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 *(dst + 0) = 0xFF - (p >> 16 & 0xFF); // red 203 *(dst + 1) = 0xFF - (p >> 8 & 0xFF); // green 204 *(dst + 2) = 0xFF - (p & 0xFF); // blue 205 } 206 207 static void 208 CGGI_CopyImageFromCanvasToRGBInfo(CGGI_GlyphCanvas *canvas, GlyphInfo *info) 209 { 210 UInt32 *src = (UInt32 *)canvas->image->data; 211 size_t srcRowWidth = canvas->image->width; 212 213 UInt8 *dest = (UInt8 *)info->image; 214 size_t destRowWidth = info->width; 215 216 size_t height = info->height; 217 218 size_t y; 219 for (y = 0; y < height; y++) { 220 size_t destRow = y * destRowWidth * 3; 221 size_t srcRow = y * srcRowWidth; 222 223 size_t x; 224 for (x = 0; x < destRowWidth; x++) { 225 // size_t x3 = x * 3; 226 // UInt32 p = src[srcRow + x]; 227 // dest[destRow + x3] = 0xFF - (p >> 16 & 0xFF); 228 // dest[destRow + x3 + 1] = 0xFF - (p >> 8 & 0xFF); 229 // dest[destRow + x3 + 2] = 0xFF - (p & 0xFF); 230 CGGI_CopyARGBPixelToRGBPixel(src[srcRow + x], 231 dest + destRow + x * 3); 232 } 233 } 234 } 235 236 //static void CGGI_copyImageFromCanvasToAlphaInfo 237 //(CGGI_GlyphCanvas *canvas, GlyphInfo *info) 238 //{ 239 // vImage_Buffer infoBuffer; 240 // infoBuffer.data = info->image; 241 // infoBuffer.width = info->width; 242 // infoBuffer.height = info->height; 243 // infoBuffer.rowBytes = info->width; // three bytes per RGB pixel 244 // 245 // UInt8 scrapPixel[info->width * info->height]; 246 // vImage_Buffer scrapBuffer; 247 // scrapBuffer.data = &scrapPixel; 248 // scrapBuffer.width = info->width; 249 // scrapBuffer.height = info->height; 250 // scrapBuffer.rowBytes = info->width; 251 // 252 // vImageConvert_ARGB8888toPlanar8(canvas->image, &infoBuffer, 253 // &scrapBuffer, &scrapBuffer, &scrapBuffer, kvImageNoFlags); 254 //} 255 256 static inline UInt8 257 CGGI_ConvertPixelToGreyBit(UInt32 p) 258 { 259 #ifdef __LITTLE_ENDIAN__ 260 return 0xFF - ((p >> 24 & 0xFF) + (p >> 16 & 0xFF) + (p >> 8 & 0xFF)) / 3; 261 #else 262 return 0xFF - ((p >> 16 & 0xFF) + (p >> 8 & 0xFF) + (p & 0xFF)) / 3; 263 #endif 264 } 265 266 static void 267 CGGI_CopyImageFromCanvasToAlphaInfo(CGGI_GlyphCanvas *canvas, GlyphInfo *info) 268 { 269 UInt32 *src = (UInt32 *)canvas->image->data; 270 size_t srcRowWidth = canvas->image->width; 271 272 UInt8 *dest = (UInt8 *)info->image; 273 size_t destRowWidth = info->width; 274 275 size_t height = info->height; 276 277 size_t y; 278 for (y = 0; y < height; y++) { 279 size_t destRow = y * destRowWidth; 280 size_t srcRow = y * srcRowWidth; 281 282 size_t x; 283 for (x = 0; x < destRowWidth; x++) { 284 UInt32 p = src[srcRow + x]; 285 dest[destRow + x] = CGGI_ConvertPixelToGreyBit(p); 286 } 287 } 288 } 289 290 291 #pragma mark --- Pixel Size, Modes, and Canvas Shaping Helper Functions --- 292 293 typedef struct CGGI_GlyphInfoDescriptor { 294 size_t pixelSize; 295 void (*copyFxnPtr)(CGGI_GlyphCanvas *canvas, GlyphInfo *info); 296 } CGGI_GlyphInfoDescriptor; 297 298 typedef struct CGGI_RenderingMode { 299 CGGI_GlyphInfoDescriptor *glyphDescriptor; 300 JRSFontRenderingStyle cgFontMode; 301 } CGGI_RenderingMode; 302 303 static CGGI_GlyphInfoDescriptor grey = 304 { 1, &CGGI_CopyImageFromCanvasToAlphaInfo }; 305 static CGGI_GlyphInfoDescriptor rgb = 306 { 3, &CGGI_CopyImageFromCanvasToRGBInfo }; 307 308 static inline CGGI_RenderingMode 309 CGGI_GetRenderingMode(const AWTStrike *strike) 310 { 311 CGGI_RenderingMode mode; 312 mode.cgFontMode = strike->fStyle; 313 NSException *e = nil; 314 315 switch (strike->fAAStyle) { 