| /* 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 "gnu_java_awt_peer_gtk_CairoSurface.h" |
| #include "cairographics2d.h" |
| |
| /** |
| * Field names in CairoSurface.java |
| */ |
| #define SURFACE "surfacePointer" |
| #define SHARED "sharedBuffer" |
| |
| /* prototypes */ |
| 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, |
| jintArray buf ) |
| { |
| cairo_surface_t* surface; |
| jboolean isCopy; |
| |
| /* Retrieve java-created data array */ |
| void *data = (*env)->GetIntArrayElements (env, buf, &isCopy); |
| |
| /* Set sharedBuffer variable */ |
| jclass cls = (*env)->GetObjectClass (env, obj); |
| jfieldID field = (*env)->GetFieldID (env, cls, SHARED, "Z"); |
| g_assert (field != 0); |
| |
| if (isCopy == JNI_TRUE) |
| { |
| (*env)->SetBooleanField (env, obj, field, JNI_FALSE); |
| void* temp = g_malloc(stride * height * 4); |
| memcpy(temp, data, stride * height * 4); |
| (*env)->ReleaseIntArrayElements (env, buf, data, 0); |
| data = temp; |
| } |
| else |
| (*env)->SetBooleanField (env, obj, field, JNI_TRUE); |
| |
| /* Create the cairo surface and set the java pointer */ |
| surface = cairo_image_surface_create_for_data |
| (data, CAIRO_FORMAT_ARGB32, width, height, stride * 4); |
| |
| setNativeObject(env, obj, surface, SURFACE); |
| } |
| |
| /** |
| * Destroy the surface |
| */ |
| JNIEXPORT void JNICALL |
| Java_gnu_java_awt_peer_gtk_CairoSurface_destroy |
| (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)), |
| jlong surfacePointer, jintArray buf) |
| { |
| cairo_surface_t* surface = JLONG_TO_PTR(void, surfacePointer); |
| void *data = cairo_image_surface_get_data(surface); |
| if( surface != NULL ) |
| { |
| /* Release or free the data buffer as appropriate */ |
| jclass cls = (*env)->GetObjectClass (env, obj); |
| jfieldID field = (*env)->GetFieldID (env, cls, SHARED, "Z"); |
| g_assert (field != 0); |
| jboolean sharedBuffer = (*env)->GetBooleanField (env, obj, field); |
| |
| if (sharedBuffer == JNI_TRUE) |
| (*env)->ReleaseIntArrayElements (env, buf, data, 0); |
| else |
| g_free(data); |
| |
| /* Destroy the cairo surface itself */ |
| cairo_surface_destroy(surface); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_gnu_java_awt_peer_gtk_CairoSurface_nativeDrawSurface |
| (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)), |
| jlong surfacePointer, jlong context, jdoubleArray java_matrix, double alpha, |
| jint interpolation) |
| { |
| struct cairographics2d *gr = JLONG_TO_PTR(struct cairographics2d, context); |
| cairo_t *cr = gr->cr; |
| jdouble *native_matrix = NULL; |
| cairo_surface_t* surface = JLONG_TO_PTR(void, surfacePointer); |
| g_assert(surface != NULL); |
| 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); |
| switch ((enum java_awt_rendering_hints_filter) interpolation) |
| { |
| case java_awt_rendering_hints_VALUE_INTERPOLATION_NEAREST_NEIGHBOR: |
| cairo_pattern_set_filter (p, CAIRO_FILTER_NEAREST); |
| break; |
| case java_awt_rendering_hints_VALUE_INTERPOLATION_BILINEAR: |
| cairo_pattern_set_filter (p, CAIRO_FILTER_BILINEAR); |
| break; |
| case java_awt_rendering_hints_VALUE_INTERPOLATION_BICUBIC: |
| cairo_pattern_set_filter (p, CAIRO_FILTER_GAUSSIAN); |
| break; |
| case java_awt_rendering_hints_VALUE_ALPHA_INTERPOLATION_SPEED: |
| cairo_pattern_set_filter (p, CAIRO_FILTER_FAST); |
| break; |
| case java_awt_rendering_hints_VALUE_ALPHA_INTERPOLATION_DEFAULT: |
| cairo_pattern_set_filter (p, CAIRO_FILTER_NEAREST); |
| break; |
| case java_awt_rendering_hints_VALUE_ALPHA_INTERPOLATION_QUALITY: |
| cairo_pattern_set_filter (p, CAIRO_FILTER_BEST); |
| break; |
| } |
| |
| cairo_set_source(cr, p); |
| if (alpha == 1.0) |
| cairo_paint(cr); |
| else |
| cairo_paint_with_alpha(cr, alpha); |
| |
| cairo_pattern_destroy(p); |
| } |
| |
