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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_imageloader.h"
#include "core/fpdfapi/page/cpdf_image.h"
#include "core/fpdfapi/page/cpdf_imageobject.h"
#include "core/fpdfapi/render/cpdf_pagerendercache.h"
#include "core/fpdfapi/render/cpdf_renderstatus.h"
#include "core/fpdfapi/render/render_int.h"
#include "core/fxcrt/fx_basic.h"
class CPDF_ImageLoaderHandle {
public:
CPDF_ImageLoaderHandle();
~CPDF_ImageLoaderHandle();
bool Start(CPDF_ImageLoader* pImageLoader,
const CPDF_ImageObject* pImage,
CPDF_PageRenderCache* pCache,
bool bStdCS,
uint32_t GroupFamily,
bool bLoadMask,
CPDF_RenderStatus* pRenderStatus,
int32_t nDownsampleWidth,
int32_t nDownsampleHeight);
bool Continue(IFX_Pause* pPause);
private:
void HandleFailure();
CPDF_ImageLoader* m_pImageLoader;
CPDF_PageRenderCache* m_pCache;
CPDF_ImageObject* m_pImage;
int32_t m_nDownsampleWidth;
int32_t m_nDownsampleHeight;
};
CPDF_ImageLoaderHandle::CPDF_ImageLoaderHandle() {
m_pImageLoader = nullptr;
m_pCache = nullptr;
m_pImage = nullptr;
}
CPDF_ImageLoaderHandle::~CPDF_ImageLoaderHandle() {}
bool CPDF_ImageLoaderHandle::Start(CPDF_ImageLoader* pImageLoader,
const CPDF_ImageObject* pImage,
CPDF_PageRenderCache* pCache,
bool bStdCS,
uint32_t GroupFamily,
bool bLoadMask,
CPDF_RenderStatus* pRenderStatus,
int32_t nDownsampleWidth,
int32_t nDownsampleHeight) {
m_pImageLoader = pImageLoader;
m_pCache = pCache;
m_pImage = const_cast<CPDF_ImageObject*>(pImage);
m_nDownsampleWidth = nDownsampleWidth;
m_nDownsampleHeight = nDownsampleHeight;
bool ret;
if (pCache) {
ret = pCache->StartGetCachedBitmap(
m_pImage->GetImage()->GetStream(), bStdCS, GroupFamily, bLoadMask,
pRenderStatus, m_nDownsampleWidth, m_nDownsampleHeight);
} else {
ret = m_pImage->GetImage()->StartLoadDIBSource(
pRenderStatus->m_pFormResource, pRenderStatus->m_pPageResource, bStdCS,
GroupFamily, bLoadMask);
}
if (!ret)
HandleFailure();
return ret;
}
bool CPDF_ImageLoaderHandle::Continue(IFX_Pause* pPause) {
bool ret = m_pCache ? m_pCache->Continue(pPause)
: m_pImage->GetImage()->Continue(pPause);
if (!ret)
HandleFailure();
return ret;
}
void CPDF_ImageLoaderHandle::HandleFailure() {
if (m_pCache) {
CPDF_ImageCacheEntry* entry = m_pCache->GetCurImageCacheEntry();
m_pImageLoader->m_bCached = true;
m_pImageLoader->m_pBitmap = entry->DetachBitmap();
m_pImageLoader->m_pMask = entry->DetachMask();
m_pImageLoader->m_MatteColor = entry->m_MatteColor;
return;
}
CPDF_Image* pImage = m_pImage->GetImage();
m_pImageLoader->m_bCached = false;
m_pImageLoader->m_pBitmap = pImage->DetachBitmap();
m_pImageLoader->m_pMask = pImage->DetachMask();
m_pImageLoader->m_MatteColor = pImage->m_MatteColor;
}
CPDF_ImageLoader::CPDF_ImageLoader()
: m_pBitmap(nullptr),
m_pMask(nullptr),
m_MatteColor(0),
m_bCached(false),
m_nDownsampleWidth(0),
m_nDownsampleHeight(0) {}
CPDF_ImageLoader::~CPDF_ImageLoader() {
if (!m_bCached) {
delete m_pBitmap;
delete m_pMask;
}
}
bool CPDF_ImageLoader::Start(const CPDF_ImageObject* pImage,
CPDF_PageRenderCache* pCache,
bool bStdCS,
uint32_t GroupFamily,
bool bLoadMask,
CPDF_RenderStatus* pRenderStatus,
int32_t nDownsampleWidth,
int32_t nDownsampleHeight) {
m_nDownsampleWidth = nDownsampleWidth;
m_nDownsampleHeight = nDownsampleHeight;
m_pLoadHandle.reset(new CPDF_ImageLoaderHandle);
return m_pLoadHandle->Start(this, pImage, pCache, bStdCS, GroupFamily,
bLoadMask, pRenderStatus, m_nDownsampleWidth,
m_nDownsampleHeight);
}
bool CPDF_ImageLoader::Continue(IFX_Pause* pPause) {
return m_pLoadHandle->Continue(pPause);
}
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