mirror of https://github.com/axmolengine/axmol.git
82 lines
3.1 KiB
C
82 lines
3.1 KiB
C
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Extended interfaces for JPEG, JPEG2000 and JBIG2 decoders **/
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typedef struct
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{
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/** Initialize the decoding context, with memory allocator provided by FPDFEMB.
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Implementation should return a pointer to the decoding context.
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*/
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void* (*Init)(void* (*alloc_func)(unsigned int), void (*free_func)(void*));
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/** Finish with the decoding. */
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void (*Finish)(void* pContext);
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/** Input JPEG encoded data from the source.
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This function may be called multiple times during decoding progress.
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*/
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void (*Input)(void* pContext, const unsigned char* src_buf, unsigned long src_size);
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/** Read the header information. Return non-zero for success, 0 for failure */
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int (*ReadHeader)(void* pContext);
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/** Get info from the decoder, including image width, height and number of components */
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void (*GetInfo)(void* pContext, int* width, int* height, int* nComps);
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/** Read one scanline from decoded image */
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int (*ReadScanline)(void* pContext, unsigned char* dest_buf);
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/** Get number of available source bytes left in the input stream */
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unsigned long (*GetAvailInput)(void* pContext);
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} FPDFEMB_JPEG_DECODER;
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void FPDFEMB_SetJpegDecoder(FPDFEMB_JPEG_DECODER* pDecoder);
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typedef struct
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{
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/** Initialize the decoder with the full source data.
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Implementation should return a pointer to the context.
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*/
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void* (*Init)(const unsigned char* src_buf, unsigned long src_size);
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/** Destroy the context */
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void (*Finish)(void* context);
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/** Get image info from the context, including width, height, number of components
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in original codestream, and number of components in output image. For some
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particular type of encoded image, like paletted image, these two numbers of
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components may vary.
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*/
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void (*GetInfo)(void* context, unsigned long* width, unsigned long* height,
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unsigned long* codestream_nComps, unsigned long* output_nComps);
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/** Do the real data decoding, output to a pre-allocated buffer.
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bTranslateColor indicates whether the decoder should use JPEG2000 embedded
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color space info to translate image into sRGB color space.
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"offsets" array describes the byte order of all components. For example,
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{2,1,0} means the first components is output to last byte.
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*/
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void (*Decode)(void* context, unsigned char* dest_buf, int pitch,
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int bTranslateColor, unsigned char* offsets);
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} FPDFEMB_JPEG2000_DECODER;
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void FPDFEMB_SetJpeg2000Decoder(FPDFEMB_JPEG2000_DECODER* pDecoder);
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typedef struct
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{
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/** Do the whole decoding process. Supplied parameters include width, height, source image
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data and size, global data and size (can be shared among different images), destination
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buffer and scanline pitch in dest buffer.
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*/
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void (*Decode)(unsigned long width, unsigned long height, const unsigned char* src_buf,
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unsigned long src_size, const unsigned char* global_buf, unsigned long global_size,
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unsigned char* dest_buf, int dest_pitch);
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} FPDFEMB_JBIG2_DECODER;
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void FPDFEMB_SetJbig2Decoder(FPDFEMB_JBIG2_DECODER* pDecoder);
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#ifdef __cplusplus
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};
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#endif
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