Currently Apple provides functions to access data in font tables, like CTFontCopyTable. I'm using it to parse information (kerning, etc) out of a font when available. Is there any similar way of pulling the same data on Windows per font?
I can see a lot of documentation on the windows side when it comes to these font tables, but I can't seem to find a way to pull this data per font.
Here is how I'm pulling the data in osx:
CTFontRef lCTFont = CTFontCreateWithName((CFStringRef)lNSFontName, 800.0f, NULL);
CFDataRef lKernTable = CTFontCopyTable(lCTFont, kCTFontTableKern, kCTFontTableOptionNoOptions);
CFDataRef lGPOSTable = CTFontCopyTable(lCTFont, kCTFontTableGPOS, kCTFontTableOptionNoOptions);
GetFontData will get the raw table data, but as other suggestions advise, you will probably want to use the system-provided text layout methods rather than trying to roll your own.
You can use GetKerningPairs to get kerning data and GetCharacterPlacement to get GPOS data.
If your real intent is to simply render some text correctly though, you might want to use Uniscribe instead.
Related
First time poster; long time admirer of the Stack Overflow angels.
I'm having an issue with colors in span text that are controlled by Pango.
Long Version:
I'm updating an old UI program which has C++ code guts with GTK, XML (written by Glade), and an RC stylesheet handling the graphics. Some of our colored markup text is hard-coded in the XML. Some of it is dynamically set in the C++ code.
The problem is, that when the program runs on our older systems, the color referenced by span text as 'green' shows up as #00FF00. On our newer systems, 'green' is showing up as #008000.
Example of code printing to a label widget:
gtk_label_set_markup((GtkLabel *) TitleBarLabel, "<span color='green'>Orbital Cannon Positioning</span>");
I'm fairly certain that Pango is in control of the span text markup. I found that the difference between the greens is exactly the difference between X11 and W3C color lists (https://en.wikipedia.org/wiki/X11_color_names#Clashes_between_web_and_X11_colors).
It seems that our old systems are using X11 and our new ones are using W3C, which makes sense.
I could just replace all instances of 'green' with '#00FF00' but if we wanted to change the colors in the future, we'd have to go through the whole thing again. I'd much rather have the colors changeable through a stylesheet instead of baked into the code.
C++ Code:
GtkWidget * TitleBarLabel;
TitleBarLabel = GTK_WIDGET (get_builder_object (builder, "TitleBarLabel"));
gtk_label_set_markup((GtkLabel *) TitleBarLabel, "<span color='#00FF00'>Death Ray Power Status</span>");
I can create a GdkColor at run-time and gdk_color_parse it with values from a config file, and then use gtk_widget_modify_text() to apply the color to the label widgets. But then that doesn't work for all of the hard-coded span text in the XML. Also, we have pleanty of labels with bits of text colored differently inside the same line.
C++ Code:
GdkColor pass_color;
gdk_color_parse("#00FF00", &pass_color);
gtk_widget_modify_text(TitleBarLabel, GTK_STATE_NORMAL, &pass_color);
I can make a style in my RC file for each color and link every single label that would use that color at run-time. But we'd have to remove all markup coloring and add lots of code for grabbing widgets that we never bothered with before and code for setting names of widgets instead of just printing to them with new span text. It gets the desired result of having the colors changeable in a stylesheet but it's a massive undertaking and it's not intuitive for our veteran engineers who are used to using the color attributes.
RC File:
style "pass_color"
{
fg[NORMAL] = #00FF00
}
widget "*TitleBarLabel_Pass" style "pass_color"
C++ Code:
gtk_widget_set_name(TitleBarLabel, "TitleBarLabel_Pass");
Short Version:
Ideally, I would like to be able to make a new color at run-time that we can link with span text in such faction:
<span color='MyNewColor'>Weather Manipulation Settings</span>
Or maybe even create a new tag that applies specific attributes, like:
<span><MyNewColor>Shark Tank pH Balance</MyNewColor></span>
But I doubt that's possible.
I tried playing around with pango_attr_type_register(), pango_attr_foreground_new(), and friends, but I couldn't figure out how attributes work of if they could even do what I thought they did. After much research, it looks like an 'attribute' is just a one-time setting on a single string of text. And not a new value that can be called in line with span text, as I hoped.
Is anything like this remotely possible without rebuilding all of Pango?
Is there a different work around that would get me a stylesheet like setup?
At this point, I'm open to suggestions.
Version Specs:
Computers showing green as #00FF00
OS: Linux Slackware 13.37 and below
GTK: 2.24.4
Pango: 1.28.4
Computers showing green as #008000
OS: Linux Slackware 14.1
GTK: 2.24.20
Pango: 1.34.1
If you are able to use GTK 3.x, I would suggest doing that, where this is much easier to do using CSS. There is even a way to use multiple CSS styles for different regions in the same label, though it is awkward.
In GTK 2, as you noted, you can reference widgets by their name property in your RC file:
widget "shark-tank-ph-label" style "green-text"
style "green-text" {
text[NORMAL] = #008000
}
I would recommend taking this approach even if it's not what you're used to. Refactoring once to remove the hardcoded colors from your labels will make it much easier the next time you have to change something like this, and will also make your code closer to how things would work in GTK 3.x should you decide to make a port in the future.
How to set color to the card object?
There is some information about which are the support html tags, however i don´t know how to use it.
Card m_InstructionCard new Card(this);
String texto = getString(R.string.instruction_card_text);
m_InstructionCard.setText(Html.fromHtml(texto));
m_InstructionCard.setTimestamp(R.string.instruction_card_info);
m_InstructionCard.addImage(R.drawable.second_capture);
The function setText don´t support spanned.
