diff options
Diffstat (limited to 'core/fpdfapi/render/cpdf_textrenderer.cpp')
| -rw-r--r-- | core/fpdfapi/render/cpdf_textrenderer.cpp | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/core/fpdfapi/render/cpdf_textrenderer.cpp b/core/fpdfapi/render/cpdf_textrenderer.cpp new file mode 100644 index 0000000000..9cb8ce933e --- /dev/null +++ b/core/fpdfapi/render/cpdf_textrenderer.cpp @@ -0,0 +1,187 @@ +// 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 <vector> + +#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" + +// static +bool CPDF_TextRenderer::DrawTextPath(CFX_RenderDevice* pDevice, + int nChars, + uint32_t* pCharCodes, + FX_FLOAT* pCharPos, + CPDF_Font* pFont, + FX_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(nChars, pCharCodes, pCharPos, 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; + auto* font = fontPosition == -1 + ? &pFont->m_Font + : pFont->m_FontFallbacks[fontPosition].get(); + 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; + } + auto* font = fontPosition == -1 ? &pFont->m_Font + : pFont->m_FontFallbacks[fontPosition].get(); + 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, + FX_FLOAT origin_x, + FX_FLOAT origin_y, + CPDF_Font* pFont, + FX_FLOAT font_size, + const CFX_Matrix* pMatrix, + const CFX_ByteString& str, + FX_ARGB fill_argb, + FX_ARGB stroke_argb, + const CFX_GraphStateData* pGraphState, + const CPDF_RenderOptions* pOptions) { + if (pFont->IsType3Font()) + return; + + int nChars = pFont->CountChar(str.c_str(), str.GetLength()); + if (nChars <= 0) + return; + + int offset = 0; + uint32_t* pCharCodes; + FX_FLOAT* pCharPos; + std::vector<uint32_t> codes; + std::vector<FX_FLOAT> positions; + if (nChars == 1) { + pCharCodes = reinterpret_cast<uint32_t*>( + pFont->GetNextChar(str.c_str(), str.GetLength(), offset)); + pCharPos = nullptr; + } else { + codes.resize(nChars); + positions.resize(nChars - 1); + FX_FLOAT cur_pos = 0; + for (int i = 0; i < nChars; i++) { + codes[i] = pFont->GetNextChar(str.c_str(), str.GetLength(), offset); + if (i) + positions[i - 1] = cur_pos; + cur_pos += pFont->GetCharWidthF(codes[i]) * font_size / 1000; + } + pCharCodes = codes.data(); + pCharPos = positions.data(); + } + CFX_Matrix matrix; + if (pMatrix) + matrix = *pMatrix; + + matrix.e = origin_x; + matrix.f = origin_y; + + if (stroke_argb == 0) { + DrawNormalText(pDevice, nChars, pCharCodes, pCharPos, pFont, font_size, + &matrix, fill_argb, pOptions); + } else { + DrawTextPath(pDevice, nChars, pCharCodes, pCharPos, pFont, font_size, + &matrix, nullptr, pGraphState, fill_argb, stroke_argb, nullptr, + 0); + } +} + +// static +bool CPDF_TextRenderer::DrawNormalText(CFX_RenderDevice* pDevice, + int nChars, + uint32_t* pCharCodes, + FX_FLOAT* pCharPos, + CPDF_Font* pFont, + FX_FLOAT font_size, + const CFX_Matrix* pText2Device, + FX_ARGB fill_argb, + const CPDF_RenderOptions* pOptions) { + CPDF_CharPosList CharPosList; + CharPosList.Load(nChars, pCharCodes, pCharPos, pFont, font_size); + if (CharPosList.m_nChars == 0) + return true; + int FXGE_flags = 0; + if (pOptions) { + uint32_t dwFlags = pOptions->m_Flags; + if (dwFlags & RENDER_CLEARTYPE) { + FXGE_flags |= FXTEXT_CLEARTYPE; + if (dwFlags & RENDER_BGR_STRIPE) + FXGE_flags |= FXTEXT_BGR_STRIPE; + } + if (dwFlags & RENDER_NOTEXTSMOOTH) + FXGE_flags |= FXTEXT_NOSMOOTH; + if (dwFlags & RENDER_PRINTGRAPHICTEXT) + FXGE_flags |= FXTEXT_PRINTGRAPHICTEXT; + if (dwFlags & RENDER_NO_NATIVETEXT) + FXGE_flags |= FXTEXT_NO_NATIVETEXT; + if (dwFlags & RENDER_PRINTIMAGETEXT) + 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; + auto* font = fontPosition == -1 + ? &pFont->m_Font + : pFont->m_FontFallbacks[fontPosition].get(); + if (!pDevice->DrawNormalText( + i - startIndex, CharPosList.m_pCharPos + startIndex, font, + font_size, pText2Device, fill_argb, FXGE_flags)) { + bDraw = false; + } + fontPosition = curFontPosition; + startIndex = i; + } + auto* font = fontPosition == -1 ? &pFont->m_Font + : pFont->m_FontFallbacks[fontPosition].get(); + if (!pDevice->DrawNormalText(CharPosList.m_nChars - startIndex, + CharPosList.m_pCharPos + startIndex, font, + font_size, pText2Device, fill_argb, + FXGE_flags)) { + bDraw = false; + } + return bDraw; +} |