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https://github.com/holub/mame
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font_windows.c: don't crash if no memory for bitmap [Peter Ferrie]
more graceful exit will occur when next malloc() fails, and condition might be temporary
This commit is contained in:
Peter Ferrie
parent
490ed5ce9b
commit
9cf8308096
@ -169,90 +169,95 @@ bool osd_font_windows::get_bitmap(unicode_char chnum, bitmap_argb32 &bitmap, INT
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// create a DIB to render to
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// create a DIB to render to
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BYTE *bits;
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BYTE *bits;
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HBITMAP dib = CreateDIBSection(dummyDC, &info, DIB_RGB_COLORS, reinterpret_cast<VOID **>(&bits), NULL, 0);
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HBITMAP dib = CreateDIBSection(dummyDC, &info, DIB_RGB_COLORS, reinterpret_cast<VOID **>(&bits), NULL, 0);
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HGDIOBJ oldbitmap = SelectObject(dummyDC, dib);
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// clear the bitmap
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if (dib)
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int rowbytes = bmwidth / 8;
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memset(bits, 0, rowbytes * bmheight);
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// now draw the character
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WCHAR tempchar = chnum;
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SetTextColor(dummyDC, RGB(0xff, 0xff, 0xff));
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SetBkColor(dummyDC, RGB(0x00, 0x00, 0x00));
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ExtTextOutW(dummyDC, 50 + abc.abcA, 50, ETO_OPAQUE, NULL, &tempchar, 1, NULL);
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// characters are expected to be full-height
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rectangle actbounds;
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actbounds.min_y = 50;
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actbounds.max_y = 50 + metrics.tmHeight - 1;
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// determine the actual left of the character
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for (actbounds.min_x = 0; actbounds.min_x < rowbytes; actbounds.min_x++)
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{
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{
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BYTE *offs = bits + actbounds.min_x;
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HGDIOBJ oldbitmap = SelectObject(dummyDC, dib);
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UINT8 summary = 0;
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for (int y = 0; y < bmheight; y++)
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summary |= offs[y * rowbytes];
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if (summary != 0)
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{
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actbounds.min_x *= 8;
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if (!(summary & 0x80)) actbounds.min_x++;
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if (!(summary & 0xc0)) actbounds.min_x++;
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if (!(summary & 0xe0)) actbounds.min_x++;
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if (!(summary & 0xf0)) actbounds.min_x++;
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if (!(summary & 0xf8)) actbounds.min_x++;
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if (!(summary & 0xfc)) actbounds.min_x++;
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if (!(summary & 0xfe)) actbounds.min_x++;
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break;
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}
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}
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// determine the actual right of the character
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// clear the bitmap
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for (actbounds.max_x = rowbytes - 1; actbounds.max_x >= 0; actbounds.max_x--)
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int rowbytes = bmwidth / 8;
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{
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memset(bits, 0, rowbytes * bmheight);
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BYTE *offs = bits + actbounds.max_x;
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UINT8 summary = 0;
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for (int y = 0; y < bmheight; y++)
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summary |= offs[y * rowbytes];
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if (summary != 0)
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{
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actbounds.max_x *= 8;
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if (summary & 0x7f) actbounds.max_x++;
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if (summary & 0x3f) actbounds.max_x++;
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if (summary & 0x1f) actbounds.max_x++;
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if (summary & 0x0f) actbounds.max_x++;
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if (summary & 0x07) actbounds.max_x++;
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if (summary & 0x03) actbounds.max_x++;
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if (summary & 0x01) actbounds.max_x++;
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break;
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}
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}
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// allocate a new bitmap
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// now draw the character
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if (actbounds.max_x >= actbounds.min_x && actbounds.max_y >= actbounds.min_y)
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WCHAR tempchar = chnum;
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{
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SetTextColor(dummyDC, RGB(0xff, 0xff, 0xff));
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bitmap.allocate(actbounds.max_x + 1 - actbounds.min_x, actbounds.max_y + 1 - actbounds.min_y);
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SetBkColor(dummyDC, RGB(0x00, 0x00, 0x00));
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ExtTextOutW(dummyDC, 50 + abc.abcA, 50, ETO_OPAQUE, NULL, &tempchar, 1, NULL);
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// copy the bits into it
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// characters are expected to be full-height
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for (int y = 0; y < bitmap.height(); y++)
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rectangle actbounds;
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actbounds.min_y = 50;
