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populate 'libwebpextras' with: import gray, rgb565 and rgb4444 functions

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update makefile.unix to provide 'make extras' building instructions.

note: input ordering depends on WEBP_SWAP_16BIT_CSP for rgb565 and rgb4444

Change-Id: I6f22d32189d9ba2619146a9714cedabfe28e2ad0
This commit is contained in:
Pascal Massimino
2015-04-15 02:14:08 -07:00
parent b69a6c35b2
commit af74c1453b
3 changed files with 114 additions and 2 deletions
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17
src/webp/extras.h
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@ -17,6 +17,8 @@
extern "C" {
#endif
#include "./encode.h"
#define WEBP_EXTRAS_ABI_VERSION 0x0000 // MAJOR(8b) + MINOR(8b)
//------------------------------------------------------------------------------
@ -25,6 +27,21 @@ extern "C" {
// 8bits for each of major/minor/revision. E.g: v2.5.7 is 0x020507.
WEBP_EXTERN(int) WebPGetExtrasVersion(void);
//------------------------------------------------------------------------------
// Ad-hoc colorspace importers.
// Import luma sample (gray scale image) into 'picture'. The 'picture'
// width and height must be set prior to calling this function.
WEBP_EXTERN(int) WebPImportGray(const uint8_t* gray, WebPPicture* picture);
// Import rgb sample in RGB565 packed format into 'picture'. The 'picture'
// width and height must be set prior to calling this function.
WEBP_EXTERN(int) WebPImportRGB565(const uint8_t* rgb565, WebPPicture* pic);
// Import rgb sample in RGB4444 packed format into 'picture'. The 'picture'
// width and height must be set prior to calling this function.
WEBP_EXTERN(int) WebPImportRGB4444(const uint8_t* rgb4444, WebPPicture* pic);
//------------------------------------------------------------------------------
#ifdef __cplusplus