1/*
2 * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#import "CGLGraphicsConfig.h"
27#import "CGLLayer.h"
28#import "ThreadUtilities.h"
29#import "LWCToolkit.h"
30#import "CGLSurfaceData.h"
31#import "JNIUtilities.h"
32
33
34extern NSOpenGLPixelFormat *sharedPixelFormat;
35extern NSOpenGLContext *sharedContext;
36
37@implementation CGLLayer
38
39@synthesize javaLayer;
40@synthesize textureID;
41@synthesize target;
42@synthesize textureWidth;
43@synthesize textureHeight;
44
45- (id) initWithJavaLayer:(jobject)layer;
46{
47AWT_ASSERT_APPKIT_THREAD;
48    // Initialize ourselves
49    self = [super init];
50    if (self == nil) return self;
51
52    self.javaLayer = layer;
53
54    // NOTE: async=YES means that the layer is re-cached periodically
55    self.asynchronous = FALSE;
56    self.contentsGravity = kCAGravityTopLeft;
57    //Layer backed view
58    //self.needsDisplayOnBoundsChange = YES;
59    //self.autoresizingMask = kCALayerWidthSizable | kCALayerHeightSizable;
60
61    //Disable CALayer's default animation
62    NSMutableDictionary * actions = [[NSMutableDictionary alloc] initWithObjectsAndKeys:
63                                    [NSNull null], @"anchorPoint",
64                                    [NSNull null], @"bounds",
65                                    [NSNull null], @"contents",
66                                    [NSNull null], @"contentsScale",
67                                    [NSNull null], @"onOrderIn",
68                                    [NSNull null], @"onOrderOut",
69                                    [NSNull null], @"position",
70                                    [NSNull null], @"sublayers",
71                                    nil];
72    self.actions = actions;
73    [actions release];
74
75    textureID = 0; // texture will be created by rendering pipe
76    target = 0;
77
78    return self;
79}
80
81- (void) dealloc {
82    JNIEnv *env = [ThreadUtilities getJNIEnvUncached];
83    (*env)->DeleteWeakGlobalRef(env, self.javaLayer);
84    self.javaLayer = nil;
85    [super dealloc];
86}
87
88- (CGLPixelFormatObj)copyCGLPixelFormatForDisplayMask:(uint32_t)mask {
89    return CGLRetainPixelFormat(sharedPixelFormat.CGLPixelFormatObj);
90}
91
92- (CGLContextObj)copyCGLContextForPixelFormat:(CGLPixelFormatObj)pixelFormat {
93    CGLContextObj contextObj = NULL;
94    CGLCreateContext(pixelFormat, sharedContext.CGLContextObj, &contextObj);
95    return contextObj;
96}
97
98// use texture (intermediate buffer) as src and blit it to the layer
99- (void) blitTexture
100{
101    if (textureID == 0) {
102        return;
103    }
104
105    glEnable(target);
106    glBindTexture(target, textureID);
107
108    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); // srccopy
109
110    float swid = 1.0f, shgt = 1.0f;
111    if (target == GL_TEXTURE_RECTANGLE_ARB) {
112        swid = textureWidth;
113        shgt = textureHeight;
114    }
115    glBegin(GL_QUADS);
116    glTexCoord2f(0.0f, 0.0f); glVertex2f(-1.0f, -1.0f);
117    glTexCoord2f(swid, 0.0f); glVertex2f( 1.0f, -1.0f);
118    glTexCoord2f(swid, shgt); glVertex2f( 1.0f,  1.0f);
119    glTexCoord2f(0.0f, shgt); glVertex2f(-1.0f,  1.0f);
120    glEnd();
121
122    glBindTexture(target, 0);
123    glDisable(target);
124}
125
126-(BOOL)canDrawInCGLContext:(CGLContextObj)glContext pixelFormat:(CGLPixelFormatObj)pixelFormat forLayerTime:(CFTimeInterval)timeInterval displayTime:(const CVTimeStamp *)timeStamp{
127    return textureID == 0 ? NO : YES;
128}
129
130-(void)drawInCGLContext:(CGLContextObj)glContext pixelFormat:(CGLPixelFormatObj)pixelFormat forLayerTime:(CFTimeInterval)timeInterval displayTime:(const CVTimeStamp *)timeStamp
131{
132    AWT_ASSERT_APPKIT_THREAD;
133
134    JNIEnv *env = [ThreadUtilities getJNIEnv];
135    DECLARE_CLASS(jc_JavaLayer, "sun/java2d/opengl/CGLLayer");
136    DECLARE_METHOD(jm_drawInCGLContext, jc_JavaLayer, "drawInCGLContext", "()V");
137
138    jobject javaLayerLocalRef = (*env)->NewLocalRef(env, self.javaLayer);
139    if ((*env)->IsSameObject(env, javaLayerLocalRef, NULL)) {
140        return;
141    }
142
143    // Set the current context to the one given to us.
