搞定了android4.0.3的触摸屏的适配后（其实只要驱动没有什么问题，加个配置文件就很容易搞定了），新的任务就下来了，就是要寻找android4.0.3中的鼠标是如何绘画的，哪里createSurface，哪里分配空间的。因为如果是软鼠标的话，在播放视频或者玩大型游戏的时候是很卡的，而走overlay，硬鼠标的话，就显得很灵敏了。艰巨的任务啊，看了我好久还是没有找到鼠标是在哪里绘制的。因为android2.3是在WindowManagerService里面new了一个surface，接着画了几条线而得到的，而android4.0.3中，找了n久还是没有发现，可恶的android4.0.3，网上资料也没有介绍。
期间也添加了android中的power、volumeup、volumedown三个按键，虽然基本功能实现了，但是还是没有搞明白那个长按电源键出来关机和重启等选项是怎么实现的。无聊之余，把KEY的DOWN和UP顺序对调了下，居然有点效果，在此非常疑惑。就是我本来实现的时候，input子系统上报是
input_report_key(&button_dev, KEY_POWER, 1);
input_report_key(&button_dev, KEY_POWER, 0);
这样可以实现电源键的锁屏功能。但当我交换了上报的顺寻后也就是
input_report_key(&button_dev, KEY_POWER, 0);
input_report_key(&button_dev, KEY_POWER, 1);
class Sprite : public RefBase {
protected:
Sprite() { }
virtual ~Sprite() { }
public:
enum {
// The base layer for pointer sprites.
BASE_LAYER_POINTER = 0, // reserve space for 1 pointer
// The base layer for spot sprites.
BASE_LAYER_SPOT = 1, // reserve space for MAX_POINTER_ID spots
};
/* Sets the bitmap that is drawn by the sprite.
* The sprite retains a copy of the bitmap for subsequent rendering. */
virtual void setIcon(const SpriteIcon& icon) = 0;
inline void clearIcon() {
setIcon(SpriteIcon());
}
/* Sets whether the sprite is visible. */
virtual void setVisible(bool visible) = 0;
/* Sets the sprite position on screen, relative to the sprite's hot spot. */
virtual void setPosition(float x, float y) = 0;
/* Sets the layer of the sprite, relative to the system sprite overlay layer.
* Layer 0 is the overlay layer, > 0 appear above this layer. */
virtual void setLayer(int32_t layer) = 0;
/* Sets the sprite alpha blend ratio between 0.0 and 1.0. */
virtual void setAlpha(float alpha) = 0;
/* Sets the sprite transformation matrix. */
virtual void setTransformationMatrix(const SpriteTransformationMatrix& matrix) = 0;
};
/**
* Interface for tracking a mouse / touch pad pointer and touch pad spots.
*
* The spots are sprites on screen that visually represent the positions of
* fingers
*
* The pointer controller is responsible for providing synchronization and for tracking
* display orientation changes if needed.
*/
class PointerControllerInterface : public virtual RefBase {
protected:
PointerControllerInterface() { }
virtual ~PointerControllerInterface() { }
public:
/* Gets the bounds of the region that the pointer can traverse.
* Returns true if the bounds are available. */
virtual bool getBounds(float* outMinX, float* outMinY,
float* outMaxX, float* outMaxY) const = 0;
/* Move the pointer. */
virtual void move(float deltaX, float deltaY) = 0;
/* Sets a mask that indicates which buttons are pressed. */
virtual void setButtonState(int32_t buttonState) = 0;
/* Gets a mask that indicates which buttons are pressed. */
virtual int32_t getButtonState() const = 0;
/* Sets the absolute location of the pointer. */
virtual void setPosition(float x, float y) = 0;
/* Gets the absolute location of the pointer. */
virtual void getPosition(float* outX, float* outY) const = 0;
enum Transition {
// Fade/unfade immediately.
TRANSITION_IMMEDIATE,
// Fade/unfade gradually.
TRANSITION_GRADUAL,
};
/* Fades the pointer out now. */
virtual void fade(Transition transition) = 0;
/* Makes the pointer visible if it has faded out.
