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Java™ Binding for the OpenGL® API
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/**
* Copyright 2013 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 com.jogamp.opengl.util;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import com.jogamp.nativewindow.util.PixelFormat;
import com.jogamp.opengl.GL;
import com.jogamp.opengl.GL2ES2;
import com.jogamp.opengl.GL2ES3;
import com.jogamp.opengl.GL2GL3;
import com.jogamp.opengl.GLContext;
import com.jogamp.opengl.GLException;
import com.jogamp.opengl.GLProfile;
import com.jogamp.common.nio.Buffers;
import com.jogamp.opengl.util.texture.TextureData;
/**
* OpenGL pixel data buffer, allowing user to provide buffers via their {@link GLPixelBufferProvider} implementation.
*
* {@link GLPixelBufferProvider} produces a {@link GLPixelBuffer}.
*
*
* You may use {@link #defaultProviderNoRowStride}.
*
*/
public class GLPixelBuffer {
/** Allows user to interface with another toolkit to define {@link GLPixelAttributes} and memory buffer to produce {@link TextureData}. */
public static interface GLPixelBufferProvider {
/** Allow {@link GL2ES3#GL_PACK_ROW_LENGTH}, or {@link GL2ES2#GL_UNPACK_ROW_LENGTH}. */
boolean getAllowRowStride();
/**
* Returns RGB[A] {@link GLPixelAttributes} matching {@link GL}, {@code componentCount} and {@code pack}.
*
* @param gl the corresponding current {@link GL} context object
* @param componentCount RGBA component count, i.e. 1 (luminance, alpha or red), 3 (RGB) or 4 (RGBA)
* @param pack {@code true} for read mode GPU -> CPU, e.g. {@link GL#glReadPixels(int, int, int, int, int, int, Buffer) glReadPixels}.
* {@code false} for write mode CPU -> GPU, e.g. {@link GL#glTexImage2D(int, int, int, int, int, int, int, int, Buffer) glTexImage2D}.
*/
GLPixelAttributes getAttributes(GL gl, int componentCount, boolean pack);
/**
* Returns the host {@link PixelFormat.Composition} matching {@link GL} and {@code componentCount}
* if required by implementation, otherwise {@code null}.
*
* @param glp the corresponding current {@link GL} context object
* @param componentCount RGBA component count, i.e. 1 (luminance, alpha or red), 3 (RGB) or 4 (RGBA)
*/
PixelFormat.Composition getHostPixelComp(final GLProfile glp, final int componentCount);
/**
* Allocates a new {@link GLPixelBuffer} object.
*
* The minimum required {@link Buffer#remaining() remaining} byte size equals to minByteSize, if > 0,
* otherwise utilize {@link GLBuffers#sizeof(GL, int[], int, int, int, int, int, boolean)}
* to calculate it.
*
*
* @param gl the corresponding current {@link GL} context object
* @param hostPixComp host {@link PixelFormat pixel format}, i.e. of the source or sink depending on {@code pack},
* e.g. fetched via {@link #getHostPixelComp(GLProfile, int)}.
* If {@code null}, {@code pixelAttributes} instance maybe used or an exception is thrown,
* depending on implementation semantics.
* @param pixelAttributes the desired {@link GLPixelAttributes}, e.g. fetched via {@link #getAttributes(GL, int, boolean)}
* @param pack {@code true} for read mode GPU -> CPU, e.g. {@link GL#glReadPixels(int, int, int, int, int, int, Buffer) glReadPixels}.
* {@code false} for write mode CPU -> GPU, e.g. {@link GL#glTexImage2D(int, int, int, int, int, int, int, int, Buffer) glTexImage2D}.
* @param width in pixels
* @param height in pixels
* @param depth in pixels
* @param minByteSize if > 0, the pre-calculated minimum byte-size for the resulting buffer, otherwise ignore.
