MacCarbFont::~MacCarbFont()
{
// apple docs say we should dispose the layout first.
ATSUDisposeTextLayout(mLayout);
ATSUDisposeStyle(mStyle);
CGColorSpaceRelease(mColorSpace);
}
static
void CloseDemoWindow(
WindowRef windowRef )
{
WindowListItem *currentItem = gWindowList;
WindowListItem *previousItem = NULL;
DrawContextStruct *windowContext;
// search through the window list, looking for the windowRef
while( currentItem != NULL )
{
// check to see if the current item is the one that we're looking for
if ( currentItem->windowRef == windowRef )
{
// we've got a match, so set the previous item's next item pointer
// to the current item's next item pointer
if ( previousItem != NULL )
{
previousItem->nextItem = currentItem->nextItem;
}
else
{
gWindowList = currentItem->nextItem;
}
// free up the current item
free( currentItem );
break;
}
// move on to the next item
previousItem = currentItem;
currentItem = currentItem->nextItem;
}
// get the draw context struct from the window's refCon
windowContext = (DrawContextStruct *) GetWRefCon( windowRef );
// if we have a context, then we need to make sure to dispose of everything
// that's in the context before we free the context.
if ( windowContext != NULL )
{
// dispose of the text layout object
if ( windowContext->layoutObject != NULL )
{
verify_noerr(
ATSUDisposeTextLayout( windowContext->layoutObject ) );
}
// free the text buffer, if there is one
if( windowContext->textBuffer != NULL )
{
free( windowContext->textBuffer );
}
// free the context itself
free( windowContext );
}
}
QFontEngineMacMulti::~QFontEngineMacMulti()
{
ATSUDisposeTextLayout(textLayout);
ATSUDisposeStyle(style);
for (int i = 0; i < engines.count(); ++i) {
QFontEngineMac *fe = const_cast<QFontEngineMac *>(static_cast<const QFontEngineMac *>(engines.at(i)));
fe->multiEngine = 0;
if (!fe->ref.deref())
delete fe;
}
engines.clear();
}
extern
OSStatus InvalidateAndRedrawWindows( void )
{
OSStatus err = noErr;
WindowListItem *currentItem = gWindowList;
DrawContextStruct *windowContext;
// search through the window list
while( currentItem != NULL )
{
// get the draw context struct from the window's refCon
windowContext = (DrawContextStruct *) GetWRefCon(
currentItem->windowRef );
// make sure that we have a context
if ( windowContext != NULL )
{
// if we have a text layout, then make sure that we get rid of it.
// This really is invalidation!
if ( windowContext->layoutObject != NULL )
{
err = ATSUDisposeTextLayout( windowContext->layoutObject );
require_noerr( err, InvalidateAndRedrawWindows_err );
windowContext->layoutObject = NULL;
}
// nifty. Now, we need to redraw the window
HIViewSetNeedsDisplay( ((DrawContextStruct*)GetWRefCon(currentItem->windowRef))->viewRef, true);
}
// grab the next context
currentItem = currentItem->nextItem;
}
InvalidateAndRedrawWindows_err:
return err;
}
// This example is almost identical to the helloworld example, except that
// in this case, there are two styles instead of just one. ATSUSetRunStyle
// is used to apply a style to different parts of the text.
//
void DrawMultipleStylesContents(WindowRef window)
{
CFStringRef string;
UniChar *text;
UniCharCount length;
UniCharArrayOffset currentStart, currentEnd;
ATSUStyle style1, style2;
ATSUTextLayout layout;
ATSUFontID font;
Fixed pointSize;
ATSUAttributeTag tags[2];
ByteCount sizes[2];
ATSUAttributeValuePtr values[2];
Fixed lineWidth, ascent, descent;
CGContextRef cgContext;
float x, y, cgY, windowHeight;
ItemCount numSoftBreaks;
UniCharArrayOffset *theSoftBreaks;
int i;
GrafPtr port, savedPort;
Rect portBounds;
// Set up the graphics port
port = GetWindowPort(window);
GetPort(&savedPort);
SetPort(port);
GetPortBounds(port, &portBounds);
EraseRect(&portBounds);
// Create a style object. This is one of two objects necessary to draw using ATSUI.
