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