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render-to-texture support

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Ioannis Tsakpinis 2004-03-02 01:59:32 +00:00
parent efc2ce40f0
commit d49ce2bfc0
6 changed files with 677 additions and 108 deletions
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258
src/java/org/lwjgl/opengl/Pbuffer.java
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@ -34,33 +34,124 @@ package org.lwjgl.opengl;
import org.lwjgl.Sys;
import java.nio.IntBuffer;
/**
* $Id$
*
* <p/>
* Pbuffer encapsulates an OpenGL pbuffer.
*
* Each instance of GL is only valid in the thread that creates it.
* In addition, only one instance of an OpenGL window or Pbuffer may be
* the current GL context in any one thread. To make a GL instance the
* current context, use makeCurrent().
* <p/>
* Each instance of GL is only valid in the thread that creates it. In addition, only one instance of an OpenGL window or
* Pbuffer may be the current GL context in any one thread. To make a GL instance the current context, use makeCurrent().
*
* @author elias_naur <elias_naur@users.sourceforge.net>
* @version $Revision$
*/
public final class Pbuffer {
public static final int PBUFFER_SUPPORTED = 1;
/** Current Pbuffer */
private static Pbuffer currentBuffer = null;
/**
* Indicates that Pbuffers can be created.
*/
public static final int PBUFFER_SUPPORTED = 1 << 0;
/** Handle to the native GL rendering context */
/**
* Indicates that Pbuffers can be used as render-textures.
*/
public static final int RENDER_TEXTURE_SUPPORTED = 1 << 1;
/**
* Indicates that Pbuffers can be used as non-power-of-two render-textures.
*/
public static final int RENDER_TEXTURE_RECTANGLE_SUPPORTED = 1 << 2;
/**
* Indicates that Pbuffers can be used as depth render-textures.
*/
public static final int RENDER_DEPTH_TEXTURE_SUPPORTED = 1 << 3;
/**
* The render-to-texture mipmap level attribute.
*/
public static final int MIPMAP_LEVEL = RenderTexture.WGL_MIPMAP_LEVEL_ARB;
/**
* The render-to-texture cube map face attribute.
*/
public static final int CUBE_MAP_FACE = RenderTexture.WGL_CUBE_MAP_FACE_ARB;
/**
* The render-to-texture cube map positive X face value.
*/
public static final int TEXTURE_CUBE_MAP_POSITIVE_X = RenderTexture.WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB;
/**
* The render-to-texture cube map negative X face value.
*/
public static final int TEXTURE_CUBE_MAP_NEGATIVE_X = RenderTexture.WGL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB;
/**
* The render-to-texture cube map positive Y face value.
*/
public static final int TEXTURE_CUBE_MAP_POSITIVE_Y = RenderTexture.WGL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB;
/**
* The render-to-texture cube map negative Y face value.
*/
public static final int TEXTURE_CUBE_MAP_NEGATIVE_Y = RenderTexture.WGL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB;
/**
* The render-to-texture cube map positive Z face value.
*/
public static final int TEXTURE_CUBE_MAP_POSITIVE_Z = RenderTexture.WGL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB;
/**
* The render-to-texture cube map negative Z face value.
*/
public static final int TEXTURE_CUBE_MAP_NEGATIVE_Z = RenderTexture.WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB;
/**
* The Pbuffer front left buffer.
*/
public static final int FRONT_LEFT_BUFFER = RenderTexture.WGL_FRONT_LEFT_ARB;
/**
* The Pbuffer front right buffer.
*/
public static final int FRONT_RIGHT_BUFFER = RenderTexture.WGL_FRONT_RIGHT_ARB;
/**
* The Pbuffer back left buffer.
*/
public static final int BACK_LEFT_BUFFER = RenderTexture.WGL_BACK_LEFT_ARB;
/**
* The Pbuffer back right buffer.
*/
public static final int BACK_RIGHT_BUFFER = RenderTexture.WGL_BACK_RIGHT_ARB;
/**
* The Pbuffer depth buffer.
*/
public static final int DEPTH_BUFFER = RenderTexture.WGL_DEPTH_COMPONENT_NV;
/**
* Current Pbuffer
*/
private static Pbuffer currentBuffer;
/**
* Handle to the native GL rendering context
*/
private final int handle;
/** Width */
/**
* Width
*/
private final int width;
/** Height */
/**
* Height
*/
private final int height;
static {
@ -68,37 +159,47 @@ public final class Pbuffer {
}
/**
* Construct an instance of a Pbuffer. If this fails then an Exception will be thrown.
* The buffer is single-buffered.
