/*
 * Copyright 2010 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "src/gpu/GrFixedClip.h"

#include "src/gpu/GrAppliedClip.h"
#include "src/gpu/GrRenderTargetContext.h"

bool GrFixedClip::quickContains(const SkRect& rect) const {
    if (fWindowRectsState.enabled()) {
        return false;
    }
    return !fScissorState.enabled() || GrClip::IsInsideClip(fScissorState.rect(), rect);
}

SkIRect GrFixedClip::getConservativeBounds(int w, int h) const {
    SkIRect devResult = this->GrClip::getConservativeBounds(w, h);
    if (fScissorState.enabled()) {
        if (!devResult.intersect(fScissorState.rect())) {
            devResult.setEmpty();
        }
    }
    return devResult;
}

bool GrFixedClip::isRRect(const SkRect& rtBounds, SkRRect* rr, GrAA* aa) const {
    if (fWindowRectsState.enabled()) {
        return false;
    }
    if (fScissorState.enabled()) {
        SkRect rect = SkRect::Make(fScissorState.rect());
        if (!rect.intersects(rtBounds)) {
            return false;
        }
        rr->setRect(rect);
        *aa = GrAA::kNo;
        return true;
    }
    return false;
};

bool GrFixedClip::apply(int rtWidth, int rtHeight, GrAppliedHardClip* out, SkRect* bounds) const {
    if (fScissorState.enabled()) {
        SkIRect tightScissor = SkIRect::MakeWH(rtWidth, rtHeight);
        if (!tightScissor.intersect(fScissorState.rect())) {
            return false;
        }
        if (IsOutsideClip(tightScissor, *bounds)) {
            return false;
        }
        if (!IsInsideClip(fScissorState.rect(), *bounds)) {
            out->addScissor(tightScissor, bounds);
        }
    }

    if (fWindowRectsState.enabled()) {
        out->addWindowRectangles(fWindowRectsState);
    }

    return true;
}