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 static Int32 reverseGamma = 0;
199
200 static UInt8 reverseGammaLut[256] = { 0 };
201
202 static inline UInt8* getReverseGammaLut() {
203 if (reverseGamma == 0) {
204 // initialize gamma lut
205 double gamma;
206 const char* pGammaEnv = getenv("J2D_LCD_REVERSE_GAMMA");
207 if (pGammaEnv != NULL) {
208 reverseGamma = atol(pGammaEnv);
209 }
210
211 if (reverseGamma < 100 || reverseGamma > 250) {
212 reverseGamma = 180;
213 }
214
215 gamma = 100.0 / reverseGamma;
216 for (int i = 0; i < 256; i++) {
217 double x = ((double)i) / 255.0;
218 reverseGammaLut[i] = (UInt8)(255 * pow(x, gamma));
219 }
220 }
221 return reverseGammaLut;
222 }
223
224 static inline void
225 CGGI_CopyARGBPixelToRGBPixel(const UInt32 p, UInt8 *dst)
226 {
227 UInt8* lut = getReverseGammaLut();
228
229 *(dst + 0) = lut[0xFF - (p >> 16 & 0xFF)]; // red
230 *(dst + 1) = lut[0xFF - (p >> 8 & 0xFF)]; // green
231 *(dst + 2) = lut[0xFF - (p & 0xFF)]; // blue
232 }
233
234 static void
235 CGGI_CopyImageFromCanvasToRGBInfo(CGGI_GlyphCanvas *canvas, GlyphInfo *info)
236 {
237 UInt32 *src = (UInt32 *)canvas->image->data;
238 size_t srcRowWidth = canvas->image->width;
239
240 UInt8 *dest = (UInt8 *)info->image;
241 size_t destRowWidth = info->width;
242
243 size_t height = info->height;
244
245 size_t y;
246
247 // fill empty glyph image with black-on-white glyph
248 for (y = 0; y < height; y++) {
249 size_t destRow = y * destRowWidth * 3;
250 size_t srcRow = y * srcRowWidth;
251
252 size_t x;
253 for (x = 0; x < destRowWidth; x++) {
254 CGGI_CopyARGBPixelToRGBPixel(src[srcRow + x],
255 dest + destRow + x * 3);
256 }
257 }
258 }
259
260 //static void CGGI_copyImageFromCanvasToAlphaInfo
261 //(CGGI_GlyphCanvas *canvas, GlyphInfo *info)
262 //{
263 // vImage_Buffer infoBuffer;
264 // infoBuffer.data = info->image;
265 // infoBuffer.width = info->width;
266 // infoBuffer.height = info->height;
267 // infoBuffer.rowBytes = info->width; // three bytes per RGB pixel
268 //
269 // UInt8 scrapPixel[info->width * info->height];
270 // vImage_Buffer scrapBuffer;
271 // scrapBuffer.data = &scrapPixel;
272 // scrapBuffer.width = info->width;
273 // scrapBuffer.height = info->height;
274 // scrapBuffer.rowBytes = info->width;
275 //
276 // vImageConvert_ARGB8888toPlanar8(canvas->image, &infoBuffer,
277 // &scrapBuffer, &scrapBuffer, &scrapBuffer, kvImageNoFlags);
278 //}
279
280 static inline UInt8
281 CGGI_ConvertBWPixelToByteGray(UInt32 p)
282 {
283 return 0xFF - (((p >> 24 & 0xFF) + (p >> 16 & 0xFF) + (p >> 8 & 0xFF)) / 3);
284 }
285
286 static void
287 CGGI_CopyImageFromCanvasToAlphaInfo(CGGI_GlyphCanvas *canvas, GlyphInfo *info)
288 {
289 UInt32 *src = (UInt32 *)canvas->image->data;
290 size_t srcRowWidth = canvas->image->width;
291
292 UInt8 *dest = (UInt8 *)info->image;
293 size_t destRowWidth = info->width;
294
295 size_t height = info->height;
296
297 size_t y;
298
299 // fill empty glyph image with black-on-white glyph
300 for (y = 0; y < height; y++) {
301 size_t destRow = y * destRowWidth;
302 size_t srcRow = y * srcRowWidth;
303 size_t x;
304 for (x = 0; x < destRowWidth; x++) {
305 UInt32 p = src[srcRow + x];
306 dest[destRow + x] = CGGI_ConvertBWPixelToByteGray(p);
307 }
308 }
309 }
310
311
312 #pragma mark --- Pixel Size, Modes, and Canvas Shaping Helper Functions ---