316 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_OFF: 317 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_ON: 318 mode.glyphDescriptor = &grey; 319 break; 320 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_HRGB: 321 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_HBGR: 322 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_VRGB: 323 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_LCD_VBGR: 324 mode.glyphDescriptor = &rgb; 325 break; 326 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_GASP: 327 case sun_awt_SunHints_INTVAL_TEXT_ANTIALIAS_DEFAULT: 328 default: 329 e = [NSException 330 exceptionWithName:@"IllegalArgumentException" 331 reason:@"Invalid hint value" 332 userInfo:nil]; 333 @throw e; 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 const CGGI_RenderingMode* mode) 350 { 351 // our canvas is *always* 4-byte ARGB 352 size_t bytesPerRow = width * sizeof(UInt32); 353 size_t byteCount = bytesPerRow * height; 354 355 canvas->image = malloc(sizeof(vImage_Buffer)); 356 canvas->image->width = width; 357 canvas->image->height = height; 358 canvas->image->rowBytes = bytesPerRow; 359 360 canvas->image->data = (void *)calloc(byteCount, sizeof(UInt32)); 361 if (canvas->image->data == NULL) { 362 [[NSException exceptionWithName:NSMallocException 363 reason:@"Failed to allocate memory for the buffer which backs the CGContext for glyph strikes." userInfo:nil] raise]; 364 } 365 366 uint32_t bmpInfo = kCGImageAlphaPremultipliedFirst; 367 if (mode->glyphDescriptor == &rgb) { 368 bmpInfo |= kCGBitmapByteOrder32Host; 369 } 370 371 CGColorSpaceRef colorSpace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB); 372 canvas->context = CGBitmapContextCreate(canvas->image->data, 373 width, height, 8, bytesPerRow, 374 colorSpace, 375 bmpInfo); 376 377 CGContextSetRGBFillColor(canvas->context, 0.0f, 0.0f, 0.0f, 1.0f); 378 CGContextSetFontSize(canvas->context, 1); 379 CGContextSaveGState(canvas->context); 380 381 CGColorSpaceRelease(colorSpace); 382 } 383 384 /* 385 * Releases the BitmapContext and the associated memory backing it. 386 */ 387 static inline void 388 CGGI_FreeCanvas(CGGI_GlyphCanvas *canvas) 389 { 390 if (canvas->context != NULL) { 391 CGContextRelease(canvas->context); 392 } 393 394 if (canvas->image != NULL) { 395 if (canvas->image->data != NULL) { 396 free(canvas->image->data); 397 } 398 free(canvas->image); 399 } 400 } 401 402 /* 403 * This is the slack space that is preallocated for the global GlyphCanvas 404 * when it needs to be expanded. It has been set somewhat liberally to 405 * avoid re-upsizing frequently. 406 */ 407 #define CGGI_GLYPH_CANVAS_SLACK 2.5 408 409 /* 410 * Quick and easy inline to check if this canvas is big enough. 411 */ 412 static inline void 413 CGGI_SizeCanvas(CGGI_GlyphCanvas *canvas, const vImagePixelCount width, const vImagePixelCount height, const CGGI_RenderingMode* mode) 414 { 415 if (canvas->image != NULL && 416 width < canvas->image->width && 417 height < canvas->image->height) 418 { 419 return; 420 } 421 422 // if we don't have enough space to strike the largest glyph in the 423 // run, resize the canvas 424 CGGI_FreeCanvas(canvas); 425 CGGI_InitCanvas(canvas, 426 width * CGGI_GLYPH_CANVAS_SLACK, 427 height * CGGI_GLYPH_CANVAS_SLACK, 428 mode); 429 JRSFontSetRenderingStyleOnContext(canvas->context, mode->cgFontMode); 430 } 431 432 /* 433 * Clear the canvas by blitting white only into the region of interest 434 * (the rect which we will copy out of once the glyph is struck). 