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// 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
#ifndef PUBLIC_FPDF_PROGRESSIVE_H_
#define PUBLIC_FPDF_PROGRESSIVE_H_
// NOLINTNEXTLINE(build/include)
#include "fpdfview.h"
// Flags for progressive process status.
#define FPDF_RENDER_READY 0
#define FPDF_RENDER_TOBECONTINUED 1
#define FPDF_RENDER_DONE 2
#define FPDF_RENDER_FAILED 3
#ifdef __cplusplus
extern "C" {
#endif
// IFPDF_RENDERINFO interface.
typedef struct _IFSDK_PAUSE {
/**
* Version number of the interface. Currently must be 1.
**/
int version;
/*
* Method: NeedToPauseNow
* Check if we need to pause a progressive process now.
* Interface Version:
* 1
* Implementation Required:
* yes
* Parameters:
* pThis - Pointer to the interface structure itself
* Return Value:
* Non-zero for pause now, 0 for continue.
*
*/
FPDF_BOOL (*NeedToPauseNow)(struct _IFSDK_PAUSE* pThis);
// A user defined data pointer, used by user's application. Can be NULL.
void* user;
} IFSDK_PAUSE;
// Function: FPDF_RenderPageBitmap_Start
// Start to render page contents to a device independent bitmap
// progressively.
// Parameters:
// bitmap - Handle to the device independent bitmap (as the
// output buffer).
// Bitmap handle can be created by FPDFBitmap_Create
// function.
// page - Handle to the page. Returned by FPDF_LoadPage
// function.
// start_x - Left pixel position of the display area in the
// bitmap coordinate.
// start_y - Top pixel position of the display area in the bitmap
// coordinate.
// size_x - Horizontal size (in pixels) for displaying the page.
// size_y - Vertical size (in pixels) for displaying the page.
// rotate - Page orientation: 0 (normal), 1 (rotated 90 degrees
// clockwise),
// 2 (rotated 180 degrees), 3 (rotated 90 degrees
// counter-clockwise).
// flags - 0 for normal display, or combination of flags
// defined in fpdfview.h. With FPDF_ANNOT flag, it
// renders all annotations that does not require
// user-interaction, which are all annotations except
// widget and popup annotations.
// pause - The IFSDK_PAUSE interface.A callback mechanism
// allowing the page rendering process
// Return value:
// Rendering Status. See flags for progressive process status for the
// details.
//
FPDF_EXPORT int FPDF_CALLCONV 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);
// Function: FPDF_RenderPage_Continue
// Continue rendering a PDF page.
// Parameters:
// page - Handle to the page. Returned by FPDF_LoadPage
// function.
// pause - The IFSDK_PAUSE interface.A callback mechanism
// allowing the page rendering process
// to be paused before it's finished. This can be NULL
// if you don't want to pause.
// Return value:
// The rendering status. See flags for progressive process status for
// the details.
FPDF_EXPORT int FPDF_CALLCONV FPDF_RenderPage_Continue(FPDF_PAGE page,
IFSDK_PAUSE* pause);
// Function: FPDF_RenderPage_Close
// Release the resource allocate during page rendering. Need to be
// called after finishing rendering or
// cancel the rendering.
// Parameters:
// page - Handle to the page. Returned by FPDF_LoadPage
// function.
// Return value:
// NULL
FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPage_Close(FPDF_PAGE page);
#ifdef __cplusplus
}
#endif
#endif // PUBLIC_FPDF_PROGRESSIVE_H_
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