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      1 /*
      2  * Copyright (C) 2010 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include <signal.h>
     32 #include <stdio.h>
     33 #include <stdlib.h>
     34 #include <windows.h>
     35 
     36 static BOOL fontSmoothingEnabled = FALSE;
     37 
     38 static void saveInitialSettings(void)
     39 {
     40     ::SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, &fontSmoothingEnabled, 0);
     41 }
     42 
     43 // Technically, all we need to do is disable ClearType. However,
     44 // for some reason, the call to SPI_SETFONTSMOOTHINGTYPE doesn't
     45 // seem to work, so we just disable font smoothing all together
     46 // (which works reliably)
     47 static void installLayoutTestSettings(void)
     48 {
     49     ::SystemParametersInfo(SPI_SETFONTSMOOTHING, FALSE, 0, 0);
     50 }
     51 
     52 static void restoreInitialSettings(void)
     53 {
     54     ::SystemParametersInfo(SPI_SETFONTSMOOTHING, static_cast<UINT>(fontSmoothingEnabled), 0, 0);
     55 }
     56 
     57 static void simpleSignalHandler(int signalNumber)
     58 {
     59     // Try to restore the settings and then go down cleanly
     60     restoreInitialSettings();
     61     exit(128 + signalNumber);
     62 }
     63 
     64 int main(int, char*[])
     65 {
     66     // Hooks the ways we might get told to clean up...
     67     signal(SIGINT, simpleSignalHandler);
     68     signal(SIGTERM, simpleSignalHandler);
     69 
     70     saveInitialSettings();
     71 
     72     installLayoutTestSettings();
     73 
     74     // Let the script know we're ready
     75     printf("ready\n");
     76     fflush(stdout);
     77 
     78     // Wait for any key (or signal)
     79     getchar();
     80 
     81     restoreInitialSettings();
     82 
     83     return EXIT_SUCCESS;
     84 }
     85