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/*
* Copyright (C) 2015 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 "BakedOpRenderer.h"
#include "Caches.h"
#include "Glop.h"
#include "GlopBuilder.h"
#include "renderstate/OffscreenBufferPool.h"
#include "renderstate/RenderState.h"
#include "utils/GLUtils.h"
#include "VertexBuffer.h"
#include <algorithm>
namespace android {
namespace uirenderer {
OffscreenBuffer* BakedOpRenderer::startTemporaryLayer(uint32_t width, uint32_t height) {
LOG_ALWAYS_FATAL_IF(mRenderTarget.offscreenBuffer, "already has layer...");
OffscreenBuffer* buffer = mRenderState.layerPool().get(mRenderState, width, height);
startRepaintLayer(buffer, Rect(width, height));
return buffer;
}
void BakedOpRenderer::startRepaintLayer(OffscreenBuffer* offscreenBuffer, const Rect& repaintRect) {
LOG_ALWAYS_FATAL_IF(mRenderTarget.offscreenBuffer, "already has layer...");
// subtract repaintRect from region, since it will be regenerated
if (repaintRect.contains(0, 0,
offscreenBuffer->viewportWidth, offscreenBuffer->viewportHeight)) {
// repaint full layer, so throw away entire region
offscreenBuffer->region.clear();
} else {
offscreenBuffer->region.subtractSelf(android::Rect(repaintRect.left, repaintRect.top,
repaintRect.right, repaintRect.bottom));
}
mRenderTarget.offscreenBuffer = offscreenBuffer;
// create and bind framebuffer
mRenderTarget.frameBufferId = mRenderState.createFramebuffer();
mRenderState.bindFramebuffer(mRenderTarget.frameBufferId);
// attach the texture to the FBO
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
offscreenBuffer->texture.id(), 0);
GL_CHECKPOINT(LOW);
LOG_ALWAYS_FATAL_IF(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE,
"framebuffer incomplete!");
// Change the viewport & ortho projection
setViewport(offscreenBuffer->viewportWidth, offscreenBuffer->viewportHeight);
clearColorBuffer(repaintRect);
}
void BakedOpRenderer::endLayer() {
if (mRenderTarget.stencil) {
// if stencil was used for clipping, detach it and return it to pool
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
GL_CHECKPOINT(MODERATE);
mCaches.renderBufferCache.put(mRenderTarget.stencil);
mRenderTarget.stencil = nullptr;
}
mRenderTarget.lastStencilClip = nullptr;
mRenderTarget.offscreenBuffer->updateMeshFromRegion();
mRenderTarget.offscreenBuffer = nullptr; // It's in drawLayerOp's hands now.
// Detach the texture from the FBO
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
GL_CHECKPOINT(LOW);
mRenderState.deleteFramebuffer(mRenderTarget.frameBufferId);
mRenderTarget.frameBufferId = 0;
}
OffscreenBuffer* BakedOpRenderer::copyToLayer(const Rect& area) {
OffscreenBuffer* buffer = mRenderState.layerPool().get(mRenderState,
area.getWidth(), area.getHeight());
if (!area.isEmpty()) {
mCaches.textureState().activateTexture(0);
mCaches.textureState().bindTexture(buffer->texture.id());
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
area.left, mRenderTarget.viewportHeight - area.bottom,
area.getWidth(), area.getHeight());
}
return buffer;
}
void BakedOpRenderer::startFrame(uint32_t width, uint32_t height, const Rect& repaintRect) {
LOG_ALWAYS_FATAL_IF(mRenderTarget.frameBufferId != 0, "primary framebufferId must be 0");
mRenderState.bindFramebuffer(0);
setViewport(width, height);
if (!mOpaque) {
clearColorBuffer(repaintRect);
}
mRenderState.debugOverdraw(true, true);
}
void BakedOpRenderer::endFrame(const Rect& repaintRect) {
if (CC_UNLIKELY(Properties::debugOverdraw)) {
ClipRect overdrawClip(repaintRect);
Rect viewportRect(mRenderTarget.viewportWidth, mRenderTarget.viewportHeight);
// overdraw visualization
for (int i = 1; i <= 4; i++) {
if (i < 4) {
// nth level of overdraw tests for n+1 draws per pixel
mRenderState.stencil().enableDebugTest(i + 1, false);
} else {
// 4th level tests for 4 or higher draws per pixel
mRenderState.stencil().enableDebugTest(4, true);
}
SkPaint paint;
paint.setColor(mCaches.getOverdrawColor(i));
Glop glop;
GlopBuilder(mRenderState, mCaches, &glop)
.setRoundRectClipState(nullptr)
.setMeshUnitQuad()
.setFillPaint(paint, 1.0f)
