402 lines
11 KiB
C++
402 lines
11 KiB
C++
/* qtimage.cpp --
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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#include <assert.h>
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#include <QImage>
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#include <QColor>
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#include <QMatrix>
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#include <QPainter>
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#include <gnu_java_awt_peer_qt_QtImage.h>
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#include "qtimage.h"
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#include "qtstrings.h"
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#include "qtgraphics.h"
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#include "nativewrapper.h"
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/* The constant fields in java.awt.Image */
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#define SCALE_DEFAULT 1
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#define SCALE_FAST 2
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#define SCALE_SMOOTH 4
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#define SCALE_REPLICATE 8
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#define SCALE_AREA_AVERAGING 16
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QImage *getQtImage( JNIEnv *env, jobject obj )
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{
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jclass cls = env->GetObjectClass( obj );
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jfieldID field = env->GetFieldID( cls, "nativeObject", "J" );
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return (QImage *)env->GetLongField( obj, field );
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}
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static void setNativePtr( JNIEnv *env, jobject obj, void *value )
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{
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jlong longValue = (jlong) value;
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jclass cls = env->GetObjectClass( obj );
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jfieldID field = env->GetFieldID( cls, "nativeObject", "J" );
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env->SetLongField( obj, field, longValue );
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}
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/*
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* Creates a QImage.
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*/
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JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtImage_createImage
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(JNIEnv *env, jobject obj)
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{
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int width, height;
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jclass cls;
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jfieldID field;
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cls = env->GetObjectClass( obj );
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field = env->GetFieldID (cls, "width", "I");
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assert (field != 0);
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width = env->GetIntField(obj, field);
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field = env->GetFieldID(cls, "height", "I");
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assert (field != 0);
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height = env->GetIntField(obj, field);
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QImage *image = new QImage ( width, height,
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QImage::Format_ARGB32_Premultiplied );
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setNativePtr(env, obj, image);
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}
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/*
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* Frees the image data.
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*/
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JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtImage_freeImage
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(JNIEnv *env, jobject obj)
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{
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QImage *image = getQtImage(env, obj);
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setNativePtr(env, obj, NULL);
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if ( image )
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delete image;
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}
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/*
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* Clears the image to zero.
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*/
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JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtImage_clear
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(JNIEnv *env, jobject obj)
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{
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QImage *image = getQtImage(env, obj);
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assert( image );
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image->fill(0);
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}
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/*
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* Returns the pixel data in an int array.
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*/
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JNIEXPORT jintArray JNICALL Java_gnu_java_awt_peer_qt_QtImage_getPixels
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(JNIEnv *env, jobject obj)
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{
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QImage *image = getQtImage(env, obj);
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jintArray result_array;
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jint *result_array_ptr, *dst;
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int x, y;
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jint pixel;
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QRgb current;
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assert( image );
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result_array = env->NewIntArray (image->width() * image->height());
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dst = result_array_ptr =
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env->GetIntArrayElements(result_array, NULL);
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// A bit inefficient.
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for ( y = 0; y < image->height(); y++)
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for ( x = 0; x < image->width(); x++)
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{
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current = image->pixel(x, y);
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pixel = 0;
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pixel = (qAlpha(current) & 0xFF) << 24 |
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(qRed(current) & 0xFF) << 16 |
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(qGreen(current) & 0xFF) << 8 |
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(qBlue(current) & 0xFF);
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*dst = pixel;
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dst++;
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}
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env->ReleaseIntArrayElements (result_array, result_array_ptr, 0);
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return result_array;
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}
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/*
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* Sets the pixel data.
