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/* Copyright 2016 Software Freedom Conservancy Inc.
* Copyright 2017 Jens Georg <mail@jensge.org>
*
* This software is licensed under the GNU LGPL (version 2.1 or later).
* See the COPYING file in this distribution.
*/
#include "shotwell-graphics-processor.h"
static inline void _pixel_transformer_apply_transformations (PixelTransformer* self, RGBAnalyticPixel* p, RGBAnalyticPixel* result) {
PixelFormat current_format = PIXEL_FORMAT_RGB;
RGBAnalyticPixel p_rgb = {p->red, p->green, p->blue };
HSVAnalyticPixel p_hsv = {0.0f, 0.0f, 0.0f};
gint i = 0;
for (i = 0; i < self->optimized_slots_used; i++) {
PixelTransformation* trans = NULL;
PixelFormat preferred_format;
trans = self->optimized_transformations[i];
preferred_format = pixel_transformation_get_preferred_format (trans);
if (preferred_format == PIXEL_FORMAT_RGB) {
RGBAnalyticPixel _tmp14_ = {0};
if (current_format == PIXEL_FORMAT_HSV) {
hsv_analytic_pixel_to_rgb (&p_hsv, &p_rgb);
current_format = PIXEL_FORMAT_RGB;
}
pixel_transformation_transform_pixel_rgb (trans, &p_rgb, &_tmp14_);
p_rgb.red =_tmp14_.red;
p_rgb.green =_tmp14_.green;
p_rgb.blue =_tmp14_.blue;
} else {
HSVAnalyticPixel _tmp19_ = {0};
if (current_format == PIXEL_FORMAT_RGB) {
rgb_analytic_pixel_to_hsv (&p_rgb, &p_hsv);
current_format = PIXEL_FORMAT_HSV;
}
pixel_transformation_transform_pixel_hsv (trans, &p_hsv, &_tmp19_);
p_hsv.hue = _tmp19_.hue;
p_hsv.saturation = _tmp19_.saturation;
p_hsv.light_value = _tmp19_.light_value;
}
}
if (current_format == PIXEL_FORMAT_HSV) {
hsv_analytic_pixel_to_rgb (&p_hsv, &p_rgb);
}
result->red = p_rgb.red;
result->green = p_rgb.green;
result->blue = p_rgb.blue;
}
void pixel_transformer_apply_transformations (PixelTransformer* self, RGBAnalyticPixel* p, RGBAnalyticPixel* result) {
_pixel_transformer_apply_transformations (self, p, result);
}
void pixel_transformer_apply_transformation (PixelTransformer* self,
guint row,
gint rowstride,
gint rowbytes,
gint n_channels,
guchar* source_pixels, int source_pixels_length1,
guchar* dest_pixels, int dest_pixels_length1) {
guint row_start_index = row * rowstride;
guint row_end_index = row_start_index + rowbytes;
guint i = 0;
for (i = row_start_index; i < row_end_index; i += n_channels) {
RGBAnalyticPixel current_pixel = { rgb_lookup_table[source_pixels[i]],
rgb_lookup_table[source_pixels[i+1]],
rgb_lookup_table[source_pixels[i+2]] };
RGBAnalyticPixel transformed_pixel = { 0.0f, 0.0f, 0.0f };
_pixel_transformer_apply_transformations (self, ¤t_pixel, &transformed_pixel);
dest_pixels[i] = (guchar) (transformed_pixel.red * 255.0f);
dest_pixels[i+1] = (guchar) (transformed_pixel.green * 255.0f);
dest_pixels[i+2] = (guchar) (transformed_pixel.blue * 255.0f);
}
}
void hsv_analytic_pixel_to_rgb (HSVAnalyticPixel *self, RGBAnalyticPixel* result) {
if (self->saturation == 0.0f) {
result->red = self->light_value;
result->green = self->light_value;
result->blue = self->light_value;
return;
}
float hue_denorm = self->hue * 360.0f;
if (hue_denorm == 360.0f)
hue_denorm = 0.0f;
float hue_hexant = hue_denorm / 60.0f;
int hexant_i_part = (int) hue_hexant;
float hexant_f_part = hue_hexant - ((float) hexant_i_part);
float p = self->light_value * (1.0f - self->saturation);
float q = self->light_value * (1.0f - (self->saturation * hexant_f_part));
float t = self->light_value * (1.0f - (self->saturation * (1.0f - hexant_f_part)));
switch (hexant_i_part) {
case 0:
result->red = self->light_value; result->green = t; result->blue = p;
break;
case 1:
result->red = q; result->green = self->light_value; result->blue = p;
break;
case 2:
result->red = p; result->green = self->light_value; result->blue = t;
break;
case 3:
result->red = p; result->green = q; result->blue = self->light_value;
break;
case 4:
result->red = t; result->green = p; result->blue = self->light_value;
break;
case 5:
result->red = self->light_value; result->green = p; result->blue = q;
break;
default:
g_assert_not_reached();
}
}
void hsv_analytic_pixel_init_from_rgb (HSVAnalyticPixel *self, RGBAnalyticPixel* p) {
gfloat max_component = MAX(MAX(p->red, p->green), p->blue);
gfloat min_component = MIN(MIN(p->red, p->green), p->blue);
self->light_value = max_component;
gfloat delta = max_component - min_component;
self->saturation = (max_component != 0.0f) ? ((delta) / max_component) : 0.0f;
if (self->saturation == 0.0f) {
self->hue = 0.0f;
return;
}
if (p->red == max_component) {
self->hue = (p->green - p->blue) / delta;
} else if (p->green == max_component) {
self->hue = 2.0f + ((p->blue - p->red) / delta);
} else if (p->blue == max_component) {
self->hue = 4.0f + ((p->red - p->green) / delta);
}
self->hue *= 60.0f;
if (self->hue < 0.0f) {
self->hue += 360.0f;
}
self->hue /= 360.0f;
self->hue = CLAMP(self->hue, 0.0f, 1.0f);
self->saturation = CLAMP(self->saturation, 0.0f, 1.0f);
self->light_value = CLAMP(self->light_value, 0.0f, 1.0f);
}
void rgb_transformation_real_transform_pixel_rgb (PixelTransformation* base, RGBAnalyticPixel* p, RGBAnalyticPixel* result) {
RGBTransformation *self = RGB_TRANSFORMATION(base);
result->red = CLAMP(p->red * self->matrix_entries[0] +
p->green * self->matrix_entries[1] +
p->blue * self->matrix_entries[2] +
self->matrix_entries[3], 0.0f, 1.0f);
result->green = CLAMP(p->red * self->matrix_entries[4] +
p->green * self->matrix_entries[5] +
p->blue * self->matrix_entries[6] +
self->matrix_entries[7], 0.0f, 1.0f);
result->blue = CLAMP(p->red * self->matrix_entries[8] +
p->green * self->matrix_entries[9] +
p->blue * self->matrix_entries[10] +
self->matrix_entries[11], 0.0f, 1.0f);
}
void hsv_transformation_real_transform_pixel_hsv (PixelTransformation* base, HSVAnalyticPixel* pixel, HSVAnalyticPixel* result) {
HSVTransformation *self = HSV_TRANSFORMATION(base);
result->hue = pixel->hue;
result->saturation = pixel->saturation;
result->light_value = CLAMP(self->remap_table[(int) (pixel->light_value * 255.0f)], 0.0f, 1.0f);
}
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