Bind GPU to screen in kernel, to allow boot errors to show up on the screen before an OS binds it.

Set resolution and depth to max in GPU's crash display (bluescreen).

src/main/resources/assets/opencomputers/lua/kernel.lua

@@ -538,28 +538,35 @@ sandbox.unicode = libunicode
 -------------------------------------------------------------------------------
 
 local function bootstrap()
-  local function tryLoadFrom(address)
-    function boot_invoke(method, ...)
-      local result = table.pack(pcall(invoke, component, true, address, method, ...))
-      if not result[1] then
-        return nil, result[2]
-      else
-        return table.unpack(result, 2, result.n)
-      end
+  function boot_invoke(address, method, ...)
+    local result = table.pack(pcall(invoke, component, true, address, method, ...))
+    if not result[1] then
+      return nil, result[2]
+    else
+      return table.unpack(result, 2, result.n)
     end
-    local handle, reason = boot_invoke("open", "/init.lua")
+  end
+  do
+    local screen = libcomponent.list("screen")()
+    local gpu = libcomponent.list("gpu")()
+    if gpu and screen then
+      boot_invoke(gpu, "bind", screen)
+    end
+  end
+  local function tryLoadFrom(address)
+    local handle, reason = boot_invoke(address, "open", "/init.lua")
     if not handle then
       return nil, reason
     end
     local buffer = ""
     repeat
-      local data, reason = boot_invoke("read", handle, math.huge)
+      local data, reason = boot_invoke(address, "read", handle, math.huge)
       if not data and reason then
         return nil, reason
       end
       buffer = buffer .. (data or "")
     until not data
-    boot_invoke("close", handle)
+    boot_invoke(address, "close", handle)
     return load(buffer, "=init", "t", sandbox)
   end
   local init, reason

src/main/scala/li/cil/oc/server/component/GraphicsCard.scala

@@ -2,13 +2,14 @@ package li.cil.oc.server.component
 
 import li.cil.oc.Settings
 import li.cil.oc.api.Network
+import li.cil.oc.api.component.TextBuffer
 import li.cil.oc.api.component.TextBuffer.ColorDepth
 import li.cil.oc.api.network._
 import li.cil.oc.common.component
 import li.cil.oc.util.PackedColor
 import net.minecraft.nbt.NBTTagCompound
 import net.minecraft.util.StatCollector
-import li.cil.oc.api.component.TextBuffer
+import scala.collection.convert.WrapAsScala._
 
 abstract class GraphicsCard extends component.ManagedComponent {
   val node = Network.newNode(this, Visibility.Neighbors).
@@ -233,36 +234,39 @@ abstract class GraphicsCard extends component.ManagedComponent {
   override def onMessage(message: Message) {
     super.onMessage(message)
     if (message.name == "computer.stopped" && node.isNeighborOf(message.source)) {
-      screenInstance match {
-        case Some(buffer) => buffer.synchronized {
-          val w = buffer.getWidth
-          val h = buffer.getHeight
-          buffer.setForegroundColor(0xFFFFFF)
-          message.source.host match {
-            case machine: machine.Machine if machine.lastError != null =>
-              if (buffer.getColorDepth.ordinal > ColorDepth.OneBit.ordinal) buffer.setBackgroundColor(0x0000FF)
-              else buffer.setBackgroundColor(0x000000)
-              buffer.fill(0, 0, w, h, ' ')
-              try {
-                val message = "Unrecoverable error:\n" + StatCollector.translateToLocal(machine.lastError) + "\n"
-                val wrapRegEx = s"(.{1,${math.max(1, w - 2)}})\\s".r
-                val lines = wrapRegEx.replaceAllIn(message, m => m.group(1) + "\n").lines.toArray
-                for ((line, idx) <- lines.zipWithIndex) {
-                  val col = (w - line.length) / 2
-                  val row = (h - lines.length) / 2 + idx
-                  buffer.set(col, row, line, false)
-                }
+      screen(s => {
+        val (gmw, gmh) = maxResolution
+        val smw = s.getMaximumWidth
+        val smh = s.getMaximumHeight
+        s.setResolution(math.min(gmw, smw), math.min(gmh, smh))
+        s.setColorDepth(ColorDepth.values.apply(math.min(maxDepth.ordinal, s.getMaximumColorDepth.ordinal)))
+        s.setForegroundColor(0xFFFFFF)
+        val w = s.getWidth
+        val h = s.getHeight
+        message.source.host match {
+          case machine: machine.Machine if machine.lastError != null =>
+            if (s.getColorDepth.ordinal > ColorDepth.OneBit.ordinal) s.setBackgroundColor(0x0000FF)
+            else s.setBackgroundColor(0x000000)
+            s.fill(0, 0, w, h, ' ')
+            try {
+              val message = "Unrecoverable error:\n" + StatCollector.translateToLocal(machine.lastError) + "\n"
+              val wrapRegEx = s"(.{1,${math.max(1, w - 2)}})\\s".r
+              val lines = wrapRegEx.replaceAllIn(message, m => m.group(1) + "\n").lines.toArray
+              for ((line, idx) <- lines.zipWithIndex) {
+                val col = (w - line.length) / 2
+                val row = (h - lines.length) / 2 + idx
+                s.set(col, row, line, false)
               }
-              catch {
-                case t: Throwable => t.printStackTrace()
-              }
-            case _ =>
-              buffer.setBackgroundColor(0x000000)
-              buffer.fill(0, 0, w, h, ' ')
-          }
+            }
+            catch {
+              case t: Throwable => t.printStackTrace()
+            }
+          case _ =>
+            s.setBackgroundColor(0x000000)
+            s.fill(0, 0, w, h, ' ')
         }
-        case _ =>
-      }
+        null // For screen()
+      })
     }
   }