replicant-frameworks_native/services/surfaceflinger/LayerBase.cpp

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/*
* Copyright (C) 2007 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 <stdlib.h>
#include <stdint.h>
#include <sys/types.h>
#include <utils/Errors.h>
#include <utils/Log.h>
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#include <binder/IPCThreadState.h>
#include <binder/IServiceManager.h>
#include <GLES/gl.h>
#include <GLES/glext.h>
#include <hardware/hardware.h>
#include "clz.h"
#include "Client.h"
#include "LayerBase.h"
#include "Layer.h"
#include "SurfaceFlinger.h"
#include "DisplayDevice.h"
namespace android {
// ---------------------------------------------------------------------------
int32_t LayerBase::sSequence = 1;
LayerBase::LayerBase(SurfaceFlinger* flinger, DisplayID display)
: dpy(display), contentDirty(false),
sequence(uint32_t(android_atomic_inc(&sSequence))),
mFlinger(flinger), mFiltering(false),
mNeedsFiltering(false),
mTransactionFlags(0),
mPremultipliedAlpha(true), mName("unnamed"), mDebug(false)
{
}
LayerBase::~LayerBase()
{
}
void LayerBase::setName(const String8& name) {
mName = name;
}
String8 LayerBase::getName() const {
return mName;
}
void LayerBase::initStates(uint32_t w, uint32_t h, uint32_t flags)
{
uint32_t layerFlags = 0;
if (flags & ISurfaceComposerClient::eHidden)
layerFlags = layer_state_t::eLayerHidden;
if (flags & ISurfaceComposerClient::eNonPremultiplied)
mPremultipliedAlpha = false;
mCurrentState.active.w = w;
mCurrentState.active.h = h;
mCurrentState.active.crop.makeInvalid();
mCurrentState.z = 0;
mCurrentState.alpha = 0xFF;
mCurrentState.layerStack = 0;
mCurrentState.flags = layerFlags;
mCurrentState.sequence = 0;
mCurrentState.transform.set(0, 0);
mCurrentState.requested = mCurrentState.active;
// drawing state & current state are identical
mDrawingState = mCurrentState;
}
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void LayerBase::commitTransaction() {
mDrawingState = mCurrentState;
}
void LayerBase::forceVisibilityTransaction() {
// this can be called without SurfaceFlinger.mStateLock, but if we
// can atomically increment the sequence number, it doesn't matter.
android_atomic_inc(&mCurrentState.sequence);
requestTransaction();
}
bool LayerBase::requestTransaction() {
int32_t old = setTransactionFlags(eTransactionNeeded);
return ((old & eTransactionNeeded) == 0);
}
uint32_t LayerBase::getTransactionFlags(uint32_t flags) {
return android_atomic_and(~flags, &mTransactionFlags) & flags;
}
uint32_t LayerBase::setTransactionFlags(uint32_t flags) {
return android_atomic_or(flags, &mTransactionFlags);
}
bool LayerBase::setPosition(float x, float y) {
if (mCurrentState.transform.tx() == x && mCurrentState.transform.ty() == y)
return false;
mCurrentState.sequence++;
mCurrentState.transform.set(x, y);
requestTransaction();
return true;
}
bool LayerBase::setLayer(uint32_t z) {
if (mCurrentState.z == z)
return false;
mCurrentState.sequence++;
mCurrentState.z = z;
requestTransaction();
return true;
}
bool LayerBase::setSize(uint32_t w, uint32_t h) {
if (mCurrentState.requested.w == w && mCurrentState.requested.h == h)
return false;
mCurrentState.requested.w = w;
mCurrentState.requested.h = h;
requestTransaction();
return true;
}
bool LayerBase::setAlpha(uint8_t alpha) {
if (mCurrentState.alpha == alpha)
return false;
mCurrentState.sequence++;
mCurrentState.alpha = alpha;
requestTransaction();
return true;
}
bool LayerBase::setMatrix(const layer_state_t::matrix22_t& matrix) {
mCurrentState.sequence++;
mCurrentState.transform.set(
matrix.dsdx, matrix.dsdy, matrix.dtdx, matrix.dtdy);
requestTransaction();
