diff options
Diffstat (limited to 'libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkImage.c')
| -rw-r--r-- | libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkImage.c | 434 |
1 files changed, 434 insertions, 0 deletions
diff --git a/libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkImage.c b/libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkImage.c new file mode 100644 index 000000000..c2fbba212 --- /dev/null +++ b/libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkImage.c @@ -0,0 +1,434 @@ +/* gtkimage.c + Copyright (C) 2005, 2006, 2007 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 "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); + + if (data == NULL) + return NULL; + + 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); +} + |