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"tjScaledSize"="tjGetScaledSize" (again)

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DRC
2011-02-26 20:15:27 +00:00
parent b8530db29f
commit c8ddbca289
1 changed files with 6 additions and 5 deletions
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11
turbojpeg.h
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@@ -283,8 +283,8 @@ DLLEXPORT int DLLCALL tjGetScaledSize(int input_width, int input_height,
[INPUT] dstbuf = pointer to user-allocated image buffer which will receive [INPUT] dstbuf = pointer to user-allocated image buffer which will receive
the bitmap image. This buffer should normally be pitch*scaled_height the bitmap image. This buffer should normally be pitch*scaled_height
bytes in size, where scaled_height is determined by calling bytes in size, where scaled_height is determined by calling
tjScaledSize() with the height of the desired output image. This pointer tjGetScaledSize() with the height of the desired output image. This
may also be used to decompress into a specific region of a pointer may also be used to decompress into a specific region of a
larger buffer. larger buffer.
[INPUT] width = desired width (in pixels) of the destination image. If this [INPUT] width = desired width (in pixels) of the destination image. If this
is smaller than the width of the JPEG image being decompressed, then is smaller than the width of the JPEG image being decompressed, then
@@ -296,9 +296,10 @@ DLLEXPORT int DLLCALL tjGetScaledSize(int input_width, int input_height,
scaled_width*pixelsize if the bitmap image is unpadded, else scaled_width*pixelsize if the bitmap image is unpadded, else
TJPAD(scaled_width*pixelsize) if each line of the bitmap is padded to the TJPAD(scaled_width*pixelsize) if each line of the bitmap is padded to the
nearest 32-bit boundary, such as is the case for Windows bitmaps. nearest 32-bit boundary, such as is the case for Windows bitmaps.
(NOTE: scaled_width can be determined by calling tjScaledSize().) You can (NOTE: scaled_width can be determined by calling tjGetScaledSize().) You
also be clever and use this parameter to skip lines, etc. Setting this can also be clever and use this parameter to skip lines, etc. Setting
parameter to 0 is the equivalent of setting it to scaled_width*pixelsize. this parameter to 0 is the equivalent of setting it to
scaled_width*pixelsize.
[INPUT] height = desired height (in pixels) of the destination image. If [INPUT] height = desired height (in pixels) of the destination image. If
this is smaller than the height of the JPEG image being decompressed, then this is smaller than the height of the JPEG image being decompressed, then
TurboJPEG will use scaling in the JPEG decompressor to generate the TurboJPEG will use scaling in the JPEG decompressor to generate the