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/*
* Copyright (C) 2016 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 "GLFunctorDrawable.h"
#include "GlFunctorLifecycleListener.h"
#include "RenderNode.h"
#include "SkClipStack.h"
#include <private/hwui/DrawGlInfo.h>
#include <GrContext.h>
namespace android {
namespace uirenderer {
namespace skiapipeline {
GLFunctorDrawable::~GLFunctorDrawable() {
if(mListener.get() != nullptr) {
mListener->onGlFunctorReleased(mFunctor);
}
}
void GLFunctorDrawable::syncFunctor() const {
(*mFunctor)(DrawGlInfo::kModeSync, nullptr);
}
static void setScissor(int viewportHeight, const SkIRect& clip) {
SkASSERT(!clip.isEmpty());
// transform to Y-flipped GL space, and prevent negatives
GLint y = viewportHeight - clip.fBottom;
GLint height = (viewportHeight - clip.fTop) - y;
glScissor(clip.fLeft, y, clip.width(), height);
}
void GLFunctorDrawable::onDraw(SkCanvas* canvas) {
if (canvas->getGrContext() == nullptr) {
SkDEBUGF(("Attempting to draw GLFunctor into an unsupported surface"));
return;
}
canvas->flush();
if (Properties::getRenderPipelineType() == RenderPipelineType::SkiaVulkan) {
canvas->clear(SK_ColorRED);
return;
}
SkImageInfo canvasInfo = canvas->imageInfo();
SkMatrix44 mat4(canvas->getTotalMatrix());
SkIRect ibounds = canvas->getDeviceClipBounds();
DrawGlInfo info;
info.clipLeft = ibounds.fLeft;
info.clipTop = ibounds.fTop;
info.clipRight = ibounds.fRight;
info.clipBottom = ibounds.fBottom;
// info.isLayer = hasLayer();
info.isLayer = false;
info.width = canvasInfo.width();
info.height = canvasInfo.height();
mat4.asColMajorf(&info.transform[0]);
//apply a simple clip with a scissor or a complex clip with a stencil
SkRegion clipRegion;
canvas->temporary_internal_getRgnClip(&clipRegion);
if (CC_UNLIKELY(clipRegion.isComplex())) {
//It is only a temporary solution to use a scissor to draw the stencil.
//There is a bug 31489986 to implement efficiently non-rectangular clips.
glDisable(GL_SCISSOR_TEST);
glDisable(GL_STENCIL_TEST);
glStencilMask(0xff);
glClearStencil(0);
glClear(GL_STENCIL_BUFFER_BIT);
glEnable(GL_SCISSOR_TEST);
SkRegion::Cliperator it(clipRegion, ibounds);
while (!it.done()) {
setScissor(info.height, it.rect());
glClearStencil(0x1);
glClear(GL_STENCIL_BUFFER_BIT);
it.next();
}
glDisable(GL_SCISSOR_TEST);
glStencilFunc(GL_EQUAL, 0x1, 0xff);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
glEnable(GL_STENCIL_TEST);
} else if (clipRegion.isEmpty()) {
glDisable(GL_STENCIL_TEST);
glDisable(GL_SCISSOR_TEST);
} else {
glDisable(GL_STENCIL_TEST);
glEnable(GL_SCISSOR_TEST);
setScissor(info.height, clipRegion.getBounds());
}
(*mFunctor)(DrawGlInfo::kModeDraw, &info);
canvas->getGrContext()->resetContext();
}
}; // namespace skiapipeline
}; // namespace uirenderer
}; // namespace android
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