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 #if 0 // FIXME: x86 uses 80 bits internally, so the result doesn't reflect the actual FLOAT result
  67     ok(xform.eM12 * xform.eM21 != (FLOAT)1.0, "xform.eM12 * xform.eM21 shouldn't be 1.0\n");
  68 #endif
  69     result = SetWorldTransform(hdc, &xform);
  70     ok(result == 0, "SetWorldTransform should fail\n");
  71
  72     /* Test world transform (should be unchanged by previous failure) */
  73     result = GetWorldTransform(hdc, &xform);
  74     ok(result == 1, "GetWorldTransform should succeed\n");
  75     ok(xform.eM11 == 2, "xform.eM11 should be 2\n");
  76     ok(xform.eM12 == (FLOAT)3.0001, "xform.eM12 should be 3.0001\n");
  77     ok(xform.eM21 == 4, "xform.eM21 should be 4\n");
  78     ok(xform.eM22 == 6, "xform.eM22 should be 6\n");
  79
  80     /* Set smallest possible values */
  81     xform.eM11 = 1.17549435e-38f;
  82     xform.eM12 = 0;
  83     xform.eM21 = 0;
  84     xform.eM22 = 1.17549435e-38f;
  85     ok(xform.eM11 != (FLOAT)0.0, "xform.eM11 shouldn't be 0.0\n");
  86     ok(xform.eM22 != (FLOAT)0.0, "xform.eM22 shouldn't be 0.0\n");
  87 #if 0 // FIXME: x86 uses 80 bits internally, so the result doesn't reflect the actual FLOAT result
  88     ok(xform.eM11 * xform.eM22 != (FLOAT)0.0, "xform.eM12 * xform.eM21 shouldn't be 0.0\n");
  89 #endif
  90     result = SetWorldTransform(hdc, &xform);
  91     ok(result == 1, "SetWorldTransform should succeed\n");
  92
  93     /* Test world transform */
  94     result = GetWorldTransform(hdc, &xform);
  95     ok(result == 1, "GetWorldTransform should succeed\n");
  96     ok(xform.eM11 > 0, "xform.eM11 should not be 0\n");
  97     ok(xform.eM12 == 0, "xform.eM12 should be 0\n");
  98     ok(xform.eM21 == 0, "xform.eM21 should be 0\n");
  99     ok(xform.eM22 > 0, "xform.eM22 should not be 0\n");
 100
 101     xform.eM11 = 0;
 102     xform.eM12 = 1;
 103     xform.eM21 = 1;
 104     xform.eM22 = 0;
 105     result = SetWorldTransform(hdc, &xform);
 106     ok_int(result, 1);
 107
 108     xform.eM11 = 1;
 109     xform.eM12 = 1;
 110     xform.eM21 = 1;
 111     xform.eM22 = 1;
 112     result = SetWorldTransform(hdc, &xform);
 113     ok_int(result, 0);
 114
 115     result = GetWorldTransform(hdc, &xform);
 116     ok_int(result, 1);
 117     ok(xform.eM11 == 0, "xform.eM11 should be 0\n");
 118     ok(xform.eM12 == 1, "xform.eM12 should be 1\n");
 119     ok(xform.eM21 == 1, "xform.eM21 should be 1\n");
 120     ok(xform.eM22 == 0, "xform.eM22 should be 0\n");
 121
 122     DeleteDC(hdc);
 123 }
 124
 125 START_TEST(SetWorldTransform)
 126 {
 127     Test_SetWorldTransform();
 128 }