* @see #getHostPixelComp(GLProfile, int)
* @see #getAttributes(GL, int, boolean)
*/
GLPixelBuffer allocate(GL gl, PixelFormat.Composition hostPixComp, GLPixelAttributes pixelAttributes,
boolean pack, int width, int height, int depth, int minByteSize);
}
/** Single {@link GLPixelBuffer} provider. */
public static interface SingletonGLPixelBufferProvider extends GLPixelBufferProvider {
/**
* {@inheritDoc}
*
* Being called to gather the initial {@link GLPixelBuffer},
* or a new replacement {@link GLPixelBuffer} if {@link GLPixelBuffer#requiresNewBuffer(GL, int, int, int)}.
*
*/
@Override
GLPixelBuffer allocate(GL gl, PixelFormat.Composition hostPixComp, GLPixelAttributes pixelAttributes,
boolean pack, int width, int height, int depth, int minByteSize);
/**
* Return the last {@link #allocate(GL, PixelFormat.Composition, GLPixelAttributes, boolean, int, int, int, int) allocated} {@link GLPixelBuffer}
* matching the given parameter.
*
* May return {@code null} if none has been allocated yet.
*
*
* Returned {@link GLPixelBuffer} may be {@link GLPixelBuffer#isValid() invalid}.
*
* @param hostPixComp host {@link PixelFormat pixel format}, i.e. of the source or sink depending on {@code pack},
* e.g. fetched via {@link #getHostPixelComp(GLProfile, int)}.
* If {@code null}, {@code pixelAttributes} instance maybe used or an exception is thrown,
* depending on implementation semantics.
* @param pixelAttributes the desired {@link GLPixelAttributes}, e.g. fetched via {@link #getAttributes(GL, int, boolean)}
* @param pack {@code true} for read mode GPU -> CPU, e.g. {@link GL#glReadPixels(int, int, int, int, int, int, Buffer) glReadPixels}.
* {@code false} for write mode CPU -> GPU, e.g. {@link GL#glTexImage2D(int, int, int, int, int, int, int, int, Buffer) glTexImage2D}.
*/
GLPixelBuffer getSingleBuffer(PixelFormat.Composition hostPixelComp, GLPixelAttributes pixelAttributes, boolean pack);
/**
* Initializes the single {@link GLPixelBuffer} w/ a given size,
* if not yet {@link #allocate(GL, PixelFormat.Composition, GLPixelAttributes, boolean, int, int, int, int) allocated}.
*
* @param glp
* @param componentCount RGBA component count, i.e. 1 (luminance, alpha or red), 3 (RGB) or 4 (RGBA)
* @param pack {@code true} for read mode GPU -> CPU, e.g. {@link GL#glReadPixels(int, int, int, int, int, int, Buffer) glReadPixels}.
* {@code false} for write mode CPU -> GPU, e.g. {@link GL#glTexImage2D(int, int, int, int, int, int, int, int, Buffer) glTexImage2D}.
* @param width
* @param height
* @param depth
* @return the newly initialized single {@link GLPixelBuffer}, or null if already allocated.
*/
GLPixelBuffer initSingleton(GLProfile glp, int componentCount, boolean pack, int width, int height, int depth);
/** Dispose all resources.*/
void dispose();
}
public static class DefaultGLPixelBufferProvider implements GLPixelBufferProvider {
private final boolean allowRowStride;
/**
* @param allowRowStride If true, allow row-stride, otherwise not.
* See {@link #getAllowRowStride()} and {@link GLPixelBuffer#requiresNewBuffer(GL, int, int, int)}.
*/
public DefaultGLPixelBufferProvider(final boolean allowRowStride) {
this.allowRowStride = allowRowStride;
}
@Override
public boolean getAllowRowStride() { return allowRowStride; }
@Override
public GLPixelAttributes getAttributes(final GL gl, final int componentCount, final boolean pack) {
final GLPixelAttributes res = GLPixelAttributes.convert(gl, componentCount, pack);
if( null == res ) {
throw new GLException("Unsupported componentCount "+componentCount+", contact maintainer to enhance");
} else {
return res;
}
}
/**
* {@inheritDoc}
*
* Returns {@code null}!
*
*/
@Override
public PixelFormat.Composition getHostPixelComp(final GLProfile glp, final int componentCount) {
return null;
}
/**
* {@inheritDoc}
*
* Returns an NIO {@link ByteBuffer}.