* Construct an instance of a Pbuffer. If this fails then an Exception will be thrown. The buffer is single-buffered.
* <p/>
* NOTE: An OpenGL window must be created before a Pbuffer can be created. The Pbuffer will have its own context that shares
* display lists and textures with the OpenGL window context, but it will have its own OpenGL state. Therefore, state changes
* to a pbuffer will not be seen in the window context and vice versa.
* <p/>
* NOTE: Some OpenGL implementations requires the shared contexts to use the same pixel format. So if possible, use the same
* bpp, alpha, depth and stencil values used to create the main window.
* <p/>
* The renderTexture parameter defines the necessary state for enabling render-to-texture. When this parameter is null,
* render-to-texture is not available. Before using render-to-texture, the Pbuffer capabilities must be queried to ensure that
* it is supported.
*
* NOTE: An OpenGL window must be created before a Pbuffer can be created. The Pbuffer will
* have its own context that shares display lists and textures with the OpenGL window context,
* but it will have its own OpenGL state. Therefore, state changes to a pbuffer will not be seen
* in the window context and vice versa.
*
* NOTE: Some OpenGL implementations requires the shared contexts to use the same pixel format.
* So if possible, use the same bpp, alpha, depth and stencil values used to create the main window.
*
* @param width Pbuffer width
* @param height Pbuffer height
* @param bpp Minimum bits per pixel
* @param alpha Minimum bits per pixel in alpha buffer
* @param depth Minimum bits per pixel in depth buffer
* @param stencil Minimum bits per pixel in stencil buffer
* @param samples Minimum samples in multisample buffer (corresponds to GL_SAMPLES_ARB in GL_ARB_multisample spec).
Pass 0 to disable multisampling. This parameter is ignored if GL_ARB_multisample is not supported.
* @param width Pbuffer width
* @param height Pbuffer height
* @param bpp Minimum bits per pixel
* @param alpha Minimum bits per pixel in alpha buffer
* @param depth Minimum bits per pixel in depth buffer
* @param stencil Minimum bits per pixel in stencil buffer
* @param samples Minimum samples in multisample buffer (corresponds to GL_SAMPLES_ARB in GL_ARB_multisample spec). Pass
* 0 to disable multisampling. This parameter is ignored if GL_ARB_multisample is not supported.
* @param renderTexture
*/
public Pbuffer(int width, int height, int bpp, int alpha, int depth, int stencil, int samples) throws Exception {
public Pbuffer(int width, int height, int bpp, int alpha, int depth, int stencil, int samples, RenderTexture renderTexture) throws Exception {
this.width = width;
this.height = height;
handle = nCreate(width, height, bpp, alpha, depth, stencil, samples);
if ( renderTexture == null )
handle = nCreate(width, height, bpp, alpha, depth, stencil, samples, null, 0, null, 0);
else
handle = nCreate(width, height,
bpp, alpha, depth, stencil,
samples,
renderTexture.pixelFormatCaps, renderTexture.pixelFormatCaps.limit(),
renderTexture.pBufferAttribs, renderTexture.pBufferAttribs.limit());
}
/**
* Method to test for validity of the buffer. If this function returns true,
* the buffer contents is lost. The buffer can still be used, but the results are undefined.
* The application is expected to release the buffer if needed, destroy it and recreate a new
* buffer.
* Method to test for validity of the buffer. If this function returns true, the buffer contents is lost. The buffer can still
* be used, but the results are undefined. The application is expected to release the buffer if needed, destroy it and recreate
* a new buffer.
*
* @return true if the buffer is lost and destroyed, false if the buffer is valid.
*/
@ -109,11 +210,10 @@ public final class Pbuffer {
/**
* Native method to test for buffer integrity
*/
private native static boolean nIsBufferLost(int handle);
private static native boolean nIsBufferLost(int handle);
/**
* Method to make the Pbuffer context current. All subsequent OpenGL
* calls will go to this buffer.
* Method to make the Pbuffer context current. All subsequent OpenGL calls will go to this buffer.
*/
public synchronized void makeCurrent() {
currentBuffer = this;
@ -124,11 +224,10 @@ public final class Pbuffer {
/**
* Native method to make a pbuffer current.
*/
private native static void nMakeCurrent(int handle);
private static native void nMakeCurrent(int handle);
/**
* Gets the Pbuffer capabilities. Only the flag PBUFFER_SUPPORTED is
* available, and indicates that Pbuffers can be created.
* Gets the Pbuffer capabilities.
*
* @return a bitmask of Pbuffer capabilities.
