diff options
Diffstat (limited to 'libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkPixbufDecoder.c')
| -rw-r--r-- | libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkPixbufDecoder.c | 515 |
1 files changed, 515 insertions, 0 deletions
diff --git a/libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkPixbufDecoder.c b/libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkPixbufDecoder.c new file mode 100644 index 00000000000..648cd6603d1 --- /dev/null +++ b/libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkPixbufDecoder.c @@ -0,0 +1,515 @@ +/* gdkpixbufdecoder.c + Copyright (C) 1999, 2003, 2004, 2005 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 <gtkpeer.h> +#include <gdk/gdk.h> +#include <gdk-pixbuf/gdk-pixbuf.h> +#include <gdk-pixbuf/gdk-pixbuf-loader.h> + +#include <jni.h> +#include <jcl.h> +#include "native_state.h" +#include "gnu_java_awt_peer_gtk_GdkPixbufDecoder.h" + +#include <string.h> +#include <stdlib.h> + +static struct state_table *native_pixbufdecoder_state_table; + +#define NSA_PB_INIT(env, clazz) \ + native_pixbufdecoder_state_table = cp_gtk_init_state_table (env, clazz) + +#define NSA_GET_PB_PTR(env, obj) \ + cp_gtk_get_state (env, obj, native_pixbufdecoder_state_table) + +#define NSA_SET_PB_PTR(env, obj, ptr) \ + cp_gtk_set_state (env, obj, native_pixbufdecoder_state_table, (void *)ptr) + +#define NSA_DEL_PB_PTR(env, obj) \ + cp_gtk_remove_state_slot (env, obj, native_pixbufdecoder_state_table) + +/* Union used for type punning. */ +union env_union +{ + void **void_env; + JNIEnv **jni_env; +}; + +static JavaVM *vm; + +static jmethodID areaPreparedID; +static jmethodID areaUpdatedID; +static jmethodID dataOutputWriteID; +static jmethodID registerFormatID; + +static void +area_prepared_cb (GdkPixbufLoader *loader, + jobject *decoder) +{ + JNIEnv *env = NULL; + union env_union e; + jint width = 0; + jint height = 0; + GdkPixbuf *pixbuf = NULL; + + pixbuf = gdk_pixbuf_loader_get_pixbuf (loader); + g_assert (pixbuf != NULL); + + width = gdk_pixbuf_get_width (pixbuf); + height = gdk_pixbuf_get_height (pixbuf); + + g_assert (decoder != NULL); + + e.jni_env = &env; + (*vm)->GetEnv (vm, e.void_env, JNI_VERSION_1_1); + + gdk_threads_leave (); + + (*env)->CallVoidMethod (env, + *decoder, + areaPreparedID, + width, height); + + gdk_threads_enter (); +} + +static void +area_updated_cb (GdkPixbufLoader *loader, + gint x, gint y, + gint width, gint height, + jobject *decoder) +{ + JNIEnv *env; + union env_union e; + jint stride_bytes, stride_pixels, n_channels, n_pixels; + jintArray jpixels; + jint *java_pixels; + guchar *gdk_pixels; + + GdkPixbuf *pixbuf_no_alpha = NULL; + GdkPixbuf *pixbuf = NULL; + +#ifndef WORDS_BIGENDIAN + int i; +#endif + + pixbuf_no_alpha = gdk_pixbuf_loader_get_pixbuf (loader); + if (pixbuf_no_alpha == NULL) + return; + + pixbuf = gdk_pixbuf_add_alpha(pixbuf_no_alpha, FALSE, 0, 0, 0); + g_assert (gdk_pixbuf_get_has_alpha (pixbuf)); + + stride_bytes = gdk_pixbuf_get_rowstride (pixbuf); + n_channels = gdk_pixbuf_get_n_channels (pixbuf); + stride_pixels = stride_bytes / n_channels; + n_pixels = height * stride_pixels; + gdk_pixels = gdk_pixbuf_get_pixels (pixbuf); + + e.jni_env = &env; + (*vm)->GetEnv (vm, e.void_env, JNI_VERSION_1_1); + + gdk_threads_leave (); + + jpixels = (*env)->NewIntArray (env, n_pixels); + + gdk_threads_enter (); + + java_pixels = (*env)->GetIntArrayElements (env, jpixels, NULL); + + memcpy (java_pixels, + gdk_pixels + (y * stride_bytes), + (height * stride_bytes)); + +#ifndef WORDS_BIGENDIAN + /* convert pixels from 0xBBGGRRAA to 0xAARRGGBB */ + for (i = 0; i < n_pixels; ++i) + { + java_pixels[i] = SWAPU32 ((unsigned)java_pixels[i]); + } +#endif + + g_object_unref (pixbuf); + + gdk_threads_leave (); + + (*env)->ReleaseIntArrayElements (env, jpixels, java_pixels, 0); + + (*env)->CallVoidMethod (env, + *decoder, + areaUpdatedID, + (jint) x, (jint) y, + (jint) width, (jint) height, + jpixels, + stride_pixels); + + (*env)->DeleteLocalRef(env, jpixels); + + gdk_threads_enter (); +} + +static void +closed_cb (GdkPixbufLoader *loader __attribute__((unused)), jobject *decoder) +{ + JNIEnv *env; + union env_union e; + e.jni_env = &env; + (*vm)->GetEnv (vm, e.void_env, JNI_VERSION_1_1); + + gdk_threads_leave (); + + (*env)->DeleteGlobalRef (env, *decoder); + g_free (decoder); + + gdk_threads_enter (); +} + + + +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_GdkPixbufDecoder_initState + (JNIEnv *env, jobject obj) +{ + GdkPixbufLoader *loader = NULL; + jobject *decoder = NULL; + + gdk_threads_enter (); + + decoder = (jobject *) g_malloc (sizeof (jobject)); + g_assert (decoder != NULL); + *decoder = (*env)->NewGlobalRef (env, obj); + + loader = gdk_pixbuf_loader_new (); + g_assert (loader != NULL); + g_signal_connect (loader, "area-prepared", G_CALLBACK (area_prepared_cb), decoder); + g_signal_connect (loader, "area-updated", G_CALLBACK (area_updated_cb), decoder); + g_signal_connect (loader, "closed", G_CALLBACK (closed_cb), decoder); + + NSA_SET_PB_PTR (env, obj, loader); + + gdk_threads_leave (); +} + +static void +query_formats (JNIEnv *env, jclass clazz) +{ + jobject jformat; + GSList *formats, *f; + GdkPixbufFormat *format; + char **ch, *name; + + jclass formatClass; + jmethodID addExtensionID; + jmethodID addMimeTypeID; + jobject string; + + formatClass = (*env)->FindClass + (env, "gnu/java/awt/peer/gtk/GdkPixbufDecoder$ImageFormatSpec"); + + g_assert(formatClass != NULL); + + addExtensionID = (*env)->GetMethodID (env, formatClass, + "addExtension", + "(Ljava/lang/String;)V"); + + addMimeTypeID = (*env)->GetMethodID (env, formatClass, + "addMimeType", + "(Ljava/lang/String;)V"); + + formats = gdk_pixbuf_get_formats (); + + for (f = formats; f; f = f->next) + { + format = (GdkPixbufFormat *) f->data; + name = gdk_pixbuf_format_get_name(format); + + string = (*env)->NewStringUTF(env, name); + g_assert(string != NULL); + + jformat = (*env)->CallStaticObjectMethod + (env, clazz, registerFormatID, string, + (jboolean) gdk_pixbuf_format_is_writable(format)); + (*env)->DeleteLocalRef(env, string); + + g_assert(jformat != NULL); + + ch = gdk_pixbuf_format_get_extensions(format); + while (*ch) + { + string = (*env)->NewStringUTF(env, *ch); + g_assert(string != NULL); + (*env)->CallVoidMethod (env, jformat, addExtensionID, string); + (*env)->DeleteLocalRef(env, string); + ++ch; + } + + ch = gdk_pixbuf_format_get_mime_types(format); + while (*ch) + { + string = (*env)->NewStringUTF(env, *ch); + g_assert(string != NULL); + (*env)->CallVoidMethod (env, jformat, addMimeTypeID, string); + (*env)->DeleteLocalRef(env, string); + ++ch; + } + } + + g_slist_free(formats); +} + + +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_GdkPixbufDecoder_initStaticState + (JNIEnv *env, jclass clazz) +{ + jclass dataOutputClass; + + (*env)->GetJavaVM(env, &vm); + + areaPreparedID = (*env)->GetMethodID (env, clazz, + "areaPrepared", + "(II)V"); + + areaUpdatedID = (*env)->GetMethodID (env, clazz, + "areaUpdated", + "(IIII[II)V"); + + registerFormatID = (*env)->GetStaticMethodID + (env, clazz, + "registerFormat", + "(Ljava/lang/String;Z)" + "Lgnu/java/awt/peer/gtk/GdkPixbufDecoder$ImageFormatSpec;"); + + + dataOutputClass = (*env)->FindClass(env, "java/io/DataOutput"); + dataOutputWriteID = (*env)->GetMethodID (env, dataOutputClass, + "write", "([B)V"); + + query_formats (env, clazz); + + NSA_PB_INIT (env, clazz); +} + + +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_GdkPixbufDecoder_finish +(JNIEnv *env, jobject obj, jboolean needs_close) +{ + GdkPixbufLoader *loader = NULL; + + gdk_threads_enter (); + + loader = (GdkPixbufLoader *)NSA_DEL_PB_PTR (env, obj); + if (loader == NULL) + return; + + if (needs_close) + gdk_pixbuf_loader_close (loader, NULL); + g_object_unref (loader); + + gdk_threads_leave (); +} + +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_GdkPixbufDecoder_pumpDone +(JNIEnv *env, jobject obj) +{ + GError *err = NULL; + GdkPixbufLoader *loader = NULL; + + gdk_threads_enter (); + + loader = (GdkPixbufLoader *)NSA_GET_PB_PTR (env, obj); + g_assert (loader != NULL); + + gdk_pixbuf_loader_close (loader, &err); + + if (err != NULL) + { + JCL_ThrowException (env, "java/io/IOException", err->message); + g_error_free (err); + } + + gdk_threads_leave (); +} + +struct stream_save_request +{ + JNIEnv *env; + jobject *stream; +}; + +static gboolean +save_to_stream(const gchar *buf, + gsize count, + GError **error __attribute__((unused)), + gpointer data) +{ + struct stream_save_request *ssr = (struct stream_save_request *)data; + + jbyteArray jbuf; + jbyte *cbuf; + + gdk_threads_leave (); + + jbuf = (*(ssr->env))->NewByteArray ((ssr->env), count); + cbuf = (*(ssr->env))->GetByteArrayElements ((ssr->env), jbuf, NULL); + memcpy (cbuf, buf, count); + (*(ssr->env))->ReleaseByteArrayElements ((ssr->env), jbuf, cbuf, 0); + (*(ssr->env))->CallVoidMethod ((ssr->env), *(ssr->stream), + dataOutputWriteID, jbuf); + + gdk_threads_enter (); + + return TRUE; +} + + +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_GdkPixbufDecoder_streamImage +(JNIEnv *env, jclass clazz __attribute__((unused)), + jintArray jarr, jstring jenctype, jint width, jint height, + jboolean hasAlpha, jobject stream) +{ + GdkPixbuf* pixbuf; + jint *ints; + guchar a, r, g, b, *pix, *p; + GError *err = NULL; + const char *enctype; + int i; + struct stream_save_request ssr; + + gdk_threads_enter (); + + ssr.stream = &stream; + ssr.env = env; + + ints = (*env)->GetIntArrayElements (env, jarr, NULL); + pix = g_malloc(width * height * (hasAlpha ? 4 : 3)); + + enctype = (*env)->GetStringUTFChars (env, jenctype, NULL); + g_assert(enctype != NULL); + + g_assert (pix != NULL); + g_assert (ints != NULL); + + p = pix; + for (i = 0; i < width*height; ++i) + { + /* + * Java encodes pixels as integers in a predictable arithmetic order: + * 0xAARRGGBB. Since these are jints, JNI has already byte-swapped + * them for us if necessary, so they're in "our" endianness, whatever + * that is. It uses 4 bytes per pixel whether or not there's an alpha + * channel. + */ + + a = 0xff & (ints[i] >> 24); + r = 0xff & (ints[i] >> 16); + g = 0xff & (ints[i] >> 8); + b = 0xff & ints[i]; + + /* + * GDK-pixbuf has a very different storage model: + * + * - A different alpha order (alpha after colors). + * - A different packing model (no alpha -> 3-bytes-per-pixel). + * - A different "RGB" order (host memory order, not endian-neutral). + */ + + *p++ = r; + *p++ = g; + *p++ = b; + if (hasAlpha) + *p++ = a; + } + + pixbuf = gdk_pixbuf_new_from_data (pix, + GDK_COLORSPACE_RGB, + (gboolean) hasAlpha, + 8, width, height, + width * (hasAlpha ? 4 : 3), /* rowstride */ + NULL, NULL); + g_assert (pixbuf != NULL); + + g_assert(gdk_pixbuf_save_to_callback (pixbuf, + &save_to_stream, + &ssr, + enctype, + &err, NULL)); + + g_object_unref (pixbuf); + + g_free(pix); + + (*env)->ReleaseStringUTFChars (env, jenctype, enctype); + (*env)->ReleaseIntArrayElements (env, jarr, ints, 0); + + gdk_threads_leave (); +} + + +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_GdkPixbufDecoder_pumpBytes + (JNIEnv *env, jobject obj, jbyteArray jarr, jint len) +{ + GdkPixbufLoader *loader = NULL; + jbyte *bytes = NULL; + GError *err = NULL; + + gdk_threads_enter (); + + g_assert (len >= 1); + g_assert (jarr != NULL); + + bytes = (*env)->GetByteArrayElements (env, jarr, NULL); + g_assert (bytes != NULL); + loader = (GdkPixbufLoader *)NSA_GET_PB_PTR (env, obj); + g_assert (loader != NULL); + + gdk_pixbuf_loader_write (loader, (const guchar *) bytes, len, &err); + + (*env)->ReleaseByteArrayElements (env, jarr, bytes, 0); + + if (err != NULL) + { + JCL_ThrowException (env, "java/io/IOException", err->message); + g_error_free (err); + } + + gdk_threads_leave (); +} |
