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Leptonica 1.85.0
Image processing and image analysis suite
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Leptonica 1.85.0
Image processing and image analysis suite
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Go to the source code of this file.
Macros | |
| #define | DEBUG 0 |
Functions | |
| PIX * | pixReadStreamBmp (FILE *fp) |
| PIX * | pixReadMemBmp (const l_uint8 *cdata, size_t size) |
| l_ok | pixWriteStreamBmp (FILE *fp, PIX *pix) |
| l_ok | pixWriteMemBmp (l_uint8 **pfdata, size_t *pfsize, PIX *pixs) |
Variables | |
| RGBA_QUAD | bwmap [2] = { {255,255,255,255}, {0,0,0,255} } |
| static const l_int32 | L_MAX_ALLOWED_WIDTH = 1000000 |
| static const l_int32 | L_MAX_ALLOWED_HEIGHT = 1000000 |
| static const l_int64 | L_MAX_ALLOWED_PIXELS = 400000000LL |
| static const l_int32 | L_MAX_ALLOWED_RES = 10000000 |
Read bmp
PIX *pixReadStreamBmp()
PIX *pixReadMemBmp()
Write bmp
l_int32 pixWriteStreamBmp()
l_int32 pixWriteMemBmp()
Definition in file bmpio.c.
| PIX * pixReadMemBmp | ( | const l_uint8 * | cdata, |
| size_t | size ) |
| [in] | cdata | bmp data |
| [in] | size | number of bytes of bmp-formatted data |
Notes:
(1) The BMP file is organized as follows:
* 14 byte fileheader
* Variable size infoheader: 40, 108 or 124 bytes.
We only use data in he first 40 bytes.
* Optional colormap, with size 4 * ncolors (in bytes)
* Image data
(2) 2 bpp bmp files are not valid in the original spec, but they
are valid in later versions.
(3) We support reading rgb files with bpp = 24 and rgba files
with 32 bpp. For the latter, the transparency component of
the generated pix is saved; however, for rgba images with
non-opaque transparent components, png provides more flexibility.
Definition at line 132 of file bmpio.c.
References PixColormap::array, BMP_FileHeader::bfOffBits, BMP_FileHeader::bfType, BMP_InfoHeader::biBitCount, BMP_InfoHeader::biCompression, BMP_InfoHeader::biHeight, BMP_InfoHeader::biSizeImage, BMP_InfoHeader::biWidth, BMP_InfoHeader::biXPelsPerMeter, BMP_InfoHeader::biYPelsPerMeter, BMP_FHBYTES, BMP_ID, BMP_IHBYTES, COLOR_BLUE, COLOR_GREEN, COLOR_RED, L_ALPHA_CHANNEL, PixColormap::n, and REMOVE_CMAP_BASED_ON_SRC.
Referenced by pixReadStreamBmp().
| PIX * pixReadStreamBmp | ( | FILE * | fp | ) |
| [in] | fp | file stream opened for read |
Notes:
(1) Here are references on the bmp file format:
http://en.wikipedia.org/wiki/BMP_file_format
http://www.fortunecity.com/skyscraper/windows/364/bmpffrmt.html
Definition at line 88 of file bmpio.c.
References pixReadMemBmp().
| l_ok pixWriteMemBmp | ( | l_uint8 ** | pfdata, |
| size_t * | pfsize, | ||
| PIX * | pixs ) |
| [out] | pfdata | data of bmp formatted image |
| [out] | pfsize | size of returned data |
| [in] | pixs | 1, 2, 4, 8, 16, 32 bpp |
Notes:
(1) 2 bpp bmp files are not valid in the original spec, and are
written as 8 bpp.
(2) pix with depth <= 8 bpp are written with a colormap.
16 bpp gray and 32 bpp rgb pix are written without a colormap.
(3) The transparency component in an rgba (spp = 4) pix is written.
(4) The bmp colormap entries, RGBA_QUAD, are the same as
the ones used for colormaps in leptonica. This allows
a simple memcpy for bmp output.
Definition at line 455 of file bmpio.c.
References RGBA_Quad::alpha, PixColormap::array, BMP_FileHeader::bfOffBits, BMP_FileHeader::bfSize, BMP_FileHeader::bfType, BMP_InfoHeader::biBitCount, BMP_InfoHeader::biClrImportant, BMP_InfoHeader::biClrUsed, BMP_InfoHeader::biCompression, BMP_InfoHeader::biHeight, BMP_InfoHeader::biPlanes, BMP_InfoHeader::biSize, BMP_InfoHeader::biSizeImage, BMP_InfoHeader::biWidth, BMP_InfoHeader::biXPelsPerMeter, BMP_InfoHeader::biYPelsPerMeter, RGBA_Quad::blue, BMP_FHBYTES, BMP_ID, BMP_IHBYTES, COLOR_BLUE, COLOR_GREEN, COLOR_RED, RGBA_Quad::green, L_ALPHA_CHANNEL, and RGBA_Quad::red.
Referenced by pixWriteStreamBmp().
| l_ok pixWriteStreamBmp | ( | FILE * | fp, |
| PIX * | pix ) |
| [in] | fp | file stream |
| [in] | pix | all depths |
Definition at line 410 of file bmpio.c.
References pixWriteMemBmp().
1.12.0