* The pointer never unfades itself automatically. This method must be called
* by the client whenever the pointer is moved or a button is pressed and it
* wants to ensure that the pointer becomes visible again. */
virtual void unfade(Transition transition) = 0;
enum Presentation {
// Show the mouse pointer.
PRESENTATION_POINTER,
// Show spots and a spot anchor in place of the mouse pointer.
PRESENTATION_SPOT,
};
/* Sets the mode of the pointer controller. */
virtual void setPresentation(Presentation presentation) = 0;
/* Sets the spots for the current gesture.
* The spots are not subject to the inactivity timeout like the pointer
* itself it since they are expected to remain visible for so long as
* the fingers are on the touch pad.
*
* The values of the AMOTION_EVENT_AXIS_PRESSURE axis is significant.
* For spotCoords, pressure != 0 indicates that the spot's location is being
* pressed (not hovering).
*/
virtual void setSpots(const PointerCoords* spotCoords, const uint32_t* spotIdToIndex,
BitSet32 spotIdBits) = 0;
/* Removes all spots. */
virtual void clearSpots() = 0;
};
/*
* Pointer resources.
*/
struct PointerResources {
SpriteIcon spotHover;
SpriteIcon spotTouch;
SpriteIcon spotAnchor;
};
/*
* Tracks pointer movements and draws the pointer sprite to a surface.
*
* Handles pointer acceleration and animation.
*/
class PointerController : public PointerControllerInterface, public MessageHandler
好了，发泄好了，而在Sprite中，最重要的就是SpriteController::doUpdateSprites()这个函数了，这里就是鼠标绘制和移动后更新的全过程了。
void SpriteController::doUpdateSprites() {
// Collect information about sprite updates.
// Each sprite update record includes a reference to its associated sprite so we can
// be certain the sprites will not be deleted while this function runs. Sprites
// may invalidate themselves again during this time but we will handle those changes
// in the next iteration.
Vector<SpriteUpdate> updates;
size_t numSprites;
{ // acquire lock
AutoMutex _l(mLock);
numSprites = mLocked.invalidatedSprites.size();
for (size_t i = 0; i < numSprites; i++) {
const sp<SpriteImpl>& sprite = mLocked.invalidatedSprites.itemAt(i);
updates.push(SpriteUpdate(sprite, sprite->getStateLocked()));
sprite->resetDirtyLocked();
}
mLocked.invalidatedSprites.clear();
} // release lock
// Create missing surfaces.
bool surfaceChanged = false;
for (size_t i = 0; i < numSprites; i++) {
SpriteUpdate& update = updates.editItemAt(i);
if (update.state.surfaceControl == NULL && update.state.wantSurfaceVisible()) {
update.state.surfaceWidth = update.state.icon.bitmap.width();
update.state.surfaceHeight = update.state.icon.bitmap.height();
update.state.surfaceDrawn = false;
update.state.surfaceVisible = false;
update.state.surfaceControl = obtainSurface(
update.state.surfaceWidth, update.state.surfaceHeight);
if (update.state.surfaceControl != NULL) {
update.surfaceChanged = surfaceChanged = true;
}
}
}
// Resize sprites if needed, inside a global transaction.
bool haveGlobalTransaction = false;
for (size_t i = 0; i < numSprites; i++) {
SpriteUpdate& update = updates.editItemAt(i);
if (update.state.surfaceControl != NULL && update.state.wantSurfaceVisible()) {
int32_t desiredWidth = update.state.icon.bitmap.width();
int32_t desiredHeight = update.state.icon.bitmap.height();
if (update.state.surfaceWidth < desiredWidth
|| update.state.surfaceHeight < desiredHeight) {
if (!haveGlobalTransaction) {
SurfaceComposerClient::openGlobalTransaction();
haveGlobalTransaction = true;
}
status_t status = update.state.surfaceControl->setSize(desiredWidth, desiredHeight);
if (status) {
LOGE("Error %d resizing sprite surface from %dx%d to %dx%d",
status, update.state.surfaceWidth, update.state.surfaceHeight,
desiredWidth, desiredHeight);
} else {
update.state.surfaceWidth = desiredWidth;
update.state.surfaceHeight = desiredHeight;
update.state.surfaceDrawn = false;
update.surfaceChanged = surfaceChanged = true;
if (update.state.surfaceVisible) {
status = update.state.surfaceControl->hide();
if (status) {
LOGE("Error %d hiding sprite surface after resize.", status);
} else {
update.state.surfaceVisible = false;
}
}
}
}
}
}
if (haveGlobalTransaction) {
SurfaceComposerClient::closeGlobalTransaction();
}
// Redraw sprites if needed.
