1 /* 2 * Copyright (c) 2011, 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 CGGI_RenderingMode *mode) 459 { 460 size_t pixelSize = mode->glyphDescriptor->pixelSize; 461 462 // adjust the bounding box to be 1px bigger on each side than what 463 // CGFont-whatever suggests - because it gives a bounding box that 464 // is too tight 465 bbox.size.width += CGGI_GLYPH_BBOX_PADDING * 2.0f; 466 bbox.size.height += CGGI_GLYPH_BBOX_PADDING * 2.0f; 467 bbox.origin.x -= CGGI_GLYPH_BBOX_PADDING; 468 bbox.origin.y -= CGGI_GLYPH_BBOX_PADDING; 469 470 vImagePixelCount width = ceilf(bbox.size.width); 471 vImagePixelCount height = ceilf(bbox.size.height); 472 473 // if the glyph is larger than 1MB, don't even try... 474 // the GlyphVector path should have taken over by now 475 // and zero pixels is ok 476 if (width * height > 1024 * 1024) { 477 width = 1; 478 height = 1; 479 } 480 481 #ifdef USE_IMAGE_ALIGNED_MEMORY 482 // create separate memory 483 GlyphInfo *glyphInfo = (GlyphInfo *)malloc(sizeof(GlyphInfo)); 484 void *image = (void *)malloc(height * width * pixelSize); 485 #else 486 // create a GlyphInfo struct fused to the image it points to 487 GlyphInfo *glyphInfo = (GlyphInfo *)malloc(sizeof(GlyphInfo) + 488 height * width * pixelSize); 489 #endif 490 491 glyphInfo->advanceX = advance.width; 492 glyphInfo->advanceY = advance.height; 493 glyphInfo->topLeftX = round(bbox.origin.x); 494 glyphInfo->topLeftY = round(bbox.origin.y); 495 glyphInfo->width = width; 496 glyphInfo->height = height; 497 glyphInfo->rowBytes = width * pixelSize; 498 glyphInfo->cellInfo = NULL; 499 500 #ifdef USE_IMAGE_ALIGNED_MEMORY 501 glyphInfo->image = image; 502 #else 503 glyphInfo->image = ((void *)glyphInfo) + sizeof(GlyphInfo); 504 #endif 505 506 return glyphInfo; 507 } 508 509 510 #pragma mark --- Glyph Striking onto Canvas --- 511 512 /* 513 * Clears the canvas, strikes the glyph with CoreGraphics, and then 514 * copies the struck pixels into the GlyphInfo image. 515 */ 516 static inline void 517 CGGI_CreateImageForGlyph 518 (CGGI_GlyphCanvas *canvas, const CGGlyph glyph, 519 GlyphInfo *info, const CGGI_RenderingMode *mode) 520 { 521 // clean the canvas 522 CGGI_ClearCanvas(canvas, info); 523 524 // strike the glyph in the upper right corner 525 CGContextShowGlyphsAtPoint(canvas->context, 526 -info->topLeftX, 527 canvas->image->height + info->topLeftY, 528 &glyph, 1); 529 530 // copy the glyph from the canvas into the info 531 (*mode->glyphDescriptor->copyFxnPtr)(canvas, info); 532 } 533 534 /* 535 * CoreText path... 536 */ 537 static inline GlyphInfo * 538 CGGI_CreateImageForUnicode 539 (CGGI_GlyphCanvas *canvas, const AWTStrike *strike, 540 const CGGI_RenderingMode *mode, const UniChar uniChar) 541 { 542 // save the state of the world 543 CGContextSaveGState(canvas->context); 544 545 // get the glyph, measure it using CG 546 CGGlyph glyph; 547 CTFontRef fallback; 548 if (uniChar > 0xFFFF) { 549 UTF16Char charRef[2]; 550 CTS_BreakupUnicodeIntoSurrogatePairs(uniChar, charRef); 551 CGGlyph glyphTmp[2]; 552 fallback = CTS_CopyCTFallbackFontAndGlyphForUnicode(strike->fAWTFont, (const UTF16Char *)&charRef, (CGGlyph *)&glyphTmp, 2); 553 glyph = glyphTmp[0]; 554 } else { 555 UTF16Char charRef; 556 charRef = (UTF16Char) uniChar; // truncate. 