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-rw-r--r--src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java21
-rw-r--r--src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java84
2 files changed, 100 insertions, 5 deletions
diff --git a/src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java b/src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java
index 014b1641a..defb7722a 100644
--- a/src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java
+++ b/src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java
@@ -27,6 +27,7 @@
*/
package com.jogamp.graph.curve.opengl;
+import javax.media.opengl.GL;
import javax.media.opengl.GL2ES2;
import com.jogamp.opengl.util.PMVMatrix;
@@ -93,10 +94,30 @@ public abstract class GLRegion extends Region {
* Renders the associated OGL objects specifying
* current width/hight of window for multi pass rendering
* of the region.
+ * <p>
+ * User shall consider {@link RegionRenderer#enable(GL2ES2, boolean) enabling}
+ * the renderer beforehand and {@link RegionRenderer#enable(GL2ES2, boolean) disabling}
+ * it afterwards when used in conjunction with other renderer.
+ * </p>
+ * <p>
+ * Users shall also consider setting the {@link GL#glClearColor(float, float, float, float) Clear Color}
+ * appropriately:
+ * <ul>
+ * <li>If {@link GL#GL_BLEND blending} is enabled, <i>RGB</i> shall be set to text color, otherwise
+ * blending will reduce the alpha seam's contrast and the font will appear thinner.</li>
+ * <li>If {@link GL#GL_BLEND blending} is disabled, <i>RGB</i> shall be set to the actual desired background.</li>
+ * </ul>
+ * The <i>alpha</i> component shall be set to zero.
+ * Note: If {@link GL#GL_BLEND blending} is enabled, the
+ * {@link RegionRenderer} might need to be
+ * {@link RegionRenderer#create(RenderState, int, com.jogamp.graph.curve.opengl.RegionRenderer.GLCallback, com.jogamp.graph.curve.opengl.RegionRenderer.GLCallback) created}
+ * with the appropriate {@link {@link RegionRenderer.GLCallback callbacks}.
+ * </p>
* @param matrix current {@link PMVMatrix}.
* @param renderer the {@link RegionRenderer} to be used
* @param sampleCount desired multisampling sample count for msaa-rendering.
* The actual used scample-count is written back when msaa-rendering is enabled, otherwise the store is untouched.
+ * @see RegionRenderer#enable(GL2ES2, boolean)
*/
public final void draw(GL2ES2 gl, RegionRenderer renderer, int[/*1*/] sampleCount) {
if(isDirty()) {
diff --git a/src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java b/src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java
index 7e0c17eb9..1f6e532d3 100644
--- a/src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java
+++ b/src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java
@@ -29,6 +29,7 @@ package com.jogamp.graph.curve.opengl;
import java.nio.FloatBuffer;
+import javax.media.opengl.GL;
import javax.media.opengl.GL2ES2;
import javax.media.opengl.GLException;
import javax.media.opengl.fixedfunc.GLMatrixFunc;
@@ -49,23 +50,75 @@ public abstract class RegionRenderer {
protected static final boolean DEBUG = Region.DEBUG;
protected static final boolean DEBUG_INSTANCE = Region.DEBUG_INSTANCE;
+ public interface GLCallback {
+ /**
+ * @param gl a current GL object
+ * @param renderer {@link RegionRenderer} calling this method.
+ */
+ void run(GL gl, RegionRenderer renderer);
+ }
+
+ /**
+ * Default {@link GL#GL_BLEND} <i>enable</i> {@link GLCallback},
+ * turning on the {@link GL#GL_BLEND} state and setting up
+ * {@link GL#glBlendFunc(int, int) glBlendFunc}({@link GL#GL_SRC_ALPHA}, {@link GL#GL_ONE_MINUS_SRC_ALPHA}).
+ * @see #setEnableCallback(GLCallback, GLCallback)
+ * @see #enable(GL2ES2, boolean)
+ */
+ public static final GLCallback defaultBlendEnable = new GLCallback() {
+ @Override
+ public void run(final GL gl, final RegionRenderer args) {
+ gl.glEnable(GL.GL_BLEND);
+ gl.glBlendEquation(GL.GL_FUNC_ADD); // default
+ gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
+ }
+ };
+
+ /**
+ * Default {@link GL#GL_BLEND} <i>disable</i> {@link GLCallback},
+ * simply turning off the {@link GL#GL_BLEND} state.