for (size_t i = 0; i < numSprites; i++) {
SpriteUpdate& update = updates.editItemAt(i);
if ((update.state.dirty & DIRTY_BITMAP) && update.state.surfaceDrawn) {
update.state.surfaceDrawn = false;
update.surfaceChanged = surfaceChanged = true;
}
if (update.state.surfaceControl != NULL && !update.state.surfaceDrawn
&& update.state.wantSurfaceVisible()) {
sp<Surface> surface = update.state.surfaceControl->getSurface();
Surface::SurfaceInfo surfaceInfo;
status_t status = surface->lock(&surfaceInfo);
if (status) {
LOGE("Error %d locking sprite surface before drawing.", status);
} else {
SkBitmap surfaceBitmap;
ssize_t bpr = surfaceInfo.s * bytesPerPixel(surfaceInfo.format);
surfaceBitmap.setConfig(SkBitmap::kARGB_8888_Config,
surfaceInfo.w, surfaceInfo.h, bpr);
surfaceBitmap.setPixels(surfaceInfo.bits);
SkCanvas surfaceCanvas;
surfaceCanvas.setBitmapDevice(surfaceBitmap);
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
surfaceCanvas.drawBitmap(update.state.icon.bitmap, 0, 0, &paint);
if (surfaceInfo.w > uint32_t(update.state.icon.bitmap.width())) {
paint.setColor(0); // transparent fill color
surfaceCanvas.drawRectCoords(update.state.icon.bitmap.width(), 0,
surfaceInfo.w, update.state.icon.bitmap.height(), paint);
}
if (surfaceInfo.h > uint32_t(update.state.icon.bitmap.height())) {
paint.setColor(0); // transparent fill color
surfaceCanvas.drawRectCoords(0, update.state.icon.bitmap.height(),
surfaceInfo.w, surfaceInfo.h, paint);
}
status = surface->unlockAndPost();
if (status) {
LOGE("Error %d unlocking and posting sprite surface after drawing.", status);
} else {
update.state.surfaceDrawn = true;
update.surfaceChanged = surfaceChanged = true;
}
}
}
}
// Set sprite surface properties and make them visible.
bool haveTransaction = false;
for (size_t i = 0; i < numSprites; i++) {
SpriteUpdate& update = updates.editItemAt(i);
bool wantSurfaceVisibleAndDrawn = update.state.wantSurfaceVisible()
&& update.state.surfaceDrawn;
bool becomingVisible = wantSurfaceVisibleAndDrawn && !update.state.surfaceVisible;
bool becomingHidden = !wantSurfaceVisibleAndDrawn && update.state.surfaceVisible;
if (update.state.surfaceControl != NULL && (becomingVisible || becomingHidden
|| (wantSurfaceVisibleAndDrawn && (update.state.dirty & (DIRTY_ALPHA
| DIRTY_POSITION | DIRTY_TRANSFORMATION_MATRIX | DIRTY_LAYER
| DIRTY_VISIBILITY | DIRTY_HOTSPOT))))) {
status_t status;
if (!haveTransaction) {
SurfaceComposerClient::openGlobalTransaction();
haveTransaction = true;
}
if (wantSurfaceVisibleAndDrawn
&& (becomingVisible || (update.state.dirty & DIRTY_ALPHA))) {
status = update.state.surfaceControl->setAlpha(update.state.alpha);
if (status) {
LOGE("Error %d setting sprite surface alpha.", status);
}
}
if (wantSurfaceVisibleAndDrawn
&& (becomingVisible || (update.state.dirty & (DIRTY_POSITION
| DIRTY_HOTSPOT)))) {
status = update.state.surfaceControl->setPosition(
update.state.positionX - update.state.icon.hotSpotX,
update.state.positionY - update.state.icon.hotSpotY);
if (status) {
LOGE("Error %d setting sprite surface position.", status);
}
}
if (wantSurfaceVisibleAndDrawn
&& (becomingVisible
|| (update.state.dirty & DIRTY_TRANSFORMATION_MATRIX))) {