313
314 typedef struct CGGI_GlyphInfoDescriptor {
315 size_t pixelSize;
316 void (*copyFxnPtr)(CGGI_GlyphCanvas *canvas, GlyphInfo *info);
317 } CGGI_GlyphInfoDescriptor;
318
319 typedef struct CGGI_RenderingMode {
320 CGGI_GlyphInfoDescriptor *glyphDescriptor;
321 JRSFontRenderingStyle cgFontMode;
322 } CGGI_RenderingMode;
323
324 static CGGI_GlyphInfoDescriptor grey =
325 { 1, &CGGI_CopyImageFromCanvasToAlphaInfo };
326 static CGGI_GlyphInfoDescriptor rgb =
327 { 3, &CGGI_CopyImageFromCanvasToRGBInfo };
328
329 static inline CGGI_RenderingMode
330 CGGI_GetRenderingMode(const AWTStrike *strike)
331 {
332 CGGI_RenderingMode mode;
333 mode.cgFontMode = strike->fStyle;
334 NSException *e = nil;
335
336 switch (strike->fAAStyle) {
337 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_OFF:
338 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_ON:
339 mode.glyphDescriptor = &grey;
340 break;
341 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_HRGB:
342 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_HBGR:
343 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_VRGB:
344 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_VBGR:
345 mode.glyphDescriptor = &rgb;
346 break;
347 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_GASP:
348 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_DEFAULT:
349 default:
350 /* we expect that text antialiasing hint has been already
351 * evaluated. Report an error if we get 'unevaluated' hint here.
352 */
353 e = [NSException
354 exceptionWithName:@"IllegalArgumentException"
355 reason:@"Invalid hint value"
356 userInfo:nil];
357 @throw e;
358 }
359
360 return mode;
361 }
362
363
364 #pragma mark --- Canvas Managment ---
365
366 /*
367 * Creates a new canvas of a fixed size, and initializes the CGContext as
368 * an 32-bit ARGB BitmapContext with some generic RGB color space.
369 */
370 static inline void
371 CGGI_InitCanvas(CGGI_GlyphCanvas *canvas,
372 const vImagePixelCount width, const vImagePixelCount height,
373 const CGGI_RenderingMode* mode)
374 {
375 // our canvas is *always* 4-byte ARGB
376 size_t bytesPerRow = width * sizeof(UInt32);
377 size_t byteCount = bytesPerRow * height;
378
379 canvas->image = malloc(sizeof(vImage_Buffer));
380 canvas->image->width = width;
381 canvas->image->height = height;
382 canvas->image->rowBytes = bytesPerRow;
383
384 canvas->image->data = (void *)calloc(byteCount, sizeof(UInt8));
385 if (canvas->image->data == NULL) {
386 [[NSException exceptionWithName:NSMallocException
387 reason:@"Failed to allocate memory for the buffer which backs the CGContext for glyph strikes." userInfo:nil] raise];
388 }
389
390 uint32_t bmpInfo = kCGImageAlphaPremultipliedFirst;
391 if (mode->glyphDescriptor == &rgb) {
392 bmpInfo |= kCGBitmapByteOrder32Host;
393 }
394
395 CGColorSpaceRef colorSpace = CGColorSpaceCreateWithName(kCGColorSpaceSRGB);
396 canvas->context = CGBitmapContextCreate(canvas->image->data,
397 width, height, 8, bytesPerRow,
398 colorSpace,
399 bmpInfo);
400
401 // set foreground color
402 CGContextSetRGBFillColor(canvas->context, 0.0f, 0.0f, 0.0f, 1.0f);
403
404 CGContextSetFontSize(canvas->context, 1);
405 CGContextSaveGState(canvas->context);
406
407 CGColorSpaceRelease(colorSpace);
408 }
409
410 /*
411 * Releases the BitmapContext and the associated memory backing it.