*
*/
@Override
public GLPixelBuffer allocate(final GL gl, final PixelFormat.Composition hostPixComp, final GLPixelAttributes pixelAttributes,
final boolean pack, final int width, final int height, final int depth, final int minByteSize) {
// unused: hostPixComp
if( minByteSize > 0 ) {
return new GLPixelBuffer(pixelAttributes, pack, width, height, depth, Buffers.newDirectByteBuffer(minByteSize), getAllowRowStride());
} else {
final int[] tmp = { 0 };
final int byteSize = GLBuffers.sizeof(gl, tmp, pixelAttributes.pfmt.comp.bytesPerPixel(), width, height, depth, pack);
return new GLPixelBuffer(pixelAttributes, pack, width, height, depth, Buffers.newDirectByteBuffer(byteSize), getAllowRowStride());
}
}
}
/**
* Default {@link GLPixelBufferProvider} with {@link GLPixelBufferProvider#getAllowRowStride()} == false,
* utilizing best match for {@link GLPixelAttributes}
* and {@link GLPixelBufferProvider#allocate(GL, PixelFormat.Composition, GLPixelAttributes, boolean, int, int, int, int) allocating} a {@link ByteBuffer}.
*/
public static final GLPixelBufferProvider defaultProviderNoRowStride = new DefaultGLPixelBufferProvider(false);
/**
* Default {@link GLPixelBufferProvider} with {@link GLPixelBufferProvider#getAllowRowStride()} == true,
* utilizing best match for {@link GLPixelAttributes}
* and {@link GLPixelBufferProvider#allocate(GL, PixelFormat.Composition, GLPixelAttributes, boolean, int, int, int, int) allocating} a {@link ByteBuffer}.
*/
public static final GLPixelBufferProvider defaultProviderWithRowStride = new DefaultGLPixelBufferProvider(true);
/** Pixel attributes. */
public static class GLPixelAttributes {
/** Undefined instance of {@link GLPixelAttributes}, having componentCount:=0, format:=0 and type:= 0. */
public static final GLPixelAttributes UNDEF = new GLPixelAttributes(null, PixelFormat.LUMINANCE, 0, 0, true, false);
/**
* Returns the matching {@link PixelFormat} for the given GL format and type if exists,
* otherwise returns null.
*/
public static final PixelFormat getPixelFormat(final int glFormat, final int glDataType) {
PixelFormat pixFmt = null;
switch(glFormat) {
case GL.GL_ALPHA:
case GL.GL_LUMINANCE:
case GL2ES2.GL_RED:
pixFmt = PixelFormat.LUMINANCE;
break;
case GL.GL_RGB:
switch(glDataType) {
case GL2GL3.GL_UNSIGNED_SHORT_5_6_5_REV:
pixFmt = PixelFormat.RGB565;
break;
case GL.GL_UNSIGNED_SHORT_5_6_5:
pixFmt = PixelFormat.BGR565;
break;
case GL.GL_UNSIGNED_BYTE:
pixFmt = PixelFormat.RGB888;
break;
}
break;
case GL.GL_RGBA:
switch(glDataType) {
case GL2GL3.GL_UNSIGNED_SHORT_1_5_5_5_REV:
pixFmt = PixelFormat.RGBA5551;
break;
case GL.GL_UNSIGNED_SHORT_5_5_5_1:
pixFmt = PixelFormat.ABGR1555;
break;
case GL2GL3.GL_UNSIGNED_INT_8_8_8_8_REV:
// fall through intended
case GL.GL_UNSIGNED_BYTE:
pixFmt = PixelFormat.RGBA8888;
break;
case GL2GL3.GL_UNSIGNED_INT_8_8_8_8:
pixFmt = PixelFormat.ABGR8888;
break;
}
break;
case GL.GL_BGR:
if( GL.GL_UNSIGNED_BYTE == glDataType ) {
pixFmt = PixelFormat.BGR888;
}
break;
case GL.GL_BGRA:
switch(glDataType) {
case GL2GL3.GL_UNSIGNED_INT_8_8_8_8:
pixFmt = PixelFormat.ARGB8888;
break;
case GL2GL3.GL_UNSIGNED_INT_8_8_8_8_REV:
// fall through intended
case GL.GL_UNSIGNED_BYTE:
pixFmt = PixelFormat.BGRA8888;
break;
}
break;
}
return pixFmt;
}
/**
* Returns the matching {@link GLPixelAttributes} for the given byte sized RGBA {@code componentCount} and {@link GL} if exists,
* otherwise returns {@code null}.