return true;
}
bool LayerBase::setTransparentRegionHint(const Region& transparent) {
mCurrentState.sequence++;
mCurrentState.transparentRegion = transparent;
requestTransaction();
return true;
}
bool LayerBase::setFlags(uint8_t flags, uint8_t mask) {
const uint32_t newFlags = (mCurrentState.flags & ~mask) | (flags & mask);
if (mCurrentState.flags == newFlags)
return false;
mCurrentState.sequence++;
mCurrentState.flags = newFlags;
requestTransaction();
return true;
}
bool LayerBase::setCrop(const Rect& crop) {
if (mCurrentState.requested.crop == crop)
return false;
mCurrentState.sequence++;
mCurrentState.requested.crop = crop;
requestTransaction();
return true;
}
bool LayerBase::setLayerStack(uint32_t layerStack) {
if (mCurrentState.layerStack == layerStack)
return false;
mCurrentState.sequence++;
mCurrentState.layerStack = layerStack;
requestTransaction();
return true;
}
void LayerBase::setVisibleRegion(const Region& visibleRegion) {
// always called from main thread
this->visibleRegion = visibleRegion;
}
void LayerBase::setCoveredRegion(const Region& coveredRegion) {
// always called from main thread
this->coveredRegion = coveredRegion;
}
uint32_t LayerBase::doTransaction(uint32_t flags)
{
const Layer::State& front(drawingState());
const Layer::State& temp(currentState());
// always set active to requested, unless we're asked not to
// this is used by Layer, which special cases resizes.
if (flags & eDontUpdateGeometryState) {
} else {
Layer::State& editTemp(currentState());
editTemp.active = temp.requested;
}
if (front.active != temp.active) {
// invalidate and recompute the visible regions if needed
flags |= Layer::eVisibleRegion;
}
if (temp.sequence != front.sequence) {
// invalidate and recompute the visible regions if needed
flags |= eVisibleRegion;
this->contentDirty = true;
// we may use linear filtering, if the matrix scales us
const uint8_t type = temp.transform.getType();
mNeedsFiltering = (!temp.transform.preserveRects() ||
(type >= Transform::SCALE));
}
// Commit the transaction
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commitTransaction();
return flags;
}
void LayerBase::computeGeometry(const sp<const DisplayDevice>& hw, LayerMesh* mesh) const
{
const Layer::State& s(drawingState());
const Transform tr(hw->getTransform() * s.transform);
const uint32_t hw_h = hw->getHeight();
const Rect& crop(s.active.crop);
Rect win(s.active.w, s.active.h);
if (!crop.isEmpty()) {
win.intersect(crop, &win);
}
if (mesh) {
tr.transform(mesh->mVertices[0], win.left, win.top);
tr.transform(mesh->mVertices[1], win.left, win.bottom);
tr.transform(mesh->mVertices[2], win.right, win.bottom);
tr.transform(mesh->mVertices[3], win.right, win.top);
for (size_t i=0 ; i<4 ; i++) {
mesh->mVertices[i][1] = hw_h - mesh->mVertices[i][1];
}
}
}
Rect LayerBase::computeBounds() const {
const Layer::State& s(drawingState());
const Rect& crop(s.active.crop);
Rect win(s.active.w, s.active.h);
if (!crop.isEmpty()) {
win.intersect(crop, &win);
}
return s.transform.transform(win);
}
Region LayerBase::latchBuffer(bool& recomputeVisibleRegions) {
Region result;
return result;
}
void LayerBase::setGeometry(
const sp<const DisplayDevice>& hw,
HWComposer::HWCLayerInterface& layer)
{
layer.setDefaultState();
// this gives us only the "orientation" component of the transform
const State& s(drawingState());
const uint32_t finalTransform = s.transform.getOrientation();
// we can only handle simple transformation
if (finalTransform & Transform::ROT_INVALID) {
layer.setTransform(0);
} else {
layer.setTransform(finalTransform);
}
if (!isOpaque()) {
layer.setBlending(mPremultipliedAlpha ?