Should I use style? There is some example of how do it?
As i can´t use card with resource xml, i don´t know how to do it.
The Card.setText method currently only supports unstyled Strings. Please file an enhancement request on our issue tracker if you would like to see other features.
In my C++ app I'm embedding (via COM) a web browser (Internet Explorer) control (CLSID_WebBrowser).
I can display my own html in that control by using IHTMLDocument2::write() method but if the html has <img src="foo.png"> element, it's not displayed.
I assume there is a way for me to provide the data for foo.png somehow to the web control, but I can't find the right place to hook this functionality?
I need to be in full control of providing the content of foo.png, so work-arounds like using res:// protocol or saving to disk and using file:// protocol are not good enough. I just want to plug my code somehow so that when embedded CLSID_WebBrowser control sees <img src="foo.png"> in html data given with IHTMLDocument2::write() it will ask me to provide this data.
To answer my own question, the solution that finally worked for me is:
register custom IInternetProtocol/IInternetProtocolInfo/ via custom IClassFactory given to IInternetSession::RegisterNameSpace(). For reasons that seem like a bug to me, it has to be a protocol already known to IE (I've chosen "its") even though it would be much better if it was my own, unique namespace.
feed html data via custom IMoniker through IPersistentMoniker::Load() and make sure that IMoniker::GetDisplayName() (which is a base url according to which relative links in provided html will be resolved) starts with that protocol scheme (in my case "its://"). That way relative link "foo.png" in the html data will be its://foo.png to IE which will make urlmon call IInternetProtocol::Start() and IInternetProtocol::Read() to ask for the data for that url.
This is all rather complicated, you can look at the actual (BSD-licensed) code here:
http://code.google.com/p/sumatrapdf/source/browse/trunk/src/utils/HtmlWindow.cpp
You can embed a small webserver such as mongoose and reference those impage from there.
In mongoose, you can attach callback to specific path, thus returning images from C++ code.
We use this for our debugging tools, where each images is accessible from a web interface
The easiest solution would be a Data URI. You'd inline out the image directly with IHTMLDocument2::write().
am working on a project using django as the framework.i need to take input as in a location name from a text box, and submitting which should zoom that particular location in the google maps.can anyone please help me by sharing a helpful link to the information i require or any code snippets for the same.
There are several ways to go about this. You can use the official Google Maps API but that will also give you a dynamic map, with controls and a details bubble. Here is my solution. It gives you a map as a static image.
img style="border: thin black solid;
"src="http://maps.googleapis.com/maps/api/staticmap?
center=***(Your '+' Separated Address)***&
size=***(HxW)***&maptype=roadmap &
markers=:http://i3.ghimg.com/img/smallMapPinHover_20110214.png***(Your + Separated Address)*** &
sensor=false"
alt="Your map"/>
I know that's pretty huge but it's not actually that complicated if you read it carefully.
Replace the (Your + Separated Address) with your the address you want (eg center=123+Main+St+Orlando+FL)
replace (HxW) with the size you want the map to be (eg size=124x124)
The reason you have to put the address in there twice is once for the map location, and once for the pin location. You can also change "maptype=roadmap" to other things like satellite.
I hope that wasn't too confusing. Good luck!
This has been driving me crazy all day.
I need to get a font filename (eg. Arial.ttf) based on its name (Arial in this case) and whether it is bold, italic or both. Using those pieces of information, I need to find the font file so I can use it for rendering.
Some more examples:
Calibri, Bold would resolve to calibrib.ttf.
Calibri, Italic would resolve to calibrii.ttf.
Any ideas on how I could achieve this in C++ (Win32)
First, to my knowledge, there is no reliable way to do that.
The Windows API deals with font families and mappings, not with font files, which are dealt with at a lower level. Also note that even if you manage to get the file name of a font, no rendering function (that I know of) will accept it, so what will you do with it?
That said, you can look in the registry key HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Fonts in order to obtain the file name of a font from its logical name. An implementation of that solution can be found here.
Related to the earlier posts, this seems to be a reliable way:
1) Read the registered Windows font list from
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Fonts\
You will obtain file names and alternate file paths here.
The Font names are not useful as they can change with user's locale.
2) Load the TrueType files (.ttf, .ttc, .otf):
Use FreeType https://www.freetype.org/). Just initialize the freetype library and load face with FT_New_Face(library, path, 0, &face).
3) Obtain the font Family name using FreeType.
Use FT_Get_Sfnt_Name_Count() and FT_Get_Sfnt_Name() to obtain the string table.
You will need to check if the encoding is Ansi, UTF16 or other, as some strings will be in multiple different languages and encodings.
4) Obtain the OS2 TrueType properties.
Use (TT_OS2 *) FT_Get_Sfnt_Table (face, ft_sfnt_os2) to get the OS2 structure.
Interpret the structure using docs like https://www.microsoft.com/typography/otspec/os2.htm#fc
5) Now you have font file path, family name, style properties and other information. Build a list of these and function to search for a file based on font family and style.
This Code Project project does what you want. As-is it fails on Windows 7 because the GetWinVer function stops at XP. It is trivial to add the case for Windows 7.
You normally do this by calling CreateFontIndirect and then getting the system to render. Perhaps you could explain why you can't use this standard approach.
One solution would be to access the font files and extract the name from the name table to create your own lookup (an STL map would be a simple way of doing that). Details of the TTF file format can be found here.