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replicant-frameworks_native/libs/gui/SurfaceTexture.cpp
Jamie Gennis 1b20cde313 Pass the IGraphicBufferAlloc to SurfaceTextureClient. 
This change passes a reference to the IGraphicBufferAlloc binder object
to SurfaceTextureClient objects.  When STC objects are created they
query their associated ISurfaceTexture object for the
IGraphicBufferAlloc that the SurfaceTexture uses to allocate buffers.
Having the SurfaceTextureClient hold this reference prevents the
GraphicBufferAlloc in SurfaceFlinger from freeing the allocated buffers
before the SurfaceTextureClient is done with them.

Change-Id: Ib8e30e8b37fdd60438cbb4cb7e9174d0ba6d661c
related-bug: 3362519
2011-02-02 15:31:47 -08:00

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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 "SurfaceTexture"
//#define LOG_NDEBUG 0
#define GL_GLEXT_PROTOTYPES
#define EGL_EGLEXT_PROTOTYPES
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <gui/SurfaceTexture.h>
#include <surfaceflinger/ISurfaceComposer.h>
#include <surfaceflinger/SurfaceComposerClient.h>
#include <surfaceflinger/IGraphicBufferAlloc.h>
#include <utils/Log.h>
namespace android {
// Transform matrices
static float mtxIdentity[16] = {
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1,
};
static float mtxFlipH[16] = {
-1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
1, 0, 0, 1,
};
static float mtxFlipV[16] = {
1, 0, 0, 0,
0, -1, 0, 0,
0, 0, 1, 0,
0, 1, 0, 1,
};
static float mtxRot90[16] = {
0, 1, 0, 0,
-1, 0, 0, 0,
0, 0, 1, 0,
1, 0, 0, 1,
};
static float mtxRot180[16] = {
-1, 0, 0, 0,
0, -1, 0, 0,
0, 0, 1, 0,
1, 1, 0, 1,
};
static float mtxRot270[16] = {
0, -1, 0, 0,
1, 0, 0, 0,
0, 0, 1, 0,
0, 1, 0, 1,
};
static void mtxMul(float out[16], const float a[16], const float b[16]);
SurfaceTexture::SurfaceTexture(GLuint tex) :
mBufferCount(MIN_BUFFER_SLOTS), mCurrentTexture(INVALID_BUFFER_SLOT),
mLastQueued(INVALID_BUFFER_SLOT), mTexName(tex) {
LOGV("SurfaceTexture::SurfaceTexture");
for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
mSlots[i].mEglImage = EGL_NO_IMAGE_KHR;
mSlots[i].mEglDisplay = EGL_NO_DISPLAY;
mSlots[i].mOwnedByClient = false;
}
sp<ISurfaceComposer> composer(ComposerService::getComposerService());
mGraphicBufferAlloc = composer->createGraphicBufferAlloc();
}
SurfaceTexture::~SurfaceTexture() {
LOGV("SurfaceTexture::~SurfaceTexture");
freeAllBuffers();
}
status_t SurfaceTexture::setBufferCount(int bufferCount) {
LOGV("SurfaceTexture::setBufferCount");
Mutex::Autolock lock(mMutex);
freeAllBuffers();
mBufferCount = bufferCount;
mCurrentTexture = INVALID_BUFFER_SLOT;
mLastQueued = INVALID_BUFFER_SLOT;
return OK;
}
sp<GraphicBuffer> SurfaceTexture::requestBuffer(int buf,
uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
LOGV("SurfaceTexture::requestBuffer");
Mutex::Autolock lock(mMutex);
if (buf < 0 || mBufferCount <= buf) {
LOGE("requestBuffer: slot index out of range [0, %d]: %d",
mBufferCount, buf);
return 0;
}
usage |= GraphicBuffer::USAGE_HW_TEXTURE;
sp<GraphicBuffer> graphicBuffer(
mGraphicBufferAlloc->createGraphicBuffer(w, h, format, usage));
if (graphicBuffer == 0) {
LOGE("requestBuffer: SurfaceComposer::createGraphicBuffer failed");
} else {
mSlots[buf].mGraphicBuffer = graphicBuffer;
if (mSlots[buf].mEglImage != EGL_NO_IMAGE_KHR) {
eglDestroyImageKHR(mSlots[buf].mEglDisplay, mSlots[buf].mEglImage);
mSlots[buf].mEglImage = EGL_NO_IMAGE_KHR;
mSlots[buf].mEglDisplay = EGL_NO_DISPLAY;
}
mAllocdBuffers.add(graphicBuffer);
}
return graphicBuffer;
}
status_t SurfaceTexture::dequeueBuffer(int *buf) {
LOGV("SurfaceTexture::dequeueBuffer");
Mutex::Autolock lock(mMutex);
int found = INVALID_BUFFER_SLOT;
for (int i = 0; i < mBufferCount; i++) {
if (!mSlots[i].mOwnedByClient && i != mCurrentTexture && i != mLastQueued) {
mSlots[i].mOwnedByClient = true;
found = i;
break;
}
}
if (found == INVALID_BUFFER_SLOT) {
return -EBUSY;
}
*buf = found;
return OK;
}
status_t SurfaceTexture::queueBuffer(int buf) {
LOGV("SurfaceTexture::queueBuffer");
Mutex::Autolock lock(mMutex);
if (buf < 0 || mBufferCount <= buf) {