.setTransform(Matrix4::identity(), TransformFlags::None)
.setModelViewMapUnitToRect(viewportRect)
.build();
renderGlop(nullptr, &overdrawClip, glop);
}
mRenderState.stencil().disable();
}
// Note: we leave FBO 0 renderable here, for post-frame-content decoration
}
void BakedOpRenderer::setViewport(uint32_t width, uint32_t height) {
mRenderTarget.viewportWidth = width;
mRenderTarget.viewportHeight = height;
mRenderTarget.orthoMatrix.loadOrtho(width, height);
mRenderState.setViewport(width, height);
mRenderState.blend().syncEnabled();
}
void BakedOpRenderer::clearColorBuffer(const Rect& rect) {
if (rect.contains(Rect(mRenderTarget.viewportWidth, mRenderTarget.viewportHeight))) {
// Full viewport is being cleared - disable scissor
mRenderState.scissor().setEnabled(false);
} else {
// Requested rect is subset of viewport - scissor to it to avoid over-clearing
mRenderState.scissor().setEnabled(true);
mRenderState.scissor().set(rect.left, mRenderTarget.viewportHeight - rect.bottom,
rect.getWidth(), rect.getHeight());
}
glClear(GL_COLOR_BUFFER_BIT);
if (!mRenderTarget.frameBufferId) mHasDrawn = true;
}
Texture* BakedOpRenderer::getTexture(const SkBitmap* bitmap) {
Texture* texture = mRenderState.assetAtlas().getEntryTexture(bitmap->pixelRef());
if (!texture) {
return mCaches.textureCache.get(bitmap);
}
return texture;
}
void BakedOpRenderer::drawRects(const float* rects, int count, const SkPaint* paint) {
std::vector<Vertex> vertices;
vertices.reserve(count);
Vertex* vertex = vertices.data();
for (int index = 0; index < count; index += 4) {
float l = rects[index + 0];
float t = rects[index + 1];
float r = rects[index + 2];
float b = rects[index + 3];
Vertex::set(vertex++, l, t);
Vertex::set(vertex++, r, t);
Vertex::set(vertex++, l, b);
Vertex::set(vertex++, r, b);
}
LOG_ALWAYS_FATAL_IF(mRenderTarget.frameBufferId != 0, "decoration only supported for FBO 0");
// TODO: Currently assume full FBO damage, due to FrameInfoVisualizer::unionDirty.
// Should should scissor/set mHasDrawn safely.
mRenderState.scissor().setEnabled(false);
mHasDrawn = true;
Glop glop;
GlopBuilder(mRenderState, mCaches, &glop)
.setRoundRectClipState(nullptr)
.setMeshIndexedQuads(vertices.data(), count / 4)
.setFillPaint(*paint, 1.0f)
.setTransform(Matrix4::identity(), TransformFlags::None)
.setModelViewIdentityEmptyBounds()
.build();
mRenderState.render(glop, mRenderTarget.orthoMatrix);
}
// clears and re-fills stencil with provided rendertarget space quads,
// and then put stencil into test mode
void BakedOpRenderer::setupStencilQuads(std::vector<Vertex>& quadVertices,
int incrementThreshold) {
mRenderState.stencil().enableWrite(incrementThreshold);
mRenderState.stencil().clear();
Glop glop;
GlopBuilder(mRenderState, mCaches, &glop)
.setRoundRectClipState(nullptr)
.setMeshIndexedQuads(quadVertices.data(), quadVertices.size() / 4)
.setFillBlack()
.setTransform(Matrix4::identity(), TransformFlags::None)
.setModelViewIdentityEmptyBounds()
.build();
mRenderState.render(glop, mRenderTarget.orthoMatrix);
mRenderState.stencil().enableTest(incrementThreshold);
}
void BakedOpRenderer::setupStencilRectList(const ClipBase* clip) {
LOG_ALWAYS_FATAL_IF(clip->mode != ClipMode::RectangleList, "can't rectlist clip without rectlist");
auto&& rectList = reinterpret_cast<const ClipRectList*>(clip)->rectList;
int quadCount = rectList.getTransformedRectanglesCount();
std::vector<Vertex> rectangleVertices;
rectangleVertices.reserve(quadCount * 4);
for (int i = 0; i < quadCount; i++) {
const TransformedRectangle& tr(rectList.getTransformedRectangle(i));
const Matrix4& transform = tr.getTransform();
Rect bounds = tr.getBounds();
if (transform.rectToRect()) {
// If rectToRect, can simply map bounds before storing verts
transform.mapRect(bounds);
bounds.doIntersect(clip->rect);
if (bounds.isEmpty()) {
continue; // will be outside of scissor, skip
}
}
rectangleVertices.push_back(Vertex{bounds.left, bounds.top});
rectangleVertices.push_back(Vertex{bounds.right, bounds.top});
rectangleVertices.push_back(Vertex{bounds.left, bounds.bottom});
