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Diffstat (limited to 'src/jogl/classes/javax/media/opengl/GLFBODrawable.java')
| -rw-r--r-- | src/jogl/classes/javax/media/opengl/GLFBODrawable.java | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/jogl/classes/javax/media/opengl/GLFBODrawable.java b/src/jogl/classes/javax/media/opengl/GLFBODrawable.java new file mode 100644 index 000000000..052b08a4b --- /dev/null +++ b/src/jogl/classes/javax/media/opengl/GLFBODrawable.java @@ -0,0 +1,195 @@ +/** + * Copyright 2012 JogAmp Community. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, are + * permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this list of + * conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, this list + * of conditions and the following disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * The views and conclusions contained in the software and documentation are those of the + * authors and should not be interpreted as representing official policies, either expressed + * or implied, of JogAmp Community. + */ + +package javax.media.opengl; + +import javax.media.nativewindow.NativeWindowException; + +import com.jogamp.opengl.FBObject; +import com.jogamp.opengl.FBObject.TextureAttachment; + +/** + * Platform-independent {@link GLDrawable} specialization, + * exposing {@link FBObject} functionality. + * + * <p> + * A {@link GLFBODrawable} is uninitialized until a {@link GLContext} is bound + * and made current the first time, hence only then it's capabilities <i>fully</i> reflect expectations, + * i.e. color, depth, stencil and MSAA bits will be <i>valid</i> only after the first {@link GLContext#makeCurrent() makeCurrent()} call. + * On-/offscreen bits are <i>valid</i> after {@link #setRealized(boolean) setRealized(true)}. + * </p> + * + * <p> + * MSAA is used if {@link GLCapabilitiesImmutable#getNumSamples() requested}. + * </p> + * <p> + * Double buffering is used if {@link GLCapabilitiesImmutable#getDoubleBuffered() requested}. + * </p> + * <p> + * In MSAA mode, it always uses the implicit 2nd {@link FBObject framebuffer} {@link FBObject#getSamplingSinkFBO() sink}. + * Hence double buffering is always the case w/ MSAA. + * </p> + * <p> + * In non MSAA a second explicit {@link FBObject framebuffer} is being used. + * This method allows compliance w/ the spec, i.e. read and draw framebuffer selection + * and double buffer usage for e.g. {@link GL#glReadPixels(int, int, int, int, int, int, java.nio.Buffer) glReadPixels(..)}. + * This method also allows usage of both textures seperately. + * </p> + * <p> + * It would be possible to implement double buffering simply using + * {@link TextureAttachment}s with one {@link FBObject framebuffer}. + * This would require mode selection and hence complicate the API. Besides, it would + * not support differentiation of read and write framebuffer and hence not be spec compliant. + * </p> + * <p> + * Actual swapping of the {@link TextureAttachment texture}s and/or {@link FBObject framebuffer} + * is performed either in the {@link jogamp.opengl.GLContextImpl#contextMadeCurrent(boolean) context current hook} + * or when {@link jogamp.opengl.GLDrawableImpl#swapBuffersImpl(boolean) swapping buffers}, whatever comes first. + * </p> + */ +public interface GLFBODrawable extends GLDrawable { + // public enum DoubleBufferMode { NONE, TEXTURE, FBO }; // TODO: Add or remove TEXTURE (only) DoubleBufferMode support + + /** + * @return <code>true</code> if initialized, i.e. a {@link GLContext} is bound and made current once, otherwise <code>false</code>. + */ + public boolean isInitialized(); + + /** + * Notify this instance about upstream size change + * to reconfigure the {@link FBObject}. + * @param gl GL context object bound to this drawable, will be made current during operation. + * A prev. current context will be make current after operation. + * @throws GLException if resize operation failed + */ + void resetSize(GL gl) throws GLException; + + /** + * @return the used texture unit + */ + int getTextureUnit(); + + /** + * + * @param unit the texture unit to be used + */ + void setTextureUnit(int