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      1 
      2 /*
      3  * Copyright 2006 The Android Open Source Project
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 
      9 
     10 #include "SkImageDecoder.h"
     11 #include "SkMovie.h"
     12 #include "SkStream.h"
     13 
     14 extern SkImageDecoder* SkImageDecoder_GIF_Factory(SkStream*);
     15 extern SkImageDecoder* SkImageDecoder_BMP_Factory(SkStream*);
     16 extern SkImageDecoder* SkImageDecoder_ICO_Factory(SkStream*);
     17 extern SkImageDecoder* SkImageDecoder_PNG_Factory(SkStream*);
     18 extern SkImageDecoder* SkImageDecoder_WBMP_Factory(SkStream*);
     19 extern SkImageDecoder* SkImageDecoder_JPEG_Factory(SkStream*);
     20 
     21 typedef SkImageDecoder* (*SkImageDecoderFactoryProc)(SkStream*);
     22 
     23 struct CodecFormat {
     24     SkImageDecoderFactoryProc   fProc;
     25     SkImageDecoder::Format      fFormat;
     26 };
     27 
     28 static const CodecFormat gPairs[] = {
     29 #if 0
     30     { SkImageDecoder_GIF_Factory,   SkImageDecoder::kGIF_Format },
     31     { SkImageDecoder_PNG_Factory,   SkImageDecoder::kPNG_Format },
     32     { SkImageDecoder_ICO_Factory,   SkImageDecoder::kICO_Format },
     33     { SkImageDecoder_WBMP_Factory,  SkImageDecoder::kWBMP_Format },
     34     { SkImageDecoder_BMP_Factory,   SkImageDecoder::kBMP_Format },
     35     { SkImageDecoder_JPEG_Factory,  SkImageDecoder::kJPEG_Format }
     36 #endif
     37 };
     38 
     39 SkImageDecoder* SkImageDecoder::Factory(SkStream* stream) {
     40     for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) {
     41         SkImageDecoder* codec = gPairs[i].fProc(stream);
     42         stream->rewind();
     43         if (NULL != codec) {
     44             return codec;
     45         }
     46     }
     47     return NULL;
     48 }
     49 
     50 bool SkImageDecoder::SupportsFormat(Format format) {
     51     for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) {
     52         if (gPairs[i].fFormat == format) {
     53             return true;
     54         }
     55     }
     56     return false;
     57 }
     58 
     59 /////////////////////////////////////////////////////////////////////////
     60 
     61 typedef SkMovie* (*SkMovieFactoryProc)(SkStream*);
     62 
     63 extern SkMovie* SkMovie_GIF_Factory(SkStream*);
     64 
     65 static const SkMovieFactoryProc gMovieProcs[] = {
     66 #if 0
     67     SkMovie_GIF_Factory
     68 #endif
     69 };
     70 
     71 SkMovie* SkMovie::DecodeStream(SkStream* stream) {
     72     for (unsigned i = 0; i < SK_ARRAY_COUNT(gMovieProcs); i++) {
     73         SkMovie* movie = gMovieProcs[i](stream);
     74         if (NULL != movie) {
     75             return movie;
     76         }
     77         stream->rewind();
     78     }
     79     return NULL;
     80 }
     81 
     82 /////////////////////////////////////////////////////////////////////////
     83 
     84 extern SkImageEncoder* SkImageEncoder_JPEG_Factory();
     85 extern SkImageEncoder* SkImageEncoder_PNG_Factory();
     86 
     87 SkImageEncoder* SkImageEncoder::Create(Type t) {
     88     switch (t) {
     89 #if 0
     90         case kJPEG_Type:
     91             return SkImageEncoder_JPEG_Factory();
     92         case kPNG_Type:
     93             return SkImageEncoder_PNG_Factory();
     94 #endif
     95         default:
     96             return NULL;
     97     }
     98 }
     99 
    100