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When creating DIBs with a color depth <= 8, always set biClrUsed field

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to the number of entries in the color table.
This commit is contained in:
Peter Beutner 2005-11-14 15:10:23 +00:00 committed by Alexandre Julliard
parent deaae4b8d1
commit c9e02e117f
2 changed files with 31 additions and 0 deletions
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4
dlls/gdi/dib.c
View File

@ -1180,6 +1180,10 @@ HBITMAP DIB_CreateDIBSection(HDC hdc, const BITMAPINFO *bmi, UINT usage,
dib->dsBmih.biSize = sizeof(BITMAPINFOHEADER);
}
/* set number of entries in bmi.bmiColors table */
if( bpp <= 8 )
dib->dsBmih.biClrUsed = 1 << bpp;
/* only use sizeImage if it's valid and we're dealing with a compressed bitmap */
if (sizeImage && (compression == BI_RLE4 || compression == BI_RLE8))
dib->dsBmih.biSizeImage = sizeImage;

27
dlls/gdi/tests/bitmap.c
View File

@ -194,6 +194,7 @@ static void test_dibsections(void)
WORD *index;
DWORD *bits32;
HPALETTE hpal, oldpal;
DIBSECTION dibsec;
COLORREF c0, c1;
int i;
int screen_depth;
@ -216,6 +217,9 @@ static void test_dibsections(void)
hdib = CreateDIBSection(hdc, pbmi, DIB_RGB_COLORS, (void**)&bits, NULL, 0);
ok(hdib != NULL, "CreateDIBSection failed\n");
ok(GetObject(hdib, sizeof(DIBSECTION), &dibsec) != 0, "GetObject failed for DIBSection\n");
ok(dibsec.dsBmih.biClrUsed == 2,
"created DIBSection: wrong biClrUsed field: %lu, should be: %u\n", dibsec.dsBmih.biClrUsed, 2);
/* Test if the old BITMAPCOREINFO structure is supported */
@ -280,6 +284,19 @@ static void test_dibsections(void)
SelectObject(hdcmem, oldbm);
DeleteObject(hdib);
pbmi->bmiHeader.biBitCount = 4;
for (i = 0; i < 16; i++) {
pbmi->bmiColors[i].rgbRed = i;
pbmi->bmiColors[i].rgbGreen = 16-i;
pbmi->bmiColors[i].rgbBlue = 0;
}
hdib = CreateDIBSection(hdcmem, pbmi, DIB_RGB_COLORS, (void**)&bits, NULL, 0);
ok(hdib != NULL, "CreateDIBSection failed\n");
ok(GetObject(hdib, sizeof(DIBSECTION), &dibsec) != 0, "GetObject failed for DIB Section\n");
ok(dibsec.dsBmih.biClrUsed == 16,
"created DIBSection: wrong biClrUsed field: %lu, should be: %u\n", dibsec.dsBmih.biClrUsed, 16);
DeleteObject(hdib);
pbmi->bmiHeader.biBitCount = 8;
for (i = 0; i < 128; i++) {
@ -292,6 +309,10 @@ static void test_dibsections(void)
}
hdib = CreateDIBSection(hdcmem, pbmi, DIB_RGB_COLORS, (void**)&bits, NULL, 0);
ok(hdib != NULL, "CreateDIBSection failed\n");
ok(GetObject(hdib, sizeof(DIBSECTION), &dibsec) != 0, "GetObject failed for DIB Section\n");
ok(dibsec.dsBmih.biClrUsed == 256,
"created DIBSection: wrong biClrUsed field: %lu, should be: %u\n", dibsec.dsBmih.biClrUsed, 256);
oldbm = SelectObject(hdcmem, hdib);
for (i = 0; i < 256; i++) {
@ -322,6 +343,9 @@ static void test_dibsections(void)
oldpal = SelectPalette(hdc, hpal, TRUE);
hdib = CreateDIBSection(hdc, pbmi, DIB_PAL_COLORS, (void**)&bits, NULL, 0);
ok(hdib != NULL, "CreateDIBSection failed\n");
ok(GetObject(hdib, sizeof(DIBSECTION), &dibsec) != 0, "GetObject failed for DIB Section\n");
ok(dibsec.dsBmih.biClrUsed == 2,
"created DIBSection: wrong biClrUsed field: %lu, should be: %u\n", dibsec.dsBmih.biClrUsed, 2);
/* The colour table has already been grabbed from the dc, so we select back the
old palette */
@ -409,6 +433,9 @@ static void test_dibsections(void)
oldpal = SelectPalette(hdc, hpal, TRUE);
hdib = CreateDIBSection(hdc, pbmi, DIB_PAL_COLORS, (void**)&bits, NULL, 0);
ok(hdib != NULL, "CreateDIBSection failed\n");
ok(GetObject(hdib, sizeof(DIBSECTION), &dibsec) != 0, "GetObject failed for DIB Section\n");
ok(dibsec.dsBmih.biClrUsed == 256,
"created DIBSection: wrong biClrUsed field: %lu, should be: %u\n", dibsec.dsBmih.biClrUsed, 256);
SelectPalette(hdc, oldpal, TRUE);
oldbm = SelectObject(hdcmem, hdib);