/*
* Copyright (c) 2002-2008 LWJGL Project
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*
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* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
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*
* * 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.
*
* * Neither the name of 'LWJGL' nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT OWNER OR
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*/
package org.lwjgl.opengl;
/**
* This class describes pixel format properties for an OpenGL context. Instances
* of this class is used as arguments to Display.create(), Pbuffer.create() and
* AWTGLCanvas, to indicate minimum required properties.
* <p/>
* Instants of this class are immutable. An example of the expected way to set
* the PixelFormat property values is the following:
* <code>PixelFormat pf = new PixelFormat().withDepthBits(24).withSamples(4).withSRGB(true);</code>
* <p/>
* WARNING: Some pixel formats are known to cause troubles on certain buggy drivers.
* Example: Under Windows, specifying samples != 0 will enable the ARB
* pixel format selection path, which could trigger a crash.
*
* @author elias_naur@sourceforge.net
* @version $Revision$
*/
public final class PixelFormat implements PixelFormatLWJGL {
/**
* The number of bits per pixel, exluding alpha.
* This parameter is ignored in Display.create().
*/
private int bpp;
/** The number of alpha bits. */
private int alpha;
/** The number of depth buffer bits */
private int depth;
/** The number of stencil bits */
private int stencil;
/**
* The number of samples to use in anti-aliasing.
* 0 means that anti-aliasing is disabled.
*/
private int samples;
/**
* The number of COLOR_SAMPLES_NV to use for Coverage Sample Anti-aliasing (CSAA).
* When this number is greater than 0, the {@code samples} property will be treated
* as if it were the COVERAGE_SAMPLES_NV property.
* <p/>
* This property is currently a no-op for the MacOS implementation.
*/
private int colorSamples;
/** The number of auxiliary buffers */
private int num_aux_buffers;
/** The number of bits per pixel in the accumulation buffer */
private int accum_bpp;
/** The number of alpha bits in the accumulation buffer */
private int accum_alpha;
/** Whether this format requires a stereo buffer */
private boolean stereo;
/** Whether this format specifies a floating point format */
private boolean floating_point;
/**
* Whether this format specifies a packed floating point format (32 bit unsigned - R11F_G11F_B10F)
* This property is currently a no-op for the MacOS implementation.
*/
private boolean floating_point_packed;
/**
* Whether this format specifies an sRGB format
* This property is currently a no-op for the MacOS implementation.
*/
private boolean sRGB;
/**
* Default pixel format is minimum 8 bits depth, and no alpha
* nor stencil requirements.
*/
public PixelFormat() {
this(0, 8, 0);
}
public PixelFormat(int alpha, int depth, int stencil) {
this(alpha, depth, stencil, 0);
}
public PixelFormat(int alpha, int depth, int stencil, int samples) {
this(0, alpha, depth, stencil, samples);
}
public PixelFormat(int bpp, int alpha, int depth, int stencil, int samples) {
this(bpp, alpha, depth, stencil, samples, 0, 0, 0, false);
}
public PixelFormat(int bpp, int alpha, int depth, int stencil, int samples, int num_aux_buffers, int accum_bpp, int accum_alpha, boolean stereo) {
this(bpp, alpha, depth, stencil, samples, num_aux_buffers, accum_bpp, accum_alpha, stereo, false);
}
public PixelFormat(int bpp, int alpha, int depth, int stencil, int samples, int num_aux_buffers, int accum_bpp, int accum_alpha, boolean stereo, boolean floating_point) {
this.bpp = bpp;
this.alpha = alpha;
this.depth = depth;
this.stencil = stencil;
this.samples = samples;
this.num_aux_buffers = num_aux_buffers;
this.accum_bpp = accum_bpp;
this.accum_alpha = accum_alpha;
this.stereo = stereo;
this.floating_point = floating_point;
this.floating_point_packed = false;
this.sRGB = false;
}
private PixelFormat(final PixelFormat pf) {
this.bpp = pf.bpp;
this.alpha = pf.alpha;
this.depth = pf.depth;
this.stencil = pf.stencil;
this.samples = pf.samples;
this.colorSamples = pf.colorSamples;
this.num_aux_buffers = pf.num_aux_buffers;
this.accum_bpp = pf.accum_bpp;
this.accum_alpha = pf.accum_alpha;
this.stereo = pf.stereo;
this.floating_point = pf.floating_point;
this.floating_point_packed = pf.floating_point_packed;
this.sRGB = pf.sRGB;
}
public int getBitsPerPixel() {
return bpp;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new bits per pixel value.
*
* @param bpp the new bits per pixel value.
*
* @return the new PixelFormat
*/
public PixelFormat withBitsPerPixel(final int bpp) {
if ( bpp < 0 )
throw new IllegalArgumentException("Invalid number of bits per pixel specified: " + bpp);
final PixelFormat pf = new PixelFormat(this);
pf.bpp = bpp;
return pf;
}
public int getAlphaBits() {
return alpha;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new alpha bits value.
*
* @param alpha the new alpha bits value.
*
* @return the new PixelFormat
*/
public PixelFormat withAlphaBits(final int alpha) {
if ( alpha < 0 )
throw new IllegalArgumentException("Invalid number of alpha bits specified: " + alpha);
final PixelFormat pf = new PixelFormat(this);
pf.alpha = alpha;
return pf;
}
public int getDepthBits() {
return depth;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new depth bits value.
*
* @param depth the new depth bits value.
