--- /dev/null
+/* xscreensaver, Copyright (c) 1991-2016 Jamie Zawinski <jwz@jwz.org>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation. No representations are made about the suitability of this
+ * software for any purpose. It is provided "as is" without express or
+ * implied warranty.
+ */
+
+/* JWXYZ Is Not Xlib.
+
+ But it's a bunch of function definitions that bear some resemblance to
+ Xlib and that do Cocoa-ish things that bear some resemblance to the
+ things that Xlib might have done.
+
+ This is the original version of jwxyz for MacOS and iOS.
+ The version used by Android is in jwxyz-gl.c and jwxyz-common.c.
+ Both versions depend on jwxyz-cocoa.m.
+ */
+
+#ifdef JWXYZ_QUARTZ // entire file
+
+#import <stdlib.h>
+#import <stdint.h>
+#import <wchar.h>
+
+#ifdef USE_IPHONE
+# import <UIKit/UIKit.h>
+# import <UIKit/UIScreen.h>
+# import <QuartzCore/QuartzCore.h>
+# define NSView UIView
+# define NSRect CGRect
+# define NSPoint CGPoint
+# define NSSize CGSize
+# define NSColor UIColor
+# define NSImage UIImage
+# define NSEvent UIEvent
+# define NSFont UIFont
+# define NSGlyph CGGlyph
+# define NSWindow UIWindow
+# define NSMakeSize CGSizeMake
+# define NSBezierPath UIBezierPath
+# define colorWithDeviceRed colorWithRed
+
+# define NSFontTraitMask UIFontDescriptorSymbolicTraits
+// The values for the flags for NSFontTraitMask and
+// UIFontDescriptorSymbolicTraits match up, not that it really matters here.
+# define NSBoldFontMask UIFontDescriptorTraitBold
+# define NSFixedPitchFontMask UIFontDescriptorTraitMonoSpace
+# define NSItalicFontMask UIFontDescriptorTraitItalic
+#else
+# import <Cocoa/Cocoa.h>
+#endif
+
+#import <CoreText/CTFont.h>
+#import <CoreText/CTLine.h>
+#import <CoreText/CTRun.h>
+
+#import "jwxyzI.h"
+#import "jwxyz-cocoa.h"
+#import "jwxyz-timers.h"
+#import "yarandom.h"
+#import "utf8wc.h"
+#import "xft.h"
+
+# undef MAX
+# undef MIN
+# define MAX(a,b) ((a)>(b)?(a):(b))
+# define MIN(a,b) ((a)<(b)?(a):(b))
+
+
+struct jwxyz_Display {
+ Window main_window;
+ Screen *screen;
+ int screen_count;
+ struct jwxyz_sources_data *timers_data;
+
+# ifndef USE_IPHONE
+ CGDirectDisplayID cgdpy; /* ...of the one and only Window, main_window.
+ This can change if the window is dragged to
+ a different screen. */
+# endif
+
+ CGColorSpaceRef colorspace; /* Color space of this screen. We tag all of
+ our images with this to avoid translation
+ when rendering. */
+
+ unsigned long window_background;
+};
+
+struct jwxyz_Screen {
+ Display *dpy;
+ CGBitmapInfo bitmap_info;
+ unsigned long black, white;
+ Visual *visual;
+ int screen_number;
+};
+
+struct jwxyz_GC {
+ XGCValues gcv;
+ unsigned int depth;
+ CGImageRef clip_mask; // CGImage copy of the Pixmap in gcv.clip_mask
+};
+
+struct jwxyz_Font {
+ Display *dpy;
+ char *ps_name;
+ NSFont *nsfont;
+ float size; // points
+ char *xa_font;
+
+ // In X11, "Font" is just an ID, and "XFontStruct" contains the metrics.
+ // But we need the metrics on both of them, so they go here.
+ XFontStruct metrics;
+};
+
+struct jwxyz_XFontSet {
+ XFontStruct *font;
+};
+
+
+// 24/32bpp -> 32bpp image conversion.
+// Any of RGBA, BGRA, ABGR, or ARGB can be represented by a rotate of 0/8/16/24
+// bits and an optional byte order swap.
+
+// This type encodes such a conversion.
+typedef unsigned convert_mode_t;
+
+// It's rotate, then swap.
+// A rotation here shifts bytes forward in memory. On x86/ARM, that's a left
+// rotate, and on PowerPC, a rightward rotation.
+static const convert_mode_t CONVERT_MODE_ROTATE_MASK = 0x3;
+static const convert_mode_t CONVERT_MODE_SWAP = 0x4;
+
+
+// Converts an array of pixels ('src') from one format to another, placing the
+// result in 'dest', according to the pixel conversion mode 'mode'.
+static void
+convert_row (uint32_t *dest, const void *src, size_t count,
+ convert_mode_t mode, size_t src_bpp)
+{
+ Assert (src_bpp == 24 || src_bpp == 32, "weird bpp");
+
+ // This works OK iff src == dest or src and dest do not overlap.
+
+ if (!mode) {
+ if (src != dest)
+ memcpy (dest, src, count * 4);
+ return;
+ }
+
+ // This is correct, but not fast.
+ convert_mode_t rot = (mode & CONVERT_MODE_ROTATE_MASK) * 8;
+ convert_mode_t flip = mode & CONVERT_MODE_SWAP;
+
+ src_bpp /= 8;
+
+ uint32_t *dest_end = dest + count;
+ while (dest != dest_end) {
+ uint32_t x;
+
+ if (src_bpp == 4)
+ x = *(const uint32_t *)src;
+ else { // src_bpp == 3
+ const uint8_t *src8 = (const uint8_t *)src;
+ // __LITTLE/BIG_ENDIAN__ are defined by the compiler.
+# if defined __LITTLE_ENDIAN__
+ x = src8[0] | (src8[1] << 8) | (src8[2] << 16) | 0xff000000;
+# elif defined __BIG_ENDIAN__
+ x = (src8[0] << 24) | (src8[1] << 16) | (src8[2] << 8) | 0xff;
+# else
+# error "Can't determine system endianness."
+# endif
+ }
+
+ src = (const uint8_t *)src + src_bpp;
+
+ /* The naive (i.e. ubiquitous) portable implementation of bitwise rotation,
+ for 32-bit integers, is:
+
+ (x << rot) | (x >> (32 - rot))
+
+ This works nearly everywhere. Compilers on x86 wil generally recognize
+ the idiom and convert it to a ROL instruction. But there's a problem
+ here: according to the C specification, bit shifts greater than or equal
+ to the length of the integer are undefined. And if rot = 0:
+ 1. (x << 0) | (x >> (32 - 0))
+ 2. (x << 0) | (x >> 32)
+ 3. (x << 0) | (Undefined!)
+
+ Still, when the compiler converts this to a ROL on x86, everything works
+ as intended. But, there are two additional problems when Clang does
+ compile-time constant expression evaluation with the (x >> 32)
+ expression:
+ 1. Instead of evaluating it to something reasonable (either 0, like a
+ human would intuitively expect, or x, like x86 would with SHR), Clang
+ seems to pull a value out of nowhere, like -1, or some other random
+ number.
+ 2. Clang's warning for this, -Wshift-count-overflow, only works when the
+ shift count is a literal constant, as opposed to an arbitrary
+ expression that is optimized down to a constant.
+ Put together, this means that the assertions in jwxyz_make_display with
+ convert_px break with the above naive rotation, but only for a release
+ build.
+
+ http://blog.regehr.org/archives/1063
+ http://llvm.org/bugs/show_bug.cgi?id=17332
+ As described in those links, there is a solution here: Masking the
+ undefined shift with '& 31' as below makes the experesion well-defined
+ again. And LLVM is set to pick up on this safe version of the idiom and
+ use a rotation instruction on architectures (like x86) that support it,
+ just like it does with the unsafe version.
+
+ Too bad LLVM doesn't want to pick up on that particular optimization
+ here. Oh well. At least this code usually isn't critical w.r.t.
+ performance.
+ */
+
+# if defined __LITTLE_ENDIAN__
+ x = (x << rot) | (x >> ((32 - rot) & 31));
+# elif defined __BIG_ENDIAN__
+ x = (x >> rot) | (x << ((32 - rot) & 31));
+# endif
+
+ if (flip)
+ x = __builtin_bswap32(x); // LLVM/GCC built-in function.
+
+ *dest = x;
+ ++dest;
+ }
+}
+
+
+// Converts a single pixel.
+static uint32_t
+convert_px (uint32_t px, convert_mode_t mode)
+{
+ convert_row (&px, &px, 1, mode, 32);
+ return px;
+}
+
+
+// This returns the inverse conversion mode, such that:
+// pixel
+// == convert_px(convert_px(pixel, mode), convert_mode_invert(mode))
+// == convert_px(convert_px(pixel, convert_mode_invert(mode)), mode)
+static convert_mode_t
+convert_mode_invert (convert_mode_t mode)
+{
+ // swap(0); rot(n) == rot(n); swap(0)
+ // swap(1); rot(n) == rot(-n); swap(1)
+ return mode & CONVERT_MODE_SWAP ? mode : CONVERT_MODE_ROTATE_MASK & -mode;
+}
+
+
+// This combines two conversions into one, such that:
+// convert_px(convert_px(pixel, mode0), mode1)
+// == convert_px(pixel, convert_mode_merge(mode0, mode1))
+static convert_mode_t
+convert_mode_merge (convert_mode_t m0, convert_mode_t m1)
+{
+ // rot(r0); swap(s0); rot(r1); swap(s1)
+ // rot(r0); rot(s0 ? -r1 : r1); swap(s0); swap(s1)
+ // rot(r0 + (s0 ? -r1 : r1)); swap(s0 + s1)
+ return
+ ((m0 + (m0 & CONVERT_MODE_SWAP ? -m1 : m1)) & CONVERT_MODE_ROTATE_MASK) |
+ ((m0 ^ m1) & CONVERT_MODE_SWAP);
+}
+
+
+// This returns a conversion mode that converts an arbitrary 32-bit format
+// specified by bitmap_info to RGBA.
+static convert_mode_t
+convert_mode_to_rgba (CGBitmapInfo bitmap_info)
+{
+ // Former default: kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Little
+ // i.e. BGRA
+ // red = 0x00FF0000;
+ // green = 0x0000FF00;
+ // blue = 0x000000FF;
+
+ // RGBA: kCGImageAlphaNoneSkipLast | kCGBitmapByteOrder32Big
+
+ CGImageAlphaInfo alpha_info =
+ (CGImageAlphaInfo)(bitmap_info & kCGBitmapAlphaInfoMask);
+
+ Assert (! (bitmap_info & kCGBitmapFloatComponents),
+ "kCGBitmapFloatComponents unsupported");
+ Assert (alpha_info != kCGImageAlphaOnly, "kCGImageAlphaOnly not supported");
+
+ convert_mode_t rot = alpha_info == kCGImageAlphaFirst ||
+ alpha_info == kCGImageAlphaPremultipliedFirst ||
+ alpha_info == kCGImageAlphaNoneSkipFirst ?
+ 3 : 0;
+
+ CGBitmapInfo byte_order = bitmap_info & kCGBitmapByteOrderMask;
+
+ Assert (byte_order == kCGBitmapByteOrder32Little ||
+ byte_order == kCGBitmapByteOrder32Big,
+ "byte order not supported");
+
+ convert_mode_t swap = byte_order == kCGBitmapByteOrder32Little ?
+ CONVERT_MODE_SWAP : 0;
+ if (swap)
+ rot = CONVERT_MODE_ROTATE_MASK & -rot;
+ return swap | rot;
+}
+
+
+union color_bytes
+{
+ uint32_t pixel;
+ uint8_t bytes[4];
+};
+
+
+uint32_t
+jwxyz_alloc_color (Display *dpy,
+ uint16_t r, uint16_t g, uint16_t b, uint16_t a)
+{
+ union color_bytes color;
+
+ /* Instead of (int)(c / 256.0), another possibility is
+ (int)(c * 255.0 / 65535.0 + 0.5). This can be calculated using only
+ uint8_t integer_math(uint16_t c) {
+ unsigned c0 = c + 128;
+ return (c0 - (c0 >> 8)) >> 8;
+ }
+ */
+
+ color.bytes[0] = r >> 8;
+ color.bytes[1] = g >> 8;
+ color.bytes[2] = b >> 8;
+ color.bytes[3] = a >> 8;
+
+ return
+ convert_px (color.pixel,
+ convert_mode_invert (convert_mode_to_rgba (dpy->screen->bitmap_info)));
+}
+
+
+void
+jwxyz_query_color (Display *dpy, unsigned long pixel, uint8_t *rgba)
+{
+ union color_bytes color;
+ color.pixel = convert_px ((uint32_t)pixel,
+ convert_mode_to_rgba (dpy->screen->bitmap_info));
+ for (unsigned i = 0; i != 4; ++i)
+ rgba[i] = color.bytes[i];
+}
+
+
+static void
+query_color_float (Display *dpy, unsigned long pixel, float *rgba)
+{
+ uint8_t rgba8[4];
+ jwxyz_query_color (dpy, pixel, rgba8);
+ for (unsigned i = 0; i != 4; ++i)
+ rgba[i] = rgba8[i] * (1.0f / 255.0f);
+}
+
+
+/* We keep a list of all of the Displays that have been created and not
+ yet freed so that they can have sensible display numbers. If three
+ displays are created (0, 1, 2) and then #1 is closed, then the fourth
+ display will be given the now-unused display number 1. (Everything in
+ here assumes a 1:1 Display/Screen mapping.)
+
+ The size of this array is the most number of live displays at one time.
+ So if it's 20, then we'll blow up if the system has 19 monitors and also
+ has System Preferences open (the small preview window).
+
+ Note that xlockmore-style savers tend to allocate big structures, so
+ setting this to 1000 will waste a few megabytes. Also some of them assume
+ that the number of screens never changes, so dynamically expanding this
+ array won't work.
+ */
+# ifndef USE_IPHONE
+static Display *jwxyz_live_displays[20] = { 0, };
+# endif
+
+
+Display *
+jwxyz_make_display (Window w)
+{
+ CGContextRef cgc = w->cgc;
+
+ Display *d = (Display *) calloc (1, sizeof(*d));
+ d->screen = (Screen *) calloc (1, sizeof(Screen));
+ d->screen->dpy = d;
+
+ d->screen_count = 1;
+ d->screen->screen_number = 0;
+# ifndef USE_IPHONE
+ {
+ // Find the first empty slot in live_displays and plug us in.
+ int size = sizeof(jwxyz_live_displays) / sizeof(*jwxyz_live_displays);
+ int i;
+ for (i = 0; i < size; i++) {
+ if (! jwxyz_live_displays[i])
+ break;
+ }
+ if (i >= size) abort();
+ jwxyz_live_displays[i] = d;
+ d->screen_count = size;
+ d->screen->screen_number = i;
+ }
+# endif // !USE_IPHONE
+
+ d->screen->bitmap_info = CGBitmapContextGetBitmapInfo (cgc);
+ d->screen->black = jwxyz_alloc_color (d, 0x0000, 0x0000, 0x0000, 0xFFFF);
+ d->screen->white = jwxyz_alloc_color (d, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF);
+
+# if 0
+ // Tests for the image conversion modes.
+ {
+ const uint32_t key = 0x04030201;
+# ifdef __LITTLE_ENDIAN__
+ assert (convert_px (key, 0) == key);
+ assert (convert_px (key, 1) == 0x03020104);
+ assert (convert_px (key, 3) == 0x01040302);
+ assert (convert_px (key, 4) == 0x01020304);
+ assert (convert_px (key, 5) == 0x04010203);
+# endif
+ for (unsigned i = 0; i != 8; ++i) {
+ assert (convert_px(convert_px(key, i), convert_mode_invert(i)) == key);
+ assert (convert_mode_invert(convert_mode_invert(i)) == i);
+ }
+
+ for (unsigned i = 0; i != 8; ++i) {
+ for (unsigned j = 0; j != 8; ++j)
+ assert (convert_px(convert_px(key, i), j) ==
+ convert_px(key, convert_mode_merge(i, j)));
+ }
+ }
+# endif
+
+ Visual *v = (Visual *) calloc (1, sizeof(Visual));
+ v->class = TrueColor;
+ v->red_mask = jwxyz_alloc_color (d, 0xFFFF, 0x0000, 0x0000, 0x0000);
+ v->green_mask = jwxyz_alloc_color (d, 0x0000, 0xFFFF, 0x0000, 0x0000);
+ v->blue_mask = jwxyz_alloc_color (d, 0x0000, 0x0000, 0xFFFF, 0x0000);
+ CGBitmapInfo byte_order = d->screen->bitmap_info & kCGBitmapByteOrderMask;
+ Assert ( ! (d->screen->bitmap_info & kCGBitmapFloatComponents) &&
+ (byte_order == kCGBitmapByteOrder32Little ||
+ byte_order == kCGBitmapByteOrder32Big),
+ "invalid bits per channel");
+ v->bits_per_rgb = 8;
+ d->screen->visual = v;
+
+ d->timers_data = jwxyz_sources_init (XtDisplayToApplicationContext (d));
+
+ d->window_background = BlackPixel(d,0);
+
+ d->main_window = w;
+
+ Assert (cgc, "no CGContext");
+ return d;
+}
+
+void
+jwxyz_free_display (Display *dpy)
+{
+ jwxyz_sources_free (dpy->timers_data);
+
+# ifndef USE_IPHONE
+ {
+ // Find us in live_displays and clear that slot.
+ int size = ScreenCount(dpy);
+ int i;
+ for (i = 0; i < size; i++) {
+ if (dpy == jwxyz_live_displays[i]) {
+ jwxyz_live_displays[i] = 0;
+ break;
+ }
+ }
+ if (i >= size) abort();
+ }
+# endif // !USE_IPHONE
+
+ free (dpy->screen->visual);
+ free (dpy->screen);
+ free (dpy);
+}
+
+
+/* Call this after any modification to the bits on a Pixmap or Window.
+ Most Pixmaps are used frequently as sources and infrequently as
+ destinations, so it pays to cache the data as a CGImage as needed.
+ */
+void
+invalidate_drawable_cache (Drawable d)
+{
+ if (d && d->cgi) {
+ CGImageRelease (d->cgi);
+ d->cgi = 0;
+ }
+}
+
+
+/* Call this when the View changes size or position.
+ */
+void
+jwxyz_window_resized (Display *dpy)
+{
+ Window w = dpy->main_window;
+
+# ifndef USE_IPHONE
+ // Figure out which screen the window is currently on.
+ {
+ int wx, wy;
+ XTranslateCoordinates (dpy, w, NULL, 0, 0, &wx, &wy, NULL);
+ CGPoint p;
+ p.x = wx;
+ p.y = wy;
+ CGDisplayCount n;
+ dpy->cgdpy = 0;
+ CGGetDisplaysWithPoint (p, 1, &dpy->cgdpy, &n);
+ // Auuugh!
+ if (! dpy->cgdpy) {
+ p.x = p.y = 0;
+ CGGetDisplaysWithPoint (p, 1, &dpy->cgdpy, &n);
+ }
+ Assert (dpy->cgdpy, "unable to find CGDisplay");
+ }
+# endif // USE_IPHONE
+
+/*
+ {
+ // Figure out this screen's colorspace, and use that for every CGImage.
+ //
+ CMProfileRef profile = 0;
+ CMGetProfileByAVID ((CMDisplayIDType) dpy->cgdpy, &profile);
+ Assert (profile, "unable to find colorspace profile");
+ dpy->colorspace = CGColorSpaceCreateWithPlatformColorSpace (profile);
+ Assert (dpy->colorspace, "unable to find colorspace");
+ }
+ */
+
+ // WTF? It's faster if we *do not* use the screen's colorspace!
+ //
+ dpy->colorspace = CGColorSpaceCreateDeviceRGB();
+
+ invalidate_drawable_cache (w);
+}
+
+
+void
+jwxyz_flush_context (Display *dpy)
+{
+ // CGContextSynchronize is another possibility.
+ CGContextFlush(dpy->main_window->cgc);
+}
+
+jwxyz_sources_data *
+display_sources_data (Display *dpy)
+{
+ return dpy->timers_data;
+}
+
+
+Window
+XRootWindow (Display *dpy, int screen)
+{
+ return dpy ? dpy->main_window : 0;
+}
+
+Screen *
+XDefaultScreenOfDisplay (Display *dpy)
+{
+ return dpy ? dpy->screen : 0;
+}
+
+Visual *
+XDefaultVisualOfScreen (Screen *screen)
+{
+ return screen ? screen->visual : 0;
+}
+
+Display *
+XDisplayOfScreen (Screen *s)
+{
+ return s ? s->dpy : 0;
+}
+
+int
+XDisplayNumberOfScreen (Screen *s)
+{
+ return 0;
+}
+
+int
+XScreenNumberOfScreen (Screen *s)
+{
+ return s? s->screen_number : 0;
+}
+
+int
+jwxyz_ScreenCount (Display *dpy)
+{
+ return dpy ? dpy->screen_count : 0;
+}
+
+unsigned long
+XBlackPixelOfScreen(Screen *screen)
+{
+ return screen->black;
+}
+
+unsigned long
+XWhitePixelOfScreen(Screen *screen)
+{
+ return screen->white;
+}
+
+unsigned long
+XCellsOfScreen(Screen *screen)
+{
+ Visual *v = screen->visual;
+ return v->red_mask | v->green_mask | v->blue_mask;
+}
+
+
+void
+set_color (Display *dpy, CGContextRef cgc, unsigned long argb,
+ unsigned int depth, Bool alpha_allowed_p, Bool fill_p)
+{
+ jwxyz_validate_pixel (dpy, argb, depth, alpha_allowed_p);
+ if (depth == 1) {
+ if (fill_p)
+ CGContextSetGrayFillColor (cgc, (argb ? 1.0 : 0.0), 1.0);
+ else
+ CGContextSetGrayStrokeColor (cgc, (argb ? 1.0 : 0.0), 1.0);
+ } else {
+ float rgba[4];
+ query_color_float (dpy, argb, rgba);
+ if (fill_p)
+ CGContextSetRGBFillColor (cgc, rgba[0], rgba[1], rgba[2], rgba[3]);
+ else
+ CGContextSetRGBStrokeColor (cgc, rgba[0], rgba[1], rgba[2], rgba[3]);
+ }
+}
+
+static void
+set_line_mode (CGContextRef cgc, XGCValues *gcv)
+{
+ CGContextSetLineWidth (cgc, gcv->line_width ? gcv->line_width : 1);
+ CGContextSetLineJoin (cgc,
+ gcv->join_style == JoinMiter ? kCGLineJoinMiter :
+ gcv->join_style == JoinRound ? kCGLineJoinRound :
+ kCGLineJoinBevel);
+ CGContextSetLineCap (cgc,
+ gcv->cap_style == CapNotLast ? kCGLineCapButt :
+ gcv->cap_style == CapButt ? kCGLineCapButt :
+ gcv->cap_style == CapRound ? kCGLineCapRound :
+ kCGLineCapSquare);
+}
+
+static void
+set_clip_mask (Drawable d, GC gc)
+{
+ Assert (!!gc->gcv.clip_mask == !!gc->clip_mask, "GC clip mask mixup");
+
+ Pixmap p = gc->gcv.clip_mask;
+ if (!p) return;
+ Assert (p->type == PIXMAP, "not a pixmap");
+
+ XRectangle wr = d->frame;
+ CGRect to;
+ to.origin.x = wr.x + gc->gcv.clip_x_origin;
+ to.origin.y = wr.y + wr.height - gc->gcv.clip_y_origin
+ - p->frame.height;
+ to.size.width = p->frame.width;
+ to.size.height = p->frame.height;
+
+ CGContextClipToMask (d->cgc, to, gc->clip_mask);
+}
+
+
+/* Pushes a GC context; sets BlendMode and ClipMask.
+ */
+void
+push_gc (Drawable d, GC gc)
+{
+ CGContextRef cgc = d->cgc;
+ CGContextSaveGState (cgc);
+
+ switch (gc->gcv.function) {
+ case GXset:
+ case GXclear:
+ case GXcopy:/*CGContextSetBlendMode (cgc, kCGBlendModeNormal);*/ break;
+ case GXxor: CGContextSetBlendMode (cgc, kCGBlendModeDifference); break;
+ case GXor: CGContextSetBlendMode (cgc, kCGBlendModeLighten); break;
+ case GXand: CGContextSetBlendMode (cgc, kCGBlendModeDarken); break;
+ default: Assert(0, "unknown gcv function"); break;
+ }
+
+ if (gc->gcv.clip_mask)
+ set_clip_mask (d, gc);
+}
+
+
+/* Pushes a GC context; sets BlendMode, ClipMask, Fill, and Stroke colors.
+ */
+void
+push_color_gc (Display *dpy, Drawable d, GC gc, unsigned long color,
+ Bool antialias_p, Bool fill_p)
+{
+ push_gc (d, gc);
+
+ int depth = gc->depth;
+ switch (gc->gcv.function) {
+ case GXset: color = (depth == 1 ? 1 : WhitePixel(dpy,0)); break;
+ case GXclear: color = (depth == 1 ? 0 : BlackPixel(dpy,0)); break;
+ }
+
+ CGContextRef cgc = d->cgc;
+ set_color (dpy, cgc, color, depth, gc->gcv.alpha_allowed_p, fill_p);
+ CGContextSetShouldAntialias (cgc, antialias_p);
+}
+
+
+/* Pushes a GC context; sets Fill and Stroke colors to the foreground color.
+ */
+static void
+push_fg_gc (Display *dpy, Drawable d, GC gc, Bool fill_p)
+{
+ push_color_gc (dpy, d, gc, gc->gcv.foreground, gc->gcv.antialias_p, fill_p);
+}
+
+static Bool
+bitmap_context_p (Drawable d)
+{
+ return True;
+}
+
+
+
+/* You've got to be fucking kidding me!
+
+ It is *way* faster to draw points by creating and drawing a 1x1 CGImage
+ with repeated calls to CGContextDrawImage than it is to make a single
+ call to CGContextFillRects() with a list of 1x1 rectangles!
+
+ I still wouldn't call it *fast*, however...
+ */
+#define XDRAWPOINTS_IMAGES
+
+/* Update, 2012: Kurt Revis <krevis@snoize.com> points out that diddling
+ the bitmap data directly is faster. This only works on Pixmaps, though,
+ not Windows. (Fortunately, on iOS, the Window is really a Pixmap.)
+ */
+#define XDRAWPOINTS_CGDATA
+
+int
+XDrawPoints (Display *dpy, Drawable d, GC gc,
+ XPoint *points, int count, int mode)
+{
+ int i;
+ XRectangle wr = d->frame;
+
+# ifdef XDRAWPOINTS_CGDATA
+
+ if (bitmap_context_p (d))
+ {
+ CGContextRef cgc = d->cgc;
+ void *data = CGBitmapContextGetData (cgc);
+ size_t bpr = CGBitmapContextGetBytesPerRow (cgc);
+ size_t w = CGBitmapContextGetWidth (cgc);
+ size_t h = CGBitmapContextGetHeight (cgc);
+
+ Assert (data, "no bitmap data in Drawable");
+
+ unsigned long argb = gc->gcv.foreground;
+ jwxyz_validate_pixel (dpy, argb, gc->depth, gc->gcv.alpha_allowed_p);
+ if (gc->depth == 1)
+ argb = (gc->gcv.foreground ? WhitePixel(dpy,0) : BlackPixel(dpy,0));
+
+ CGFloat x0 = wr.x;
+ CGFloat y0 = wr.y; // Y axis is refreshingly not flipped.
+
+ // It's uglier, but faster, to hoist the conditional out of the loop.
+ if (mode == CoordModePrevious) {
+ CGFloat x = x0, y = y0;
+ for (i = 0; i < count; i++, points++) {
+ x += points->x;
+ y += points->y;
+
+ if (x >= 0 && x < w && y >= 0 && y < h) {
+ unsigned int *p = (unsigned int *)
+ ((char *) data + (size_t) y * bpr + (size_t) x * 4);
+ *p = (unsigned int) argb;
+ }
+ }
+ } else {
+ for (i = 0; i < count; i++, points++) {
+ CGFloat x = x0 + points->x;
+ CGFloat y = y0 + points->y;
+
+ if (x >= 0 && x < w && y >= 0 && y < h) {
+ unsigned int *p = (unsigned int *)
+ ((char *) data + (size_t) y * bpr + (size_t) x * 4);
+ *p = (unsigned int) argb;
+ }
+ }
+ }
+
+ } else /* d->type == WINDOW */
+
+# endif /* XDRAWPOINTS_CGDATA */
+ {
+ push_fg_gc (dpy, d, gc, YES);
+
+# ifdef XDRAWPOINTS_IMAGES
+
+ unsigned long argb = gc->gcv.foreground;
+ jwxyz_validate_pixel (dpy, argb, gc->depth, gc->gcv.alpha_allowed_p);
+ if (gc->depth == 1)
+ argb = (gc->gcv.foreground ? WhitePixel(dpy,0) : BlackPixel(dpy,0));
+
+ CGDataProviderRef prov = CGDataProviderCreateWithData (NULL, &argb, 4,
+ NULL);
+ CGImageRef cgi = CGImageCreate (1, 1,
+ 8, 32, 4,
+ dpy->colorspace,
+ /* Host-ordered, since we're using the
+ address of an int as the color data. */
+ dpy->screen->bitmap_info,
+ prov,
+ NULL, /* decode[] */
+ NO, /* interpolate */
+ kCGRenderingIntentDefault);
+ CGDataProviderRelease (prov);
+
+ CGContextRef cgc = d->cgc;
+ CGRect rect;
+ rect.size.width = rect.size.height = 1;
+ for (i = 0; i < count; i++) {
+ if (i > 0 && mode == CoordModePrevious) {
+ rect.origin.x += points->x;
+ rect.origin.x -= points->y;
+ } else {
+ rect.origin.x = wr.x + points->x;
+ rect.origin.y = wr.y + wr.height - points->y - 1;
+ }
+
+ //Assert(CGImageGetColorSpace (cgi) == dpy->colorspace,"bad colorspace");
+ CGContextDrawImage (cgc, rect, cgi);
+ points++;
+ }
+
+ CGImageRelease (cgi);
+
+# else /* ! XDRAWPOINTS_IMAGES */
+
+ CGRect *rects = (CGRect *) malloc (count * sizeof(CGRect));
+ CGRect *r = rects;
+
+ for (i = 0; i < count; i++) {
+ r->size.width = r->size.height = 1;
+ if (i > 0 && mode == CoordModePrevious) {
+ r->origin.x = r[-1].origin.x + points->x;
+ r->origin.y = r[-1].origin.x - points->y;
+ } else {
+ r->origin.x = wr.origin.x + points->x;
+ r->origin.y = wr.origin.y + wr.size.height - points->y;
+ }
+ points++;
+ r++;
+ }
+
+ CGContextFillRects (d->cgc, rects, count);
+ free (rects);
+
+# endif /* ! XDRAWPOINTS_IMAGES */
+
+ pop_gc (d, gc);
+ }
+
+ invalidate_drawable_cache (d);
+
+ return 0;
+}
+
+
+CGPoint
+map_point (Drawable d, int x, int y)
+{
+ const XRectangle *wr = &d->frame;
+ CGPoint p;
+ p.x = wr->x + x;
+ p.y = wr->y + wr->height - y;
+ return p;
+}
+
+
+static void
+adjust_point_for_line (GC gc, CGPoint *p)
+{
+ // Here's the authoritative discussion on how X draws lines:
+ // http://www.x.org/releases/current/doc/xproto/x11protocol.html#requests:CreateGC:line-width
+ if (gc->gcv.line_width <= 1) {
+ /* Thin lines are "drawn using an unspecified, device-dependent
+ algorithm", but seriously though, Bresenham's algorithm. Bresenham's
+ algorithm runs to and from pixel centers.
+
+ There's a few screenhacks (Maze, at the very least) that set line_width
+ to 1 when it probably should be set to 0, so it's line_width <= 1
+ instead of < 1.
+ */
+ p->x += 0.5;
+ p->y -= 0.5;
+ } else {
+ /* Thick lines OTOH run from the upper-left corners of pixels. This means
+ that a horizontal thick line of width 1 straddles two scan lines.
+ Aliasing requires one of these scan lines be chosen; the following
+ nudges the point so that the right choice is made. */
+ p->y -= 1e-3;
+ }
+}
+
+
+static CGPoint
+point_for_line (Drawable d, GC gc, int x, int y)
+{
+ CGPoint result = map_point (d, x, y);
+ adjust_point_for_line (gc, &result);
+ return result;
+}
+
+
+int
+XDrawLine (Display *dpy, Drawable d, GC gc, int x1, int y1, int x2, int y2)
+{
+ // when drawing a zero-length line, obey line-width and cap-style.
+ if (x1 == x2 && y1 == y2) {
+ int w = gc->gcv.line_width;
+ x1 -= w/2;
+ y1 -= w/2;
+ if (gc->gcv.line_width > 1 && gc->gcv.cap_style == CapRound)
+ return XFillArc (dpy, d, gc, x1, y1, w, w, 0, 360*64);
+ else {
+ if (!w)
+ w = 1; // Actually show zero-length lines.
+ return XFillRectangle (dpy, d, gc, x1, y1, w, w);
+ }
+ }
+
+ CGPoint p = point_for_line (d, gc, x1, y1);
+
+ push_fg_gc (dpy, d, gc, NO);
+
+ CGContextRef cgc = d->cgc;
+ set_line_mode (cgc, &gc->gcv);
+ CGContextBeginPath (cgc);
+ CGContextMoveToPoint (cgc, p.x, p.y);
+ p = point_for_line(d, gc, x2, y2);
+ CGContextAddLineToPoint (cgc, p.x, p.y);
+ CGContextStrokePath (cgc);
+ pop_gc (d, gc);
+ invalidate_drawable_cache (d);
+ return 0;
+}
+
+int
+XDrawLines (Display *dpy, Drawable d, GC gc, XPoint *points, int count,
+ int mode)
+{
+ int i;
+ CGPoint p;
+ push_fg_gc (dpy, d, gc, NO);
+
+ CGContextRef cgc = d->cgc;
+
+ set_line_mode (cgc, &gc->gcv);
+
+ // if the first and last points coincide, use closepath to get
+ // the proper line-joining.
+ BOOL closed_p = (points[0].x == points[count-1].x &&
+ points[0].y == points[count-1].y);
+ if (closed_p) count--;
+
+ p = point_for_line(d, gc, points->x, points->y);
+ points++;
+ CGContextBeginPath (cgc);
+ CGContextMoveToPoint (cgc, p.x, p.y);
+ for (i = 1; i < count; i++) {
+ if (mode == CoordModePrevious) {
+ p.x += points->x;
+ p.y -= points->y;
+ } else {
+ p = point_for_line(d, gc, points->x, points->y);
+ }
+ CGContextAddLineToPoint (cgc, p.x, p.y);
+ points++;
+ }
+ if (closed_p) CGContextClosePath (cgc);
+ CGContextStrokePath (cgc);
+ pop_gc (d, gc);
+ invalidate_drawable_cache (d);
+ return 0;
+}
+
+
+int
+XDrawSegments (Display *dpy, Drawable d, GC gc, XSegment *segments, int count)
+{
+ int i;
+
+ CGContextRef cgc = d->cgc;
+
+ push_fg_gc (dpy, d, gc, NO);
+ set_line_mode (cgc, &gc->gcv);
+ CGContextBeginPath (cgc);
+ for (i = 0; i < count; i++) {
+ CGPoint p = point_for_line (d, gc, segments->x1, segments->y1);
+ CGContextMoveToPoint (cgc, p.x, p.y);
+ p = point_for_line (d, gc, segments->x2, segments->y2);
+ CGContextAddLineToPoint (cgc, p.x, p.y);
+ segments++;
+ }
+ CGContextStrokePath (cgc);
+ pop_gc (d, gc);
+ invalidate_drawable_cache (d);
+ return 0;
+}
+
+
+int
+XClearWindow (Display *dpy, Window win)
+{
+ Assert (win && win->type == WINDOW, "not a window");
+ XRectangle wr = win->frame;
+ return XClearArea (dpy, win, 0, 0, wr.width, wr.height, 0);
+}
+
+unsigned long
+jwxyz_window_background (Display *dpy)
+{
+ return dpy->window_background;
+}
+
+int
+XSetWindowBackground (Display *dpy, Window w, unsigned long pixel)
+{
+ Assert (w && w->type == WINDOW, "not a window");
+ jwxyz_validate_pixel (dpy, pixel, 32, NO);
+ dpy->window_background = pixel;
+ return 0;
+}
+
+void
+jwxyz_fill_rects (Display *dpy, Drawable d, GC gc,
+ const XRectangle *rectangles, unsigned long nrectangles,
+ unsigned long pixel)
+{
+ Assert (!gc || gc->depth == jwxyz_drawable_depth (d), "depth mismatch");
+
+ CGContextRef cgc = d->cgc;
+
+ Bool fast_fill_p =
+ bitmap_context_p (d) &&
+ (!gc || (gc->gcv.function == GXcopy &&
+ !gc->gcv.alpha_allowed_p &&
+ !gc->gcv.clip_mask));
+
+ if (!fast_fill_p) {
+ if (gc)
+ push_color_gc (dpy, d, gc, pixel, gc->gcv.antialias_p, YES);
+ else
+ set_color (dpy, d->cgc, pixel, jwxyz_drawable_depth (d), NO, YES);
+ }
+
+ for (unsigned i = 0; i != nrectangles; ++i) {
+
+ int x = rectangles[i].x;
+ int y = rectangles[i].y;
+ unsigned long width = rectangles[i].width;
+ unsigned long height = rectangles[i].height;
+
+ if (fast_fill_p) {
+ long // negative_int > unsigned_int == 1
+ dw = CGBitmapContextGetWidth (cgc),
+ dh = CGBitmapContextGetHeight (cgc);
+
+ if (x >= dw || y >= dh)
+ continue;
+
+ if (x < 0) {
+ width += x;
+ x = 0;
+ }
+
+ if (y < 0) {
+ height += y;
+ y = 0;
+ }
+
+ if (width <= 0 || height <= 0)
+ continue;
+
+ unsigned long max_width = dw - x;
+ if (width > max_width)
+ width = max_width;
+ unsigned long max_height = dh - y;
+ if (height > max_height)
+ height = max_height;
+
+ if (jwxyz_drawable_depth (d) == 1)
+ pixel = pixel ? WhitePixel(dpy, 0) : BlackPixel(dpy, 0);
+
+ size_t dst_bytes_per_row = CGBitmapContextGetBytesPerRow (d->cgc);
+ void *dst = seek_xy (CGBitmapContextGetData (d->cgc),
+ dst_bytes_per_row, x, y);
+
+ Assert(sizeof(wchar_t) == 4, "somebody changed the ABI");
+ while (height) {
+ // Would be nice if Apple used SSE/NEON in wmemset. Maybe someday.
+ wmemset (dst, (wchar_t) pixel, width);
+ --height;
+ dst = (char *) dst + dst_bytes_per_row;
+ }
+
+ } else {
+ CGRect r;
+ r.origin = map_point (d, x, y);
+ r.origin.y -= height;
+ r.size.width = width;
+ r.size.height = height;
+ CGContextFillRect (cgc, r);
+ }
+ }
+
+ if (!fast_fill_p && gc)
+ pop_gc (d, gc);
+ invalidate_drawable_cache (d);
+}
+
+
+int
+XClearArea (Display *dpy, Window win, int x, int y, int w, int h, Bool exp)
+{
+ Assert (win && win->type == WINDOW, "not a window");
+ jwxyz_fill_rect (dpy, win, 0, x, y, w, h, dpy->window_background);
+ return 0;
+}
+
+
+int
+XFillPolygon (Display *dpy, Drawable d, GC gc,
+ XPoint *points, int npoints, int shape, int mode)
+{
+ XRectangle wr = d->frame;
+ int i;
+ push_fg_gc (dpy, d, gc, YES);
+ CGContextRef cgc = d->cgc;
+ CGContextBeginPath (cgc);
+ float x = 0, y = 0;
+ for (i = 0; i < npoints; i++) {
+ if (i > 0 && mode == CoordModePrevious) {
+ x += points[i].x;
+ y -= points[i].y;
+ } else {
+ x = wr.x + points[i].x;
+ y = wr.y + wr.height - points[i].y;
+ }
+
+ if (i == 0)
+ CGContextMoveToPoint (cgc, x, y);
+ else
+ CGContextAddLineToPoint (cgc, x, y);
+ }
+ CGContextClosePath (cgc);
+ if (gc->gcv.fill_rule == EvenOddRule)
+ CGContextEOFillPath (cgc);
+ else
+ CGContextFillPath (cgc);
+ pop_gc (d, gc);
+ invalidate_drawable_cache (d);
+ return 0;
+}
+
+#define radians(DEG) ((DEG) * M_PI / 180.0)
+#define degrees(RAD) ((RAD) * 180.0 / M_PI)
+
+int
+jwxyz_draw_arc (Display *dpy, Drawable d, GC gc, int x, int y,
+ unsigned int width, unsigned int height,
+ int angle1, int angle2, Bool fill_p)
+{
+ XRectangle wr = d->frame;
+ CGRect bound;
+ bound.origin.x = wr.x + x;
+ bound.origin.y = wr.y + wr.height - y - (int)height;
+ bound.size.width = width;
+ bound.size.height = height;
+
+ CGPoint ctr;
+ ctr.x = bound.origin.x + bound.size.width /2;
+ ctr.y = bound.origin.y + bound.size.height/2;
+
+ float r1 = radians (angle1/64.0);
+ float r2 = radians (angle2/64.0) + r1;
+ BOOL clockwise = angle2 < 0;
+ BOOL closed_p = (angle2 >= 360*64 || angle2 <= -360*64);
+
+ push_fg_gc (dpy, d, gc, fill_p);
+
+ CGContextRef cgc = d->cgc;
+ CGContextBeginPath (cgc);
+
+ CGContextSaveGState(cgc);
+ CGContextTranslateCTM (cgc, ctr.x, ctr.y);
+ CGContextScaleCTM (cgc, width/2.0, height/2.0);
+ if (fill_p)
+ CGContextMoveToPoint (cgc, 0, 0);
+
+ CGContextAddArc (cgc, 0.0, 0.0, 1, r1, r2, clockwise);
+ CGContextRestoreGState (cgc); // restore before stroke, for line width
+
+ if (closed_p)
+ CGContextClosePath (cgc); // for proper line joining
+
+ if (fill_p) {
+ CGContextFillPath (cgc);
+ } else {
+ set_line_mode (cgc, &gc->gcv);
+ CGContextStrokePath (cgc);
+ }
+
+ pop_gc (d, gc);
+ invalidate_drawable_cache (d);
+ return 0;
+}
+
+
+XGCValues *
+jwxyz_gc_gcv (GC gc)
+{
+ return &gc->gcv;
+}
+
+
+unsigned int
+jwxyz_gc_depth (GC gc)
+{
+ return gc->depth;
+}
+
+
+GC
+XCreateGC (Display *dpy, Drawable d, unsigned long mask, XGCValues *xgcv)
+{
+ struct jwxyz_GC *gc = (struct jwxyz_GC *) calloc (1, sizeof(*gc));
+ gc->depth = jwxyz_drawable_depth (d);
+
+ jwxyz_gcv_defaults (dpy, &gc->gcv, gc->depth);
+ XChangeGC (dpy, gc, mask, xgcv);
+ return gc;
+}
+
+
+int
+XFreeGC (Display *dpy, GC gc)
+{
+ if (gc->gcv.font)
+ XUnloadFont (dpy, gc->gcv.font);
+
+ Assert (!!gc->gcv.clip_mask == !!gc->clip_mask, "GC clip mask mixup");
+
+ if (gc->gcv.clip_mask) {
+ XFreePixmap (dpy, gc->gcv.clip_mask);
+ CGImageRelease (gc->clip_mask);
+ }
+ free (gc);
+ return 0;
+}
+
+
+static void
+flipbits (unsigned const char *in, unsigned char *out, int length)
+{
+ static const unsigned char table[256] = {
+ 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
+ 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
+ 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
+ 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
+ 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
+ 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
+ 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
+ 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
+ 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
+ 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
+ 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
+ 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
+ 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
+ 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
+ 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
+ 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
+ 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
+ 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
+ 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
+ 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
+ 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
+ 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
+ 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
+ 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
+ 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
+ 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
+ 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
+ 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
+ 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
+ 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
+ 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
+ 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
+ };
+ while (length-- > 0)
+ *out++ = table[*in++];
+}
+
+
+int
+XPutImage (Display *dpy, Drawable d, GC gc, XImage *ximage,
+ int src_x, int src_y, int dest_x, int dest_y,
+ unsigned int w, unsigned int h)
+{
+ XRectangle wr = d->frame;
+
+ Assert (gc, "no GC");
+ Assert ((w < 65535), "improbably large width");
+ Assert ((h < 65535), "improbably large height");
+ Assert ((src_x < 65535 && src_x > -65535), "improbably large src_x");
+ Assert ((src_y < 65535 && src_y > -65535), "improbably large src_y");
+ Assert ((dest_x < 65535 && dest_x > -65535), "improbably large dest_x");
+ Assert ((dest_y < 65535 && dest_y > -65535), "improbably large dest_y");
+
+ // Clip width and height to the bounds of the Drawable
+ //
+ if (dest_x + (int)w > wr.width) {
+ if (dest_x > wr.width)
+ return 0;
+ w = wr.width - dest_x;
+ }
+ if (dest_y + (int)h > wr.height) {
+ if (dest_y > wr.height)
+ return 0;
+ h = wr.height - dest_y;
+ }
+ if (w <= 0 || h <= 0)
+ return 0;
+
+ // Clip width and height to the bounds of the XImage
+ //
+ if (src_x + w > ximage->width) {
+ if (src_x > ximage->width)
+ return 0;
+ w = ximage->width - src_x;
+ }
+ if (src_y + h > ximage->height) {
+ if (src_y > ximage->height)
+ return 0;
+ h = ximage->height - src_y;
+ }
+ if (w <= 0 || h <= 0)
+ return 0;
+
+ CGContextRef cgc = d->cgc;
+
+ if (jwxyz_dumb_drawing_mode(dpy, d, gc, dest_x, dest_y, w, h))
+ return 0;
+
+ int bpl = ximage->bytes_per_line;
+ int bpp = ximage->bits_per_pixel;
+ int bsize = bpl * h;
+ char *data = ximage->data;
+
+ CGRect r;
+ r.origin.x = wr.x + dest_x;
+ r.origin.y = wr.y + wr.height - dest_y - (int)h;
+ r.size.width = w;
+ r.size.height = h;
+
+ if (bpp == 32) {
+
+ /* Take advantage of the fact that it's ok for (bpl != w * bpp)
+ to create a CGImage from a sub-rectagle of the XImage.
+ */
+ data += (src_y * bpl) + (src_x * 4);
+ CGDataProviderRef prov =
+ CGDataProviderCreateWithData (NULL, data, bsize, NULL);
+
+ CGImageRef cgi = CGImageCreate (w, h,
+ bpp/4, bpp, bpl,
+ dpy->colorspace,
+ dpy->screen->bitmap_info,
+ prov,
+ NULL, /* decode[] */
+ NO, /* interpolate */
+ kCGRenderingIntentDefault);
+ CGDataProviderRelease (prov);
+ //Assert (CGImageGetColorSpace (cgi) == dpy->colorspace, "bad colorspace");
+ CGContextDrawImage (cgc, r, cgi);
+ CGImageRelease (cgi);
+
+ } else { // (bpp == 1)
+
+ /* To draw a 1bpp image, we use it as a mask and fill two rectangles.
+
+ #### However, the bit order within a byte in a 1bpp XImage is
+ the wrong way around from what Quartz expects, so first we
+ have to copy the data to reverse it. Shit! Maybe it
+ would be worthwhile to go through the hacks and #ifdef
+ each one that diddles 1bpp XImage->data directly...
+ */
+ Assert ((src_x % 8) == 0,
+ "XPutImage with non-byte-aligned 1bpp X offset not implemented");
+
+ data += (src_y * bpl) + (src_x / 8); // move to x,y within the data
+ unsigned char *flipped = (unsigned char *) malloc (bsize);
+
+ flipbits ((unsigned char *) data, flipped, bsize);
+
+ CGDataProviderRef prov =
+ CGDataProviderCreateWithData (NULL, flipped, bsize, NULL);
+ CGImageRef mask = CGImageMaskCreate (w, h,
+ 1, bpp, bpl,
+ prov,
+ NULL, /* decode[] */
+ NO); /* interpolate */
+ push_fg_gc (dpy, d, gc, YES);
+
+ CGContextFillRect (cgc, r); // foreground color
+ CGContextClipToMask (cgc, r, mask);
+ set_color (dpy, cgc, gc->gcv.background, gc->depth, NO, YES);
+ CGContextFillRect (cgc, r); // background color
+ pop_gc (d, gc);
+
+ free (flipped);
+ CGDataProviderRelease (prov);
+ CGImageRelease (mask);
+ }
+
+ invalidate_drawable_cache (d);
+
+ return 0;
+}
+
+
+XImage *
+XGetImage (Display *dpy, Drawable d, int x, int y,
+ unsigned int width, unsigned int height,
+ unsigned long plane_mask, int format)
+{
+ const unsigned char *data = 0;
+ size_t depth, ibpp, ibpl;
+ convert_mode_t mode;
+
+ Assert ((width < 65535), "improbably large width");
+ Assert ((height < 65535), "improbably large height");
+ Assert ((x < 65535 && x > -65535), "improbably large x");
+ Assert ((y < 65535 && y > -65535), "improbably large y");
+
+ CGContextRef cgc = d->cgc;
+
+ {
+ depth = jwxyz_drawable_depth (d);
+ mode = convert_mode_to_rgba (dpy->screen->bitmap_info);
+ ibpp = CGBitmapContextGetBitsPerPixel (cgc);
+ ibpl = CGBitmapContextGetBytesPerRow (cgc);
+ data = CGBitmapContextGetData (cgc);
+ Assert (data, "CGBitmapContextGetData failed");
+ }
+
+ // data points at (x,y) with ibpl rowstride. ignore x,y from now on.
+ data += (y * ibpl) + (x * (ibpp/8));
+
+ format = (depth == 1 ? XYPixmap : ZPixmap);
+ XImage *image = XCreateImage (dpy, 0, (unsigned int) depth,
+ format, 0, 0, width, height, 0, 0);
+ image->data = (char *) malloc (height * image->bytes_per_line);
+
+ int obpl = image->bytes_per_line;
+
+ /* both PPC and Intel use word-ordered ARGB frame buffers, which
+ means that on Intel it is BGRA when viewed by bytes (And BGR
+ when using 24bpp packing).
+
+ BUT! Intel-64 stores alpha at the other end! 32bit=RGBA, 64bit=ARGB.
+ The NSAlphaFirstBitmapFormat bit in bitmapFormat seems to be the
+ indicator of this latest kink.
+ */
+ int xx, yy;
+ if (depth == 1) {
+ const unsigned char *iline = data;
+ for (yy = 0; yy < height; yy++) {
+
+ const unsigned char *iline2 = iline;
+ for (xx = 0; xx < width; xx++) {
+
+ iline2++; // ignore R or A or A or B
+ iline2++; // ignore G or B or R or G
+ unsigned char r = *iline2++; // use B or G or G or R
+ if (ibpp == 32) iline2++; // ignore A or R or B or A
+
+ XPutPixel (image, xx, yy, (r ? 1 : 0));
+ }
+ iline += ibpl;
+ }
+ } else {
+ const unsigned char *iline = data;
+ unsigned char *oline = (unsigned char *) image->data;
+
+ mode = convert_mode_merge (mode,
+ convert_mode_invert (
+ convert_mode_to_rgba (dpy->screen->bitmap_info)));
+
+ for (yy = 0; yy < height; yy++) {
+
+ convert_row ((uint32_t *)oline, iline, width, mode, ibpp);
+
+ oline += obpl;
+ iline += ibpl;
+ }
+ }
+
+ return image;
+}
+
+
+
+/* Returns a transformation matrix to do rotation as per the provided
+ EXIF "Orientation" value.
+ */
+static CGAffineTransform
+exif_rotate (int rot, CGSize rect)
+{
+ CGAffineTransform trans = CGAffineTransformIdentity;
+ switch (rot) {
+ case 2: // flip horizontal
+ trans = CGAffineTransformMakeTranslation (rect.width, 0);
+ trans = CGAffineTransformScale (trans, -1, 1);
+ break;
+
+ case 3: // rotate 180
+ trans = CGAffineTransformMakeTranslation (rect.width, rect.height);
+ trans = CGAffineTransformRotate (trans, M_PI);
+ break;
+
+ case 4: // flip vertical
+ trans = CGAffineTransformMakeTranslation (0, rect.height);
+ trans = CGAffineTransformScale (trans, 1, -1);
+ break;
+
+ case 5: // transpose (UL-to-LR axis)
+ trans = CGAffineTransformMakeTranslation (rect.height, rect.width);
+ trans = CGAffineTransformScale (trans, -1, 1);
+ trans = CGAffineTransformRotate (trans, 3 * M_PI / 2);
+ break;
+
+ case 6: // rotate 90
+ trans = CGAffineTransformMakeTranslation (0, rect.width);
+ trans = CGAffineTransformRotate (trans, 3 * M_PI / 2);
+ break;
+
+ case 7: // transverse (UR-to-LL axis)
+ trans = CGAffineTransformMakeScale (-1, 1);
+ trans = CGAffineTransformRotate (trans, M_PI / 2);
+ break;
+
+ case 8: // rotate 270
+ trans = CGAffineTransformMakeTranslation (rect.height, 0);
+ trans = CGAffineTransformRotate (trans, M_PI / 2);
+ break;
+
+ default:
+ break;
+ }
+
+ return trans;
+}
+
+
+void
+jwxyz_draw_NSImage_or_CGImage (Display *dpy, Drawable d,
+ Bool nsimg_p, void *img_arg,
+ XRectangle *geom_ret, int exif_rotation)
+{
+ CGImageRef cgi;
+# ifndef USE_IPHONE
+ CGImageSourceRef cgsrc;
+# endif // USE_IPHONE
+ NSSize imgr;
+
+ CGContextRef cgc = d->cgc;
+
+ if (nsimg_p) {
+
+ NSImage *nsimg = (NSImage *) img_arg;
+ imgr = [nsimg size];
+
+# ifndef USE_IPHONE
+ // convert the NSImage to a CGImage via the toll-free-bridging
+ // of NSData and CFData...
+ //
+ NSData *nsdata = [NSBitmapImageRep
+ TIFFRepresentationOfImageRepsInArray:
+ [nsimg representations]];
+ CFDataRef cfdata = (CFDataRef) nsdata;
+ cgsrc = CGImageSourceCreateWithData (cfdata, NULL);
+ cgi = CGImageSourceCreateImageAtIndex (cgsrc, 0, NULL);
+# else // USE_IPHONE
+ cgi = nsimg.CGImage;
+# endif // USE_IPHONE
+
+ } else {
+ cgi = (CGImageRef) img_arg;
+ imgr.width = CGImageGetWidth (cgi);
+ imgr.height = CGImageGetHeight (cgi);
+ }
+
+ Bool rot_p = (exif_rotation >= 5);
+
+ if (rot_p)
+ imgr = NSMakeSize (imgr.height, imgr.width);
+
+ XRectangle winr = d->frame;
+ float rw = winr.width / imgr.width;
+ float rh = winr.height / imgr.height;
+ float r = (rw < rh ? rw : rh);
+
+ CGRect dst, dst2;
+ dst.size.width = imgr.width * r;
+ dst.size.height = imgr.height * r;
+ dst.origin.x = (winr.width - dst.size.width) / 2;
+ dst.origin.y = (winr.height - dst.size.height) / 2;
+
+ dst2.origin.x = dst2.origin.y = 0;
+ if (rot_p) {
+ dst2.size.width = dst.size.height;
+ dst2.size.height = dst.size.width;
+ } else {
+ dst2.size = dst.size;
+ }
+
+ // Clear the part not covered by the image to background or black.
+ //
+ if (d->type == WINDOW)
+ XClearWindow (dpy, d);
+ else {
+ jwxyz_fill_rect (dpy, d, 0, 0, 0, winr.width, winr.height,
+ jwxyz_drawable_depth (d) == 1 ? 0 : BlackPixel(dpy,0));
+ }
+
+ CGAffineTransform trans =
+ exif_rotate (exif_rotation, rot_p ? dst2.size : dst.size);
+
+ CGContextSaveGState (cgc);
+ CGContextConcatCTM (cgc,
+ CGAffineTransformMakeTranslation (dst.origin.x,
+ dst.origin.y));
+ CGContextConcatCTM (cgc, trans);
+ //Assert (CGImageGetColorSpace (cgi) == dpy->colorspace, "bad colorspace");
+ CGContextDrawImage (cgc, dst2, cgi);
+ CGContextRestoreGState (cgc);
+
+# ifndef USE_IPHONE
+ if (nsimg_p) {
+ CFRelease (cgsrc);
+ CGImageRelease (cgi);
+ }
+# endif // USE_IPHONE
+
+ if (geom_ret) {
+ geom_ret->x = dst.origin.x;
+ geom_ret->y = dst.origin.y;
+ geom_ret->width = dst.size.width;
+ geom_ret->height = dst.size.height;
+ }
+
+ invalidate_drawable_cache (d);
+}
+
+
+
+Pixmap
+XCreatePixmap (Display *dpy, Drawable d,
+ unsigned int width, unsigned int height, unsigned int depth)
+{
+ if (!dpy) abort();
+ char *data = (char *) malloc (width * height * 4);
+ if (! data) return 0;
+
+ Pixmap p = (Pixmap) calloc (1, sizeof(*p));
+ p->type = PIXMAP;
+ p->frame.width = width;
+ p->frame.height = height;
+ p->pixmap.depth = depth;
+ p->pixmap.cgc_buffer = data;
+
+ /* Quartz doesn't have a 1bpp image type.
+ Used to use 8bpp gray images instead of 1bpp, but some Mac video cards
+ don't support that! So we always use 32bpp, regardless of depth. */
+
+ p->cgc = CGBitmapContextCreate (data, width, height,
+ 8, /* bits per component */
+ width * 4, /* bpl */
+ dpy->colorspace,
+ dpy->screen->bitmap_info);
+ Assert (p->cgc, "could not create CGBitmapContext");
+ return p;
+}
+
+
+int
+XFreePixmap (Display *d, Pixmap p)
+{
+ Assert (p && p->type == PIXMAP, "not a pixmap");
+ invalidate_drawable_cache (p);
+ CGContextRelease (p->cgc);
+ if (p->pixmap.cgc_buffer)
+ free (p->pixmap.cgc_buffer);
+ free (p);
+ return 0;
+}
+
+
+static Pixmap
+copy_pixmap (Display *dpy, Pixmap p)
+{
+ if (!p) return 0;
+ Assert (p->type == PIXMAP, "not a pixmap");
+
+ Pixmap p2 = 0;
+
+ Window root;
+ int x, y;
+ unsigned int width, height, border_width, depth;
+ if (XGetGeometry (dpy, p, &root,
+ &x, &y, &width, &height, &border_width, &depth)) {
+ XGCValues gcv;
+ gcv.function = GXcopy;
+ GC gc = XCreateGC (dpy, p, GCFunction, &gcv);
+ if (gc) {
+ p2 = XCreatePixmap (dpy, p, width, height, depth);
+ if (p2)
+ XCopyArea (dpy, p, p2, gc, 0, 0, width, height, 0, 0);
+ XFreeGC (dpy, gc);
+ }
+ }
+
+ Assert (p2, "could not copy pixmap");
+
+ return p2;
+}
+
+
+/* Font metric terminology, as used by X11:
+
+ "lbearing" is the distance from the logical origin to the leftmost pixel.
+ If a character's ink extends to the left of the origin, it is negative.
+
+ "rbearing" is the distance from the logical origin to the rightmost pixel.
+
+ "descent" is the distance from the logical origin to the bottommost pixel.
+ For characters with descenders, it is positive. For superscripts, it
+ is negative.
+
+ "ascent" is the distance from the logical origin to the topmost pixel.
+ It is the number of pixels above the baseline.
+
+ "width" is the distance from the logical origin to the position where
+ the logical origin of the next character should be placed.
+
+ If "rbearing" is greater than "width", then this character overlaps the
+ following character. If smaller, then there is trailing blank space.
+ */
+static void
+utf8_metrics (Font fid, NSString *nsstr, XCharStruct *cs)
+{
+ // Returns the metrics of the multi-character, single-line UTF8 string.
+
+ NSFont *nsfont = fid->nsfont;
+ Drawable d = XRootWindow (fid->dpy, 0);
+
+ CGContextRef cgc = d->cgc;
+ NSDictionary *attr =
+ [NSDictionary dictionaryWithObjectsAndKeys:
+ nsfont, NSFontAttributeName,
+ nil];
+ NSAttributedString *astr = [[NSAttributedString alloc]
+ initWithString:nsstr
+ attributes:attr];
+ CTLineRef ctline = CTLineCreateWithAttributedString (
+ (__bridge CFAttributedStringRef) astr);
+ CGContextSetTextPosition (cgc, 0, 0);
+ CGContextSetShouldAntialias (cgc, True); // #### Guess?
+
+ memset (cs, 0, sizeof(*cs));
+
+ // "CTRun represents set of consecutive glyphs sharing the same
+ // attributes and direction".
+ //
+ // We also get multiple runs any time font subsitution happens:
+ // E.g., if the current font is Verdana-Bold, a ← character
+ // in the NSString will actually be rendered in LucidaGrande-Bold.
+ //
+ int count = 0;
+ for (id runid in (NSArray *)CTLineGetGlyphRuns(ctline)) {
+ CTRunRef run = (CTRunRef) runid;
+ CFRange r = { 0, };
+ CGRect bbox = CTRunGetImageBounds (run, cgc, r);
+ CGFloat ascent, descent, leading;
+ CGFloat advancement =
+ CTRunGetTypographicBounds (run, r, &ascent, &descent, &leading);
+
+# ifndef USE_IPHONE
+ // Only necessary for when LCD smoothing is enabled, which iOS doesn't do.
+ bbox.origin.x -= 2.0/3.0;
+ bbox.size.width += 4.0/3.0;
+ bbox.size.height += 1.0/2.0;
+# endif
+
+ // Create the metrics for this run:
+ XCharStruct cc;
+ cc.ascent = ceil (bbox.origin.y + bbox.size.height);
+ cc.descent = ceil (-bbox.origin.y);
+ cc.lbearing = floor (bbox.origin.x);
+ cc.rbearing = ceil (bbox.origin.x + bbox.size.width);
+ cc.width = floor (advancement + 0.5);
+
+ // Add those metrics into the cumulative metrics:
+ if (count == 0)
+ *cs = cc;
+ else
+ {
+ cs->ascent = MAX (cs->ascent, cc.ascent);
+ cs->descent = MAX (cs->descent, cc.descent);
+ cs->lbearing = MIN (cs->lbearing, cs->width + cc.lbearing);
+ cs->rbearing = MAX (cs->rbearing, cs->width + cc.rbearing);
+ cs->width = MAX (cs->width, cs->width + cc.width);
+ }
+
+ // Why no y? What about vertical text?
+ // XCharStruct doesn't encapsulate that but XGlyphInfo does.
+
+ count++;
+ }
+
+ [astr release];
+ CFRelease (ctline);
+}
+
+
+
+// This is XQueryFont, but for the XFontStruct embedded in 'Font'
+//
+static void
+query_font (Font fid)
+{
+ if (!fid || !fid->nsfont) {
+ Assert (0, "no NSFont in fid");
+ return;
+ }
+ if (![fid->nsfont fontName]) {
+ Assert(0, "broken NSFont in fid");
+ return;
+ }
+
+ int first = 32;
+ int last = 255;
+
+ XFontStruct *f = &fid->metrics;
+ XCharStruct *min = &f->min_bounds;
+ XCharStruct *max = &f->max_bounds;
+
+ f->fid = fid;
+ f->min_char_or_byte2 = first;
+ f->max_char_or_byte2 = last;
+ f->default_char = 'M';
+ f->ascent = ceil ([fid->nsfont ascender]);
+ f->descent = -floor ([fid->nsfont descender]);
+
+ min->width = 32767; // set to smaller values in the loop
+ min->ascent = 32767;
+ min->descent = 32767;
+ min->lbearing = 32767;
+ min->rbearing = 32767;
+
+ f->per_char = (XCharStruct *) calloc (last-first+2, sizeof (XCharStruct));
+
+ for (int i = first; i <= last; i++) {
+ XCharStruct *cs = &f->per_char[i-first];
+
+ char s2[2];
+ s2[0] = i;
+ s2[1] = 0;
+ NSString *nsstr = [NSString stringWithCString:s2
+ encoding:NSISOLatin1StringEncoding];
+ utf8_metrics (fid, nsstr, cs);
+
+ max->width = MAX (max->width, cs->width);
+ max->ascent = MAX (max->ascent, cs->ascent);
+ max->descent = MAX (max->descent, cs->descent);
+ max->lbearing = MAX (max->lbearing, cs->lbearing);
+ max->rbearing = MAX (max->rbearing, cs->rbearing);
+
+ min->width = MIN (min->width, cs->width);
+ min->ascent = MIN (min->ascent, cs->ascent);
+ min->descent = MIN (min->descent, cs->descent);
+ min->lbearing = MIN (min->lbearing, cs->lbearing);
+ min->rbearing = MIN (min->rbearing, cs->rbearing);
+
+# if 0
+ fprintf(stderr, " %3d %c: w=%3d lb=%3d rb=%3d as=%3d ds=%3d "
+ " bb=%5.1f x %5.1f @ %5.1f %5.1f adv=%5.1f %5.1f\n",
+ i, i, cs->width, cs->lbearing, cs->rbearing,
+ cs->ascent, cs->descent,
+ bbox.size.width, bbox.size.height,
+ bbox.origin.x, bbox.origin.y,
+ advancement.width, advancement.height);
+# endif // 0
+ }
+}
+
+
+// Since 'Font' includes the metrics, this just makes a copy of that.
+//
+XFontStruct *
+XQueryFont (Display *dpy, Font fid)
+{
+ // copy XFontStruct
+ XFontStruct *f = (XFontStruct *) calloc (1, sizeof(*f));
+ *f = fid->metrics;
+
+ // build XFontProps
+ f->n_properties = 1;
+ f->properties = malloc (sizeof(*f->properties) * f->n_properties);
+ f->properties[0].name = XA_FONT;
+ Assert (sizeof (f->properties[0].card32) >= sizeof (char *),
+ "atoms probably needs a real implementation");
+ // If XInternAtom is ever implemented, use it here.
+ f->properties[0].card32 = (char *)fid->xa_font;
+
+ // copy XCharStruct array
+ int size = (f->max_char_or_byte2 - f->min_char_or_byte2) + 1;
+ f->per_char = (XCharStruct *) calloc (size + 2, sizeof (XCharStruct));
+ memcpy (f->per_char, fid->metrics.per_char,
+ size * sizeof (XCharStruct));
+
+ return f;
+}
+
+
+static Font
+copy_font (Font fid)
+{
+ // copy 'Font' struct
+ Font fid2 = (Font) malloc (sizeof(*fid2));
+ *fid2 = *fid;
+
+ // copy XCharStruct array
+ int size = fid->metrics.max_char_or_byte2 - fid->metrics.min_char_or_byte2;
+ fid2->metrics.per_char = (XCharStruct *)
+ malloc ((size + 2) * sizeof (XCharStruct));
+ memcpy (fid2->metrics.per_char, fid->metrics.per_char,
+ size * sizeof (XCharStruct));
+
+ // copy the other pointers
+ fid2->ps_name = strdup (fid->ps_name);
+ fid2->xa_font = strdup (fid->xa_font);
+// [fid2->nsfont retain];
+ fid2->metrics.fid = fid2;
+
+ return fid2;
+}
+
+
+static NSArray *
+font_family_members (NSString *family_name)
+{
+# ifndef USE_IPHONE
+ return [[NSFontManager sharedFontManager]
+ availableMembersOfFontFamily:family_name];
+# else
+ return [UIFont fontNamesForFamilyName:family_name];
+# endif
+}
+
+
+static NSString *
+default_font_family (NSFontTraitMask require)
+{
+ return require & NSFixedPitchFontMask ? @"Courier" : @"Verdana";
+}
+
+
+static NSFont *
+try_font (NSFontTraitMask traits, NSFontTraitMask mask,
+ NSString *family_name, float size,
+ char **name_ret)
+{
+ Assert (size > 0, "zero font size");
+
+ NSArray *family_members = font_family_members (family_name);
+ if (!family_members.count)
+ family_members = font_family_members (default_font_family (traits));
+
+# ifndef USE_IPHONE
+ for (unsigned k = 0; k != family_members.count; ++k) {
+
+ NSArray *member = [family_members objectAtIndex:k];
+ NSFontTraitMask font_mask =
+ [(NSNumber *)[member objectAtIndex:3] unsignedIntValue];
+
+ if ((font_mask & mask) == traits) {
+
+ NSString *name = [member objectAtIndex:0];
+ NSFont *f = [NSFont fontWithName:name size:size];
+ if (!f)
+ break;
+
+ /* Don't use this font if it (probably) doesn't include ASCII characters.
+ */
+ NSStringEncoding enc = [f mostCompatibleStringEncoding];
+ if (! (enc == NSUTF8StringEncoding ||
+ enc == NSISOLatin1StringEncoding ||
+ enc == NSNonLossyASCIIStringEncoding ||
+ enc == NSISOLatin2StringEncoding ||
+ enc == NSUnicodeStringEncoding ||
+ enc == NSWindowsCP1250StringEncoding ||
+ enc == NSWindowsCP1252StringEncoding ||
+ enc == NSMacOSRomanStringEncoding)) {
+ // NSLog(@"skipping \"%@\": encoding = %d", name, enc);
+ break;
+ }
+ // NSLog(@"using \"%@\": %d", name, enc);
+
+ // *name_ret = strdup ([name cStringUsingEncoding:NSUTF8StringEncoding]);
+ *name_ret = strdup (name.UTF8String);
+ return f;
+ }
+ }
+# else // USE_IPHONE
+
+ // This trick needs iOS 3.1, see "Using SDK-Based Development".
+ Class has_font_descriptor = [UIFontDescriptor class];
+
+ for (NSString *fn in family_members) {
+# define MATCH(X) \
+ ([fn rangeOfString:X options:NSCaseInsensitiveSearch].location \
+ != NSNotFound)
+
+ NSFontTraitMask font_mask;
+ if (has_font_descriptor) {
+ // This only works on iOS 7 and later.
+ font_mask = [[UIFontDescriptor
+ fontDescriptorWithFontAttributes:
+ @{UIFontDescriptorNameAttribute:fn}]
+ symbolicTraits];
+ } else {
+ font_mask = 0;
+ if (MATCH(@"Bold"))
+ font_mask |= NSBoldFontMask;
+ if (MATCH(@"Italic") || MATCH(@"Oblique"))
+ font_mask |= NSItalicFontMask;
+ if (MATCH(@"Courier"))
+ font_mask |= NSFixedPitchFontMask;
+ }
+
+ if ((font_mask & mask) == traits) {
+
+ /* Check if it can do ASCII. No good way to accomplish this!
+ These are fonts present in iPhone Simulator as of June 2012
+ that don't include ASCII.
+ */
+ if (MATCH(@"AppleGothic") || // Korean
+ MATCH(@"Dingbats") || // Dingbats
+ MATCH(@"Emoji") || // Emoticons
+ MATCH(@"Geeza") || // Arabic
+ MATCH(@"Hebrew") || // Hebrew
+ MATCH(@"HiraKaku") || // Japanese
+ MATCH(@"HiraMin") || // Japanese
+ MATCH(@"Kailasa") || // Tibetan
+ MATCH(@"Ornaments") || // Dingbats
+ MATCH(@"STHeiti") // Chinese
+ )
+ break;
+
+ *name_ret = strdup (fn.UTF8String);
+ return [UIFont fontWithName:fn size:size];
+ }
+# undef MATCH
+ }
+
+# endif
+
+ return NULL;
+}
+
+
+/* On Cocoa and iOS, fonts may be specified as "Georgia Bold 24" instead
+ of XLFD strings; also they can be comma-separated strings with multiple
+ font names. First one that exists wins.
+ */
+static NSFont *
+try_native_font (const char *name, float scale,
+ char **name_ret, float *size_ret, char **xa_font)
+{
+ if (!name) return 0;
+ const char *spc = strrchr (name, ' ');
+ if (!spc) return 0;
+
+ NSFont *f = 0;
+ char *token = strdup (name);
+ char *otoken = token;
+ char *name2;
+ char *lasts;
+
+ while ((name2 = strtok_r (token, ",", &lasts))) {
+ token = 0;
+
+ while (*name2 == ' ' || *name2 == '\t' || *name2 == '\n')
+ name2++;
+
+ spc = strrchr (name2, ' ');
+ if (!spc) continue;
+
+ int dsize = 0;
+ if (1 != sscanf (spc, " %d ", &dsize))
+ continue;
+ float size = dsize;
+
+ if (size < 4) continue;
+
+ size *= scale;
+
+ name2[strlen(name2) - strlen(spc)] = 0;
+
+ NSString *nsname = [NSString stringWithCString:name2
+ encoding:NSUTF8StringEncoding];
+ f = [NSFont fontWithName:nsname size:size];
+ if (f) {
+ *name_ret = strdup (name2);
+ *size_ret = size;
+ *xa_font = strdup (name); // Maybe this should be an XLFD?
+ break;
+ } else {
+ NSLog(@"No native font: \"%@\" %.0f", nsname, size);
+# if 0
+ for (NSString *fam in [UIFont familyNames]) {
+ NSLog(@"Family: %@", fam);
+ for (NSString *f in [UIFont fontNamesForFamilyName:fam]) {
+ NSLog(@" Font: %@", f);
+ }
+ }
+# endif
+ }
+ }
+
+ free (otoken);
+ return f;
+}
+
+
+/* Returns a random font in the given size and face.
+ */
+static NSFont *
+random_font (NSFontTraitMask traits, NSFontTraitMask mask,
+ float size, NSString **family_ret, char **name_ret)
+{
+
+# ifndef USE_IPHONE
+ // Providing Unbold or Unitalic in the mask for availableFontNamesWithTraits
+ // returns an empty list, at least on a system with default fonts only.
+ NSArray *families = [[NSFontManager sharedFontManager]
+ availableFontFamilies];
+ if (!families) return 0;
+# else
+ NSArray *families = [UIFont familyNames];
+
+ // There are many dups in the families array -- uniquify it.
+ {
+ NSArray *sorted_families =
+ [families sortedArrayUsingSelector:@selector(compare:)];
+ NSMutableArray *new_families =
+ [NSMutableArray arrayWithCapacity:sorted_families.count];
+
+ NSString *prev_family = @"";
+ for (NSString *family in sorted_families) {
+ if ([family compare:prev_family])
+ [new_families addObject:family];
+ prev_family = family;
+ }
+
+ families = new_families;
+ }
+# endif // USE_IPHONE
+
+ long n = [families count];
+ if (n <= 0) return 0;
+
+ int j;
+ for (j = 0; j < n; j++) {
+ int i = random() % n;
+ NSString *family_name = [families objectAtIndex:i];
+
+ NSFont *result = try_font (traits, mask, family_name, size, name_ret);
+ if (result) {
+ [*family_ret release];
+ *family_ret = family_name;
+ [*family_ret retain];
+ return result;
+ }
+ }
+
+ // None of the fonts support ASCII?
+ return 0;
+}
+
+
+static const char *
+xlfd_field_end (const char *s)
+{
+ const char *s2 = strchr(s, '-');
+ if (!s2)
+ s2 = s + strlen(s);
+ return s2;
+}
+
+
+static size_t
+xlfd_next (const char **s, const char **s2)
+{
+ if (!**s2) {
+ *s = *s2;
+ } else {
+ Assert (**s2 == '-', "xlfd parse error");
+ *s = *s2 + 1;
+ *s2 = xlfd_field_end (*s);
+ }
+
+ return *s2 - *s;
+}
+
+
+static NSFont *
+try_xlfd_font (Display *dpy, const char *name, float scale,
+ char **name_ret, float *size_ret, char **xa_font)
+{
+ NSFont *nsfont = 0;
+ NSString *family_name = nil;
+ NSFontTraitMask require = 0,
+ // Default mask is for the built-in X11 font aliases.
+ mask = NSFixedPitchFontMask | NSBoldFontMask | NSItalicFontMask;
+ BOOL rand = NO;
+ float size = 0;
+ char *ps_name = 0;
+
+ const char *s = (name ? name : "");
+
+ size_t L = strlen (s);
+# define CMP(STR) (L == strlen(STR) && !strncasecmp (s, (STR), L))
+# define UNSPEC (L == 0 || L == 1 && *s == '*')
+ if (CMP ("6x10")) size = 8, require |= NSFixedPitchFontMask;
+ else if (CMP ("6x10bold")) size = 8, require |= NSFixedPitchFontMask | NSBoldFontMask;
+ else if (CMP ("fixed")) size = 12, require |= NSFixedPitchFontMask;
+ else if (CMP ("9x15")) size = 12, require |= NSFixedPitchFontMask;
+ else if (CMP ("9x15bold")) size = 12, require |= NSFixedPitchFontMask | NSBoldFontMask;
+ else if (CMP ("vga")) size = 12, require |= NSFixedPitchFontMask;
+ else if (CMP ("console")) size = 12, require |= NSFixedPitchFontMask;
+ else if (CMP ("gallant")) size = 12, require |= NSFixedPitchFontMask;
+ else {
+
+ NSFontTraitMask forbid = 0;
+
+ // Incorrect fields are ignored.
+
+ if (*s == '-')
+ ++s;
+ const char *s2 = xlfd_field_end(s);
+
+ // Foundry (ignore)
+
+ L = xlfd_next (&s, &s2); // Family name
+ // This used to substitute Georgia for Times. Now it doesn't.
+ if (CMP ("random")) {
+ rand = YES;
+ } else if (CMP ("fixed")) {
+ require |= NSFixedPitchFontMask;
+ family_name = @"Courier";
+ } else if (!UNSPEC) {
+ family_name = [[[NSString alloc] initWithBytes:s
+ length:L
+ encoding:NSUTF8StringEncoding]
+ autorelease];
+ }
+
+ L = xlfd_next (&s, &s2); // Weight name
+ if (CMP ("bold") || CMP ("demibold"))
+ require |= NSBoldFontMask;
+ else if (CMP ("medium") || CMP ("regular"))
+ forbid |= NSBoldFontMask;
+
+ L = xlfd_next (&s, &s2); // Slant
+ if (CMP ("i") || CMP ("o"))
+ require |= NSItalicFontMask;
+ else if (CMP ("r"))
+ forbid |= NSItalicFontMask;
+
+ xlfd_next (&s, &s2); // Set width name (ignore)
+ xlfd_next (&s, &s2); // Add style name (ignore)
+
+ xlfd_next (&s, &s2); // Pixel size (ignore)
+
+ xlfd_next (&s, &s2); // Point size
+ char *s3;
+ uintmax_t n = strtoumax(s, &s3, 10);
+ if (s2 == s3)
+ size = n / 10.0;
+
+ xlfd_next (&s, &s2); // Resolution X (ignore)
+ xlfd_next (&s, &s2); // Resolution Y (ignore)
+
+ xlfd_next (&s, &s2); // Spacing
+ if (CMP ("p"))
+ forbid |= NSFixedPitchFontMask;
+ else if (CMP ("m") || CMP ("c"))
+ require |= NSFixedPitchFontMask;
+
+ // Don't care about average_width or charset registry.
+
+ mask = require | forbid;
+ }
+# undef CMP
+# undef UNSPEC
+
+ if (!family_name && !rand)
+ family_name = default_font_family (require);
+
+ if (size < 6 || size > 1000)
+ size = 12;
+
+ size *= scale;
+
+ if (rand) {
+ nsfont = random_font (require, mask, size, &family_name, &ps_name);
+ [family_name autorelease];
+ }
+
+ if (!nsfont)
+ nsfont = try_font (require, mask, family_name, size, &ps_name);
+
+ // if that didn't work, turn off attibutes until it does
+ // (e.g., there is no "Monaco-Bold".)
+ //
+ if (!nsfont && (mask & NSItalicFontMask)) {
+ require &= ~NSItalicFontMask;
+ mask &= ~NSItalicFontMask;
+ nsfont = try_font (require, mask, family_name, size, &ps_name);
+ }
+ if (!nsfont && (mask & NSBoldFontMask)) {
+ require &= ~NSBoldFontMask;
+ mask &= ~NSBoldFontMask;
+ nsfont = try_font (require, mask, family_name, size, &ps_name);
+ }
+ if (!nsfont && (mask & NSFixedPitchFontMask)) {
+ require &= ~NSFixedPitchFontMask;
+ mask &= ~NSFixedPitchFontMask;
+ nsfont = try_font (require, mask, family_name, size, &ps_name);
+ }
+
+ if (nsfont) {
+ unsigned dpi_d = XDisplayHeightMM (dpy,0) * 10 / 2;
+ unsigned dpi = (254 * XDisplayHeight (dpy,0) + dpi_d) / (2 * dpi_d);
+ *name_ret = ps_name;
+ *size_ret = size;
+ float actual_size = size / scale;
+ asprintf(xa_font, "-*-%s-%s-%c-*-*-%u-%u-%u-%u-%c-0-iso10646-1",
+ family_name.UTF8String,
+ (require & NSBoldFontMask) ? "bold" : "medium",
+ (require & NSItalicFontMask) ? 'o' : 'r',
+ (unsigned)(dpi * actual_size / 72.27 + 0.5),
+ (unsigned)(actual_size * 10 + 0.5), dpi, dpi,
+ (require & NSFixedPitchFontMask) ? 'm' : 'p');
+ return nsfont;
+ } else {
+ if (ps_name) free (ps_name);
+ return 0;
+ }
+}
+
+
+Font
+XLoadFont (Display *dpy, const char *name)
+{
+ Font fid = (Font) calloc (1, sizeof(*fid));
+
+ float scale = 1;
+
+# ifdef USE_IPHONE
+ /* Since iOS screens are physically smaller than desktop screens, scale up
+ the fonts to make them more readable.
+
+ Note that X11 apps on iOS also have the backbuffer sized in points
+ instead of pixels, resulting in an effective X11 screen size of 768x1024
+ or so, even if the display has significantly higher resolution. That is
+ unrelated to this hack, which is really about DPI.
+ */
+ scale = dpy->main_window->window.view.hackedContentScaleFactor;
+ if (scale < 1) // iPad Pro magnifies the backbuffer by 3x, which makes text
+ scale = 1; // excessively blurry in BSOD.
+# endif
+
+ fid->dpy = dpy;
+ fid->nsfont = try_native_font (name, scale, &fid->ps_name, &fid->size,
+ &fid->xa_font);
+
+ if (!fid->nsfont && name &&
+ strchr (name, ' ') &&
+ !strchr (name, '*')) {
+ // If name contains a space but no stars, it is a native font spec --
+ // return NULL so that we know it really didn't exist. Else, it is an
+ // XLFD font, so keep trying.
+ XUnloadFont (dpy, fid);
+ return 0;
+ }
+
+ if (! fid->nsfont)
+ fid->nsfont = try_xlfd_font (dpy, name, scale, &fid->ps_name, &fid->size,
+ &fid->xa_font);
+
+ // We should never return NULL for XLFD fonts.
+ if (!fid->nsfont) {
+ Assert (0, "no font");
+ return 0;
+ }
+ CFRetain (fid->nsfont); // needed for garbage collection?
+
+ //NSLog(@"parsed \"%s\" to %s %.1f", name, fid->ps_name, fid->size);
+
+ query_font (fid);
+
+ return fid;
+}
+
+
+XFontStruct *
+XLoadQueryFont (Display *dpy, const char *name)
+{
+ Font fid = XLoadFont (dpy, name);
+ if (!fid) return 0;
+ return XQueryFont (dpy, fid);
+}
+
+int
+XUnloadFont (Display *dpy, Font fid)
+{
+ if (fid->ps_name)
+ free (fid->ps_name);
+ if (fid->metrics.per_char)
+ free (fid->metrics.per_char);
+
+ // #### DAMMIT! I can't tell what's going wrong here, but I keep getting
+ // crashes in [NSFont ascender] <- query_font, and it seems to go away
+ // if I never release the nsfont. So, fuck it, we'll just leak fonts.
+ // They're probably not very big...
+ //
+ // [fid->nsfont release];
+ // CFRelease (fid->nsfont);
+
+ free (fid);
+ return 0;
+}
+
+int
+XFreeFontInfo (char **names, XFontStruct *info, int n)
+{
+ int i;
+ if (names) {
+ for (i = 0; i < n; i++)
+ if (names[i]) free (names[i]);
+ free (names);
+ }
+ if (info) {
+ for (i = 0; i < n; i++)
+ if (info[i].per_char) {
+ free (info[i].per_char);
+ free (info[i].properties);
+ }
+ free (info);
+ }
+ return 0;
+}
+
+int
+XFreeFont (Display *dpy, XFontStruct *f)
+{
+ Font fid = f->fid;
+ XFreeFontInfo (0, f, 1);
+ XUnloadFont (dpy, fid);
+ return 0;
+}
+
+
+int
+XSetFont (Display *dpy, GC gc, Font fid)
+{
+ if (gc->gcv.font)
+ XUnloadFont (dpy, gc->gcv.font);
+ gc->gcv.font = copy_font (fid);
+ [gc->gcv.font->nsfont retain];
+ CFRetain (gc->gcv.font->nsfont); // needed for garbage collection?
+ return 0;
+}
+
+
+XFontSet
+XCreateFontSet (Display *dpy, char *name,
+ char ***missing_charset_list_return,
+ int *missing_charset_count_return,
+ char **def_string_return)
+{
+ char *name2 = strdup (name);
+ char *s = strchr (name, ",");
+ if (s) *s = 0;
+ XFontSet set = 0;
+ XFontStruct *f = XLoadQueryFont (dpy, name2);
+ if (f)
+ {
+ set = (XFontSet) calloc (1, sizeof(*set));
+ set->font = f;
+ }
+ free (name2);
+ if (missing_charset_list_return) *missing_charset_list_return = 0;
+ if (missing_charset_count_return) *missing_charset_count_return = 0;
+ if (def_string_return) *def_string_return = 0;
+ return set;
+}
+
+
+void
+XFreeFontSet (Display *dpy, XFontSet set)
+{
+ XFreeFont (dpy, set->font);
+ free (set);
+}
+
+
+const char *
+jwxyz_nativeFontName (Font f, float *size)
+{
+ if (size) *size = f->size;
+ return f->ps_name;
+}
+
+
+void
+XFreeStringList (char **list)
+{
+ int i;
+ if (!list) return;
+ for (i = 0; list[i]; i++)
+ XFree (list[i]);
+ XFree (list);
+}
+
+
+// Returns the verbose Unicode name of this character, like "agrave" or
+// "daggerdouble". Used by fontglide debugMetrics.
+//
+char *
+jwxyz_unicode_character_name (Font fid, unsigned long uc)
+{
+ char *ret = 0;
+ CTFontRef ctfont =
+ CTFontCreateWithName ((CFStringRef) [fid->nsfont fontName],
+ [fid->nsfont pointSize],
+ NULL);
+ Assert (ctfont, "no CTFontRef for UIFont");
+
+ CGGlyph cgglyph;
+ if (CTFontGetGlyphsForCharacters (ctfont, (UniChar *) &uc, &cgglyph, 1)) {
+ CGFontRef cgfont = CTFontCopyGraphicsFont (ctfont, 0);
+ NSString *name = (NSString *) CGFontCopyGlyphNameForGlyph(cgfont, cgglyph);
+ ret = (name ? strdup ([name UTF8String]) : 0);
+ CGFontRelease (cgfont);
+ [name release];
+ }
+
+ CFRelease (ctfont);
+ return ret;
+}
+
+
+// Given a UTF8 string, return an NSString. Bogus UTF8 characters are ignored.
+// We have to do this because stringWithCString returns NULL if there are
+// any invalid characters at all.
+//
+static NSString *
+sanitize_utf8 (const char *in, int in_len, Bool *latin1_pP)
+{
+ int out_len = in_len * 4; // length of string might increase
+ char *s2 = (char *) malloc (out_len);
+ char *out = s2;
+ const char *in_end = in + in_len;
+ const char *out_end = out + out_len;
+ Bool latin1_p = True;
+
+ while (in < in_end)
+ {
+ unsigned long uc;
+ long L1 = utf8_decode ((const unsigned char *) in, in_end - in, &uc);
+ long L2 = utf8_encode (uc, out, out_end - out);
+ in += L1;
+ out += L2;
+ if (uc > 255) latin1_p = False;
+ }
+ *out = 0;
+ NSString *nsstr =
+ [NSString stringWithCString:s2 encoding:NSUTF8StringEncoding];
+ free (s2);
+ if (latin1_pP) *latin1_pP = latin1_p;
+ return (nsstr ? nsstr : @"");
+}
+
+
+int
+XTextExtents (XFontStruct *f, const char *s, int length,
+ int *dir_ret, int *ascent_ret, int *descent_ret,
+ XCharStruct *cs)
+{
+ // Unfortunately, adding XCharStructs together to get the extents for a
+ // string doesn't work: Cocoa uses non-integral character advancements, but
+ // XCharStruct.width is an integer. Plus that doesn't take into account
+ // kerning pairs, alternate glyphs, and fun stuff like the word "Zapfino" in
+ // Zapfino.
+
+ NSString *nsstr = [[[NSString alloc] initWithBytes:s
+ length:length
+ encoding:NSISOLatin1StringEncoding]
+ autorelease];
+ utf8_metrics (f->fid, nsstr, cs);
+ *dir_ret = 0;
+ *ascent_ret = f->ascent;
+ *descent_ret = f->descent;
+ return 0;
+}
+
+int
+XTextWidth (XFontStruct *f, const char *s, int length)
+{
+ int ascent, descent, dir;
+ XCharStruct cs;
+ XTextExtents (f, s, length, &dir, &ascent, &descent, &cs);
+ return cs.width;
+}
+
+
+int
+XTextExtents16 (XFontStruct *f, const XChar2b *s, int length,
+ int *dir_ret, int *ascent_ret, int *descent_ret,
+ XCharStruct *cs)
+{
+ // Bool latin1_p = True;
+ int i, utf8_len = 0;
+ char *utf8 = XChar2b_to_utf8 (s, &utf8_len); // already sanitized
+
+ for (i = 0; i < length; i++)
+ if (s[i].byte1 > 0) {
+ // latin1_p = False;
+ break;
+ }
+
+ {
+ NSString *nsstr = [NSString stringWithCString:utf8
+ encoding:NSUTF8StringEncoding];
+ utf8_metrics (f->fid, nsstr, cs);
+ }
+
+ *dir_ret = 0;
+ *ascent_ret = f->ascent;
+ *descent_ret = f->descent;
+ free (utf8);
+ return 0;
+}
+
+
+/* "Returns the distance in pixels in the primary draw direction from
+ the drawing origin to the origin of the next character to be drawn."
+
+ "overall_ink_return is set to the bbox of the string's character ink."
+
+ "The overall_ink_return for a nondescending, horizontally drawn Latin
+ character is conventionally entirely above the baseline; that is,
+ overall_ink_return.height <= -overall_ink_return.y."
+
+ [So this means that y is the top of the ink, and height grows down:
+ For above-the-baseline characters, y is negative.]
+
+ "The overall_ink_return for a nonkerned character is entirely at, and to
+ the right of, the origin; that is, overall_ink_return.x >= 0."
+
+ [So this means that x is the left of the ink, and width grows right.
+ For left-of-the-origin characters, x is negative.]
+
+ "A character consisting of a single pixel at the origin would set
+ overall_ink_return fields y = 0, x = 0, width = 1, and height = 1."
+ */
+int
+Xutf8TextExtents (XFontSet set, const char *str, int len,
+ XRectangle *overall_ink_return,
+ XRectangle *overall_logical_return)
+{
+ Bool latin1_p;
+ NSString *nsstr = sanitize_utf8 (str, len, &latin1_p);
+ XCharStruct cs;
+
+ utf8_metrics (set->font->fid, nsstr, &cs);
+
+ /* "The overall_logical_return is the bounding box that provides minimum
+ spacing to other graphical features for the string. Other graphical
+ features, for example, a border surrounding the text, should not
+ intersect this rectangle."
+
+ So I think that means they're the same? Or maybe "ink" is the bounding
+ box, and "logical" is the advancement? But then why is the return value
+ the advancement?
+ */
+ if (overall_ink_return)
+ XCharStruct_to_XmbRectangle (cs, *overall_ink_return);
+ if (overall_logical_return)
+ XCharStruct_to_XmbRectangle (cs, *overall_logical_return);
+
+ return cs.width;
+}
+
+
+static int
+draw_string (Display *dpy, Drawable d, GC gc, int x, int y,
+ NSString *nsstr)
+{
+ if (! nsstr) return 1;
+
+ XRectangle wr = d->frame;
+ CGContextRef cgc = d->cgc;
+
+ unsigned long argb = gc->gcv.foreground;
+ if (gc->depth == 1) argb = (argb ? WhitePixel(dpy,0) : BlackPixel(dpy,0));
+ float rgba[4];
+ query_color_float (dpy, argb, rgba);
+ NSColor *fg = [NSColor colorWithDeviceRed:rgba[0]
+ green:rgba[1]
+ blue:rgba[2]
+ alpha:rgba[3]];
+
+ if (!gc->gcv.font) {
+ Assert (0, "no font");
+ return 1;
+ }
+
+ /* This crashes on iOS 5.1 because NSForegroundColorAttributeName,
+ NSFontAttributeName, and NSAttributedString are only present on iOS 6
+ and later. We could resurrect the Quartz code from v5.29 and do a
+ runtime conditional on that, but that would be a pain in the ass.
+ Probably time to just make iOS 6 a requirement.
+ */
+
+ NSDictionary *attr =
+ [NSDictionary dictionaryWithObjectsAndKeys:
+ gc->gcv.font->nsfont, NSFontAttributeName,
+ fg, NSForegroundColorAttributeName,
+ nil];
+
+ // Don't understand why we have to do both set_color and
+ // NSForegroundColorAttributeName, but we do.
+ //
+ set_color (dpy, cgc, argb, 32, NO, YES);
+
+ NSAttributedString *astr = [[NSAttributedString alloc]
+ initWithString:nsstr
+ attributes:attr];
+ CTLineRef dl = CTLineCreateWithAttributedString (
+ (__bridge CFAttributedStringRef) astr);
+
+ // Not sure why this is necessary, but xoff is positive when the first
+ // character on the line has a negative lbearing. Without this, the
+ // string is rendered with the first ink at 0 instead of at lbearing.
+ // I have not seen xoff be negative, so I'm not sure if that can happen.
+ //
+ // Test case: "Combining Double Tilde" U+0360 (\315\240) followed by
+ // a letter.
+ //
+ CGFloat xoff = CTLineGetOffsetForStringIndex (dl, 0, NULL);
+ Assert (xoff >= 0, "unexpected CTLineOffset");
+ x -= xoff;
+
+ CGContextSetTextPosition (cgc,
+ wr.x + x,
+ wr.y + wr.height - y);
+ CGContextSetShouldAntialias (cgc, gc->gcv.antialias_p);
+
+ CTLineDraw (dl, cgc);
+ CFRelease (dl);
+ [astr release];
+
+ invalidate_drawable_cache (d);
+ return 0;
+}
+
+
+int
+XDrawString (Display *dpy, Drawable d, GC gc, int x, int y,
+ const char *str, int len)
+{
+ char *s2 = (char *) malloc (len + 1);
+ strncpy (s2, str, len);
+ s2[len] = 0;
+ NSString *nsstr = [NSString stringWithCString:s2
+ encoding:NSISOLatin1StringEncoding];
+ int ret = draw_string (dpy, d, gc, x, y, nsstr);
+ free (s2);
+ return ret;
+}
+
+
+int
+XDrawString16 (Display *dpy, Drawable d, GC gc, int x, int y,
+ const XChar2b *str, int len)
+{
+ char *s2 = XChar2b_to_utf8 (str, 0); // already sanitized
+ NSString *nsstr =
+ [NSString stringWithCString:s2 encoding:NSUTF8StringEncoding];
+ int ret = draw_string (dpy, d, gc, x, y, nsstr);
+ free (s2);
+ return ret;
+}
+
+
+void
+Xutf8DrawString (Display *dpy, Drawable d, XFontSet set, GC gc,
+ int x, int y, const char *str, int len)
+{
+ char *s2 = (char *) malloc (len + 1);
+ strncpy (s2, str, len);
+ s2[len] = 0;
+ NSString *nsstr = sanitize_utf8 (str, len, 0);
+ draw_string (dpy, d, gc, x, y, nsstr);
+ free (s2);
+}
+
+
+int
+XDrawImageString (Display *dpy, Drawable d, GC gc, int x, int y,
+ const char *str, int len)
+{
+ int ascent, descent, dir;
+ XCharStruct cs;
+ XTextExtents (&gc->gcv.font->metrics, str, len,
+ &dir, &ascent, &descent, &cs);
+ jwxyz_fill_rect (dpy, d, gc,
+ x + MIN (0, cs.lbearing),
+ y - MAX (0, ascent),
+ MAX (MAX (0, cs.rbearing) -
+ MIN (0, cs.lbearing),
+ cs.width),
+ MAX (0, ascent) + MAX (0, descent),
+ gc->gcv.background);
+ return XDrawString (dpy, d, gc, x, y, str, len);
+}
+
+
+int
+XSetClipMask (Display *dpy, GC gc, Pixmap m)
+{
+ Assert (!!gc->gcv.clip_mask == !!gc->clip_mask, "GC clip mask mixup");
+
+ if (gc->gcv.clip_mask) {
+ XFreePixmap (dpy, gc->gcv.clip_mask);
+ CGImageRelease (gc->clip_mask);
+ }
+
+ gc->gcv.clip_mask = copy_pixmap (dpy, m);
+ if (gc->gcv.clip_mask)
+ gc->clip_mask =
+ CGBitmapContextCreateImage (gc->gcv.clip_mask->cgc);
+ else
+ gc->clip_mask = 0;
+
+ return 0;
+}
+
+int
+XSetClipOrigin (Display *dpy, GC gc, int x, int y)
+{
+ gc->gcv.clip_x_origin = x;
+ gc->gcv.clip_y_origin = y;
+ return 0;
+}
+
+#endif // JWXYZ_QUARTZ -- entire file
projects / xscreensaver / blobdiff