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*/
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JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtImage_setPixels
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(JNIEnv *env, jobject obj, jintArray pixels)
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{
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QImage *image = getQtImage(env, obj);
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assert( image );
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int width, height;
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jint *src_array, *src;
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width = image->width();
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height = image->height();
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src = src_array =
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env->GetIntArrayElements(pixels, NULL);
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for(int i = 0 ; i < height; i++)
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{
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uchar *scanline = image->scanLine( i );
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memcpy((void *)scanline, (void *)src, width * 4);
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src += width;
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}
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env->ReleaseIntArrayElements(pixels, src_array, 0);
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}
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/*
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* Loads an image from a file,
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* returns true on success, false on failure.
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*/
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JNIEXPORT jboolean JNICALL Java_gnu_java_awt_peer_qt_QtImage_loadImage
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(JNIEnv *env, jobject obj, jstring fn)
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{
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QString *filename = getQString(env, fn);
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QImage *image = new QImage();
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bool retVal = image->load( *filename );
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delete filename;
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if(image->isNull() && !retVal)
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{
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setNativePtr(env, obj, NULL);
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return JNI_FALSE;
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}
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setNativePtr(env, obj, image);
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jclass cls = env->GetObjectClass( obj );
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jfieldID field = env->GetFieldID( cls, "width", "I" );
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env->SetIntField( obj, field, image->width() );
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field = env->GetFieldID( cls, "height", "I" );
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env->SetIntField( obj, field, image->height() );
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return JNI_TRUE;
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}
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/*
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* Creates the image from an array of java bytes.
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*/
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JNIEXPORT jboolean JNICALL Java_gnu_java_awt_peer_qt_QtImage_loadImageFromData
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(JNIEnv *env, jobject obj, jbyteArray data)
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{
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jbyte *src_array, *src;
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bool retVal;
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src = env->GetByteArrayElements(data, NULL);
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int len = env->GetArrayLength( data );
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QImage *image = new QImage();
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retVal = image->loadFromData( (uchar *) src, len);
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env->ReleaseByteArrayElements(data, src, 0);
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if(image->isNull() || retVal == false)
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{
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setNativePtr(env, obj, NULL);
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return JNI_FALSE;
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}
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setNativePtr(env, obj, image);
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jclass cls = env->GetObjectClass( obj );
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jfieldID field = env->GetFieldID( cls, "width", "I" );
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env->SetIntField( obj, field, image->width() );
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field = env->GetFieldID( cls, "height", "I" );
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env->SetIntField( obj, field, image->height() );
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return JNI_TRUE;
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}
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/*
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*/
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JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtImage_createScaledImage
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(JNIEnv *env, jobject obj, jobject src, jint hints)
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{
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int w,h;
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jclass cls;
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jfieldID field;
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cls = env->GetObjectClass( obj );
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field = env->GetFieldID(cls, "width", "I");
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assert (field != 0);
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w = env->GetIntField(obj, field);
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field = env->GetFieldID(cls, "height", "I");
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assert (field != 0);
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h = env->GetIntField(obj, field);
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QImage *image = getQtImage(env, src);
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assert( image );
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QImage imageScaled;
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if (hints == SCALE_SMOOTH || hints == SCALE_AREA_AVERAGING)
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imageScaled = image->scaled(w, h,
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Qt::IgnoreAspectRatio,
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Qt::SmoothTransformation);
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else
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imageScaled = image->scaled(w, h,
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Qt::IgnoreAspectRatio,
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Qt::FastTransformation);
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QImage *scaledPtr = new QImage( imageScaled );
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// create new QtImage object
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setNativePtr( env, obj, scaledPtr );
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}
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/*
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* Simple draw without scaling.
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*/
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JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtImage_drawPixels
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(JNIEnv *env, jobject obj, jobject graphics, jint bg_red, jint bg_green,
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jint bg_blue, jint x, jint y, jboolean composite)
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{
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QImage *image = getQtImage(env, obj);
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assert( image );
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QPainter *painter = getPainter( env, graphics );
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assert( painter );
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if(composite == JNI_TRUE)
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painter->fillRect ( x, y, image->width(), image->height(),
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QColor(bg_red, bg_green, bg_blue ) );
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painter->drawImage ( QPoint(x, y), *image );
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}
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/*
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* Draw the image with scaling.