// (The layout is the other.)
verify_noerr( ATSUCreateStyle(&style1) );
// Look up the font we are going to use, and set it in the style object, using
// the aforementioned "triple" (tag, size, value) semantics. This is how almost
// all settings in ATSUI are applied.
verify_noerr( ATSUFindFontFromName(kMultipleStylesFontName, strlen(kMultipleStylesFontName), kFontFullName, kFontNoPlatform, kFontNoScript, kFontNoLanguage, &font) );
tags[0] = kATSUFontTag;
sizes[0] = sizeof(ATSUFontID);
values[0] = &font;
verify_noerr( ATSUSetAttributes(style1, 1, tags, sizes, values) );
// Set the point size, also using a triple. You can actually set multiple triples at once,
// since the tag, size, and value parameters are arrays. Other examples do this, such as
// the vertical text example.
//
pointSize = Long2Fix(kMultipleStylesFontSize);
tags[0] = kATSUSizeTag;
sizes[0] = sizeof(Fixed);
values[0] = &pointSize;
verify_noerr( ATSUSetAttributes(style1, 1, tags, sizes, values) );
// Now we create the second of two objects necessary to draw text using ATSUI, the layout.
// You can specify a pointer to the text buffer at layout creation time, or later using
// the routine ATSUSetTextPointerLocation(). Below, we do it after layout creation time.
verify_noerr( ATSUCreateTextLayout(&layout) );
// Before assigning text to the layout, we must first convert the string we plan to draw
// from a CFStringRef into an array of UniChar.
string = CFStringCreateWithCString(NULL, "In this example, various parts of the text have different styles applied. The same style is used more than once.", kCFStringEncodingASCII);
// Extract the raw Unicode from the CFString, then dispose of the CFString
length = CFStringGetLength(string);
text = (UniChar *)malloc(length * sizeof(UniChar));
CFStringGetCharacters(string, CFRangeMake(0, length), text);
CFRelease(string);
// Attach the resulting UTF-16 Unicode text to the layout
verify_noerr( ATSUSetTextPointerLocation(layout, text, kATSUFromTextBeginning, kATSUToTextEnd, length) );
// Now we tie the two necessary objects, the layout and the style, together
verify_noerr( ATSUSetRunStyle(layout, style1, kATSUFromTextBeginning, kATSUToTextEnd) );
// Now, for this example we create a second style, and assign it to various runs within
// the text. For our example, the run offsets are hard-coded for simplicity's sake. In
// a real application, style runs are often assigned from external sources, such as user
// selection.
verify_noerr( ATSUCreateAndCopyStyle(style1, &style2) );
// Change the font for the second style
verify_noerr( ATSUFindFontFromName(kMultipleStylesFontName2, strlen(kMultipleStylesFontName2), kFontFullName, kFontNoPlatform, kFontNoScript, kFontNoLanguage, &font) );
tags[0] = kATSUFontTag;
sizes[0] = sizeof(ATSUFontID);
values[0] = &font;
verify_noerr( ATSUSetAttributes(style2, 1, tags, sizes, values) );
// Apply the new style to the text in various places
verify_noerr( ATSUSetRunStyle(layout, style2, 8, 7) ); // The word "example"
verify_noerr( ATSUSetRunStyle(layout, style2, 65, 7) ); // The word "applied"
verify_noerr( ATSUSetRunStyle(layout, style2, 83, 5) ); // The word "style"
verify_noerr( ATSUSetRunStyle(layout, style2, 107, 4) ); // The word "once"
// In this example, we are breaking text into lines.
// Therefore, we need to know the width of the line.
lineWidth = X2Fix(portBounds.right - portBounds.left - 2.0*kMultipleStylesMargin);
tags[0] = kATSULineWidthTag;
sizes[0] = sizeof(Fixed);
values[0] = &lineWidth;
verify_noerr( ATSUSetLayoutControls(layout, 1, tags, sizes, values) );
// Prepare the CGContext for drawing
QDBeginCGContext(port, &cgContext);
tags[0] = kATSUCGContextTag;
sizes[0] = sizeof(CGContextRef);
values[0] = &cgContext;
verify_noerr( ATSUSetLayoutControls(layout, 1, tags, sizes, values) );
// Prepare the coordinates for drawing. In our example, "x" and "y" are the coordinates
// in QD space. "cgY" contains the y coordinate in CG space.