HWC_BLENDING_PREMULT :
HWC_BLENDING_COVERAGE);
}
const Transform& tr = hw->getTransform();
Rect transformedBounds(computeBounds());
transformedBounds = tr.transform(transformedBounds);
// scaling is already applied in transformedBounds
layer.setFrame(transformedBounds);
layer.setCrop(transformedBounds.getBounds());
layer.setVisibleRegionScreen(tr.transform(visibleRegion));
}
void LayerBase::setPerFrameData(const sp<const DisplayDevice>& hw,
HWComposer::HWCLayerInterface& layer) {
layer.setBuffer(0);
}
void LayerBase::setAcquireFence(const sp<const DisplayDevice>& hw,
HWComposer::HWCLayerInterface& layer) {
layer.setAcquireFenceFd(-1);
}
void LayerBase::setFiltering(bool filtering)
{
mFiltering = filtering;
}
bool LayerBase::getFiltering() const
{
return mFiltering;
}
void LayerBase::draw(const sp<const DisplayDevice>& hw, const Region& clip) const
{
onDraw(hw, clip);
}
void LayerBase::draw(const sp<const DisplayDevice>& hw)
{
onDraw( hw, Region(hw->bounds()) );
}
void LayerBase::clearWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip,
GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha) const
{
const uint32_t fbHeight = hw->getHeight();
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glColor4f(red,green,blue,alpha);
glDisable(GL_TEXTURE_EXTERNAL_OES);
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
LayerMesh mesh;
computeGeometry(hw, &mesh);
glVertexPointer(2, GL_FLOAT, 0, mesh.getVertices());
glDrawArrays(GL_TRIANGLE_FAN, 0, mesh.getVertexCount());
}
void LayerBase::clearWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip) const
{
clearWithOpenGL(hw, clip, 0,0,0,0);
}
void LayerBase::drawWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip) const
{
const uint32_t fbHeight = hw->getHeight();
const State& s(drawingState());
GLenum src = mPremultipliedAlpha ? GL_ONE : GL_SRC_ALPHA;
if (CC_UNLIKELY(s.alpha < 0xFF)) {
const GLfloat alpha = s.alpha * (1.0f/255.0f);
if (mPremultipliedAlpha) {
glColor4f(alpha, alpha, alpha, alpha);
} else {
glColor4f(1, 1, 1, alpha);
}
glEnable(GL_BLEND);
glBlendFunc(src, GL_ONE_MINUS_SRC_ALPHA);
glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
} else {
glColor4f(1, 1, 1, 1);
glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
if (!isOpaque()) {
glEnable(GL_BLEND);
glBlendFunc(src, GL_ONE_MINUS_SRC_ALPHA);
} else {
glDisable(GL_BLEND);
}
}
LayerMesh mesh;
computeGeometry(hw, &mesh);
// TODO: we probably want to generate the texture coords with the mesh
// here we assume that we only have 4 vertices
struct TexCoords {
GLfloat u;
GLfloat v;
};
Rect crop(s.active.w, s.active.h);
if (!s.active.crop.isEmpty()) {
crop = s.active.crop;
}
GLfloat left = GLfloat(crop.left) / GLfloat(s.active.w);
GLfloat top = GLfloat(crop.top) / GLfloat(s.active.h);
GLfloat right = GLfloat(crop.right) / GLfloat(s.active.w);
GLfloat bottom = GLfloat(crop.bottom) / GLfloat(s.active.h);
TexCoords texCoords[4];
texCoords[0].u = left;
texCoords[0].v = top;
texCoords[1].u = left;
texCoords[1].v = bottom;
texCoords[2].u = right;
texCoords[2].v = bottom;
texCoords[3].u = right;
texCoords[3].v = top;
for (int i = 0; i < 4; i++) {
texCoords[i].v = 1.0f - texCoords[i].v;
}
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
glVertexPointer(2, GL_FLOAT, 0, mesh.getVertices());
glDrawArrays(GL_TRIANGLE_FAN, 0, mesh.getVertexCount());
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisable(GL_BLEND);
}
