diff options
Diffstat (limited to 'converter/bmp.h')
| -rw-r--r-- | converter/bmp.h | 56 |
1 files changed, 40 insertions, 16 deletions
diff --git a/converter/bmp.h b/converter/bmp.h index 8b2aa302..524bbf7e 100644 --- a/converter/bmp.h +++ b/converter/bmp.h @@ -88,12 +88,30 @@ enum bmpClass {C_WIN=1, C_OS2=2}; static char const er_internal[] = "%s: internal error!"; /* Values of the "compression" field of the BMP info header */ -#define COMP_RGB 0 -#define COMP_RLE8 1 -#define COMP_RLE4 2 -#define COMP_BITFIELDS 3 -#define COMP_JPEG 4 -#define COMP_PNG 5 +typedef enum BMPCompType { + BMPCOMP_RGB = 0, + BMPCOMP_RLE8 = 1, + BMPCOMP_RLE4 = 2, + BMPCOMP_BITFIELDS = 3, + BMPCOMP_JPEG = 4, + BMPCOMP_PNG = 5 +} BMPCompType; + +static __inline__ const char * +BMPCompTypeName(BMPCompType const compression) { + + switch (compression) { + case BMPCOMP_RGB: return "none (RBG)"; + case BMPCOMP_RLE4: return "4 bit run-length coding"; + case BMPCOMP_RLE8: return "8 bit run-length coding"; + case BMPCOMP_BITFIELDS: return "none (bitfields)"; + case BMPCOMP_JPEG: return "JPEG"; + case BMPCOMP_PNG: return "PNG"; + } + return 0; /* Default compiler warning */ +} + + static __inline__ unsigned int BMPlenfileheader(enum bmpClass const class) { @@ -127,7 +145,13 @@ static __inline__ unsigned int BMPlencolormap(enum bmpClass const class, unsigned int const bitcount, unsigned int const cmapsize) { +/*---------------------------------------------------------------------------- + The number of bytes of the BMP stream occupied by the colormap in a + BMP of class 'class' with 'bitcount' bits per pixel and 'cmapsize' + entries in the palette. + 'cmapsize' == 0 means there is no palette. +-----------------------------------------------------------------------------*/ unsigned int lenrgb; unsigned int lencolormap; @@ -214,21 +238,21 @@ BMPoffbits(enum bmpClass const class, static __inline__ unsigned int -BMPlenfileGen(enum bmpClass const class, - unsigned int const bitcount, - unsigned int const cmapsize, - unsigned int const x, - unsigned int const y, - unsigned int const imageSize, - unsigned long int const compression) { +BMPlenfileGen(enum bmpClass const class, + unsigned int const bitcount, + unsigned int const cmapsize, + unsigned int const x, + unsigned int const y, + unsigned int const imageSize, + BMPCompType const compression) { /*---------------------------------------------------------------------------- Return the size of the BMP file in bytes. -----------------------------------------------------------------------------*/ unsigned int retval; switch (compression) { - case COMP_RGB: - case COMP_BITFIELDS: + case BMPCOMP_RGB: + case BMPCOMP_BITFIELDS: retval = BMPoffbits(class, bitcount, cmapsize) + BMPlenbits(class, bitcount, x, y); @@ -250,7 +274,7 @@ BMPlenfile(enum bmpClass const class, /*---------------------------------------------------------------------------- return the size of the BMP file in bytes; no compression -----------------------------------------------------------------------------*/ - return BMPlenfileGen(class, bitcount, cmapsize, x, y, 0, COMP_RGB); + return BMPlenfileGen(class, bitcount, cmapsize, x, y, 0, BMPCOMP_RGB); } #endif |