+ * @see #setEnableCallback(GLCallback, GLCallback)
+ * @see #enable(GL2ES2, boolean)
+ */
+ public static final GLCallback defaultBlendDisable = new GLCallback() {
+ @Override
+ public void run(final GL gl, final RegionRenderer args) {
+ gl.glDisable(GL.GL_BLEND);
+ }
+ };
+
public static boolean isWeightValid(float v) {
return 0.0f <= v && v <= 1.9f ;
}
/**
* Create a Hardware accelerated Region Renderer.
+ * <p>
+ * The optional {@link GLCallback}s <code>enableCallback</code> and <code>disableCallback</code>
+ * maybe used to issue certain tasks at {@link #enable(GL2ES2, boolean)}.<br/>
+ * For example, instances {@link #defaultBlendEnable} and {@link #defaultBlendDisable}
+ * can be utilized to enable and disable {@link GL#GL_BLEND}.
+ * </p>
* @param rs the used {@link RenderState}
* @param renderModes bit-field of modes, e.g. {@link Region#VARIABLE_CURVE_WEIGHT_BIT}, {@link Region#VBAA_RENDERING_BIT}
+ * @param enableCallback optional {@link GLCallback}, if not <code>null</code> will be issued at
+ * {@link #init(GL2ES2) init(gl)} and {@link #enable(GL2ES2, boolean) enable(gl, true)}.
+ * @param disableCallback optional {@link GLCallback}, if not <code>null</code> will be issued at
+ * {@link #enable(GL2ES2, boolean) enable(gl, false)}.
* @return an instance of Region Renderer
+ * @see #enable(GL2ES2, boolean)
*/
- public static RegionRenderer create(RenderState rs, int renderModes) {
- return new jogamp.graph.curve.opengl.RegionRendererImpl01(rs, renderModes);
+ public static RegionRenderer create(final RenderState rs, final int renderModes,
+ final GLCallback enableCallback, final GLCallback disableCallback) {
+ return new jogamp.graph.curve.opengl.RegionRendererImpl01(rs, renderModes, enableCallback, disableCallback);
}
protected final int renderModes;
protected final RenderState rs;
+ protected final GLCallback enableCallback;
+ protected final GLCallback disableCallback;
+
protected int vp_width;
protected int vp_height;
protected boolean initialized;
@@ -96,9 +149,11 @@ public abstract class RegionRenderer {
* @param rs the used {@link RenderState}
* @param renderModes bit-field of modes
*/
- protected RegionRenderer(RenderState rs, int renderModes) {
+ protected RegionRenderer(final RenderState rs, final int renderModes, final GLCallback enableCallback, final GLCallback disableCallback) {
this.rs = rs;
this.renderModes = renderModes;
+ this.enableCallback = enableCallback;
+ this.disableCallback = disableCallback;
}
public final int getRenderModes() {
@@ -148,8 +203,9 @@ public abstract class RegionRenderer {
rs.attachTo(gl);
- gl.glEnable(GL2ES2.GL_BLEND);
- gl.glBlendFunc(GL2ES2.GL_SRC_ALPHA, GL2ES2.GL_ONE_MINUS_SRC_ALPHA); // FIXME: alpha blending stage ?
+ if( null != enableCallback ) {
+ enableCallback.run(gl, this);
+ }
initialized = initImpl(gl);
if(!initialized) {
@@ -191,7 +247,25 @@ public abstract class RegionRenderer {
public final RenderState getRenderState() { return rs; }
public final ShaderState getShaderState() { return rs.getShaderState(); }
+ /**
+ * Enabling or disabling the {@link RenderState#getShaderState() RenderState}'s
+ * {@link ShaderState#useProgram(GL2ES2, boolean) ShaderState program}.
+ * <p>
+ * In case enable and disable {@link GLCallback}s are setup via {@link #create(RenderState, int, GLCallback, GLCallback)},
+ * they will be called before toggling the shader program.
+ * </p>
+ * @see #create(RenderState, int, GLCallback, GLCallback)
+ */
public final void enable(GL2ES2 gl, boolean enable) {
+ if( enable ) {
+ if( null != enableCallback ) {
+ enableCallback.run(gl, this);
+ }
+ } else {
+ if( null != disableCallback ) {
+ disableCallback.run(gl, this);
+ }
+ }
rs.getShaderState().useProgram(gl, enable);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 16:02:54 +0000