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actbounds.max_y = 50 + metrics.tmHeight - 1;
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// determine the actual left of the character
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for (actbounds.min_x = 0; actbounds.min_x < rowbytes; actbounds.min_x++)
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{
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{
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UINT32 *dstrow = &bitmap.pix32(y);
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BYTE *offs = bits + actbounds.min_x;
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UINT8 *srcrow = &bits[(y + actbounds.min_y) * rowbytes];
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UINT8 summary = 0;
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for (int x = 0; x < bitmap.width(); x++)
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for (int y = 0; y < bmheight; y++)
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summary |= offs[y * rowbytes];
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if (summary != 0)
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{
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{
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int effx = x + actbounds.min_x;
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actbounds.min_x *= 8;
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dstrow[x] = ((srcrow[effx / 8] << (effx % 8)) & 0x80) ? rgb_t(0xff, 0xff, 0xff, 0xff) : rgb_t(0x00, 0xff, 0xff, 0xff);
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if (!(summary & 0x80)) actbounds.min_x++;
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if (!(summary & 0xc0)) actbounds.min_x++;
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if (!(summary & 0xe0)) actbounds.min_x++;
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if (!(summary & 0xf0)) actbounds.min_x++;
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if (!(summary & 0xf8)) actbounds.min_x++;
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if (!(summary & 0xfc)) actbounds.min_x++;
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if (!(summary & 0xfe)) actbounds.min_x++;
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break;
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}
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}
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}
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}
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// set the final offset values
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// determine the actual right of the character
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xoffs = actbounds.min_x - (50 + abc.abcA);
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for (actbounds.max_x = rowbytes - 1; actbounds.max_x >= 0; actbounds.max_x--)
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yoffs = actbounds.max_y - (50 + metrics.tmAscent);
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{
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BYTE *offs = bits + actbounds.max_x;
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UINT8 summary = 0;
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for (int y = 0; y < bmheight; y++)
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summary |= offs[y * rowbytes];
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if (summary != 0)
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{
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actbounds.max_x *= 8;
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if (summary & 0x7f) actbounds.max_x++;
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if (summary & 0x3f) actbounds.max_x++;
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if (summary & 0x1f) actbounds.max_x++;
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if (summary & 0x0f) actbounds.max_x++;
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if (summary & 0x07) actbounds.max_x++;
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if (summary & 0x03) actbounds.max_x++;
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if (summary & 0x01) actbounds.max_x++;
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break;
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}
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}
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// allocate a new bitmap
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if (actbounds.max_x >= actbounds.min_x && actbounds.max_y >= actbounds.min_y)
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{
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bitmap.allocate(actbounds.max_x + 1 - actbounds.min_x, actbounds.max_y + 1 - actbounds.min_y);
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// copy the bits into it
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for (int y = 0; y < bitmap.height(); y++)
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{
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UINT32 *dstrow = &bitmap.pix32(y);
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UINT8 *srcrow = &bits[(y + actbounds.min_y) * rowbytes];
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for (int x = 0; x < bitmap.width(); x++)
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{
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int effx = x + actbounds.min_x;
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dstrow[x] = ((srcrow[effx / 8] << (effx % 8)) & 0x80) ? rgb_t(0xff, 0xff, 0xff, 0xff) : rgb_t(0x00, 0xff, 0xff, 0xff);
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}
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}
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// set the final offset values
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xoffs = actbounds.min_x - (50 + abc.abcA);
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yoffs = actbounds.max_y - (50 + metrics.tmAscent);
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}
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// de-select the font and release the DC
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SelectObject(dummyDC, oldbitmap);
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DeleteObject(dib);
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}
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}
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// de-select the font and release the DC
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SelectObject(dummyDC, oldbitmap);
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DeleteObject(dib);
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SelectObject(dummyDC, oldfont);
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SelectObject(dummyDC, oldfont);
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DeleteDC(dummyDC);
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DeleteDC(dummyDC);
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return bitmap.valid();
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return bitmap.valid();
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