status = update.state.surfaceControl->setMatrix(
update.state.transformationMatrix.dsdx,
update.state.transformationMatrix.dtdx,
update.state.transformationMatrix.dsdy,
update.state.transformationMatrix.dtdy);
if (status) {
LOGE("Error %d setting sprite surface transformation matrix.", status);
}
}
int32_t surfaceLayer = mOverlayLayer + update.state.layer;
if (wantSurfaceVisibleAndDrawn
&& (becomingVisible || (update.state.dirty & DIRTY_LAYER))) {
status = update.state.surfaceControl->setLayer(surfaceLayer);
if (status) {
LOGE("Error %d setting sprite surface layer.", status);
}
}
if (becomingVisible) {
status = update.state.surfaceControl->show(surfaceLayer);
if (status) {
LOGE("Error %d showing sprite surface.", status);
} else {
update.state.surfaceVisible = true;
update.surfaceChanged = surfaceChanged = true;
}
} else if (becomingHidden) {
status = update.state.surfaceControl->hide();
if (status) {
LOGE("Error %d hiding sprite surface.", status);
} else {
update.state.surfaceVisible = false;
update.surfaceChanged = surfaceChanged = true;
}
}
}
}
if (haveTransaction) {
SurfaceComposerClient::closeGlobalTransaction();
}
// If any surfaces were changed, write back the new surface properties to the sprites.
if (surfaceChanged) { // acquire lock
AutoMutex _l(mLock);
for (size_t i = 0; i < numSprites; i++) {
const SpriteUpdate& update = updates.itemAt(i);
if (update.surfaceChanged) {
update.sprite->setSurfaceLocked(update.state.surfaceControl,
update.state.surfaceWidth, update.state.surfaceHeight,
update.state.surfaceDrawn, update.state.surfaceVisible);
}
}
} // release lock
// Clear the sprite update vector outside the lock. It is very important that
// we do not clear sprite references inside the lock since we could be releasing
// the last remaining reference to the sprite here which would result in the
// sprite being deleted and the lock being reacquired by the sprite destructor
// while already held.
updates.clear();
}
sp<SurfaceControl> SpriteController::obtainSurface(int32_t width, int32_t height) {
ensureSurfaceComposerClient();
sp<SurfaceControl> surfaceControl = mSurfaceComposerClient->createSurface(
String8("Sprite"), 0, width, height, PIXEL_FORMAT_RGBA_8888);
if (surfaceControl == NULL || !surfaceControl->isValid()
|| !surfaceControl->getSurface()->isValid()) {
LOGE("Error creating sprite surface.");
return NULL;
}
return surfaceControl;
}
sp<Surface> surface = update.state.surfaceControl->getSurface();
Surface::SurfaceInfo surfaceInfo;
status_t status = surface->lock(&surfaceInfo);
status_t Surface::lock(SurfaceInfo* other, Region* inOutDirtyRegion) {
ANativeWindow_Buffer outBuffer;
ARect temp;
ARect* inOutDirtyBounds = NULL;
if (inOutDirtyRegion) {
temp = inOutDirtyRegion->getBounds();
inOutDirtyBounds = &temp;
}
status_t err = SurfaceTextureClient::lock(&outBuffer, inOutDirtyBounds);
if (err == NO_ERROR) {
other->w = uint32_t(outBuffer.width);
other->h = uint32_t(outBuffer.height);
other->s = uint32_t(outBuffer.stride);
other->usage = GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN;
other->format = uint32_t(outBuffer.format);
other->bits = outBuffer.bits;
}
if (inOutDirtyRegion) {
