/**
* Creates a texture from raw data.
*
* @param data Image data, in a "direct" ByteBuffer.
* @param width Texture width, in pixels (not bytes).
* @param height Texture height, in pixels.
* @param format Image data format (use constant appropriate for glTexImage2D(), e.g. GL_RGBA).
* @return Handle to texture.
*/
public static int createImageTexture(ByteBuffer data, int width, int height, int format) {
int[] textureHandles = new int[1];
int textureHandle;
GLES20.glGenTextures(1, textureHandles, 0);
textureHandle = textureHandles[0];
GlUtil.checkGlError("glGenTextures");
// Bind the texture handle to the 2D texture target.
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle);
// Configure min/mag filtering, i.e. what scaling method do we use if what we're rendering
// is smaller or larger than the source image.
GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
GlUtil.checkGlError("loadImageTexture");
// Load the data from the buffer into the texture handle.
GLES20.glTexImage2D(
GLES20.GL_TEXTURE_2D, /*level*/
0,
format,
width,
height, /*border*/
0,
format,
GLES20.GL_UNSIGNED_BYTE,
data);
GlUtil.checkGlError("loadImageTexture");
return textureHandle;
}
