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1 // Copyright 2014 PDFium Authors. All rights reserved. | 1 // Copyright 2016 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 | 6 |
7 #include "core/fpdfapi/fpdf_page/pageint.h" | 7 #include "core/fpdfapi/fpdf_page/include/cpdf_textobject.h" |
8 | |
9 #include <algorithm> | |
10 | |
11 #include "core/fpdfapi/fpdf_page/include/cpdf_form.h" | |
12 #include "core/fpdfapi/fpdf_page/include/cpdf_page.h" | |
13 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h" | |
14 #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h" | |
15 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h" | |
16 #include "core/fpdfapi/include/cpdf_modulemgr.h" | |
17 #include "core/fpdfapi/ipdf_rendermodule.h" | |
18 #include "third_party/base/stl_util.h" | |
19 | |
20 CPDF_PageObject::CPDF_PageObject() {} | |
21 | |
22 CPDF_PageObject::~CPDF_PageObject() {} | |
23 | |
24 void CPDF_PageObject::CopyData(const CPDF_PageObject* pSrc) { | |
25 CopyStates(*pSrc); | |
26 m_Left = pSrc->m_Left; | |
27 m_Right = pSrc->m_Right; | |
28 m_Top = pSrc->m_Top; | |
29 m_Bottom = pSrc->m_Bottom; | |
30 } | |
31 | |
32 void CPDF_PageObject::TransformClipPath(CFX_Matrix& matrix) { | |
33 if (m_ClipPath.IsNull()) { | |
34 return; | |
35 } | |
36 m_ClipPath.GetModify(); | |
37 m_ClipPath.Transform(matrix); | |
38 } | |
39 | |
40 void CPDF_PageObject::TransformGeneralState(CFX_Matrix& matrix) { | |
41 if (m_GeneralState.IsNull()) { | |
42 return; | |
43 } | |
44 CPDF_GeneralStateData* pGS = m_GeneralState.GetModify(); | |
45 pGS->m_Matrix.Concat(matrix); | |
46 } | |
47 | |
48 FX_RECT CPDF_PageObject::GetBBox(const CFX_Matrix* pMatrix) const { | |
49 CFX_FloatRect rect(m_Left, m_Bottom, m_Right, m_Top); | |
50 if (pMatrix) { | |
51 pMatrix->TransformRect(rect); | |
52 } | |
53 return rect.GetOutterRect(); | |
54 } | |
55 | 8 |
56 CPDF_TextObject::CPDF_TextObject() | 9 CPDF_TextObject::CPDF_TextObject() |
57 : m_PosX(0), | 10 : m_PosX(0), |
58 m_PosY(0), | 11 m_PosY(0), |
59 m_nChars(0), | 12 m_nChars(0), |
60 m_pCharCodes(nullptr), | 13 m_pCharCodes(nullptr), |
61 m_pCharPos(nullptr) {} | 14 m_pCharPos(nullptr) {} |
62 | 15 |
63 CPDF_TextObject::~CPDF_TextObject() { | 16 CPDF_TextObject::~CPDF_TextObject() { |
64 if (m_nChars > 1) { | 17 if (m_nChars > 1) { |
(...skipping 318 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
383 void CPDF_TextObject::SetPosition(FX_FLOAT x, FX_FLOAT y) { | 336 void CPDF_TextObject::SetPosition(FX_FLOAT x, FX_FLOAT y) { |
384 FX_FLOAT dx = x - m_PosX; | 337 FX_FLOAT dx = x - m_PosX; |
385 FX_FLOAT dy = y - m_PosY; | 338 FX_FLOAT dy = y - m_PosY; |
386 m_PosX = x; | 339 m_PosX = x; |
387 m_PosY = y; | 340 m_PosY = y; |
388 m_Left += dx; | 341 m_Left += dx; |
389 m_Right += dx; | 342 m_Right += dx; |
390 m_Top += dy; | 343 m_Top += dy; |
391 m_Bottom += dy; | 344 m_Bottom += dy; |
392 } | 345 } |
393 | |
394 CPDF_ShadingObject::CPDF_ShadingObject() : m_pShading(nullptr) {} | |
395 | |
396 CPDF_ShadingObject::~CPDF_ShadingObject() {} | |
397 | |
398 CPDF_ShadingObject* CPDF_ShadingObject::Clone() const { | |
399 CPDF_ShadingObject* obj = new CPDF_ShadingObject; | |
400 obj->CopyData(this); | |
401 | |
402 obj->m_pShading = m_pShading; | |
403 if (obj->m_pShading && obj->m_pShading->m_pDocument) { | |
404 CPDF_DocPageData* pDocPageData = | |
405 obj->m_pShading->m_pDocument->GetPageData(); | |
406 obj->m_pShading = (CPDF_ShadingPattern*)pDocPageData->GetPattern( | |