*/
@ -137,18 +236,15 @@ public final class Pbuffer {
/**
* Native method to create a Pbuffer
*/
private native static int nCreate(
int width,
int height,
int bpp,
int alpha,
int depth,
int stencil,
int samples) throws Exception;
private static native int nCreate(int width, int height,
int bpp, int alpha, int depth, int stencil,
int samples,
IntBuffer pixelFormatCaps, int pixelFormatCapsSize,
IntBuffer pBufferAttribs, int pBufferAttribsSize) throws Exception;
/**
* Destroys the Pbuffer. After this call, there will be no valid GL rendering context -
* regardless of whether this Pbuffer was the current rendering context or not.
* Destroys the Pbuffer. After this call, there will be no valid GL rendering context - regardless of whether this Pbuffer was
* the current rendering context or not.
*/
public synchronized void destroy() {
makeCurrent();
@ -159,21 +255,67 @@ public final class Pbuffer {
/**
* Natively destroy any GL-related stuff
*/
private native static void nDestroy(int handle);
private static native void nDestroy(int handle);
// -----------------------------------------------------------------------------------------
// ------------------------------- Render-to-Texture Methods -------------------------------
// -----------------------------------------------------------------------------------------
/**
* Sets a render-to-texture attribute.
* <p/>
* The attrib parameter can be one of MIPMAP_LEVEL and CUBE_MAP_FACE. When the attrib parameter is CUBE_MAP_FACE then the value
* parameter can be on of the following:
* <p/>
* TEXTURE_CUBE_MAP_POSITIVE_X TEXTURE_CUBE_MAP_NEGATIVE_X TEXTURE_CUBE_MAP_POSITIVE_Y TEXTURE_CUBE_MAP_NEGATIVE_Y
* TEXTURE_CUBE_MAP_POSITIVE_Z TEXTURE_CUBE_MAP_NEGATIVE_Z
*
* @param attrib
* @param value
*/
public synchronized void setAttrib(int attrib, int value) {
nSetAttrib(handle, attrib, value);
}
private static native void nSetAttrib(int handle, int attrib, int value);
/**
* Binds the currently bound texture to the buffer specified. The buffer can be one of the following:
* <p/>
* FRONT_LEFT_BUFFER FRONT_RIGHT_BUFFER BACK_LEFT_BUFFER BACK_RIGHT_BUFFER DEPTH_BUFFER
*
* @param buffer
*/
public synchronized void bindTexImage(int buffer) {
nBindTexImage(handle, buffer);
}
private static native void nBindTexImage(int handle, int buffer);
/**
* Releases the currently bound texture from the buffer specified.
*
* @param buffer
*/
public synchronized void releaseTexImage(int buffer) {
nReleaseTexImage(handle, buffer);
}
private static native void nReleaseTexImage(int handle, int buffer);
/**
* @return Returns the height.
*/
public int getHeight() {
return height;
}
/**
* @return Returns the width.
*/
public int getWidth() {
return width;
}
}

268
src/java/org/lwjgl/opengl/RenderTexture.java Normal file
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@ -0,0 +1,268 @@
/*
* Copyright (c) 2002 Lightweight Java Game Library Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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 'Light Weight Java Game Library' 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
* 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.
*/
/*
* Created by LWJGL.
* User: spasi
* Date: 2004-03-01
* Time: 23:24:38
*/
package org.lwjgl.opengl;
import org.lwjgl.BufferUtils;
import java.nio.IntBuffer;
/**
* This class represents the state necessary for render-to-texture.