*
* @param gl the corresponding current {@link GL} context object
* @param componentCount RGBA component count, i.e. 1 (luminance, alpha or red), 3 (RGB) or 4 (RGBA)
* @param pack {@code true} for read mode GPU -> CPU, e.g. {@link GL#glReadPixels(int, int, int, int, int, int, Buffer) glReadPixels}.
* {@code false} for write mode CPU -> GPU, e.g. {@link GL#glTexImage2D(int, int, int, int, int, int, int, int, Buffer) glTexImage2D}.
*/
public static GLPixelAttributes convert(final GL gl, final int componentCount, final boolean pack) {
final int dFormat, dType;
final boolean glesReadMode = pack && gl.isGLES();
if( 1 == componentCount && !glesReadMode ) {
if( gl.isGL3ES3() ) {
// RED is supported on ES3 and >= GL3 [core]; ALPHA is deprecated on core
dFormat = GL2ES2.GL_RED;
} else {
// ALPHA is supported on ES2 and GL2, i.e. <= GL3 [core] or compatibility
dFormat = GL.GL_ALPHA;
}
dType = GL.GL_UNSIGNED_BYTE;
} else if( 3 == componentCount && !glesReadMode ) {
dFormat = GL.GL_RGB;
dType = GL.GL_UNSIGNED_BYTE;
} else if( 4 == componentCount || glesReadMode ) {
final GLContext ctx = gl.getContext();
final int _dFormat = ctx.getDefaultPixelDataFormat();
final int dComps = GLBuffers.componentCount(_dFormat);
if( dComps == componentCount || 4 == dComps ) { // accept if desired component count or 4 components
dFormat = _dFormat;
dType = ctx.getDefaultPixelDataType();
} else {
dFormat = GL.GL_RGBA;
dType = GL.GL_UNSIGNED_BYTE;
}
} else {
return null;
}
return new GLPixelAttributes(dFormat, dType);
}
/**
* Returns the matching {@link GLPixelAttributes} for the given {@link GLProfile}, {@link PixelFormat} and {@code pack} if exists,
* otherwise returns {@code null}.
* @param glp the corresponding {@link GLProfile}
* @param pixFmt the to be matched {@link PixelFormat pixel format}
* @param pack {@code true} for read mode GPU -> CPU, e.g. {@link GL#glReadPixels(int, int, int, int, int, int, Buffer) glReadPixels}.
* {@code false} for write mode CPU -> GPU, e.g. {@link GL#glTexImage2D(int, int, int, int, int, int, int, int, Buffer) glTexImage2D}.
