Initializing textures with small patches to avoid use of large arrays

java/libraries/opengl/src/processing/opengl/PGL.java

@@ -108,6 +108,9 @@ public class PGL {
    * vertices to have good room for vertex reuse. */
   public static final int MAX_TESS_INDICES  = 2 * MAX_TESS_VERTICES;  
   
+  /** Maximum dimension of a texture used to hold font data. **/
+  public static final int MAX_FONT_TEX_SIZE = 2048;
+  
   public static final int LESS              = GL.GL_LESS;
   public static final int LESS_OR_EQUAL     = GL.GL_LEQUAL;
   public static final int COUNTER_CLOCKWISE = GL.GL_CCW;

java/libraries/opengl/src/processing/opengl/PGraphicsOpenGL.java

@@ -3146,7 +3146,8 @@ public class PGraphicsOpenGL extends PGraphics {
   protected void textLineImpl(char buffer[], int start, int stop, float x, float y) {
     textTex = (PFontTexture)textFont.getCache(pg);        
     if (textTex == null) {
-      textTex = new PFontTexture(parent, textFont, maxTextureSize, maxTextureSize);
+      textTex = new PFontTexture(parent, textFont, PApplet.min(PGL.MAX_FONT_TEX_SIZE, maxTextureSize), 
+                                                   PApplet.min(PGL.MAX_FONT_TEX_SIZE, maxTextureSize));
       textFont.setCache(this, textTex);
     } else {
       if (!pgl.contextIsCurrent(textTex.context)) {

java/libraries/opengl/src/processing/opengl/PTexture.java

@@ -788,9 +788,18 @@ public class PTexture implements PConstants {
     pgl.initTex(glTarget, glFormat, glWidth, glHeight);
     
     // Once OpenGL knows the size of the new texture, we make sure it doesn't
-    // contain any garbage in the region of interest (0, 0, width, height):
-    int[] texels = new int[width * height];
-    setTexels(texels, 0, 0, width, height); 
+    // contain any garbage in the region of interest (0, 0, width, height):        
+    // Doing in patches of 16x16 pixels to avoid creating a (potentially)
+    // very large transient array which in certain situations (memory-
+    // constrained android devices) might lead to an out-of-memory error.
+    int[] texels = new int[16 * 16];
+    for (int y = 0; y < height + 16; y += 16) {
+      int h = PApplet.min(16, height - y);
+      for (int x = 0; x < width + 16; x += 16) {
+        int w = PApplet.min(16, width - x);
+        setTexels(texels, x, y, w, h);        
+      }
+    }
     texels = null;
     
     pgl.unbindTexture(glTarget);