modules/rostests/apitests/gdi32/SetWorldTransform.c

   1 /*
   2  * PROJECT:         ReactOS api tests
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * PURPOSE:         Test for SetWorldTransform
   5  * PROGRAMMERS:     Timo Kreuzer
   6  */
   7
   8 #include "precomp.h"
   9
  10 void Test_SetWorldTransform()
  11 {
  12         HDC hdcScreen, hdc;
  13         XFORM xform;
  14         BOOL result;
  15         //PGDI_TABLE_ENTRY pEntry;
  16         //DC_ATTR* pdcattr;
  17
  18         /* Create a DC */
  19         hdcScreen = GetDC(NULL);
  20         hdc = CreateCompatibleDC(hdcScreen);
  21         ReleaseDC(NULL, hdcScreen);
  22         SetGraphicsMode(hdc, GM_ADVANCED);
  23
  24     /* Set identity transform */
  25     xform.eM11 = 1;
  26     xform.eM12 = 0;
  27     xform.eM21 = 0;
  28     xform.eM22 = 1;
  29     xform.eDx = 0;
  30     xform.eDy = 0;
  31     result = SetWorldTransform(hdc, &xform);
  32     ok(result == 1, "SetWorldTransform should succeed\n");
  33
  34     /* Set eM11 to 0 */
  35     xform.eM11 = 0;
  36     result = SetWorldTransform(hdc, &xform);
  37     ok(result == 0, "SetWorldTransform should fail\n");
  38
  39     /* Set eM22 to 0 */
  40     xform.eM11 = 1;
  41     xform.eM22 = 0;
  42     result = SetWorldTransform(hdc, &xform);
  43     ok(result == 0, "SetWorldTransform should fail\n");
  44
  45     /* Set values that result in the determinant being 0 */
  46     xform.eM11 = 2;
  47     xform.eM12 = 3;
  48     xform.eM21 = 4;
  49     xform.eM22 = 6;
  50     result = SetWorldTransform(hdc, &xform);
  51     ok(result == 0, "SetWorldTransform should fail\n");
  52
  53     /* Small modification to make the determinant != 0 */
  54     xform.eM12 = (FLOAT)3.0001;
  55     result = SetWorldTransform(hdc, &xform);
  56     ok(result == 1, "SetWorldTransform should succeed\n");
  57
  58     /* Set values that result in the determinant being 0 due to rounding */
  59     xform.eM11 = 1;
  60     xform.eM12 = (FLOAT)0.9999999;
  61     xform.eM21 = (FLOAT)1.0000001;
  62     xform.eM22 = 1;
  63     ok(xform.eM12 != (FLOAT)1.0, "xform.eM12 shouldn't be 1.0\n");
  64     ok(xform.eM21 != (FLOAT)1.0, "xform.eM21 shouldn't be 1.0\n");
  65     ok(xform.eM12 * xform.eM21 != (FLOAT)1.0, "xform.eM12 * xform.eM21 shouldn't be 1.0\n");
  66     result = SetWorldTransform(hdc, &xform);
  67     ok(result == 0, "SetWorldTransform should fail\n");
  68
  69     /* Test world transform (should be unchanged by previous failure) */
  70     result = GetWorldTransform(hdc, &xform);
  71     ok(result == 1, "GetWorldTransform should succeed\n");
  72     ok(xform.eM11 == 2, "xform.eM11 should be 2\n");
  73     ok(xform.eM12 == (FLOAT)3.0001, "xform.eM11 should be 3.0001\n");
  74     ok(xform.eM21 == 4, "xform.eM11 should be 4\n");
  75     ok(xform.eM22 == 6, "xform.eM11 should be 6\n");
  76
  77     /* Set smallest possible values */
  78     xform.eM11 = (FLOAT)1.4e-45;
  79     xform.eM12 = 0;
  80     xform.eM21 = 0;
  81     xform.eM22 = (FLOAT)1.4e-45;
  82     ok(xform.eM11 != (FLOAT)0.0, "xform.eM11 shouldn't be 0.0\n");
  83     ok(xform.eM22 != (FLOAT)0.0, "xform.eM22 shouldn't be 0.0\n");
  84     ok(xform.eM11 * xform.eM22 != (FLOAT)0.0, "xform.eM12 * xform.eM21 shouldn't be 0.0\n");
  85     result = SetWorldTransform(hdc, &xform);
  86     ok(result == 1, "SetWorldTransform should succeed\n");
  87
  88     /* Test world transform */
  89     result = GetWorldTransform(hdc, &xform);
  90     ok(result == 1, "GetWorldTransform should succeed\n");
  91     ok(xform.eM11 > 0, "xform.eM11 should not be 0\n");
  92     ok(xform.eM12 == 0, "xform.eM11 should be 0\n");
  93     ok(xform.eM21 == 0, "xform.eM11 should be 0\n");
  94     ok(xform.eM22 > 0, "xform.eM11 should not be 0\n");
  95
  96         DeleteDC(hdc);
  97 }
  98
  99 START_TEST(SetWorldTransform)
 100 {
 101     Test_SetWorldTransform();
 102 }
 103