435 */ 436 static inline void 437 CGGI_ClearCanvas(CGGI_GlyphCanvas *canvas, GlyphInfo *info) 438 { 439 vImage_Buffer canvasRectToClear; 440 canvasRectToClear.data = canvas->image->data; 441 canvasRectToClear.height = info->height; 442 canvasRectToClear.width = info->width; 443 // use the row stride of the canvas, not the info 444 canvasRectToClear.rowBytes = canvas->image->rowBytes; 445 446 // clean the canvas 447 #ifdef CGGI_DEBUG 448 Pixel_8888 opaqueWhite = { 0xE0, 0xE0, 0xE0, 0xE0 }; 449 #else 450 Pixel_8888 opaqueWhite = { 0xFF, 0xFF, 0xFF, 0xFF }; 451 #endif 452 453 vImageBufferFill_ARGB8888(&canvasRectToClear, opaqueWhite, kvImageNoFlags); 454 } 455 456 457 #pragma mark --- GlyphInfo Creation & Copy Functions --- 458 459 /* 460 * Creates a GlyphInfo with exactly the correct size image and measurements. 461 */ 462 #define CGGI_GLYPH_BBOX_PADDING 2.0f 463 static inline GlyphInfo * 464 CGGI_CreateNewGlyphInfoFrom(CGSize advance, CGRect bbox, 465 const AWTStrike *strike, 466 const CGGI_RenderingMode *mode) 467 { 468 size_t pixelSize = mode->glyphDescriptor->pixelSize; 469 470 // adjust the bounding box to be 1px bigger on each side than what 471 // CGFont-whatever suggests - because it gives a bounding box that 472 // is too tight 473 bbox.size.width += CGGI_GLYPH_BBOX_PADDING * 2.0f; 474 bbox.size.height += CGGI_GLYPH_BBOX_PADDING * 2.0f; 475 bbox.origin.x -= CGGI_GLYPH_BBOX_PADDING; 476 bbox.origin.y -= CGGI_GLYPH_BBOX_PADDING; 477 478 vImagePixelCount width = ceilf(bbox.size.width); 479 vImagePixelCount height = ceilf(bbox.size.height); 480 481 // if the glyph is larger than 1MB, don't even try... 482 // the GlyphVector path should have taken over by now 483 // and zero pixels is ok 484 if (width * height > 1024 * 1024) { 485 width = 1; 486 height = 1; 487 } 488 advance = CGSizeApplyAffineTransform(advance, strike->fFontTx); 489 if (!JRSFontStyleUsesFractionalMetrics(strike->fStyle)) { 490 advance.width = round(advance.width); 491 advance.height = round(advance.height); 492 } 493 advance = CGSizeApplyAffineTransform(advance, strike->fDevTx); 494 495 #ifdef USE_IMAGE_ALIGNED_MEMORY 496 // create separate memory 497 GlyphInfo *glyphInfo = (GlyphInfo *)malloc(sizeof(GlyphInfo)); 498 void *image = (void *)malloc(height * width * pixelSize); 499 #else 500 // create a GlyphInfo struct fused to the image it points to 501 GlyphInfo *glyphInfo = (GlyphInfo *)malloc(sizeof(GlyphInfo) + 502 height * width * pixelSize); 503 #endif 504 505 glyphInfo->advanceX = advance.width; 506 glyphInfo->advanceY = advance.height; 507 glyphInfo->topLeftX = round(bbox.origin.x); 508 glyphInfo->topLeftY = round(bbox.origin.y); 509 glyphInfo->width = width; 510 glyphInfo->height = height; 511 glyphInfo->rowBytes = width * pixelSize; 512 glyphInfo->cellInfo = NULL; 513 514 #ifdef USE_IMAGE_ALIGNED_MEMORY 515 glyphInfo->image = image; 516 #else 517 glyphInfo->image = ((void *)glyphInfo) + sizeof(GlyphInfo); 518 #endif 519 520 return glyphInfo; 521 } 522 523 524 #pragma mark --- Glyph Striking onto Canvas --- 525 526 /* 527 * Clears the canvas, strikes the glyph with CoreGraphics, and then 528 * copies the struck pixels into the GlyphInfo image. 