diff options
Diffstat (limited to 'native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoSurface.c')
-rw-r--r-- | native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoSurface.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoSurface.c b/native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoSurface.c new file mode 100644 index 000000000..1a618cef5 --- /dev/null +++ b/native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoSurface.c @@ -0,0 +1,311 @@ +/* gnu_java_awt_peer_gtk_CairoSurface.c + Copyright (C) 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_CairoSurface.h" +#include "cairographics2d.h" + +/** + * Field names in CairoSurface.java + */ +#define SURFACE "surfacePointer" +#define BUFFER "bufferPointer" + +/* prototypes */ +static void *getNativeObject( JNIEnv *env, jobject obj, const char *pointer ); +static void setNativeObject( JNIEnv *env, jobject obj, void *ptr, const char *pointer ); + +/** + * Creates a cairo surface, ARGB32, native ordering, premultiplied alpha. + */ +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_CairoSurface_create (JNIEnv *env, jobject obj, jint width, jint height, jint stride) +{ + cairo_surface_t* surface; + void *data = g_malloc(stride * height * 4); + memset(data, 0, stride * height * 4); + setNativeObject(env, obj, data, BUFFER); + + surface = cairo_image_surface_create_for_data + (data, CAIRO_FORMAT_ARGB32, width, height, stride); + + setNativeObject(env, obj, surface, SURFACE); +} + +/** + * Destroy the surface + */ +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_CairoSurface_destroy (JNIEnv *env, jobject obj) +{ + void *buffer; + cairo_surface_t* surface = (cairo_surface_t *)getNativeObject(env, obj, SURFACE); + if( surface != NULL ) + cairo_surface_destroy(surface); + + buffer = getNativeObject(env, obj, BUFFER); + if( buffer != NULL ) + g_free(buffer); +} + +/** + * Gets a pixel + */ +JNIEXPORT jint JNICALL +Java_gnu_java_awt_peer_gtk_CairoSurface_nativeGetElem (JNIEnv *env, jobject obj, jint i) +{ + jint *pixeldata = (jint *)getNativeObject(env, obj, BUFFER); + + if( pixeldata == NULL ) + return 0; + + return pixeldata[i]; +} + +/** + * Sets a pixel + */ +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_CairoSurface_nativeSetElem +(JNIEnv *env, jobject obj, jint i, jint val) +{ + jint *pixeldata = (jint *)getNativeObject(env, obj, BUFFER); + + if( pixeldata == NULL ) + return; + + pixeldata[i] = val; +} + +/** + * Gets all pixels in an array + */ +JNIEXPORT jintArray JNICALL +Java_gnu_java_awt_peer_gtk_CairoSurface_getPixels +(JNIEnv *env, jobject obj, int size) +{ + jint *pixeldata, *jpixdata; + jintArray jpixels; + + pixeldata = (jint *)getNativeObject(env, obj, BUFFER); + g_assert(pixeldata != NULL); + + jpixels = (*env)->NewIntArray (env, size); + jpixdata = (*env)->GetIntArrayElements (env, jpixels, NULL); + memcpy (jpixdata, pixeldata, size * sizeof( jint )); + + (*env)->ReleaseIntArrayElements (env, jpixels, jpixdata, 0); + return jpixels; +} + +/** + * Sets all pixels by an array. + */ +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_CairoSurface_setPixels +(JNIEnv *env, jobject obj, jintArray jpixels) +{ + jint *pixeldata, *jpixdata; + int size; + int width, height; + jclass cls; + jfieldID field; + + if( jpixels == NULL ) + return; + + 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); + + pixeldata = (jint *)getNativeObject(env, obj, BUFFER); + g_assert(pixeldata != NULL); + + jpixdata = (*env)->GetIntArrayElements (env, jpixels, NULL); + size = (*env)->GetArrayLength( env, jpixels ); + if( size > width * height ) size = width * height; /* stop overflows. */ + + memcpy (pixeldata, jpixdata, size * sizeof( jint )); + + (*env)->ReleaseIntArrayElements (env, jpixels, jpixdata, 0); +} + +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_CairoSurface_drawSurface + (JNIEnv *env, jobject obj, jobject context, jdoubleArray java_matrix) +{ + cairo_t *cr; + jdouble *native_matrix = NULL; + cairo_surface_t* surface = (cairo_surface_t *)getNativeObject(env, obj, SURFACE); + g_assert(surface != NULL); + + cr = cp_gtk_get_cairo_t(env, context); + g_assert(cr != NULL); + + native_matrix = (*env)->GetDoubleArrayElements (env, java_matrix, NULL); + g_assert (native_matrix != NULL); + g_assert ((*env)->GetArrayLength (env, java_matrix) == 6); + + { + cairo_matrix_t mat; + cairo_pattern_t *p; + cairo_matrix_init_identity (&mat); + cairo_matrix_init (&mat, + native_matrix[0], native_matrix[1], + native_matrix[2], native_matrix[3], + native_matrix[4], native_matrix[5]); + + p = cairo_pattern_create_for_surface (surface); + cairo_pattern_set_matrix (p, &mat); + + cairo_set_source(cr, p); + cairo_paint(cr); + } + + (*env)->ReleaseDoubleArrayElements (env, java_matrix, native_matrix, 0); +} + +JNIEXPORT jlong JNICALL +Java_gnu_java_awt_peer_gtk_CairoSurface_getFlippedBuffer +(JNIEnv *env, jobject obj, jint size) +{ + jint *dst; + jint *src = (jint *)getNativeObject(env, obj, BUFFER); + int i; + int t; + + g_assert( src != NULL ); + dst = g_malloc( size * sizeof( jint ) ); + + for(i = 0; i < size; i++ ) + { + t = (src[i] & 0x0000FF) << 16; + dst[i] = (src[i] & 0x00FF0000) >> 16; + dst[i] |= (src[i] & 0xFF00FF00); + dst[i] |= t; + } + + return PTR_TO_JLONG(dst); +} + +/** + * Create and return a cairo context for drawing to the surface. + */ +JNIEXPORT jlong JNICALL +Java_gnu_java_awt_peer_gtk_CairoSurface_newCairoContext (JNIEnv *env, jobject obj) +{ + cairo_surface_t* surface = (cairo_surface_t *)getNativeObject(env, obj, SURFACE); + cairo_t *ptr; + g_assert(surface != NULL); + ptr = cairo_create(surface); + g_assert(ptr != NULL); + + return PTR_TO_JLONG(ptr); +} + +/** + * copyArea. + */ +JNIEXPORT void JNICALL +Java_gnu_java_awt_peer_gtk_CairoSurface_copyAreaNative (JNIEnv *env, + jobject obj, + jint x, jint y, + jint w, jint h, + jint dx, jint dy, + jint stride) +{ + int row; + int srcOffset, dstOffset; + jint *temp; + jint *pixeldata = (jint *)getNativeObject(env, obj, BUFFER); + g_assert( pixeldata != NULL ); + + temp = g_malloc( h * w * 4 ); + g_assert( temp != NULL ); + + srcOffset = x + (y * stride); + dstOffset = (x + dx) + ((y + dy) * stride); + + for( row = 0; row < h; row++ ) + memcpy( temp + (w * row), pixeldata + srcOffset + (stride * row), w * 4 ); + + for( row = 0; row < h; row++ ) + memcpy( pixeldata + dstOffset + (stride * row), temp + (w * row), w * 4 ); + + g_free( temp ); +} + +/* + * Sets the native object field. + */ +static void +setNativeObject( JNIEnv *env, jobject obj, void *ptr, const char *pointer ) +{ + jclass cls; + jlong value; + jfieldID nofid; + cls = (*env)->GetObjectClass( env, obj ); + value = PTR_TO_JLONG(ptr); + nofid = (*env)->GetFieldID( env, cls, pointer, "J" ); + (*env)->SetLongField( env, obj, nofid, value ); + (*env)->DeleteLocalRef( env, cls ); +} + +/** + * Gets the native object field. + */ +static void * +getNativeObject( JNIEnv *env, jobject obj, const char *pointer ) +{ + jclass cls; + jlong value; + jfieldID nofid; + cls = (*env)->GetObjectClass( env, obj ); + nofid = (*env)->GetFieldID( env, cls, pointer, "J" ); + value = (*env)->GetLongField( env, obj, nofid ); + (*env)->DeleteLocalRef( env, cls ); + return JLONG_TO_PTR(void, value); +} |