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/*
* Copyright (C) 2010 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.
*/
#define LOG_TAG "PointerController"
//#define LOG_NDEBUG 0
// Log debug messages about pointer updates
#define DEBUG_POINTER_UPDATES 0
#include "PointerController.h"
#include <cutils/log.h>
#include <SkBitmap.h>
#include <SkCanvas.h>
#include <SkColor.h>
#include <SkPaint.h>
#include <SkXfermode.h>
namespace android {
// --- PointerController ---
PointerController::PointerController(int32_t pointerLayer) :
mPointerLayer(pointerLayer) {
AutoMutex _l(mLock);
mLocked.displayWidth = -1;
mLocked.displayHeight = -1;
mLocked.displayOrientation = DISPLAY_ORIENTATION_0;
mLocked.pointerX = 0;
mLocked.pointerY = 0;
mLocked.buttonState = 0;
mLocked.iconBitmap = NULL;
mLocked.iconHotSpotX = 0;
mLocked.iconHotSpotY = 0;
mLocked.wantVisible = false;
mLocked.visible = false;
mLocked.drawn = false;
}
PointerController::~PointerController() {
if (mSurfaceControl != NULL) {
mSurfaceControl->clear();
mSurfaceControl.clear();
}
if (mSurfaceComposerClient != NULL) {
mSurfaceComposerClient->dispose();
mSurfaceComposerClient.clear();
}
delete mLocked.iconBitmap;
}
bool PointerController::getBounds(float* outMinX, float* outMinY,
float* outMaxX, float* outMaxY) const {
AutoMutex _l(mLock);
return getBoundsLocked(outMinX, outMinY, outMaxX, outMaxY);
}
bool PointerController::getBoundsLocked(float* outMinX, float* outMinY,
float* outMaxX, float* outMaxY) const {
if (mLocked.displayWidth <= 0 || mLocked.displayHeight <= 0) {
return false;
}
*outMinX = 0;
*outMinY = 0;
switch (mLocked.displayOrientation) {
case DISPLAY_ORIENTATION_90:
case DISPLAY_ORIENTATION_270:
*outMaxX = mLocked.displayHeight;
*outMaxY = mLocked.displayWidth;
break;
default:
*outMaxX = mLocked.displayWidth;
*outMaxY = mLocked.displayHeight;
break;
}
return true;
}
void PointerController::move(float deltaX, float deltaY) {
#if DEBUG_POINTER_UPDATES
LOGD("Move pointer by deltaX=%0.3f, deltaY=%0.3f", deltaX, deltaY);
#endif
if (deltaX == 0.0f && deltaY == 0.0f) {
return;
}
AutoMutex _l(mLock);
setPositionLocked(mLocked.pointerX + deltaX, mLocked.pointerY + deltaY);
}
void PointerController::setButtonState(uint32_t buttonState) {
#if DEBUG_POINTER_UPDATES
LOGD("Set button state 0x%08x", buttonState);
#endif
AutoMutex _l(mLock);
if (mLocked.buttonState != buttonState) {
mLocked.buttonState = buttonState;
mLocked.wantVisible = true;
updateLocked();
}
}
uint32_t PointerController::getButtonState() const {
AutoMutex _l(mLock);
return mLocked.buttonState;
}
void PointerController::setPosition(float x, float y) {
#if DEBUG_POINTER_UPDATES
LOGD("Set pointer position to x=%0.3f, y=%0.3f", x, y);
#endif
AutoMutex _l(mLock);
setPositionLocked(x, y);
}
void PointerController::setPositionLocked(float x, float y) {
float minX, minY, maxX, maxY;
if (getBoundsLocked(&minX, &minY, &maxX, &maxY)) {
if (x <= minX) {
mLocked.pointerX = minX;
} else if (x >= maxX) {
mLocked.pointerX = maxX;
} else {
mLocked.pointerX = x;
}
if (y <= minY) {
mLocked.pointerY = minY;
} else if (y >= maxY) {
mLocked.pointerY = maxY;
} else {
mLocked.pointerY = y;
}
mLocked.wantVisible = true;
updateLocked();
}
}
void PointerController::getPosition(float* outX, float* outY) const {
AutoMutex _l(mLock);
*outX = mLocked.pointerX;
*outY = mLocked.pointerY;
}
void PointerController::updateLocked() {
bool wantVisibleAndHavePointerIcon = mLocked.wantVisible && mLocked.iconBitmap;
if (wantVisibleAndHavePointerIcon) {
// Want the pointer to be visible.
// Ensure the surface is created and drawn.
if (!createSurfaceIfNeededLocked() || !drawPointerIfNeededLocked()) {
return;
}
} else {
// Don't want the pointer to be visible.
