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2014/10/16 ¤W¤È 08:13:49
android Programming Glossary: framebufferFramebuffer FBO render to texture is very slow, using OpenGL ES 2.0 on Android, why? http://stackoverflow.com/questions/10729352/framebuffer-fbo-render-to-texture-is-very-slow-using-opengl-es-2-0-on-android it to the back buffer again. When I draw the FBO to the framebuffer even trasparent without any color the framerates drops from.. every game is fine on that phone I believe they use the framebuffer as well. On the Galaxy SII mali 400 gpu runs fine I am quite.. I am making a mistake somewhere I share my code. Create a framebuffer and renderbuffer GLES20.glGenFramebuffers 1 fb offset GLES20.glGenRenderbuffers..
is canvas in android proportional on different devices http://stackoverflow.com/questions/11739730/is-canvas-in-android-proportional-on-different-devices a Canvas called frameBuffer which will render the virtual framebuffer frameBuffer.drawBitmap this.gameScreen null new Rect 0 0 width..
http://stackoverflow.com/questions/12462944/how-to-take-a-screenshot-of-other-app-programmatically-without-root-permission try to read these Linux device files which represent the framebuffer. However there are three problems You need root. Sometimes they're.. Since they design the hardware they have access to the framebuffer and they often are able to provide libraries which entirely.. it's possible on some hardware to pipe the phone hardware framebuffer directly into the phone hardware H.264 video encoder and retrieve..
Why my opengl output differs for various devices? http://stackoverflow.com/questions/17187032/why-my-opengl-output-differs-for-various-devices immediate mode rendering. For this type of rendering the framebuffer is divided into tiles of size 16 by 16 pixels. The Polygon List.. buffer the GPU only writes the tile buffer contents to the framebuffer in main memory at the end of each tile. Non tiled based immediate.. based immediate mode renderers generally require many more framebuffer accesses. The tile based method therefore consumes less memory..
http://stackoverflow.com/questions/4579573/android-graphics-internals or window manager Android uses to multiplex access to the framebuffer though so any pointers would be much appreciated Finally from.. Again any pointers would be appreciated. android graphics framebuffer skia share improve this question There are two core pieces..
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 How can you get framebuffer screenshot on rooted device I tried process Runtime.getRuntime.. it requires rooted access but no actual code to get the framebuffer. I also tried glReadPixels but no luck. public void TakeScreen.. bitmap screenshots capturedImage android screenshot framebuffer share improve this question Seems to me like your problem..
Compiling C code (netcat) to native Android executable http://stackoverflow.com/questions/6168303/compiling-c-code-netcat-to-native-android-executable I'm writing a bash script that uses Netcat to serve framebuffer over network connection but first I need to compile it to native..
Framebuffer FBO render to texture is very slow, using OpenGL ES 2.0 on Android, why? http://stackoverflow.com/questions/10729352/framebuffer-fbo-render-to-texture-is-very-slow-using-opengl-es-2-0-on-android to the backbuffer I draw lights to a FBO and try to blend it to the back buffer again. When I draw the FBO to the framebuffer even trasparent without any color the framerates drops from 60 to 30 on a Samsung Galaxy w it has an adreno 205 as gpu ... with lighting effects on that phone and they run fine almost every game is fine on that phone I believe they use the framebuffer as well. On the Galaxy SII mali 400 gpu runs fine I am quite new to opengl so I believe I am making a mistake somewhere.. mali 400 gpu runs fine I am quite new to opengl so I believe I am making a mistake somewhere I share my code. Create a framebuffer and renderbuffer GLES20.glGenFramebuffers 1 fb offset GLES20.glGenRenderbuffers 1 depthRb offset Create a texture to hold..
is canvas in android proportional on different devices http://stackoverflow.com/questions/11739730/is-canvas-in-android-proportional-on-different-devices
http://stackoverflow.com/questions/12462944/how-to-take-a-screenshot-of-other-app-programmatically-without-root-permission Using dev graphics fb0 and similar Some are tempted to try to read these Linux device files which represent the framebuffer. However there are three problems You need root. Sometimes they're not even there. Often they don't represent the real screen.. to the Android chipset makers often presents a solution. Since they design the hardware they have access to the framebuffer and they often are able to provide libraries which entirely avoid the Android permissions model by simply accessing their.. can provide outstanding results. For example I have heard it's possible on some hardware to pipe the phone hardware framebuffer directly into the phone hardware H.264 video encoder and retrieve a pre encoded video stream of whatever is on the phone..
Why my opengl output differs for various devices? http://stackoverflow.com/questions/17187032/why-my-opengl-output-differs-for-various-devices NOT the case in mobile graphics. The Mali GPUs use tile based immediate mode rendering. For this type of rendering the framebuffer is divided into tiles of size 16 by 16 pixels. The Polygon List Builder PLB organizes input data from the application into.. Because this tile based approach uses a fast on chip tile buffer the GPU only writes the tile buffer contents to the framebuffer in main memory at the end of each tile. Non tiled based immediate mode renderers generally require many more framebuffer.. in main memory at the end of each tile. Non tiled based immediate mode renderers generally require many more framebuffer accesses. The tile based method therefore consumes less memory bandwidth and supports operations such as depth testing blending..
http://stackoverflow.com/questions/4579573/android-graphics-internals buffer . I haven't found much on what sort of display server or window manager Android uses to multiplex access to the framebuffer though so any pointers would be much appreciated Finally from what I understand the ARM instruction set provides instructions.. some references suggesting they're closed source binaries. Again any pointers would be appreciated. android graphics framebuffer skia share improve this question There are two core pieces to Android graphics SurfaceFlinger and Skia. SurfaceFlinger..
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 How can you get framebuffer screenshot on rooted device I tried process Runtime.getRuntime .exec su c cat dev graphics fb0 sdcard frame.raw process.waitFor.. it doesn't work. My 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.. v 0xf800 11 sb.rewind bitmap.copyPixelsFromBuffer sb saveBitmap bitmap screenshots capturedImage android screenshot framebuffer share improve this question Seems to me like your problem is this sign . You cannot redirect output using exec . What..
Compiling C code (netcat) to native Android executable http://stackoverflow.com/questions/6168303/compiling-c-code-netcat-to-native-android-executable C code netcat to native Android executable I'm writing a bash script that uses Netcat to serve framebuffer over network connection but first I need to compile it to native executable. I even got this script to work on a Ubuntu..
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