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2014/10/16 ¤W¤È 08:14:18
android Programming Glossary: glreadpixelsAndroid SDK: Get raw preview camera image without displaying it http://stackoverflow.com/questions/10775942/android-sdk-get-raw-preview-camera-image-without-displaying-it RGB texture data to the CPU for further processing using glReadPixels if desired. Do your processing on the CPU You can simply create..
http://stackoverflow.com/questions/12462944/how-to-take-a-screenshot-of-other-app-programmatically-without-root-permission within the Android graphics subsystem this uses a glReadPixels call to retrieve the pixels from the GPU back to the CPU. The.. of course that you as an application writer can't call glReadPixels because you don't have access to the relevant OpenGL context...
Taking screenshot of Android OpenGL http://stackoverflow.com/questions/3310990/taking-screenshot-of-android-opengl size 4 buf.order ByteOrder.nativeOrder glContext.glReadPixels 0 0 width height GL10.GL_RGBA GL10.GL_UNSIGNED_BYTE buf int.. is completely black. I found there is some problem with glReadPixels method but I don't know how to bypass it. Any guidance will.. screenshotSize 4 bb.order ByteOrder.nativeOrder gl.glReadPixels 0 0 width height GL10.GL_RGBA GL10.GL_UNSIGNED_BYTE bb int..
Detect user's touches over an OpenGL square [duplicate] http://stackoverflow.com/questions/4154272/detect-users-touches-over-an-opengl-square scene to black and draw your square in solid blue. Use glReadPixels to get the colour value at the touch location. If it's blue..
Android: How can you get framebuffer (screenshot) on rooted device? http://stackoverflow.com/questions/4998527/android-how-can-you-get-framebuffer-screenshot-on-rooted-device but no actual code to get the framebuffer. I also tried glReadPixels but no luck. public void TakeScreen DisplayMetrics dm new DisplayMetrics.. screenshotSize 4 bb.order ByteOrder.nativeOrder gl.glReadPixels 0 0 width height GL10.GL_RGBA GL10.GL_UNSIGNED_BYTE bb int..
Android SDK: Get raw preview camera image without displaying it http://stackoverflow.com/questions/10775942/android-sdk-get-raw-preview-camera-image-without-displaying-it preview frame from the camera. You can also read back the RGB texture data to the CPU for further processing using glReadPixels if desired. Do your processing on the CPU You can simply create a dummy SurfaceTexture object without any OpenGL context..
http://stackoverflow.com/questions/12462944/how-to-take-a-screenshot-of-other-app-programmatically-without-root-permission and also some undocumented APIs. However it's possible. Internally within the Android graphics subsystem this uses a glReadPixels call to retrieve the pixels from the GPU back to the CPU. The GPU is used for most of the compositing on Android. In fact.. even hit the CPU. So it can be extremely high performance. Note of course that you as an application writer can't call glReadPixels because you don't have access to the relevant OpenGL context. It's owned by the surface flinger. Using dev graphics fb0..
Taking screenshot of Android OpenGL http://stackoverflow.com/questions/3310990/taking-screenshot-of-android-opengl follows nt size width height ByteBuffer buf ByteBuffer.allocateDirect size 4 buf.order ByteOrder.nativeOrder glContext.glReadPixels 0 0 width height GL10.GL_RGBA GL10.GL_UNSIGNED_BYTE buf int data new int size buf.asIntBuffer .get data buf null Bitmap.. site link text In each case the result is a png file which is completely black. I found there is some problem with glReadPixels method but I don't know how to bypass it. Any guidance will very helpfull. Thank You in advance Gordon android opengl es.. width height ByteBuffer bb ByteBuffer.allocateDirect screenshotSize 4 bb.order ByteOrder.nativeOrder gl.glReadPixels 0 0 width height GL10.GL_RGBA GL10.GL_UNSIGNED_BYTE bb int pixelsBuffer new int screenshotSize bb.asIntBuffer .get pixelsBuffer..
Detect user's touches over an OpenGL square [duplicate] http://stackoverflow.com/questions/4154272/detect-users-touches-over-an-opengl-square functionality available under OpenGL ES. For example clear your scene to black and draw your square in solid blue. Use glReadPixels to get the colour value at the touch location. If it's blue then the touch is on the square. This is probably a more expensive..
Android: How can you get framebuffer (screenshot) on rooted device? http://stackoverflow.com/questions/4998527/android-how-can-you-get-framebuffer-screenshot-on-rooted-device is rooted. I see many answers that it requires rooted access but no actual code to get the framebuffer. I also tried glReadPixels but no luck. public void TakeScreen DisplayMetrics dm new DisplayMetrics getWindowManager .getDefaultDisplay .getMetrics.. screenshotSize width height ByteBuffer bb ByteBuffer.allocateDirect screenshotSize 4 bb.order ByteOrder.nativeOrder gl.glReadPixels 0 0 width height GL10.GL_RGBA GL10.GL_UNSIGNED_BYTE bb int pixelsBuffer new int screenshotSize bb.asIntBuffer .get pixelsBuffer..
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