1) It's really easy to produce a native crash in Skia by unleashing two concurrent threads onto a single Bitmap.
2) There are some significant defects in the general bitmap functions associated with ALPHA_8 bitmaps
Further to (2) see these for examples:
(I'm hoping that 2.0 will have addressed these, but I haven't had time to check.)
Tom.
2009/11/5 fadden <fadden@android.com>
On Nov 4, 9:39 pm, manoj <manojkumar.m...@gmail.com> wrote:[...]
> I have taken simple example AlphaBitmap given in api demos.
> From the below log I am not understanding where I am doing wrong. AndLooks like a native crash in the Skia graphics library:
> one thing clearly notifying is that there is a memory problem.
pid: 749, tid: 767 >>> com.myapp <<<
signal 11 (SIGSEGV), fault addr 3f80001c
r0 00000180 r1 454f76e8 r2 00000074 r3 00000180
r4 00000080 r5 fffffff4 r6 beab6144 r7 00000180
r8 001f34c8 r9 ffffff80 10 beab6144 fp 00000200
ip 3f800000 sp 454f7698 lr ac03e01c pc ac043db0Stack Trace:
RELADDR
FUNCTION
FILE:LINE
v------>
ClampX_ClampY_nofilter_scale /
usr/local/google/buildbot/buildroot/device/external/skia/src/core/
SkBitmapProcState_matrix.h:28
00043db0 ClampX_ClampY_nofilter_scale(SkBitmapProcState const&,
unsigned int*, int, int, int) /usr/local/
google/buildbot/buildroot/device/external/skia/src/core/
SkBitmapProcState_matrix.h:28
0003e018 SkBitmapProcShader::shadeSpan(int, int, unsigned int*,
int) /usr/local/
google/buildbot/buildroot/device/external/skia/src/core/
SkBitmapProcShader.cpp:141
0004e910 SkARGB32_Shader_Blitter::blitH(int, int,
int) /
usr/local/google/buildbot/buildroot/device/external/skia/src/core/
SkBlitter_ARGB32.cpp:381
00047e4c SkBlitter::blitRect(int, int, int,
int) /
usr/local/google/buildbot/buildroot/device/external/skia/src/core/
SkBlitter.cpp:65
v------>
antifillrect /
usr/local/google/buildbot/buildroot/device/external/skia/src/core/
SkScan_Antihair.cpp:540
00075d64 antifillrect(SkIRect const&,
SkBlitter*) /
usr/local/google/buildbot/buildroot/device/external/skia/src/core/
SkScan_Antihair.cpp:540
v------>
antifillrect /
usr/local/google/buildbot/buildroot/device/external/skia/src/core/
SkScan_Antihair.cpp:600
000767d4 SkScan::AntiFillRect(SkRect const&, SkRegion const*,
SkBlitter*) /usr/
local/google/buildbot/buildroot/device/external/skia/src/core/
SkScan_Antihair.cpp:600
0005b3e8 SkDraw::drawRect(SkRect const&, SkPaint const&)
const /usr/
local/google/buildbot/buildroot/device/external/skia/src/core/
SkDraw.cpp:705
00054b80 SkCanvas::drawRect(SkRect const&, SkPaint
const&) /
usr/local/google/buildbot/buildroot/device/external/skia/src/core/
SkCanvas.cpp:1058
00052204 SkCanvas::drawRectCoords(float, float, float, float,
SkPaint const&) /usr/
local/google/buildbot/buildroot/device/external/skia/src/core/
SkCanvas.cpp:1299
0003e388 android::SkCanvasGlue::drawRect__FFFFPaint(_JNIEnv*,
_jobject*, SkCanvas*, float, float, float, float, SkPaint*) /usr/
local/google/buildbot/buildroot/device/frameworks/base/core/jni/
android/graphics/Canvas.cpp:404
0000e3b4
dvmPlatformInvoke /
usr/local/google/buildbot/buildroot/device/dalvik/vm/arch/arm/
CallEABI.S:242
If you have an APK that reliably reproduces this crash, please file a
bug on b.android.com and attach it.
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