| // Copyright 2016 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include "core/fpdfapi/render/cpdf_textrenderer.h" |
| |
| #include <algorithm> |
| |
| #include "core/fpdfapi/font/cpdf_font.h" |
| #include "core/fpdfapi/render/cpdf_charposlist.h" |
| #include "core/fpdfapi/render/cpdf_renderoptions.h" |
| #include "core/fxge/cfx_graphstatedata.h" |
| #include "core/fxge/cfx_pathdata.h" |
| #include "core/fxge/cfx_renderdevice.h" |
| |
| namespace { |
| |
| CFX_Font* GetFont(CPDF_Font* pFont, int32_t position) { |
| return position == -1 ? pFont->GetFont() : pFont->GetFontFallback(position); |
| } |
| |
| } // namespace |
| |
| // static |
| bool CPDF_TextRenderer::DrawTextPath(CFX_RenderDevice* pDevice, |
| const std::vector<uint32_t>& charCodes, |
| const std::vector<float>& charPos, |
| CPDF_Font* pFont, |
| float font_size, |
| const CFX_Matrix* pText2User, |
| const CFX_Matrix* pUser2Device, |
| const CFX_GraphStateData* pGraphState, |
| FX_ARGB fill_argb, |
| FX_ARGB stroke_argb, |
| CFX_PathData* pClippingPath, |
| int nFlag) { |
| CPDF_CharPosList CharPosList; |
| CharPosList.Load(charCodes, charPos, pFont, font_size); |
| if (CharPosList.m_nChars == 0) |
| return true; |
| |
| bool bDraw = true; |
| int32_t fontPosition = CharPosList.m_pCharPos[0].m_FallbackFontPosition; |
| uint32_t startIndex = 0; |
| for (uint32_t i = 0; i < CharPosList.m_nChars; i++) { |
| int32_t curFontPosition = CharPosList.m_pCharPos[i].m_FallbackFontPosition; |
| if (fontPosition == curFontPosition) |
| continue; |
| |
| CFX_Font* font = GetFont(pFont, fontPosition); |
| if (!pDevice->DrawTextPath(i - startIndex, |
| CharPosList.m_pCharPos + startIndex, font, |
| font_size, pText2User, pUser2Device, pGraphState, |
| fill_argb, stroke_argb, pClippingPath, nFlag)) { |
| bDraw = false; |
| } |
| fontPosition = curFontPosition; |
| startIndex = i; |
| } |
| CFX_Font* font = GetFont(pFont, fontPosition); |
| if (!pDevice->DrawTextPath(CharPosList.m_nChars - startIndex, |
| CharPosList.m_pCharPos + startIndex, font, |
| font_size, pText2User, pUser2Device, pGraphState, |
| fill_argb, stroke_argb, pClippingPath, nFlag)) { |
| bDraw = false; |
| } |
| return bDraw; |
| } |
| |
| // static |
| void CPDF_TextRenderer::DrawTextString(CFX_RenderDevice* pDevice, |
| float origin_x, |
| float origin_y, |
| CPDF_Font* pFont, |
| float font_size, |
| const CFX_Matrix& matrix, |
| const ByteString& str, |
| FX_ARGB fill_argb, |
| const CFX_GraphStateData* pGraphState, |
| const CPDF_RenderOptions* pOptions) { |
| if (pFont->IsType3Font()) |
| return; |
| |
| int nChars = pFont->CountChar(str.AsStringView()); |
| if (nChars <= 0) |
| return; |
| |
| size_t offset = 0; |
| std::vector<uint32_t> codes; |
| std::vector<float> positions; |
| codes.resize(nChars); |
| positions.resize(nChars - 1); |
| float cur_pos = 0; |
| for (int i = 0; i < nChars; i++) { |
| codes[i] = pFont->GetNextChar(str.AsStringView(), &offset); |
| if (i) |
| positions[i - 1] = cur_pos; |
| cur_pos += pFont->GetCharWidthF(codes[i]) * font_size / 1000; |
| } |
| CFX_Matrix new_matrix = matrix; |
| new_matrix.e = origin_x; |
| new_matrix.f = origin_y; |
| DrawNormalText(pDevice, codes, positions, pFont, font_size, &new_matrix, |
| fill_argb, pOptions); |
| } |
| |
| // static |
| bool CPDF_TextRenderer::DrawNormalText(CFX_RenderDevice* pDevice, |
| const std::vector<uint32_t>& charCodes, |
| const std::vector<float>& charPos, |
| CPDF_Font* pFont, |
| float font_size, |
| const CFX_Matrix* pText2Device, |
| FX_ARGB fill_argb, |
| const CPDF_RenderOptions* pOptions) { |
| CPDF_CharPosList CharPosList; |
| CharPosList.Load(charCodes, charPos, pFont, font_size); |
| if (CharPosList.m_nChars == 0) |
| return true; |
| int FXGE_flags = 0; |
| if (pOptions) { |
| if (pOptions->GetOptions().bClearType) { |
| FXGE_flags |= FXTEXT_CLEARTYPE; |
| if (pOptions->GetOptions().bBGRStripe) |
| FXGE_flags |= FXTEXT_BGR_STRIPE; |
| } |
| if (pOptions->GetOptions().bNoTextSmooth) |
| FXGE_flags |= FXTEXT_NOSMOOTH; |
| if (pOptions->GetOptions().bPrintGraphicText) |
| FXGE_flags |= FXTEXT_PRINTGRAPHICTEXT; |
| if (pOptions->GetOptions().bNoNativeText) |
| FXGE_flags |= FXTEXT_NO_NATIVETEXT; |
| if (pOptions->GetOptions().bPrintImageText) |
| FXGE_flags |= FXTEXT_PRINTIMAGETEXT; |
| } else { |
| FXGE_flags = FXTEXT_CLEARTYPE; |
| } |
| if (pFont->IsCIDFont()) |
| FXGE_flags |= FXFONT_CIDFONT; |
| bool bDraw = true; |
| int32_t fontPosition = CharPosList.m_pCharPos[0].m_FallbackFontPosition; |
| uint32_t startIndex = 0; |
| for (uint32_t i = 0; i < CharPosList.m_nChars; i++) { |
| int32_t curFontPosition = CharPosList.m_pCharPos[i].m_FallbackFontPosition; |
| if (fontPosition == curFontPosition) |
| continue; |
| |
| CFX_Font* font = GetFont(pFont, fontPosition); |
| if (!pDevice->DrawNormalText( |
| i - startIndex, CharPosList.m_pCharPos + startIndex, font, |
| font_size, pText2Device, fill_argb, FXGE_flags)) { |
| bDraw = false; |
| } |
| fontPosition = curFontPosition; |
| startIndex = i; |
| } |
| CFX_Font* font = GetFont(pFont, fontPosition); |
| if (!pDevice->DrawNormalText(CharPosList.m_nChars - startIndex, |
| CharPosList.m_pCharPos + startIndex, font, |
| font_size, pText2Device, fill_argb, |
| FXGE_flags)) { |
| bDraw = false; |
| } |
| return bDraw; |
| } |