529 */ 530 static inline void 531 CGGI_CreateImageForGlyph 532 (CGGI_GlyphCanvas *canvas, const CGGlyph glyph, 533 GlyphInfo *info, const CGGI_RenderingMode *mode) 534 { 535 // clean the canvas 536 CGGI_ClearCanvas(canvas, info); 537 538 // strike the glyph in the upper right corner 539 CGContextShowGlyphsAtPoint(canvas->context, 540 -info->topLeftX, 541 canvas->image->height + info->topLeftY, 542 &glyph, 1); 543 544 // copy the glyph from the canvas into the info 545 (*mode->glyphDescriptor->copyFxnPtr)(canvas, info); 546 } 547 548 /* 549 * CoreText path... 550 */ 551 static inline GlyphInfo * 552 CGGI_CreateImageForUnicode 553 (CGGI_GlyphCanvas *canvas, const AWTStrike *strike, 554 const CGGI_RenderingMode *mode, const UniChar uniChar) 555 { 556 // save the state of the world 557 CGContextSaveGState(canvas->context); 558 559 // get the glyph, measure it using CG 560 CGGlyph glyph; 561 CTFontRef fallback; 562 if (uniChar > 0xFFFF) { 563 UTF16Char charRef[2]; 564 CTS_BreakupUnicodeIntoSurrogatePairs(uniChar, charRef); 565 CGGlyph glyphTmp[2]; 566 fallback = CTS_CopyCTFallbackFontAndGlyphForUnicode(strike->fAWTFont, (const UTF16Char *)&charRef, (CGGlyph *)&glyphTmp, 2); 567 glyph = glyphTmp[0]; 568 } else { 569 UTF16Char charRef; 570 charRef = (UTF16Char) uniChar; // truncate. 571 fallback = CTS_CopyCTFallbackFontAndGlyphForUnicode(strike->fAWTFont, (const UTF16Char *)&charRef, &glyph, 1); 572 } 573 574 CGAffineTransform tx = strike->fTx; 575 JRSFontRenderingStyle style = JRSFontAlignStyleForFractionalMeasurement(strike->fStyle); 576 577 CGRect bbox; 578 JRSFontGetBoundingBoxesForGlyphsAndStyle(fallback, &tx, style, &glyph, 1, &bbox); 579 580 CGSize advance; 581 CTFontGetAdvancesForGlyphs(fallback, kCTFontDefaultOrientation, &glyph, &advance, 1); 582 583 // create the Sun2D GlyphInfo we are going to strike into 584 GlyphInfo *info = CGGI_CreateNewGlyphInfoFrom(advance, bbox, strike, mode); 585 586 // fix the context size, just in case the substituted character is unexpectedly large 587 CGGI_SizeCanvas(canvas, info->width, info->height, mode); 588 589 // align the transform for the real CoreText strike 590 CGContextSetTextMatrix(canvas->context, strike->fAltTx); 591 592 const CGFontRef cgFallback = CTFontCopyGraphicsFont(fallback, NULL); 593 CGContextSetFont(canvas->context, cgFallback); 594 CFRelease(cgFallback); 595 596 // clean the canvas - align, strike, and copy the glyph from the canvas into the info 597 CGGI_CreateImageForGlyph(canvas, glyph, info, mode); 598 599 // restore the state of the world 600 CGContextRestoreGState(canvas->context); 601 602 CFRelease(fallback); 603 #ifdef CGGI_DEBUG 604 DUMP_GLYPHINFO(info); 605 #endif 606 607 #ifdef CGGI_DEBUG_DUMP 608 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image); 609 #if 0 610 PRINT_CGSTATES_INFO(NULL); 611 #endif 612 #endif 613 614 return info; 615 } 616 617 618 #pragma mark --- GlyphInfo Filling and Canvas Managment --- 619 620 /* 621 * Sets all the per-run properties for the canvas, and then iterates through 622 * the character run, and creates images in the GlyphInfo structs. 623 * 624 * Not inlined because it would create two copies in the function below 625 */ 626 static void 627 CGGI_FillImagesForGlyphsWithSizedCanvas(CGGI_GlyphCanvas *canvas, 628 const AWTStrike *strike, 629 const CGGI_RenderingMode *mode, 630 jlong glyphInfos[], 631 const UniChar uniChars[], 632 const CGGlyph glyphs[], 633 const CFIndex len) 634 { 635 CGContextSetTextMatrix(canvas->context, strike->fAltTx); 636 637 CGContextSetFont(canvas->context, strike->fAWTFont->fNativeCGFont); 638 JRSFontSetRenderingStyleOnContext(canvas->context, strike->fStyle); 639 640 CFIndex i; 641 for (i = 0; i < len; i++) { 642 GlyphInfo *info = (GlyphInfo *)jlong_to_ptr(glyphInfos[i]); 643 if (info != NULL) { 644 CGGI_CreateImageForGlyph(canvas, glyphs[i], info, mode); 645 } else { 646 info = CGGI_CreateImageForUnicode(canvas, strike, mode, uniChars[i]); 647 glyphInfos[i] = ptr_to_jlong(info); 648 } 649 #ifdef CGGI_DEBUG 650 DUMP_GLYPHINFO(info); 651 #endif 652 653 #ifdef CGGI_DEBUG_DUMP 654 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image); 655 #endif 656 } 657 #ifdef CGGI_DEBUG_DUMP 658 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image); 659 PRINT_CGSTATES_INFO(canvas->context); 660 #endif 661 } 662 663 static NSString *threadLocalAACanvasKey = 664 @"Java CoreGraphics Text Renderer Cached Canvas for AA"; 665 666 static NSString *threadLocalLCDCanvasKey = 667 @"Java CoreGraphics Text Renderer Cached Canvas for LCD"; 668 669 /* 670 * This is the maximum length and height times the above slack squared 671 * to determine if we go with the global canvas, or malloc one on the spot. 672 */ 673 #define CGGI_GLYPH_CANVAS_MAX 100 674 675 /* 676 * Based on the space needed to strike the largest character in the run, 677 * either use the global shared canvas, or make one up on the spot, strike 678 * the glyphs, and destroy it. 679 */ 680 static inline void 681 CGGI_FillImagesForGlyphs(jlong *glyphInfos, const AWTStrike *strike, 682 const CGGI_RenderingMode *mode, 683 const UniChar uniChars[], const CGGlyph glyphs[], 684 const size_t maxWidth, const size_t maxHeight, 685 const CFIndex len) 686 { 687 if (maxWidth*maxHeight*CGGI_GLYPH_CANVAS_SLACK*CGGI_GLYPH_CANVAS_SLACK > 688 CGGI_GLYPH_CANVAS_MAX*CGGI_GLYPH_CANVAS_MAX*CGGI_GLYPH_CANVAS_SLACK*CGGI_GLYPH_CANVAS_SLACK) 689 { 690 CGGI_GlyphCanvas *tmpCanvas = [[CGGI_GlyphCanvas alloc] init]; 691 CGGI_InitCanvas(tmpCanvas, maxWidth, maxHeight, mode); 692 CGGI_FillImagesForGlyphsWithSizedCanvas(tmpCanvas, strike, 693 mode, glyphInfos, uniChars, 694 glyphs, len); 695 CGGI_FreeCanvas(tmpCanvas); 696 697 [tmpCanvas release]; 698 return; 699 } 700 701 NSMutableDictionary *threadDict = 702 [[NSThread currentThread] threadDictionary]; 703 704 NSString* theKey; 705 706 if (mode->glyphDescriptor == &rgb) { 707 theKey = threadLocalLCDCanvasKey; 708 } else { 709 theKey = threadLocalAACanvasKey; 710 } 711 712 CGGI_GlyphCanvas *canvas = [threadDict objectForKey:theKey]; 713 if (canvas == nil) { 714 canvas = [[CGGI_GlyphCanvas alloc] init]; 715 [threadDict setObject:canvas forKey:theKey]; 716 } 717 718 CGGI_SizeCanvas(canvas, maxWidth, maxHeight, mode); 719 CGGI_FillImagesForGlyphsWithSizedCanvas(canvas, strike, mode, 720 glyphInfos, uniChars, glyphs, len); 721 } 722 723 /* 724 * Finds the advances and bounding boxes of the characters in the run, 725 * cycles through all the bounds and calculates the maximum canvas space 726 * required by the largest glyph. 727 * 728 * Creates a GlyphInfo struct with a malloc that also encapsulates the 729 * image the struct points to. This is done to meet memory layout 730 * expectations in the Sun text rasterizer memory managment code. 731 * The image immediately follows the struct physically in memory. 