*/
public static final GLPixelAttributes convert(final GLProfile glp, final PixelFormat pixFmt, final boolean pack) {
final int[] df = new int[1];
final int[] dt = new int[1];
convert(glp, pixFmt, pack, df, dt);
if( 0 != df[0] ) {
return new GLPixelAttributes(null, pixFmt, df[0], dt[0], true /* not used */, true);
}
return null;
}
private static final int convert(final GLProfile glp, final PixelFormat pixFmt, final boolean pack,
final int[] dfRes, final int[] dtRes) {
final boolean glesReadMode = pack && glp.isGLES();
int df = 0; // format
int dt = GL.GL_UNSIGNED_BYTE; // data type
switch(pixFmt) {
case LUMINANCE:
if( !glesReadMode ) {
if( glp.isGL3ES3() ) {
// RED is supported on ES3 and >= GL3 [core]; ALPHA/LUMINANCE is deprecated on core
df = GL2ES2.GL_RED;
} else {
// ALPHA/LUMINANCE is supported on ES2 and GL2, i.e. <= GL3 [core] or compatibility
df = GL.GL_LUMINANCE;
}
}
break;
case RGB565:
if( glp.isGL2GL3() ) {
df = GL.GL_RGB; dt = GL2GL3.GL_UNSIGNED_SHORT_5_6_5_REV;
}
break;
case BGR565:
if( glp.isGL2GL3() ) {
df = GL.GL_RGB; dt = GL.GL_UNSIGNED_SHORT_5_6_5;
}
break;
case RGBA5551:
if( glp.isGL2GL3() ) {
df = GL.GL_RGBA; dt = GL2GL3.GL_UNSIGNED_SHORT_1_5_5_5_REV;
}
break;
case ABGR1555:
if( glp.isGL2GL3() ) {
df = GL.GL_RGBA; dt = GL.GL_UNSIGNED_SHORT_5_5_5_1;
}
break;
case RGB888:
if( !glesReadMode ) {
df = GL.GL_RGB;
}
break;
case BGR888:
if( glp.isGL2GL3() ) {
df = GL.GL_BGR;
}
break;
case RGBx8888:
case RGBA8888:
df = GL.GL_RGBA;
break;
case ABGR8888:
if( glp.isGL2GL3() ) {
df = GL.GL_RGBA; dt = GL2GL3.GL_UNSIGNED_INT_8_8_8_8;
}
break;
case ARGB8888:
if( glp.isGL2GL3() ) {
df = GL.GL_BGRA; dt = GL2GL3.GL_UNSIGNED_INT_8_8_8_8;
}
break;
case BGRx8888:
case BGRA8888:
if( glp.isGL2GL3() ) { // FIXME: or if( !glesReadMode ) ? BGRA n/a on GLES
df = GL.GL_BGRA;
}
break;
}
dfRes[0] = df;
dtRes[0] = dt;
return df;
}
/** The OpenGL pixel data format */
public final int format;
/** The OpenGL pixel data type */
public final int type;
/** {@link PixelFormat} describing the {@link PixelFormat.Composition component} layout */
public final PixelFormat pfmt;
@Override
public final int hashCode() {
// 31 * x == (x << 5) - x
int hash = pfmt.hashCode();
hash = ((hash << 5) - hash) + format;
return ((hash << 5) - hash) + type;
}
@Override
public final boolean equals(final Object obj) {
if(this == obj) { return true; }
if( obj instanceof GLPixelAttributes ) {
final GLPixelAttributes other = (GLPixelAttributes) obj;
return format == other.format &&
type == other.type &&
pfmt.equals(other.pfmt);
} else {
return false;
}
}
/**
* Create a new {@link GLPixelAttributes} instance based on GL format and type.
* @param dataFormat GL data format
* @param dataType GL data type
* @throws GLException if {@link PixelFormat} could not be determined, see {@link #getPixelFormat(int, int)}.
*/
public GLPixelAttributes(final int dataFormat, final int dataType) throws GLException {
this(null, null, dataFormat, dataType, true /* not used */, true);
}
/**
* Create a new {@link GLPixelAttributes} instance based on {@link GLProfile}, {@link PixelFormat} and {@code pack}.
* @param glp the corresponding {@link GLProfile}
* @param pixFmt the to be matched {@link PixelFormat pixel format}
* @param pack {@code true} for read mode GPU -> CPU, e.g. {@link GL#glReadPixels(int, int, int, int, int, int, Buffer) glReadPixels}.
* {@code false} for write mode CPU -> GPU, e.g. {@link GL#glTexImage2D(int, int, int, int, int, int, int, int, Buffer) glTexImage2D}.
* @throws GLException if GL format or type could not be determined, see {@link #convert(GLProfile, PixelFormat, boolean)}.
