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-rw-r--r--skia/images/SkMovie_gif.cpp234
1 files changed, 0 insertions, 234 deletions
diff --git a/skia/images/SkMovie_gif.cpp b/skia/images/SkMovie_gif.cpp
deleted file mode 100644
index c7db017..0000000
--- a/skia/images/SkMovie_gif.cpp
+++ /dev/null
@@ -1,234 +0,0 @@
-/* libs/graphics/images/SkImageDecoder_libgif.cpp
-**
-** Copyright 2006, The Android Open Source Project
-**
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-** http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
-*/
-
-#include "SkMovie.h"
-#include "SkColor.h"
-#include "SkColorPriv.h"
-#include "SkStream.h"
-#include "SkTemplates.h"
-
-#include "gif_lib.h"
-
-class SkGIFMovie : public SkMovie {
-public:
- // we do NOT hold onto the stream, so it is OK if it is on the
- // stack of the caller
- SkGIFMovie(SkStream* stream);
- virtual ~SkGIFMovie();
-
-protected:
- virtual bool onGetInfo(Info*);
- virtual bool onSetTime(SkMSec);
- virtual bool onGetBitmap(SkBitmap*);
-
-private:
- GifFileType* fGIF;
- SavedImage* fCurrSavedImage;
-};
-
-SkMovie* SkMovie_GIF_StreamFactory(SkStream* stream) {
- char buf[GIF_STAMP_LEN];
- if (stream->read(buf, GIF_STAMP_LEN) == GIF_STAMP_LEN) {
- if (memcmp(GIF_STAMP, buf, GIF_STAMP_LEN) == 0 ||
- memcmp(GIF87_STAMP, buf, GIF_STAMP_LEN) == 0 ||
- memcmp(GIF89_STAMP, buf, GIF_STAMP_LEN) == 0) {
- stream->rewind();
- return SkNEW_ARGS(SkGIFMovie, (stream));
- }
- }
- return NULL;
-}
-
-SkMovie* SkMovie_GIF_MemoryFactory(const void* data, size_t length) {
- if (length > GIF_STAMP_LEN && !memcmp(GIF_STAMP, data, GIF_STAMP_LEN)) {
- SkMemoryStream stream(data, length);
- return SkNEW_ARGS(SkGIFMovie, (&stream));
- }
- return NULL;
-}
-
-static int Decode(GifFileType* fileType, GifByteType* out, int size) {
- SkStream* stream = (SkStream*) fileType->UserData;
- return (int) stream->read(out, size);
-}
-
-SkGIFMovie::SkGIFMovie(SkStream* stream)
-{
- fGIF = DGifOpen( stream, Decode );
- if (NULL == fGIF)
- return;
-
- if (DGifSlurp(fGIF) != GIF_OK)
- {
- DGifCloseFile(fGIF);
- fGIF = NULL;
- }
- fCurrSavedImage = NULL;
-}
-
-SkGIFMovie::~SkGIFMovie()
-{
- if (fGIF)
- DGifCloseFile(fGIF);
-}
-
-static SkMSec savedimage_duration(const SavedImage* image)
-{
- for (int j = 0; j < image->ExtensionBlockCount; j++)
- {
- if (image->ExtensionBlocks[j].Function == GRAPHICS_EXT_FUNC_CODE)
- {
- int size = image->ExtensionBlocks[j].ByteCount;
- SkASSERT(size >= 4);
- const uint8_t* b = (const uint8_t*)image->ExtensionBlocks[j].Bytes;
- return ((b[2] << 8) | b[1]) * 10;
- }
- }
- return 0;
-}
-
-bool SkGIFMovie::onGetInfo(Info* info)
-{
- if (NULL == fGIF)
- return false;
-
- SkMSec dur = 0;
- for (int i = 0; i < fGIF->ImageCount; i++)
- dur += savedimage_duration(&fGIF->SavedImages[i]);
-
- info->fDuration = dur;
- info->fWidth = fGIF->SWidth;
- info->fHeight = fGIF->SHeight;
- info->fIsOpaque = false; // how to compute?
