[−][src]Module webp_dev::sys::webp
libwebp FFI.
Constants
Functions
| webp_blend_alpha⚠ | |
| webp_cleanup_transparent_area⚠ | Helper function: given a width x height plane of RGBA or YUV(A) samples clean-up or smoothen the YUV or RGB samples under fully transparent area, to help compressibility (no guarantee, though). |
| webp_config_init⚠ | Should always be called, to initialize a fresh WebPConfig structure before modification. |
| webp_config_init_internal⚠ | Internal, version-checked, entry point |
| webp_config_lossless_preset⚠ | Activate the lossless compression mode with the desired efficiency level between 0 (fastest, lowest compression) and 9 (slower, best compression). |
| webp_config_preset⚠ | This function will initialize the configuration according to a predefined set of parameters (referred to by 'preset') and a given quality factor. |
| webp_decode⚠ | Non-incremental version. This version decodes the full data at once, taking 'config' into account. |
| webp_decode_argb⚠ | Same as WebPDecodeRGBA, but returning A, R, G, B, A, R, G, B... ordered data. |
| webp_decode_argb_into⚠ | |
| webp_decode_bgr⚠ | Same as WebPDecodeRGB, but returning B, G, R, B, G, R... ordered data. |
| webp_decode_bgr_into⚠ | |
| webp_decode_bgra⚠ | Same as WebPDecodeRGBA, but returning B, G, R, A, B, G, R, A... ordered data. |
| webp_decode_rgb⚠ | Same as WebPDecodeRGBA, but returning R, G, B, R, G, B... ordered data. If the bitstream contains transparency, it is ignored. |
| webp_decode_rgb_into⚠ | RGB and BGR variants. Here too the transparency information, if present, will be dropped and ignored. |
| webp_decode_rgba⚠ | Decodes WebP images pointed to by 'data' and returns RGBA samples, along with the dimensions in *width and *height. |
| webp_decode_rgba_into⚠ | These five functions are variants of the above ones, that decode the image directly into a pre-allocated buffer 'output_buffer'. |
| webp_decode_yuv⚠ | Decode WebP images pointed to by 'data' to Y'UV format(*). |
| webp_decode_yuv_into⚠ | WebPDecodeYUVInto() is a variant of WebPDecodeYUV() that operates directly into pre-allocated luma/chroma plane buffers. |
| webp_decodebgra_into⚠ | |
| webp_encode⚠ | Main call |
| webp_encode_bgr⚠ | One-stop-shop call! No questions asked: |
| webp_encode_bgra⚠ | One-stop-shop call! No questions asked: |
| webp_encode_lossless_bgr⚠ | One-stop-shop call! No questions asked: |
| webp_encode_lossless_bgra⚠ | One-stop-shop call! No questions asked: |
| webp_encode_lossless_rgb⚠ | One-stop-shop call! No questions asked: |
| webp_encode_lossless_rgba⚠ | One-stop-shop call! No questions asked: |
| webp_encode_rgb⚠ | One-stop-shop call! No questions asked: |
| webp_encode_rgba⚠ | One-stop-shop call! No questions asked: |
| webp_free⚠ | Releases memory returned by the WebPDecode*() functions (from decode.h). |
| webp_free_dec_buffer⚠ | Free any memory associated with the buffer. Must always be called last. |
| webp_get_decoder_version⚠ | Return the decoder's version number, packed in hexadecimal using 8bits for each of major/minor/revision. |
| webp_get_encoder_version⚠ | Return the encoder's version number, packed in hexadecimal using 8bits for each of major/minor/revision. |
| webp_get_features_internal⚠ | Internal, version-checked, entry point. |
| webp_get_info⚠ | Retrieve basic header information: width, height. |
| webp_iappend⚠ | Copies and decodes the next available data. |
| webp_idec_get_rgb⚠ | Returns the RGB/A image decoded so far. |
| webp_idec_get_yuva⚠ | Same as above function to get a YUVA image. |
| webp_idecode⚠ | Instantiate a new incremental decoder object with the requested configuration. |
| webp_idecoded_area⚠ | Generic call to retrieve information about the displayable area. |
| webp_idelete⚠ | Deletes the WebPIDecoder object and associated memory. |
| webp_inew_decoder⚠ | Creates a new incremental decoder with the supplied buffer parameter. |
| webp_inew_rgb⚠ | This function allocates and initializes an incremental-decoder object, which will output the RGB/A samples specified by 'csp' into a preallocated buffer 'output_buffer'. |
| webp_inew_yuv⚠ | Deprecated version of the above, without the alpha plane. |
