CreateCompatibleDC.c

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/*
 * PROJECT:         ReactOS api tests
 * LICENSE:         GPL - See COPYING in the top level directory
 * PURPOSE:         Test for CreateCompatibleDC
 * PROGRAMMERS:     Timo Kreuzer
 */
 
#include "precomp.h"
 
void Test_CreateCompatibleDC()
{
    HDC hdcScreen, hOldDC, hdc, hdc2;
    HPEN hOldPen;
    COLORREF color;
 
    /* Get screen DC */
    hdcScreen = GetDC(NULL);
 
    /* Test NULL DC handle */
    SetLastError(ERROR_SUCCESS);
    hdc = CreateCompatibleDC(NULL);
    ok(hdc != NULL, "CreateCompatibleDC(NULL) failed\n");
    ok(GetLastError() == ERROR_SUCCESS, "GetLastError() == %ld\n", GetLastError());
    if(hdc) DeleteDC(hdc);
 
    /* Test invalid DC handle */
    SetLastError(ERROR_SUCCESS);
    hdc = CreateCompatibleDC((HDC)0x123456);
    ok(hdc == NULL, "Expected NULL, got %p\n", hdc);
    ok(GetLastError() == ERROR_SUCCESS, "GetLastError() == %ld\n", GetLastError());
    if(hdc) DeleteDC(hdc);
 
    hdc = CreateCompatibleDC(hdcScreen);
    ok(hdc != NULL, "CreateCompatibleDC failed\n");
 
    // Test if first selected pen is BLACK_PEN (? or same as screen DC's pen?)
    hOldPen = SelectObject(hdc, GetStockObject(DC_PEN));
    ok (hOldPen == GetStockObject(BLACK_PEN), "hOldPen == %p\n", hOldPen);
    hOldPen = SelectObject(hdc, GetStockObject(BLACK_PEN));
    ok (hOldPen == GetStockObject(DC_PEN), "hOldPen == %p\n", hOldPen);
 
    /* Test for the starting Color == RGB(0,0,0) */
    color = SetDCPenColor(hdc, RGB(1,2,3));
    ok(color == RGB(0,0,0), "color == %lx\n", color);
 
    /* Check for reuse counter */
    hOldDC = hdc;
    DeleteDC(hdc);
    hdc = CreateCompatibleDC(hdcScreen);
    hdc2 = CreateCompatibleDC(hOldDC);
    ok(hdc2 == NULL, "Expected NULL, got %p\n", hdc);
    if (hdc2 != NULL) DeleteDC(hdc2);
 
    /* Check map mode */
    hdc = CreateCompatibleDC(hdcScreen);
    SetMapMode(hdc, MM_ISOTROPIC);
    hdc2 = CreateCompatibleDC(hdc);
    ok(GetMapMode(hdc2) == MM_TEXT, "GetMapMode(hdc2)==%d\n", GetMapMode(hdc2));
 
    /* cleanup */
    DeleteDC(hdc);
 
    ReleaseDC(NULL, hdcScreen);
}
 
START_TEST(CreateCompatibleDC)
{
    Test_CreateCompatibleDC();
}