Java Code Examples for android.opengl.GLES20. The following code examples are extracted from open source projects. You can click to vote up the examples that are useful to you.
To read the pixel we’ll use function glReadPixels. [stextbox]void glReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *data); Parameters: x,y: the coordinates of the first pixel of the rectangular block to be read; width, height: the size of the block.
May 31, 2011 · (glReadPixels) Finally, the components are converted to the proper, as specified by type where each component is multiplied by 2 n - 1, where n is the number of bits per component. Return values are placed in memory as follows.
// glReadPixels gives us a ByteBuffer filled with what is essentially big-endian RGBA // data (i.e. a byte of red, followed by a byte of green...). To use the Bitmap // constructor that takes an int array with pixel data, we need an int filled // with little-endian ARGB data. //
With Mesa 8.0.2 > > the developers significantly improved the performance of glReadPixels. > > Problem is, the performance boost for llvmpipe is for BGRA data only. > > Firefox seems to read RGBA data, so it doesn't benefit at all. > > Depends, but here, we're talking about software compositing, Firefox uses > Cairo for that, which wants BGRA.
glReadPixels returns values from each pixel with lower left-hand corner at (x + i, y + j) for 0 <= i < width and 0 <= j < height. This pixel is said to be the i th pixel in the j th row. Pixels are returned in row order from the lowest to the highest row, left to right in each row.
Name Description; 3rd Party Docs : All 3rd Party Docs: Abs in cerberus.math.: Returns the absolute value of x, that is, +x if x>=0 and -x if x0.: Abs in cerberus.math.: Returns the absolute value of x, that is, +x if x>=0 and -x if x0.
아래는 위의 함수로 저장한 bmp파일들입니다.