//
windowHeight = portBounds.bottom - portBounds.top;
x = kMultipleStylesMargin; // leave a small left margin
y = kMultipleStylesMargin; // leave a small top margin
cgY = windowHeight - y; // Subtract the y coordinate from the height of the
// window to get the coordinate in CG-aware space.
// Break the text into lines
verify_noerr( ATSUBatchBreakLines(layout, kATSUFromTextBeginning, length, lineWidth, &numSoftBreaks) );
verify_noerr( ATSUGetSoftLineBreaks(layout, kATSUFromTextBeginning, kATSUToTextEnd, 0, NULL, &numSoftBreaks) );
theSoftBreaks = (UniCharArrayOffset *) malloc(numSoftBreaks * sizeof(UniCharArrayOffset));
verify_noerr( ATSUGetSoftLineBreaks(layout, kATSUFromTextBeginning, kATSUToTextEnd, numSoftBreaks, theSoftBreaks, &numSoftBreaks) );
// Loop over all the lines and draw them
currentStart = 0;
for (i=0; i <= numSoftBreaks; i++) {
currentEnd = ((numSoftBreaks > 0 ) && (numSoftBreaks > i)) ? theSoftBreaks[i] : length;
// This is the height of a line, the ascent and descent. Getting the values this way is the preferred method.
ATSUGetLineControl(layout, currentStart, kATSULineAscentTag, sizeof(ATSUTextMeasurement), &ascent, NULL);
ATSUGetLineControl(layout, currentStart, kATSULineDescentTag, sizeof(ATSUTextMeasurement), &descent, NULL);
// Make room for the area above the baseline
y += Fix2X(ascent);
cgY = windowHeight - y;
// Draw the text
verify_noerr( ATSUDrawText(layout, currentStart, currentEnd - currentStart, X2Fix(x), X2Fix(cgY)) );
// Make room for the area beloww the baseline
y += Fix2X(descent);
// Prepare for next line
currentStart = currentEnd;
}
// This is a one-shot window, so we are now ready to dispose of all our objects.
// Normally, we would want to keep everything around in case we needed to redraw or change
// the text at some point.
// Tear down the CGContext
CGContextFlush(cgContext);
QDEndCGContext(port, &cgContext);
// Deallocate string storage
free(text);
// Layout and styles also need to be disposed
verify_noerr( ATSUDisposeStyle(style1) );
verify_noerr( ATSUDisposeStyle(style2) );
verify_noerr( ATSUDisposeTextLayout(layout) );
// Restore the graphics port
SetPort(savedPort);
}
PR_CALLBACK PRIntn ATSUILayoutCache::FreeHashEntries(PLHashEntry *he, PRIntn italic, void *arg)
{
delete (atsuiLayoutCacheKey*)he->key;
ATSUDisposeTextLayout((ATSUTextLayout)he->value);
return HT_ENUMERATE_REMOVE;
}
bool SetFallbackFont(FreeTypeSettings *settings, const char *language_isocode, int winlangid, MissingGlyphSearcher *callback)
{
const char *str;
bool result = false;
callback->FindMissingGlyphs(&str);
#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
if (MacOSVersionIsAtLeast(10, 5, 0)) {
/* Determine fallback font using CoreText. This uses the language isocode
* to find a suitable font. CoreText is available from 10.5 onwards. */
char lang[16];
if (strcmp(language_isocode, "zh_TW") == 0) {
/* Traditional Chinese */
strecpy(lang, "zh-Hant", lastof(lang));
} else if (strcmp(language_isocode, "zh_CN") == 0) {
/* Simplified Chinese */
strecpy(lang, "zh-Hans", lastof(lang));
} else if (strncmp(language_isocode, "ur", 2) == 0) {
/* The urdu alphabet is variant of persian. As OS X has no default
* font that advertises an urdu language code, search for persian
* support instead. */
strecpy(lang, "fa", lastof(lang));
} else {
/* Just copy the first part of the isocode. */
