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