Ex11. 비트맵 이미지 Frame Buffer에 뿌리기

// Convert Bmp Color info static unsigned int GUI_ConvertBmp24bit(GUI_FB *fb, unsigned char r, unsigned char g, unsigned char b) { unsigned int rgb888 = ((r << 16) & 0xFF0000) | ((g << 8) & 0x00FF00) | ((b << 0) & 0x0000FF); unsigned int color; if ( fb->bits_per_pixel == 32 ) { unsigned char alpha = 0xff; color = rgb888 | (alpha << 24); } else { unsigned int color_r = (rgb888 & 0xFF0000) >> 16; unsigned int color_g = (rgb888 & 0x00FF00) >> 8; unsigned int color_b = (rgb888 & 0x0000FF) >> 0; color = (color_r << fb->red_offset ) | (color_g << fb->green_offset) | (color_b << fb->blue_offset); } return color; } ////////////////////////////////////////////////////////////////////////////////////////////////// // Bitmap ////////////////////////////////////////////////////////////////////////////////////////////////// static int GUI_CreateBmp_Obj(GUI_OBJ *obj, int fbx, int fby, const char *bmpPath) { GUI_BMP_HEADER *bmp; unsigned char *bmpImg; int bmpfd; unsigned char bmpVal[3]; // RGB 값을 저장하기 위한 배열 unsigned int pixel; // bitmap rgb를 convert한 color값 unsigned int RowSize; // bitmap RowSize (4bytes alignment) unsigned int PaddingBytes; // padding bytes for RowSize int x, y, idx; bmp = (GUI_BMP_HEADER *)malloc(sizeof(GUI_BMP_HEADER)); bmpfd = open(bmpPath, O_RDWR); if ( bmpfd > 0 ) { read(bmpfd, bmp, sizeof(GUI_BMP_HEADER)); #if 0 printf(" bfType[%x]\n bfSize[%d]\n bfReserved1[%d]\n bfReserved2[%d]\n bfOffBits[%d]\n biSize[%d]\n biWidth[%d]\n biHeight[%d]\n biPlanes[%d]\n biBitCount[%d]\n biCompression[%d]\n biSizeImage[%d]\n biXpelsPerMeter[%d]\n biYpelsPerMeter[%d]\n biClrUsed[%d]\n biClrIMportant[%d]\n" ,bmp->bfType ,bmp->bfSize ,bmp->bfReserved1 ,bmp->bfReserved2 ,bmp->bfOffBits ,bmp->biSize ,bmp->biWidth ,bmp->biHeight ,bmp->biPlanes ,bmp->biBitCount ,bmp->biCompression ,bmp->biSizeImage ,bmp->biXpelsPerMeter ,bmp->biYpelsPerMeter ,bmp->biClrUsed ,bmp->biClrIMportant); #endif // 24비트 비트맵이 아니면 프로그램 종료 if (bmp->biBitCount != 24) { if ( bmp != NULL ) { free(bmp); bmp = NULL; } printf("[%d bit]bitmap is not supported\n", bmp->biBitCount); return 0; } bmpImg = (unsigned char *)malloc(sizeof(unsigned char) * bmp->biSizeImage); read(bmpfd, bmpImg, bmp->biSizeImage); RowSize = (bmp->biSizeImage) / (bmp->biHeight); PaddingBytes = RowSize - (bmp->biWidth * (bmp->biBitCount/8)); // bmp -> frame buffer for ( y = 0; y < bmp->biHeight; y++ ) { for ( x = 0; x < bmp->biWidth; x++ ) { // (x, y) -> bmpImg[idx] // idx = (bmp->biSizeImage) - (x + (y*bmp->biWidth) + 1)*3 + PaddingBytes; //idx = bmp->biSizeImage - 3 - (y)*(bmp->biWidth*3) - (x*3); // -> 이미지 좌우 반전 idx = bmp->biSizeImage - (y+1)*(bmp->biWidth*3 + PaddingBytes) + (x*3); //printf("(%d)",idx); // bmp 이미지 데이터는 맨 뒤가 (0,0) rgb 3bytes memcpy( bmpVal, &bmpImg[idx], 3 ); // 24bit rgb -> frame buffer color pixel = GUI_ConvertBmp24bit(bmpVal[2], bmpVal[1], bmpVal[0]); // Draw Frame buff GUI_DrawDot(obj, fbx+x, fby+y, pixel); } } close(bmpfd); if ( bmpImg != NULL ) { free(bmpImg); bmpImg = NULL; } } else { printf("[%s]bitmap open failed\n", bmpPath); } if ( bmp != NULL ) { free(bmp); bmp = NULL; } return 1; }