412 */
413 static inline void
414 CGGI_FreeCanvas(CGGI_GlyphCanvas *canvas)
415 {
416 if (canvas->context != NULL) {
417 CGContextRelease(canvas->context);
418 }
419
420 if (canvas->image != NULL) {
421 if (canvas->image->data != NULL) {
422 free(canvas->image->data);
423 }
424 free(canvas->image);
425 }
426 }
427
428 /*
429 * This is the slack space that is preallocated for the global GlyphCanvas
430 * when it needs to be expanded. It has been set somewhat liberally to
431 * avoid re-upsizing frequently.
432 */
433 #define CGGI_GLYPH_CANVAS_SLACK 2.5
434
435 /*
436 * Quick and easy inline to check if this canvas is big enough.
437 */
438 static inline void
439 CGGI_SizeCanvas(CGGI_GlyphCanvas *canvas, const vImagePixelCount width,
440 const vImagePixelCount height,
441 const CGGI_RenderingMode* mode)
442 {
443 if (canvas->image != NULL &&
444 width < canvas->image->width &&
445 height < canvas->image->height)
446 {
447 return;
448 }
449
450 // if we don't have enough space to strike the largest glyph in the
451 // run, resize the canvas
452 CGGI_FreeCanvas(canvas);
453 CGGI_InitCanvas(canvas,
454 width * CGGI_GLYPH_CANVAS_SLACK,
455 height * CGGI_GLYPH_CANVAS_SLACK,
456 mode);
457 JRSFontSetRenderingStyleOnContext(canvas->context, mode->cgFontMode);
458 }
459
460 /*
461 * Clear the canvas by blitting white only into the region of interest
462 * (the rect which we will copy out of once the glyph is struck).
463 */
464 static inline void
465 CGGI_ClearCanvas(CGGI_GlyphCanvas *canvas, GlyphInfo *info)
466 {
467 vImage_Buffer canvasRectToClear;
468 canvasRectToClear.data = canvas->image->data;
469 canvasRectToClear.height = info->height;
470 canvasRectToClear.width = info->width;
471 // use the row stride of the canvas, not the info
472 canvasRectToClear.rowBytes = canvas->image->rowBytes;
473
474 // clean the canvas
475 #ifdef CGGI_DEBUG
476 Pixel_8888 opaqueWhite = { 0xE0, 0xE0, 0xE0, 0xE0 };
477 #else
478 Pixel_8888 opaqueWhite = { 0xFF, 0xFF, 0xFF, 0xFF };
479 #endif
480
481 // clear canvas background and set foreground color
482 vImageBufferFill_ARGB8888(&canvasRectToClear, opaqueWhite, kvImageNoFlags);
483 }
484
485
486 #pragma mark --- GlyphInfo Creation & Copy Functions ---
487
488 /*
489 * Creates a GlyphInfo with exactly the correct size image and measurements.
490 */
491 #define CGGI_GLYPH_BBOX_PADDING 2.0f
492 static inline GlyphInfo *
493 CGGI_CreateNewGlyphInfoFrom(CGSize advance, CGRect bbox,
494 const AWTStrike *strike,
495 const CGGI_RenderingMode *mode)
496 {
497 size_t pixelSize = mode->glyphDescriptor->pixelSize;
498
499 // adjust the bounding box to be 1px bigger on each side than what
500 // CGFont-whatever suggests - because it gives a bounding box that
501 // is too tight
502 bbox.size.width += CGGI_GLYPH_BBOX_PADDING * 2.0f;
503 bbox.size.height += CGGI_GLYPH_BBOX_PADDING * 2.0f;
504 bbox.origin.x -= CGGI_GLYPH_BBOX_PADDING;
505 bbox.origin.y -= CGGI_GLYPH_BBOX_PADDING;
506
507 vImagePixelCount width = ceilf(bbox.size.width);
508 vImagePixelCount height = ceilf(bbox.size.height);
509
510 // if the glyph is larger than 1MB, don't even try...
