116 lines
4.6 KiB
C++
116 lines
4.6 KiB
C++
// Copyright 2020 The PDFium Authors
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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 "fpdfsdk/cpdfsdk_renderpage.h"
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#include <memory>
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#include <utility>
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#include "core/fpdfapi/page/cpdf_pageimagecache.h"
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#include "core/fpdfapi/render/cpdf_pagerendercontext.h"
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#include "core/fpdfapi/render/cpdf_progressiverenderer.h"
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#include "core/fpdfapi/render/cpdf_renderoptions.h"
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#include "core/fpdfdoc/cpdf_annotlist.h"
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#include "core/fxge/cfx_renderdevice.h"
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#include "fpdfsdk/cpdfsdk_helpers.h"
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#include "fpdfsdk/cpdfsdk_pauseadapter.h"
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namespace {
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void RenderPageImpl(CPDF_PageRenderContext* pContext,
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CPDF_Page* pPage,
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const CFX_Matrix& matrix,
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const FX_RECT& clipping_rect,
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int flags,
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const FPDF_COLORSCHEME* color_scheme,
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bool need_to_restore,
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CPDFSDK_PauseAdapter* pause) {
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if (!pContext->m_pOptions)
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pContext->m_pOptions = std::make_unique<CPDF_RenderOptions>();
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auto& options = pContext->m_pOptions->GetOptions();
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options.bClearType = !!(flags & FPDF_LCD_TEXT);
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options.bNoNativeText = !!(flags & FPDF_NO_NATIVETEXT);
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options.bLimitedImageCache = !!(flags & FPDF_RENDER_LIMITEDIMAGECACHE);
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options.bForceHalftone = !!(flags & FPDF_RENDER_FORCEHALFTONE);
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options.bNoTextSmooth = !!(flags & FPDF_RENDER_NO_SMOOTHTEXT);
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options.bNoImageSmooth = !!(flags & FPDF_RENDER_NO_SMOOTHIMAGE);
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options.bNoPathSmooth = !!(flags & FPDF_RENDER_NO_SMOOTHPATH);
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// Grayscale output
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if (flags & FPDF_GRAYSCALE)
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pContext->m_pOptions->SetColorMode(CPDF_RenderOptions::kGray);
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if (color_scheme) {
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pContext->m_pOptions->SetColorMode(CPDF_RenderOptions::kForcedColor);
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SetColorFromScheme(color_scheme, pContext->m_pOptions.get());
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options.bConvertFillToStroke = !!(flags & FPDF_CONVERT_FILL_TO_STROKE);
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}
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const CPDF_OCContext::UsageType usage =
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(flags & FPDF_PRINTING) ? CPDF_OCContext::kPrint : CPDF_OCContext::kView;
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pContext->m_pOptions->SetOCContext(
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pdfium::MakeRetain<CPDF_OCContext>(pPage->GetDocument(), usage));
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pContext->m_pDevice->SaveState();
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pContext->m_pDevice->SetBaseClip(clipping_rect);
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pContext->m_pDevice->SetClip_Rect(clipping_rect);
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pContext->m_pContext = std::make_unique<CPDF_RenderContext>(
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pPage->GetDocument(), pPage->GetMutablePageResources(),
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pPage->GetPageImageCache());
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pContext->m_pContext->AppendLayer(pPage, matrix);
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if (flags & FPDF_ANNOT) {
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auto pOwnedList = std::make_unique<CPDF_AnnotList>(pPage);
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CPDF_AnnotList* pList = pOwnedList.get();
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pContext->m_pAnnots = std::move(pOwnedList);
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bool bPrinting =
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pContext->m_pDevice->GetDeviceType() != DeviceType::kDisplay;
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// TODO(https://crbug.com/pdfium/993) - maybe pass true here.
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const bool bShowWidget = false;
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pList->DisplayAnnots(pPage, pContext->m_pDevice.get(),
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pContext->m_pContext.get(), bPrinting, matrix,
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bShowWidget);
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}
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pContext->m_pRenderer = std::make_unique<CPDF_ProgressiveRenderer>(
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pContext->m_pContext.get(), pContext->m_pDevice.get(),
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pContext->m_pOptions.get());
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pContext->m_pRenderer->Start(pause);
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if (need_to_restore)
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pContext->m_pDevice->RestoreState(false);
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}
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} // namespace
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void CPDFSDK_RenderPage(CPDF_PageRenderContext* pContext,
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CPDF_Page* pPage,
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const CFX_Matrix& matrix,
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const FX_RECT& clipping_rect,
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int flags,
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const FPDF_COLORSCHEME* color_scheme) {
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RenderPageImpl(pContext, pPage, matrix, clipping_rect, flags, color_scheme,
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/*need_to_restore=*/true, /*pause=*/nullptr);
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}
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void CPDFSDK_RenderPageWithContext(CPDF_PageRenderContext* pContext,
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CPDF_Page* pPage,
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int start_x,
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int start_y,
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int size_x,
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int size_y,
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int rotate,
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int flags,
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const FPDF_COLORSCHEME* color_scheme,
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bool need_to_restore,
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CPDFSDK_PauseAdapter* pause) {
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const FX_RECT rect(start_x, start_y, start_x + size_x, start_y + size_y);
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RenderPageImpl(pContext, pPage, pPage->GetDisplayMatrix(rect, rotate), rect,
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flags, color_scheme, need_to_restore, pause);
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}
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