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iOS: Get CoreText text rendering backend closer to matching FreeType output

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UnknownShadow200 2022-08-20 23:14:20 +10:00
parent 224df71aac
commit 4bf0cda6e2
1 changed files with 30 additions and 29 deletions
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59
src/interop_ios.m
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@ -766,7 +766,7 @@ void interop_SysFontFree(void* handle) {
CFBridgingRelease(handle); CFBridgingRelease(handle);
} }
int interop_SysTextWidth(struct DrawTextArgs* args) { static NSMutableAttributedString* GetAttributedString(struct DrawTextArgs* args, cc_bool shadow) {
UIFont* font = (__bridge UIFont*)args->font->handle; UIFont* font = (__bridge UIFont*)args->font->handle;
cc_string left = args->text, part; cc_string left = args->text, part;
char colorCode = 'f'; char colorCode = 'f';
@ -774,53 +774,54 @@ int interop_SysTextWidth(struct DrawTextArgs* args) {
while (Drawer2D_UNSAFE_NextPart(&left, &part, &colorCode)) while (Drawer2D_UNSAFE_NextPart(&left, &part, &colorCode))
{ {
BitmapCol color = Drawer2D_GetColor(colorCode); BitmapCol color = Drawer2D_GetColor(colorCode);
NSString* bit = ToNSString(&part); if (shadow) color = GetShadowColor(color);
NSDictionary* attrs =
@{ NSString* bit = ToNSString(&part);
NSFontAttributeName : font, NSRange range = NSMakeRange(str.length, bit.length);
NSForegroundColorAttributeName : ToUIColor(color, 1.0f) [str.mutableString appendString:bit];
};
NSAttributedString* attr_bit = [[NSAttributedString alloc] initWithString:bit attributes:attrs]; [str addAttribute:NSFontAttributeName value:font range:range];
[str appendAttributedString:attr_bit]; [str addAttribute:NSForegroundColorAttributeName value:ToUIColor(color, 1.0f) range:range];
if (args->font->flags & FONT_FLAGS_UNDERLINE) {
NSNumber* style = [NSNumber numberWithInt:kCTUnderlineStyleSingle];
[str addAttribute:NSUnderlineStyleAttributeName value:style range:range];
}
} }
return str;
}
int interop_SysTextWidth(struct DrawTextArgs* args) {
NSMutableAttributedString* str = GetAttributedString(args, false);
CTLineRef line = CTLineCreateWithAttributedString((CFAttributedStringRef)str); CTLineRef line = CTLineCreateWithAttributedString((CFAttributedStringRef)str);
CGRect bounds = CTLineGetImageBounds(line, NULL); CGRect bounds = CTLineGetImageBounds(line, NULL);
CGFloat ascent, descent, leading; CGFloat ascent, descent, leading;
double width = CTLineGetTypographicBounds(line, &ascent, &descent, &leading); double width = CTLineGetTypographicBounds(line, &ascent, &descent, &leading);
CFRelease(line);
return Math_Ceil(width); return Math_Ceil(width);
} }
void interop_SysTextDraw(struct DrawTextArgs* args, struct Context2D* ctx, int x, int y, cc_bool shadow) { void interop_SysTextDraw(struct DrawTextArgs* args, struct Context2D* ctx, int x, int y, cc_bool shadow) {
UIFont* font = (__bridge UIFont*)args->font->handle; UIFont* font = (__bridge UIFont*)args->font->handle;
cc_string left = args->text, part; NSMutableAttributedString* str = GetAttributedString(args, shadow);
char colorCode = 'f';
NSMutableAttributedString* str = [[NSMutableAttributedString alloc] init];
while (Drawer2D_UNSAFE_NextPart(&left, &part, &colorCode)) float X = x, Y = y;
{ if (shadow) { X += 1.3f; Y -= 1.3f; }
BitmapCol color = Drawer2D_GetColor(colorCode);
NSString* bit = ToNSString(&part);
NSDictionary* attrs =
@{
NSFontAttributeName : font,
NSForegroundColorAttributeName : ToUIColor(color, 1.0f)
};
NSAttributedString* attr_bit = [[NSAttributedString alloc] initWithString:bit attributes:attrs];
[str appendAttributedString:attr_bit];
}
if (shadow) return;
CTLineRef line = CTLineCreateWithAttributedString((CFAttributedStringRef)str); CTLineRef line = CTLineCreateWithAttributedString((CFAttributedStringRef)str);
struct Bitmap* bmp = &ctx->bmp; struct Bitmap* bmp = &ctx->bmp;
CGContextRef cg_ctx = CGBitmapContextCreate(bmp->scan0, bmp->width, ctx->height, 8, bmp->width * 4, CGContextRef cg_ctx = CGBitmapContextCreate(bmp->scan0, bmp->width, ctx->height, 8, bmp->width * 4,
CGColorSpaceCreateDeviceRGB(), kCGBitmapByteOrder32Host | kCGImageAlphaNoneSkipFirst); CGColorSpaceCreateDeviceRGB(), kCGBitmapByteOrder32Host | kCGImageAlphaNoneSkipFirst);
CGContextSetTextPosition(cg_ctx, x, y); CGContextSetTextPosition(cg_ctx, X, Y - font.descender);
CTLineDraw(line, cg_ctx); CTLineDraw(line, cg_ctx);
CGContextRelease(cg_ctx); CGContextRelease(cg_ctx);
CFRelease(line);
} }
#endif #endif