--User changes

-Add support for multiple GPU devices.
  --These options are present in the command line and in Fractorium.
 -Change scheme of specifying devices from platform,device to just total device index.
  --Single number on the command line.
  --Change from combo boxes for device selection to a table of all devices in Fractorium.
 -Temporal samples defaults to 100 instead of 1000 which was needless overkill.

--Bug fixes
 -EmberAnimate, EmberRender, FractoriumSettings, FinalRenderDialog: Fix wrong order of arguments to Clamp() when assigning thread priority.
 -VariationsDC.h: Fix NVidia OpenCL compilation error in DCTriangleVariation.
 -FractoriumXformsColor.cpp: Checking for null pixmap pointer is not enough, must also check if the underlying buffer is null via call to QPixmap::isNull().

--Code changes
 -Ember.h: Add case for FLAME_MOTION_NONE and default in ApplyFlameMotion().
 -EmberMotion.h: Call base constructor.
 -EmberPch.h: #pragma once only on Windows.
 -EmberToXml.h:
  --Handle different types of exceptions.
  --Add default cases to ToString().
 -Isaac.h: Remove unused variable in constructor.
 -Point.h: Call base constructor in Color().
 -Renderer.h/cpp:
  --Add bool to Alloc() to only allocate memory for the histogram. Needed for multi-GPU.
  --Make CoordMap() return a const ref, not a pointer.
 -SheepTools.h:
  --Use 64-bit types like the rest of the code already does.
  --Fix some comment misspellings.
 -Timing.h: Make BeginTime(), EndTime(), ElapsedTime() and Format() be const functions.
 -Utils.h:
  --Add new functions Equal() and Split().
  --Handle more exception types in ReadFile().
  --Get rid of most legacy blending of C and C++ argument parsing.
 -XmlToEmber.h:
  --Get rid of most legacy blending of C and C++ code from flam3.
  --Remove some unused variables.
 -EmberAnimate:
  --Support multi-GPU processing that alternates full frames between devices.
  --Use OpenCLInfo instead of OpenCLWrapper for --openclinfo option.
  --Remove bucketT template parameter, and hard code float in its place.
  --If a render fails, exit since there is no point in continuing an animation with a missing frame.
  --Pass variables to threaded save better, which most likely fixes a very subtle bug that existed before.
  --Remove some unused variables.
 -EmberGenome, EmberRender:
  --Support multi-GPU processing that alternates full frames between devices.
  --Use OpenCLInfo instead of OpenCLWrapper for --openclinfo option.
  --Remove bucketT template parameter, and hard code float in its place.
 -EmberRender:
  --Support multi-GPU processing that alternates full frames between devices.
  --Use OpenCLInfo instead of OpenCLWrapper for --openclinfo option.
  --Remove bucketT template parameter, and hard code float in its place.
  --Only print values when not rendering with OpenCL, since they're always 0 in that case.
 -EmberCLPch.h:
  --#pragma once only on Windows.
  --#include <atomic>.
 -IterOpenCLKernelCreator.h: Add new kernel for summing two histograms. This is needed for multi-GPU.
 -OpenCLWrapper.h:
  --Move all OpenCL info related code into its own class OpenCLInfo.
  --Add members to cache the values of global memory size and max allocation size.
 -RendererCL.h/cpp:
  --Redesign to accomodate multi-GPU.
  --Constructor now takes a vector of devices.
  --Remove DumpErrorReport() function, it's handled in the base.
  --ClearBuffer(), ReadPoints(), WritePoints(), ReadHist() and WriteHist() now optionally take a device index as a parameter.
  --MakeDmap() override and m_DmapCL member removed because it no longer applies since the histogram is always float since the last commit.
  --Add new function SumDeviceHist() to sum histograms from two devices by first copying to a temporary on the host, then a temporary on the device, then summing.
  --m_Calls member removed, as it's now per-device.
  --OpenCLWrapper removed.
  --m_Seeds member is now a vector of vector of seeds, to accomodate a separate and different array of seeds for each device.
  --Added member m_Devices, a vector of unique_ptr of RendererCLDevice.
 -EmberCommon.h
  --Added Devices() function to convert from a vector of device indices to a vector of platform,device indices.
  --Changed CreateRenderer() to accept a vector of devices to create a single RendererCL which will split work across multiple devices.
  --Added CreateRenderers() function to accept a vector of devices to create multiple RendererCL, each which will render on a single device.
  --Add more comments to some existing functions.
 -EmberCommonPch.h: #pragma once only on Windows.
 -EmberOptions.h:
  --Remove --platform option, it's just sequential device number now with the --device option.
  --Make --out be OPT_USE_RENDER instead of OPT_RENDER_ANIM since it's an error condition when animating. It makes no sense to write all frames to a single image.
  --Add Devices() function to parse comma separated --device option string and return a vector of device indices.
  --Make int and uint types be 64-bit, so intmax_t and size_t.
  --Make better use of macros.
 -JpegUtils.h: Make string parameters to WriteJpeg() and WritePng() be const ref.
 -All project files: Turn off buffer security check option in Visual Studio (/Gs-)
 -deployment.pri: Remove the line OTHER_FILES +=, it's pointless and was causing problems.
 -Ember.pro, EmberCL.pro: Add CONFIG += plugin, otherwise it wouldn't link.
 -EmberCL.pro: Add new files for multi-GPU support.
 -build_all.sh: use -j4 and QMAKE=${QMAKE:/usr/bin/qmake}
 -shared_settings.pri:
  -Add version string.
  -Remove old DESTDIR definitions.
  -Add the following lines or else nothing would build:
   CONFIG(release, debug|release) {
    CONFIG += warn_off
    DESTDIR = ../../../Bin/release
   }