511 // the GlyphVector path should have taken over by now
512 // and zero pixels is ok
513 if (width * height > 1024 * 1024) {
514 width = 1;
515 height = 1;
516 }
517 advance = CGSizeApplyAffineTransform(advance, strike->fFontTx);
518 if (!JRSFontStyleUsesFractionalMetrics(strike->fStyle)) {
519 advance.width = round(advance.width);
520 advance.height = round(advance.height);
521 }
522 advance = CGSizeApplyAffineTransform(advance, strike->fDevTx);
523
524 #ifdef USE_IMAGE_ALIGNED_MEMORY
525 // create separate memory
526 GlyphInfo *glyphInfo = (GlyphInfo *)malloc(sizeof(GlyphInfo));
527 void *image = (void *)malloc(height * width * pixelSize);
528 #else
529 // create a GlyphInfo struct fused to the image it points to
530 GlyphInfo *glyphInfo = (GlyphInfo *)malloc(sizeof(GlyphInfo) +
531 height * width * pixelSize);
532 #endif
533
534 glyphInfo->advanceX = advance.width;
535 glyphInfo->advanceY = advance.height;
536 glyphInfo->topLeftX = round(bbox.origin.x);
537 glyphInfo->topLeftY = round(bbox.origin.y);
538 glyphInfo->width = width;
539 glyphInfo->height = height;
540 glyphInfo->rowBytes = width * pixelSize;
541 glyphInfo->cellInfo = NULL;
542
543 #ifdef USE_IMAGE_ALIGNED_MEMORY
544 glyphInfo->image = image;
545 #else
546 glyphInfo->image = ((void *)glyphInfo) + sizeof(GlyphInfo);
547 #endif
548
549 return glyphInfo;
550 }
551
552
553 #pragma mark --- Glyph Striking onto Canvas ---
554
555 /*
556 * Clears the canvas, strikes the glyph with CoreGraphics, and then
557 * copies the struck pixels into the GlyphInfo image.
558 */
559 static inline void
560 CGGI_CreateImageForGlyph
561 (CGGI_GlyphCanvas *canvas, const CGGlyph glyph,
562 GlyphInfo *info, const CGGI_RenderingMode *mode)
563 {
564 // clean the canvas
565 CGGI_ClearCanvas(canvas, info);
566
567 // strike the glyph in the upper right corner
568 CGContextShowGlyphsAtPoint(canvas->context,
569 -info->topLeftX,
570 canvas->image->height + info->topLeftY,
571 &glyph, 1);
572
573 // copy the glyph from the canvas into the info
574 (*mode->glyphDescriptor->copyFxnPtr)(canvas, info);
575 }
576
577 /*
578 * CoreText path...
579 */
580 static inline GlyphInfo *
581 CGGI_CreateImageForUnicode
582 (CGGI_GlyphCanvas *canvas, const AWTStrike *strike,
583 const CGGI_RenderingMode *mode, const UniChar uniChar)
584 {
585 // save the state of the world
586 CGContextSaveGState(canvas->context);
587
588 // get the glyph, measure it using CG
589 CGGlyph glyph;
590 CTFontRef fallback;
591 if (uniChar > 0xFFFF) {
592 UTF16Char charRef[2];
593 CTS_BreakupUnicodeIntoSurrogatePairs(uniChar, charRef);
594 CGGlyph glyphTmp[2];
595 fallback = CTS_CopyCTFallbackFontAndGlyphForUnicode(strike->fAWTFont, (const UTF16Char *)&charRef, (CGGlyph *)&glyphTmp, 2);
596 glyph = glyphTmp[0];
597 } else {
598 UTF16Char charRef;
599 charRef = (UTF16Char) uniChar; // truncate.