407 obj->m_pShading->m_pShadingObj, m_pShading->m_bShadingObj, | |
408 &obj->m_pShading->m_ParentMatrix); | |
409 } | |
410 obj->m_Matrix = m_Matrix; | |
411 return obj; | |
412 } | |
413 | |
414 void CPDF_ShadingObject::Transform(const CFX_Matrix& matrix) { | |
415 if (!m_ClipPath.IsNull()) { | |
416 m_ClipPath.GetModify(); | |
417 m_ClipPath.Transform(matrix); | |
418 } | |
419 m_Matrix.Concat(matrix); | |
420 if (!m_ClipPath.IsNull()) { | |
421 CalcBoundingBox(); | |
422 } else { | |
423 matrix.TransformRect(m_Left, m_Right, m_Top, m_Bottom); | |
424 } | |
425 } | |
426 | |
427 void CPDF_ShadingObject::CalcBoundingBox() { | |
428 if (m_ClipPath.IsNull()) { | |
429 return; | |
430 } | |
431 CFX_FloatRect rect = m_ClipPath.GetClipBox(); | |
432 m_Left = rect.left; | |
433 m_Bottom = rect.bottom; | |
434 m_Right = rect.right; | |
435 m_Top = rect.top; | |
436 } | |
437 | |
438 CPDF_FormObject::CPDF_FormObject() : m_pForm(nullptr) {} | |
439 | |
440 CPDF_FormObject::~CPDF_FormObject() { | |
441 delete m_pForm; | |
442 } | |
443 | |
444 void CPDF_FormObject::Transform(const CFX_Matrix& matrix) { | |
445 m_FormMatrix.Concat(matrix); | |
446 CalcBoundingBox(); | |
447 } | |
448 | |
449 CPDF_FormObject* CPDF_FormObject::Clone() const { | |
450 CPDF_FormObject* obj = new CPDF_FormObject; | |
451 obj->CopyData(this); | |
452 | |
453 obj->m_pForm = m_pForm->Clone(); | |
454 obj->m_FormMatrix = m_FormMatrix; | |
455 return obj; | |
456 } | |
457 | |
458 void CPDF_FormObject::CalcBoundingBox() { | |
459 CFX_FloatRect form_rect = m_pForm->CalcBoundingBox(); | |
460 form_rect.Transform(&m_FormMatrix); | |
461 m_Left = form_rect.left; | |
462 m_Bottom = form_rect.bottom; | |
463 m_Right = form_rect.right; | |
464 m_Top = form_rect.top; | |
465 } | |
466 | |
467 CPDF_Page::CPDF_Page() : m_pPageRender(nullptr) {} | |
468 | |
469 void CPDF_Page::Load(CPDF_Document* pDocument, | |
470 CPDF_Dictionary* pPageDict, | |
471 FX_BOOL bPageCache) { | |
472 m_pDocument = (CPDF_Document*)pDocument; | |
473 m_pFormDict = pPageDict; | |
474 if (bPageCache) { | |
475 m_pPageRender = | |
476 CPDF_ModuleMgr::Get()->GetRenderModule()->CreatePageCache(this); | |
477 } | |
478 if (!pPageDict) { | |
479 m_PageWidth = m_PageHeight = 100 * 1.0f; | |
480 m_pPageResources = m_pResources = NULL; | |
481 return; | |
482 } | |
483 CPDF_Object* pageAttr = GetPageAttr("Resources"); | |
484 m_pResources = pageAttr ? pageAttr->GetDict() : NULL; | |
485 m_pPageResources = m_pResources; | |
486 CPDF_Object* pRotate = GetPageAttr("Rotate"); | |
487 int rotate = 0; | |
488 if (pRotate) { | |
489 rotate = pRotate->GetInteger() / 90 % 4; | |
490 } | |
491 if (rotate < 0) { | |
492 rotate += 4; | |
493 } | |
494 CPDF_Array* pMediaBox = ToArray(GetPageAttr("MediaBox")); | |
495 CFX_FloatRect mediabox; | |
496 if (pMediaBox) { | |
497 mediabox = pMediaBox->GetRect(); | |
498 mediabox.Normalize(); | |
499 } | |
500 if (mediabox.IsEmpty()) { | |
501 mediabox = CFX_FloatRect(0, 0, 612, 792); | |
502 } | |
503 | |
504 CPDF_Array* pCropBox = ToArray(GetPageAttr("CropBox")); | |
505 if (pCropBox) { | |
506 m_BBox = pCropBox->GetRect(); | |
507 m_BBox.Normalize(); | |
508 } | |
509 if (m_BBox.IsEmpty()) { | |
510 m_BBox = mediabox; | |
511 } else { | |
512 m_BBox.Intersect(mediabox); | |
513 } | |
514 if (rotate % 2) { | |
515 m_PageHeight = m_BBox.right - m_BBox.left; | |
516 m_PageWidth = m_BBox.top - m_BBox.bottom; | |
517 } else { | |
