Java tutorial
/******************************************************************************* * 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.g2d; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.nio.ByteBuffer; import com.badlogic.gdx.graphics.GL20; import com.badlogic.gdx.utils.Disposable; import com.badlogic.gdx.utils.GdxRuntimeException; /** @author mzechner */ public class Gdx2DPixmap implements Disposable { public static final int GDX2D_FORMAT_ALPHA = 1; public static final int GDX2D_FORMAT_LUMINANCE_ALPHA = 2; public static final int GDX2D_FORMAT_RGB888 = 3; public static final int GDX2D_FORMAT_RGBA8888 = 4; public static final int GDX2D_FORMAT_RGB565 = 5; public static final int GDX2D_FORMAT_RGBA4444 = 6; public static final int GDX2D_SCALE_NEAREST = 0; public static final int GDX2D_SCALE_LINEAR = 1; public static final int GDX2D_BLEND_NONE = 0; public static final int GDX2D_BLEND_SRC_OVER = 1; long basePtr; int width; int height; int format; ByteBuffer pixelPtr; long[] nativeData = new long[4]; static { setBlend(GDX2D_BLEND_SRC_OVER); setScale(GDX2D_SCALE_LINEAR); } public Gdx2DPixmap(byte[] encodedData, int offset, int len, int requestedFormat) throws IOException { pixelPtr = load(nativeData, encodedData, offset, len); if (pixelPtr == null) throw new IOException("Error loading pixmap: " + getFailureReason()); basePtr = nativeData[0]; width = (int) nativeData[1]; height = (int) nativeData[2]; format = (int) nativeData[3]; if (requestedFormat != 0 && requestedFormat != format) { convert(requestedFormat); } } public Gdx2DPixmap(InputStream in, int requestedFormat) throws IOException { ByteArrayOutputStream bytes = new ByteArrayOutputStream(1024); byte[] buffer = new byte[1024]; int readBytes = 0; while ((readBytes = in.read(buffer)) != -1) { bytes.write(buffer, 0, readBytes); } buffer = bytes.toByteArray(); pixelPtr = load(nativeData, buffer, 0, buffer.length); if (pixelPtr == null) throw new IOException("Error loading pixmap: " + getFailureReason()); basePtr = nativeData[0]; width = (int) nativeData[1]; height = (int) nativeData[2]; format = (int) nativeData[3]; if (requestedFormat != 0 && requestedFormat != format) { convert(requestedFormat); } } /** @throws GdxRuntimeException if allocation failed. */ public Gdx2DPixmap(int width, int height, int format) throws GdxRuntimeException { pixelPtr = newPixmap(nativeData, width, height, format); if (pixelPtr == null) throw new GdxRuntimeException("Error loading pixmap."); this.basePtr = nativeData[0]; this.width = (int) nativeData[1]; this.height = (int) nativeData[2]; this.format = (int) nativeData[3]; } public Gdx2DPixmap(ByteBuffer pixelPtr, long[] nativeData) { this.pixelPtr = pixelPtr; this.basePtr = nativeData[0]; this.width = (int) nativeData[1]; this.height = (int) nativeData[2]; this.format = (int) nativeData[3]; } private void convert(int requestedFormat) { Gdx2DPixmap pixmap = new Gdx2DPixmap(width, height, requestedFormat); pixmap.drawPixmap(this, 0, 0, 0, 0, width, height); dispose(); this.basePtr = pixmap.basePtr; this.format = pixmap.format; this.height = pixmap.height; this.nativeData = pixmap.nativeData; this.pixelPtr = pixmap.pixelPtr; this.width = pixmap.width; } public void dispose() { free(basePtr); } public void clear(int