diff options
Diffstat (limited to 'chromium/third_party/libwebp/webp/encode.h')
| -rw-r--r-- | chromium/third_party/libwebp/webp/encode.h | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/chromium/third_party/libwebp/webp/encode.h b/chromium/third_party/libwebp/webp/encode.h index 726992f5704..7a428b4e6ef 100644 --- a/chromium/third_party/libwebp/webp/encode.h +++ b/chromium/third_party/libwebp/webp/encode.h @@ -16,11 +16,11 @@ #include "./types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -#define WEBP_ENCODER_ABI_VERSION 0x0201 // 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. @@ -117,7 +117,8 @@ struct WebPConfig { int show_compressed; // if true, export the compressed picture back. // In-loop filtering is not applied. - int preprocessing; // preprocessing filter (0=none, 1=segment-smooth) + int preprocessing; // preprocessing filter: + // 0=none, 1=segment-smooth, 2=pseudo-random dithering int partitions; // log2(number of token partitions) in [0..3]. Default // is set to 0 for easier progressive decoding. int partition_limit; // quality degradation allowed to fit the 512k limit @@ -443,6 +444,13 @@ WEBP_EXTERN(int) WebPPictureImportBGRX( WEBP_EXTERN(int) WebPPictureARGBToYUVA(WebPPicture* picture, WebPEncCSP colorspace); +// Same as WebPPictureARGBToYUVA(), but the conversion is done using +// pseudo-random dithering with a strength 'dithering' between +// 0.0 (no dithering) and 1.0 (maximum dithering). This is useful +// for photographic picture. +WEBP_EXTERN(int) WebPPictureARGBToYUVADithered( + WebPPicture* picture, WebPEncCSP colorspace, float dithering); + // Converts picture->yuv to picture->argb and sets picture->use_argb to true. // The input format must be YUV_420 or YUV_420A. // Note that the use of this method is discouraged if one has access to the @@ -461,6 +469,11 @@ WEBP_EXTERN(void) WebPCleanupTransparentArea(WebPPicture* picture); // alpha plane can be ignored altogether e.g.). WEBP_EXTERN(int) WebPPictureHasTransparency(const WebPPicture* picture); +// Remove the transparency information (if present) by blending the color with +// the background color 'background_rgb' (specified as 24bit RGB triplet). +// After this call, all alpha values are reset to 0xff. +WEBP_EXTERN(void) WebPBlendAlpha(WebPPicture* pic, uint32_t background_rgb); + //------------------------------------------------------------------------------ // Main call @@ -478,7 +491,7 @@ WEBP_EXTERN(int) WebPEncode(const WebPConfig* config, WebPPicture* picture); //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif |