1 /*
2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #import <Accelerate/Accelerate.h> // for vImage_Buffer
27 #import <JavaNativeFoundation/JavaNativeFoundation.h>
28
29 #import "CGGlyphImages.h"
30 #import "CoreTextSupport.h"
31 #import "fontscalerdefs.h" // contains the definition of GlyphInfo struct
32
33 #import "sun_awt_SunHints.h"
34
35 //#define USE_IMAGE_ALIGNED_MEMORY 1
36 //#define CGGI_DEBUG 1
37 //#define CGGI_DEBUG_DUMP 1
38 //#define CGGI_DEBUG_HIT_COUNT 1
39
40 #define PRINT_TX(x) \
41 NSLog(@"(%f, %f, %f, %f, %f, %f)", x.a, x.b, x.c, x.d, x.tx, x.ty);
42
43 /*
44 * The GlyphCanvas is a global shared CGContext that characters are struck into.
45 * For each character, the glyph is struck, copied into a GlyphInfo struct, and
46 * the canvas is cleared for the next glyph.
47 *
48 * If the necessary canvas is too large, the shared one will not be used and a
49 * temporary one will be provided.
50 */
51 @interface CGGI_GlyphCanvas : NSObject {
52 @public
53 CGContextRef context;
54 vImage_Buffer *image;
55 }
56 @end;
57
58 @implementation CGGI_GlyphCanvas
59 @end
60
61
62 #pragma mark --- Debugging Helpers ---
63
64 /*
65 * These debug functions are only compiled when CGGI_DEBUG is activated.
66 * They will print out a full UInt8 canvas and any pixels struck (assuming
67 * the canvas is not too big).
68 *
69 * As another debug feature, the entire canvas will be filled with a light
70 * alpha value so it is easy to see where the glyph painting regions are
71 * at runtime.
72 */
73
74 #ifdef CGGI_DEBUG_DUMP
75 static void
76 DUMP_PIXELS(const char msg[], const UInt8 pixels[],
77 const size_t bytesPerPixel, const int width, const int height)
78 {
79 printf("| %s: (%d, %d)\n", msg, width, height);
80
81 if (width > 80 || height > 80) {
82 printf("| too big\n");
83 return;
84 }
85
86 size_t i, j = 0, k, size = width * height;
87 for (i = 0; i < size; i++) {
88 for (k = 0; k < bytesPerPixel; k++) {
89 if (pixels[i * bytesPerPixel + k] > 0x80) j++;
90 }
91 }
92
93 if (j == 0) {
94 printf("| empty\n");
95 return;
96 }
97
98 printf("|_");
99 int x, y;
100 for (x = 0; x < width; x++) {
101 printf("__");
102 }
103 printf("_\n");
104
105 for (y = 0; y < height; y++) {
106 printf("| ");
107 for (x = 0; x < width; x++) {
108 int p = 0;
109 for(k = 0; k < bytesPerPixel; k++) {
110 p += pixels[(y * width + x) * bytesPerPixel + k];
111 }
112
113 if (p < 0x80) {
114 printf(" ");
115 } else {
116 printf("[]");
117 }
118 }
119 printf(" |\n");
120 }
121 }
122
123 static void
124 DUMP_IMG_PIXELS(const char msg[], const vImage_Buffer *image)
125 {
126 const void *pixels = image->data;
127 const size_t pixelSize = image->rowBytes / image->width;
128 const size_t width = image->width;
129 const size_t height = image->height;
130
131 DUMP_PIXELS(msg, pixels, pixelSize, width, height);
132 }
133
134 static void
135 PRINT_CGSTATES_INFO(const CGContextRef cgRef)
136 {
137 // TODO(cpc): lots of SPI use in this method; remove/rewrite?
138 #if 0
139 CGRect clip = CGContextGetClipBoundingBox(cgRef);
140 fprintf(stderr, " clip: ((%f, %f), (%f, %f))\n",
141 clip.origin.x, clip.origin.y, clip.size.width, clip.size.height);
142
143 CGAffineTransform ctm = CGContextGetCTM(cgRef);
144 fprintf(stderr, " ctm: (%f, %f, %f, %f, %f, %f)\n",
145 ctm.a, ctm.b, ctm.c, ctm.d, ctm.tx, ctm.ty);
146
147 CGAffineTransform txtTx = CGContextGetTextMatrix(cgRef);
148 fprintf(stderr, " txtTx: (%f, %f, %f, %f, %f, %f)\n",
149 txtTx.a, txtTx.b, txtTx.c, txtTx.d, txtTx.tx, txtTx.ty);
150
151 if (CGContextIsPathEmpty(cgRef) == 0) {
152 CGPoint pathpoint = CGContextGetPathCurrentPoint(cgRef);
153 CGRect pathbbox = CGContextGetPathBoundingBox(cgRef);
154 fprintf(stderr, " [pathpoint: (%f, %f)] [pathbbox: ((%f, %f), (%f, %f))]\n",
155 pathpoint.x, pathpoint.y, pathbbox.origin.x, pathbbox.origin.y,
156 pathbbox.size.width, pathbbox.size.width);
157 }
158
159 CGFloat linewidth = CGContextGetLineWidth(cgRef);
160 CGLineCap linecap = CGContextGetLineCap(cgRef);
161 CGLineJoin linejoin = CGContextGetLineJoin(cgRef);
162 CGFloat miterlimit = CGContextGetMiterLimit(cgRef);
163 size_t dashcount = CGContextGetLineDashCount(cgRef);
164 fprintf(stderr, " [linewidth: %f] [linecap: %d] [linejoin: %d] [miterlimit: %f] [dashcount: %lu]\n",
165 linewidth, linecap, linejoin, miterlimit, (unsigned long)dashcount);
166
167 CGFloat smoothness = CGContextGetSmoothness(cgRef);
168 bool antialias = CGContextGetShouldAntialias(cgRef);
169 bool smoothfont = CGContextGetShouldSmoothFonts(cgRef);
170 JRSFontRenderingStyle fRendMode = CGContextGetFontRenderingMode(cgRef);
171 fprintf(stderr, " [smoothness: %f] [antialias: %d] [smoothfont: %d] [fontrenderingmode: %d]\n",
172 smoothness, antialias, smoothfont, fRendMode);
173 #endif
174 }
175 #endif
176
177 #ifdef CGGI_DEBUG
178
179 static void
180 DUMP_GLYPHINFO(const GlyphInfo *info)
181 {
182 printf("size: (%d, %d) pixelSize: %d\n",
183 info->width, info->height, info->rowBytes / info->width);
184 printf("adv: (%f, %f) top: (%f, %f)\n",
185 info->advanceX, info->advanceY, info->topLeftX, info->topLeftY);
186
187 #ifdef CGGI_DEBUG_DUMP
188 DUMP_PIXELS("Glyph Info Struct",
189 info->image, info->rowBytes / info->width,
190 info->width, info->height);
191 #endif
192 }
193
194 #endif
195
196
197 #pragma mark --- Font Rendering Mode Descriptors ---
198
199 static inline void
200 CGGI_CopyARGBPixelToRGBPixel(const UInt32 p, UInt8 *dst)
201 {
202 #if __LITTLE_ENDIAN__
203 *(dst + 2) = 0xFF - (p >> 24 & 0xFF);
204 *(dst + 1) = 0xFF - (p >> 16 & 0xFF);
205 *(dst) = 0xFF - (p >> 8 & 0xFF);
206 #else
207 *(dst) = 0xFF - (p >> 16 & 0xFF);
208 *(dst + 1) = 0xFF - (p >> 8 & 0xFF);
209 *(dst + 2) = 0xFF - (p & 0xFF);
210 #endif
211 }
212
213 static void
214 CGGI_CopyImageFromCanvasToRGBInfo(CGGI_GlyphCanvas *canvas, GlyphInfo *info)
215 {
216 UInt32 *src = (UInt32 *)canvas->image->data;
217 size_t srcRowWidth = canvas->image->width;
218
219 UInt8 *dest = (UInt8 *)info->image;
220 size_t destRowWidth = info->width;
221
222 size_t height = info->height;
223
224 size_t y;
225 for (y = 0; y < height; y++) {
226 size_t destRow = y * destRowWidth * 3;
227 size_t srcRow = y * srcRowWidth;
228
229 size_t x;
230 for (x = 0; x < destRowWidth; x++) {
231 // size_t x3 = x * 3;
232 // UInt32 p = src[srcRow + x];
233 // dest[destRow + x3] = 0xFF - (p >> 16 & 0xFF);
234 // dest[destRow + x3 + 1] = 0xFF - (p >> 8 & 0xFF);
235 // dest[destRow + x3 + 2] = 0xFF - (p & 0xFF);
236 CGGI_CopyARGBPixelToRGBPixel(src[srcRow + x],
237 dest + destRow + x * 3);
238 }
239 }
240 }
241
242 //static void CGGI_copyImageFromCanvasToAlphaInfo
243 //(CGGI_GlyphCanvas *canvas, GlyphInfo *info)
244 //{
245 // vImage_Buffer infoBuffer;
246 // infoBuffer.data = info->image;
247 // infoBuffer.width = info->width;
248 // infoBuffer.height = info->height;
249 // infoBuffer.rowBytes = info->width; // three bytes per RGB pixel
250 //
251 // UInt8 scrapPixel[info->width * info->height];
252 // vImage_Buffer scrapBuffer;
253 // scrapBuffer.data = &scrapPixel;
254 // scrapBuffer.width = info->width;
255 // scrapBuffer.height = info->height;
256 // scrapBuffer.rowBytes = info->width;
257 //
258 // vImageConvert_ARGB8888toPlanar8(canvas->image, &infoBuffer,
259 // &scrapBuffer, &scrapBuffer, &scrapBuffer, kvImageNoFlags);
260 //}
261
262 static inline UInt8
263 CGGI_ConvertPixelToGreyBit(UInt32 p)
264 {
265 #ifdef __LITTLE_ENDIAN__
266 return 0xFF - ((p >> 24 & 0xFF) + (p >> 16 & 0xFF) + (p >> 8 & 0xFF)) / 3;
267 #else
268 return 0xFF - ((p >> 16 & 0xFF) + (p >> 8 & 0xFF) + (p & 0xFF)) / 3;
269 #endif
270 }
271
272 static void
273 CGGI_CopyImageFromCanvasToAlphaInfo(CGGI_GlyphCanvas *canvas, GlyphInfo *info)
274 {
275 UInt32 *src = (UInt32 *)canvas->image->data;
276 size_t srcRowWidth = canvas->image->width;
277
278 UInt8 *dest = (UInt8 *)info->image;
279 size_t destRowWidth = info->width;
280
281 size_t height = info->height;
282
283 size_t y;
284 for (y = 0; y < height; y++) {
285 size_t destRow = y * destRowWidth;
286 size_t srcRow = y * srcRowWidth;
287
288 size_t x;
289 for (x = 0; x < destRowWidth; x++) {
290 UInt32 p = src[srcRow + x];
291 dest[destRow + x] = CGGI_ConvertPixelToGreyBit(p);
292 }
293 }
294 }
295
296
297 #pragma mark --- Pixel Size, Modes, and Canvas Shaping Helper Functions ---
298
299 typedef struct CGGI_GlyphInfoDescriptor {
300 size_t pixelSize;
301 void (*copyFxnPtr)(CGGI_GlyphCanvas *canvas, GlyphInfo *info);
302 } CGGI_GlyphInfoDescriptor;
303
304 typedef struct CGGI_RenderingMode {
305 CGGI_GlyphInfoDescriptor *glyphDescriptor;
306 JRSFontRenderingStyle cgFontMode;
307 } CGGI_RenderingMode;
308
309 static CGGI_GlyphInfoDescriptor grey =
310 { 1, &CGGI_CopyImageFromCanvasToAlphaInfo };
311 static CGGI_GlyphInfoDescriptor rgb =
312 { 3, &CGGI_CopyImageFromCanvasToRGBInfo };
313
314 static inline CGGI_RenderingMode
315 CGGI_GetRenderingMode(const AWTStrike *strike)
316 {
317 CGGI_RenderingMode mode;
318 mode.cgFontMode = strike->fStyle;
319
320 switch (strike->fAAStyle) {
321 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_DEFAULT:
322 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_OFF:
323 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_ON:
324 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_GASP:
325 default:
326 mode.glyphDescriptor = &grey;
327 break;
328 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_HRGB:
329 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_HBGR:
330 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_VRGB:
331 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_VBGR:
332 mode.glyphDescriptor = &rgb;
333 break;
334 }
335
336 return mode;
337 }
338
339
340 #pragma mark --- Canvas Managment ---
341
342 /*
343 * Creates a new canvas of a fixed size, and initializes the CGContext as
344 * an 32-bit ARGB BitmapContext with some generic RGB color space.
345 */
346 static inline void
347 CGGI_InitCanvas(CGGI_GlyphCanvas *canvas,
348 const vImagePixelCount width, const vImagePixelCount height)
349 {
350 // our canvas is *always* 4-byte ARGB
351 size_t bytesPerRow = width * sizeof(UInt32);
352 size_t byteCount = bytesPerRow * height;
353
354 canvas->image = malloc(sizeof(vImage_Buffer));
355 canvas->image->width = width;
356 canvas->image->height = height;
357 canvas->image->rowBytes = bytesPerRow;
358
359 canvas->image->data = (void *)calloc(byteCount, sizeof(UInt32));
360 if (canvas->image->data == NULL) {
361 [[NSException exceptionWithName:NSMallocException
362 reason:@"Failed to allocate memory for the buffer which backs the CGContext for glyph strikes." userInfo:nil] raise];
363 }
364
365 CGColorSpaceRef colorSpace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
366 canvas->context = CGBitmapContextCreate(canvas->image->data,
367 width, height, 8, bytesPerRow,
368 colorSpace,
369 kCGImageAlphaPremultipliedFirst);
370
371 CGContextSetRGBFillColor(canvas->context, 0.0f, 0.0f, 0.0f, 1.0f);
372 CGContextSetFontSize(canvas->context, 1);
373 CGContextSaveGState(canvas->context);
374
375 CGColorSpaceRelease(colorSpace);
376 }
377
378 /*
379 * Releases the BitmapContext and the associated memory backing it.
380 */
381 static inline void
382 CGGI_FreeCanvas(CGGI_GlyphCanvas *canvas)
383 {
384 if (canvas->context != NULL) {
385 CGContextRelease(canvas->context);
386 }
387
388 if (canvas->image != NULL) {
389 if (canvas->image->data != NULL) {
390 free(canvas->image->data);
391 }
392 free(canvas->image);
393 }
394 }
395
396 /*
397 * This is the slack space that is preallocated for the global GlyphCanvas
398 * when it needs to be expanded. It has been set somewhat liberally to
399 * avoid re-upsizing frequently.
400 */
401 #define CGGI_GLYPH_CANVAS_SLACK 2.5
402
403 /*
404 * Quick and easy inline to check if this canvas is big enough.
405 */
406 static inline void
407 CGGI_SizeCanvas(CGGI_GlyphCanvas *canvas, const vImagePixelCount width, const vImagePixelCount height, const JRSFontRenderingStyle style)
408 {
409 if (canvas->image != NULL &&
410 width < canvas->image->width &&
411 height < canvas->image->height)
412 {
413 return;
414 }
415
416 // if we don't have enough space to strike the largest glyph in the
417 // run, resize the canvas
418 CGGI_FreeCanvas(canvas);
419 CGGI_InitCanvas(canvas,
420 width * CGGI_GLYPH_CANVAS_SLACK,
421 height * CGGI_GLYPH_CANVAS_SLACK);
422 JRSFontSetRenderingStyleOnContext(canvas->context, style);
423 }
424
425 /*
426 * Clear the canvas by blitting white only into the region of interest
427 * (the rect which we will copy out of once the glyph is struck).
428 */
429 static inline void
430 CGGI_ClearCanvas(CGGI_GlyphCanvas *canvas, GlyphInfo *info)
431 {
432 vImage_Buffer canvasRectToClear;
433 canvasRectToClear.data = canvas->image->data;
434 canvasRectToClear.height = info->height;
435 canvasRectToClear.width = info->width;
436 // use the row stride of the canvas, not the info
437 canvasRectToClear.rowBytes = canvas->image->rowBytes;
438
439 // clean the canvas
440 #ifdef CGGI_DEBUG
441 Pixel_8888 opaqueWhite = { 0xE0, 0xE0, 0xE0, 0xE0 };
442 #else
443 Pixel_8888 opaqueWhite = { 0xFF, 0xFF, 0xFF, 0xFF };
444 #endif
445
446 vImageBufferFill_ARGB8888(&canvasRectToClear, opaqueWhite, kvImageNoFlags);
447 }
448
449
450 #pragma mark --- GlyphInfo Creation & Copy Functions ---
451
452 /*
453 * Creates a GlyphInfo with exactly the correct size image and measurements.
