| /* gtkimage.c |
| Copyright (C) 2005, 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| #include "jcl.h" |
| #include "gtkpeer.h" |
| #include <cairo-xlib.h> |
| #include <gdk/gdkx.h> |
| |
| #include "gnu_java_awt_peer_gtk_GtkImage.h" |
| |
| /* The constant fields in java.awt.Image */ |
| #define SCALE_DEFAULT 1 |
| #define SCALE_FAST 2 |
| #define SCALE_SMOOTH 4 |
| #define SCALE_REPLICATE 8 |
| #define SCALE_AREA_AVERAGING 16 |
| |
| /* local stuff */ |
| static GdkInterpType mapHints(jint hints); |
| static void createRawData (JNIEnv * env, jobject obj, void *ptr); |
| static void setWidthHeight (JNIEnv * env, jobject obj, int width, int height); |
| |
| /** |
| * Loads a pixbuf from a file. |
| */ |
| JNIEXPORT jboolean JNICALL |
| Java_gnu_java_awt_peer_gtk_GtkImage_loadPixbuf |
| (JNIEnv *env, jobject obj, jstring name) |
| { |
| const char *filename; |
| int width, height; |
| GdkPixbuf *pixbuf; |
| |
| /* Don't use the JCL convert function because it throws an exception |
| on failure */ |
| filename = (*env)->GetStringUTFChars (env, name, 0); |
| |
| if (filename == NULL) |
| return JNI_FALSE; |
| |
| pixbuf = gdk_pixbuf_new_from_file (filename, NULL); |
| if (pixbuf == NULL) |
| { |
| (*env)->ReleaseStringUTFChars (env, name, filename); |
| return JNI_FALSE; |
| } |
| |
| width = gdk_pixbuf_get_width (pixbuf); |
| height = gdk_pixbuf_get_height (pixbuf); |
| |
| createRawData (env, obj, pixbuf); |
| setWidthHeight(env, obj, width, height); |
| (*env)->ReleaseStringUTFChars (env, name, filename); |
| |
| return JNI_TRUE; |
| } |
| |
| /* |
| * Creates the image from an array of java bytes. |
| */ |
| JNIEXPORT jboolean JNICALL |
| Java_gnu_java_awt_peer_gtk_GtkImage_loadImageFromData |
| (JNIEnv *env, jobject obj, jbyteArray data) |
| { |
| jbyte *src; |
| GdkPixbuf* pixbuf; |
| GdkPixbufLoader* loader; |
| int len; |
| int width; |
| int height; |
| |
| src = (*env)->GetByteArrayElements (env, data, NULL); |
| len = (*env)->GetArrayLength (env, data); |
| |
| loader = gdk_pixbuf_loader_new (); |
| |
| gdk_pixbuf_loader_write (loader, (guchar *)src, len, NULL); |
| gdk_pixbuf_loader_close (loader, NULL); |
| |
| (*env)->ReleaseByteArrayElements (env, data, src, 0); |
| |
| pixbuf = gdk_pixbuf_loader_get_pixbuf (loader); |
| |
| if (pixbuf == NULL) |
| { |
| g_object_unref (loader); |
| createRawData (env, obj, NULL); |
| return JNI_FALSE; |
| } |
| |
| g_object_ref (pixbuf); |
| g_object_unref (loader); |
| |
| width = gdk_pixbuf_get_width (pixbuf); |
| height = gdk_pixbuf_get_height (pixbuf); |
| |
| createRawData (env, obj, pixbuf); |
| setWidthHeight(env, obj, width, height); |
| |
| return JNI_TRUE; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_gnu_java_awt_peer_gtk_GtkImage_createFromPixbuf |
| (JNIEnv *env, jobject obj) |
| { |
| int width, heigth; |
| GdkPixbuf *pixbuf = cp_gtk_image_get_pixbuf (env, obj); |
| width = gdk_pixbuf_get_width (pixbuf); |
| heigth = gdk_pixbuf_get_height (pixbuf); |
| setWidthHeight(env, obj, width, heigth); |
| } |
| |
| /** |
| * Returns a copy of the pixel data as a java array. |
| */ |
| JNIEXPORT jintArray JNICALL |
| Java_gnu_java_awt_peer_gtk_GtkImage_getPixels(JNIEnv *env, jobject obj) |
| { |
| GdkPixbuf *pixbuf; |
| int width, height, rowstride; |
| guchar *pixeldata; |
| jintArray result_array; |
| jint *result_array_iter, *dst; |
| int i,j; |
| |
| gdk_threads_enter (); |
| |
| pixbuf = cp_gtk_image_get_pixbuf (env, obj); |
| width = gdk_pixbuf_get_width (pixbuf); |
| height = gdk_pixbuf_get_height (pixbuf); |
| rowstride = gdk_pixbuf_get_rowstride (pixbuf); |
