334 lines
11 KiB
C
334 lines
11 KiB
C
/* gnu_java_awt_peer_gtk_CairoSurface.c
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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#include "jcl.h"
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#include "gtkpeer.h"
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#include "gnu_java_awt_peer_gtk_CairoSurface.h"
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#include "cairographics2d.h"
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/**
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* Field names in CairoSurface.java
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*/
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#define SURFACE "surfacePointer"
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#define SHARED "sharedBuffer"
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/* prototypes */
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static void setNativeObject( JNIEnv *env, jobject obj, void *ptr, const char *pointer );
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/**
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* Creates a cairo surface, ARGB32, native ordering, premultiplied alpha.
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*/
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JNIEXPORT void JNICALL
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Java_gnu_java_awt_peer_gtk_CairoSurface_create
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(JNIEnv *env, jobject obj, jint width, jint height, jint stride,
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jintArray buf )
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{
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cairo_surface_t* surface;
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jboolean isCopy;
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/* Retrieve java-created data array */
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void *data = (*env)->GetIntArrayElements (env, buf, &isCopy);
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/* Set sharedBuffer variable */
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jclass cls = (*env)->GetObjectClass (env, obj);
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jfieldID field = (*env)->GetFieldID (env, cls, SHARED, "Z");
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g_assert (field != 0);
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if (isCopy == JNI_TRUE)
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{
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(*env)->SetBooleanField (env, obj, field, JNI_FALSE);
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void* temp = g_malloc(stride * height * 4);
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memcpy(temp, data, stride * height * 4);
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(*env)->ReleaseIntArrayElements (env, buf, data, 0);
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data = temp;
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}
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else
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(*env)->SetBooleanField (env, obj, field, JNI_TRUE);
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/* Create the cairo surface and set the java pointer */
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surface = cairo_image_surface_create_for_data
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(data, CAIRO_FORMAT_ARGB32, width, height, stride * 4);
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setNativeObject(env, obj, surface, SURFACE);
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}
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/**
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* Destroy the surface
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*/
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JNIEXPORT void JNICALL
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Java_gnu_java_awt_peer_gtk_CairoSurface_destroy
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(JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)),
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jlong surfacePointer, jintArray buf)
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{
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cairo_surface_t* surface = JLONG_TO_PTR(void, surfacePointer);
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void *data = cairo_image_surface_get_data(surface);
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if( surface != NULL )
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{
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/* Release or free the data buffer as appropriate */
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jclass cls = (*env)->GetObjectClass (env, obj);
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jfieldID field = (*env)->GetFieldID (env, cls, SHARED, "Z");
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g_assert (field != 0);
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jboolean sharedBuffer = (*env)->GetBooleanField (env, obj, field);
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if (sharedBuffer == JNI_TRUE)
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(*env)->ReleaseIntArrayElements (env, buf, data, 0);
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else
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g_free(data);
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/* Destroy the cairo surface itself */
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cairo_surface_destroy(surface);
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}
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}
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JNIEXPORT void JNICALL
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Java_gnu_java_awt_peer_gtk_CairoSurface_nativeDrawSurface
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(JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)),
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jlong surfacePointer, jlong context, jdoubleArray java_matrix, double alpha,
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jint interpolation)
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{
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struct cairographics2d *gr = JLONG_TO_PTR(struct cairographics2d, context);
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cairo_t *cr = gr->cr;
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jdouble *native_matrix = NULL;
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cairo_surface_t* surface = JLONG_TO_PTR(void, surfacePointer);
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g_assert(surface != NULL);
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g_assert(cr != NULL);
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native_matrix = (*env)->GetDoubleArrayElements (env, java_matrix, NULL);
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g_assert (native_matrix != NULL);
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g_assert ((*env)->GetArrayLength (env, java_matrix) == 6);
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{
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cairo_matrix_t mat;
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cairo_pattern_t *p;
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cairo_matrix_init_identity (&mat);
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cairo_matrix_init (&mat,
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native_matrix[0], native_matrix[1],
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native_matrix[2], native_matrix[3],
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native_matrix[4], native_matrix[5]);
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p = cairo_pattern_create_for_surface (surface);
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cairo_pattern_set_matrix (p, &mat);
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switch ((enum java_awt_rendering_hints_filter) interpolation)
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{
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case java_awt_rendering_hints_VALUE_INTERPOLATION_NEAREST_NEIGHBOR:
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cairo_pattern_set_filter (p, CAIRO_FILTER_NEAREST);
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break;
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case java_awt_rendering_hints_VALUE_INTERPOLATION_BILINEAR:
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cairo_pattern_set_filter (p, CAIRO_FILTER_BILINEAR);
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break;
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case java_awt_rendering_hints_VALUE_INTERPOLATION_BICUBIC:
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cairo_pattern_set_filter (p, CAIRO_FILTER_GAUSSIAN);
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break;
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case java_awt_rendering_hints_VALUE_ALPHA_INTERPOLATION_SPEED:
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cairo_pattern_set_filter (p, CAIRO_FILTER_FAST);
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break;
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case java_awt_rendering_hints_VALUE_ALPHA_INTERPOLATION_DEFAULT:
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cairo_pattern_set_filter (p, CAIRO_FILTER_NEAREST);
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break;
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case java_awt_rendering_hints_VALUE_ALPHA_INTERPOLATION_QUALITY:
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cairo_pattern_set_filter (p, CAIRO_FILTER_BEST);
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break;
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}
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cairo_set_source(cr, p);
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if (alpha == 1.0)
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cairo_paint(cr);
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else
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cairo_paint_with_alpha(cr, alpha);
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cairo_pattern_destroy(p);
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}
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(*env)->ReleaseDoubleArrayElements (env, java_matrix, native_matrix, 0);
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}
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JNIEXPORT jlong JNICALL
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Java_gnu_java_awt_peer_gtk_CairoSurface_getFlippedBuffer
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(JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)),
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jlong surfacePointer)
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{
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cairo_surface_t* surface;
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jint *src;
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jint *dst;
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int i, t, width, height;
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jclass cls;
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jfieldID field;
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/* Retrieve pointer to cairo data buffer */
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surface = JLONG_TO_PTR(void, surfacePointer);
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src = (jint*)cairo_image_surface_get_data(surface);
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/* Retrieve dimensions of surface, from java fields */
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cls = (*env)->GetObjectClass (env, obj);
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field = (*env)->GetFieldID (env, cls, "width", "I");
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g_assert (field != 0);
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width = (*env)->GetIntField (env, obj, field);
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field = (*env)->GetFieldID (env, cls, "height", "I");
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g_assert (field != 0);
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height = (*env)->GetIntField (env, obj, field);
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/* Create destination array */
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g_assert( src != NULL );
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dst = g_malloc( width * height * sizeof( jint ) );
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/* Copy data into destination array, reversing sample order of each pixel */
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for(i = 0; i < (height * width); i++ )
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{
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t = (src[i] & 0x0000FF) << 16;
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dst[i] = (src[i] & 0x00FF0000) >> 16;
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dst[i] |= (src[i] & 0xFF00FF00);
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dst[i] |= t;
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}
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return PTR_TO_JLONG(dst);
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}
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/**
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* Create and return a cairo context for drawing to the surface.