732 */ 733 static inline void 734 CGGI_CreateGlyphInfos(jlong *glyphInfos, const AWTStrike *strike, 735 const CGGI_RenderingMode *mode, 736 const UniChar uniChars[], const CGGlyph glyphs[], 737 CGSize advances[], CGRect bboxes[], const CFIndex len) 738 { 739 AWTFont *font = strike->fAWTFont; 740 CGAffineTransform tx = strike->fTx; 741 JRSFontRenderingStyle bboxCGMode = JRSFontAlignStyleForFractionalMeasurement(strike->fStyle); 742 743 JRSFontGetBoundingBoxesForGlyphsAndStyle((CTFontRef)font->fFont, &tx, bboxCGMode, glyphs, len, bboxes); 744 CTFontGetAdvancesForGlyphs((CTFontRef)font->fFont, kCTFontDefaultOrientation, glyphs, advances, len); 745 746 size_t maxWidth = 1; 747 size_t maxHeight = 1; 748 749 CFIndex i; 750 for (i = 0; i < len; i++) 751 { 752 if (uniChars[i] != 0) 753 { 754 glyphInfos[i] = 0L; 755 continue; // will be handled later 756 } 757 758 CGSize advance = advances[i]; 759 CGRect bbox = bboxes[i]; 760 761 GlyphInfo *glyphInfo = CGGI_CreateNewGlyphInfoFrom(advance, bbox, strike, mode); 762 763 if (maxWidth < glyphInfo->width) maxWidth = glyphInfo->width; 764 if (maxHeight < glyphInfo->height) maxHeight = glyphInfo->height; 765 766 glyphInfos[i] = ptr_to_jlong(glyphInfo); 767 } 768 769 CGGI_FillImagesForGlyphs(glyphInfos, strike, mode, uniChars, 770 glyphs, maxWidth, maxHeight, len); 771 } 772 773 774 #pragma mark --- Temporary Buffer Allocations and Initialization --- 775 776 /* 777 * This stage separates the already valid glyph codes from the unicode values 778 * that need special handling - the rawGlyphCodes array is no longer used 779 * after this stage. 780 */ 781 static void 782 CGGI_CreateGlyphsAndScanForComplexities(jlong *glyphInfos, 783 const AWTStrike *strike, 784 const CGGI_RenderingMode *mode, 785 jint rawGlyphCodes[], 786 UniChar uniChars[], CGGlyph glyphs[], 787 CGSize advances[], CGRect bboxes[], 788 const CFIndex len) 789 { 790 CFIndex i; 791 for (i = 0; i < len; i++) { 792 jint code = rawGlyphCodes[i]; 793 if (code < 0) { 794 glyphs[i] = 0; 795 uniChars[i] = -code; 796 } else { 797 glyphs[i] = code; 798 uniChars[i] = 0; 799 } 800 } 801 802 CGGI_CreateGlyphInfos(glyphInfos, strike, mode, 803 uniChars, glyphs, advances, bboxes, len); 804 805 #ifdef CGGI_DEBUG_HIT_COUNT 806 static size_t hitCount = 0; 807 hitCount++; 808 printf("%d\n", (int)hitCount); 809 #endif 810 } 811 812 /* 813 * Conditionally stack allocates buffers for glyphs, bounding boxes, 814 * and advances. Unfortunately to use CG or CT in bulk runs (which is 815 * faster than calling them per character), we have to copy into and out 816 * of these buffers. Still a net win though. 817 */ 818 void 819 CGGlyphImages_GetGlyphImagePtrs(jlong glyphInfos[], 820 const AWTStrike *strike, 821 jint rawGlyphCodes[], const CFIndex len) 822 { 823 const CGGI_RenderingMode mode = CGGI_GetRenderingMode(strike); 824 825 if (len < MAX_STACK_ALLOC_GLYPH_BUFFER_SIZE) { 826 CGRect bboxes[len]; 827 CGSize advances[len]; 828 CGGlyph glyphs[len]; 829 UniChar uniChars[len]; 830 831 CGGI_CreateGlyphsAndScanForComplexities(glyphInfos, strike, &mode, 832 rawGlyphCodes, uniChars, glyphs, 833 advances, bboxes, len); 834 835 return; 836 } 837 838 // just do one malloc, and carve it up for all the buffers 839 void *buffer = malloc(sizeof(CGRect) * sizeof(CGSize) * 840 sizeof(CGGlyph) * sizeof(UniChar) * len); 841 if (buffer == NULL) { 842 [[NSException exceptionWithName:NSMallocException 843 reason:@"Failed to allocate memory for the temporary glyph strike and measurement buffers." userInfo:nil] raise]; 844 } 845 846 CGRect *bboxes = (CGRect *)(buffer); 847 CGSize *advances = (CGSize *)(bboxes + sizeof(CGRect) * len); 848 CGGlyph *glyphs = (CGGlyph *)(advances + sizeof(CGGlyph) * len); 849 UniChar *uniChars = (UniChar *)(glyphs + sizeof(UniChar) * len); 850 851 CGGI_CreateGlyphsAndScanForComplexities(glyphInfos, strike, &mode, 852 rawGlyphCodes, uniChars, glyphs, 853 advances, bboxes, len); 854 855 free(buffer); 856 }