600 fallback = CTS_CopyCTFallbackFontAndGlyphForUnicode(strike->fAWTFont, (const UTF16Char *)&charRef, &glyph, 1);
601 }
602
603 CGAffineTransform tx = strike->fTx;
604 JRSFontRenderingStyle style = JRSFontAlignStyleForFractionalMeasurement(strike->fStyle);
605
606 CGRect bbox;
607 JRSFontGetBoundingBoxesForGlyphsAndStyle(fallback, &tx, style, &glyph, 1, &bbox);
608
609 CGSize advance;
610 CTFontGetAdvancesForGlyphs(fallback, kCTFontDefaultOrientation, &glyph, &advance, 1);
611
612 // create the Sun2D GlyphInfo we are going to strike into
613 GlyphInfo *info = CGGI_CreateNewGlyphInfoFrom(advance, bbox, strike, mode);
614
615 // fix the context size, just in case the substituted character is unexpectedly large
616 CGGI_SizeCanvas(canvas, info->width, info->height, mode);
617
618 // align the transform for the real CoreText strike
619 CGContextSetTextMatrix(canvas->context, strike->fAltTx);
620
621 const CGFontRef cgFallback = CTFontCopyGraphicsFont(fallback, NULL);
622 CGContextSetFont(canvas->context, cgFallback);
623 CFRelease(cgFallback);
624
625 // clean the canvas - align, strike, and copy the glyph from the canvas into the info
626 CGGI_CreateImageForGlyph(canvas, glyph, info, mode);
627
628 // restore the state of the world
629 CGContextRestoreGState(canvas->context);
630
631 CFRelease(fallback);
632 #ifdef CGGI_DEBUG
633 DUMP_GLYPHINFO(info);
634 #endif
635
636 #ifdef CGGI_DEBUG_DUMP
637 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image);
638 #if 0
639 PRINT_CGSTATES_INFO(NULL);
640 #endif
641 #endif
642
643 return info;
644 }
645
646
647 #pragma mark --- GlyphInfo Filling and Canvas Managment ---
648
649 /*
650 * Sets all the per-run properties for the canvas, and then iterates through
651 * the character run, and creates images in the GlyphInfo structs.
652 *
653 * Not inlined because it would create two copies in the function below
654 */
655 static void
656 CGGI_FillImagesForGlyphsWithSizedCanvas(CGGI_GlyphCanvas *canvas,
657 const AWTStrike *strike,
658 const CGGI_RenderingMode *mode,
659 jlong glyphInfos[],
660 const UniChar uniChars[],
661 const CGGlyph glyphs[],
662 const CFIndex len)
663 {
664 CGContextSetTextMatrix(canvas->context, strike->fAltTx);
665
666 CGContextSetFont(canvas->context, strike->fAWTFont->fNativeCGFont);
667 JRSFontSetRenderingStyleOnContext(canvas->context, strike->fStyle);
668
669 CFIndex i;
670 for (i = 0; i < len; i++) {
671 GlyphInfo *info = (GlyphInfo *)jlong_to_ptr(glyphInfos[i]);
672 if (info != NULL) {
673 CGGI_CreateImageForGlyph(canvas, glyphs[i], info, mode);
674 } else {
675 info = CGGI_CreateImageForUnicode(canvas, strike, mode, uniChars[i]);
676 glyphInfos[i] = ptr_to_jlong(info);
677 }
678 #ifdef CGGI_DEBUG
679 DUMP_GLYPHINFO(info);
680 #endif
681
682 #ifdef CGGI_DEBUG_DUMP
683 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image);
684 #endif
685 }
686 #ifdef CGGI_DEBUG_DUMP
687 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image);
688 PRINT_CGSTATES_INFO(canvas->context);
689 #endif
690 }
691
692 static NSString *threadLocalAACanvasKey =
693 @"Java CoreGraphics Text Renderer Cached Canvas for AA";
694
695 static NSString *threadLocalLCDCanvasKey =
696 @"Java CoreGraphics Text Renderer Cached Canvas for LCD";
697
698 /*
699 * This is the maximum length and height times the above slack squared
700 * to determine if we go with the global canvas, or malloc one on the spot.