*/
public GLPixelAttributes(final GLProfile glp, final PixelFormat pixFmt, final boolean pack) throws GLException {
this(glp, pixFmt, 0, 0, pack, true);
}
private GLPixelAttributes(final GLProfile glp, final PixelFormat pixFmt,
final int dataFormat, final int dataType, final boolean pack, final boolean checkArgs) throws GLException {
if( checkArgs && ( 0 == dataFormat || 0 == dataType ) ) {
if( null == pixFmt || null == glp ) {
throw new GLException("Zero format and/or type w/o pixFmt or glp: "+this);
}
final int[] df = new int[1];
final int[] dt = new int[1];
if( 0 == convert(glp, pixFmt, pack, df, dt) ) {
throw new GLException("Could not find format and type for "+pixFmt+" and "+glp+", "+this);
}
this.format = df[0];
this.type = dt[0];
this.pfmt = pixFmt;
} else {
this.format = dataFormat;
this.type = dataType;
this.pfmt = null != pixFmt ? pixFmt : getPixelFormat(dataFormat, dataType);
if( null == this.pfmt ) {
throw new GLException("Could not find PixelFormat for format and/or type: "+this);
}
}
if( checkArgs ) {
final int bytesPerPixel = GLBuffers.bytesPerPixel(this.format, this.type);
if( 0 == bytesPerPixel ) {
throw new GLException("Zero bytesPerPixel: "+this);
}
}
}
@Override
public String toString() {
return "PixelAttributes[fmt 0x"+Integer.toHexString(format)+", type 0x"+Integer.toHexString(type)+", "+pfmt+"]";
}
}
/** The {@link GLPixelAttributes}. */
public final GLPixelAttributes pixelAttributes;
/**
* Width in pixels, representing {@link #buffer}'s {@link #byteSize}.
*
* May not represent actual image width as user may re-use buffer for different dimensions, see {@link #requiresNewBuffer(GL, int, int, int)}.
*
*/
public final int width;
/**
* Height in pixels, representing {@link #buffer}'s {@link #byteSize}.
*
* May not represent actual image height as user may re-use buffer for different dimensions, see {@link #requiresNewBuffer(GL, int, int, int)}.
*
*/
public final int height;
/** Depth in pixels. */
public final int depth;
/**
* Data packing direction.
* {@code true} for read mode GPU -> CPU, e.g. {@link GL#glReadPixels(int, int, int, int, int, int, Buffer) glReadPixels}.
* {@code false} for write mode CPU -> GPU, e.g. {@link GL#glTexImage2D(int, int, int, int, int, int, int, int, Buffer) glTexImage2D}.
*/
public final boolean pack;
/** Byte size of the buffer. Actually the number of {@link Buffer#remaining()} bytes when passed in ctor. */
public final int byteSize;
/**
* Buffer holding the pixel data. If {@link #rewind()}, it holds byteSize {@link Buffer#remaining()} bytes.
*
* By default the {@link Buffer} is a {@link ByteBuffer}, due to {@link DefProvider#allocate(GL, PixelFormat.Composition, GLPixelAttributes, boolean, int, int, int, int)}.
* However, other {@link GLPixelBufferProvider} may utilize different {@link Buffer} types.
*
*/
public final Buffer buffer;
/** Buffer element size in bytes. */
public final int bufferElemSize;
/** Allow {@link GL2ES3#GL_PACK_ROW_LENGTH}, or {@link GL2ES2#GL_UNPACK_ROW_LENGTH}. See {@link #requiresNewBuffer(GL, int, int, int)}. */
public final boolean allowRowStride;
private boolean disposed = false;
public StringBuilder toString(StringBuilder sb) {
if(null == sb) {
sb = new StringBuilder();
}
sb.append(pixelAttributes).append(", dim ").append(width).append("x").append(height).append("x").append(depth).append(", pack ").append(pack)
.append(", disposed ").append(disposed).append(", valid ").append(isValid())
.append(", buffer[bytes ").append(byteSize).append(", elemSize ").append(bufferElemSize).append(", ").append(buffer).append("]");
return sb;
}
@Override
public String toString() {
return "GLPixelBuffer["+toString(null).toString()+"]";
}
/**
* @param pixelAttributes the desired {@link GLPixelAttributes}
* @param pack {@code true} for read mode GPU -> CPU, e.g. {@link GL#glReadPixels(int, int, int, int, int, int, Buffer) glReadPixels}.
* {@code false} for write mode CPU -> GPU, e.g. {@link GL#glTexImage2D(int, int, int, int, int, int, int, int, Buffer) glTexImage2D}.