void LayerBase::dump(String8& result, char* buffer, size_t SIZE) const
{
const Layer::State& s(drawingState());
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snprintf(buffer, SIZE,
"+ %s %p (%s)\n",
getTypeId(), this, getName().string());
result.append(buffer);
s.transparentRegion.dump(result, "transparentRegion");
visibleRegion.dump(result, "visibleRegion");
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snprintf(buffer, SIZE,
" "
"layerStack=%4d, z=%9d, pos=(%g,%g), size=(%4d,%4d), crop=(%4d,%4d,%4d,%4d), "
"isOpaque=%1d, needsDithering=%1d, invalidate=%1d, "
"alpha=0x%02x, flags=0x%08x, tr=[%.2f, %.2f][%.2f, %.2f]\n",
s.z, s.layerStack, s.transform.tx(), s.transform.ty(), s.active.w, s.active.h,
s.active.crop.left, s.active.crop.top,
s.active.crop.right, s.active.crop.bottom,
isOpaque(), needsDithering(), contentDirty,
s.alpha, s.flags,
s.transform[0][0], s.transform[0][1],
s.transform[1][0], s.transform[1][1]);
result.append(buffer);
}
void LayerBase::shortDump(String8& result, char* scratch, size_t size) const {
LayerBase::dump(result, scratch, size);
}
void LayerBase::dumpStats(String8& result, char* scratch, size_t SIZE) const {
}
void LayerBase::clearStats() {
}
sp<LayerBaseClient> LayerBase::getLayerBaseClient() const {
return 0;
}
sp<Layer> LayerBase::getLayer() const {
return 0;
}
// ---------------------------------------------------------------------------
int32_t LayerBaseClient::sIdentity = 1;
LayerBaseClient::LayerBaseClient(SurfaceFlinger* flinger, DisplayID display,
const sp<Client>& client)
: LayerBase(flinger, display),
mHasSurface(false),
mClientRef(client),
mIdentity(uint32_t(android_atomic_inc(&sIdentity)))
{
}
LayerBaseClient::~LayerBaseClient()
{
sp<Client> c(mClientRef.promote());
if (c != 0) {
c->detachLayer(this);
}
}
sp<ISurface> LayerBaseClient::createSurface()
{
class BSurface : public BnSurface, public LayerCleaner {
virtual sp<ISurfaceTexture> getSurfaceTexture() const { return 0; }
public:
BSurface(const sp<SurfaceFlinger>& flinger,
const sp<LayerBaseClient>& layer)
: LayerCleaner(flinger, layer) { }
};
sp<ISurface> sur(new BSurface(mFlinger, this));
return sur;
}
sp<ISurface> LayerBaseClient::getSurface()
{
sp<ISurface> s;
Mutex::Autolock _l(mLock);
LOG_ALWAYS_FATAL_IF(mHasSurface,
"LayerBaseClient::getSurface() has already been called");
mHasSurface = true;
s = createSurface();
mClientSurfaceBinder = s->asBinder();
return s;
}
wp<IBinder> LayerBaseClient::getSurfaceBinder() const {
return mClientSurfaceBinder;
}
wp<IBinder> LayerBaseClient::getSurfaceTextureBinder() const {
return 0;
}
void LayerBaseClient::dump(String8& result, char* buffer, size_t SIZE) const
{
LayerBase::dump(result, buffer, SIZE);
sp<Client> client(mClientRef.promote());
snprintf(buffer, SIZE,
" client=%p, identity=%u\n",
client.get(), getIdentity());
result.append(buffer);
}
void LayerBaseClient::shortDump(String8& result, char* scratch, size_t size) const
{
LayerBaseClient::dump(result, scratch, size);
}
// ---------------------------------------------------------------------------
LayerBaseClient::LayerCleaner::LayerCleaner(const sp<SurfaceFlinger>& flinger,
const sp<LayerBaseClient>& layer)
: mFlinger(flinger), mLayer(layer) {
}
LayerBaseClient::LayerCleaner::~LayerCleaner() {
// destroy client resources
mFlinger->onLayerDestroyed(mLayer);
}
// ---------------------------------------------------------------------------
}; // namespace android