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@ -3,7 +3,7 @@
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#include <inttypes.h>
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typedef unsigned char uch;
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// ™n°¸½Y˜‹
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// 檔案結構
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#pragma pack(2)
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struct BmpFileHeader {
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uint16_t bfTybe;
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@ -35,7 +35,7 @@ void bmpWrite(const char* name, const uch* raw_img,
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perror("Error bmpWrite.");
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return;
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}
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// ™n°¸ÙYÓ<EFBFBD>
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// 檔案資訊
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struct BmpFileHeader file_h = {
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.bfTybe=0x4d42,
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.bfReserved1=0,
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@ -44,7 +44,7 @@ void bmpWrite(const char* name, const uch* raw_img,
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};
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file_h.bfSize = file_h.bfOffBits + width*height * bits/8;
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if(bits==8) {file_h.bfSize+= 1024, file_h.bfOffBits+= 1024;}
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// ˆDƬÙYÓ<EFBFBD>
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// 圖片資訊
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struct BmpInfoHeader info_h = {
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.biSize=40,
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.biPlanes=1,
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@ -59,7 +59,7 @@ void bmpWrite(const char* name, const uch* raw_img,
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info_h.biBitCount = bits;
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info_h.biSizeImage = width*height * bits/8;
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if(bits == 8) {info_h.biClrUsed=256;}
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// Œ‘Èë™nî^
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// 寫入檔頭
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FILE *pFile = NULL;
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// pFile = fopen(name,"wb+");
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fopen_s(&pFile, name,"wb+");
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@ -69,7 +69,7 @@ void bmpWrite(const char* name, const uch* raw_img,
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}
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fwrite((char*)&file_h, sizeof(char), sizeof(file_h), pFile);
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fwrite((char*)&info_h, sizeof(char), sizeof(info_h), pFile);
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// Œ‘Õ{É«±P
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// 寫調色盤
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if(bits == 8) {
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for(unsigned i = 0; i < 256; ++i) {
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uch c = i;
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@ -79,20 +79,20 @@ void bmpWrite(const char* name, const uch* raw_img,
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fwrite("", sizeof(char), sizeof(uch), pFile);
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}
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}
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// Œ‘ÈëˆDƬÙYÓ<EFBFBD>
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// 寫入圖片資訊
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size_t alig = ((width*bits/8)*3) % 4;
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for(int j = height-1; j >= 0; --j) {
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for(unsigned i = 0; i < width; ++i) {
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uint32_t idx = j*width +i;
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if(bits == 24) { // RGBˆDƬ
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if(bits == 24) { // RGB圖片
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fwrite((char*)&raw_img[idx*3 +2], sizeof(char), sizeof(uch), pFile);
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fwrite((char*)&raw_img[idx*3 +1], sizeof(char), sizeof(uch), pFile);
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fwrite((char*)&raw_img[idx*3 +0], sizeof(char), sizeof(uch), pFile);
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} else if(bits == 8) { // »ÒëAˆD
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} else if(bits == 8) { // 灰階圖
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fwrite((char*)&raw_img[idx], sizeof(char), sizeof(uch), pFile);
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}
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}
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// Œ¦ýR4byte
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// 對齊4byte
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for(size_t i = 0; i < alig; ++i) {
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fwrite("", sizeof(char), sizeof(uch), pFile);
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}
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@ -106,11 +106,11 @@ void bmpRead(const char* name, uch** raw_img,
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perror("Error bmpRead.");
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return;
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}
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// ™n°¸ÙYÓ<EFBFBD>
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// 檔案資訊
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struct BmpFileHeader file_h;
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// ˆDƬÙYÓ<EFBFBD>
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// 圖片資訊
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struct BmpInfoHeader info_h;
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// ×xÈ¡™nî^
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// 讀取檔頭
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FILE *pFile = NULL;
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// pFile = fopen(name, "rb+");
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fopen_s(&pFile, name, "rb+");
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@ -120,23 +120,23 @@ void bmpRead(const char* name, uch** raw_img,
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}
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fread((char*)&file_h, sizeof(char), sizeof(file_h), pFile);
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fread((char*)&info_h, sizeof(char), sizeof(info_h), pFile);
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// ×xÈ¡éLŒ’
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// 讀取長寬
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*width = info_h.biWidth;
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*height = info_h.biHeight;
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*bits = info_h.biBitCount;
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size_t ImgSize = ((size_t)*width) * ((size_t)*height) * 3;
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*raw_img = (uch*)calloc(ImgSize, sizeof(uch));
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// ×xÈ¡×xƬÙYÓ<EFBFBD>ÞDRAW™nÙYÓ<EFBFBD>
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// 讀取讀片資訊轉RAW檔資訊
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fseek(pFile, file_h.bfOffBits, SEEK_SET);
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size_t alig = ((info_h.biWidth*info_h.biBitCount/8)*3) % 4;
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for(int j = *height-1; j >= 0; --j) {
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for(unsigned i = 0; i < *width; ++i) {
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uint32_t idx = j*(*width)+i;
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if(*bits == 24) { // RGBˆDƬ
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if(*bits == 24) { // RGB圖片
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fread((char*)&(*raw_img)[idx*3 +2], sizeof(char), sizeof(uch), pFile);
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fread((char*)&(*raw_img)[idx*3 +1], sizeof(char), sizeof(uch), pFile);
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fread((char*)&(*raw_img)[idx*3 +0], sizeof(char), sizeof(uch), pFile);
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} else if(*bits == 8) { // »ÒëAˆD
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} else if(*bits == 8) { // 灰階圖
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fread((char*)&(*raw_img)[idx], sizeof(char), sizeof(uch), pFile);
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}
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}
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@ -145,7 +145,7 @@ void bmpRead(const char* name, uch** raw_img,
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fclose(pFile);
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}
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// ˆDÏñ½Y˜‹
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// 圖像結構
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typedef struct Imgraw {
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uint32_t width, height;
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uint16_t bits;
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@ -161,11 +161,11 @@ void Imgraw_Writ(const Imgraw* _this, const char* name) {
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}
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/*==============================================================*/
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int main(int argc, char const *argv[]) {
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// ½¨˜‹
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// 建構
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Imgraw img = {0, 0, 0, NULL};
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// ×xˆD
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// 讀圖
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Imgraw_Read(&img, "./input/bw2x1.bmp");
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// Œ‘ˆD
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// 寫圖
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Imgraw_Writ(&img, "./output/bw2x1(output).bmp");
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return 0;
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}
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