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// 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->HasFlag(RENDER_CLEARTYPE)) {
FXGE_flags |= FXTEXT_CLEARTYPE;
if (pOptions->HasFlag(RENDER_BGR_STRIPE))
FXGE_flags |= FXTEXT_BGR_STRIPE;
}
if (pOptions->HasFlag(RENDER_NOTEXTSMOOTH))
FXGE_flags |= FXTEXT_NOSMOOTH;
if (pOptions->HasFlag(RENDER_PRINTGRAPHICTEXT))
FXGE_flags |= FXTEXT_PRINTGRAPHICTEXT;
if (pOptions->HasFlag(RENDER_NO_NATIVETEXT))
FXGE_flags |= FXTEXT_NO_NATIVETEXT;
if (pOptions->HasFlag(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;
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;
}
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