Example usage for org.lwjgl.opengl GL11 glReadPixels

Introduction

In this page you can find the example usage for org.lwjgl.opengl GL11 glReadPixels.

Prototype

public static void glReadPixels(@NativeType("GLint") int x, @NativeType("GLint") int y,
        @NativeType("GLsizei") int width, @NativeType("GLsizei") int height, @NativeType("GLenum") int format,
        @NativeType("GLenum") int type, @NativeType("void *") float[] pixels) 

Source Link

Document

Array version of: #glReadPixels ReadPixels

Usage

From source file:playn.java.JavaGL20.java

License:Apache License

@Override
public void glReadPixels(int x, int y, int width, int height, int format, int type, Buffer pixels) {
    if (pixels instanceof ByteBuffer)
        GL11.glReadPixels(x, y, width, height, format, type, (ByteBuffer) pixels);
    else if (pixels instanceof ShortBuffer)
        GL11.glReadPixels(x, y, width, height, format, type, (ShortBuffer) pixels);
    else if (pixels instanceof IntBuffer)
        GL11.glReadPixels(x, y, width, height, format, type, (IntBuffer) pixels);
    else if (pixels instanceof FloatBuffer)
        GL11.glReadPixels(x, y, width, height, format, type, (FloatBuffer) pixels);
    else/*from   ww  w  .j av a2  s .c o m*/
        throw new RuntimeException(
                "Can't use " + pixels.getClass().getName() + " with this method. Use ByteBuffer, "
                        + "ShortBuffer, IntBuffer or FloatBuffer instead. Blame LWJGL");
}

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From source file:playn.java.JavaGL20.java

License:Apache License

@Override
public void glReadPixels(int x, int y, int width, int height, int format, int type, int pixelsBufferOffset) {
    GL11.glReadPixels(x, y, width, height, format, type, pixelsBufferOffset);
}

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From source file:processing.lwjgl.PGL.java

License:Open Source License

public void readPixels(int x, int y, int width, int height, int format, int type, Buffer buffer) {

    GL11.glReadPixels(x, y, width, height, format, type, (IntBuffer) buffer);
}

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From source file:processing.lwjgl.PLWJGL.java

License:Open Source License

protected void readPixelsImpl(int x, int y, int width, int height, int format, int type, Buffer buffer) {
    GL11.glReadPixels(x, y, width, height, format, type, (IntBuffer) buffer);
}

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From source file:processing.opengl.PLWJGL.java

License:Open Source License

@Override
protected void readPixelsImpl(int x, int y, int width, int height, int format, int type, Buffer buffer) {
    GL11.glReadPixels(x, y, width, height, format, type, (IntBuffer) buffer);
}

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From source file:shadowmage.meim.client.gui.GuiModelEditor.java

License:Open Source License

protected void doSelection() {
    int posX = Mouse.getX();
    int posY = Mouse.getY();

    GL11.glDisable(GL11.GL_TEXTURE_2D);//from w  w  w  . jav  a2  s .  co  m
    GL11.glClearColor(1.f, 1.f, 1.f, 1.f);
    GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
    GuiModelEditor.model.renderForSelection();

    byte[] pixelColorsb = new byte[3];
    ByteBuffer pixelColors = ByteBuffer.allocateDirect(3);
    GL11.glReadPixels(posX, posY, 1, 1, GL11.GL_RGB, GL11.GL_BYTE, pixelColors);

    for (int i = 0; i < 3; i++) {
        pixelColorsb[i] = pixelColors.get(i);
    }

    int r = pixelColorsb[0];
    int g = pixelColorsb[1];
    int b = pixelColorsb[2];

    GL11.glEnable(GL11.GL_TEXTURE_2D);
    AWLog.logDebug("colors clicked on: " + r + "," + g + "," + b);
    int color = (r << 16) | (g << 8) | b;
    AWLog.logDebug("color out: " + color);