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*/
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JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtImage_drawPixelsScaled
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(JNIEnv *env, jobject obj, jobject graphics,
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jint bg_red, jint bg_green, jint bg_blue,
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jint x, jint y, jint w, jint h, jboolean composite)
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{
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QImage *image = getQtImage(env, obj);
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assert( image );
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QPainter *painter = getPainter( env, graphics );
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assert( painter );
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if(composite == JNI_TRUE)
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painter->fillRect ( x, y, w, h, QColor(bg_red, bg_green, bg_blue ) );
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QRectF *srcRect = new QRectF((qreal)0, (qreal)0,
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(qreal)image->width(), (qreal)image->height());
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QRectF *dstRect = new QRectF((qreal)x, (qreal)y,
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(qreal)w, (qreal)h);
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if(composite == JNI_TRUE)
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painter->fillRect( *dstRect, QColor(bg_red, bg_green, bg_blue ) );
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painter->drawImage( *dstRect, *image, *srcRect);
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delete srcRect;
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delete dstRect;
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}
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/*
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* Draws a transformed image.
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*/
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JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtImage_drawPixelsTransformed
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(JNIEnv *env, jobject obj, jobject graphics, jobject transform)
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{
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QImage *originalImage = getQtImage(env, obj);
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assert( originalImage );
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QPainter *painter = getPainter( env, graphics );
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assert( painter );
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QMatrix *matrix = (QMatrix *)getNativeObject(env, transform);
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assert( matrix );
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// FIXME : Add rendering hint support here.
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QPoint p = matrix->map( QPoint(0,0) );
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QImage image = originalImage->transformed ( *matrix, Qt::FastTransformation );
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painter->drawImage(p, image);
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}
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/**
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* Draws the pixbuf at x, y, scaled to width and height and
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* optionally composited and/or flipped with a given background color.
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*/
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JNIEXPORT void JNICALL
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Java_gnu_java_awt_peer_qt_QtImage_drawPixelsScaledFlipped
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(JNIEnv *env, jobject obj, jobject graphics,
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jint bg_red, jint bg_green, jint bg_blue,
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jboolean flipx, jboolean flipy,
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jint srcx, jint srcy, jint srcwidth, jint srcheight,
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jint dstx, jint dsty, jint dstwidth, jint dstheight,
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jboolean composite)
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{
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QImage *originalImage = getQtImage(env, obj);
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assert( originalImage );
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QPainter *painter = getPainter( env, graphics );
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assert( painter );
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QRectF *srcRect = new QRectF((qreal)srcx, (qreal)srcy,
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(qreal)srcwidth, (qreal)srcheight);
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QRectF *dstRect = new QRectF((qreal)dstx, (qreal)dsty,
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(qreal)dstwidth, (qreal)dstheight);
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QImage image;
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if( flipx == JNI_TRUE || flipy == JNI_TRUE)
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image = originalImage->mirrored ( (flipx == JNI_TRUE),
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(flipy == JNI_TRUE) );
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else
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image = *originalImage;
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if(composite == JNI_TRUE)
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painter->fillRect( *dstRect, QColor(bg_red, bg_green, bg_blue ) );
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painter->drawImage( *dstRect, image, *srcRect);
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delete srcRect;
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delete dstRect;
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}
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/**
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* Copies an area of the image (used by Graphics)
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*/
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JNIEXPORT void JNICALL Java_gnu_java_awt_peer_qt_QtImage_copyArea
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(JNIEnv *env, jobject obj , jint x, jint y, jint w, jint h, jint dx, jint dy)
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{
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QImage *image = getQtImage(env, obj);
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assert( image );
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QImage area = image->copy(x, y, w, h);
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QPainter *p = new QPainter( image );
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p->drawImage( x + dx, y + dy, area );
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delete p;
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}
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