79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
#include <X11/Xlib.h>
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#include <string>
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#define STB_IMAGE_IMPLEMENTATION
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#include "../dep/stb_image.hh"
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#include <stdexcept>
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#include "image.hh"
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namespace uw {
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Image::Image(Screen &screen, const std::string imgPath) : uwScreen{ screen } {
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if (imgPath.empty()) throw std::runtime_error("画像パスが空です。");
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data = stbi_load(imgPath.c_str(), &width, &height, &chan, 4);
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if (!data) throw std::runtime_error("画像の読み込みに失敗： " + imgPath);
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imageExtent.width = width;
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imageExtent.height = height;
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imagePath = imgPath;
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v = DefaultVisual(screen.getDisplay(), screen.getScreen());
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createDepth();
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createPixmap();
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createImage();
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createGC();
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}
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Image::~Image() {
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if (gc) XFreeGC(uwScreen.getDisplay(), gc);
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if (pm) XFreePixmap(uwScreen.getDisplay(), pm);
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if (image) XFree(image);
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if (data) stbi_image_free(data);
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}
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void Image::createDepth() {
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depth = DefaultDepth(uwScreen.getDisplay(), uwScreen.getScreen());
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if (depth != 24 && depth != 32) {
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throw std::runtime_error(
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"「" + std::to_string(depth) + "」の様な視覚の深さは未対応です。");
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}
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imageExtent.depth = depth;
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}
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void Image::createPixmap() {
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pm = XCreatePixmap(uwScreen.getDisplay(), uwScreen.getWindow(), width, height,
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depth);
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}
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void Image::createImage() {
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if (depth == 24) {
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std::vector<uchar> cd(data, data + (width * height * 4));
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cdata = cd;
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for (int i = 0; i < width * height; i++) {
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cdata[i * 4 + 0] = data[i * 4 + 2];
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cdata[i * 4 + 1] = data[i * 4 + 1];
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cdata[i * 4 + 2] = data[i * 4 + 0];
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cdata[i * 4 + 3] = data[i * 4 + 3];
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}
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image = XCreateImage(uwScreen.getDisplay(), v, depth, ZPixmap, 0,
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(char *)cdata.data(), width, height, 32, 0);
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} else {
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image = XCreateImage(uwScreen.getDisplay(), v, depth, ZPixmap, 0,
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(char *)data, width, height, 32, 0);
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}
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if (!image) throw std::runtime_error("XImageの作成に失敗。");
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}
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void Image::createGC() {
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gc = XCreateGC(uwScreen.getDisplay(), pm, 0, nullptr);
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if (!gc) throw std::runtime_error("GCの作成に失敗。");
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}
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}
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