1 files changed, 417 insertions, 0 deletions
diff --git a/xbmc/guilib/GUIImage.cpp b/xbmc/guilib/GUIImage.cpp
new file mode 100644
index 0000000..9b7ad23
--- /dev/null
+++ b/xbmc/guilib/GUIImage.cpp
@@ -0,0 +1,417 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#include "GUIImage.h"
+
+#include "GUIMessage.h"
+#include "utils/log.h"
+
+#include <cassert>
+
+using namespace KODI::GUILIB;
+
+CGUIImage::CGUIImage(int parentID,
+                     int controlID,
+                     float posX,
+                     float posY,
+                     float width,
+                     float height,
+                     const CTextureInfo& texture)
+  : CGUIControl(parentID, controlID, posX, posY, width, height),
+    m_texture(CGUITexture::CreateTexture(posX, posY, width, height, texture))
+{
+  m_crossFadeTime = 0;
+  m_currentFadeTime = 0;
+  m_lastRenderTime = 0;
+  ControlType = GUICONTROL_IMAGE;
+  m_bDynamicResourceAlloc=false;
+}
+
+CGUIImage::CGUIImage(const CGUIImage& left)
+  : CGUIControl(left),
+    m_image(left.m_image),
+    m_info(left.m_info),
+    m_texture(left.m_texture->Clone()),
+    m_fadingTextures(),
+    m_currentTexture(),
+    m_currentFallback()
+{
+  m_crossFadeTime = left.m_crossFadeTime;
+  // defaults
+  m_currentFadeTime = 0;
+  m_lastRenderTime = 0;
+  ControlType = GUICONTROL_IMAGE;
+  m_bDynamicResourceAlloc=false;
+}
+
+CGUIImage::~CGUIImage(void) = default;
+
+void CGUIImage::UpdateVisibility(const CGUIListItem *item)
+{
+  CGUIControl::UpdateVisibility(item);
+
+  // now that we've checked for conditional info, we can
+  // check for allocation
+  AllocateOnDemand();
+}
+
+void CGUIImage::UpdateDiffuseColor(const CGUIListItem* item)
+{
+  if (m_texture->SetDiffuseColor(m_diffuseColor, item))
+  {
+    MarkDirtyRegion();
+  }
+}
+
+void CGUIImage::UpdateInfo(const CGUIListItem *item)
+{
+  // The texture may also depend on info conditions. Update the diffuse color in that case.
+  if (m_texture->GetDiffuseColor().HasInfo())
+    UpdateDiffuseColor(item);
+
+  if (m_info.IsConstant())
+    return; // nothing to do
+
+  // don't allow image to change while animating out
+  if (HasProcessed() && IsAnimating(ANIM_TYPE_HIDDEN) && !IsVisibleFromSkin())
+    return;
+
+  if (item)
+    SetFileName(m_info.GetItemLabel(item, true, &m_currentFallback));
+  else
+    SetFileName(m_info.GetLabel(m_parentID, true, &m_currentFallback));
+}
+
+void CGUIImage::AllocateOnDemand()
+{
+  // if we're hidden, we can free our resources and return
+  if (!IsVisible() && m_visible != DELAYED)
+  {
+    if (m_bDynamicResourceAlloc && m_texture->IsAllocated())
+      FreeResourcesButNotAnims();
+    return;
+  }
+
+  // either visible or delayed - we need the resources allocated in either case
+  if (!m_texture->IsAllocated())
+    AllocResources();
+}
+
+void CGUIImage::Process(unsigned int currentTime, CDirtyRegionList &dirtyregions)
+{
+  // check whether our image failed to allocate, and if so drop back to the fallback image
+  if (m_texture->FailedToAlloc() && m_texture->GetFileName() != m_info.GetFallback())
+  {
+    if (!m_currentFallback.empty() && m_texture->GetFileName() != m_currentFallback)
+      m_texture->SetFileName(m_currentFallback);
+    else
+      m_texture->SetFileName(m_info.GetFallback());
+  }
+
+  if (m_crossFadeTime)
+  {
+    // make sure our texture has started allocating
+    if (m_texture->AllocResources())
+      MarkDirtyRegion();
+
+    // compute the frame time
+    unsigned int frameTime = 0;
+    if (m_lastRenderTime)
+      frameTime = currentTime - m_lastRenderTime;
+    if (!frameTime)
+      frameTime = (unsigned int)(1000 / CServiceBroker::GetWinSystem()->GetGfxContext().GetFPS());
+    m_lastRenderTime = currentTime;
+
+    if (m_fadingTextures.size())  // have some fading images
+    { // anything other than the last old texture needs to be faded out as per usual
+      for (std::vector<CFadingTexture *>::iterator i = m_fadingTextures.begin(); i != m_fadingTextures.end() - 1;)