   CONFIG(debug, debug|release) {
    DESTDIR = ../../../Bin/debug
   }

   QMAKE_POST_LINK += $$quote(cp --update ../../../Data/flam3-palettes.xml $${DESTDIR}$$escape_expand(\n\t))
   LIBS += -L/usr/lib -lpthread
 -AboutDialog.ui: Another futile attempt to make it look correct on Linux.
 -FinalRenderDialog.h/cpp:
  --Add support for multi-GPU.
  --Change from combo boxes for device selection to a table of all devices.
  --Ensure device selection makes sense.
  --Remove "FinalRender" prefix of various function names, it's implied given the context.
 -FinalRenderEmberController.h/cpp:
  --Add support for multi-GPU.
  --Change m_FinishedImageCount to be atomic.
  --Move CancelRender() from the base to FinalRenderEmberController<T>.
  --Refactor RenderComplete() to omit any progress related functionality or image saving since it can be potentially ran in a thread.
  --Consolidate setting various renderer fields into SyncGuiToRenderer().
 -Fractorium.cpp: Allow for resizing of the options dialog to show the entire device table.
 -FractoriumCommon.h: Add various functions to handle a table showing the available OpenCL devices on the system.
 -FractoriumEmberController.h/cpp: Remove m_FinalImageIndex, it's no longer needed.
 -FractoriumRender.cpp: Scale the interactive sub batch count and quality by the number of devices used.
 -FractoriumSettings.h/cpp:
  --Temporal samples defaults to 100 instead of 1000 which was needless overkill.
  --Add multi-GPU support, remove old device,platform pair.
 -FractoriumToolbar.cpp: Disable OpenCL toolbar button if there are no devices present on the system.
 -FractoriumOptionsDialog.h/cpp:
  --Add support for multi-GPU.
  --Consolidate more assignments in DataToGui().
  --Enable/disable CPU/OpenCL items in response to OpenCL checkbox event.
 -Misc: Convert almost everything to size_t for unsigned, intmax_t for signed.

