[PATCH] gdi32/tests: Reserve sufficient room for DIB data.

[Jeff Smith]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=48054
Signed-off-by: Jeff Smith 
---
 dlls/gdi32/tests/bitmap.c | 41 ++++++++++++++++++++++-----------------
 1 file changed, 23 insertions(+), 18 deletions(-)

diff --git a/dlls/gdi32/tests/bitmap.c b/dlls/gdi32/tests/bitmap.c
index 8fe160546c..dea7c3d9db 100644
--- a/dlls/gdi32/tests/bitmap.c
+++ b/dlls/gdi32/tests/bitmap.c
@@ -910,10 +910,15 @@ static void test_dibsections(void)
     ReleaseDC(0, hdc);
 }

+#define DATA_WIDTH 2
+#define DATA_HEIGHT 2
+#define MAX_PLANES 64
+#define MAX_BPP 64
+
 static void test_dib_formats(void)
 {
     BITMAPINFO *bi;
-    char data[256];
+    char data[((DATA_WIDTH * MAX_BPP + 31) / 32) * 4 * DATA_HEIGHT * MAX_PLANES];
     void *bits;
     int planes, bpp, compr, format;
     HBITMAP hdib, hbmp;
@@ -928,9 +933,9 @@ static void test_dib_formats(void)

memset( data, 0xaa, sizeof(data) );

-    for (bpp = 0; bpp <= 64; bpp++)
+    for (bpp = 0; bpp <= MAX_BPP; bpp++)
     {
-        for (planes = 0; planes <= 64; planes++)
+        for (planes = 0; planes <= MAX_PLANES; planes++)
         {
             for (compr = 0; compr < 8; compr++)
             {
@@ -949,8 +954,8 @@ static void test_dib_formats(void)

memset( bi, 0, sizeof(bi->bmiHeader) );
                     bi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
-                    bi->bmiHeader.biWidth = 2;
-                    bi->bmiHeader.biHeight = 2;
+                    bi->bmiHeader.biWidth = DATA_WIDTH;
+                    bi->bmiHeader.biHeight = DATA_HEIGHT;
                     bi->bmiHeader.biPlanes = planes;
                     bi->bmiHeader.biBitCount = bpp;
                     bi->bmiHeader.biCompression = compr;
@@ -969,8 +974,8 @@ static void test_dib_formats(void)
                     if (!planes) expect_ok = FALSE;
                     memset( bi, 0, sizeof(bi->bmiHeader) );
                     bi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
-                    bi->bmiHeader.biWidth = 2;
-                    bi->bmiHeader.biHeight = 2;
+                    bi->bmiHeader.biWidth = DATA_WIDTH;
+                    bi->bmiHeader.biHeight = DATA_HEIGHT;
                     bi->bmiHeader.biPlanes = planes;
                     bi->bmiHeader.biBitCount = bpp;
                     bi->bmiHeader.biCompression = compr;
@@ -1027,8 +1032,8 @@ static void test_dib_formats(void)
                         bpp, bi->bmiHeader.biBitCount );

bi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
-                    bi->bmiHeader.biWidth = 2;
-                    bi->bmiHeader.biHeight = 2;
+                    bi->bmiHeader.biWidth = DATA_WIDTH;
+                    bi->bmiHeader.biHeight = DATA_HEIGHT;
                     bi->bmiHeader.biPlanes = planes;
                     bi->bmiHeader.biBitCount = bpp;
                     bi->bmiHeader.biCompression = compr;
@@ -1067,8 +1072,8 @@ static void test_dib_formats(void)

memset( bi, 0, sizeof(bi->bmiHeader) );
     bi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
-    bi->bmiHeader.biWidth = 2;
-    bi->bmiHeader.biHeight = 2;
+    bi->bmiHeader.biWidth = DATA_WIDTH;
+    bi->bmiHeader.biHeight = DATA_HEIGHT;
     bi->bmiHeader.biPlanes = 1;
     bi->bmiHeader.biBitCount = 16;
     bi->bmiHeader.biCompression = BI_BITFIELDS;
@@ -1121,7 +1126,7 @@ static void test_dib_formats(void)
     ok( ret, "SetDIBits failed with bad bitfields\n" );