inOutDirtyRegion->set( static_cast<Rect const&>(temp) );
}
return err;
}
status_t SurfaceTextureClient::lock(
ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds)
{
if (mLockedBuffer != 0) {
LOGE("Surface::lock failed, already locked");
return INVALID_OPERATION;
}
if (!mConnectedToCpu) {
int err = SurfaceTextureClient::connect(NATIVE_WINDOW_API_CPU);
if (err) {
return err;
}
// we're intending to do software rendering from this point
setUsage(GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
}
ANativeWindowBuffer* out;
status_t err = dequeueBuffer(&out);
LOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
if (err == NO_ERROR) {
sp<GraphicBuffer> backBuffer(GraphicBuffer::getSelf(out));
err = lockBuffer(backBuffer.get());
LOGE_IF(err, "lockBuffer (handle=%p) failed (%s)",
backBuffer->handle, strerror(-err));
if (err == NO_ERROR) {
const Rect bounds(backBuffer->width, backBuffer->height);
Region newDirtyRegion;
if (inOutDirtyBounds) {
newDirtyRegion.set(static_cast<Rect const&>(*inOutDirtyBounds));
newDirtyRegion.andSelf(bounds);
} else {
newDirtyRegion.set(bounds);
}
// figure out if we can copy the frontbuffer back
const sp<GraphicBuffer>& frontBuffer(mPostedBuffer);
const bool canCopyBack = (frontBuffer != 0 &&
backBuffer->width == frontBuffer->width &&
backBuffer->height == frontBuffer->height &&
backBuffer->format == frontBuffer->format);
if (canCopyBack) {
// copy the area that is invalid and not repainted this round
const Region copyback(mOldDirtyRegion.subtract(newDirtyRegion));
if (!copyback.isEmpty())
copyBlt(backBuffer, frontBuffer, copyback);
} else {
// if we can't copy-back anything, modify the user's dirty
// region to make sure they redraw the whole buffer
newDirtyRegion.set(bounds);
}
// keep track of the are of the buffer that is "clean"
// (ie: that will be redrawn)
mOldDirtyRegion = newDirtyRegion;
if (inOutDirtyBounds) {
*inOutDirtyBounds = newDirtyRegion.getBounds();
}
void* vaddr;
status_t res = backBuffer->lock(
GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
newDirtyRegion.bounds(), &vaddr);
LOGW_IF(res, "failed locking buffer (handle = %p)",
backBuffer->handle);
mLockedBuffer = backBuffer;
outBuffer->width = backBuffer->width;
outBuffer->height = backBuffer->height;
outBuffer->stride = backBuffer->stride;
outBuffer->format = backBuffer->format;
outBuffer->bits = vaddr;
}
}
return err;
}
int SurfaceTextureClient::dequeueBuffer(android_native_buffer_t** buffer) {
LOGV("SurfaceTextureClient::dequeueBuffer");
Mutex::Autolock lock(mMutex);
int buf = -1;
status_t result = mSurfaceTexture->dequeueBuffer(&buf, mReqWidth, mReqHeight,
mReqFormat, mReqUsage);
if (result < 0) {
LOGV("dequeueBuffer: ISurfaceTexture::dequeueBuffer(%d, %d, %d, %d)"
"failed: %d", mReqWidth, mReqHeight, mReqFormat, mReqUsage,
result);
return result;
}
sp<GraphicBuffer>& gbuf(mSlots[buf]);
if (result & ISurfaceTexture::RELEASE_ALL_BUFFERS) {
freeAllBuffers();
}
if ((result & ISurfaceTexture::BUFFER_NEEDS_REALLOCATION) || gbuf == 0) {
result = mSurfaceTexture->requestBuffer(buf, &gbuf);
if (result != NO_ERROR) {
LOGE("dequeueBuffer: ISurfaceTexture::requestBuffer failed: %d",
result);
return result;
}
}
*buffer = gbuf.get();
return OK;
}