rectangleVertices.push_back(Vertex{bounds.right, bounds.bottom});
if (!transform.rectToRect()) {
// If not rectToRect, must map each point individually
for (auto cur = rectangleVertices.end() - 4; cur < rectangleVertices.end(); cur++) {
transform.mapPoint(cur->x, cur->y);
}
}
}
setupStencilQuads(rectangleVertices, rectList.getTransformedRectanglesCount());
}
void BakedOpRenderer::setupStencilRegion(const ClipBase* clip) {
LOG_ALWAYS_FATAL_IF(clip->mode != ClipMode::Region, "can't region clip without region");
auto&& region = reinterpret_cast<const ClipRegion*>(clip)->region;
std::vector<Vertex> regionVertices;
SkRegion::Cliperator it(region, clip->rect.toSkIRect());
while (!it.done()) {
const SkIRect& r = it.rect();
regionVertices.push_back(Vertex{(float)r.fLeft, (float)r.fTop});
regionVertices.push_back(Vertex{(float)r.fRight, (float)r.fTop});
regionVertices.push_back(Vertex{(float)r.fLeft, (float)r.fBottom});
regionVertices.push_back(Vertex{(float)r.fRight, (float)r.fBottom});
it.next();
}
setupStencilQuads(regionVertices, 0);
}
void BakedOpRenderer::prepareRender(const Rect* dirtyBounds, const ClipBase* clip) {
// Prepare scissor (done before stencil, to simplify filling stencil)
mRenderState.scissor().setEnabled(clip != nullptr);
if (clip) {
mRenderState.scissor().set(mRenderTarget.viewportHeight, clip->rect);
}
// If stencil may be used for clipping, enable it, fill it, or disable it as appropriate
if (CC_LIKELY(!Properties::debugOverdraw)) {
// only modify stencil mode and content when it's not used for overdraw visualization
if (CC_UNLIKELY(clip && clip->mode != ClipMode::Rectangle)) {
// NOTE: this pointer check is only safe for non-rect clips,
// since rect clips may be created on the stack
if (mRenderTarget.lastStencilClip != clip) {
// Stencil needed, but current stencil isn't up to date
mRenderTarget.lastStencilClip = clip;
if (mRenderTarget.frameBufferId != 0 && !mRenderTarget.stencil) {
OffscreenBuffer* layer = mRenderTarget.offscreenBuffer;
mRenderTarget.stencil = mCaches.renderBufferCache.get(
Stencil::getLayerStencilFormat(),
layer->texture.width(), layer->texture.height());
// stencil is bound + allocated - associate it with current FBO
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, mRenderTarget.stencil->getName());
}
if (clip->mode == ClipMode::RectangleList) {
setupStencilRectList(clip);
} else {
setupStencilRegion(clip);
}
} else {
// stencil is up to date - just need to ensure it's enabled (since an unclipped
// or scissor-only clipped op may have been drawn, disabling the stencil)
int incrementThreshold = 0;
if (CC_LIKELY(clip->mode == ClipMode::RectangleList)) {
auto&& rectList = reinterpret_cast<const ClipRectList*>(clip)->rectList;
incrementThreshold = rectList.getTransformedRectanglesCount();
}
mRenderState.stencil().enableTest(incrementThreshold);
}
} else {
// either scissor or no clip, so disable stencil test
mRenderState.stencil().disable();
}
}
if (dirtyBounds) {
// dirty offscreenbuffer if present
dirtyRenderTarget(*dirtyBounds);
}
}
void BakedOpRenderer::renderGlopImpl(const Rect* dirtyBounds, const ClipBase* clip,
const Glop& glop) {
prepareRender(dirtyBounds, clip);
mRenderState.render(glop, mRenderTarget.orthoMatrix);
if (!mRenderTarget.frameBufferId) mHasDrawn = true;
}
void BakedOpRenderer::renderFunctor(const FunctorOp& op, const BakedOpState& state) {
prepareRender(&state.computedState.clippedBounds, state.computedState.getClipIfNeeded());
DrawGlInfo info;
auto&& clip = state.computedState.clipRect();
info.clipLeft = clip.left;
info.clipTop = clip.top;
info.clipRight = clip.right;
info.clipBottom = clip.bottom;
info.isLayer = offscreenRenderTarget();
info.width = mRenderTarget.viewportWidth;
info.height = mRenderTarget.viewportHeight;
state.computedState.transform.copyTo(&info.transform[0]);
mRenderState.invokeFunctor(op.functor, DrawGlInfo::kModeDraw, &info);
}
void BakedOpRenderer::dirtyRenderTarget(const Rect& uiDirty) {
if (mRenderTarget.offscreenBuffer) {
mRenderTarget.offscreenBuffer->dirty(uiDirty);
}
}
} // namespace uirenderer
} // namespace android