518 m_PageWidth = m_BBox.right - m_BBox.left; | |
519 m_PageHeight = m_BBox.top - m_BBox.bottom; | |
520 } | |
521 switch (rotate) { | |
522 case 0: | |
523 m_PageMatrix.Set(1.0f, 0, 0, 1.0f, -m_BBox.left, -m_BBox.bottom); | |
524 break; | |
525 case 1: | |
526 m_PageMatrix.Set(0, -1.0f, 1.0f, 0, -m_BBox.bottom, m_BBox.right); | |
527 break; | |
528 case 2: | |
529 m_PageMatrix.Set(-1.0f, 0, 0, -1.0f, m_BBox.right, m_BBox.top); | |
530 break; | |
531 case 3: | |
532 m_PageMatrix.Set(0, 1.0f, -1.0f, 0, m_BBox.top, -m_BBox.left); | |
533 break; | |
534 } | |
535 m_Transparency = PDFTRANS_ISOLATED; | |
536 LoadTransInfo(); | |
537 } | |
538 | |
539 void CPDF_Page::StartParse(CPDF_ParseOptions* pOptions) { | |
540 if (m_ParseState == CONTENT_PARSED || m_ParseState == CONTENT_PARSING) { | |
541 return; | |
542 } | |
543 m_pParser.reset(new CPDF_ContentParser); | |
544 m_pParser->Start(this, pOptions); | |
545 m_ParseState = CONTENT_PARSING; | |
546 } | |
547 | |
548 void CPDF_Page::ParseContent(CPDF_ParseOptions* pOptions) { | |
549 StartParse(pOptions); | |
550 ContinueParse(nullptr); | |
551 } | |
552 | |
553 CPDF_Page::~CPDF_Page() { | |
554 if (m_pPageRender) { | |
555 IPDF_RenderModule* pModule = CPDF_ModuleMgr::Get()->GetRenderModule(); | |
556 pModule->DestroyPageCache(m_pPageRender); | |
557 } | |
558 } | |
559 | |
560 CPDF_Object* FPDFAPI_GetPageAttr(CPDF_Dictionary* pPageDict, | |
561 const CFX_ByteStringC& name) { | |
562 int level = 0; | |
563 while (1) { | |
564 CPDF_Object* pObj = pPageDict->GetElementValue(name); | |
565 if (pObj) { | |
566 return pObj; | |
567 } | |
568 CPDF_Dictionary* pParent = pPageDict->GetDictBy("Parent"); | |
569 if (!pParent || pParent == pPageDict) { | |
570 return NULL; | |
571 } | |
572 pPageDict = pParent; | |
573 level++; | |
574 if (level == 1000) { | |
575 return NULL; | |
576 } | |
577 } | |
578 } | |
579 | |
580 CPDF_Object* CPDF_Page::GetPageAttr(const CFX_ByteStringC& name) const { | |
581 return FPDFAPI_GetPageAttr(m_pFormDict, name); | |
582 } | |
583 | |
584 void CPDF_Page::GetDisplayMatrix(CFX_Matrix& matrix, | |
585 int xPos, | |
586 int yPos, | |
587 int xSize, | |
588 int ySize, | |
589 int iRotate) const { | |
590 if (m_PageWidth == 0 || m_PageHeight == 0) { | |
591 return; | |
592 } | |
593 CFX_Matrix display_matrix; | |
594 int x0, y0, x1, y1, x2, y2; | |
595 iRotate %= 4; | |
596 switch (iRotate) { | |
597 case 0: | |
598 x0 = xPos; | |
599 y0 = yPos + ySize; | |
600 x1 = xPos; | |
601 y1 = yPos; | |
602 x2 = xPos + xSize; | |
603 y2 = yPos + ySize; | |
604 break; | |
605 case 1: | |
606 x0 = xPos; | |
607 y0 = yPos; | |
608 x1 = xPos + xSize; | |
609 y1 = yPos; | |
610 x2 = xPos; | |
611 y2 = yPos + ySize; | |
612 break; | |
613 case 2: | |
614 x0 = xPos + xSize; | |
615 y0 = yPos; | |
616 x1 = xPos + xSize; | |
617 y1 = yPos + ySize; | |
618 x2 = xPos; | |
619 y2 = yPos; | |
620 break; | |
621 case 3: | |
622 x0 = xPos + xSize; | |
623 y0 = yPos + ySize; | |
624 x1 = xPos; | |
625 y1 = yPos + ySize; | |
626 x2 = xPos + xSize; | |
627 y2 = yPos; | |
628 break; | |
629 } | |
630 display_matrix.Set( | |
631 ((FX_FLOAT)(x2 - x0)) / m_PageWidth, ((FX_FLOAT)(y2 - y0)) / m_PageWidth, | |
632 ((FX_FLOAT)(x1 - x0)) / m_PageHeight, | |
633 ((FX_FLOAT)(y1 - y0)) / m_PageHeight, (FX_FLOAT)x0, (FX_FLOAT)y0); | |
634 matrix = m_PageMatrix; | |
635 matrix.Concat(display_matrix); | |
636 } | |
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