color) { clear(basePtr, color); } public void setPixel(int x, int y, int color) { setPixel(basePtr, x, y, color); } public int getPixel(int x, int y) { return getPixel(basePtr, x, y); } public void drawLine(int x, int y, int x2, int y2, int color) { drawLine(basePtr, x, y, x2, y2, color); } public void drawRect(int x, int y, int width, int height, int color) { drawRect(basePtr, x, y, width, height, color); } public void drawCircle(int x, int y, int radius, int color) { drawCircle(basePtr, x, y, radius, color); } public void fillRect(int x, int y, int width, int height, int color) { fillRect(basePtr, x, y, width, height, color); } public void fillCircle(int x, int y, int radius, int color) { fillCircle(basePtr, x, y, radius, color); } public void fillTriangle(int x1, int y1, int x2, int y2, int x3, int y3, int color) { fillTriangle(basePtr, x1, y1, x2, y2, x3, y3, color); } public void drawPixmap(Gdx2DPixmap src, int srcX, int srcY, int dstX, int dstY, int width, int height) { drawPixmap(src.basePtr, basePtr, srcX, srcY, width, height, dstX, dstY, width, height); } public void drawPixmap(Gdx2DPixmap src, int srcX, int srcY, int srcWidth, int srcHeight, int dstX, int dstY, int dstWidth, int dstHeight) { drawPixmap(src.basePtr, basePtr, srcX, srcY, srcWidth, srcHeight, dstX, dstY, dstWidth, dstHeight); } public static Gdx2DPixmap newPixmap(InputStream in, int requestedFormat) { try { return new Gdx2DPixmap(in, requestedFormat); } catch (IOException e) { return null; } } public static Gdx2DPixmap newPixmap(int width, int height, int format) { try { return new Gdx2DPixmap(width, height, format); } catch (IllegalArgumentException e) { return null; } } public ByteBuffer getPixels() { return pixelPtr; } public int getHeight() { return height; } public int getWidth() { return width; } public int getFormat() { return format; } public int getGLInternalFormat() { switch (format) { case GDX2D_FORMAT_ALPHA: return GL20.GL_ALPHA; case GDX2D_FORMAT_LUMINANCE_ALPHA: return GL20.GL_LUMINANCE_ALPHA; case GDX2D_FORMAT_RGB888: case GDX2D_FORMAT_RGB565: return GL20.GL_RGB; case GDX2D_FORMAT_RGBA8888: case GDX2D_FORMAT_RGBA4444: return GL20.GL_RGBA; default: throw new GdxRuntimeException("unknown format: " + format); } } public int getGLFormat() { return getGLInternalFormat(); } public int getGLType() { switch (format) { case GDX2D_FORMAT_ALPHA: case GDX2D_FORMAT_LUMINANCE_ALPHA: case GDX2D_FORMAT_RGB888: case GDX2D_FORMAT_RGBA8888: return GL20.GL_UNSIGNED_BYTE; case GDX2D_FORMAT_RGB565: return GL20.GL_UNSIGNED_SHORT_5_6_5; case GDX2D_FORMAT_RGBA4444: return GL20.GL_UNSIGNED_SHORT_4_4_4_4; default: throw new GdxRuntimeException("unknown format: " + format); } } public String getFormatString() { switch (format) { case GDX2D_FORMAT_ALPHA: return "alpha"; case GDX2D_FORMAT_LUMINANCE_ALPHA: return "luminance alpha"; case GDX2D_FORMAT_RGB888: return "rgb888"; case GDX2D_FORMAT_RGBA8888: return "rgba8888"; case GDX2D_FORMAT_RGB565: return "rgb565"; case GDX2D_FORMAT_RGBA4444: return "rgba4444"; default: return "unknown"; } } // @off /*JNI #include <gdx2d/gdx2d.h> #include <stdlib.h> */ private static native ByteBuffer load(long[] nativeData, byte[] buffer, int offset, int len); /*MANUAL const unsigned char* p_buffer = (const unsigned