| |
| result_array = (*env)->NewIntArray (env, (width * height)); |
| if (result_array == NULL) |
| { |
| gdk_threads_leave (); |
| return NULL; |
| } |
| |
| dst = result_array_iter = |
| (*env)->GetIntArrayElements (env, result_array, NULL); |
| |
| |
| pixeldata = gdk_pixbuf_get_pixels (pixbuf); |
| |
| g_assert (gdk_pixbuf_get_bits_per_sample (pixbuf) == 8); |
| |
| if (gdk_pixbuf_get_has_alpha (pixbuf)) |
| { |
| for(i = 0 ; i < height; i++) |
| { |
| memcpy(dst, (void *)pixeldata, width * 4); |
| dst += width; |
| pixeldata += rowstride; |
| } |
| } else { |
| |
| /* Add a default alpha value of 0xFF to the pixeldata without alpha |
| information and keep it in the same format as the pixeldata with alpha |
| information. On Little Endian systems: AABBGGRR and on Big Endian |
| systems: RRGGBBAA. */ |
| |
| for(i = 0; i < height; i++) |
| { |
| for(j = 0; j < width; j++) |
| |
| #ifndef WORDS_BIGENDIAN |
| dst[j] = 0xFF000000 |
| | (pixeldata[j*3 + 2] & 0xFF) << 16 |
| | (pixeldata[j*3 + 1] & 0xFF) << 8 |
| | (pixeldata[j*3] & 0xFF); |
| #else |
| dst[j] = (pixeldata[j*3] & 0xFF) << 24 |
| | (pixeldata[j*3 + 1] & 0xFF) << 16 |
| | (pixeldata[j*3 + 2] & 0xFF) << 8 |
| | 0xFF; |
| #endif |
| dst += width; |
| pixeldata += rowstride; |
| } |
| } |
| |
| (*env)->ReleaseIntArrayElements (env, result_array, result_array_iter, 0); |
| |
| gdk_threads_leave (); |
| return result_array; |
| } |
| |
| /** |
| * Returns a copy of the pixel data as a java array. |
| * (GdkPixbuf only) |
| */ |
| JNIEXPORT void JNICALL |
| Java_gnu_java_awt_peer_gtk_GtkImage_setPixels(JNIEnv *env, jobject obj, |
| jintArray pixels) |
| { |
| GdkPixbuf *pixbuf = cp_gtk_image_get_pixbuf (env, obj); |
| int width, height, rowstride; |
| guchar *pixeldata; |
| jint *src_array_iter, *src; |
| int i; |
| |
| width = gdk_pixbuf_get_width (pixbuf); |
| height = gdk_pixbuf_get_height (pixbuf); |
| rowstride = gdk_pixbuf_get_rowstride (pixbuf); |
| |
| src = src_array_iter = |
| (*env)->GetIntArrayElements (env, pixels, NULL); |
| |
| pixeldata = gdk_pixbuf_get_pixels (pixbuf); |
| for(i = 0 ; i < height; i++) |
| { |
| memcpy((void *)pixeldata, (void *)src, width * 4); |
| src += width; |
| pixeldata += rowstride; |
| } |
| |
| (*env)->ReleaseIntArrayElements (env, pixels, src_array_iter, 0); |
| } |
| |
| /** |
| * Allocates a Gtk Pixbuf |
| */ |
| JNIEXPORT void JNICALL |
| Java_gnu_java_awt_peer_gtk_GtkImage_createPixbuf(JNIEnv *env, jobject obj) |
| { |
| int width, height; |
| jclass cls; |
| jfieldID field; |
| |
| cls = (*env)->GetObjectClass (env, obj); |
| field = (*env)->GetFieldID (env, cls, "width", "I"); |
| g_assert (field != 0); |
| width = (*env)->GetIntField (env, obj, field); |
| |
| field = (*env)->GetFieldID (env, cls, "height", "I"); |
| g_assert (field != 0); |
| height = (*env)->GetIntField (env, obj, field); |
| |
| createRawData (env, obj, gdk_pixbuf_new (GDK_COLORSPACE_RGB, |
| TRUE, |
| 8, |
| width, |
| height)); |
| } |
| |
| /** |
| * Allocates a Gtk Pixbuf |
| */ |
| JNIEXPORT void JNICALL |
| Java_gnu_java_awt_peer_gtk_GtkImage_initFromBuffer(JNIEnv *env, jobject obj, |
| jlong bufferPointer) |
| { |
| int width, height; |
| jclass cls; |
| jfieldID field; |
| GdkPixbuf *pixbuf; |
| const guchar *bp = JLONG_TO_PTR(const guchar, bufferPointer); |
| |
| g_assert(bp != NULL); |
| cls = (*env)->GetObjectClass( env, obj ); |
| field = (*env)->GetFieldID( env, cls, "width", "I" ); |
| g_assert( field != 0 ); |
| width = (*env)->GetIntField( env, obj, field ); |
| |
| field = (*env)->GetFieldID( env, cls, "height", "I" ); |