701 */
702 #define CGGI_GLYPH_CANVAS_MAX 100
703
704 /*
705 * Based on the space needed to strike the largest character in the run,
706 * either use the global shared canvas, or make one up on the spot, strike
707 * the glyphs, and destroy it.
708 */
709 static inline void
710 CGGI_FillImagesForGlyphs(jlong *glyphInfos, const AWTStrike *strike,
711 const CGGI_RenderingMode *mode,
712 const UniChar uniChars[], const CGGlyph glyphs[],
713 const size_t maxWidth, const size_t maxHeight,
714 const CFIndex len)
715 {
716 if (maxWidth*maxHeight*CGGI_GLYPH_CANVAS_SLACK*CGGI_GLYPH_CANVAS_SLACK >
717 CGGI_GLYPH_CANVAS_MAX*CGGI_GLYPH_CANVAS_MAX*CGGI_GLYPH_CANVAS_SLACK*CGGI_GLYPH_CANVAS_SLACK)
718 {
719 CGGI_GlyphCanvas *tmpCanvas = [[CGGI_GlyphCanvas alloc] init];
720 CGGI_InitCanvas(tmpCanvas, maxWidth, maxHeight, mode);
721 CGGI_FillImagesForGlyphsWithSizedCanvas(tmpCanvas, strike,
722 mode, glyphInfos, uniChars,
723 glyphs, len);
724 CGGI_FreeCanvas(tmpCanvas);
725
726 [tmpCanvas release];
727 return;
728 }
729 NSMutableDictionary *threadDict =
730 [[NSThread currentThread] threadDictionary];
731
732 NSString* theKey = (mode->glyphDescriptor == &rgb) ?
733 threadLocalLCDCanvasKey : threadLocalAACanvasKey;
734
735 CGGI_GlyphCanvas *canvas = [threadDict objectForKey:theKey];
736 if (canvas == nil) {
737 canvas = [[CGGI_GlyphCanvas alloc] init];
738 [threadDict setObject:canvas forKey:theKey];
739 }
740
741 CGGI_SizeCanvas(canvas, maxWidth, maxHeight, mode);
742 CGGI_FillImagesForGlyphsWithSizedCanvas(canvas, strike, mode,
743 glyphInfos, uniChars, glyphs, len);
744 }
745
746 /*
747 * Finds the advances and bounding boxes of the characters in the run,
748 * cycles through all the bounds and calculates the maximum canvas space
749 * required by the largest glyph.
750 *
751 * Creates a GlyphInfo struct with a malloc that also encapsulates the
752 * image the struct points to. This is done to meet memory layout
753 * expectations in the Sun text rasterizer memory managment code.
754 * The image immediately follows the struct physically in memory.
755 */
756 static inline void
757 CGGI_CreateGlyphInfos(jlong *glyphInfos, const AWTStrike *strike,
758 const CGGI_RenderingMode *mode,
759 const UniChar uniChars[], const CGGlyph glyphs[],
760 CGSize advances[], CGRect bboxes[], const CFIndex len)
761 {
762 AWTFont *font = strike->fAWTFont;
763 CGAffineTransform tx = strike->fTx;
764 JRSFontRenderingStyle bboxCGMode = JRSFontAlignStyleForFractionalMeasurement(strike->fStyle);
765
766 JRSFontGetBoundingBoxesForGlyphsAndStyle((CTFontRef)font->fFont, &tx, bboxCGMode, glyphs, len, bboxes);
767 CTFontGetAdvancesForGlyphs((CTFontRef)font->fFont, kCTFontDefaultOrientation, glyphs, advances, len);
768
769 size_t maxWidth = 1;
770 size_t maxHeight = 1;
771
772 CFIndex i;
773 for (i = 0; i < len; i++)
774 {
775 if (uniChars[i] != 0)
776 {
777 glyphInfos[i] = 0L;
778 continue; // will be handled later
779 }
780
781 CGSize advance = advances[i];
782 CGRect bbox = bboxes[i];
783
784 GlyphInfo *glyphInfo = CGGI_CreateNewGlyphInfoFrom(advance, bbox, strike, mode);
785
786 if (maxWidth < glyphInfo->width) maxWidth = glyphInfo->width;
787 if (maxHeight < glyphInfo->height) maxHeight = glyphInfo->height;
788
789 glyphInfos[i] = ptr_to_jlong(glyphInfo);
790 }
791
792 CGGI_FillImagesForGlyphs(glyphInfos, strike, mode, uniChars,
793 glyphs, maxWidth, maxHeight, len);
794 }
795
796
797 #pragma mark --- Temporary Buffer Allocations and Initialization ---
798
799 /*
800 * This stage separates the already valid glyph codes from the unicode values
801 * that need special handling - the rawGlyphCodes array is no longer used
802 * after this stage.
