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restore encode API compatibility

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protect WebPConfigLosslessPreset/WebPMemoryWriterClear w/a
WEBP_ENCODER_ABI_VERSION check

Change-Id: If4debc15fee172a3f18079bc2bd29eb8447bc14b
This commit is contained in:
James Zern
2014-07-22 20:24:59 -07:00
parent 793368e8c6
commit c2fc52e4ec
7 changed files with 61 additions and 19 deletions
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10
src/webp/encode.h
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@ -20,7 +20,7 @@
extern "C" {
#endif
#define WEBP_ENCODER_ABI_VERSION 0x0205 // MAJOR(8b) + MINOR(8b)
#define WEBP_ENCODER_ABI_VERSION 0x0202 // MAJOR(8b) + MINOR(8b)
// Note: forward declaring enumerations is not allowed in (strict) C and C++,
// the types are left here for reference.
@ -167,6 +167,7 @@ static WEBP_INLINE int WebPConfigPreset(WebPConfig* config,
WEBP_ENCODER_ABI_VERSION);
}
#if WEBP_ENCODER_ABI_VERSION > 0x0202
// Activate the lossless compression mode with the desired efficiency level
// between 0 (fastest, lowest compression) and 9 (slower, best compression).
// A good default level is '6', providing a fair tradeoff between compression
@ -174,6 +175,7 @@ static WEBP_INLINE int WebPConfigPreset(WebPConfig* config,
// This function will overwrite several fields from config: 'method', 'quality'
// and 'lossless'. Returns false in case of parameter error.
WEBP_EXTERN(int) WebPConfigLosslessPreset(WebPConfig* config, int level);
#endif
// Returns true if 'config' is non-NULL and all configuration parameters are
// within their valid ranges.
@ -229,12 +231,18 @@ struct WebPMemoryWriter {
// The following must be called first before any use.
WEBP_EXTERN(void) WebPMemoryWriterInit(WebPMemoryWriter* writer);
#if WEBP_ENCODER_ABI_VERSION > 0x0202
// The following must be called to deallocate writer->mem memory. The 'writer'
// object itself is not deallocated.
WEBP_EXTERN(void) WebPMemoryWriterClear(WebPMemoryWriter* writer);
#endif
// The custom writer to be used with WebPMemoryWriter as custom_ptr. Upon
// completion, writer.mem and writer.size will hold the coded data.
#if WEBP_ENCODER_ABI_VERSION > 0x0202
// writer.mem must be freed by calling WebPMemoryWriterClear.
#else
// writer.mem must be freed by calling 'free(writer.mem)'.
#endif
WEBP_EXTERN(int) WebPMemoryWrite(const uint8_t* data, size_t data_size,
const WebPPicture* picture);