public void copyTexture2D(RawTexture texture, int x, int y, int width, int height)
throws GLOutOfMemoryException {
Matrix matrix = mTransformation.getMatrix();
matrix.getValues(mMatrixValues);
if (isMatrixRotatedOrFlipped(mMatrixValues)) {
throw new IllegalArgumentException("cannot support rotated matrix");
}
float points[] = mapPoints(matrix, x, y + height, x + width, y);
x = (int) points[0];
y = (int) points[1];
width = (int) points[2] - x;
height = (int) points[3] - y;
GL11 gl = mGL;
int newWidth = Util.nextPowerOf2(width);
int newHeight = Util.nextPowerOf2(height);
int glError = GL11.GL_NO_ERROR;
gl.glBindTexture(GL11.GL_TEXTURE_2D, texture.getId());
int[] cropRect = {0, 0, width, height};
gl.glTexParameteriv(GL11.GL_TEXTURE_2D, GL11Ext.GL_TEXTURE_CROP_RECT_OES, cropRect, 0);
gl.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP_TO_EDGE);
gl.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_CLAMP_TO_EDGE);
gl.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
gl.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
gl.glCopyTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, x, y, newWidth, newHeight, 0);
glError = gl.glGetError();
if (glError == GL11.GL_OUT_OF_MEMORY) {
throw new GLOutOfMemoryException();
}
if (glError != GL11.GL_NO_ERROR) {
throw new RuntimeException("Texture copy fail, glError " + glError);
}
texture.setSize(width, height);
texture.setTextureSize(newWidth, newHeight);
}
