1// Copyright 2016 PDFium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7#include "core/fpdfapi/render/cpdf_textrenderer.h"
8
9#include <algorithm>
10
11#include "core/fpdfapi/font/cpdf_font.h"
12#include "core/fpdfapi/render/cpdf_charposlist.h"
13#include "core/fpdfapi/render/cpdf_renderoptions.h"
14#include "core/fxge/cfx_graphstatedata.h"
15#include "core/fxge/cfx_pathdata.h"
16#include "core/fxge/cfx_renderdevice.h"
17
18// static
19bool CPDF_TextRenderer::DrawTextPath(CFX_RenderDevice* pDevice,
20                                     const std::vector<uint32_t>& charCodes,
21                                     const std::vector<FX_FLOAT>& charPos,
22                                     CPDF_Font* pFont,
23                                     FX_FLOAT font_size,
24                                     const CFX_Matrix* pText2User,
25                                     const CFX_Matrix* pUser2Device,
26                                     const CFX_GraphStateData* pGraphState,
27                                     FX_ARGB fill_argb,
28                                     FX_ARGB stroke_argb,
29                                     CFX_PathData* pClippingPath,
30                                     int nFlag) {
31  CPDF_CharPosList CharPosList;
32  CharPosList.Load(charCodes, charPos, pFont, font_size);
33  if (CharPosList.m_nChars == 0)
34    return true;
35
36  bool bDraw = true;
37  int32_t fontPosition = CharPosList.m_pCharPos[0].m_FallbackFontPosition;
38  uint32_t startIndex = 0;
39  for (uint32_t i = 0; i < CharPosList.m_nChars; i++) {
40    int32_t curFontPosition = CharPosList.m_pCharPos[i].m_FallbackFontPosition;
41    if (fontPosition == curFontPosition)
42      continue;
43    auto* font = fontPosition == -1
44                     ? &pFont->m_Font
45                     : pFont->m_FontFallbacks[fontPosition].get();
46    if (!pDevice->DrawTextPath(i - startIndex,
47                               CharPosList.m_pCharPos + startIndex, font,
48                               font_size, pText2User, pUser2Device, pGraphState,
49                               fill_argb, stroke_argb, pClippingPath, nFlag)) {
50      bDraw = false;
51    }
52    fontPosition = curFontPosition;
53    startIndex = i;
54  }
55  auto* font = fontPosition == -1 ? &pFont->m_Font
56                                  : pFont->m_FontFallbacks[fontPosition].get();
57  if (!pDevice->DrawTextPath(CharPosList.m_nChars - startIndex,
58                             CharPosList.m_pCharPos + startIndex, font,
59                             font_size, pText2User, pUser2Device, pGraphState,
60                             fill_argb, stroke_argb, pClippingPath, nFlag)) {
61    bDraw = false;
62  }
63  return bDraw;
64}
65
66// static
67void CPDF_TextRenderer::DrawTextString(CFX_RenderDevice* pDevice,
68                                       FX_FLOAT origin_x,
69                                       FX_FLOAT origin_y,
70                                       CPDF_Font* pFont,
71                                       FX_FLOAT font_size,
72                                       const CFX_Matrix* pMatrix,
73                                       const CFX_ByteString& str,
74                                       FX_ARGB fill_argb,
75                                       const CFX_GraphStateData* pGraphState,
76                                       const CPDF_RenderOptions* pOptions) {
77  if (pFont->IsType3Font())
78    return;
79
80  int nChars = pFont->CountChar(str.c_str(), str.GetLength());
81  if (nChars <= 0)
82    return;
83
84  int offset = 0;
85  std::vector<uint32_t> codes;
86  std::vector<FX_FLOAT> positions;
87  codes.resize(nChars);
88  positions.resize(nChars - 1);
89  FX_FLOAT cur_pos = 0;
90  for (int i = 0; i < nChars; i++) {
91    codes[i] = pFont->GetNextChar(str.c_str(), str.GetLength(), offset);
92    if (i)
93      positions[i - 1] = cur_pos;
94    cur_pos += pFont->GetCharWidthF(codes[i]) * font_size / 1000;
95  }
96  CFX_Matrix matrix;
97  if (pMatrix)
98    matrix = *pMatrix;
99
100  matrix.e = origin_x;
101  matrix.f = origin_y;
102
103  DrawNormalText(pDevice, codes, positions, pFont, font_size, &matrix,
104                 fill_argb, pOptions);
105}
106
107// static
108bool CPDF_TextRenderer::DrawNormalText(CFX_RenderDevice* pDevice,
109                                       const std::vector<uint32_t>& charCodes,
110                                       const std::vector<FX_FLOAT>& charPos,
111                                       CPDF_Font* pFont,
112                                       FX_FLOAT font_size,
113                                       const CFX_Matrix* pText2Device,
114                                       FX_ARGB fill_argb,
115                                       const CPDF_RenderOptions* pOptions) {
116  CPDF_CharPosList CharPosList;
117  CharPosList.Load(charCodes, charPos, pFont, font_size);
118  if (CharPosList.m_nChars == 0)
119    return true;
120  int FXGE_flags = 0;
121  if (pOptions) {
122    uint32_t dwFlags = pOptions->m_Flags;
123    if (dwFlags & RENDER_CLEARTYPE) {
124      FXGE_flags |= FXTEXT_CLEARTYPE;
125      if (dwFlags & RENDER_BGR_STRIPE)
126        FXGE_flags |= FXTEXT_BGR_STRIPE;
127    }
128    if (dwFlags & RENDER_NOTEXTSMOOTH)
129      FXGE_flags |= FXTEXT_NOSMOOTH;
130    if (dwFlags & RENDER_PRINTGRAPHICTEXT)
131      FXGE_flags |= FXTEXT_PRINTGRAPHICTEXT;
132    if (dwFlags & RENDER_NO_NATIVETEXT)
133      FXGE_flags |= FXTEXT_NO_NATIVETEXT;
134    if (dwFlags & RENDER_PRINTIMAGETEXT)
135      FXGE_flags |= FXTEXT_PRINTIMAGETEXT;
136  } else {
137    FXGE_flags = FXTEXT_CLEARTYPE;
138  }
139  if (pFont->IsCIDFont())
140    FXGE_flags |= FXFONT_CIDFONT;
141  bool bDraw = true;
142  int32_t fontPosition = CharPosList.m_pCharPos[0].m_FallbackFontPosition;
143  uint32_t startIndex = 0;
144  for (uint32_t i = 0; i < CharPosList.m_nChars; i++) {
145    int32_t curFontPosition = CharPosList.m_pCharPos[i].m_FallbackFontPosition;
146    if (fontPosition == curFontPosition)
147      continue;
148    auto* font = fontPosition == -1
149                     ? &pFont->m_Font
150                     : pFont->m_FontFallbacks[fontPosition].get();
151    if (!pDevice->DrawNormalText(
152            i - startIndex, CharPosList.m_pCharPos + startIndex, font,
153            font_size, pText2Device, fill_argb, FXGE_flags)) {
154      bDraw = false;
155    }
156    fontPosition = curFontPosition;
157    startIndex = i;
158  }
159  auto* font = fontPosition == -1 ? &pFont->m_Font
160                                  : pFont->m_FontFallbacks[fontPosition].get();
161  if (!pDevice->DrawNormalText(CharPosList.m_nChars - startIndex,
162                               CharPosList.m_pCharPos + startIndex, font,
163                               font_size, pText2Device, fill_argb,
164                               FXGE_flags)) {
165    bDraw = false;
166  }
167  return bDraw;
168}
169