// Copyright 2012 Google Inc. All Rights Reserved. // // Use of this source code is governed by a BSD-style license // that can be found in the COPYING file in the root of the source // tree. An additional intellectual property rights grant can be found // in the file PATENTS. All contributing project authors may // be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Data-types common to the mux and demux libraries. // // Author: Urvang (urvang@google.com) #ifndef WEBP_WEBP_MUX_TYPES_H_ #define WEBP_WEBP_MUX_TYPES_H_ #include <string.h> // memset() #include "./types.h" #ifdef __cplusplus extern "C" { #endif // Note: forward declaring enumerations is not allowed in (strict) C and C++, // the types are left here for reference. // typedef enum WebPFeatureFlags WebPFeatureFlags; // typedef enum WebPMuxAnimDispose WebPMuxAnimDispose; // typedef enum WebPMuxAnimBlend WebPMuxAnimBlend; typedef struct WebPData WebPData; // VP8X Feature Flags. typedef enum WebPFeatureFlags { ANIMATION_FLAG = 0x00000002, XMP_FLAG = 0x00000004, EXIF_FLAG = 0x00000008, ALPHA_FLAG = 0x00000010, ICCP_FLAG = 0x00000020, ALL_VALID_FLAGS = 0x0000003e } WebPFeatureFlags; // Dispose method (animation only). Indicates how the area used by the current // frame is to be treated before rendering the next frame on the canvas. typedef enum WebPMuxAnimDispose { WEBP_MUX_DISPOSE_NONE, // Do not dispose. WEBP_MUX_DISPOSE_BACKGROUND // Dispose to background color. } WebPMuxAnimDispose; // Blend operation (animation only). Indicates how transparent pixels of the // current frame are blended with those of the previous canvas. typedef enum WebPMuxAnimBlend { WEBP_MUX_BLEND, // Blend. WEBP_MUX_NO_BLEND // Do not blend. } WebPMuxAnimBlend; // Data type used to describe 'raw' data, e.g., chunk data // (ICC profile, metadata) and WebP compressed image data. // 'bytes' memory must be allocated using WebPMalloc() and such. struct WebPData { const uint8_t* bytes; size_t size; }; // Initializes the contents of the 'webp_data' object with default values. static WEBP_INLINE void WebPDataInit(WebPData* webp_data) { if (webp_data != NULL) { memset(webp_data, 0, sizeof(*webp_data)); } } // Clears the contents of the 'webp_data' object by calling WebPFree(). // Does not deallocate the object itself. static WEBP_INLINE void WebPDataClear(WebPData* webp_data) { if (webp_data != NULL) { WebPFree((void*)webp_data->bytes); WebPDataInit(webp_data); } } // Allocates necessary storage for 'dst' and copies the contents of 'src'. // Returns true on success. static WEBP_INLINE int WebPDataCopy(const WebPData* src, WebPData* dst) { if (src == NULL || dst == NULL) return 0; WebPDataInit(dst); if (src->bytes != NULL && src->size != 0) { dst->bytes = (uint8_t*)WebPMalloc(src->size); if (dst->bytes == NULL) return 0; memcpy((void*)dst->bytes, src->bytes, src->size); dst->size = src->size; } return 1; } #ifdef __cplusplus } // extern "C" #endif #endif // WEBP_WEBP_MUX_TYPES_H_ SIMPAN PERUBAHAN