- return true;
-}
-
-bool SkGIFMovie::onSetTime(SkMSec time)
-{
- if (NULL == fGIF)
- return false;
-
- SkMSec dur = 0;
- for (int i = 0; i < fGIF->ImageCount; i++)
- {
- dur += savedimage_duration(&fGIF->SavedImages[i]);
- if (dur >= time)
- {
- SavedImage* prev = fCurrSavedImage;
- fCurrSavedImage = &fGIF->SavedImages[i];
- return prev != fCurrSavedImage;
- }
- }
- fCurrSavedImage = &fGIF->SavedImages[fGIF->ImageCount - 1];
- return true;
-}
-
-bool SkGIFMovie::onGetBitmap(SkBitmap* bm)
-{
- GifFileType* gif = fGIF;
- if (NULL == gif)
- return false;
-
- // should we check for the Image cmap or the global (SColorMap) first?
- ColorMapObject* cmap = gif->SColorMap;
- if (cmap == NULL)
- cmap = gif->Image.ColorMap;
-
- if (cmap == NULL || gif->ImageCount < 1 || cmap->ColorCount != (1 << cmap->BitsPerPixel))
- {
- SkASSERT(!"bad colortable setup");
- return false;
- }
-
- const int width = gif->SWidth;
- const int height = gif->SHeight;
- if (width <= 0 || height <= 0) {
- return false;
- }
-
- SavedImage* gif_image = fCurrSavedImage;
- SkBitmap::Config config = SkBitmap::kIndex8_Config;
-
- SkColorTable* colorTable = SkNEW_ARGS(SkColorTable, (cmap->ColorCount));
- SkAutoUnref aur(colorTable);
-
- bm->setConfig(config, width, height, 0);
- if (!bm->allocPixels(colorTable)) {
- return false;
- }
-
- int transparent = -1;
- for (int i = 0; i < gif_image->ExtensionBlockCount; ++i) {
- ExtensionBlock* eb = gif_image->ExtensionBlocks + i;
- if (eb->Function == 0xF9 &&
- eb->ByteCount == 4) {
- bool has_transparency = ((eb->Bytes[0] & 1) == 1);
- if (has_transparency) {
- transparent = (unsigned char)eb->Bytes[3];
- }
- }
- }
-
- SkPMColor* colorPtr = colorTable->lockColors();
-
- if (transparent >= 0)
- memset(colorPtr, 0, cmap->ColorCount * 4);
- else
- colorTable->setFlags(colorTable->getFlags() | SkColorTable::kColorsAreOpaque_Flag);
-
- for (int index = 0; index < cmap->ColorCount; index++)
- {
- if (transparent != index)
- colorPtr[index] = SkPackARGB32(0xFF, cmap->Colors[index].Red,
- cmap->Colors[index].Green, cmap->Colors[index].Blue);
- }
- colorTable->unlockColors(true);
-
- unsigned char* in = (unsigned char*)gif_image->RasterBits;
- unsigned char* out = bm->getAddr8(0, 0);
- if (gif->Image.Interlace) {
-
- // deinterlace
- int row;
- // group 1 - every 8th row, starting with row 0
- for (row = 0; row < height; row += 8) {
- memcpy(out + width * row, in, width);
- in += width;
- }
-
- // group 2 - every 8th row, starting with row 4
- for (row = 4; row < height; row += 8) {
- memcpy(out + width * row, in, width);
- in += width;
- }
-
- // group 3 - every 4th row, starting with row 2
- for (row = 2; row < height; row += 4) {
- memcpy(out + width * row, in, width);
- in += width;
- }
-
- for (row = 1; row < height; row += 2) {
- memcpy(out + width * row, in, width);
- in += width;
- }
-
- } else {
- memcpy(out, in, width * height);
- }
- return true;
-}
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