+      {
+        if (!ProcessFading(*i, frameTime, currentTime))
+          i = m_fadingTextures.erase(i);
+        else
+          ++i;
+      }
+
+      if (m_texture->ReadyToRender() || m_texture->GetFileName().empty())
+      { // fade out the last one as well
+        if (!ProcessFading(m_fadingTextures[m_fadingTextures.size() - 1], frameTime, currentTime))
+          m_fadingTextures.erase(m_fadingTextures.end() - 1);
+      }
+      else
+      { // keep the last one fading in
+        CFadingTexture *texture = m_fadingTextures[m_fadingTextures.size() - 1];
+        texture->m_fadeTime += frameTime;
+        if (texture->m_fadeTime > m_crossFadeTime)
+          texture->m_fadeTime = m_crossFadeTime;
+
+        if (texture->m_texture->SetAlpha(GetFadeLevel(texture->m_fadeTime)))
+          MarkDirtyRegion();
+        if (texture->m_texture->SetDiffuseColor(m_diffuseColor))
+          MarkDirtyRegion();
+        if (texture->m_texture->Process(currentTime))
+          MarkDirtyRegion();
+      }
+    }
+
+    if (m_texture->ReadyToRender() || m_texture->GetFileName().empty())
+    { // fade the new one in
+      m_currentFadeTime += frameTime;
+      if (m_currentFadeTime > m_crossFadeTime || frameTime == 0) // for if we allocate straight away on creation
+        m_currentFadeTime = m_crossFadeTime;
+    }
+    if (m_texture->SetAlpha(GetFadeLevel(m_currentFadeTime)))
+      MarkDirtyRegion();
+  }
+
+  if (!m_texture->GetDiffuseColor().HasInfo())
+    UpdateDiffuseColor(nullptr);
+
+  if (m_texture->Process(currentTime))
+    MarkDirtyRegion();
+
+  CGUIControl::Process(currentTime, dirtyregions);
+}
+
+void CGUIImage::Render()
+{
+  if (!IsVisible()) return;
+
+  for (auto& itr : m_fadingTextures)
+    itr->m_texture->Render();
+
+  m_texture->Render();
+
+  CGUIControl::Render();
+}
+
+bool CGUIImage::ProcessFading(CGUIImage::CFadingTexture *texture, unsigned int frameTime, unsigned int currentTime)
+{
+  assert(texture);
+  if (texture->m_fadeTime <= frameTime)
+  { // time to kill off the texture
+    MarkDirtyRegion();
+    delete texture;
+    return false;
+  }
+  // render this texture
+  texture->m_fadeTime -= frameTime;
+
+  if (texture->m_texture->SetAlpha(GetFadeLevel(texture->m_fadeTime)))
+    MarkDirtyRegion();
+  if (texture->m_texture->SetDiffuseColor(m_diffuseColor))
+    MarkDirtyRegion();
+  if (texture->m_texture->Process(currentTime))
+    MarkDirtyRegion();
+
+  return true;
+}
+
+bool CGUIImage::OnAction(const CAction &action)
+{
+  return false;
+}
+
+bool CGUIImage::OnMessage(CGUIMessage& message)
+{
+  if (message.GetMessage() == GUI_MSG_REFRESH_THUMBS)
+  {
+    if (!m_info.IsConstant())
+      FreeTextures(true); // true as we want to free the texture immediately
+    return true;
+  }
+  else if (message.GetMessage() == GUI_MSG_SET_FILENAME)
+  {
+    SetFileName(message.GetLabel());
+    return true;
+  }
+  else if (message.GetMessage() == GUI_MSG_GET_FILENAME)
+  {
+    message.SetLabel(GetFileName());
+    return true;
+  }
+  return CGUIControl::OnMessage(message);
+}
+
+void CGUIImage::AllocResources()
+{
+  if (m_texture->GetFileName().empty())
+    return;
+
+  CGUIControl::AllocResources();
+  m_texture->AllocResources();
+}
+
+void CGUIImage::FreeTextures(bool immediately /* = false */)
+{
+  m_texture->FreeResources(immediately);
+  for (unsigned int i = 0; i < m_fadingTextures.size(); i++)
+    delete m_fadingTextures[i];
+  m_fadingTextures.clear();
+  m_currentTexture.clear();
+  if (!m_info.IsConstant()) // constant textures never change
+    m_texture->SetFileName("");
+}
+
+void CGUIImage::FreeResources(bool immediately)
+{
+  FreeTextures(immediately);
+  CGUIControl::FreeResources(immediately);
+}
+
+void CGUIImage::SetInvalid()
+{
+  m_texture->SetInvalid();
+  CGUIControl::SetInvalid();
+}
+
+// WORKAROUND - we are currently resetting all animations when this is called, which shouldn't be the case
+//              see CGUIControl::FreeResources() - this needs remedying.