    GL11.glClearColor(.2f, .2f, .2f, 1.f);
    GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
    Primitive p = model.getPrimitive(color);
    if (p == null) {
        this.setSelectedPiece(null);
        this.setSelectedPrimitive(null);
    } else {
        this.setSelectedPrimitive(p);
    }
}

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From source file:src.graphics.widgets.UINode.java

License:Open Source License

final public static ByteBuffer copyPixels(Box2D area, ByteBuffer pixels) {
    final int size = ((int) area.xdim()) * ((int) area.ydim()) * 4;
    if (pixels == null || pixels.capacity() != size) {
        pixels = BufferUtils.createByteBuffer(size);
    } else/* ww w.  j  a  v a  2  s . c  om*/
        pixels.rewind();
    GL11.glReadPixels((int) area.xpos(), (int) area.ypos(), (int) area.xdim(), (int) area.ydim(), GL11.GL_RGBA,
            GL11.GL_UNSIGNED_BYTE, pixels);
    return pixels;
}

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From source file:tectonicus.rasteriser.lwjgl.LwjglRasteriser.java

License:BSD License

public BufferedImage takeScreenshot2(final int startX, final int startY, final int width, final int height,
        ImageFormat imageFormat) {/*from   ww  w. j a  v  a 2  s  .  co  m*/
    ByteBuffer screenContentsBytes = ByteBuffer.allocateDirect(width * height * 4)
            .order(ByteOrder.LITTLE_ENDIAN);
    IntBuffer screenContents = screenContentsBytes.asIntBuffer();

    GL11.glReadPixels(startX, startY, width, height, GL12.GL_BGRA, GL11.GL_UNSIGNED_BYTE, screenContents);

    int[] pixels = new int[width * height];
    screenContents.get(pixels);

    final int pixelFormat = imageFormat.hasAlpha() ? BufferedImage.TYPE_4BYTE_ABGR
            : BufferedImage.TYPE_3BYTE_BGR;
    BufferedImage img = new BufferedImage(width, height, pixelFormat);
    for (int x = 0; x < width; x++) {
        for (int y = 0; y < height; y++) {
            final int rgba = pixels[x + y * width];

            img.setRGB(x, height - 1 - y, rgba);
        }
    }

    return img;
}

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From source file:tectonicus.rasteriser.lwjgl.LwjglRasteriser.java

License:BSD License

public BufferedImage takeScreenshot(final int startX, final int startY, final int width, final int height,
        ImageFormat imageFormat) {// ww w . j  a  va2s  . c om
    BufferedImage img = null;

    ByteBuffer screenContentsBytes = ByteBuffer.allocateDirect(width * height * 4)
            .order(ByteOrder.LITTLE_ENDIAN);
    IntBuffer screenContents = screenContentsBytes.asIntBuffer();

    if (imageFormat.hasAlpha()) {
        img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        int[] pixels = ((DataBufferInt) (img.getRaster().getDataBuffer())).getData();

        GL11.glReadPixels(startX, startY, width, height, GL12.GL_BGRA, GL11.GL_UNSIGNED_BYTE, screenContents);

        for (int y = startY; y < startY + height; y++) {
            screenContents.position(y * width);
            screenContents.get(pixels, (height - y - 1) * width, width);
        }
    } else {
        img = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
        byte[] pixels = ((DataBufferByte) (img.getRaster().getDataBuffer())).getData();

        GL11.glReadPixels(startX, startY, width, height, GL12.GL_BGR, GL11.GL_UNSIGNED_BYTE, screenContents);

        for (int y = startY; y < startY + height; y++) {
            screenContentsBytes.position(y * width * 3);
            screenContentsBytes.get(pixels, (height - y - 1) * width * 3, width * 3);
        }
    }

    return img;
}

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From source file:tk.ivybits.engine.gl.GL.java

License:Open Source License

public static void glReadPixels(int a, int b, int c, int d, int e, int f, DoubleBuffer g) {
    GL11.glReadPixels(a, b, c, d, e, f, g);
}

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