*
* @return the new PixelFormat
*/
public PixelFormat withDepthBits(final int depth) {
if ( depth < 0 )
throw new IllegalArgumentException("Invalid number of depth bits specified: " + depth);
final PixelFormat pf = new PixelFormat(this);
pf.depth = depth;
return pf;
}
public int getStencilBits() {
return stencil;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new stencil bits value.
*
* @param stencil the new stencil bits value.
*
* @return the new PixelFormat
*/
public PixelFormat withStencilBits(final int stencil) {
if ( stencil < 0 )
throw new IllegalArgumentException("Invalid number of stencil bits specified: " + stencil);
final PixelFormat pf = new PixelFormat(this);
pf.stencil = stencil;
return pf;
}
public int getSamples() {
return samples;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new samples value.
*
* @param samples the new samples value.
*
* @return the new PixelFormat
*/
public PixelFormat withSamples(final int samples) {
if ( samples < 0 )
throw new IllegalArgumentException("Invalid number of samples specified: " + samples);
final PixelFormat pf = new PixelFormat(this);
pf.samples = samples;
return pf;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new color samples values.
* A value greater than 0 is valid only if the {@code samples} property is also greater than 0. Additionally, the
* color samples value needs to be lower than or equal to the {@code samples} property.
*
* @param colorSamples the new color samples value.
*
* @return the new PixelFormat
*/
public PixelFormat withCoverageSamples(final int colorSamples) {
return withCoverageSamples(colorSamples, samples);
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new color samples
* and coverage samples values.
*
* @param colorSamples the new color samples value. This value must be lower than or equal to the coverage samples value.
* @param coverageSamples the new coverage samples value.
*
* @return the new PixelFormat
*/
public PixelFormat withCoverageSamples(final int colorSamples, final int coverageSamples) {
if ( coverageSamples < 0 || colorSamples < 0 || (coverageSamples == 0 && 0 < colorSamples) || coverageSamples < colorSamples )
throw new IllegalArgumentException("Invalid number of coverage samples specified: " + coverageSamples + " - " + colorSamples);
final PixelFormat pf = new PixelFormat(this);
pf.samples = coverageSamples;
pf.colorSamples = colorSamples;
return pf;
}
public int getAuxBuffers() {
return num_aux_buffers;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new auxiliary buffers value.
*
* @param num_aux_buffers the new auxiliary buffers value.
*
* @return the new PixelFormat
*/
public PixelFormat withAuxBuffers(final int num_aux_buffers) {
if ( num_aux_buffers < 0 )
throw new IllegalArgumentException("Invalid number of auxiliary buffers specified: " + num_aux_buffers);
final PixelFormat pf = new PixelFormat(this);
pf.num_aux_buffers = num_aux_buffers;
return pf;
}
public int getAccumulationBitsPerPixel() {
return accum_bpp;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new bits per pixel in the accumulation buffer value.
*
* @param accum_bpp the new bits per pixel in the accumulation buffer value.
*
* @return the new PixelFormat
*/
public PixelFormat withAccumulationBitsPerPixel(final int accum_bpp) {
if ( accum_bpp < 0 )
throw new IllegalArgumentException("Invalid number of bits per pixel in the accumulation buffer specified: " + accum_bpp);
final PixelFormat pf = new PixelFormat(this);
pf.accum_bpp = accum_bpp;
return pf;
}
public int getAccumulationAlpha() {
return accum_alpha;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new alpha bits in the accumulation buffer value.
*
* @param accum_alpha the new alpha bits in the accumulation buffer value.
*
* @return the new PixelFormat
*/
public PixelFormat withAccumulationAlpha(final int accum_alpha) {
if ( accum_alpha < 0 )
throw new IllegalArgumentException("Invalid number of alpha bits in the accumulation buffer specified: " + accum_alpha);
final PixelFormat pf = new PixelFormat(this);
pf.accum_alpha = accum_alpha;
return pf;
}
public boolean isStereo() {
return stereo;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new stereo value.
*
* @param stereo the new stereo value.
*
* @return the new PixelFormat
*/
public PixelFormat withStereo(final boolean stereo) {
final PixelFormat pf = new PixelFormat(this);
pf.stereo = stereo;
return pf;
}
public boolean isFloatingPoint() {
return floating_point;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new floating point value.
* If floating_point is true, floating_point_packed will be reset to false.
*
* @param floating_point the new floating point value.
*
* @return the new PixelFormat
*/
public PixelFormat withFloatingPoint(final boolean floating_point) {
final PixelFormat pf = new PixelFormat(this);
pf.floating_point = floating_point;
if ( floating_point )
pf.floating_point_packed = false;
return pf;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new packed floating point value.
* If floating_point_packed is true, floating_point will be reset to false.
*
* @param floating_point_packed the new packed floating point value.
*
* @return the new PixelFormat
*/
public PixelFormat withFloatingPointPacked(final boolean floating_point_packed) {
final PixelFormat pf = new PixelFormat(this);
pf.floating_point_packed = floating_point_packed;
if ( floating_point_packed )
pf.floating_point = false;
return pf;
}
public boolean isSRGB() {
return sRGB;
}
/**
* Returns a new PixelFormat object with the same properties as this PixelFormat and the new sRGB value.
*
* @param sRGB the new floating point value.
*
* @return the new PixelFormat
*/
public PixelFormat withSRGB(final boolean sRGB) {
final PixelFormat pf = new PixelFormat(this);
pf.sRGB = sRGB;
return pf;
}
}