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/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.badlogic.gdx.graphics;
import java.io.IOException;
import java.nio.ByteBuffer;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.g2d.Gdx2DPixmap;
import com.badlogic.gdx.utils.Disposable;
import com.badlogic.gdx.utils.GdxRuntimeException;
/**
* A Pixmap represents an image in memory. It has a width and height expressed in pixels as well as a {@link Format} specifying
* the number and order of color components per pixel. Coordinates of pixels are specified with respect to the top left corner of
* the image, with the x-axis pointing to the right and the y-axis pointing downwards.
*
*
*
* By default all methods use blending. You can disable blending with {@link Pixmap#setBlending(Blending)}. The
* {@link Pixmap#drawPixmap(Pixmap, int, int, int, int, int, int, int, int)} method will scale and stretch the source image to a
* target image. There either nearest neighbour or bilinear filtering can be used.
*
*
*
* A Pixmap stores its data in native heap memory. It is mandatory to call {@link Pixmap#dispose()} when the pixmap is no longer
* needed, otherwise memory leaks will result
*
*
* @author [email protected] */
public class Pixmap implements Disposable {
/** Different pixel formats.
*
* @author mzechner */
public enum Format {
Alpha, Intensity, LuminanceAlpha, RGB565, RGBA4444, RGB888, RGBA8888;
public static int toGdx2DPixmapFormat (Format format) {
if (format == Alpha) return Gdx2DPixmap.GDX2D_FORMAT_ALPHA;
if (format == Intensity) return Gdx2DPixmap.GDX2D_FORMAT_ALPHA;
if (format == LuminanceAlpha) return Gdx2DPixmap.GDX2D_FORMAT_LUMINANCE_ALPHA;
if (format == RGB565) return Gdx2DPixmap.GDX2D_FORMAT_RGB565;
if (format == RGBA4444) return Gdx2DPixmap.GDX2D_FORMAT_RGBA4444;
if (format == RGB888) return Gdx2DPixmap.GDX2D_FORMAT_RGB888;
if (format == RGBA8888) return Gdx2DPixmap.GDX2D_FORMAT_RGBA8888;
throw new GdxRuntimeException("Unknown Format: " + format);
}
public static Format fromGdx2DPixmapFormat (int format) {
if (format == Gdx2DPixmap.GDX2D_FORMAT_ALPHA) return Alpha;
if (format == Gdx2DPixmap.GDX2D_FORMAT_LUMINANCE_ALPHA) return LuminanceAlpha;
if (format == Gdx2DPixmap.GDX2D_FORMAT_RGB565) return RGB565;
if (format == Gdx2DPixmap.GDX2D_FORMAT_RGBA4444) return RGBA4444;
if (format == Gdx2DPixmap.GDX2D_FORMAT_RGB888) return RGB888;
if (format == Gdx2DPixmap.GDX2D_FORMAT_RGBA8888) return RGBA8888;
throw new GdxRuntimeException("Unknown Gdx2DPixmap Format: " + format);
}
}
/** Blending functions to be set with {@link Pixmap#setBlending}.
* @author mzechner */
public enum Blending {
None, SourceOver
}
/** Filters to be used with {@link Pixmap#drawPixmap(Pixmap, int, int, int, int, int, int, int, int)}.
*
* @author mzechner */
public enum Filter {
NearestNeighbour, BiLinear
}
/** global blending state **/
private static Blending blending = Blending.SourceOver;
final Gdx2DPixmap pixmap;
int color = 0;
private boolean disposed;
/** Sets the type of {@link Blending} to be used for all operations. Default is {@link Blending#SourceOver}.
* @param blending the blending type */
public static void setBlending (Blending blending) {
Pixmap.blending = blending;
Gdx2DPixmap.setBlend(blending == Blending.None ? 0 : 1);
}
/** Sets the type of interpolation {@link Filter} to be used in conjunction with
* {@link Pixmap#drawPixmap(Pixmap, int, int, int, int, int, int, int, int)}.
* @param filter the filter. */
public static void setFilter (Filter filter) {
Gdx2DPixmap.setScale(filter == Filter.NearestNeighbour ? Gdx2DPixmap.GDX2D_SCALE_NEAREST : Gdx2DPixmap.GDX2D_SCALE_LINEAR);
}
/** Creates a new Pixmap instance with the given width, height and format.