557 fallback = CTS_CopyCTFallbackFontAndGlyphForUnicode(strike->fAWTFont, (const UTF16Char *)&charRef, &glyph, 1); 558 } 559 560 CGAffineTransform tx = strike->fTx; 561 JRSFontRenderingStyle style = JRSFontAlignStyleForFractionalMeasurement(strike->fStyle); 562 563 CGRect bbox; 564 JRSFontGetBoundingBoxesForGlyphsAndStyle(fallback, &tx, style, &glyph, 1, &bbox); 565 566 CGSize advance; 567 JRSFontGetAdvancesForGlyphsAndStyle(fallback, &tx, strike->fStyle, &glyph, 1, &advance); 568 569 // create the Sun2D GlyphInfo we are going to strike into 570 GlyphInfo *info = CGGI_CreateNewGlyphInfoFrom(advance, bbox, mode); 571 572 // fix the context size, just in case the substituted character is unexpectedly large 573 CGGI_SizeCanvas(canvas, info->width, info->height, mode->cgFontMode); 574 575 // align the transform for the real CoreText strike 576 CGContextSetTextMatrix(canvas->context, strike->fAltTx); 577 578 const CGFontRef cgFallback = CTFontCopyGraphicsFont(fallback, NULL); 579 CGContextSetFont(canvas->context, cgFallback); 580 CFRelease(cgFallback); 581 582 // clean the canvas - align, strike, and copy the glyph from the canvas into the info 583 CGGI_CreateImageForGlyph(canvas, glyph, info, mode); 584 585 // restore the state of the world 586 CGContextRestoreGState(canvas->context); 587 588 CFRelease(fallback); 589 #ifdef CGGI_DEBUG 590 DUMP_GLYPHINFO(info); 591 #endif 592 593 #ifdef CGGI_DEBUG_DUMP 594 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image); 595 #if 0 596 PRINT_CGSTATES_INFO(NULL); 597 #endif 598 #endif 599 600 return info; 601 } 602 603 604 #pragma mark --- GlyphInfo Filling and Canvas Managment --- 605 606 /* 607 * Sets all the per-run properties for the canvas, and then iterates through 608 * the character run, and creates images in the GlyphInfo structs. 609 * 610 * Not inlined because it would create two copies in the function below 611 */ 612 static void 613 CGGI_FillImagesForGlyphsWithSizedCanvas(CGGI_GlyphCanvas *canvas, 614 const AWTStrike *strike, 615 const CGGI_RenderingMode *mode, 616 jlong glyphInfos[], 617 const UniChar uniChars[], 618 const CGGlyph glyphs[], 619 const CFIndex len) 620 { 621 CGContextSetTextMatrix(canvas->context, strike->fAltTx); 622 623 CGContextSetFont(canvas->context, strike->fAWTFont->fNativeCGFont); 624 JRSFontSetRenderingStyleOnContext(canvas->context, strike->fStyle); 625 626 CFIndex i; 627 for (i = 0; i < len; i++) { 628 GlyphInfo *info = (GlyphInfo *)jlong_to_ptr(glyphInfos[i]); 629 if (info != NULL) { 630 CGGI_CreateImageForGlyph(canvas, glyphs[i], info, mode); 631 } else { 632 info = CGGI_CreateImageForUnicode(canvas, strike, mode, uniChars[i]); 633 glyphInfos[i] = ptr_to_jlong(info); 634 } 635 #ifdef CGGI_DEBUG 636 DUMP_GLYPHINFO(info); 637 #endif 638 639 #ifdef CGGI_DEBUG_DUMP 640 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image); 641 #endif 642 } 643 #ifdef CGGI_DEBUG_DUMP 644 DUMP_IMG_PIXELS("CGGI Canvas", canvas->image); 645 