454 */
455 #define CGGI_GLYPH_BBOX_PADDING 2.0f
456 static inline GlyphInfo *
457 CGGI_CreateNewGlyphInfoFrom(CGSize advance, CGRect bbox,
458 const AWTStrike *strike,
459 const CGGI_RenderingMode *mode)
460 {
461 size_t pixelSize = mode->glyphDescriptor->pixelSize;
462
463 // adjust the bounding box to be 1px bigger on each side than what
464 // CGFont-whatever suggests - because it gives a bounding box that
465 // is too tight
466 bbox.size.width += CGGI_GLYPH_BBOX_PADDING * 2.0f;
467 bbox.size.height += CGGI_GLYPH_BBOX_PADDING * 2.0f;
468 bbox.origin.x -= CGGI_GLYPH_BBOX_PADDING;
469 bbox.origin.y -= CGGI_GLYPH_BBOX_PADDING;
470
471 vImagePixelCount width = ceilf(bbox.size.width);
472 vImagePixelCount height = ceilf(bbox.size.height);
473
474 // if the glyph is larger than 1MB, don't even try...
475 // the GlyphVector path should have taken over by now
476 // and zero pixels is ok
477 if (width * height > 1024 * 1024) {
478 width = 1;
479 height = 1;
480 }
481 advance = CGSizeApplyAffineTransform(advance, strike->fFontTx);
482 if (!JRSFontStyleUsesFractionalMetrics(strike->fStyle)) {
483 advance.width = round(advance.width);
484 advance.height = round(advance.height);
485 }
486 advance = CGSizeApplyAffineTransform(advance, strike->fDevTx);
487
488 #ifdef USE_IMAGE_ALIGNED_MEMORY
489 // create separate memory
490 GlyphInfo *glyphInfo = (GlyphInfo *)malloc(sizeof(GlyphInfo));
491 void *image = (void *)malloc(height * width * pixelSize);
492 #else
493 // create a GlyphInfo struct fused to the image it points to
494 GlyphInfo *glyphInfo = (GlyphInfo *)malloc(sizeof(GlyphInfo) +
495 height * width * pixelSize);
496 #endif
497
498 glyphInfo->advanceX = advance.width;
499 glyphInfo->advanceY = advance.height;
500 glyphInfo->topLeftX = round(bbox.origin.x);
501 glyphInfo->topLeftY = round(bbox.origin.y);
502 glyphInfo->width = width;
503 glyphInfo->height = height;
504 glyphInfo->rowBytes = width * pixelSize;
505 glyphInfo->cellInfo = NULL;
506
507 #ifdef USE_IMAGE_ALIGNED_MEMORY
508 glyphInfo->image = image;
509 #else
510 glyphInfo->image = ((void *)glyphInfo) + sizeof(GlyphInfo);
511 #endif
512
513 return glyphInfo;
514 }
515
516
517 #pragma mark --- Glyph Striking onto Canvas ---
518
519 /*
520 * Clears the canvas, strikes the glyph with CoreGraphics, and then
521 * copies the struck pixels into the GlyphInfo image.
522 */
523 static inline void
524 CGGI_CreateImageForGlyph
525 (CGGI_GlyphCanvas *canvas, const CGGlyph glyph,
526 GlyphInfo *info, const CGGI_RenderingMode *mode)
527 {
528 // clean the canvas
529 CGGI_ClearCanvas(canvas, info);
530
531 // strike the glyph in the upper right corner
532 CGContextShowGlyphsAtPoint(canvas->context,
533 -info->topLeftX,
534 canvas->image->height + info->topLeftY,
535 &glyph, 1);
536
537 // copy the glyph from the canvas into the info
538 (*mode->glyphDescriptor->copyFxnPtr)(canvas, info);
539 }
540
541 /*
542 * CoreText path...