LOGE("queueBuffer: slot index out of range [0, %d]: %d",
mBufferCount, buf);
return -EINVAL;
} else if (!mSlots[buf].mOwnedByClient) {
LOGE("queueBuffer: slot %d is not owned by the client", buf);
return -EINVAL;
} else if (mSlots[buf].mGraphicBuffer == 0) {
LOGE("queueBuffer: slot %d was enqueued without requesting a buffer",
buf);
return -EINVAL;
}
mSlots[buf].mOwnedByClient = false;
mLastQueued = buf;
mLastQueuedCrop = mNextCrop;
mLastQueuedTransform = mNextTransform;
if (mFrameAvailableListener != 0) {
mFrameAvailableListener->onFrameAvailable();
}
return OK;
}
void SurfaceTexture::cancelBuffer(int buf) {
LOGV("SurfaceTexture::cancelBuffer");
Mutex::Autolock lock(mMutex);
if (buf < 0 || mBufferCount <= buf) {
LOGE("cancelBuffer: slot index out of range [0, %d]: %d", mBufferCount,
buf);
return;
} else if (!mSlots[buf].mOwnedByClient) {
LOGE("cancelBuffer: slot %d is not owned by the client", buf);
return;
}
mSlots[buf].mOwnedByClient = false;
}
status_t SurfaceTexture::setCrop(const Rect& crop) {
LOGV("SurfaceTexture::setCrop");
Mutex::Autolock lock(mMutex);
mNextCrop = crop;
return OK;
}
status_t SurfaceTexture::setTransform(uint32_t transform) {
LOGV("SurfaceTexture::setTransform");
Mutex::Autolock lock(mMutex);
mNextTransform = transform;
return OK;
}
status_t SurfaceTexture::updateTexImage() {
LOGV("SurfaceTexture::updateTexImage");
Mutex::Autolock lock(mMutex);
// We always bind the texture even if we don't update its contents.
glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTexName);
// Initially both mCurrentTexture and mLastQueued are INVALID_BUFFER_SLOT,
// so this check will fail until a buffer gets queued.
if (mCurrentTexture != mLastQueued) {
// Update the GL texture object.
EGLImageKHR image = mSlots[mLastQueued].mEglImage;
if (image == EGL_NO_IMAGE_KHR) {
EGLDisplay dpy = eglGetCurrentDisplay();
sp<GraphicBuffer> graphicBuffer = mSlots[mLastQueued].mGraphicBuffer;
image = createImage(dpy, graphicBuffer);
mSlots[mLastQueued].mEglImage = image;
mSlots[mLastQueued].mEglDisplay = dpy;
}
glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, (GLeglImageOES)image);
GLint error = glGetError();
if (error != GL_NO_ERROR) {
LOGE("error binding external texture image %p (slot %d): %#04x",
image, mLastQueued, error);
return -EINVAL;
}
// Update the SurfaceTexture state.
mCurrentTexture = mLastQueued;
mCurrentTextureBuf = mSlots[mCurrentTexture].mGraphicBuffer;
mCurrentCrop = mLastQueuedCrop;
mCurrentTransform = mLastQueuedTransform;
}
return OK;
}
void SurfaceTexture::getTransformMatrix(float mtx[16]) {
LOGV("SurfaceTexture::updateTexImage");
Mutex::Autolock lock(mMutex);
float xform[16];
for (int i = 0; i < 16; i++) {
xform[i] = mtxIdentity[i];
}
if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_FLIP_H) {
float result[16];
mtxMul(result, xform, mtxFlipH);
for (int i = 0; i < 16; i++) {
xform[i] = result[i];
}
}
if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_FLIP_V) {
float result[16];
mtxMul(result, xform, mtxFlipV);
for (int i = 0; i < 16; i++) {
xform[i] = result[i];
}
}
if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_ROT_90) {
float result[16];
mtxMul(result, xform, mtxRot90);
for (int i = 0; i < 16; i++) {
xform[i] = result[i];
}
}
sp<GraphicBuffer>& buf(mSlots[mCurrentTexture].mGraphicBuffer);
float tx, ty, sx, sy;
if (!mCurrentCrop.isEmpty()) {
tx = float(mCurrentCrop.left) / float(buf->getWidth());
ty = float(buf->getHeight() - mCurrentCrop.bottom) /
float(buf->getHeight());
sx = float(mCurrentCrop.width()) / float(buf->getWidth());
sy = float(mCurrentCrop.height()) / float(buf->getHeight());
} else {
tx = 0.0f;
ty = 0.0f;
sx = 1.0f;
sy = 1.0f;
}
float crop[16] = {
sx, 0, 0, 0,
0, sy, 0, 0,
0, 0, 1, 0,
sx*tx, sy*ty, 0, 1,
};
float mtxBeforeFlipV[16];
mtxMul(mtxBeforeFlipV, crop, xform);
// SurfaceFlinger expects the top of its window textures to be at a Y
// coordinate of 0, so SurfaceTexture must behave the same way. We don't
// want to expose this to applications, however, so we must add an
// additional vertical flip to the transform after all the other transforms.