803 */
804 static void
805 CGGI_CreateGlyphsAndScanForComplexities(jlong *glyphInfos,
806 const AWTStrike *strike,
807 const CGGI_RenderingMode *mode,
808 jint rawGlyphCodes[],
809 UniChar uniChars[], CGGlyph glyphs[],
810 CGSize advances[], CGRect bboxes[],
811 const CFIndex len)
812 {
813 CFIndex i;
814 for (i = 0; i < len; i++) {
815 jint code = rawGlyphCodes[i];
816 if (code < 0) {
817 glyphs[i] = 0;
818 uniChars[i] = -code;
819 } else {
820 glyphs[i] = code;
821 uniChars[i] = 0;
822 }
823 }
824
825 CGGI_CreateGlyphInfos(glyphInfos, strike, mode,
826 uniChars, glyphs, advances, bboxes, len);
827
828 #ifdef CGGI_DEBUG_HIT_COUNT
829 static size_t hitCount = 0;
830 hitCount++;
831 printf("%d\n", (int)hitCount);
832 #endif
833 }
834
835 /*
836 * Conditionally stack allocates buffers for glyphs, bounding boxes,
837 * and advances. Unfortunately to use CG or CT in bulk runs (which is
838 * faster than calling them per character), we have to copy into and out
839 * of these buffers. Still a net win though.
840 */
841 void
842 CGGlyphImages_GetGlyphImagePtrs(jlong glyphInfos[],
843 const AWTStrike *strike,
844 jint rawGlyphCodes[], const CFIndex len)
845 {
846 const CGGI_RenderingMode mode = CGGI_GetRenderingMode(strike);
847
848 if (len < MAX_STACK_ALLOC_GLYPH_BUFFER_SIZE) {
849 CGRect bboxes[len];
850 CGSize advances[len];
851 CGGlyph glyphs[len];
852 UniChar uniChars[len];
853
854 CGGI_CreateGlyphsAndScanForComplexities(glyphInfos, strike, &mode,
855 rawGlyphCodes, uniChars, glyphs,
856 advances, bboxes, len);
857
858 return;
859 }
860
861 // just do one malloc, and carve it up for all the buffers
862 void *buffer = malloc(sizeof(CGRect) * sizeof(CGSize) *
863 sizeof(CGGlyph) * sizeof(UniChar) * len);
864 if (buffer == NULL) {
865 [[NSException exceptionWithName:NSMallocException
866 reason:@"Failed to allocate memory for the temporary glyph strike and measurement buffers." userInfo:nil] raise];
867 }
868
869 CGRect *bboxes = (CGRect *)(buffer);
870 CGSize *advances = (CGSize *)(bboxes + sizeof(CGRect) * len);
871 CGGlyph *glyphs = (CGGlyph *)(advances + sizeof(CGGlyph) * len);
872 UniChar *uniChars = (UniChar *)(glyphs + sizeof(UniChar) * len);
873
874 CGGI_CreateGlyphsAndScanForComplexities(glyphInfos, strike, &mode,
875 rawGlyphCodes, uniChars, glyphs,
876 advances, bboxes, len);
877
878 free(buffer);
879 }