| #include "SkRecordAnalysis.h" |
| |
| #include "SkShader.h" |
| #include "SkTLogic.h" |
| |
| /** SkRecords visitor to determine whether an instance may require an |
| "external" bitmap to rasterize. May return false positives. |
| Does not return true for bitmap text. |
| |
| Expected use is to determine whether images need to be decoded before |
| rasterizing a particular SkRecord. |
| */ |
| struct BitmapTester { |
| // Helpers. These create HasMember_bitmap and HasMember_paint. |
| SK_CREATE_MEMBER_DETECTOR(bitmap); |
| SK_CREATE_MEMBER_DETECTOR(paint); |
| |
| // Some commands have a paint, some have an optional paint. Either way, get back a pointer. |
| static const SkPaint* AsPtr(const SkPaint& p) { return &p; } |
| static const SkPaint* AsPtr(const SkRecords::Optional<SkPaint>& p) { return p; } |
| |
| |
| // Main entry for visitor: |
| // If the command has a bitmap directly, return true. |
| // If the command has a paint and the paint has a bitmap, return true. |
| // Otherwise, return false. |
| template <typename T> |
| bool operator()(const T& r) { return CheckBitmap(r); } |
| |
| |
| // If the command has a bitmap, of course we're going to play back bitmaps. |
| template <typename T> |
| static SK_WHEN(HasMember_bitmap<T>, bool) CheckBitmap(const T&) { return true; } |
| |
| // If not, look for one in its paint (if it has a paint). |
| template <typename T> |
| static SK_WHEN(!HasMember_bitmap<T>, bool) CheckBitmap(const T& r) { return CheckPaint(r); } |
| |
| // If we have a paint, dig down into the effects looking for a bitmap. |
| template <typename T> |
| static SK_WHEN(HasMember_paint<T>, bool) CheckPaint(const T& r) { |
| const SkPaint* paint = AsPtr(r.paint); |
| if (paint) { |
| const SkShader* shader = paint->getShader(); |
| if (shader && |
| shader->asABitmap(NULL, NULL, NULL) == SkShader::kDefault_BitmapType) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| // If we don't have a paint, that non-paint has no bitmap. |
| template <typename T> |
| static SK_WHEN(!HasMember_paint<T>, bool) CheckPaint(const T&) { return false; } |
| }; |
| |
| bool SkRecordWillPlaybackBitmaps(const SkRecord& record) { |
| BitmapTester tester; |
| for (unsigned i = 0; i < record.count(); i++) { |
| if (record.visit<bool>(i, tester)) { |
| return true; |
| } |
| } |
| return false; |
| } |