101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
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#include <Image.hpp>
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Image::Image(int width_, int height_, int depth_) : width(width_), height(height_), depth(depth_) {
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data = new unsigned char[width * height * depth];
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}
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Image::~Image() {
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delete[] data;
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}
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Image::Image(std::string const& filename) {
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// Load image data using stb_image.h
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unsigned char* image_data = stbi_load(filename.c_str(), &width, &height, &depth, 0);
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// Allocate memory using new[] and copy the data from image.data. This avoids allocating memory with malloc and freeing it with delete.
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if (image_data != nullptr) {
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data = new unsigned char[width * height * depth];
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std::memcpy(data, image_data, width * height * depth);
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stbi_image_free(image_data);
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} else { // If the image loading process has failed
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width = 1;
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height = 1;
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depth = 1;
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data = new unsigned char[width * height * depth];
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data[0] = 0;
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}
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}
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int Image::Save(std::string const& filename) const {
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if(filename.size() > 4 && filename.substr(filename.size() - 4) == ".png")
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return stbi_write_png(filename.c_str(), width, height, depth, (const void *)data, 0);
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if(filename.size() > 4 && filename.substr(filename.size() - 4) == ".jpg")
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return stbi_write_jpg(filename.c_str(), width, height, depth, (const void *)data, 100);
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if(filename.size() > 4 && filename.substr(filename.size() - 4) == ".bmp")
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return stbi_write_bmp(filename.c_str(), width, height, depth, (const void *)data);
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if(filename.size() > 4 && filename.substr(filename.size() - 4) == ".tga")
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return stbi_write_tga(filename.c_str(), width, height, depth, (const void *)data);
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return -1;// If the file extension is not supported
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}
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int Image::GetWidth() const {
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return width;
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}
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int Image::GetHeight() const {
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return height;
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}
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int Image::GetDepth() const {
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return depth;
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}
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Image & Image::Fill(unsigned char value) {
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std::memset(data, value, width * height * depth);
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return *this;
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}
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Image & Image::Fill(Eigen::Vector3i const& rgb) {
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for(int i = 0 ; i < height ; i++)
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for(int j = 0 ; j < width ; j++)
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SetPixel(i, j, rgb);
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return *this;
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}
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unsigned char Image::GetPixelValue(int i, int j, int c) const {
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return data[i*width*depth + j*depth + c];
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}
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void Image::SetPixelValue(int i, int j, int c, unsigned char value) {
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data[i*width*depth + j*depth + c] = value;
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}
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unsigned char & Image::PixelValue(int i, int j, int c) {
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return data[i*width*depth + j*depth + c];
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}
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Eigen::Vector3i Image::GetPixel(int i, int j) const {
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int index = i*width*depth + j*depth;
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return Eigen::Vector3i((int)data[index], (int)data[index + 1], (int)data[index + 2]);
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}
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Eigen::Vector3i Image::GetPixel(Eigen::Vector2i const& pos) const {
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return GetPixel(pos[0], pos[1]);
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}
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Image & Image::SetPixel(int i, int j, Eigen::Vector3i const& rgb) {
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SetPixelValue(i, j, 0, (unsigned char)rgb[0]);
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SetPixelValue(i, j, 1, (unsigned char)rgb[1]);
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SetPixelValue(i, j, 2, (unsigned char)rgb[2]);
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return *this;
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}
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Image & Image::SetPixel(Eigen::Vector2i const& pos, Eigen::Vector3i const& rgb) {
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SetPixel(pos[0], pos[1], rgb);
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return *this;
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}
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unsigned char Image::operator[](int i) const {
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return data[i];
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}
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