* @param width the width in pixels
* @param height the height in pixels
* @param format the {@link Format} */
public Pixmap (int width, int height, Format format) {
pixmap = new Gdx2DPixmap(width, height, Format.toGdx2DPixmapFormat(format));
setColor(0, 0, 0, 0);
fill();
}
/** Creates a new Pixmap instance from the given encoded image data. The image can be encoded as JPEG, PNG or BMP.
* @param encodedData the encoded image data
* @param offset the offset
* @param len the length */
public Pixmap (byte[] encodedData, int offset, int len) {
try {
pixmap = new Gdx2DPixmap(encodedData, offset, len, 0);
} catch (IOException e) {
throw new GdxRuntimeException("Couldn't load pixmap from image data", e);
}
}
/** Creates a new Pixmap instance from the given file. The file must be a Png, Jpeg or Bitmap. Paletted formats are not
* supported.
*
* @param file the {@link FileHandle} */
public Pixmap (FileHandle file) {
try {
byte[] bytes = file.readBytes();
pixmap = new Gdx2DPixmap(bytes, 0, bytes.length, 0);
} catch (Exception e) {
throw new GdxRuntimeException("Couldn't load file: " + file, e);
}
}
/** Constructs a new Pixmap from a {@link Gdx2DPixmap}.
* @param pixmap */
public Pixmap (Gdx2DPixmap pixmap) {
this.pixmap = pixmap;
}
/** Sets the color for the following drawing operations
* @param color the color, encoded as RGBA8888 */
public void setColor (int color) {
this.color = color;
}
/** Sets the color for the following drawing operations.
*
* @param r The red component.
* @param g The green component.
* @param b The blue component.
* @param a The alpha component. */
public void setColor (float r, float g, float b, float a) {
color = Color.rgba8888(r, g, b, a);
}
/** Sets the color for the following drawing operations.
* @param color The color. */
public void setColor (Color color) {
this.color = Color.rgba8888(color.r, color.g, color.b, color.a);
}
/** Fills the complete bitmap with the currently set color. */
public void fill () {
pixmap.clear(color);
}
// /**
// * Sets the width in pixels of strokes.
// *
// * @param width The stroke width in pixels.
// */
// public void setStrokeWidth (int width);
/** Draws a line between the given coordinates using the currently set color.
*
* @param x The x-coodinate of the first point
* @param y The y-coordinate of the first point
* @param x2 The x-coordinate of the first point
* @param y2 The y-coordinate of the first point */
public void drawLine (int x, int y, int x2, int y2) {
pixmap.drawLine(x, y, x2, y2, color);
}
/** Draws a rectangle outline starting at x, y extending by width to the right and by height downwards (y-axis points downwards)
* using the current color.
*
* @param x The x coordinate
* @param y The y coordinate
* @param width The width in pixels
* @param height The height in pixels */
public void drawRectangle (int x, int y, int width, int height) {
pixmap.drawRect(x, y, width, height, color);
}
/** Draws an area form another Pixmap to this Pixmap.
*
* @param pixmap The other Pixmap
* @param x The target x-coordinate (top left corner)
* @param y The target y-coordinate (top left corner)
*/
public void drawPixmap(Pixmap pixmap, int x, int y) {
drawPixmap(pixmap, x, y, 0, 0, pixmap.getWidth(), pixmap.getHeight());
}
/** Draws an area form another Pixmap to this Pixmap.
*
* @param pixmap The other Pixmap
* @param x The target x-coordinate (top left corner)
* @param y The target y-coordinate (top left corner)
* @param srcx The source x-coordinate (top left corner)
* @param srcy The source y-coordinate (top left corner);
* @param srcWidth The width of the area form the other Pixmap in pixels
* @param srcHeight The height of the area form the other Pixmap in pixles */
public void drawPixmap (Pixmap pixmap, int x, int y, int srcx, int srcy, int srcWidth, int srcHeight) {
this.pixmap.drawPixmap(pixmap.pixmap, srcx, srcy, x, y, srcWidth, srcHeight);
}
/** Draws an area form another Pixmap to this Pixmap. This will automatically scale and stretch the source image to the
* specified target rectangle. Use {@link Pixmap#setFilter(Filter)} to specify the type of filtering to be used (nearest
* neighbour or bilinear).
