henyxia / bmp2rgb565

Commit a859bfec4823af8b7b558a76470c443972f31ccb

Authored by henyxia
1 parent b91288ec

Finaly working properly

Showing 1 changed file with 79 additions and 0 deletions   Show diff stats
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... ... @@ -11,6 +11,8 @@ int main(int argc, char *argv[])
11 11  
12 12 FILE* src = NULL;
13 13 FILE* dst = NULL;
  14 + unsigned char buffer[5];
  15 + int initOffsetBMP;
14 16  
15 17 src = fopen(argv[1], "r");
16 18 dst = fopen(argv[2], "w");
... ... @@ -27,5 +29,82 @@ int main(int argc, char *argv[])
27 29 return 3;
28 30 }
29 31  
  32 + printf("Reading BMP\n");
  33 +
  34 + fseek(src, 0x0A, SEEK_SET);
  35 + buffer[0] = getc(src);
  36 + buffer[1] = getc(src);
  37 + buffer[2] = getc(src);
  38 + buffer[3] = getc(src);
  39 + printf("Pixel array offset %02x %02x %02x %02x\n", buffer[3], buffer[2], buffer[1], buffer[0]);
  40 + initOffsetBMP = buffer[0] + (buffer[1] >> 8) + (buffer[2] >> 16) + (buffer[3] >> 24);
  41 +
  42 + fseek(src, 0x12, SEEK_SET);
  43 + buffer[0] = getc(src);
  44 + buffer[1] = getc(src);
  45 + buffer[2] = getc(src);
  46 + buffer[3] = getc(src);
  47 + printf("Width %02x %02x %02x %02x\n", buffer[3], buffer[2], buffer[1], buffer[0]);
  48 +
  49 + //fseek(src, 0x12, SEEK_SET);
  50 + buffer[0] = getc(src);
  51 + buffer[1] = getc(src);
  52 + buffer[2] = getc(src);
  53 + buffer[3] = getc(src);
  54 + printf("Height %02x %02x %02x %02x\n", buffer[3], buffer[2], buffer[1], buffer[0]);
  55 +
  56 + fseek(src, 0x1C, SEEK_SET);
  57 + buffer[0] = getc(src);
  58 + buffer[1] = getc(src);
  59 + printf("Bits Per Pixel %02x %02x\n", buffer[0], buffer[1]);
  60 +
  61 + if(buffer[1] != 0 || buffer[0] != 0x18)
  62 + {
  63 + printf("Could not read BMP\n");
  64 + return 1;
  65 + }
  66 +
  67 + fseek(src, initOffsetBMP, SEEK_SET);
  68 +
  69 + printf("Now reading BMP pixels and printing them to the RBG565 file\n");
  70 + while(1)
  71 + {
  72 + buffer[0] = getc(src);
  73 + buffer[1] = getc(src);
  74 + buffer[2] = getc(src);
  75 + if(feof(src))
  76 + break;
  77 + printf("Pixel BMP 24 bits R %02X G %02X B %02X ", buffer[2], buffer[1], buffer[0]);
  78 + buffer[2] = buffer[2] >> 3; //R
  79 + buffer[1] = buffer[1] >> 2; //G
  80 + buffer[0] = buffer[0] >> 3; //B
  81 + printf("-> RGB 565 R %02X G %02X B %02X ", buffer[2], buffer[1], buffer[0]);
  82 + buffer[3] = ((buffer[0] & 0x1F) << 3) + ((buffer[1] & 0x38) >> 3);
  83 + buffer[4] = ((buffer[1] & 0x07) << 5) + (buffer[2] & 0x1F);
  84 + printf("-> RGB 565 M %02X%02X\n", buffer[3], buffer[4]);
  85 + fprintf(dst, "%c%c", buffer[4], buffer[3]);
  86 + }
  87 +
  88 + printf("Done !\n");
  89 +
  90 + fclose(src);
  91 + fclose(dst);
  92 +
30 93 return 0;
31 94 }
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