PRINT_CGSTATES_INFO(canvas->context); 646 #endif 647 } 648 649 static NSString *threadLocalCanvasKey = 650 @"Java CoreGraphics Text Renderer Cached Canvas"; 651 652 /* 653 * This is the maximum length and height times the above slack squared 654 * to determine if we go with the global canvas, or malloc one on the spot. 655 */ 656 #define CGGI_GLYPH_CANVAS_MAX 100 657 658 /* 659 * Based on the space needed to strike the largest character in the run, 660 * either use the global shared canvas, or make one up on the spot, strike 661 * the glyphs, and destroy it. 662 */ 663 static inline void 664 CGGI_FillImagesForGlyphs(jlong *glyphInfos, const AWTStrike *strike, 665 const CGGI_RenderingMode *mode, 666 const UniChar uniChars[], const CGGlyph glyphs[], 667 const size_t maxWidth, const size_t maxHeight, 668 const CFIndex len) 669 { 670 if (maxWidth*maxHeight*CGGI_GLYPH_CANVAS_SLACK*CGGI_GLYPH_CANVAS_SLACK > 671 CGGI_GLYPH_CANVAS_MAX*CGGI_GLYPH_CANVAS_MAX*CGGI_GLYPH_CANVAS_SLACK*CGGI_GLYPH_CANVAS_SLACK) 672 { 673 CGGI_GlyphCanvas *tmpCanvas = [[CGGI_GlyphCanvas alloc] init]; 674 CGGI_InitCanvas(tmpCanvas, maxWidth, maxHeight); 675 CGGI_FillImagesForGlyphsWithSizedCanvas(tmpCanvas, strike, 676 mode, glyphInfos, uniChars, 677 glyphs, len); 678 CGGI_FreeCanvas(tmpCanvas); 679 680 [tmpCanvas release]; 681 return; 682 } 683 684 NSMutableDictionary *threadDict = 685 [[NSThread currentThread] threadDictionary]; 686 CGGI_GlyphCanvas *canvas = [threadDict objectForKey:threadLocalCanvasKey]; 687 if (canvas == nil) { 688 canvas = [[CGGI_GlyphCanvas alloc] init]; 689 [threadDict setObject:canvas forKey:threadLocalCanvasKey]; 690 } 691 692 CGGI_SizeCanvas(canvas, maxWidth, maxHeight, mode->cgFontMode); 693 CGGI_FillImagesForGlyphsWithSizedCanvas(canvas, strike, mode, 694 glyphInfos, uniChars, glyphs, len); 695 } 696 697 /* 698 * Finds the advances and bounding boxes of the characters in the run, 699 * cycles through all the bounds and calculates the maximum canvas space 700 * required by the largest glyph. 701 * 702 * Creates a GlyphInfo struct with a malloc that also encapsulates the 703 * image the struct points to. This is done to meet memory layout 704 * expectations in the Sun text rasterizer memory managment code. 705 * The image immediately follows the struct physically in memory. 706 */ 707 static inline void 708 CGGI_CreateGlyphInfos(jlong *glyphInfos, const AWTStrike *strike, 709 const CGGI_RenderingMode *mode, 710 const UniChar uniChars[], const CGGlyph glyphs[], 711 CGSize advances[], CGRect bboxes[], const CFIndex len) 712 { 713 AWTFont *font = strike->fAWTFont; 714 CGAffineTransform tx = strike->fTx; 715 JRSFontRenderingStyle bboxCGMode = JRSFontAlignStyleForFractionalMeasurement(strike->fStyle); 716 717 JRSFontGetBoundingBoxesForGlyphsAndStyle((CTFontRef)font->fFont, &tx, bboxCGMode, glyphs, len, bboxes); 718 JRSFontGetAdvancesForGlyphsAndStyle((CTFontRef)font->fFont, &tx, strike->fStyle, glyphs, len, advances); 719 720 size_t maxWidth = 1; 721 size_t maxHeight = 1; 722 723 CFIndex i; 724 for (i = 0; i < len; i++) 725 { 726 if (uniChars[i] != 0) 727 { 728 glyphInfos[i] = 0L; 729 