strecpy(lang, language_isocode, lastof(lang));
char *sep = strchr(lang, '_');
if (sep != NULL) *sep = '\0';
}
CFStringRef lang_code;
lang_code = CFStringCreateWithCString(kCFAllocatorDefault, lang, kCFStringEncodingUTF8);
/* Create a font iterator and iterate over all fonts that
* are available to the application. */
ATSFontIterator itr;
ATSFontRef font;
ATSFontIteratorCreate(kATSFontContextLocal, NULL, NULL, kATSOptionFlagsUnRestrictedScope, &itr);
while (!result && ATSFontIteratorNext(itr, &font) == noErr) {
/* Get CoreText font handle. */
CTFontRef font_ref = CTFontCreateWithPlatformFont(font, 0.0, NULL, NULL);
CFArrayRef langs = CTFontCopySupportedLanguages(font_ref);
if (langs != NULL) {
/* Font has a list of supported languages. */
for (CFIndex i = 0; i < CFArrayGetCount(langs); i++) {
CFStringRef lang = (CFStringRef)CFArrayGetValueAtIndex(langs, i);
if (CFStringCompare(lang, lang_code, kCFCompareAnchored) == kCFCompareEqualTo) {
/* Lang code is supported by font, get full font name. */
CFStringRef font_name = CTFontCopyFullName(font_ref);
char name[128];
CFStringGetCString(font_name, name, lengthof(name), kCFStringEncodingUTF8);
CFRelease(font_name);
/* Skip some inappropriate or ugly looking fonts that have better alternatives. */
if (strncmp(name, "Courier", 7) == 0 || strncmp(name, "Apple Symbols", 13) == 0 ||
strncmp(name, ".Aqua", 5) == 0 || strncmp(name, "LastResort", 10) == 0 ||
strncmp(name, "GB18030 Bitmap", 14) == 0) continue;
/* Save result. */
callback->SetFontNames(settings, name);
DEBUG(freetype, 2, "CT-Font for %s: %s", language_isocode, name);
result = true;
break;
}
}
CFRelease(langs);
}
CFRelease(font_ref);
}
ATSFontIteratorRelease(&itr);
CFRelease(lang_code);
} else
#endif
{
#if (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5) && !__LP64__
/* Determine fallback font using ATSUI. This uses a string sample with
* missing characters. This is not failure-proof, but a better way like
* using the isocode as in the CoreText code path is not available.
* ATSUI was deprecated with 10.6 and is only partially available in
* 64-bit mode. */
/* Remove all control characters in the range from SCC_CONTROL_START to
* SCC_CONTROL_END as well as all ASCII < 0x20 from the string as it will
* mess with the automatic font detection */
char buff[256]; // This length is enough to find a suitable replacement font
strecpy(buff, str, lastof(buff));
str_validate(buff, lastof(buff), SVS_ALLOW_NEWLINE);
/* Extract a UniChar representation of the sample string. */
CFStringRef cf_str = CFStringCreateWithCString(kCFAllocatorDefault, buff, kCFStringEncodingUTF8);
if (cf_str == NULL) {
/* Something went wrong. Corrupt/invalid sample string? */
return false;
}
CFIndex str_len = CFStringGetLength(cf_str);
UniChar string[str_len];
CFStringGetCharacters(cf_str, CFRangeMake(0, str_len), string);
/* Create a default text style with the default font. */
ATSUStyle style;
ATSUCreateStyle(&style);
/* Create a text layout object from the sample string using the text style. */
UniCharCount run_len = kATSUToTextEnd;
ATSUTextLayout text_layout;
ATSUCreateTextLayoutWithTextPtr(string, kATSUFromTextBeginning, kATSUToTextEnd, str_len, 1, &run_len, &style, &text_layout);
/* Try to match a font for the sample text. ATSUMatchFontsToText stops after
