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  *                  Katayama Hirofumi MZ
   7  */
   8
   9 #include "precomp.h"
  10
  11 void Test_SetWorldTransform()
  12 {
  13     HDC hdcScreen, hdc;
  14     XFORM xform;
  15     BOOL result;
  16     //PGDI_TABLE_ENTRY pEntry;
  17     //DC_ATTR* pdcattr;
  18
  19     /* Create a DC */
  20     hdcScreen = GetDC(NULL);
  21     hdc = CreateCompatibleDC(hdcScreen);
  22     ReleaseDC(NULL, hdcScreen);
  23     SetGraphicsMode(hdc, GM_ADVANCED);
  24
  25     /* Set identity transform */
  26     xform.eM11 = 1;
  27     xform.eM12 = 0;
  28     xform.eM21 = 0;
  29     xform.eM22 = 1;
  30     xform.eDx = 0;
  31     xform.eDy = 0;
  32     result = SetWorldTransform(hdc, &xform);
  33     ok(result == 1, "SetWorldTransform should succeed\n");
  34
  35     /* Set eM11 to 0 */
  36     xform.eM11 = 0;
  37     result = SetWorldTransform(hdc, &xform);
  38     ok(result == 0, "SetWorldTransform should fail\n");
  39
  40     /* Set eM22 to 0 */
  41     xform.eM11 = 1;
  42     xform.eM22 = 0;
  43     result = SetWorldTransform(hdc, &xform);
  44     ok(result == 0, "SetWorldTransform should fail\n");
  45
  46     /* Set values that result in the determinant being 0 */
  47     xform.eM11 = 2;
  48     xform.eM12 = 3;
  49     xform.eM21 = 4;
  50     xform.eM22 = 6;
  51     result = SetWorldTransform(hdc, &xform);
  52     ok(result == 0, "SetWorldTransform should fail\n");
  53
  54     /* Small modification to make the determinant != 0 */
  55     xform.eM12 = (FLOAT)3.0001;
  56     result = SetWorldTransform(hdc, &xform);
  57     ok(result == 1, "SetWorldTransform should succeed\n");
  58
  59     /* Set values that result in the determinant being 0 due to rounding */
  60     xform.eM11 = 1;
  61     xform.eM12 = (FLOAT)0.9999999;
  62     xform.eM21 = (FLOAT)1.0000001;
  63     xform.eM22 = 1;
  64     ok(xform.eM12 != (FLOAT)1.0, "xform.eM12 shouldn't be 1.0\n");
  65     ok(xform.eM21 != (FLOAT)1.0, "xform.eM21 shouldn't be 1.0\n");
  66     ok(xform.eM12 * xform.eM21 != (FLOAT)1.0, "xform.eM12 * xform.eM21 shouldn't be 1.0\n");
  67     result = SetWorldTransform(hdc, &xform);
  68     ok(result == 0, "SetWorldTransform should fail\n");
  69
  70     /* Test world transform (should be unchanged by previous failure) */
  71     result = GetWorldTransform(hdc, &xform);
  72     ok(result == 1, "GetWorldTransform should succeed\n");
  73     ok(xform.eM11 == 2, "xform.eM11 should be 2\n");
  74     ok(xform.eM12 == (FLOAT)3.0001, "xform.eM12 should be 3.0001\n");
  75     ok(xform.eM21 == 4, "xform.eM21 should be 4\n");
  76     ok(xform.eM22 == 6, "xform.eM22 should be 6\n");
  77
  78     /* Set smallest possible values */
  79     xform.eM11 = 1.17549435e-38f;
  80     xform.eM12 = 0;
  81     xform.eM21 = 0;
  82     xform.eM22 = 1.17549435e-38f;
  83     ok(xform.eM11 != (FLOAT)0.0, "xform.eM11 shouldn't be 0.0\n");
  84     ok(xform.eM22 != (FLOAT)0.0, "xform.eM22 shouldn't be 0.0\n");
  85     ok(xform.eM11 * xform.eM22 != (FLOAT)0.0, "xform.eM12 * xform.eM21 shouldn't be 0.0\n");
  86     result = SetWorldTransform(hdc, &xform);
  87     ok(result == 1, "SetWorldTransform should succeed\n");
  88
  89     /* Test world transform */
  90     result = GetWorldTransform(hdc, &xform);
  91     ok(result == 1, "GetWorldTransform should succeed\n");
  92     ok(xform.eM11 > 0, "xform.eM11 should not be 0\n");
  93     ok(xform.eM12 == 0, "xform.eM12 should be 0\n");
  94     ok(xform.eM21 == 0, "xform.eM21 should be 0\n");
  95     ok(xform.eM22 > 0, "xform.eM22 should not be 0\n");
  96
  97     xform.eM11 = 0;
  98     xform.eM12 = 1;
  99     xform.eM21 = 1;
 100     xform.eM22 = 0;
 101     result = SetWorldTransform(hdc, &xform);
 102     ok_int(result, 1);
 103
 104     xform.eM11 = 1;
 105     xform.eM12 = 1;
 106     xform.eM21 = 1;
 107     xform.eM22 = 1;
 108     result = SetWorldTransform(hdc, &xform);
 109     ok_int(result, 0);
 110
 111     result = GetWorldTransform(hdc, &xform);
 112     ok_int(result, 1);
 113     ok(xform.eM11 == 0, "xform.eM11 should be 0\n");
 114     ok(xform.eM12 == 1, "xform.eM12 should be 1\n");
 115     ok(xform.eM21 == 1, "xform.eM21 should be 1\n");
 116     ok(xform.eM22 == 0, "xform.eM22 should be 0\n");
 117
 118     DeleteDC(hdc);
 119 }
 120
 121 START_TEST(SetWorldTransform)
 122 {
 123     Test_SetWorldTransform();
 124 }