+void CGUIImage::FreeResourcesButNotAnims()
+{
+  FreeTextures();
+  m_bAllocated=false;
+  m_hasProcessed = false;
+}
+
+void CGUIImage::DynamicResourceAlloc(bool bOnOff)
+{
+  m_bDynamicResourceAlloc = bOnOff;
+  m_texture->DynamicResourceAlloc(bOnOff);
+  CGUIControl::DynamicResourceAlloc(bOnOff);
+}
+
+bool CGUIImage::CanFocus() const
+{
+  return false;
+}
+
+float CGUIImage::GetTextureWidth() const
+{
+  return m_texture->GetTextureWidth();
+}
+
+float CGUIImage::GetTextureHeight() const
+{
+  return m_texture->GetTextureHeight();
+}
+
+CRect CGUIImage::CalcRenderRegion() const
+{
+  CRect region = m_texture->GetRenderRect();
+
+  for (const auto& itr : m_fadingTextures)
+    region.Union(itr->m_texture->GetRenderRect());
+
+  return CGUIControl::CalcRenderRegion().Intersect(region);
+}
+
+const std::string &CGUIImage::GetFileName() const
+{
+  return m_texture->GetFileName();
+}
+
+void CGUIImage::SetAspectRatio(const CAspectRatio &aspect)
+{
+  m_texture->SetAspectRatio(aspect);
+}
+
+void CGUIImage::SetCrossFade(unsigned int time)
+{
+  m_crossFadeTime = time;
+  if (!m_crossFadeTime && m_texture->IsLazyLoaded() && !m_info.GetFallback().empty())
+    m_crossFadeTime = 1;
+}
+
+void CGUIImage::SetFileName(const std::string& strFileName, bool setConstant, const bool useCache)
+{
+  if (setConstant)
+    m_info.SetLabel(strFileName, "", GetParentID());
+
+  // Set whether or not to use cache
+  m_texture->SetUseCache(useCache);
+
+  if (m_crossFadeTime)
+  {
+    // set filename on the next texture
+    if (m_currentTexture == strFileName)
+      return; // nothing to do - we already have this image
+
+    if (m_texture->ReadyToRender() || m_texture->GetFileName().empty())
+    { // save the current image
+      m_fadingTextures.push_back(new CFadingTexture(m_texture.get(), m_currentFadeTime));
+      MarkDirtyRegion();
+    }
+    m_currentFadeTime = 0;
+  }
+  if (m_currentTexture != strFileName)
+  { // texture is changing - attempt to load it, and save the name in m_currentTexture.
+    // we'll check whether it loaded or not in Render()
+    m_currentTexture = strFileName;
+    if (m_texture->SetFileName(m_currentTexture))
+      MarkDirtyRegion();
+  }
+}
+
+#ifdef _DEBUG
+void CGUIImage::DumpTextureUse()
+{
+  if (m_texture->IsAllocated())
+  {
+    if (GetID())
+      CLog::Log(LOGDEBUG, "Image control {} using texture {}", GetID(), m_texture->GetFileName());
+    else
+      CLog::Log(LOGDEBUG, "Using texture {}", m_texture->GetFileName());
+  }
+}
+#endif
+
+void CGUIImage::SetWidth(float width)
+{
+  m_texture->SetWidth(width);
+  CGUIControl::SetWidth(m_texture->GetWidth());
+}
+
+void CGUIImage::SetHeight(float height)
+{
+  m_texture->SetHeight(height);
+  CGUIControl::SetHeight(m_texture->GetHeight());
+}
+
+void CGUIImage::SetPosition(float posX, float posY)
+{
+  m_texture->SetPosition(posX, posY);
+  CGUIControl::SetPosition(posX, posY);
+}
+
+void CGUIImage::SetInfo(const GUIINFO::CGUIInfoLabel &info)
+{
+  m_info = info;
+  // a constant image never needs updating
+  if (m_info.IsConstant())
+    m_texture->SetFileName(m_info.GetLabel(0));
+}
+
+unsigned char CGUIImage::GetFadeLevel(unsigned int time) const
+{
+  float amount = (float)time / m_crossFadeTime;
+  // we want a semi-transparent image, so we need to use a more complicated
+  // fade technique.  Assuming a black background (not generally true, but still...)
+  // we have
+  // b(t) = [a - b(1-t)*a] / a*(1-b(1-t)*a),
+  // where a = alpha, and b(t):[0,1] -> [0,1] is the blend function.
+  // solving, we get
+  // b(t) = [1 - (1-a)^t] / a
+  const float alpha = 0.7f;
+  return (unsigned char)(255.0f * (1 - pow(1-alpha, amount))/alpha);
+}
+
+std::string CGUIImage::GetDescription(void) const
+{
+  return GetFileName();
+}
+