char*)env->GetPrimitiveArrayCritical(buffer, 0); gdx2d_pixmap* pixmap = gdx2d_load(p_buffer + offset, len); env->ReleasePrimitiveArrayCritical(buffer, (char*)p_buffer, 0); if(pixmap==0) return 0; jobject pixel_buffer = env->NewDirectByteBuffer((void*)pixmap->pixels, pixmap->width * pixmap->height * gdx2d_bytes_per_pixel(pixmap->format)); jlong* p_native_data = (jlong*)env->GetPrimitiveArrayCritical(nativeData, 0); p_native_data[0] = (jlong)pixmap; p_native_data[1] = pixmap->width; p_native_data[2] = pixmap->height; p_native_data[3] = pixmap->format; env->ReleasePrimitiveArrayCritical(nativeData, p_native_data, 0); return pixel_buffer; */ private static native ByteBuffer newPixmap(long[] nativeData, int width, int height, int format); /*MANUAL gdx2d_pixmap* pixmap = gdx2d_new(width, height, format); if(pixmap==0) return 0; jobject pixel_buffer = env->NewDirectByteBuffer((void*)pixmap->pixels, pixmap->width * pixmap->height * gdx2d_bytes_per_pixel(pixmap->format)); jlong* p_native_data = (jlong*)env->GetPrimitiveArrayCritical(nativeData, 0); p_native_data[0] = (jlong)pixmap; p_native_data[1] = pixmap->width; p_native_data[2] = pixmap->height; p_native_data[3] = pixmap->format; env->ReleasePrimitiveArrayCritical(nativeData, p_native_data, 0); return pixel_buffer; */ private static native void free(long pixmap); /* gdx2d_free((gdx2d_pixmap*)pixmap); */ private static native void clear(long pixmap, int color); /* gdx2d_clear((gdx2d_pixmap*)pixmap, color); */ private static native void setPixel(long pixmap, int x, int y, int color); /* gdx2d_set_pixel((gdx2d_pixmap*)pixmap, x, y, color); */ private static native int getPixel(long pixmap, int x, int y); /* return gdx2d_get_pixel((gdx2d_pixmap*)pixmap, x, y); */ private static native void drawLine(long pixmap, int x, int y, int x2, int y2, int color); /* gdx2d_draw_line((gdx2d_pixmap*)pixmap, x, y, x2, y2, color); */ private static native void drawRect(long pixmap, int x, int y, int width, int height, int color); /* gdx2d_draw_rect((gdx2d_pixmap*)pixmap, x, y, width, height, color); */ private static native void drawCircle(long pixmap, int x, int y, int radius, int color); /* gdx2d_draw_circle((gdx2d_pixmap*)pixmap, x, y, radius, color); */ private static native void fillRect(long pixmap, int x, int y, int width, int height, int color); /* gdx2d_fill_rect((gdx2d_pixmap*)pixmap, x, y, width, height, color); */ private static native void fillCircle(long pixmap, int x, int y, int radius, int color); /* gdx2d_fill_circle((gdx2d_pixmap*)pixmap, x, y, radius, color); */ private static native void fillTriangle(long pixmap, int x1, int y1, int x2, int y2, int x3, int y3, int color); /* gdx2d_fill_triangle((gdx2d_pixmap*)pixmap, x1, y1, x2, y2, x3, y3, color); */ private static native void drawPixmap(long src, long dst, int srcX, int srcY, int srcWidth, int srcHeight, int dstX, int dstY, int dstWidth, int dstHeight); /* gdx2d_draw_pixmap((gdx2d_pixmap*)src, (gdx2d_pixmap*)dst, srcX, srcY, srcWidth, srcHeight, dstX, dstY, dstWidth, dstHeight); */ public static native void setBlend(int blend); /* gdx2d_set_blend(blend); */ public static native void setScale(int scale); /* gdx2d_set_scale(scale); */ public static native String getFailureReason(); /* return env->NewStringUTF(gdx2d_get_failure_reason()); */ }