unit); + + /** + * Set the number of sample buffers if using MSAA + * + * @param gl GL context object bound to this drawable, will be made current during operation. + * A prev. current context will be make current after operation. + * @param newSamples new sample size + * @throws GLException if resetting the FBO failed + */ + void setNumSamples(GL gl, int newSamples) throws GLException; + + /** + * @return the number of sample buffers if using MSAA, otherwise 0 + */ + int getNumSamples(); + + /** + * Sets the number of buffers (FBO) being used if using {@link GLCapabilities#getDoubleBuffered() double buffering}. + * <p> + * If {@link GLCapabilities#getDoubleBuffered() double buffering} is not chosen, this is a NOP. + * </p> + * <p> + * Must be called before {@link #isInitialized() initialization}, otherwise an exception is thrown. + * </p> + * @return the new number of buffers (FBO) used, maybe different than the requested <code>bufferCount</code> (see above) + * @throws GLException if already initialized, see {@link #isInitialized()}. + */ + int setNumBuffers(int bufferCount) throws GLException; + + /** + * @return the number of buffers (FBO) being used. 1 if not using {@link GLCapabilities#getDoubleBuffered() double buffering}, + * otherwise ≥ 2, depending on {@link #setNumBuffers(int)}. + */ + int getNumBuffers(); + + /** + * @return the used {@link DoubleBufferMode} + */ + // DoubleBufferMode getDoubleBufferMode(); // TODO: Add or remove TEXTURE (only) DoubleBufferMode support + + /** + * Sets the {@link DoubleBufferMode}. Must be called before {@link #isInitialized() initialization}, + * otherwise an exception is thrown. + * <p> + * This call has no effect is MSAA is selected, since MSAA always forces the mode to {@link DoubleBufferMode#FBO FBO}. + * Also setting the mode to {@link DoubleBufferMode#NONE NONE} where double buffering is {@link GLCapabilitiesImmutable#getDoubleBuffered() requested} + * or setting a double buffering mode w/o {@link GLCapabilitiesImmutable#getDoubleBuffered() request} will be ignored. + * </p> + * <p> + * Since {@link DoubleBufferMode#TEXTURE TEXTURE} mode is currently not implemented, this method has no effect. + * </p> + * @throws GLException if already initialized, see {@link #isInitialized()}. + */ + // void setDoubleBufferMode(DoubleBufferMode mode) throws GLException; // TODO: Add or remove TEXTURE (only) DoubleBufferMode support + + /** + * If MSAA is being used and {@link GL#GL_FRONT} is requested, + * the internal {@link FBObject} {@link FBObject#getSamplingSinkFBO() sample sink} is being returned. + * + * @param bufferName {@link GL#GL_FRONT} and {@link GL#GL_BACK} are valid buffer names + * @return the named {@link FBObject} + * @throws IllegalArgumentException if an illegal buffer name is being used + */ + FBObject getFBObject(int bufferName) throws IllegalArgumentException; + + /** + * Returns the named texture buffer. + * <p> + * If MSAA is being used, only the {@link GL#GL_FRONT} buffer is accessible + * and an exception is being thrown if {@link GL#GL_BACK} is being requested. + * </p> + * @param bufferName {@link GL#GL_FRONT} and {@link GL#GL_BACK} are valid buffer names + * @return the named {@link TextureAttachment} + * @throws IllegalArgumentException if using MSAA and {@link GL#GL_BACK} is requested or an illegal buffer name is being used + */ + FBObject.TextureAttachment getTextureBuffer(int bufferName) throws IllegalArgumentException; + + /** Resizeable {@link GLFBODrawable} specialization */ + public interface Resizeable extends GLFBODrawable { + /** + * Resize this drawable. + * <p> + * This drawable is being locked during operation. + * </p> + * @param context the {@link GLContext} bound to this drawable, will be made current during operation + * A prev. current context will be make current after operation. + * @param newWidth + * @param newHeight + * @throws NativeWindowException in case the surface could no be locked + * @throws GLException in case an error during the resize operation occurred + */ + void setSize(GLContext context, int newWidth, int newHeight) throws NativeWindowException, GLException; + } +} |