// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "xfa/fde/fde_render.h"
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#include "xfa/fde/fde_gedevice.h"
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#include "xfa/fde/fde_object.h"
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#include "xfa/fgas/crt/fgas_memory.h"
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#define FDE_PATHRENDER_Stroke 1
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#define FDE_PATHRENDER_Fill 2
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CFDE_RenderContext::CFDE_RenderContext()
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: m_eStatus(FDE_RENDERSTATUS_Reset),
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m_pRenderDevice(nullptr),
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m_Transform(),
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m_pCharPos(nullptr),
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m_iCharPosCount(0) {
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m_Transform.SetIdentity();
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}
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CFDE_RenderContext::~CFDE_RenderContext() {
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StopRender();
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}
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FX_BOOL CFDE_RenderContext::StartRender(CFDE_RenderDevice* pRenderDevice,
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IFDE_CanvasSet* pCanvasSet,
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const CFX_Matrix& tmDoc2Device) {
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if (m_pRenderDevice)
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return FALSE;
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if (!pRenderDevice)
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return FALSE;
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if (!pCanvasSet)
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return FALSE;
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m_eStatus = FDE_RENDERSTATUS_Paused;
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m_pRenderDevice = pRenderDevice;
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m_Transform = tmDoc2Device;
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if (!m_pIterator)
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m_pIterator.reset(new CFDE_VisualSetIterator);
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return m_pIterator->AttachCanvas(pCanvasSet) && m_pIterator->FilterObjects();
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}
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FDE_RENDERSTATUS CFDE_RenderContext::DoRender(IFX_Pause* pPause) {
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if (!m_pRenderDevice)
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return FDE_RENDERSTATUS_Failed;
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if (!m_pIterator)
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return FDE_RENDERSTATUS_Failed;
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FDE_RENDERSTATUS eStatus = FDE_RENDERSTATUS_Paused;
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CFX_Matrix rm;
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rm.SetReverse(m_Transform);
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CFX_RectF rtDocClip = m_pRenderDevice->GetClipRect();
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if (rtDocClip.IsEmpty()) {
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rtDocClip.left = rtDocClip.top = 0;
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rtDocClip.width = (FX_FLOAT)m_pRenderDevice->GetWidth();
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rtDocClip.height = (FX_FLOAT)m_pRenderDevice->GetHeight();
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}
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rm.TransformRect(rtDocClip);
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IFDE_VisualSet* pVisualSet;
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FDE_TEXTEDITPIECE* pPiece;
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CFX_RectF rtObj;
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int32_t iCount = 0;
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while (TRUE) {
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pPiece = m_pIterator->GetNext(pVisualSet);
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if (!pPiece || !pVisualSet) {
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eStatus = FDE_RENDERSTATUS_Done;
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break;
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}
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rtObj.Empty();
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pVisualSet->GetRect(pPiece, rtObj);
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if (!rtDocClip.IntersectWith(rtObj))
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continue;
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switch (pVisualSet->GetType()) {
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case FDE_VISUALOBJ_Text:
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RenderText(static_cast<IFDE_TextSet*>(pVisualSet), pPiece);
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iCount += 5;
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break;
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case FDE_VISUALOBJ_Canvas:
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ASSERT(FALSE);
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break;
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default:
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break;
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}
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if (iCount >= 100 && pPause && pPause->NeedToPauseNow()) {
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eStatus = FDE_RENDERSTATUS_Paused;
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break;
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}
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}
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return m_eStatus = eStatus;
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}
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void CFDE_RenderContext::StopRender() {
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m_eStatus = FDE_RENDERSTATUS_Reset;
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m_pRenderDevice = nullptr;
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m_Transform.SetIdentity();
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m_pIterator.reset();
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m_pBrush.reset();
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FX_Free(m_pCharPos);
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m_pCharPos = nullptr;
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m_iCharPosCount = 0;
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}
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void CFDE_RenderContext::RenderText(IFDE_TextSet* pTextSet,
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FDE_TEXTEDITPIECE* pText) {
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ASSERT(m_pRenderDevice);
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ASSERT(pTextSet && pText);
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CFGAS_GEFont* pFont = pTextSet->GetFont();
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if (!pFont)
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return;
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int32_t iCount = pTextSet->GetDisplayPos(pText, nullptr, FALSE);
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if (iCount < 1)
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return;
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if (!m_pBrush)
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m_pBrush.reset(new CFDE_Brush);
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if (!m_pCharPos)
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m_pCharPos = FX_Alloc(FXTEXT_CHARPOS, iCount);
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else if (m_iCharPosCount < iCount)
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m_pCharPos = FX_Realloc(FXTEXT_CHARPOS, m_pCharPos, iCount);
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if (m_iCharPosCount < iCount)
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m_iCharPosCount = iCount;
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iCount = pTextSet->GetDisplayPos(pText, m_pCharPos, FALSE);
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FX_FLOAT fFontSize = pTextSet->GetFontSize();
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FX_ARGB dwColor = pTextSet->GetFontColor();
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m_pBrush->SetColor(dwColor);
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m_pRenderDevice->DrawString(m_pBrush.get(), pFont, m_pCharPos, iCount,
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fFontSize, &m_Transform);
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}
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