144    CGLSetCurrentContext(glContext);
145
146    // Should clear the whole CALayer, because it can be larger than our texture.
147    glClearColor(0.0, 0.0, 0.0, 0.0);
148    glClear(GL_COLOR_BUFFER_BIT);
149
150    glViewport(0, 0, textureWidth, textureHeight);
151
152    (*env)->CallVoidMethod(env, javaLayerLocalRef, jm_drawInCGLContext);
153    CHECK_EXCEPTION();
154    (*env)->DeleteLocalRef(env, javaLayerLocalRef);
155
156    // Call super to finalize the drawing. By default all it does is call glFlush().
157    [super drawInCGLContext:glContext pixelFormat:pixelFormat forLayerTime:timeInterval displayTime:timeStamp];
158
159    CGLSetCurrentContext(NULL);
160}
161
162@end
163
164/*
165 * Class:     sun_java2d_opengl_CGLLayer
166 * Method:    nativeCreateLayer
167 * Signature: ()J
168 */
169JNIEXPORT jlong JNICALL
170Java_sun_java2d_opengl_CGLLayer_nativeCreateLayer
171(JNIEnv *env, jobject obj)
172{
173    __block CGLLayer *layer = nil;
174
175JNI_COCOA_ENTER(env);
176
177    jobject javaLayer = (*env)->NewWeakGlobalRef(env, obj);
178
179    [ThreadUtilities performOnMainThreadWaiting:YES block:^(){
180            AWT_ASSERT_APPKIT_THREAD;
181
182            layer = [[CGLLayer alloc] initWithJavaLayer: javaLayer];
183    }];
184
185JNI_COCOA_EXIT(env);
186
187    return ptr_to_jlong(layer);
188}
189
190// Must be called under the RQ lock.
191JNIEXPORT void JNICALL
192Java_sun_java2d_opengl_CGLLayer_validate
193(JNIEnv *env, jclass cls, jlong layerPtr, jobject surfaceData)
194{
195    CGLLayer *layer = OBJC(layerPtr);
196
197    if (surfaceData != NULL) {
198        OGLSDOps *oglsdo = (OGLSDOps*) SurfaceData_GetOps(env, surfaceData);
199        layer.textureID = oglsdo->textureID;
200        layer.target = GL_TEXTURE_2D;
201        layer.textureWidth = oglsdo->width;
202        layer.textureHeight = oglsdo->height;
203    } else {
204        layer.textureID = 0;
205    }
206}
207
208// Must be called on the AppKit thread and under the RQ lock.
209JNIEXPORT void JNICALL
210Java_sun_java2d_opengl_CGLLayer_blitTexture
211(JNIEnv *env, jclass cls, jlong layerPtr)
212{
213    CGLLayer *layer = jlong_to_ptr(layerPtr);
214
215    [layer blitTexture];
216}
217
218JNIEXPORT void JNICALL
219Java_sun_java2d_opengl_CGLLayer_nativeSetScale
220(JNIEnv *env, jclass cls, jlong layerPtr, jdouble scale)
221{
222    JNI_COCOA_ENTER(env);
223    CGLLayer *layer = jlong_to_ptr(layerPtr);
224    // We always call all setXX methods asynchronously, exception is only in
225    // this method where we need to change native texture size and layer's scale
226    // in one call on appkit, otherwise we'll get window's contents blinking,
227    // during screen-2-screen moving.
228    [ThreadUtilities performOnMainThreadWaiting:[NSThread isMainThread] block:^(){
229        layer.contentsScale = scale;
230    }];
231    JNI_COCOA_EXIT(env);
232}
233