* it finds the first continuous character run not renderable with the currently
* selected font starting at offset. The matching needs to be repeated until
* the end of the string is reached to make sure the fallback font matches for
* all characters in the string and not only the first run. */
UniCharArrayOffset offset = kATSUFromTextBeginning;
OSStatus os_err;
do {
ATSUFontID font;
UniCharCount run_len;
os_err = ATSUMatchFontsToText(text_layout, offset, kATSUToTextEnd, &font, &offset, &run_len);
if (os_err == kATSUFontsMatched) {
/* Found a better fallback font. Update the text layout
* object with the new font. */
ATSUAttributeTag tag = kATSUFontTag;
ByteCount size = sizeof(font);
ATSUAttributeValuePtr val = &font;
ATSUSetAttributes(style, 1, &tag, &size, &val);
offset += run_len;
}
/* Exit if the end of the string is reached or some other error occurred. */
} while (os_err == kATSUFontsMatched && offset < (UniCharArrayOffset)str_len);
if (os_err == noErr || os_err == kATSUFontsMatched) {
/* ATSUMatchFontsToText exited normally. Extract font
* out of the text layout object. */
ATSUFontID font;
ByteCount act_len;
ATSUGetAttribute(style, kATSUFontTag, sizeof(font), &font, &act_len);
/* Get unique font name. The result is not a c-string, we have
* to leave space for a \0 and terminate it ourselves. */
char name[128];
ATSUFindFontName(font, kFontUniqueName, kFontNoPlatformCode, kFontNoScriptCode, kFontNoLanguageCode, 127, name, &act_len, NULL);
name[act_len > 127 ? 127 : act_len] = '\0';
/* Save Result. */
callback->SetFontNames(settings, name);
DEBUG(freetype, 2, "ATSUI-Font for %s: %s", language_isocode, name);
result = true;
}
ATSUDisposeTextLayout(text_layout);
ATSUDisposeStyle(style);
CFRelease(cf_str);
#endif
}
if (result && strncmp(settings->medium.font, "Geeza Pro", 9) == 0) {
/* The font 'Geeza Pro' is often found for arabic characters, but
* it has the 'tiny' problem of not having any latin characters.
* 'Arial Unicode MS' on the other hand has arabic and latin glyphs,
* but seems to 'forget' to inform the OS about this fact. Manually
* substitute the latter for the former if it is loadable. */
bool ft_init = _library != NULL;
FT_Face face;
/* Init FreeType if needed. */
if ((ft_init || FT_Init_FreeType(&_library) == FT_Err_Ok) && GetFontByFaceName("Arial Unicode MS", &face) == FT_Err_Ok) {
FT_Done_Face(face);
callback->SetFontNames(settings, "Arial Unicode MS");
DEBUG(freetype, 1, "Replacing font 'Geeza Pro' with 'Arial Unicode MS'");
}
if (!ft_init) {
/* Uninit FreeType if we did the init. */
FT_Done_FreeType(_library);
_library = NULL;
}
}
callback->FindMissingGlyphs(NULL);
return result;
}
void Text::calculate_position_and_advance_cursor(TextWriter &tw, int *out_x, int *out_y) const
{
#ifdef WIN32
const long options = DT_LEFT | DT_NOPREFIX;
Context c = tw.renderer.m_context;
int previous_map_mode = SetMapMode(c, MM_TEXT);
HFONT font = font_handle_lookup[tw.size];
// Create the font we want to use, and swap it out with
// whatever is currently in there, along with our color
HFONT previous_font = (HFONT)SelectObject(c, font);
// Call DrawText to find out how large our text is
RECT drawing_rect = { tw.x, tw.y, 0, 0 };
tw.last_line_height = DrawText(c, m_text.c_str(), int(m_text.length()), &drawing_rect, options | DT_CALCRECT);
// Return the hdc settings to their previous setting
SelectObject(c, previous_font);
