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added intelligent scaling of icons -- cutting empty borders so that the icon is not too small

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5603 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Václav Slavík 2000-01-23 01:03:30 +00:00
parent cc638fc6ad
commit 78316bbe35
1 changed files with 50 additions and 3 deletions
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53
src/generic/filedlgg.cpp
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@ -156,11 +156,57 @@ static wxBitmap CreateAntialiasedBitmap(const wxImage& img)
}
p1 += 32 * 3, p2 += 32 * 3;
}
return small.ConvertToBitmap();
}
// finds empty borders and return non-empty area of image:
static wxImage CutEmptyBorders(const wxImage& img)
{
unsigned char mr = img.GetMaskRed(),
mg = img.GetMaskGreen(),
mb = img.GetMaskBlue();
unsigned char *dt = img.GetData(), *dttmp;
unsigned w = img.GetWidth(), h = img.GetHeight();
unsigned top, bottom, left, right, i;
bool empt;
#define MK_DTTMP(x,y) dttmp = dt + ((x + y * w) * 3)
#define NOEMPTY_PIX(empt) if (dttmp[0] != mr || dttmp[1] != mg || dttmp[2] != mb) {empt = FALSE; break;}
for (empt = TRUE, top = 0; empt && top < h; top++)
{
MK_DTTMP(0, top);
for (i = 0; i < w; i++, dttmp+=3)
NOEMPTY_PIX(empt)
}
for (empt = TRUE, bottom = h-1; empt && bottom > top; bottom--)
{
MK_DTTMP(0, bottom);
for (i = 0; i < w; i++, dttmp+=3)
NOEMPTY_PIX(empt)
}
for (empt = TRUE, left = 0; empt && left < w; left++)
{
MK_DTTMP(left, 0);
for (i = 0; i < h; i++, dttmp+=3*w)
NOEMPTY_PIX(empt)
}
for (empt = TRUE, right = w-1; empt && right > left; right--)
{
MK_DTTMP(right, 0);
for (i = 0; i < h; i++, dttmp+=3*w)
NOEMPTY_PIX(empt)
}
top--, left--, bottom++, right++;
return img.GetSubImage(wxRect(left, top, right - left + 1, bottom - top + 1));
}
int wxFileIconsTable::GetIconID(const wxString& extension, const wxString& mime)
{
if (!extension.IsEmpty())
@ -188,8 +234,9 @@ int wxFileIconsTable::GetIconID(const wxString& extension, const wxString& mime)
else
{
if (img.GetWidth() != 32 || img.GetHeight() != 32)
img.Rescale(32, 32);
m_ImageList.Add(CreateAntialiasedBitmap(img));
m_ImageList.Add(CreateAntialiasedBitmap(CutEmptyBorders(img).Rescale(32, 32)));
else
m_ImageList.Add(CreateAntialiasedBitmap(img));
}
m_HashTable.Put(extension, new wxFileIconEntry(id));
return id;