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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
#include "xfa/fde/fde_render.h"
#include "xfa/fde/fde_gedevice.h"
#include "xfa/fde/fde_object.h"
#include "xfa/fgas/crt/fgas_memory.h"
#define FDE_PATHRENDER_Stroke 1
#define FDE_PATHRENDER_Fill 2
CFDE_RenderContext::CFDE_RenderContext()
: m_eStatus(FDE_RENDERSTATUS_Reset),
m_pRenderDevice(nullptr),
m_pBrush(nullptr),
m_Transform(),
m_pCharPos(nullptr),
m_iCharPosCount(0),
m_pIterator(nullptr) {
m_Transform.SetIdentity();
}
CFDE_RenderContext::~CFDE_RenderContext() {
StopRender();
}
FX_BOOL CFDE_RenderContext::StartRender(CFDE_RenderDevice* pRenderDevice,
IFDE_CanvasSet* pCanvasSet,
const CFX_Matrix& tmDoc2Device) {
if (m_pRenderDevice)
return FALSE;
if (!pRenderDevice)
return FALSE;
if (!pCanvasSet)
return FALSE;
m_eStatus = FDE_RENDERSTATUS_Paused;
m_pRenderDevice = pRenderDevice;
m_Transform = tmDoc2Device;
if (!m_pIterator)
m_pIterator = new CFDE_VisualSetIterator;
return m_pIterator->AttachCanvas(pCanvasSet) && m_pIterator->FilterObjects();
}
FDE_RENDERSTATUS CFDE_RenderContext::DoRender(IFX_Pause* pPause) {
if (!m_pRenderDevice)
return FDE_RENDERSTATUS_Failed;
if (!m_pIterator)
return FDE_RENDERSTATUS_Failed;
FDE_RENDERSTATUS eStatus = FDE_RENDERSTATUS_Paused;
CFX_Matrix rm;
rm.SetReverse(m_Transform);
CFX_RectF rtDocClip = m_pRenderDevice->GetClipRect();
if (rtDocClip.IsEmpty()) {
rtDocClip.left = rtDocClip.top = 0;
rtDocClip.width = (FX_FLOAT)m_pRenderDevice->GetWidth();
rtDocClip.height = (FX_FLOAT)m_pRenderDevice->GetHeight();
}
rm.TransformRect(rtDocClip);
IFDE_VisualSet* pVisualSet;
FDE_HVISUALOBJ hVisualObj;
CFX_RectF rtObj;
int32_t iCount = 0;
while (TRUE) {
hVisualObj = m_pIterator->GetNext(pVisualSet);
if (!hVisualObj || !pVisualSet) {
eStatus = FDE_RENDERSTATUS_Done;
break;
}
rtObj.Empty();
pVisualSet->GetRect(hVisualObj, rtObj);
if (!rtDocClip.IntersectWith(rtObj))
continue;
switch (pVisualSet->GetType()) {
case FDE_VISUALOBJ_Text:
RenderText((IFDE_TextSet*)pVisualSet, hVisualObj);
iCount += 5;
break;
case FDE_VISUALOBJ_Canvas:
ASSERT(FALSE);
break;
default:
break;
}
if (iCount >= 100 && pPause && pPause->NeedToPauseNow()) {
eStatus = FDE_RENDERSTATUS_Paused;
break;
}
}
return m_eStatus = eStatus;
}
void CFDE_RenderContext::StopRender() {
m_eStatus = FDE_RENDERSTATUS_Reset;
m_pRenderDevice = nullptr;
m_Transform.SetIdentity();
if (m_pIterator) {
m_pIterator->Release();
m_pIterator = nullptr;
}
delete m_pBrush;
m_pBrush = nullptr;
FX_Free(m_pCharPos);
m_pCharPos = nullptr;
m_iCharPosCount = 0;
}
void CFDE_RenderContext::RenderText(IFDE_TextSet* pTextSet,
FDE_HVISUALOBJ hText) {
ASSERT(m_pRenderDevice);
ASSERT(pTextSet && hText);
IFX_Font* pFont = pTextSet->GetFont(hText);
if (!pFont)
return;
int32_t iCount = pTextSet->GetDisplayPos(hText, nullptr, FALSE);
if (iCount < 1)
return;
if (!m_pBrush)
m_pBrush = new CFDE_Brush;
if (!m_pCharPos)
m_pCharPos = FX_Alloc(FXTEXT_CHARPOS, iCount);
else if (m_iCharPosCount < iCount)
m_pCharPos = FX_Realloc(FXTEXT_CHARPOS, m_pCharPos, iCount);
if (m_iCharPosCount < iCount)
m_iCharPosCount = iCount;
iCount = pTextSet->GetDisplayPos(hText, m_pCharPos, FALSE);
FX_FLOAT fFontSize = pTextSet->GetFontSize(hText);
FX_ARGB dwColor = pTextSet->GetFontColor(hText);
m_pBrush->SetColor(dwColor);
FDE_HDEVICESTATE hState;
FX_BOOL bClip = ApplyClip(pTextSet, hText, hState);
m_pRenderDevice->DrawString(m_pBrush, pFont, m_pCharPos, iCount, fFontSize,
&m_Transform);
if (bClip)
RestoreClip(hState);
}
FX_BOOL CFDE_RenderContext::ApplyClip(IFDE_VisualSet* pVisualSet,
FDE_HVISUALOBJ hObj,
FDE_HDEVICESTATE& hState) {
CFX_RectF rtClip;
if (!pVisualSet->GetClip(hObj, rtClip))
return FALSE;
CFX_RectF rtObj;
pVisualSet->GetRect(hObj, rtObj);
rtClip.Offset(rtObj.left, rtObj.top);
m_Transform.TransformRect(rtClip);
const CFX_RectF& rtDevClip = m_pRenderDevice->GetClipRect();
rtClip.Intersect(rtDevClip);
hState = m_pRenderDevice->SaveState();
return m_pRenderDevice->SetClipRect(rtClip);
}
void CFDE_RenderContext::RestoreClip(FDE_HDEVICESTATE hState) {
m_pRenderDevice->RestoreState(hState);
}
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