Source/Fractorium/FinalRenderDialog.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>519</width>
-    <height>897</height>
+    <height>899</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -64,7 +64,7 @@
         <x>0</x>
         <y>0</y>
         <width>507</width>
-        <height>885</height>
+        <height>887</height>
        </rect>
       </property>
       <layout class="QVBoxLayout" name="verticalLayout_2">
@@ -240,9 +240,9 @@
         </layout>
        </item>
        <item>
-        <widget class="QComboBox" name="FinalRenderPlatformCombo">
+        <widget class="QTableWidget" name="DeviceTable">
          <property name="sizePolicy">
-          <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+          <sizepolicy hsizetype="MinimumExpanding" vsizetype="MinimumExpanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
@@ -250,37 +250,81 @@
          <property name="minimumSize">
           <size>
            <width>0</width>
-           <height>0</height>
+           <height>91</height>
           </size>
          </property>
          <property name="maximumSize">
           <size>
            <width>16777215</width>
-           <height>16777215</height>
+           <height>91</height>
           </size>
          </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QComboBox" name="FinalRenderDeviceCombo">
-         <property name="sizePolicy">
-          <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
-           <horstretch>0</horstretch>
-           <verstretch>0</verstretch>
-          </sizepolicy>
+         <property name="focusPolicy">
+          <enum>Qt::NoFocus</enum>
          </property>
-         <property name="minimumSize">
-          <size>
-           <width>0</width>
-           <height>0</height>
-          </size>
+         <property name="editTriggers">
+          <set>QAbstractItemView::NoEditTriggers</set>
          </property>
-         <property name="maximumSize">
-          <size>
-           <width>16777215</width>
-           <height>16777215</height>
-          </size>
+         <property name="selectionMode">
+          <enum>QAbstractItemView::NoSelection</enum>
          </property>
+         <property name="selectionBehavior">
+          <enum>QAbstractItemView::SelectRows</enum>
+         </property>
+         <property name="showGrid">
+          <bool>true</bool>
+         </property>
+         <property name="columnCount">
+          <number>3</number>
+         </property>
+         <attribute name="horizontalHeaderDefaultSectionSize">
+          <number>60</number>
+         </attribute>
+         <attribute name="horizontalHeaderStretchLastSection">
+          <bool>true</bool>
+         </attribute>
+         <attribute name="verticalHeaderVisible">
+          <bool>false</bool>
+         </attribute>
+         <attribute name="verticalHeaderDefaultSectionSize">
+          <number>22</number>
+         </attribute>
+         <attribute name="verticalHeaderHighlightSections">
+          <bool>false</bool>
+         </attribute>
+         <attribute name="verticalHeaderMinimumSectionSize">
+          <number>22</number>
+         </attribute>
+         <row>
+          <property name="text">
+           <string>AMD</string>
+          </property>
+         </row>
+         <row>
+          <property name="text">
+           <string>Nvidia</string>
+          </property>
+         </row>
+         <row>
+          <property name="text">
+           <string>Intel</string>
+          </property>
+         </row>
+         <column>
+          <property name="text">
+           <string>Use</string>
+          </property>
+         </column>
+         <column>
+          <property name="text">
+           <string>Primary</string>
+          </property>
+         </column>
+         <column>
+          <property name="text">
+           <string>Device</string>
+          </property>
+         </column>
         </widget>
        </item>
        <item>
@@ -1119,8 +1163,6 @@
   <tabstop>FinalRenderYAxisUpCheckBox</tabstop>
   <tabstop>FinalRenderTransparencyCheckBox</tabstop>
   <tabstop>FinalRenderOpenCLCheckBox</tabstop>
-  <tabstop>FinalRenderPlatformCombo</tabstop>
-  <tabstop>FinalRenderDeviceCombo</tabstop>
   <tabstop>FinalRenderParamsTable</tabstop>
   <tabstop>FinalRenderTextOutput</tabstop>
   <tabstop>StartRenderButton</tabstop>