| webp_inew_yuva⚠ | This function allocates and initializes an incremental-decoder object, which will output the raw luma/chroma samples into a preallocated planes if supplied. |
| webp_init_dec_buffer_internal⚠ | Internal, version-checked, entry point |
| webp_init_decoder_config_internal⚠ | Internal, version-checked, entry point |
| webp_iupdate⚠ | A variant of the above function to be used when data buffer contains partial data from the beginning. |
| webp_memory_write⚠ | WebPMemoryWrite: a special WebPWriterFunction that writes to memory using the following WebPMemoryWriter object (to be set as a custom_ptr). |
| webp_memory_writer_clear⚠ | The following must be called to deallocate writer->mem memory. |
| webp_memory_writer_init⚠ | The following must be called first before any use. |
| webp_picture_alloc⚠ | Convenience allocation / deallocation based on picture->width/height |
| webp_picture_argb_to_yuva⚠ | Converts picture->argb data to the YUV420A format. |
| webp_picture_argb_to_yuva_dithered⚠ | 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). |
| webp_picture_copy⚠ | Copy the pixels of *src into *dst, using WebPPictureAlloc. |
| webp_picture_crop⚠ | self-crops a picture to the rectangle defined by top/left/width/height. |
| webp_picture_distortion⚠ | Compute PSNR, SSIM or LSIM distortion metric between two pictures. |
| webp_picture_free⚠ | Release the memory allocated by WebPPictureAlloc() or WebPPictureImport*(). |
| webp_picture_has_transparency⚠ | Scan the picture 'picture' for the presence of non fully opaque alpha values. |
| webp_picture_import_bgr⚠ | |
| webp_picture_import_bgra⚠ | |
| webp_picture_import_bgrx⚠ | |
| webp_picture_import_rgb⚠ | Colorspace conversion function to import RGB samples. |
| webp_picture_import_rgba⚠ | Same as |
| webp_picture_import_rgbx⚠ | Imports the RGB direct from the 32-bit format input buffer ignoring the alpha channel. |
| webp_picture_init⚠ | Should always be called, to initialize the structure. |
| webp_picture_init_internal⚠ | Internal, version-checked, entry point |
| webp_picture_is_view⚠ | Returns true if the 'picture' is actually a view and therefore does not own the memory for pixels. |
| webp_picture_rescale⚠ | Rescale a picture to new dimension width x height. |
| webp_picture_sharp_argb_to_yuva⚠ | Performs 'sharp' RGBA->YUVA420 downsampling and colorspace conversion. |
| webp_picture_smart_argb_to_yuva⚠ | kept for backward compatibility |
| webp_picture_view⚠ | Extracts a view from 'src' picture into 'dst'. |
| webp_picture_yuva_to_argb⚠ | Converts picture->yuv to picture->argb and sets picture->use_argb to true. |
| webp_plane_distortion⚠ | Compute the single distortion for packed planes of samples. |
| webp_validate_config⚠ | Returns true if 'config' is non-NULL and all configuration parameters are within their valid ranges. |
Type Definitions
| VP8StatusCode | Enumeration of the status codes. |
| WebPAuxStats | Structure for storing auxiliary statistics. |
| WebPBitstreamFeatures | Features gathered from the bitstream. |
| WebPCSPMode | Colorspaces. |
| WebPConfig | Compression parameters. |
| WebPDecBuffer | WebPDecBuffer: Generic structure for describing the output sample buffer. |
| WebPDecoderConfig | Main object storing the configuration for advanced decoding. |
| WebPDecoderOptions | Decoding options |
| WebPEncCSP | Color spaces. |
| WebPEncodingError | Encoding error conditions. |
| WebPIDecoder | |
| WebPImageHint | Image characteristics hint for the underlying encoder. |
| WebPMemoryWriter | WebPMemoryWrite: a special WebPWriterFunction that writes to memory using the following WebPMemoryWriter object (to be set as a custom_ptr). |
| WebPPicture | Main exchange structure (input samples, output bytes, statistics) |
| WebPPreset | Enumerate some predefined settings for WebPConfig, depending on the type of source picture. |
| WebPProgressHook | Progress hook, called from time to time to report progress. |
| WebPRGBABuffer | WebPDecBuffer: Generic structure for describing the output sample buffer. |
| WebPWriterFunction | Signature for output function. |
| WebPYUVABuffer | WebPDecBuffer: Generic structure for describing the output sample buffer. |