SetMapMode(c, previous_map_mode);
#else
// Convert passed-in text to Unicode
CFStringRef cftext = MacStringFromWide(m_text, true).get();
CFDataRef unitext = CFStringCreateExternalRepresentation(kCFAllocatorDefault, cftext, kCFStringEncodingUnicode, 0);
if (!unitext) throw PianoGameError(WSTRING(L"Couldn't convert string to unicode: '" << m_text << L"'"));
CFRelease(cftext);
// Create an ATSU layout
ATSUTextLayout layout;
const UniCharCount run_length = kATSUToTextEnd;
OSStatus status = ATSUCreateTextLayoutWithTextPtr((ConstUniCharArrayPtr)CFDataGetBytePtr(unitext), kATSUFromTextBeginning, kATSUToTextEnd, CFDataGetLength(unitext) / 2, 1, &run_length, &atsu_style_lookup[tw.size], &layout);
if (status != noErr) throw PianoGameError(WSTRING(L"Couldn't create ATSU text layout for string: '" << m_text << L"', Error code: " << static_cast<int>(status)));
// Measure the size of the resulting text
Rect drawing_rect = { 0, 0, 0, 0 };
ATSUTextMeasurement before = 0;
ATSUTextMeasurement after = 0;
ATSUTextMeasurement ascent = 0;
ATSUTextMeasurement descent = 0;
status = ATSUGetUnjustifiedBounds(layout, 0, kATSUToTextEnd, &before, &after, &ascent, &descent);
if (status != noErr) throw PianoGameError(WSTRING(L"Couldn't get unjustified bounds for text layout for string: '" << m_text << L"', Error code: " << static_cast<int>(status)));
// NOTE: the +1 here is completely arbitrary and seemed to place the text better.
// It may just be a difference between the Windows and Mac text placement systems.
drawing_rect.top += tw.y + 1;
drawing_rect.left += tw.x + FixRound(before);
drawing_rect.right += tw.x + FixRound(after);
// Not used.
drawing_rect.bottom = 0;
// Clean-up
ATSUDisposeTextLayout(layout);
CFRelease(unitext);
#endif
// Update the text-writer with post-draw coordinates
if (tw.centered) drawing_rect.left -= (drawing_rect.right - drawing_rect.left) / 2;
if (!tw.centered) tw.x += drawing_rect.right - drawing_rect.left;
// Tell the draw function where to put the text
*out_x = drawing_rect.left;
*out_y = drawing_rect.top;
}
static cairo_status_t
_cairo_atsui_font_text_to_glyphs(void *abstract_font,
const char *utf8,
cairo_glyph_t **glyphs,
int *num_glyphs)
{
cairo_atsui_font_t *font = abstract_font;
size_t i;
OSStatus err;
ATSUTextLayout textLayout;
ATSLayoutRecord *layoutRecords;
ItemCount glyphCount;
int charCount;
UniChar *theText;
cairo_status_t status;
// liberal estimate of size
charCount = strlen(utf8);
if (charCount == 0) {
*glyphs = NULL;
*num_glyphs = 0;
return CAIRO_STATUS_SUCCESS;
}
status = _cairo_utf8_to_utf16 (utf8, -1, &theText, &charCount);
if (status)
return status;
err = ATSUCreateTextLayout(&textLayout);
err = ATSUSetTextPointerLocation(textLayout,
theText, 0, charCount, charCount);
// Set the style for all of the text
err = ATSUSetRunStyle(textLayout,
font->unscaled_style, kATSUFromTextBeginning, kATSUToTextEnd);
// Get the glyphs from the text layout object
err = ATSUDirectGetLayoutDataArrayPtrFromTextLayout(textLayout,
0,
kATSUDirectDataLayoutRecordATSLayoutRecordCurrent,
(void *)
&layoutRecords,
&glyphCount);
*num_glyphs = glyphCount - 1;
*glyphs =
(cairo_glyph_t *) malloc(*num_glyphs * (sizeof(cairo_glyph_t)));
if (*glyphs == NULL) {
return CAIRO_STATUS_NO_MEMORY;
}
for (i = 0; i < *num_glyphs; i++) {
(*glyphs)[i].index = layoutRecords[i].glyphID;
