Bug 1465 - Graph / GraphUI: Render a Region's ColorTexture in proper aspect-ratio, letter-boxed or zoomed (config) + Bug 1466 Fix color mixing

Bug 1465: Region currently simply bloats a given texture to its region AABBox,
which renders textures with the wrong aspect ratio.

Add facility to program the texture-coordinates to either letter-box
or scaled-up (and cut) true aspect-ratio.
Default shall be zoom (scale-up and cut),
but user shall be able to set a flag in the Region for letter-box.

Have the shader clip texture coordinates properly,
best w/o branching to soothe performance.

See functions.glsl

+++

Bug 1466: Current color mix: texture * color_channel * color_static
is useless in GraphUI.

color_static shall modulate the texture, which works.
But in case of color_channel (attribute/varying)
we want it to be mixed so it can become the more dominant color
for e.g. a border.

Desired is:

color = vec4( mix( tex.rgb * gcu_ColorStatic.rgb, gcv_Color.rgb, gcv_Color.a ),
              mix( tex.a * gcu_ColorStatic.a, 1, gcv_Color.a) );

4 files changed, 16 insertions, 3 deletions

diff --git a/src/graphui/classes/com/jogamp/graph/ui/shapes/GLButton.java b/src/graphui/classes/com/jogamp/graph/ui/shapes/GLButton.java
index a8d7c4295..d5a192456 100644
--- a/src/graphui/classes/com/jogamp/graph/ui/shapes/GLButton.java
+++ b/src/graphui/classes/com/jogamp/graph/ui/shapes/GLButton.java
@@ -76,7 +76,7 @@ public class GLButton extends TexSeqButton {
         this.glel = glel;
         this.useAlpha = useAlpha;
 
-        setColor(1.0f, 1.0f, 1.0f, 1.0f);
+        setColor(1.0f, 1.0f, 1.0f, 0.0f);
         setPressedColorMod(0.9f, 0.9f, 0.9f, 0.7f);
         setToggleOffColorMod(0.8f, 0.8f, 0.8f, 1.0f);
         setToggleOnColorMod(1.0f, 1.0f, 1.0f, 1.0f);
diff --git a/src/graphui/classes/com/jogamp/graph/ui/shapes/ImageButton.java b/src/graphui/classes/com/jogamp/graph/ui/shapes/ImageButton.java
index cd919546d..d8c79d8e7 100644
--- a/src/graphui/classes/com/jogamp/graph/ui/shapes/ImageButton.java
+++ b/src/graphui/classes/com/jogamp/graph/ui/shapes/ImageButton.java
@@ -55,7 +55,7 @@ public class ImageButton extends TexSeqButton {
                        final float height, final ImageSequence texSeq) {
         super(renderModes, width, height, texSeq);
 
-        setColor(1f, 1f, 1f, 1.0f);
+        setColor(1f, 1f, 1f, 0.0f);
         setPressedColorMod(0.9f, 0.9f, 0.9f, 0.9f);
         setToggleOffColorMod(1f, 1f, 1f, 1f);
         setToggleOnColorMod(0.8f, 0.8f, 0.8f, 1f);
diff --git a/src/graphui/classes/com/jogamp/graph/ui/shapes/MediaButton.java b/src/graphui/classes/com/jogamp/graph/ui/shapes/MediaButton.java
index b73f224d1..ed44324de 100644
--- a/src/graphui/classes/com/jogamp/graph/ui/shapes/MediaButton.java
+++ b/src/graphui/classes/com/jogamp/graph/ui/shapes/MediaButton.java
@@ -68,7 +68,7 @@ public class MediaButton extends TexSeqButton {
                        final float height, final GLMediaPlayer mPlayer) {
         super(renderModes, width, height, mPlayer);
 
-        setColor(1.0f, 1.0f, 1.0f, 1.0f);
+        setColor(1.0f, 1.0f, 1.0f, 0.0f);
         setPressedColorMod(0.9f, 0.9f, 0.9f, 0.7f);
         setToggleOffColorMod(0.8f, 0.8f, 0.8f, 1.0f);
         setToggleOnColorMod(1.0f, 1.0f, 1.0f, 1.0f);
diff --git a/src/graphui/classes/com/jogamp/graph/ui/shapes/TexSeqButton.java b/src/graphui/classes/com/jogamp/graph/ui/shapes/TexSeqButton.java
index 0dbd11adf..de5c43be1 100644
--- a/src/graphui/classes/com/jogamp/graph/ui/shapes/TexSeqButton.java
+++ b/src/graphui/classes/com/jogamp/graph/ui/shapes/TexSeqButton.java
@@ -55,6 +55,19 @@ public abstract class TexSeqButton extends BaseButton {
 
     public final TextureSequence getTextureSequence() { return this.texSeq; }
 
+    /**
+     * Sets a renderMode {@link Region#COLORTEXTURE_LETTERBOX_RENDERING_BIT} on or off.
+     * @return this instance for chaining
+     */
+    public TexSeqButton setTextureLetterbox(final boolean v) {
+        if( getTextureLetterbox() != v ) {
+            renderModes = Region.setRenderMode(renderModes, Region.COLORTEXTURE_LETTERBOX_RENDERING_BIT, v);
+            markShapeDirty();
+        }
+        return this;
+    }
+    public boolean getTextureLetterbox() { return Region.isColorTextureLetterbox(renderModes); }
+
     @Override
     protected void addShapeToRegion(final GLProfile glp, final GL2ES2 gl) {
         final OutlineShape shape = createBaseShape(0f);