>(image_array[gre]) / div_val,
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static_cast<double>(image_array[blu]) / div_val, 1.0,
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refv * hue_scale, refv * sat_scale, refv * val_scale, 0.0,
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rr, gg, bb, aa);
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/* 変化後の値を戻す */
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image_array[red] = static_cast<IT>(rr * mul_val);
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image_array[gre] = static_cast<IT>(gg * mul_val);
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image_array[blu] = static_cast<IT>(bb * mul_val);
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}
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}
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} else if (1 == channels) { /* grayscale */
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for (int yy = 0; yy < height; ++yy) {
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for (int xx = 0; xx < width; ++xx, ++image_array) {
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/* 変化量初期値 */
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double refv = 1.0;
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/* 参照画像あればピクセル単位の画像変化量を得る */
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if (ref != 0) {
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refv *= igs::color::ref_value(ref, channels, r_max, ref_mode);
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ref += channels; /* continue;の前に行うこと */
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}
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/* Lに対するオフセット済ノイズ値 */
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refv *= (noi.noise(xx, yy) - offset);
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/* 変化なしなら次へ */
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if (0.0 == refv * val_scale) {
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continue;
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}
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/* GrayscaleにLノイズを加える */
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double val =
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static_cast<double>(image_array[0]) / div_val + refv * val_scale;
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val = (val < 0.0) ? 0.0 : ((1.0 < val) ? 1.0 : val);
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/* 変化後の値を戻す */
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image_array[0] = static_cast<IT>(val * mul_val);
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}
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}
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}
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}
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}
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void igs::hsv_add::change(
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unsigned char *image_array, const int height, const int width,
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const int channels, const int bits
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,
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const unsigned char *noi_image_array, const int noi_height,
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const int noi_width, const int noi_channels, const int noi_bits
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,
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const unsigned char *ref /* 求める画像と同じ高、幅、channels数 */
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,
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const int ref_bits /* refがゼロのときはここもゼロ */
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,
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const int ref_mode /* 0=R,1=G,2=B,3=A,4=Luminance,5=Nothing */
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,
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const int xoffset, const int yoffset, const int from_rgba,
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const double offset, const double hue_scale, const double sat_scale,
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const double val_scale, const double alp_scale
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,
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const bool add_blend_sw) {
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if ((0.0 == hue_scale) && (0.0 == sat_scale) && (0.0 == val_scale) &&
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(0.0 == alp_scale)) {
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return;
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}
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if ((igs::image::rgba::siz != channels) &&
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(igs::image::rgb::siz != channels) && (1 != channels) /* grayscale */
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) {
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throw std::domain_error("Bad channels,Not rgba/rgb/grayscale");
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}
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/* ノイズ参照画像を作成する */
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noise_ref_ noi(noi_image_array
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,
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noi_height, noi_width, noi_channels, noi_bits
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,
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xoffset, yoffset, from_rgba);
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/* rgb(a)画像にhsv(a)でドットノイズを加える */
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if ((std::numeric_limits<unsigned char>::digits == bits) &&
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((std::numeric_limits<unsigned char>::digits == ref_bits) ||
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(0 == ref_bits))) {
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change_template_(image_array, height, width, channels, noi, ref, ref_mode,
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offset, hue_scale, sat_scale, val_scale, alp_scale,
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add_blend_sw);
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} else if ((std::numeric_limits<unsigned short>::digits == bits) &&
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((std::numeric_limits<unsigned char>::digits == ref_bits) ||
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(0 == ref_bits))) {
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change_template_(reinterpret_cast<unsigned short *>(image_array), height,
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width, channels, noi, ref, ref_mode, offset, hue_scale,
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sat_scale, val_scale, alp_scale, add_blend_sw);
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} else if ((std::numeric_limits<unsigned short>::digits == bits) &&
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(std::numeric_limits<unsigned short>::digits == ref_bits)) {
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change_template_(
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reinterpret_cast<unsigned short *>(image_array), height, width,
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channels, noi, reinterpret_cast<const unsigned short *>(ref), ref_mode,
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offset, hue_scale, sat_scale, val_scale, alp_scale, add_blend_sw);
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} else if ((std::numeric_limits<unsigned char>::digits == bits) &&
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(std::numeric_limits<unsigned short>::digits == ref_bits)) {
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change_template_(image_array, height, width, channels, noi,
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reinterpret_cast<const unsigned short *>(ref), ref_mode,
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offset, hue_scale, sat_scale, val_scale, alp_scale,
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add_blend_sw);
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} else {
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throw std::domain_error("Bad bits,Not uchar/ushort");
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}
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}
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