543 */
544 static inline GlyphInfo *
545 CGGI_CreateImageForUnicode
546 (CGGI_GlyphCanvas *canvas, const AWTStrike *strike,
547 const CGGI_RenderingMode *mode, const UniChar uniChar)
548 {
549 // save the state of the world
550 CGContextSaveGState(canvas->context);
551
552 // get the glyph, measure it using CG
553 CGGlyph glyph;
554 CTFontRef fallback;
555 if (uniChar > 0xFFFF) {
556 UTF16Char charRef[2];
557 CTS_BreakupUnicodeIntoSurrogatePairs(uniChar, charRef);
558 CGGlyph glyphTmp[2];
559 fallback = CTS_CopyCTFallbackFontAndGlyphForUnicode(strike->fAWTFont, (const UTF16Char *)&charRef, (CGGlyph *)&glyphTmp, 2);
560 glyph = glyphTmp[0];
561 } else {
562 UTF16Char charRef;
563 charRef = (UTF16Char) uniChar; // truncate.
564 fallback = CTS_CopyCTFallbackFontAndGlyphForUnicode(strike->fAWTFont, (const UTF16Char *)&charRef, &glyph, 1);
565 }
566
567 CGAffineTransform tx = strike->fTx;
568 JRSFontRenderingStyle style = JRSFontAlignStyleForFractionalMeasurement(strike->fStyle);
569
570 CGRect bbox;
571 JRSFontGetBoundingBoxesForGlyphsAndStyle(fallback, &tx, style, &glyph, 1, &bbox);
572
573 CGSize advance;
574 CTFontGetAdvancesForGlyphs(fallback, kCTFontDefaultOrientation, &glyph, &advance, 1);
575
576 // create the Sun2D GlyphInfo we are going to strike into
577 GlyphInfo *info = CGGI_CreateNewGlyphInfoFrom(advance, bbox, strike, mode);
578
579 // fix the context size, just in case the substituted character is unexpectedly large
580 CGGI_SizeCanvas(canvas, info->width, info->height, mode->cgFontMode);
581
582 // align the transform for the real CoreText strike
583 CGContextSetTextMatrix(canvas->context, strike->fAltTx);
584
585 const CGFontRef cgFallback = CTFontCopyGraphicsFont(fallback, NULL);
586 CGContextSetFont(canvas->context, cgFallback);
587 CFRelease(cgFallback);
588
589 // clean the canvas - align, strike, and copy the glyph from the canvas into the info
590 CGGI_CreateImageForGlyph(canvas, glyph, info, mode);
591
592 // restore the state of the world
593 CGContextRestoreGState(canvas->context);
594
595 CFRelease(fallback);
596 #ifdef CGGI_DEBUG
597 DUMP_GLYPHINFO(info);
598 #endif
599
600 #ifdef CGGI_DEBUG_DUMP
601 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image);
602 #if 0
603 PRINT_CGSTATES_INFO(NULL);
604 #endif
605 #endif
606
607 return info;
608 }
609
610
611 #pragma mark --- GlyphInfo Filling and Canvas Managment ---
612
613 /*
614 * Sets all the per-run properties for the canvas, and then iterates through
615 * the character run, and creates images in the GlyphInfo structs.
616 *
617 * Not inlined because it would create two copies in the function below
618 */
619 static void
620 CGGI_FillImagesForGlyphsWithSizedCanvas(CGGI_GlyphCanvas *canvas,
621 const AWTStrike *strike,
622 const CGGI_RenderingMode *mode,
623 jlong glyphInfos[],
624 const UniChar uniChars[],
625 const CGGlyph glyphs[],
626 const CFIndex len)
627 {
628 CGContextSetTextMatrix(canvas->context, strike->fAltTx);
629
630 CGContextSetFont(canvas->context, strike->fAWTFont->fNativeCGFont);
631 JRSFontSetRenderingStyleOnContext(canvas->context, strike->fStyle);
632
633 CFIndex i;
634 for (i = 0; i < len; i++) {
635 GlyphInfo *info = (GlyphInfo *)jlong_to_ptr(glyphInfos[i]);
636 if (info != NULL) {
637 CGGI_CreateImageForGlyph(canvas, glyphs[i], info, mode);
638 } else {
639 info = CGGI_CreateImageForUnicode(canvas, strike, mode, uniChars[i]);
640 glyphInfos[i] = ptr_to_jlong(info);
641 }
642 #ifdef CGGI_DEBUG
643 DUMP_GLYPHINFO(info);
644 #endif
645
646 #ifdef CGGI_DEBUG_DUMP
647 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image);
648 #endif
649 }
650 #ifdef CGGI_DEBUG_DUMP
651 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image);
652 PRINT_CGSTATES_INFO(canvas->context);
653 #endif
654 }
655
656 static NSString *threadLocalCanvasKey =
657 @"Java CoreGraphics Text Renderer Cached Canvas";
658
659 /*
660 * This is the maximum length and height times the above slack squared
661 * to determine if we go with the global canvas, or malloc one on the spot.
