Add scalable OpenSans font test GUI and /kamkeel testfont command

src/main/java/kamkeel/npcs/client/gui/GuiFontTest.java

@@ -0,0 +1,75 @@
+package kamkeel.npcs.client.gui;
+
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
+import kamkeel.npcs.client.renderer.font.ScalableFontRenderer;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.GuiScreen;
+import net.minecraft.client.gui.ScaledResolution;
+import org.lwjgl.opengl.GL11;
+
+@SideOnly(Side.CLIENT)
+public class GuiFontTest extends GuiScreen {
+    private static final int[] SIZES = new int[]{8, 12, 16, 24, 32, 48, 64};
+    private final ScalableFontRenderer renderer = ScalableFontRenderer.get();
+
+    @Override
+    public void drawScreen(int mouseX, int mouseY, float partialTicks) {
+        this.drawDefaultBackground();
+
+        ScaledResolution scaled = new ScaledResolution(this.mc, this.mc.displayWidth, this.mc.displayHeight);
+        int scaleFactor = scaled.getScaleFactor();
+
+        float startX = 30f;
+        float y = 16f;
+
+        renderer.drawString("Kamkeel Font Test (OpenSans.ttf)", startX, y, 24f, 0xFFFFFFFF);
+        y += 32f;
+
+        renderer.drawString("renderer=" + renderer.getRendererPath() + " atlas=" + renderer.getAtlasWidth() + "x" + renderer.getAtlasHeight(), startX, y, 12f, 0xFFE0E0E0);
+        y += 14f;
+        renderer.drawString("guiScaleSetting=" + Minecraft.getMinecraft().gameSettings.guiScale + " scaleFactor=" + scaleFactor, startX, y, 12f, 0xFFE0E0E0);
+        y += 20f;
+
+        float maxX = this.width - 24f;
+        for (int size : SIZES) {
+            float baseline = y + size;
+            drawBaseline(startX, maxX, baseline);
+            String line = "size " + size + " -> The quick brown fox jumps over 1234567890";
+            renderer.drawString(line, startX, y, size, 0xFFFFFFFF);
+            y += Math.max(renderer.getLineHeight(size), size + 10f);
+        }
+
+        super.drawScreen(mouseX, mouseY, partialTicks);
+    }
+
+    private void drawBaseline(float x0, float x1, float y) {
+        GL11.glDisable(GL11.GL_TEXTURE_2D);
+        GL11.glEnable(GL11.GL_BLEND);
+        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
+        GL11.glColor4f(0.2f, 0.8f, 1.0f, 0.45f);
+        GL11.glLineWidth(1.0f);
+
+        GL11.glBegin(GL11.GL_LINES);
+        GL11.glVertex2f(x0, y);
+        GL11.glVertex2f(x1, y);
+        GL11.glEnd();
+
+        GL11.glEnable(GL11.GL_TEXTURE_2D);
+        GL11.glColor4f(1f, 1f, 1f, 1f);
+    }
+
+    @Override
+    protected void keyTyped(char typedChar, int keyCode) {
+        if (keyCode == 1) {
+            this.mc.displayGuiScreen(null);
+            return;
+        }
+        super.keyTyped(typedChar, keyCode);
+    }
+
+    @Override
+    public boolean doesGuiPauseGame() {
+        return false;
+    }
+}