mtxMul(mtx, mtxFlipV, mtxBeforeFlipV);
}
void SurfaceTexture::setFrameAvailableListener(
const sp<FrameAvailableListener>& l) {
LOGV("SurfaceTexture::setFrameAvailableListener");
Mutex::Autolock lock(mMutex);
mFrameAvailableListener = l;
}
sp<IBinder> SurfaceTexture::getAllocator() {
LOGV("SurfaceTexture::getAllocator");
return mGraphicBufferAlloc->asBinder();
}
void SurfaceTexture::freeAllBuffers() {
for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
mSlots[i].mGraphicBuffer = 0;
mSlots[i].mOwnedByClient = false;
if (mSlots[i].mEglImage != EGL_NO_IMAGE_KHR) {
eglDestroyImageKHR(mSlots[i].mEglDisplay, mSlots[i].mEglImage);
mSlots[i].mEglImage = EGL_NO_IMAGE_KHR;
mSlots[i].mEglDisplay = EGL_NO_DISPLAY;
}
}
int exceptBuf = -1;
for (size_t i = 0; i < mAllocdBuffers.size(); i++) {
if (mAllocdBuffers[i] == mCurrentTextureBuf) {
exceptBuf = i;
break;
}
}
mAllocdBuffers.clear();
if (exceptBuf >= 0) {
mAllocdBuffers.add(mCurrentTextureBuf);
}
mGraphicBufferAlloc->freeAllGraphicBuffersExcept(exceptBuf);
}
EGLImageKHR SurfaceTexture::createImage(EGLDisplay dpy,
const sp<GraphicBuffer>& graphicBuffer) {
EGLClientBuffer cbuf = (EGLClientBuffer)graphicBuffer->getNativeBuffer();
EGLint attrs[] = {
EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
EGL_NONE,
};
EGLImageKHR image = eglCreateImageKHR(dpy, EGL_NO_CONTEXT,
EGL_NATIVE_BUFFER_ANDROID, cbuf, attrs);
EGLint error = eglGetError();
if (error != EGL_SUCCESS) {
LOGE("error creating EGLImage: %#x", error);
} else if (image == EGL_NO_IMAGE_KHR) {
LOGE("no error reported, but no image was returned by "
"eglCreateImageKHR");
}
return image;
}
static void mtxMul(float out[16], const float a[16], const float b[16]) {
out[0] = a[0]*b[0] + a[4]*b[1] + a[8]*b[2] + a[12]*b[3];
out[1] = a[1]*b[0] + a[5]*b[1] + a[9]*b[2] + a[13]*b[3];
out[2] = a[2]*b[0] + a[6]*b[1] + a[10]*b[2] + a[14]*b[3];
out[3] = a[3]*b[0] + a[7]*b[1] + a[11]*b[2] + a[15]*b[3];
out[4] = a[0]*b[4] + a[4]*b[5] + a[8]*b[6] + a[12]*b[7];
out[5] = a[1]*b[4] + a[5]*b[5] + a[9]*b[6] + a[13]*b[7];
out[6] = a[2]*b[4] + a[6]*b[5] + a[10]*b[6] + a[14]*b[7];
out[7] = a[3]*b[4] + a[7]*b[5] + a[11]*b[6] + a[15]*b[7];
out[8] = a[0]*b[8] + a[4]*b[9] + a[8]*b[10] + a[12]*b[11];
out[9] = a[1]*b[8] + a[5]*b[9] + a[9]*b[10] + a[13]*b[11];
out[10] = a[2]*b[8] + a[6]*b[9] + a[10]*b[10] + a[14]*b[11];
out[11] = a[3]*b[8] + a[7]*b[9] + a[11]*b[10] + a[15]*b[11];
out[12] = a[0]*b[12] + a[4]*b[13] + a[8]*b[14] + a[12]*b[15];
out[13] = a[1]*b[12] + a[5]*b[13] + a[9]*b[14] + a[13]*b[15];
out[14] = a[2]*b[12] + a[6]*b[13] + a[10]*b[14] + a[14]*b[15];
out[15] = a[3]*b[12] + a[7]*b[13] + a[11]*b[14] + a[15]*b[15];
}
}; // namespace android
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