SS 2025

2023_CS50X/bmp.h

@@ -0,0 +1,57 @@
+// BMP-related data types based on Microsoft's own
+
+#include <stdint.h>
+
+// These data types are essentially aliases for C/C++ primitive data types.
+// Adapted from http://msdn.microsoft.com/en-us/library/cc230309.aspx.
+// See https://en.wikipedia.org/wiki/C_data_types#stdint.h for more on stdint.h.
+
+typedef uint8_t  BYTE;
+typedef uint32_t DWORD;
+typedef int32_t  LONG;
+typedef uint16_t WORD;
+
+// The BITMAPFILEHEADER structure contains information about the type, size,
+// and layout of a file that contains a DIB [device-independent bitmap].
+// Adapted from http://msdn.microsoft.com/en-us/library/dd183374(VS.85).aspx.
+
+typedef struct
+{
+    WORD   bfType;
+    DWORD  bfSize;
+    WORD   bfReserved1;
+    WORD   bfReserved2;
+    DWORD  bfOffBits;
+} __attribute__((__packed__))
+BITMAPFILEHEADER;
+
+// The BITMAPINFOHEADER structure contains information about the
+// dimensions and color format of a DIB [device-independent bitmap].
+// Adapted from http://msdn.microsoft.com/en-us/library/dd183376(VS.85).aspx.
+
+typedef struct
+{
+    DWORD  biSize;
+    LONG   biWidth;
+    LONG   biHeight;
+    WORD   biPlanes;
+    WORD   biBitCount;
+    DWORD  biCompression;
+    DWORD  biSizeImage;
+    LONG   biXPelsPerMeter;
+    LONG   biYPelsPerMeter;
+    DWORD  biClrUsed;
+    DWORD  biClrImportant;
+} __attribute__((__packed__))
+BITMAPINFOHEADER;
+
+// The RGBTRIPLE structure describes a color consisting of relative intensities of
+// red, green, and blue. Adapted from http://msdn.microsoft.com/en-us/library/aa922590.aspx.
+
+typedef struct
+{
+    BYTE  rgbtBlue;
+    BYTE  rgbtGreen;
+    BYTE  rgbtRed;
+} __attribute__((__packed__))
+RGBTRIPLE;