662 */
663 #define CGGI_GLYPH_CANVAS_MAX 100
664
665 /*
666 * Based on the space needed to strike the largest character in the run,
667 * either use the global shared canvas, or make one up on the spot, strike
668 * the glyphs, and destroy it.
669 */
670 static inline void
671 CGGI_FillImagesForGlyphs(jlong *glyphInfos, const AWTStrike *strike,
672 const CGGI_RenderingMode *mode,
673 const UniChar uniChars[], const CGGlyph glyphs[],
674 const size_t maxWidth, const size_t maxHeight,
675 const CFIndex len)
676 {
677 if (maxWidth*maxHeight*CGGI_GLYPH_CANVAS_SLACK*CGGI_GLYPH_CANVAS_SLACK >
678 CGGI_GLYPH_CANVAS_MAX*CGGI_GLYPH_CANVAS_MAX*CGGI_GLYPH_CANVAS_SLACK*CGGI_GLYPH_CANVAS_SLACK)
679 {
680 CGGI_GlyphCanvas *tmpCanvas = [[CGGI_GlyphCanvas alloc] init];
681 CGGI_InitCanvas(tmpCanvas, maxWidth, maxHeight);
682 CGGI_FillImagesForGlyphsWithSizedCanvas(tmpCanvas, strike,
683 mode, glyphInfos, uniChars,
684 glyphs, len);
685 CGGI_FreeCanvas(tmpCanvas);
686
687 [tmpCanvas release];
688 return;
689 }
690
691 NSMutableDictionary *threadDict =
692 [[NSThread currentThread] threadDictionary];
693 CGGI_GlyphCanvas *canvas = [threadDict objectForKey:threadLocalCanvasKey];
694 if (canvas == nil) {
695 canvas = [[CGGI_GlyphCanvas alloc] init];
696 [threadDict setObject:canvas forKey:threadLocalCanvasKey];
697 }
698
699 CGGI_SizeCanvas(canvas, maxWidth, maxHeight, mode->cgFontMode);
700 CGGI_FillImagesForGlyphsWithSizedCanvas(canvas, strike, mode,
701 glyphInfos, uniChars, glyphs, len);
702 }
703
704 /*
705 * Finds the advances and bounding boxes of the characters in the run,
706 * cycles through all the bounds and calculates the maximum canvas space
707 * required by the largest glyph.
708 *
709 * Creates a GlyphInfo struct with a malloc that also encapsulates the
710 * image the struct points to. This is done to meet memory layout
711 * expectations in the Sun text rasterizer memory managment code.
712 * The image immediately follows the struct physically in memory.
