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Debug code for detecting all black pixels screenshots

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Bug: 9120292
Change-Id: If60db32524db973bb1f905ba3cb415c2a1cd7e71
This commit is contained in:
Mathias Agopian 2013-07-03 12:34:01 -07:00
parent 06b6aed2f1
commit fee2b463c5
2 changed files with 39 additions and 0 deletions
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36
services/surfaceflinger/SurfaceFlinger.cpp
View File

@ -72,6 +72,12 @@
#define DISPLAY_COUNT 1
/*
* DEBUG_SCREENSHOTS: set to true to check that screenshots are not all
* black pixels.
*/
#define DEBUG_SCREENSHOTS false
EGLAPI const char* eglQueryStringImplementationANDROID(EGLDisplay dpy, EGLint name);
namespace android {
@ -2822,6 +2828,7 @@ status_t SurfaceFlinger::captureScreenImplLocked(
if (buf->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, &vaddr) == NO_ERROR) {
glReadPixels(0, 0, buffer->stride, reqHeight,
GL_RGBA, GL_UNSIGNED_BYTE, vaddr);
checkScreenshot(buf, vaddr, hw, minLayerZ, maxLayerZ);
buf->unlock();
}
}
@ -2856,6 +2863,35 @@ status_t SurfaceFlinger::captureScreenImplLocked(
return result;
}
void SurfaceFlinger::checkScreenshot(const sp<GraphicBuffer>& buf, void const* vaddr,
const sp<const DisplayDevice>& hw,
uint32_t minLayerZ, uint32_t maxLayerZ) {
if (DEBUG_SCREENSHOTS) {
for (ssize_t y=0 ; y<buf->height ; y++) {
uint32_t const * p = (uint32_t const *)vaddr + y*buf->stride;
for (ssize_t x=0 ; x<buf->width ; x++) {
if (p[x] != 0xFF000000) return;
}
}
ALOGE("*** we just took a black screenshot ***\n"
"requested minz=%d, maxz=%d, layerStack=%d",
minLayerZ, maxLayerZ, hw->getLayerStack());
const LayerVector& layers( mDrawingState.layersSortedByZ );
const size_t count = layers.size();
for (size_t i=0 ; i<count ; ++i) {
const sp<Layer>& layer(layers[i]);
const Layer::State& state(layer->getDrawingState());
const bool visible = (state.layerStack == hw->getLayerStack())
&& (state.z >= minLayerZ && state.z <= maxLayerZ)
&& (layer->isVisible());
ALOGE("%c index=%d, name=%s, layerStack=%d, z=%d, visible=%d, flags=%x, alpha=%x",
visible ? '+' : '-',
i, layer->getName().string(), state.layerStack, state.z,
layer->isVisible(), state.flags, state.alpha);
}
}
}
// ---------------------------------------------------------------------------
SurfaceFlinger::LayerVector::LayerVector() {

3
services/surfaceflinger/SurfaceFlinger.h
View File

@ -400,6 +400,9 @@ private:
String8& result) const;
bool startDdmConnection();
static void appendSfConfigString(String8& result);
void checkScreenshot(const sp<GraphicBuffer>& buf, void const* vaddr,
const sp<const DisplayDevice>& hw,
uint32_t minLayerZ, uint32_t maxLayerZ);
/* ------------------------------------------------------------------------
* Attributes