bi->bmiHeader.biWidth = -2;
-    bi->bmiHeader.biHeight = 2;
+    bi->bmiHeader.biHeight = DATA_HEIGHT;
     bi->bmiHeader.biBitCount = 32;
     bi->bmiHeader.biCompression = BI_RGB;
     hdib = CreateDIBSection(hdc, bi, DIB_RGB_COLORS, &bits, NULL, 0);
@@ -1144,7 +1149,7 @@ static void test_dib_formats(void)
     ok( !ret || broken(ret), /* nt4 */ "GetDIBits succeeded with negative width\n" );

bi->bmiHeader.biWidth = 0;
-    bi->bmiHeader.biHeight = 2;
+    bi->bmiHeader.biHeight = DATA_HEIGHT;
     bi->bmiHeader.biBitCount = 32;
     bi->bmiHeader.biCompression = BI_RGB;
     hdib = CreateDIBSection(hdc, bi, DIB_RGB_COLORS, &bits, NULL, 0);
@@ -1167,7 +1172,7 @@ static void test_dib_formats(void)
     ret = GetDIBits(hdc, hbmp, 0, 2, NULL, bi, DIB_RGB_COLORS);
     ok( !ret || broken(ret), /* nt4 */ "GetDIBits succeeded with zero width\n" );

-    bi->bmiHeader.biWidth = 2;
+    bi->bmiHeader.biWidth = DATA_WIDTH;
     bi->bmiHeader.biHeight = 0;
     bi->bmiHeader.biBitCount = 32;
     bi->bmiHeader.biCompression = BI_RGB;
@@ -1193,8 +1198,8 @@ static void test_dib_formats(void)

/* some functions accept DIB_PAL_COLORS+1, but not beyond */

-    bi->bmiHeader.biWidth = 2;
-    bi->bmiHeader.biHeight = 2;
+    bi->bmiHeader.biWidth = DATA_WIDTH;
+    bi->bmiHeader.biHeight = DATA_HEIGHT;
     bi->bmiHeader.biBitCount = 1;
     bi->bmiHeader.biCompression = BI_RGB;
     hdib = CreateDIBSection(hdc, bi, DIB_PAL_COLORS+1, &bits, NULL, 0);
@@ -1217,8 +1222,8 @@ static void test_dib_formats(void)
     ret = GetDIBits(hdc, hbmp, 0, 0, NULL, bi, DIB_PAL_COLORS+1);
     ok( !ret, "GetDIBits succeeded with DIB_PAL_COLORS+1\n" );

-    bi->bmiHeader.biWidth = 2;
-    bi->bmiHeader.biHeight = 2;
+    bi->bmiHeader.biWidth = DATA_WIDTH;
+    bi->bmiHeader.biHeight = DATA_HEIGHT;
     bi->bmiHeader.biBitCount = 1;
     bi->bmiHeader.biCompression = BI_RGB;
     hdib = CreateDIBSection(hdc, bi, DIB_PAL_COLORS+2, &bits, NULL, 0);

[Dmitry Timoshkov]

Jeff Smith  wrote:
> +#define DATA_WIDTH 2
> +#define DATA_HEIGHT 2
> +#define MAX_PLANES 64
> +#define MAX_BPP 64
> -
>
> static void test_dib_formats(void)
>  {
>      BITMAPINFO *bi;
> - char data[256];
> - char data[((DATA_WIDTH * MAX_BPP + 31) / 32) * 4 * DATA_HEIGHT * MAX_PLANES];

This makes the test absolutely unreadable. Just adding a comment around
char data[2544]; /* enough to hold DIB test data */
would be enough IMO.

[Francois Gouget]

On Fri, 22 Nov 2019, Jeff Smith wrote:
[...]
> +#define DATA_WIDTH 2
> +#define DATA_HEIGHT 2
> +#define MAX_PLANES 64
> +#define MAX_BPP 64
> -
>
> static void test_dib_formats(void)
>  {
>      BITMAPINFO *bi;
> - char data[256];
> - char data[((DATA_WIDTH * MAX_BPP + 31) / 32) * 4 * DATA_HEIGHT * MAX_PLANES];

If not using DATA_WIDTH & co, I use the literals here at least.
(probably won't help with the readability complaint but I'm not sure 
I agree with it)

[...]
> @@ -1121,7 +1126,7 @@ static void test_dib_formats(void)
>      ok( ret, "SetDIBits failed with bad bitfields\n" );
>  bi->bmiHeader.biWidth = -2;

Shouldn't that be -DATA_WIDTH?