# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import os
from autotest_lib.client.bin import utils
from autotest_lib.client.cros import graphics_ui_test

class graphics_Sanity(graphics_ui_test.GraphicsUITest):
    """
    This test is meant to be used as a quick sanity check for GL/GLES.
    """
    version = 1

    def setup(self):
        self.job.setup_dep(['glbench'])

    def run_once(self):
        """
        Draws a texture with a soft ellipse twice and captures each image.
        Compares the output fuzzily against reference images.
        """
        dep = 'glbench'
        dep_dir = os.path.join(self.autodir, 'deps', dep)
        self.job.install_pkg(dep, 'dep', dep_dir)

        screenshot1_reference = os.path.join(self.bindir,
                                            "screenshot1_reference.png")
        screenshot1_generated = os.path.join(self.resultsdir,
                                            "screenshot1_generated.png")
        screenshot1_resized = os.path.join(self.resultsdir,
                                            "screenshot1_generated_resized.png")
        screenshot2_reference = os.path.join(self.bindir,
                                            "screenshot2_reference.png")
        screenshot2_generated = os.path.join(self.resultsdir,
                                            "screenshot2_generated.png")
        screenshot2_resized = os.path.join(self.resultsdir,
                                            "screenshot2_generated_resized.png")

        exefile = os.path.join(self.autodir, 'deps/glbench/windowmanagertest')
        # Enable running in window manager.
        exefile = ('chvt 1 && DISPLAY=:0 XAUTHORITY=/home/chronos/.Xauthority '
                   + exefile)

        # Delay before screenshot: 1 second has caused failures.
        options = ' --screenshot1_sec 2'
        options += ' --screenshot2_sec 1'
        options += ' --cooldown_sec 1'
        # perceptualdiff can handle only 8 bit images.
        options += ' --screenshot1_cmd "DISPLAY=:0 import -channel RGB'
        options += ' -colorspace RGB -depth 8 -window root'
        options += ' %s"' % screenshot1_generated
        options += ' --screenshot2_cmd "DISPLAY=:0 import -channel RGB'
        options += ' -colorspace RGB -depth 8 -window root'
        options += ' %s"' % screenshot2_generated

        utils.system(exefile + " " + options)

        # convert -resize -depth 8 does not work. But resize honors previously
        # chosen bit depth.
        utils.system("convert -resize '100x100!' %s %s" %
                     (screenshot1_generated, screenshot1_resized))
        utils.system("convert -resize '100x100!' %s %s" %
                     (screenshot2_generated, screenshot2_resized))
        os.remove(screenshot1_generated)
        os.remove(screenshot2_generated)

        utils.system("perceptualdiff -verbose %s %s"
                     % (screenshot1_reference, screenshot1_resized))
        utils.system("perceptualdiff -verbose %s %s"
                     % (screenshot2_reference, screenshot2_resized))