// Fold the clipRect into the drawBitmapRectToRect's src and dest rects
static void apply_8(SkDebugCanvas* canvas, int curCommand) {
    SkClipRectCommand* clip =
        (SkClipRectCommand*) canvas->getDrawCommandAt(curCommand+1);
    SkDrawBitmapRectCommand* dbmr =
        (SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+2);

    SkScalar newSrcLeft, newSrcTop;

    if (NULL != dbmr->srcRect()) {
        newSrcLeft = dbmr->srcRect()->fLeft + clip->rect().fLeft - dbmr->dstRect().fLeft;
        newSrcTop  = dbmr->srcRect()->fTop + clip->rect().fTop - dbmr->dstRect().fTop;
    } else {
        newSrcLeft = clip->rect().fLeft - dbmr->dstRect().fLeft;
        newSrcTop  = clip->rect().fTop - dbmr->dstRect().fTop;
    }

    SkRect newSrc = SkRect::MakeXYWH(newSrcLeft, newSrcTop,
                                     clip->rect().width(), clip->rect().height());

    dbmr->setSrcRect(newSrc);
    dbmr->setDstRect(clip->rect());

    // remove everything except the drawbitmaprect
    canvas->deleteDrawCommandAt(curCommand+3);
    canvas->deleteDrawCommandAt(curCommand+1);
    canvas->deleteDrawCommandAt(curCommand);
}
// Check for:
//    SAVE
//        CLIP_RECT
//        DRAW_RECT
//    RESTORE
// where the rect is entirely within the clip and the clip is an intersect
static bool check_2(SkDebugCanvas* canvas, int curCommand) {
    if (SAVE != canvas->getDrawCommandAt(curCommand)->getType() ||
        canvas->getSize() <= curCommand+4 ||
        CLIP_RECT != canvas->getDrawCommandAt(curCommand+1)->getType() ||
        DRAW_RECT != canvas->getDrawCommandAt(curCommand+2)->getType() ||
        RESTORE != canvas->getDrawCommandAt(curCommand+3)->getType()) {
        return false;
    }

    SkClipRectCommand* cr =
        (SkClipRectCommand*) canvas->getDrawCommandAt(curCommand+1);
    SkDrawRectCommand* dr =
        (SkDrawRectCommand*) canvas->getDrawCommandAt(curCommand+2);

    if (SkRegion::kIntersect_Op != cr->op()) {
        return false;
    }

    return cr->rect().contains(dr->rect());
}
// Check for:
//    SAVE
//        CLIP_RECT
//        DRAW_BITMAP_RECT_TO_RECT
//    RESTORE
// where the rect and drawBitmapRect dst exactly match
static bool check_4(SkDebugCanvas* canvas, int curCommand) {
    if (SAVE != canvas->getDrawCommandAt(curCommand)->getType() ||
        canvas->getSize() <= curCommand+4 ||
        CLIP_RECT != canvas->getDrawCommandAt(curCommand+1)->getType() ||
        DRAW_BITMAP_RECT_TO_RECT != canvas->getDrawCommandAt(curCommand+2)->getType() ||
        RESTORE != canvas->getDrawCommandAt(curCommand+3)->getType()) {
        return false;
    }

    SkClipRectCommand* cr =
        (SkClipRectCommand*) canvas->getDrawCommandAt(curCommand+1);
    SkDrawBitmapRectCommand* dbmr  =
        (SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+2);

    if (SkRegion::kIntersect_Op != cr->op()) {
        return false;
    }

    return dbmr->dstRect() == cr->rect();
}
Esempio n. 4
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// Check for:
//    SAVE
//        CLIP_RECT
//        DRAW_BITMAP_RECT_TO_RECT
//    RESTORE
// where the rect and drawBitmapRect dst exactly match
static bool check_4(SkDebugCanvas* canvas, int curCommand) {
    if (SkDrawCommand::kSave_OpType != canvas->getDrawCommandAt(curCommand)->getType() ||
        canvas->getSize() <= curCommand+4 ||
        SkDrawCommand::kClipRect_OpType != canvas->getDrawCommandAt(curCommand+1)->getType() ||
        SkDrawCommand::kDrawBitmapRect_OpType != canvas->getDrawCommandAt(curCommand+2)->getType() ||
        SkDrawCommand::kRestore_OpType != canvas->getDrawCommandAt(curCommand+3)->getType()) {
        return false;
    }

    SkClipRectCommand* cr =
        (SkClipRectCommand*) canvas->getDrawCommandAt(curCommand+1);
    SkDrawBitmapRectCommand* dbmr  =
        (SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+2);

    if (SkRegion::kIntersect_Op != cr->op()) {
        return false;
    }

    return dbmr->dstRect() == cr->rect();
}
// Check for:
//    SAVE
//       CLIP_RECT
//       DRAWBITMAPRECTTORECT
//    RESTORE
// where:
//      the drawBitmapRectToRect is a 1-1 copy from src to dest
//      the clip rect is BW and a subset of the drawBitmapRectToRect's dest rect
static bool check_8(SkDebugCanvas* canvas, int curCommand) {
    if (SAVE != canvas->getDrawCommandAt(curCommand)->getType() ||
        canvas->getSize() <= curCommand+4 ||
        CLIP_RECT != canvas->getDrawCommandAt(curCommand+1)->getType() ||
        DRAW_BITMAP_RECT_TO_RECT != canvas->getDrawCommandAt(curCommand+2)->getType() ||
        RESTORE != canvas->getDrawCommandAt(curCommand+3)->getType()) {
        return false;
    }

    SkClipRectCommand* clip =
        (SkClipRectCommand*) canvas->getDrawCommandAt(curCommand+1);
    SkDrawBitmapRectCommand* dbmr =
        (SkDrawBitmapRectCommand*) canvas->getDrawCommandAt(curCommand+2);

    if (clip->doAA() || SkRegion::kIntersect_Op != clip->op()) {
        return false;
    }

    // The src->dest mapping needs to be 1-to-1
    if (NULL == dbmr->srcRect()) {
        if (dbmr->bitmap().width() != dbmr->dstRect().width() ||
            dbmr->bitmap().height() != dbmr->dstRect().height()) {
            return false;
        }
    } else {
        if (dbmr->srcRect()->width() != dbmr->dstRect().width() ||
            dbmr->srcRect()->height() != dbmr->dstRect().height()) {
            return false;
        }
    }

    if (!dbmr->dstRect().contains(clip->rect())) {
        return false;
    }

    return true;
}