#include #include #include #include #include // 各种位图数据结构 class Converter { public: Converter() : pixels_(NULL), width_(0), height_(0) {} ~Converter() { Clear(); } // w, h 指输出时字符画的宽高 bool ConvImage(char const *image, char const *html, int w, int h) { // 1. 读取位图文件中的像素颜色信息 if (!OpenBitmap(image)) return false; // 2. 根据图片的像素颜色，转换字符，输出字符画 FILE *file = fopen(html, "w"); if (file) { WriteHead(file); WriteAscii(file, w, h); WriteFoot(file); fclose(file); } return (file != NULL); } bool ConvAnimation(char const *pattern, int sid, int eid, char const *html, int w, int h) { FILE *file = fopen(html, "w"); if (file) { WriteHead(file); WriteScript(file); char filename[MAX_PATH]; for (int i = sid; i != eid; i++) { snprintf(filename, sizeof(filename), pattern, i); if (OpenBitmap(filename)) WriteAscii(file, w, h); } WriteFoot(file); fclose(file); } return (file != NULL); } void Clear() { if (pixels_) delete[] pixels_; pixels_ = NULL; width_ = 0; height_ = 0; } private: bool OpenBitmap(char const *filename) { FILE *file = fopen(filename, "rb"); if (file) { Clear(); BITMAPFILEHEADER bf; BITMAPINFOHEADER bi; // 这里假设读取的都是24位未压缩的位图，演示用，不作任何出错处理:P fread(&bf, sizeof(bf), 1, file); fread(&bi, sizeof(bi), 1, file); // 好吧，还是稍微假设一下 assert(bi.biBitCount == 24); assert(bi.biCompression == BI_RGB); // 下面开始正式读取～ width_ = bi.biWidth; height_ = bi.biHeight; pixels_ = new RGBQUAD[width_ * height_]; // 位图像素数据需要DWORD对齐，所以一行颜色的大小应该是这么算的 uint32_t rowSize = (bi.biBitCount * width_ + 31) / 32 * 4; uint8_t *line = new uint8_t[rowSize]; for (int y = 0; y < height_; y++) { fread(line, rowSize, 1, file); for (int x = 0; x < width_; x++) { uint8_t *color = line + x * 3; // 24Bit RGBQUAD *pixel = &pixels_[(height_ - y - 1) * width_ + x]; pixel->rgbBlue = color[0]; pixel->rgbGreen = color[1]; pixel->rgbRed = color[2]; } } delete[] line; fclose(file); } return (file != NULL); } void WriteHead(FILE *file) const { fprintf(file, "%s\n", "\ \ \ \ \ "); } void WriteFoot(FILE *file) const { fprintf(file, "%s\n", "\ \ "); } void WriteScript(FILE *file) const { fprintf(file, "%s\n", "\ "); } // 将图片转化为字符画，输出到一个 pre 标签中 void WriteAscii(FILE *file, int w, int h) const { // 如果字符画大小不大于图片大小，会把 stepX stepY 个像素合并为一个字符 // 这里又假设 w h 不会比 width_ height_ 大 // Up主是个懒人，你懂的 int stepX = width_ / w; int stepY = height_ / h; fprintf(file, "%s", "

");
        for (int y = 0; y < height_; y += stepY) {
            for (int x = 0; x < width_; x += stepX) {
                RGBQUAD color = GetColor(x, y, stepX, stepY);
                fprintf(file, "%c", ColorToCharacter(color));
            }
            fprintf(file, "\n");
        }
        fprintf(file, "%s", "

"); } // 将 (x,y) 为左上角的 w*h 区域混合为一个颜色 RGBQUAD GetColor(int x, int y, int w, int h) const { int r = 0, g = 0, b = 0; for (int i = 0; i < w; i++) { if (i + x >= width_) continue; for (int j = 0; j < h; j++) { if (j + y >= height_) continue; RGBQUAD const& color = pixels_[(y + j) * width_ + (x + i)]; r += color.rgbRed; g += color.rgbGreen; b += color.rgbBlue; } } RGBQUAD result = {}; result.rgbRed = r / (w * h); result.rgbGreen = g / (w * h); result.rgbBlue = b / (w * h); return result; } char ColorToCharacter(RGBQUAD const& color) const { int brightness = (color.rgbRed + color.rgbGreen + color.rgbBlue) / 3; // 这是输出字符画用的字符 // 越靠前的字符对应越深的颜色（所以最后一个是空格，最亮，纯白） static char const *characters = "M80V1;:*-. "; int count = strlen(characters); int span = 0xFF / count; // 亮度值 [0,255] int cidx = brightness / span; if (cidx == count) cidx--; return characters[cidx]; } Converter(Converter const&); Converter& operator=(Converter const&); int32_t width_; // 图片宽度 int32_t height_; // 图片高度 RGBQUAD *pixels_; // 像素颜色数组 }; int main() { Converter conv; conv.ConvImage("mario.bmp", "mario.htm", 250/2, 388/2); //conv.ConvAnimation("BA/BA_%04d.bmp", 1, 1755, "BadApple.htm", 512/6, 384/6); }