[GDI32_APITEST] Create StretchBlt Regression Test (#3109)

* Add gdi32_apitest:StretchBlt regression test.
* Give Wine proper credit for base code.

modules/rostests/apitests/gdi32/CMakeLists.txt

@@ -74,6 +74,7 @@ list(APPEND SOURCE
     SetSysColors.c
     SetWindowExtEx.c
     SetWorldTransform.c
+    StretchBlt.c
     TextTransform.c
     init.c)
 

modules/rostests/apitests/gdi32/StretchBlt.c

@@ -0,0 +1,108 @@
+/*
+ * PROJECT:     ReactOS API tests
+ * LICENSE:     GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
+ * PURPOSE:     Tests for the StretchBlt API
+ * COPYRIGHT:   Copyright 2020 Doug Lyons (douglyons at douglyons dot com)
+ *              Most Code copied and modified from Wine gdi32:bitmap test.
+ */
+
+#include <stdarg.h>
+#include <assert.h>
+#include <string.h>
+
+#include "ntstatus.h"
+#define WIN32_NO_STATUS
+#include "windef.h"
+#include "winbase.h"
+#include "winerror.h"
+#include "wingdi.h"
+#include "winuser.h"
+#include "wine/test.h"
+
+static void test_StretchBlt(void)
+{
+    HBITMAP bmpDst, bmpSrc;
+    HDC hdcDst, hdcSrc;
+    UINT32 *dstBuffer, *srcBuffer;
+    BITMAPINFO biDst, biSrc;
+    UINT32 expected[256];
+
+    memset(&biDst, 0, sizeof(BITMAPINFO));
+
+    biDst.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+    biDst.bmiHeader.biWidth = 2;
+    biDst.bmiHeader.biHeight = 2;    // Set our Height to positive so we are bottom-up
+    biDst.bmiHeader.biPlanes = 1;
+    biDst.bmiHeader.biBitCount = 32; // Set our BitCount to 32 which is Full Color
+    biDst.bmiHeader.biCompression = BI_RGB;
+
+    memcpy(&biSrc, &biDst, sizeof(BITMAPINFO)); // Put same Destination params into the Source
+
+    hdcDst = CreateCompatibleDC(0);
+    hdcSrc = CreateCompatibleDC(0);
+
+    bmpSrc = CreateDIBSection(hdcSrc, &biSrc, DIB_RGB_COLORS, (void**)&srcBuffer, NULL, 0);
+    SelectObject(hdcSrc, bmpSrc);
+    bmpDst = CreateDIBSection(hdcDst, &biDst, DIB_RGB_COLORS, (void**)&dstBuffer, NULL, 0);
+    SelectObject(hdcDst, bmpDst);
+
+    srcBuffer[0] = 0x000000FF; // BLUE - stored beginning bottom left
+    srcBuffer[1] = 0x0000FF00; // GREEN
+    srcBuffer[2] = 0x00FF0000; // RED
+    srcBuffer[3] = 0xFF000000; // BLACK - 0xFF for alpha channel is easy to recognize when printed in hex format
+
+    /* Flip Left to Right on Source */
+    StretchBlt(hdcDst, 0, 0, 2, 2, hdcSrc, 1, 0, -2, 2, SRCCOPY);
+    expected[0] = 0x0000FF00;
+    expected[1] = 0x000000FF;
+    expected[2] = 0xFF000000;
+    expected[3] = 0x00FF0000;
+
+    ok(expected[1] == dstBuffer[1], "StretchBlt expected { %08X } got { %08X }\n",
+        expected[1], dstBuffer[1]);
+
+    ok(expected[3] == dstBuffer[3], "StretchBlt expected { %08X } got { %08X }\n",
+        expected[3], dstBuffer[3]);
+
+    /* Flip Top to Bottom on Source */
+    StretchBlt(hdcDst, 0, 0, 2, 2, hdcSrc, 0, 1, 2, -2, SRCCOPY);
+    expected[0] = 0x00FF0000;
+    expected[1] = 0xFF000000;
+    expected[2] = 0x000000FF;
+    expected[3] = 0x0000FF00;
+
+    ok(expected[0] == dstBuffer[0], "StretchBlt expected { %08X } got { %08X }\n",
+        expected[0], dstBuffer[0]);
+
+    ok(expected[1] == dstBuffer[1], "StretchBlt expected { %08X } got { %08X }\n",
+        expected[1], dstBuffer[1]);
+
+    /* Flip Left to Right and Top to Bottom on Source */
+    StretchBlt(hdcDst, 0, 0, 2, 2, hdcSrc, 1, 1, -2, -2, SRCCOPY);
+    expected[0] = 0xFF000000;
+    expected[1] = 0x00FF0000;
+    expected[2] = 0x0000FF00;
+    expected[3] = 0x000000FF;
+
+    ok(expected[1] == dstBuffer[1], "StretchBlt expected { %08X } got { %08X }\n",
+        expected[1], dstBuffer[1]);
+
+    /* Flip Left to Right and Top to Bottom on both Source and Destination */
+    StretchBlt(hdcDst, 1, 1, -2, -2, hdcSrc, 1, 1, -2, -2, SRCCOPY);
+    expected[0] = 0xFF000000;
+    expected[1] = 0x00FF0000;
+    expected[2] = 0x00FF0000;
+    expected[3] = 0x000000FF;
+
+    ok(expected[1] == dstBuffer[1], "StretchBlt expected { %08X } got { %08X }\n",
+        expected[1], dstBuffer[1]);
+
+    DeleteDC(hdcSrc);
+    DeleteDC(hdcDst);
+}
+
+
+START_TEST(StretchBlt)
+{
+    test_StretchBlt();
+}

modules/rostests/apitests/gdi32/testlist.c

@@ -75,6 +75,7 @@ extern void func_SetPixel(void);
 extern void func_SetSysColors(void);
 extern void func_SetWindowExtEx(void);
 extern void func_SetWorldTransform(void);
+extern void func_StretchBlt(void);
 extern void func_TextTransform(void);
 
 const struct test winetest_testlist[] =
@@ -151,6 +152,7 @@ const struct test winetest_testlist[] =
     { "SetSysColors", func_SetSysColors },
     { "SetWindowExtEx", func_SetWindowExtEx },
     { "SetWorldTransform", func_SetWorldTransform },
+    { "StretchBlt", func_StretchBlt },
     { "TextTransform", func_TextTransform },
 
     { 0, 0 }