將rgba圖片信息轉換為bmp圖片文件

#include <stdio.h> #include <windows.h>#pragma pack(1) //BMP文件頭（14字節） typedef struct /**** BMP file header structure ****/ {unsigned int bfSize; /* Size of file */unsigned short bfReserved1; /* Reserved */unsigned short bfReserved2; /* ... */unsigned int bfOffBits; /* Offset to bitmap data */ } MyBITMAPFILEHEADER;//位圖信息頭（40字節） typedef struct /**** BMP file info structure ****/ {unsigned int biSize; /* Size of info header */int biWidth; /* Width of image */int biHeight; /* Height of image */unsigned short biPlanes; /* Number of color planes */unsigned short biBitCount; /* Number of bits per pixel */unsigned int biCompression; /* Type of compression to use */unsigned int biSizeImage; /* Size of image data */int biXPelsPerMeter; /* X pixels per meter */int biYPelsPerMeter; /* Y pixels per meter */unsigned int biClrUsed; /* Number of colors used */unsigned int biClrImportant; /* Number of important colors */ } MyBITMAPINFOHEADER;void MySaveBmp(const char *filename, unsigned char *rgbbuf, int width, int height) {MyBITMAPFILEHEADER bfh;MyBITMAPINFOHEADER bih;/* Magic number for file. It does not fit in the header structure due to alignment requirements, so put it outside */unsigned short bfType = 0x4d42;bfh.bfReserved1 = 0;bfh.bfReserved2 = 0;bfh.bfSize = sizeof(MyBITMAPFILEHEADER) + sizeof(MyBITMAPINFOHEADER) + width * height * 3;bfh.bfOffBits = 0x36;bih.biSize = sizeof(MyBITMAPINFOHEADER);bih.biWidth = width;bih.biHeight = -height;bih.biPlanes = 1;bih.biBitCount = 24;bih.biCompression = 0;bih.biSizeImage = 0;bih.biXPelsPerMeter = 5000;bih.biYPelsPerMeter = 5000;bih.biClrUsed = 0;bih.biClrImportant = 0;FILE *file = fopen(filename, "wb");if (!file){printf("Could not write file\n");return;}/*Write headers*/fwrite(&bfType, sizeof(bfType), 1, file);fwrite(&bfh, sizeof(bfh), 1, file);fwrite(&bih, sizeof(bih), 1, file);fwrite(rgbbuf, width*height * 3, 1, file);fclose(file); }void RGBAtoRGB(char *buf, long lenght) {char *prgba = buf;char *prgb = buf;for (long i = 0; i < lenght; i++, prgba++){if ((i + 1) % 4 == 0 && i != 0)continue;*prgb++ = *prgba;} }void rgbaTobmp(const char *filename, unsigned char *rgbbuf, int width, int height) {// 因為傳入的是rgba,所以*4RGBAtoRGB((char*)rgbbuf, height*width * 4);MySaveBmp(filename, rgbbuf, width, height); }void main(int argc, char *argv[]) {int conf = 0;int devicenum = 0;// image.data存儲的是圖片的rgba信息FILE * file = fopen("image.data", "rb");fwrite(image_data, 1, k4a_image_get_size(color_image), file);fclose(file);char temp[100] = { 0 };sprintf(temp, "%d.bmp", count);rgbaTobmp(temp, (unsigned char*)image_data, width, height);}

總結

以上是生活随笔為你收集整理的将rgba图片信息转换为bmp图片文件的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。