Image.cpp

#include "Image.h"
#include "Utils.h"
#include <iostream>
#include <cassert>
#include <stdlib.h>

Image_t* Image_new(int width, int height, int channels, float *data) {
	Image_t* img;

	img = (Image_t*) malloc(sizeof(Image_t));

	Image_setWidth(img, width);
	Image_setHeight(img, height);
	Image_setChannels(img, channels);
	Image_setPitch(img, width * channels);

	Image_setData(img, data);
	return img;
}

Image_t* Image_new(int width, int height, int channels) {
	float *data = (float*) malloc(sizeof(float) * width * height * channels);
	return Image_new(width, height, channels, data);
}

Image_t* Image_new(int width, int height) {
	return Image_new(width, height, Image_channels);
}

void Image_delete(Image_t* img) {
	if (img != NULL) {
		if (Image_getData(img) != NULL) {
			free(Image_getData(img));
		}
		free(img);
	}
}

void Image_setPixel(Image_t* img, int x, int y, int c, float val) {
	float *data = Image_getData(img);
	int channels = Image_getChannels(img);
	int pitch = Image_getPitch(img);

	data[y * pitch + x * channels + c] = val;

	return;
}

float Image_getPixel(Image_t* img, int x, int y, int c) {
	float *data = Image_getData(img);
	int channels = Image_getChannels(img);
	int pitch = Image_getPitch(img);

	return data[y * pitch + x * channels + c];
}

bool Image_is_same(Image_t* a, Image_t* b) {
	if (a == NULL || b == NULL) {
		std::cerr << "Comparing null images." << std::endl;
		return false;
	} else if (a == b) {
		return true;
	} else if (Image_getWidth(a) != Image_getWidth(b)) {
		std::cerr << "Image widths do not match." << std::endl;
		return false;
	} else if (Image_getHeight(a) != Image_getHeight(b)) {
		std::cerr << "Image heights do not match." << std::endl;
		return false;
	} else if (Image_getChannels(a) != Image_getChannels(b)) {
		std::cerr << "Image channels do not match." << std::endl;
		return false;
	} else {
		float *aData, *bData;
		int width, height, channels;
		int ii, jj, kk;

		aData = Image_getData(a);
		bData = Image_getData(b);

		assert(aData != NULL);
		assert(bData != NULL);

		width = Image_getWidth(a);
		height = Image_getHeight(a);
		channels = Image_getChannels(a);

		for (ii = 0; ii < height; ii++) {
			for (jj = 0; jj < width; jj++) {
				for (kk = 0; kk < channels; kk++) {
					float x, y;
					if (channels <= 3) {
						x = clamp(*aData++, 0, 1);
						y = clamp(*bData++, 0, 1);
					} else {
						x = *aData++;
						y = *bData++;
					}
					if (almostUnequalFloat(x, y)) {
						std::cerr
								<< "Image pixels do not match at position ( row = "
								<< ii << ", col = " << jj << ", channel = "
								<< kk << ") expecting a value of " << y
								<< " but got a value of " << x << std::endl;

						return false;
					}
				}
			}
		}
		return true;
	}
}