continue; // will be handled later 730 } 731 732 CGSize advance = advances[i]; 733 CGRect bbox = bboxes[i]; 734 735 GlyphInfo *glyphInfo = CGGI_CreateNewGlyphInfoFrom(advance, bbox, mode); 736 737 if (maxWidth < glyphInfo->width) maxWidth = glyphInfo->width; 738 if (maxHeight < glyphInfo->height) maxHeight = glyphInfo->height; 739 740 glyphInfos[i] = ptr_to_jlong(glyphInfo); 741 } 742 743 CGGI_FillImagesForGlyphs(glyphInfos, strike, mode, uniChars, 744 glyphs, maxWidth, maxHeight, len); 745 } 746 747 748 #pragma mark --- Temporary Buffer Allocations and Initialization --- 749 750 /* 751 * This stage separates the already valid glyph codes from the unicode values 752 * that need special handling - the rawGlyphCodes array is no longer used 753 * after this stage. 754 */ 755 static void 756 CGGI_CreateGlyphsAndScanForComplexities(jlong *glyphInfos, 757 const AWTStrike *strike, 758 const CGGI_RenderingMode *mode, 759 jint rawGlyphCodes[], 760 UniChar uniChars[], CGGlyph glyphs[], 761 CGSize advances[], CGRect bboxes[], 762 const CFIndex len) 763 { 764 CFIndex i; 765 for (i = 0; i < len; i++) { 766 jint code = rawGlyphCodes[i]; 767 if (code < 0) { 768 glyphs[i] = 0; 769 uniChars[i] = -code; 770 } else { 771 glyphs[i] = code; 772 uniChars[i] = 0; 773 } 774 } 775 776 CGGI_CreateGlyphInfos(glyphInfos, strike, mode, 777 uniChars, glyphs, advances, bboxes, len); 778 779 #ifdef CGGI_DEBUG_HIT_COUNT 780 static size_t hitCount = 0; 781 hitCount++; 782 printf("%d\n", (int)hitCount); 783 #endif 784 } 785 786 /* 787 * Conditionally stack allocates buffers for glyphs, bounding boxes, 788 * and advances. Unfortunately to use CG or CT in bulk runs (which is 789 * faster than calling them per character), we have to copy into and out 790 * of these buffers. Still a net win though. 791 */ 792 void 793 CGGlyphImages_GetGlyphImagePtrs(jlong glyphInfos[], 794 const AWTStrike *strike, 795 jint rawGlyphCodes[], const CFIndex len) 796 { 797 const CGGI_RenderingMode mode = CGGI_GetRenderingMode(strike); 798 799 if (len < MAX_STACK_ALLOC_GLYPH_BUFFER_SIZE) { 800 CGRect bboxes[len]; 801 CGSize advances[len]; 802 CGGlyph glyphs[len]; 803 UniChar uniChars[len]; 804 805 CGGI_CreateGlyphsAndScanForComplexities(glyphInfos, strike, &mode, 806 rawGlyphCodes, uniChars, glyphs, 807 advances, bboxes, len); 808 809 return; 810 } 811 812 // just do one malloc, and carve it up for all the buffers 813 void *buffer = malloc(sizeof(CGRect) * sizeof(CGSize) * 814 sizeof(CGGlyph) * sizeof(UniChar) * len); 815 if (buffer == NULL) { 816 [[NSException exceptionWithName:NSMallocException 817 reason:@"Failed to allocate memory for the temporary glyph strike and measurement buffers." userInfo:nil] raise]; 818 } 819 820 CGRect *bboxes = (CGRect *)(buffer); 821 CGSize *advances = (CGSize *)(bboxes + sizeof(CGRect) * len); 822 CGGlyph *glyphs = (CGGlyph *)(advances + sizeof(CGGlyph) * len); 823 UniChar *uniChars = (UniChar *)(glyphs + sizeof(UniChar) * len); 824 825 CGGI_CreateGlyphsAndScanForComplexities(glyphInfos, strike, &mode, 826 rawGlyphCodes, uniChars, glyphs, 827 advances, bboxes, len); 828 829 free(buffer); 830 }