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*/
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JNIEXPORT jlong JNICALL
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Java_gnu_java_awt_peer_gtk_CairoSurface_nativeNewCairoContext
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(JNIEnv *env __attribute((unused)), jobject obj __attribute((unused)),
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jlong surfacePointer)
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{
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cairo_surface_t* surface = JLONG_TO_PTR(cairo_surface_t, surfacePointer);
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cairo_t *ptr;
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g_assert(surface != NULL);
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ptr = cairo_create(surface);
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g_assert(ptr != NULL);
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return PTR_TO_JLONG(ptr);
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}
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/**
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* copyArea.
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*/
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JNIEXPORT void JNICALL
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Java_gnu_java_awt_peer_gtk_CairoSurface_copyAreaNative2
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(JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)),
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jlong surfacePointer,
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jint x, jint y, jint w, jint h, jint dx, jint dy, jint stride)
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{
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int row;
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int srcOffset, dstOffset;
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jint *temp;
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/* Retrieve pointer to cairo data buffer */
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cairo_surface_t* surface = JLONG_TO_PTR(void, surfacePointer);
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jint *pixeldata = (jint*)cairo_image_surface_get_data(surface);
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g_assert( pixeldata != NULL );
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/* Create temporary buffer and calculate offsets */
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temp = g_malloc( h * w * 4 );
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g_assert( temp != NULL );
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srcOffset = x + (y * stride);
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dstOffset = (x + dx) + ((y + dy) * stride);
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/* Copy desired region into temporary buffer */
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for( row = 0; row < h; row++ )
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memcpy( temp + (w * row), pixeldata + srcOffset + (stride * row), w * 4 );
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/* Copy out of buffer and to destination */
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for( row = 0; row < h; row++ )
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memcpy( pixeldata + dstOffset + (stride * row), temp + (w * row), w * 4 );
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g_free( temp );
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}
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/*
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* Synchronizes the java and native data buffers, copying any changes made in
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* the java array into the native array.
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* This method should only be called if (sharedBuffer == false).
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*/
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JNIEXPORT void JNICALL
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Java_gnu_java_awt_peer_gtk_CairoSurface_syncJavaToNative
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(JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)),
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jlong surfacePointer, jintArray buffer)
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{
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/* Get size of java array */
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int size = (*env)->GetArrayLength(env, buffer);
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/* Get native data buffer */
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cairo_surface_t* surface = JLONG_TO_PTR(void, surfacePointer);
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g_assert(surface != NULL);
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void* nativeBuffer = cairo_image_surface_get_data(surface);
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/* Sync buffers */
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(*env)->GetIntArrayRegion(env, buffer, 0, size, nativeBuffer);
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}
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/*
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* Synchronizes the java and native data buffers, copying any changes made in
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* the native array into the java array.
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* This method should only be called if (sharedBuffer == false).
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*/
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JNIEXPORT void JNICALL
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Java_gnu_java_awt_peer_gtk_CairoSurface_syncNativeToJava
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(JNIEnv *env __attribute__((unused)), jobject obj __attribute__((unused)),
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jlong surfacePointer, jintArray buffer)
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{
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/* Get size of java array */
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int size = (*env)->GetArrayLength(env, buffer);
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/* Get native data buffer */
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cairo_surface_t* surface = JLONG_TO_PTR(void, surfacePointer);
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g_assert(surface != NULL);
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void* nativeBuffer = cairo_image_surface_get_data(surface);
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/* Sync buffers */
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(*env)->SetIntArrayRegion(env, buffer, 0, size, nativeBuffer);
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}
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/*
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* Sets the native object field.
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*/
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static void
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setNativeObject( JNIEnv *env, jobject obj, void *ptr, const char *pointer )
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{
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jclass cls;
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jlong value;
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jfieldID nofid;
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cls = (*env)->GetObjectClass( env, obj );
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value = PTR_TO_JLONG(ptr);
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nofid = (*env)->GetFieldID( env, cls, pointer, "J" );
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(*env)->SetLongField( env, obj, nofid, value );
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(*env)->DeleteLocalRef( env, cls );
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}
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