| g_assert( field != 0 ); |
| height = (*env)->GetIntField( env, obj, field ); |
| |
| pixbuf = gdk_pixbuf_new_from_data( bp, |
| GDK_COLORSPACE_RGB, TRUE, 8, |
| width, height, width * 4, NULL, NULL ); |
| g_assert( pixbuf != NULL ); |
| createRawData( env, obj, pixbuf ); |
| } |
| |
| /** |
| * Frees the Gtk Pixbuf. |
| */ |
| JNIEXPORT void JNICALL |
| Java_gnu_java_awt_peer_gtk_GtkImage_freePixbuf(JNIEnv *env, jobject obj) |
| { |
| gdk_pixbuf_unref (cp_gtk_image_get_pixbuf (env, obj)); |
| } |
| |
| /** |
| * Sets this to a scaled version of the original pixbuf |
| * width and height of the destination GtkImage must be set. |
| */ |
| JNIEXPORT void JNICALL |
| Java_gnu_java_awt_peer_gtk_GtkImage_createScaledPixbuf(JNIEnv *env, |
| jobject destination, |
| jobject source, |
| jint hints) |
| { |
| GdkPixbuf* dst; |
| int width, height; |
| jclass cls; |
| jfieldID field; |
| |
| GdkPixbuf *pixbuf; |
| |
| cls = (*env)->GetObjectClass (env, destination); |
| field = (*env)->GetFieldID (env, cls, "width", "I"); |
| g_assert (field != 0); |
| width = (*env)->GetIntField (env, destination, field); |
| |
| field = (*env)->GetFieldID (env, cls, "height", "I"); |
| g_assert (field != 0); |
| height = (*env)->GetIntField (env, destination, field); |
| |
| pixbuf = cp_gtk_image_get_pixbuf (env, source); |
| |
| dst = gdk_pixbuf_scale_simple(pixbuf, |
| width, height, |
| mapHints(hints)); |
| |
| createRawData (env, destination, (void *)dst); |
| } |
| |
| /** |
| * Used by GtkFramePeer |
| */ |
| GdkPixbuf *cp_gtk_image_get_pixbuf (JNIEnv *env, jobject obj) |
| { |
| jclass cls; |
| jfieldID data_fid; |
| jobject data; |
| |
| cls = (*env)->GetObjectClass (env, obj); |
| data_fid = (*env)->GetFieldID (env, cls, "pixbuf", |
| "Lgnu/classpath/Pointer;"); |
| g_assert (data_fid != 0); |
| data = (*env)->GetObjectField (env, obj, data_fid); |
| |
| return (GdkPixbuf *)JCL_GetRawData (env, data); |
| } |
| |
| /** |
| * Maps java.awt.Image scaling hints to the native GDK ones. |
| */ |
| static GdkInterpType mapHints(jint hints) |
| { |
| switch ( hints ) |
| { |
| /* For FAST, we use the nearest-neighbor. Fastest and lowest quality. */ |
| case SCALE_FAST: |
| case SCALE_REPLICATE: |
| return GDK_INTERP_NEAREST; |
| |
| /* Hyperbolic for smooth. Slowest too. */ |
| case SCALE_SMOOTH: |
| return GDK_INTERP_HYPER; |
| |
| /* the inbetweenish method */ |
| case SCALE_AREA_AVERAGING: |
| return GDK_INTERP_TILES; |
| |
| /* default to bilinear */ |
| } |
| return GDK_INTERP_BILINEAR; |
| } |
| |
| /* Sets the width and height fields of a GtkImage object. */ |
| static void setWidthHeight (JNIEnv * env, jobject obj, int width, int height) |
| { |
| jclass cls; |
| jfieldID field; |
| |
| cls = (*env)->GetObjectClass (env, obj); |
| g_assert (cls != 0); |
| field = (*env)->GetFieldID (env, cls, "width", "I"); |
| g_assert (field != 0); |
| (*env)->SetIntField (env, obj, field, (jint)width); |
| |
| field = (*env)->GetFieldID (env, cls, "height", "I"); |
| g_assert (field != 0); |
| (*env)->SetIntField (env, obj, field, (jint)height); |
| } |
| |
| /* Store and get the pixbuf pointer */ |
| static void |
| createRawData (JNIEnv * env, jobject obj, void *ptr) |
| { |
| jclass cls; |
| jobject data; |
| jfieldID data_fid; |
| |
| cls = (*env)->GetObjectClass (env, obj); |
| data_fid = (*env)->GetFieldID (env, cls, "pixbuf", |
| "Lgnu/classpath/Pointer;"); |
| g_assert (data_fid != 0); |
| |
| data = JCL_NewRawDataObject (env, ptr); |
| |
| (*env)->SetObjectField (env, obj, data_fid, data); |
| } |
| |