(*glyphs)[i].x = FixedToFloat(layoutRecords[i].realPos);
(*glyphs)[i].y = 0;
}
free(theText);
ATSUDirectReleaseLayoutDataArrayPtr(NULL,
kATSUDirectDataLayoutRecordATSLayoutRecordCurrent,
(void *) &layoutRecords);
ATSUDisposeTextLayout(textLayout);
return CAIRO_STATUS_SUCCESS;
}
OSStatus ATSUDisposeTextLayout_wrap(ATSUTextLayout lay) {
void* oText;
OSStatus e = ATSUGetTextLocation(lay, &oText, NULL, NULL, NULL, NULL);
if (!e) FreeHeap(oText);
return ATSUDisposeTextLayout(lay);
}
static
OSStatus DrawLayoutForStyleAndRunInfo(
ATSUStyle styleArray[],
ItemCount styleArraySize,
ATSUStyleRunInfo styleRunArray[],
ItemCount styleRunArraySize,
UniChar *stringPtr,
UniCharCount stringLen,
CGContextRef cgContext,
Fixed currentXPos,
Fixed *currentYPos )
{
OSStatus err;
ATSUStyle *seperateStyles = NULL;
UniCharCount *seperateRunLengths = NULL;
ItemCount numberOfRuns = 0;
ATSUAttributeTag attrTag;
ByteCount attrSize;
ATSUAttributeValuePtr attrPtr;
ATSUTextLayout newLayout;
// check to see if we have a style array
if ( styleArray != NULL )
{
// if the styleRunArray is NULL, then there is only one run
if ( styleRunArray == NULL )
{
numberOfRuns = 1;
seperateStyles = styleArray;
seperateRunLengths = &stringLen;
}
else
{
ItemCount i;
// the number of runs is equal to the number of runs passed in
numberOfRuns = styleRunArraySize;
// allocate a seperateStyles and seperateRuns array
seperateStyles = (ATSUStyle *) malloc( sizeof( ATSUStyle ) *
numberOfRuns );
require_action( seperateStyles != NULL,
CreateLayoutForStyleAndRunInfo_err, err = memFullErr );
seperateRunLengths = (UniCharCount *) malloc( sizeof( UniCharCount ) *
numberOfRuns );
require_action( seperateRunLengths != NULL,
CreateLayoutForStyleAndRunInfo_err, err = memFullErr );
// loop through and assign the runs to the seperate arrays. I'm not
// sure that this is the best way to do this. Perhaps it's best to
// simply create the layout and assign the style runs to it individually.
for ( i = 0; i < numberOfRuns; i++ )
{
seperateStyles[i] = styleArray[styleRunArray[i].styleObjectIndex];
seperateRunLengths[i] = styleRunArray[i].runLength;
}
}
}
// first of all, create the layout with the text information passed in
err = ATSUCreateTextLayoutWithTextPtr( stringPtr, kATSUFromTextBeginning,
kATSUToTextEnd, stringLen, numberOfRuns, seperateRunLengths, seperateStyles,
&newLayout );
require_noerr( err, CreateLayoutForStyleAndRunInfo_err );
// if we've got a layout, then assign the CGContext to it
attrTag = kATSUCGContextTag;
attrSize = sizeof( CGContextRef );
attrPtr = &cgContext;
err = ATSUSetLayoutControls( newLayout, 1, &attrTag, &attrSize, &attrPtr );
require_noerr( err, CreateLayoutForStyleAndRunInfoLayout_err );
// set the Y position before we draw
err = SetYPositionForLineHeight( newLayout, currentYPos );
require_noerr( err, CreateLayoutForStyleAndRunInfoLayout_err );
// do some drawin'
err = ATSUDrawText( newLayout, kATSUFromTextBeginning, kATSUToTextEnd,
currentXPos, *currentYPos );
require_noerr( err, CreateLayoutForStyleAndRunInfoLayout_err );
CreateLayoutForStyleAndRunInfoLayout_err:
ATSUDisposeTextLayout( newLayout );
CreateLayoutForStyleAndRunInfo_err:
if ( ( styleRunArray != NULL ) && ( styleArray != NULL ) )
{
if ( seperateStyles != NULL )
{
free( seperateStyles );
}
if ( seperateRunLengths != NULL );
{
free( seperateRunLengths );
}
}
return err;
}