* @param width in pixels
* @param height in pixels
* @param depth in pixels
* @param buffer the backing array
* @param allowRowStride If true, allow row-stride, otherwise not. See {@link #requiresNewBuffer(GL, int, int, int)}.
* @param hostPixelComp the host {@link PixelFormat.Composition}
*/
public GLPixelBuffer(final GLPixelAttributes pixelAttributes, final boolean pack, final int width, final int height, final int depth, final Buffer buffer, final boolean allowRowStride) {
this.pixelAttributes = pixelAttributes;
this.width = width;
this.height = height;
this.depth = depth;
this.pack = pack;
this.buffer = buffer;
this.byteSize = Buffers.remainingBytes(buffer);
this.bufferElemSize = Buffers.sizeOfBufferElem(buffer);
this.allowRowStride = allowRowStride;
}
/** Allow {@link GL2ES3#GL_PACK_ROW_LENGTH}, or {@link GL2ES2#GL_UNPACK_ROW_LENGTH}. */
public final boolean getAllowRowStride() { return allowRowStride; }
/** Is not {@link #dispose() disposed} and has {@link #byteSize} > 0. */
public boolean isValid() {
return !disposed && 0 < byteSize;
}
/** See {@link Buffer#rewind()}. */
public Buffer rewind() {
return buffer.rewind();
}
/** Returns the byte position of the {@link #buffer}. */
public int position() {
return buffer.position() * bufferElemSize;
}
/** Sets the byte position of the {@link #buffer}. */
public Buffer position(final int bytePos) {
return buffer.position( bytePos / bufferElemSize );
}
/** Returns the byte capacity of the {@link #buffer}. */
public int capacity() {
return buffer.capacity() * bufferElemSize;
}
/** Returns the byte limit of the {@link #buffer}. */
public int limit() {
return buffer.limit() * bufferElemSize;
}
/** See {@link Buffer#flip()}. */
public Buffer flip() {
return buffer.flip();
}
/** See {@link Buffer#clear()}. */
public Buffer clear() {
return buffer.clear();
}
/**
* Returns true, if {@link #isValid() invalid} or implementation requires a new buffer based on the new size
* due to pixel alignment or byte size, otherwise false.
*
* It is assumed that pixelAttributes, depth and pack stays the same!
*
*
* The minimum required byte size equals to minByteSize, if > 0,
* otherwise {@link GLBuffers#sizeof(GL, int[], int, int, int, int, int, boolean) GLBuffers.sizeof(..)}
* is being used to calculate it. This value is referred to newByteSize.
*
*
* If {@link #allowRowStride} = false,
* method returns true if the newByteSize > currentByteSize
* or the newWidth != currentWidth.
*
*
* If {@link #allowRowStride} = true, see {@link GLPixelBufferProvider#getAllowRowStride()},
* method returns true only if the newByteSize > currentByteSize.
* Assuming user utilizes the row-stride when dealing w/ the data, i.e. {@link GL2ES3#GL_PACK_ROW_LENGTH}.
*
* @param gl the corresponding current GL context object
* @param newWidth new width in pixels
* @param newHeight new height in pixels
* @param newByteSize if > 0, the pre-calculated minimum byte-size for the resulting buffer, otherwise ignore.
* @see GLPixelBufferProvider#allocate(GL, PixelFormat.Composition, GLPixelAttributes, boolean, int, int, int, int)
*/
public boolean requiresNewBuffer(final GL gl, final int newWidth, final int newHeight, int newByteSize) {
if( !isValid() ) {
return true;
}
if( 0 >= newByteSize ) {
final int[] tmp = { 0 };
newByteSize = GLBuffers.sizeof(gl, tmp, pixelAttributes.pfmt.comp.bytesPerPixel(), newWidth, newHeight, 1, true);
}
if( allowRowStride ) {
return byteSize < newByteSize;
}
return byteSize < newByteSize || width != newWidth;
}
/** Dispose resources. See {@link #isValid()}. */
public void dispose() {
disposed = true;
buffer.clear();
}
}