713 */
714 static inline void
715 CGGI_CreateGlyphInfos(jlong *glyphInfos, const AWTStrike *strike,
716 const CGGI_RenderingMode *mode,
717 const UniChar uniChars[], const CGGlyph glyphs[],
718 CGSize advances[], CGRect bboxes[], const CFIndex len)
719 {
720 AWTFont *font = strike->fAWTFont;
721 CGAffineTransform tx = strike->fTx;
722 JRSFontRenderingStyle bboxCGMode = JRSFontAlignStyleForFractionalMeasurement(strike->fStyle);
723
724 JRSFontGetBoundingBoxesForGlyphsAndStyle((CTFontRef)font->fFont, &tx, bboxCGMode, glyphs, len, bboxes);
725 CTFontGetAdvancesForGlyphs((CTFontRef)font->fFont, kCTFontDefaultOrientation, glyphs, advances, len);
726
727 size_t maxWidth = 1;
728 size_t maxHeight = 1;
729
730 CFIndex i;
731 for (i = 0; i < len; i++)
732 {
733 if (uniChars[i] != 0)
734 {
735 glyphInfos[i] = 0L;
736 continue; // will be handled later
737 }
738
739 CGSize advance = advances[i];
740 CGRect bbox = bboxes[i];
741
742 GlyphInfo *glyphInfo = CGGI_CreateNewGlyphInfoFrom(advance, bbox, strike, mode);
743
744 if (maxWidth < glyphInfo->width) maxWidth = glyphInfo->width;
745 if (maxHeight < glyphInfo->height) maxHeight = glyphInfo->height;
746
747 glyphInfos[i] = ptr_to_jlong(glyphInfo);
748 }
749
750 CGGI_FillImagesForGlyphs(glyphInfos, strike, mode, uniChars,
751 glyphs, maxWidth, maxHeight, len);
752 }
753
754
755 #pragma mark --- Temporary Buffer Allocations and Initialization ---
756
757 /*
758 * This stage separates the already valid glyph codes from the unicode values
759 * that need special handling - the rawGlyphCodes array is no longer used
760 * after this stage.
761 */
762 static void
763 CGGI_CreateGlyphsAndScanForComplexities(jlong *glyphInfos,
764 const AWTStrike *strike,
765 const CGGI_RenderingMode *mode,
766 jint rawGlyphCodes[],
767 UniChar uniChars[], CGGlyph glyphs[],
768 CGSize advances[], CGRect bboxes[],
769 const CFIndex len)
770 {
771 CFIndex i;
772 for (i = 0; i < len; i++) {
773 jint code = rawGlyphCodes[i];
774 if (code < 0) {
775 glyphs[i] = 0;
776 uniChars[i] = -code;
777 } else {
778 glyphs[i] = code;
779 uniChars[i] = 0;
780 }
781 }
782
783 CGGI_CreateGlyphInfos(glyphInfos, strike, mode,
784 uniChars, glyphs, advances, bboxes, len);
785
786 #ifdef CGGI_DEBUG_HIT_COUNT
787 static size_t hitCount = 0;
788 hitCount++;
789 printf("%d\n", (int)hitCount);
790 #endif
791 }
792
793 /*
794 * Conditionally stack allocates buffers for glyphs, bounding boxes,
795 * and advances. Unfortunately to use CG or CT in bulk runs (which is
796 * faster than calling them per character), we have to copy into and out
797 * of these buffers. Still a net win though.
798 */
799 void
800 CGGlyphImages_GetGlyphImagePtrs(jlong glyphInfos[],
801 const AWTStrike *strike,
802 jint rawGlyphCodes[], const CFIndex len)
803 {
804 const CGGI_RenderingMode mode = CGGI_GetRenderingMode(strike);
805
806 if (len < MAX_STACK_ALLOC_GLYPH_BUFFER_SIZE) {
807 CGRect bboxes[len];
808 CGSize advances[len];
809 CGGlyph glyphs[len];
810 UniChar uniChars[len];
811
812 CGGI_CreateGlyphsAndScanForComplexities(glyphInfos, strike, &mode,
813 rawGlyphCodes, uniChars, glyphs,
814 advances, bboxes, len);
815
816 return;
817 }
818
819 // just do one malloc, and carve it up for all the buffers
820 void *buffer = malloc(sizeof(CGRect) * sizeof(CGSize) *
821 sizeof(CGGlyph) * sizeof(UniChar) * len);
822 if (buffer == NULL) {
823 [[NSException exceptionWithName:NSMallocException
824 reason:@"Failed to allocate memory for the temporary glyph strike and measurement buffers." userInfo:nil] raise];
825 }
826
827 CGRect *bboxes = (CGRect *)(buffer);
828 CGSize *advances = (CGSize *)(bboxes + sizeof(CGRect) * len);
829 CGGlyph *glyphs = (CGGlyph *)(advances + sizeof(CGGlyph) * len);
830 UniChar *uniChars = (UniChar *)(glyphs + sizeof(UniChar) * len);
831
832 CGGI_CreateGlyphsAndScanForComplexities(glyphInfos, strike, &mode,
833 rawGlyphCodes, uniChars, glyphs,
834 advances, bboxes, len);
835
836 free(buffer);
837 }