*/
public final class RenderTexture {
// ----------------------------------------------------------------------------------
// ----------------------------- WGL_ARB_render_texture -----------------------------
// ----------------------------------------------------------------------------------
/*
Accepted by the <piAttributes> parameter of wglGetPixelFormatAttribivARB,
wglGetPixelFormatAttribfvARB, and the <piAttribIList> and <pfAttribIList>
parameters of wglChoosePixelFormatARB:
*/
private static final int WGL_BIND_TO_TEXTURE_RGB_ARB = 0x2070;
private static final int WGL_BIND_TO_TEXTURE_RGBA_ARB = 0x2071;
/*
Accepted by the <piAttribList> parameter of wglCreatePbufferARB and
by the <iAttribute> parameter of wglQueryPbufferARB:
*/
private static final int WGL_TEXTURE_FORMAT_ARB = 0x2072;
private static final int WGL_TEXTURE_TARGET_ARB = 0x2073;
private static final int WGL_MIPMAP_TEXTURE_ARB = 0x2074;
/*
Accepted as a value in the <piAttribList> parameter of
wglCreatePbufferARB and returned in the value parameter of
wglQueryPbufferARB when <iAttribute> is WGL_TEXTURE_FORMAT_ARB:
*/
private static final int WGL_TEXTURE_RGB_ARB = 0x2075;
private static final int WGL_TEXTURE_RGBA_ARB = 0x2076;
/*
Accepted as a value in the <piAttribList> parameter of
wglCreatePbufferARB and returned in the value parameter of
wglQueryPbufferARB when <iAttribute> is WGL_TEXTURE_TARGET_ARB:
*/
private static final int WGL_TEXTURE_CUBE_MAP_ARB = 0x2078;
private static final int WGL_TEXTURE_1D_ARB = 0x2079;
private static final int WGL_TEXTURE_2D_ARB = 0x207A;
private static final int WGL_NO_TEXTURE_ARB = 0x2077;
/*
Accepted by the <piAttribList> parameter of wglSetPbufferAttribARB and
by the <iAttribute> parameter of wglQueryPbufferARB:
*/
static final int WGL_MIPMAP_LEVEL_ARB = 0x207B;
static final int WGL_CUBE_MAP_FACE_ARB = 0x207C;
/*
Accepted as a value in the <piAttribList> parameter of
wglSetPbufferAttribARB and returned in the value parameter of
wglQueryPbufferARB when <iAttribute> is WGL_CUBE_MAP_FACE_ARB:
*/
static final int WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB = 0x207D;
static final int WGL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB = 0x207E;
static final int WGL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB = 0x207F;
static final int WGL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB = 0x2080;
static final int WGL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB = 0x2081;
static final int WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB = 0x2082;
/*
Accepted by the <iBuffer> parameter of wglBindTexImageARB and
wglReleaseTexImageARB:
*/
static final int WGL_FRONT_LEFT_ARB = 0x2083;
static final int WGL_FRONT_RIGHT_ARB = 0x2084;
static final int WGL_BACK_LEFT_ARB = 0x2085;
static final int WGL_BACK_RIGHT_ARB = 0x2086;
/*
private static final int WGL_AUX0_ARB = 0x2087;
private static final int WGL_AUX1_ARB = 0x2088;
private static final int WGL_AUX2_ARB = 0x2089;
private static final int WGL_AUX3_ARB = 0x208A;
private static final int WGL_AUX4_ARB = 0x208B;
private static final int WGL_AUX5_ARB = 0x208C;
private static final int WGL_AUX6_ARB = 0x208D;
private static final int WGL_AUX7_ARB = 0x208E;
private static final int WGL_AUX8_ARB = 0x208F;
private static final int WGL_AUX9_ARB = 0x2090;
*/
// -------------------------------------------------------------------------------------------
// ----------------------------- WGL_NV_render_texture_rectangle -----------------------------
// -------------------------------------------------------------------------------------------
/*
Accepted by the <piAttributes> parameter of wglGetPixelFormatAttribivARB,
wglGetPixelFormatAttribfvARB, and the <piAttribIList> and <pfAttribIList>
parameters of wglChoosePixelFormatARB:
*/
private static final int WGL_BIND_TO_TEXTURE_RECTANGLE_RGB_NV = 0x20A0;
private static final int WGL_BIND_TO_TEXTURE_RECTANGLE_RGBA_NV = 0x20A1;
/*
Accepted as a value in the <piAttribList> parameter of wglCreatePbufferARB
and returned in the value parameter of wglQueryPbufferARB when
<iAttribute> is WGL_TEXTURE_TARGET_ARB:
*/
private static final int WGL_TEXTURE_RECTANGLE_NV = 0x20A2;
// ---------------------------------------------------------------------------------------
// ----------------------------- WGL_NV_render_depth_texture -----------------------------
// ---------------------------------------------------------------------------------------
/*
Accepted by the <piAttributes> parameter of wglGetPixelFormatAttribivARB,
wglGetPixelFormatAttribfvARB, and the <piAttribIList> and <pfAttribIList>
parameters of wglChoosePixelFormatARB:
*/
private static final int WGL_BIND_TO_TEXTURE_DEPTH_NV = 0x20A3;
private static final int WGL_BIND_TO_TEXTURE_RECTANGLE_DEPTH_NV = 0x20A4;
/*
Accepted by the <piAttribList> parameter of wglCreatePbufferARB and
by the <iAttribute> parameter of wglQueryPbufferARB:
*/
private static final int WGL_DEPTH_TEXTURE_FORMAT_NV = 0x20A5;
/*
Accepted as a value in the <piAttribList> parameter of wglCreatePbufferARB
and returned in the value parameter of wglQueryPbufferARB when
<iAttribute> is WGL_DEPTH_TEXTURE_FORMAT_NV:
*/
private static final int WGL_TEXTURE_DEPTH_COMPONENT_NV = 0x20A6;
/*
Accepted by the <iBuffer> parameter of wglBindTexImageARB:
*/
static final int WGL_DEPTH_COMPONENT_NV = 0x20A7;
/**
* The TEXTURE_1D target.
