| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| // Some shared code used by both SkBigPicture and SkMiniPicture. |
| // SkTextHunter -- SkRecord visitor that returns true when the op draws text. |
| // SkBitmapHunter -- SkRecord visitor that returns true when the op draws a bitmap or image. |
| // SkPathCounter -- SkRecord visitor that counts paths that draw slowly on the GPU. |
| |
| #include "SkPathEffect.h" |
| #include "SkRecords.h" |
| #include "SkTLogic.h" |
| |
| struct SkTextHunter { |
| // Most ops never have text. Some always do. Subpictures know themeselves. |
| template <typename T> bool operator()(const T&) { return false; } |
| bool operator()(const SkRecords::DrawPosText&) { return true; } |
| bool operator()(const SkRecords::DrawPosTextH&) { return true; } |
| bool operator()(const SkRecords::DrawText&) { return true; } |
| bool operator()(const SkRecords::DrawTextBlob&) { return true; } |
| bool operator()(const SkRecords::DrawTextOnPath&) { return true; } |
| bool operator()(const SkRecords::DrawPicture& op) { return op.picture->hasText(); } |
| }; |
| |
| |
| // N.B. This name is slightly historical: hunting season is now open for SkImages too. |
| struct SkBitmapHunter { |
| // Helpers. These let us detect the presence of struct members with particular names. |
| SK_CREATE_MEMBER_DETECTOR(bitmap); |
| SK_CREATE_MEMBER_DETECTOR(image); |
| SK_CREATE_MEMBER_DETECTOR(paint); |
| |
| template <typename T> |
| struct HasMember_bitmap_or_image { |
| static const bool value = HasMember_bitmap<T>::value || HasMember_image<T>::value; |
| }; |
| |
| // Some ops 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 op is a DrawPicture, recurse. |
| // If the op has a bitmap or image directly, return true. |
| // If the op has a paint and the paint has a bitmap, return true. |
| // Otherwise, return false. |
| bool operator()(const SkRecords::DrawPicture& op) { return op.picture->willPlayBackBitmaps(); } |
| |
| template <typename T> |
| bool operator()(const T& r) { return CheckBitmap(r); } |
| |
| // If the op has a bitmap, of course we're going to play back bitmaps. |
| template <typename T> |
| static SK_WHEN(HasMember_bitmap_or_image<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_or_image<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->isABitmap()) { |
| 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; } |
| }; |
| |
| // TODO: might be nicer to have operator() return an int (the number of slow paths) ? |
| struct SkPathCounter { |
| SK_CREATE_MEMBER_DETECTOR(paint); |
| |
| // Some ops 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; } |
| |
| SkPathCounter() : fNumSlowPathsAndDashEffects(0) {} |
| |
| // Recurse into nested pictures. |
| void operator()(const SkRecords::DrawPicture& op) { |
| fNumSlowPathsAndDashEffects += op.picture->numSlowPaths(); |
| } |
| |
| void checkPaint(const SkPaint* paint) { |
| if (paint && paint->getPathEffect()) { |
| // Initially assume it's slow. |
| fNumSlowPathsAndDashEffects++; |
| } |
| } |
| |
| void operator()(const SkRecords::DrawPoints& op) { |
| this->checkPaint(&op.paint); |
| const SkPathEffect* effect = op.paint.getPathEffect(); |
| if (effect) { |
| SkPathEffect::DashInfo info; |
| SkPathEffect::DashType dashType = effect->asADash(&info); |
| if (2 == op.count && SkPaint::kRound_Cap != op.paint.getStrokeCap() && |
| SkPathEffect::kDash_DashType == dashType && 2 == info.fCount) { |
| fNumSlowPathsAndDashEffects--; |
| } |
| } |
| } |
| |
| void operator()(const SkRecords::DrawPath& op) { |
| this->checkPaint(&op.paint); |
| if (op.paint.isAntiAlias() && !op.path.isConvex()) { |
| SkPaint::Style paintStyle = op.paint.getStyle(); |
| const SkRect& pathBounds = op.path.getBounds(); |
| if (SkPaint::kStroke_Style == paintStyle && |
| 0 == op.paint.getStrokeWidth()) { |
| // AA hairline concave path is not slow. |
| } else if (SkPaint::kFill_Style == paintStyle && pathBounds.width() < 64.f && |
| pathBounds.height() < 64.f && !op.path.isVolatile()) { |
| // AADF eligible concave path is not slow. |
| } else { |
| fNumSlowPathsAndDashEffects++; |
| } |
| } |
| } |
| |
| template <typename T> |
| SK_WHEN(HasMember_paint<T>, void) operator()(const T& op) { |
| this->checkPaint(AsPtr(op.paint)); |
| } |
| |
| template <typename T> |
| SK_WHEN(!HasMember_paint<T>, void) operator()(const T& op) { /* do nothing */ } |
| |
| int fNumSlowPathsAndDashEffects; |
| }; |