Fixed scissors when using a small cam with render texture

Author: photonstorm

src/cameras/2d/Camera.js

@@ -261,6 +261,8 @@ var Camera = new Class({
     /**
      * Sets the Camera to render to a texture instead of to the main display.
      * 
+     * Make sure that you resize the camera first if you're going to use this feature.
+     * 
      * This is an experimental feature and should be expected to change in the future.
      *
      * @method Phaser.Cameras.Scene2D.Camera#setRenderToTexture

src/renderer/webgl/WebGLRenderer.js

@@ -1530,14 +1530,14 @@ var WebGLRenderer = new Class({
         var cw = camera._cw;
         var ch = camera._ch;
 
-        this.pushScissor(cx, cy, cw, ch);
-
         var TextureTintPipeline = this.pipelines.TextureTintPipeline;
 
         var color = camera.backgroundColor;
 
         if (camera.renderToTexture)
         {
+            this.pushScissor(cx, cy, cw, -ch);
+
             this.setFramebuffer(camera.framebuffer);
 
             var gl = this.gl;
@@ -1546,25 +1546,31 @@ var WebGLRenderer = new Class({
 
             gl.clear(gl.COLOR_BUFFER_BIT);
 
-            TextureTintPipeline.projOrtho(0, camera.width, 0, camera.height, -1000, 1000);
+            TextureTintPipeline.projOrtho(cx, cw + cx, cy, ch + cy, -1000, 1000);
 
             if (color.alphaGL > 0)
             {
                 TextureTintPipeline.drawFillRect(
-                    cx, cy, cw, ch,
+                    0, 0, cw + cx, ch + cy,
                     Utils.getTintFromFloats(color.redGL, color.greenGL, color.blueGL, 1),
                     color.alphaGL
                 );
             }
         }
         else if (color.alphaGL > 0)
         {
+            this.pushScissor(cx, cy, cw, ch);
+
             TextureTintPipeline.drawFillRect(
-                cx, cy, cw, ch,
+                0, 0, cw + cx, ch + cy,
                 Utils.getTintFromFloats(color.redGL, color.greenGL, color.blueGL, 1),
                 color.alphaGL
             );
         }
+        else
+        {
+            this.pushScissor(cx, cy, cw, ch);
+        }
     },
 
     /**

src/renderer/webgl/pipelines/TextureTintPipeline.js

@@ -733,9 +733,6 @@ var TextureTintPipeline = new Class({
         var width = srcWidth;
         var height = srcHeight;
 
-        // var x = -displayOriginX + frameX;
-        // var y = -displayOriginY + frameY;
-
         var x = -displayOriginX;
         var y = -displayOriginY;
 
@@ -789,13 +786,6 @@ var TextureTintPipeline = new Class({
             y += srcHeight;
         }
 
-        //  Do we need this? (doubt it)
-        // if (camera.roundPixels)
-        // {
-        //     x |= 0;
-        //     y |= 0;
-        // }
-
         var xw = x + width;
         var yh = y + height;