*/
public static final int RENDER_TEXTURE_1D = WGL_TEXTURE_1D_ARB;
/**
* The TEXTURE_2D target.
*/
public static final int RENDER_TEXTURE_2D = WGL_TEXTURE_2D_ARB;
/**
* The TEXTURE_RECTANGLE target.
*/
public static final int RENDER_TEXTURE_RECTANGLE = WGL_TEXTURE_RECTANGLE_NV;
/**
* The TEXTURE_CUBE_MAP target.
*/
public static final int RENDER_TEXTURE_CUBE_MAP = WGL_TEXTURE_CUBE_MAP_ARB;
IntBuffer pixelFormatCaps;
IntBuffer pBufferAttribs;
/**
* Creates a RenderTexture object for enabling render-to-texture on a P-buffer.
* <p/>
* NOTE: Only one of useRGB and useRGBA can be true at the same time.
* <p/>
* NOTE: useRGB(A) and useDepth can be true at the same time, thus allowing two different render textures.
* <p/>
* NOTE: The target parameter can be one of the following:
* <p/>
* RENDER_TEXTURE_1D
* RENDER_TEXTURE_2D
* RENDER_TEXTURE_RECTANGLE
* RENDER_TEXTURE_CUBE_MAP
*
* @param useRGB - When true the P-buffer can be used as an RGB render texture.
* @param useRGBA - When true the P-buffer can be used as an RGBA render texture.
* @param useDepth - When true the P-buffer can be used as a depth render texture.
* @param isRectangle - When true rectangle textures will be allowed on the P-buffer.
* @param target - The texture target of the render texture.
* @param mipmaps - How many mipmap levels to allocate on the P-buffer.
*/
public RenderTexture(boolean useRGB, boolean useRGBA, boolean useDepth, boolean isRectangle, int target, int mipmaps) {
if ( useRGB && useRGBA )
throw new IllegalArgumentException("A RenderTexture can't be both RGB and RGBA.");
if ( mipmaps < 0 )
throw new IllegalArgumentException("The mipmap levels can't be negative.");
if ( isRectangle && target != RENDER_TEXTURE_RECTANGLE )
throw new IllegalArgumentException("When the RenderTexture is rectangle the target must be RENDER_TEXTURE_RECTANGLE.");
pixelFormatCaps = BufferUtils.createIntBuffer(4);
pBufferAttribs = BufferUtils.createIntBuffer(8);
if ( useRGB ) {
pixelFormatCaps.put(isRectangle ? WGL_BIND_TO_TEXTURE_RECTANGLE_RGB_NV : WGL_BIND_TO_TEXTURE_RGB_ARB);
pixelFormatCaps.put(GL11.GL_TRUE);
pBufferAttribs.put(WGL_TEXTURE_FORMAT_ARB);
pBufferAttribs.put(WGL_TEXTURE_RGB_ARB);
} else if ( useRGBA ) {
pixelFormatCaps.put(isRectangle ? WGL_BIND_TO_TEXTURE_RECTANGLE_RGBA_NV : WGL_BIND_TO_TEXTURE_RGBA_ARB);
pixelFormatCaps.put(GL11.GL_TRUE);
pBufferAttribs.put(WGL_TEXTURE_FORMAT_ARB);
pBufferAttribs.put(WGL_TEXTURE_RGBA_ARB);
}
if ( useDepth ) {
pixelFormatCaps.put(isRectangle ? WGL_BIND_TO_TEXTURE_RECTANGLE_DEPTH_NV : WGL_BIND_TO_TEXTURE_DEPTH_NV);
pixelFormatCaps.put(GL11.GL_TRUE);
pBufferAttribs.put(WGL_DEPTH_TEXTURE_FORMAT_NV);
pBufferAttribs.put(WGL_TEXTURE_DEPTH_COMPONENT_NV);
}
pBufferAttribs.put(WGL_TEXTURE_TARGET_ARB);
pBufferAttribs.put(target);
if ( mipmaps != 0 ) {
pBufferAttribs.put(WGL_MIPMAP_TEXTURE_ARB);
pBufferAttribs.put(mipmaps);
}
pixelFormatCaps.flip();
pBufferAttribs.flip();
}
}