// If it is not visible then we are done.
if (mSurfaceControl == NULL || !mLocked.visible) {
return;
}
}
status_t status = mSurfaceComposerClient->openTransaction();
if (status) {
LOGE("Error opening surface transaction to update pointer surface.");
return;
}
if (wantVisibleAndHavePointerIcon) {
status = mSurfaceControl->setPosition(
mLocked.pointerX - mLocked.iconHotSpotX,
mLocked.pointerY - mLocked.iconHotSpotY);
if (status) {
LOGE("Error %d moving pointer surface.", status);
goto CloseTransaction;
}
if (!mLocked.visible) {
status = mSurfaceControl->setLayer(mPointerLayer);
if (status) {
LOGE("Error %d setting pointer surface layer.", status);
goto CloseTransaction;
}
status = mSurfaceControl->show(mPointerLayer);
if (status) {
LOGE("Error %d showing pointer surface.", status);
goto CloseTransaction;
}
mLocked.visible = true;
}
} else {
if (mLocked.visible) {
status = mSurfaceControl->hide();
if (status) {
LOGE("Error %d hiding pointer surface.", status);
goto CloseTransaction;
}
mLocked.visible = false;
}
}
CloseTransaction:
status = mSurfaceComposerClient->closeTransaction();
if (status) {
LOGE("Error closing surface transaction to update pointer surface.");
}
}
void PointerController::setDisplaySize(int32_t width, int32_t height) {
AutoMutex _l(mLock);
if (mLocked.displayWidth != width || mLocked.displayHeight != height) {
mLocked.displayWidth = width;
mLocked.displayHeight = height;
float minX, minY, maxX, maxY;
if (getBoundsLocked(&minX, &minY, &maxX, &maxY)) {
mLocked.pointerX = (minX + maxX) * 0.5f;
mLocked.pointerY = (minY + maxY) * 0.5f;
} else {
mLocked.pointerX = 0;
mLocked.pointerY = 0;
}
updateLocked();
}
}
void PointerController::setDisplayOrientation(int32_t orientation) {
AutoMutex _l(mLock);
if (mLocked.displayOrientation != orientation) {
float absoluteX, absoluteY;
// Map from oriented display coordinates to absolute display coordinates.
switch (mLocked.displayOrientation) {
case DISPLAY_ORIENTATION_90:
absoluteX = mLocked.displayWidth - mLocked.pointerY;
absoluteY = mLocked.pointerX;
break;
case DISPLAY_ORIENTATION_180:
absoluteX = mLocked.displayWidth - mLocked.pointerX;
absoluteY = mLocked.displayHeight - mLocked.pointerY;
break;
case DISPLAY_ORIENTATION_270:
absoluteX = mLocked.pointerY;
absoluteY = mLocked.displayHeight - mLocked.pointerX;
break;
default:
absoluteX = mLocked.pointerX;
absoluteY = mLocked.pointerY;
break;
}
// Map from absolute display coordinates to oriented display coordinates.
switch (orientation) {
case DISPLAY_ORIENTATION_90:
mLocked.pointerX = absoluteY;
mLocked.pointerY = mLocked.displayWidth - absoluteX;
break;
case DISPLAY_ORIENTATION_180:
mLocked.pointerX = mLocked.displayWidth - absoluteX;
mLocked.pointerY = mLocked.displayHeight - absoluteY;
break;
case DISPLAY_ORIENTATION_270:
mLocked.pointerX = mLocked.displayHeight - absoluteY;
mLocked.pointerY = absoluteX;
break;
default:
mLocked.pointerX = absoluteX;
mLocked.pointerY = absoluteY;
break;
}
mLocked.displayOrientation = orientation;
updateLocked();
}
}
void PointerController::setPointerIcon(const SkBitmap* bitmap, float hotSpotX, float hotSpotY) {
AutoMutex _l(mLock);
delete mLocked.iconBitmap;
mLocked.iconBitmap = bitmap ? new SkBitmap(*bitmap) : NULL;
mLocked.iconHotSpotX = hotSpotX;
mLocked.iconHotSpotY = hotSpotY;
mLocked.drawn = false;
}
bool PointerController::createSurfaceIfNeededLocked() {
if (!mLocked.iconBitmap) {
// If we don't have a pointer icon, then no point allocating a surface now.
return false;
}
if (mSurfaceComposerClient == NULL) {
mSurfaceComposerClient = new SurfaceComposerClient();
}
if (mSurfaceControl == NULL) {
mSurfaceControl = mSurfaceComposerClient->createSurface(getpid(),
String8("Pointer Icon"), 0,
mLocked.iconBitmap->width(), mLocked.iconBitmap->height(),
PIXEL_FORMAT_RGBA_8888);
if (mSurfaceControl == NULL) {
LOGE("Error creating pointer surface.");
return false;
}
}
return true;
}
bool PointerController::drawPointerIfNeededLocked() {
if (!mLocked.drawn) {
if (!mLocked.iconBitmap) {
return false;
}
if (!resizeSurfaceLocked(mLocked.iconBitmap->width(), mLocked.iconBitmap->height())) {
return false;
}
sp<Surface> surface = mSurfaceControl->getSurface();
Surface::SurfaceInfo surfaceInfo;
status_t status = surface->lock(&surfaceInfo);
if (status) {
LOGE("Error %d locking pointer surface before drawing.", status);
return false;
}
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(*mLocked.iconBitmap, 0, 0, &paint);
status = surface->unlockAndPost();
if (status) {
LOGE("Error %d unlocking pointer surface after drawing.", status);
return false;
}
}
mLocked.drawn = true;
return true;
}
bool PointerController::resizeSurfaceLocked(int32_t width, int32_t height) {
status_t status = mSurfaceComposerClient->openTransaction();
if (status) {
LOGE("Error opening surface transaction to resize pointer surface.");
return false;
}
status = mSurfaceControl->setSize(width, height);
if (status) {
LOGE("Error %d setting pointer surface size.", status);
return false;
}
status = mSurfaceComposerClient->closeTransaction();
if (status) {
LOGE("Error closing surface transaction to resize pointer surface.");
return false;
}
return true;
}
} // namespace android
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