Wirelissss maybe work On Thursday, December 22, 2011, Romain Guy <romain...@android.com> wrote: > There's no need to get the camera preview out of SurfaceTexture. The whole point of SurfaceTexture is to let a producer like the camera render into an OpenGL texture. Just use SurfaceTexture. > > To draw on top of TextureView, just add another view on top of it. > > On Dec 21, 2011 9:35 PM, "Brad Grimm" <sna...@gmail.com> wrote: > > Thanks for the post, it has been really helpful. > > But say I want to draw on top of a SurfaceTexture that is connected to > a Camera via setPreviewTexture. I can get the SurfaceTexture by a > SurfaceTextureListener. But if I just try to use > eglCreateWindowSurface & eglMakeCurrent it fails due to the surface > already being connected. > 1) Is it possible to draw on this surface at all? Or does binding it > to the camera make it impossible to do that. > 2) If it isn't possible. Can the surface be used (or copied) quickly > to an OpenGL texture and used in a separate surface? If so how? > 3) If not, what would be the fastest way to get the camera preview out > of a SurfaceTexture and into OpenGL? > P.S. - I too followed suit and posted to StackOverflow: > http://stackoverflow.com/questions/8582090/possible-to-draw-on-surfacetexture-attached-to-camera > On Nov 23, 11:45 am, plafayette <pierre.lafaye...@gmail.com> wrote: >> Thanks for the quick response Romain and the sample code! Will give it >> a try. >> >> On Nov 23, 12:17 pm, Romain Guy <romain...@android.com> wrote: >> >> >> >> >> >> >> >> > GLSurfaceView handles GL setup for you, whichTextureViewwill not do. A >> >TextureViewcan be used as the native window when you create an EGL >> > surface. Here is an example (the interesting part is the call >> > to eglCreateWindowSurface()): >> >> > @Override >> > public void onSurfaceTextureAvailable(SurfaceTexture surface, int >> > width, int height) { >> > mRenderThread = new RenderThread(getResources(), surface); >> > mRenderThread.start(); >> > } >> >> > private static class RenderThread extends Thread { >> > private static final String LOG_TAG = "GLTextureView"; >> >> > static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098; >> > static final int EGL_OPENGL_ES2_BIT = 4; >> >> > private volatile boolean mFinished; >> >> > private final Resources mResources; >> > private final SurfaceTexture mSurface; >> >> > private EGL10 mEgl; >> > private EGLDisplay mEglDisplay; >> > private EGLConfig mEglConfig; >> > private EGLContext mEglContext; >> > private EGLSurface mEglSurface; >> > private GL mGL; >> >> > RenderThread(Resources resources, SurfaceTexture surface) { >> > mResources = resources; >> > mSurface = surface; >> > } >> >> > private static final String sSimpleVS = >> > "attribute vec4 position;\n" + >> > "attribute vec2 texCoords;\n" + >> > "varying vec2 outTexCoords;\n" + >> > "\nvoid main(void) {\n" + >> > " outTexCoords = texCoords;\n" + >> > " gl_Position = position;\n" + >> > "}\n\n"; >> > private static final String sSimpleFS = >> > "precision mediump float;\n\n" + >> > "varying vec2 outTexCoords;\n" + >> > "uniform sampler2D texture;\n" + >> > "\nvoid main(void) {\n" + >> > " gl_FragColor = texture2D(texture, outTexCoords);\n" + >> > "}\n\n"; >> >> > private static final int FLOAT_SIZE_BYTES = 4; >> > private static final int TRIANGLE_VERTICES_DATA_STRIDE_BYTES = 5 * >> > FLOAT_SIZE_BYTES; >> > private static final int TRIANGLE_VERTICES_DATA_POS_OFFSET = 0; >> > private static final int TRIANGLE_VERTICES_DATA_UV_OFFSET = 3; >> > private final float[] mTriangleVerticesData = { >> > // X, Y, Z, U, V >> > -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, >
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