| (*env)->ReleaseDoubleArrayElements (env, java_matrix, native_matrix, 0); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_gnu_java_awt_peer_gtk_CairoSurface_getFlippedBuffer |
| (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)), |
| jlong surfacePointer) |
| { |
| cairo_surface_t* surface; |
| jint *src; |
| jint *dst; |
| int i, t, width, height; |
| jclass cls; |
| jfieldID field; |
| |
| /* Retrieve pointer to cairo data buffer */ |
| surface = JLONG_TO_PTR(void, surfacePointer); |
| src = (jint*)cairo_image_surface_get_data(surface); |
| |
| /* Retrieve dimensions of surface, from java fields */ |
| 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); |
| |
| /* Create destination array */ |
| g_assert( src != NULL ); |
| dst = g_malloc( width * height * sizeof( jint ) ); |
| |
| /* Copy data into destination array, reversing sample order of each pixel */ |
| for(i = 0; i < (height * width); 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_nativeNewCairoContext |
| (JNIEnv *env __attribute((unused)), jobject obj __attribute((unused)), |
| jlong surfacePointer) |
| { |
| cairo_surface_t* surface = JLONG_TO_PTR(cairo_surface_t, surfacePointer); |
| 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_copyAreaNative2 |
| (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)), |
| jlong surfacePointer, |
| jint x, jint y, jint w, jint h, jint dx, jint dy, jint stride) |
| { |
| int row; |
| int srcOffset, dstOffset; |
| jint *temp; |
| |
| /* Retrieve pointer to cairo data buffer */ |
| cairo_surface_t* surface = JLONG_TO_PTR(void, surfacePointer); |
| jint *pixeldata = (jint*)cairo_image_surface_get_data(surface); |
| g_assert( pixeldata != NULL ); |
| |
| /* Create temporary buffer and calculate offsets */ |
| temp = g_malloc( h * w * 4 ); |
| g_assert( temp != NULL ); |
| |
| srcOffset = x + (y * stride); |
| dstOffset = (x + dx) + ((y + dy) * stride); |
| |
| /* Copy desired region into temporary buffer */ |
| for( row = 0; row < h; row++ ) |
| memcpy( temp + (w * row), pixeldata + srcOffset + (stride * row), w * 4 ); |
| |
| /* Copy out of buffer and to destination */ |
| for( row = 0; row < h; row++ ) |
| memcpy( pixeldata + dstOffset + (stride * row), temp + (w * row), w * 4 ); |
| |
| g_free( temp ); |
| } |
| |
| /* |
| * Synchronizes the java and native data buffers, copying any changes made in |
| * the java array into the native array. |
| * This method should only be called if (sharedBuffer == false). |
| */ |
| JNIEXPORT void JNICALL |
| Java_gnu_java_awt_peer_gtk_CairoSurface_syncJavaToNative |
| (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)), |
| jlong surfacePointer, jintArray buffer) |
| { |
| /* Get size of java array */ |
| int size = (*env)->GetArrayLength(env, buffer); |
| |
| /* Get native data buffer */ |
| cairo_surface_t* surface = JLONG_TO_PTR(void, surfacePointer); |
| g_assert(surface != NULL); |
| void* nativeBuffer = cairo_image_surface_get_data(surface); |
| |
| /* Sync buffers */ |
| (*env)->GetIntArrayRegion(env, buffer, 0, size, nativeBuffer); |
| } |
| |
| /* |
| * Synchronizes the java and native data buffers, copying any changes made in |
| * the native array into the java array. |
| * This method should only be called if (sharedBuffer == false). |
| */ |
| JNIEXPORT void JNICALL |
| Java_gnu_java_awt_peer_gtk_CairoSurface_syncNativeToJava |
| (JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)), |
| jlong surfacePointer, jintArray buffer) |
| { |
| /* Get size of java array */ |
| int size = (*env)->GetArrayLength(env, buffer); |
| |
| /* Get native data buffer */ |
| cairo_surface_t* surface = JLONG_TO_PTR(void, surfacePointer); |
| g_assert(surface != NULL); |
| void* nativeBuffer = cairo_image_surface_get_data(surface); |
| |
| /* Sync buffers */ |
| (*env)->SetIntArrayRegion(env, buffer, 0, size, nativeBuffer); |
| } |
| |
| /* |
| * 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 ); |
| } |