*
* @param pixmap The other Pixmap
* @param srcx The source x-coordinate (top left corner)
* @param srcy The source y-coordinate (top left corner);
* @param srcWidth The width of the area form the other Pixmap in pixels
* @param srcHeight The height of the area form the other Pixmap in pixles
* @param dstx The target x-coordinate (top left corner)
* @param dsty The target y-coordinate (top left corner)
* @param dstWidth The target width
* @param dstHeight the target height */
public void drawPixmap (Pixmap pixmap, int srcx, int srcy, int srcWidth, int srcHeight, int dstx, int dsty, int dstWidth,
int dstHeight) {
this.pixmap.drawPixmap(pixmap.pixmap, srcx, srcy, srcWidth, srcHeight, dstx, dsty, dstWidth, dstHeight);
}
/** Fills a rectangle starting at x, y extending by width to the right and by height downwards (y-axis points downwards) using
* the current color.
*
* @param x The x coordinate
* @param y The y coordinate
* @param width The width in pixels
* @param height The height in pixels */
public void fillRectangle (int x, int y, int width, int height) {
pixmap.fillRect(x, y, width, height, color);
}
/** Draws a circle outline with the center at x,y and a radius using the current color and stroke width.
*
* @param x The x-coordinate of the center
* @param y The y-coordinate of the center
* @param radius The radius in pixels */
public void drawCircle (int x, int y, int radius) {
pixmap.drawCircle(x, y, radius, color);
}
/** Fills a circle with the center at x,y and a radius using the current color.
*
* @param x The x-coordinate of the center
* @param y The y-coordinate of the center
* @param radius The radius in pixels */
public void fillCircle (int x, int y, int radius) {
pixmap.fillCircle(x, y, radius, color);
}
/** Returns the 32-bit RGBA8888 value of the pixel at x, y. For Alpha formats the RGB components will be one.
*
* @param x The x-coordinate
* @param y The y-coordinate
* @return The pixel color in RGBA8888 format. */
public int getPixel (int x, int y) {
return pixmap.getPixel(x, y);
}
/** @return The width of the Pixmap in pixels. */
public int getWidth () {
return pixmap.getWidth();
}
/** @return The height of the Pixmap in pixels. */
public int getHeight () {
return pixmap.getHeight();
}
/** Releases all resources associated with this Pixmap. */
public void dispose () {
if(disposed) throw new GdxRuntimeException("Pixmap already disposed!");
pixmap.dispose();
disposed = true;
}
/** Draws a pixel at the given location with the current color.
*
* @param x the x-coordinate
* @param y the y-coordinate */
public void drawPixel (int x, int y) {
pixmap.setPixel(x, y, color);
}
/** Draws a pixel at the given location with the given color.
*
* @param x the x-coordinate
* @param y the y-coordinate
* @param color the color in RGBA8888 format. */
public void drawPixel (int x, int y, int color) {
pixmap.setPixel(x, y, color);
}
/** Returns the OpenGL ES format of this Pixmap. Used as the seventh parameter to
* {@link GLCommon#glTexImage2D(int, int, int, int, int, int, int, int, java.nio.Buffer)}.
* @return one of GL_ALPHA, GL_RGB, GL_RGBA, GL_LUMINANCE, or GL_LUMINANCE_ALPHA. */
public int getGLFormat () {
return pixmap.getGLFormat();
}
/** Returns the OpenGL ES format of this Pixmap. Used as the third parameter to
* {@link GLCommon#glTexImage2D(int, int, int, int, int, int, int, int, java.nio.Buffer)}.
* @return one of GL_ALPHA, GL_RGB, GL_RGBA, GL_LUMINANCE, or GL_LUMINANCE_ALPHA. */
public int getGLInternalFormat () {
return pixmap.getGLInternalFormat();
}
/** Returns the OpenGL ES type of this Pixmap. Used as the eighth parameter to
* {@link GLCommon#glTexImage2D(int, int, int, int, int, int, int, int, java.nio.Buffer)}.
* @return one of GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT_4_4_4_4 */
public int getGLType () {
return pixmap.getGLType();
}
/** Returns the direct ByteBuffer holding the pixel data. For the format Alpha each value is encoded as a byte. For the format
* LuminanceAlpha the luminance is the first byte and the alpha is the second byte of the pixel. For the formats RGB888 and
* RGBA8888 the color components are stored in a single byte each in the order red, green, blue (alpha). For the formats RGB565
* and RGBA4444 the pixel colors are stored in shorts in machine dependent order.
* @return the direct {@link ByteBuffer} holding the pixel data. */
public ByteBuffer getPixels () {
if(disposed) throw new GdxRuntimeException("Pixmap already disposed");
return pixmap.getPixels();
}
/** @return the {@link Format} of this Pixmap. */
public Format getFormat () {
return Format.fromGdx2DPixmapFormat(pixmap.getFormat());
}
/** @return the currently set {@link Blending} */
public static Blending getBlending () {
return blending;
}
}
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