fpdfsdk/src/fpdf_progressive.cpp

// Copyright 2014 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 "../../public/fpdf_progressive.h"
#include "../../public/fpdfview.h"
#include "../include/fsdk_define.h"
#include "../include/fsdk_rendercontext.h"

DLLEXPORT int STDCALL FPDF_RenderPageBitmap_Start( FPDF_BITMAP bitmap, FPDF_PAGE page,
                                                    int start_x, int start_y, int size_x,
                                                    int size_y, int rotate, int flags,
                                                    IFSDK_PAUSE * pause )
{
    if (bitmap == NULL || page == NULL)
        return FPDF_RENDER_FAILED;

    if (!pause)
        return FPDF_RENDER_FAILED;

    if (pause->version !=1)
        return FPDF_RENDER_FAILED;

    CPDF_Page* pPage = (CPDF_Page*)page;
    CRenderContext* pContext = new CRenderContext;
    pPage->SetPrivateData((void*)1, pContext, DropContext);
#ifdef _SKIA_SUPPORT_
    pContext->m_pDevice = new CFX_SkiaDevice;
    if (flags & FPDF_REVERSE_BYTE_ORDER)
        ((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap,0,TRUE);
    else
        ((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap);
#else
    pContext->m_pDevice = new CFX_FxgeDevice;
    if (flags & FPDF_REVERSE_BYTE_ORDER)
        ((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap,0,TRUE);
    else
        ((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap);
#endif
    IFSDK_PAUSE_Adapter IPauseAdapter(pause);

    FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y,
                           rotate, flags,FALSE, &IPauseAdapter);

    if (pContext->m_pRenderer)
        return CPDF_ProgressiveRenderer::ToFPDFStatus(pContext->m_pRenderer->GetStatus());

    return FPDF_RENDER_FAILED;
}

DLLEXPORT int STDCALL FPDF_RenderPage_Continue(FPDF_PAGE page,IFSDK_PAUSE * pause)
{
    if (page == NULL)
        return FPDF_RENDER_FAILED;

    if (!pause)
        return FPDF_RENDER_FAILED;

    if (pause->version !=1)
        return FPDF_RENDER_FAILED;

    CPDF_Page* pPage = (CPDF_Page*)page;
    CRenderContext * pContext = (CRenderContext*)pPage->GetPrivateData((void*)1);
    if (pContext && pContext->m_pRenderer)
    {
        IFSDK_PAUSE_Adapter IPauseAdapter(pause);
        pContext->m_pRenderer->Continue(&IPauseAdapter);
        return CPDF_ProgressiveRenderer::ToFPDFStatus(pContext->m_pRenderer->GetStatus());
    }
    return FPDF_RENDER_FAILED;
}


DLLEXPORT void STDCALL FPDF_RenderPage_Close(FPDF_PAGE page)
{
    if (!page)
        return;

    CPDF_Page* pPage = (CPDF_Page*)page;
    CRenderContext * pContext = (CRenderContext*)pPage->GetPrivateData((void*)1);
    if (!pContext)
        return;

    pContext->m_pDevice->RestoreState();
    delete pContext;
    pPage->RemovePrivateData((void*)1);
}