bedit: Made it use VRAM buffer, added support for a custom offset

halyde/apps/bedit.lua

@@ -1,5 +1,9 @@
 local fs = require("filesystem")
 local shell = require("shell")
+local gpu = require("component").gpu
+
+local resX, resY = gpu.getResolution()
+local textBuffer = gpu.allocateBuffer(resX, resY - 1)
 
 local args = {...}
 local file = args[1]
@@ -31,6 +35,20 @@ for line in data:gmatch("[^\r\n]+") do
   table.insert(lines, line)
 end
 
-for _, line in ipairs(lines) do
+local function renderText(xOffset, yOffset)
-    print(line)
+  gpu.setActiveBuffer(textBuffer)
-end
+  gpu.setBackground(0x000000)
+  gpu.setForeground(0xFFFFFF)
+  gpu.fill(1, 1, resX, resY - 1, " ")
+  for i = yOffset + 1, #lines do
+    gpu.set(1, i - yOffset, lines[i]:sub(xOffset + 1))
+  end
+  gpu.setActiveBuffer(0)
+  gpu.bitblt(0, 1, 1, resX, resY - 1, textBuffer, 1, 1)
+end
+
+renderText(args[2], args[3])
+
+-- Cleanup
+gpu.freeBuffer(textBuffer)
+gpu.setActiveBuffer(0)