1 /*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <hardware/hardware.h>
18
19 #include <fcntl.h>
20 #include <errno.h>
21
22 #include <cutils/log.h>
23 #include <cutils/atomic.h>
24
25 #include <hardware/hwcomposer.h>
26
27 #include <EGL/egl.h>
28
29 /*****************************************************************************/
30
31 struct hwc_context_t {
32 hwc_composer_device_1_t device;
33 /* our private state goes below here */
34 };
35
36 static int hwc_device_open(const struct hw_module_t* module, const char* name,
37 struct hw_device_t** device);
38
39 static struct hw_module_methods_t hwc_module_methods = {
40 open: hwc_device_open
41 };
42
43 hwc_module_t HAL_MODULE_INFO_SYM = {
44 common: {
45 tag: HARDWARE_MODULE_TAG,
46 version_major: 1,
47 version_minor: 0,
48 id: HWC_HARDWARE_MODULE_ID,
49 name: "Sample hwcomposer module",
50 author: "The Android Open Source Project",
51 methods: &hwc_module_methods,
52 }
53 };
54
55 /*****************************************************************************/
56
dump_layer(hwc_layer_1_t const * l)57 static void dump_layer(hwc_layer_1_t const* l) {
58 ALOGD("\ttype=%d, flags=%08x, handle=%p, tr=%02x, blend=%04x, {%d,%d,%d,%d}, {%d,%d,%d,%d}",
59 l->compositionType, l->flags, l->handle, l->transform, l->blending,
60 l->sourceCrop.left,
61 l->sourceCrop.top,
62 l->sourceCrop.right,
63 l->sourceCrop.bottom,
64 l->displayFrame.left,
65 l->displayFrame.top,
66 l->displayFrame.right,
67 l->displayFrame.bottom);
68 }
69
hwc_prepare(hwc_composer_device_1_t * dev,size_t numDisplays,hwc_display_contents_1_t ** displays)70 static int hwc_prepare(hwc_composer_device_1_t *dev,
71 size_t numDisplays, hwc_display_contents_1_t** displays) {
72 if (displays && (displays[0]->flags & HWC_GEOMETRY_CHANGED)) {
73 for (size_t i=0 ; i<displays[0]->numHwLayers ; i++) {
74 //dump_layer(&list->hwLayers[i]);
75 displays[0]->hwLayers[i].compositionType = HWC_FRAMEBUFFER;
76 }
77 }
78 return 0;
79 }
80
hwc_set(hwc_composer_device_1_t * dev,size_t numDisplays,hwc_display_contents_1_t ** displays)81 static int hwc_set(hwc_composer_device_1_t *dev,
82 size_t numDisplays, hwc_display_contents_1_t** displays)
83 {
84 //for (size_t i=0 ; i<list->numHwLayers ; i++) {
85 // dump_layer(&list->hwLayers[i]);
86 //}
87
88 EGLBoolean sucess = eglSwapBuffers((EGLDisplay)displays[0]->dpy,
89 (EGLSurface)displays[0]->sur);
90 if (!sucess) {
91 return HWC_EGL_ERROR;
92 }
93 return 0;
94 }
95
hwc_device_close(struct hw_device_t * dev)96 static int hwc_device_close(struct hw_device_t *dev)
97 {
98 struct hwc_context_t* ctx = (struct hwc_context_t*)dev;
99 if (ctx) {
100 free(ctx);
101 }
102 return 0;
103 }
104
105 /*****************************************************************************/
106
hwc_device_open(const struct hw_module_t * module,const char * name,struct hw_device_t ** device)107 static int hwc_device_open(const struct hw_module_t* module, const char* name,
108 struct hw_device_t** device)
109 {
110 int status = -EINVAL;
111 if (!strcmp(name, HWC_HARDWARE_COMPOSER)) {
112 struct hwc_context_t *dev;
113 dev = (hwc_context_t*)malloc(sizeof(*dev));
114
115 /* initialize our state here */
116 memset(dev, 0, sizeof(*dev));
117
118 /* initialize the procs */
119 dev->device.common.tag = HARDWARE_DEVICE_TAG;
120 dev->device.common.version = HWC_DEVICE_API_VERSION_1_0;
121 dev->device.common.module = const_cast<hw_module_t*>(module);
122 dev->device.common.close = hwc_device_close;
123
124 dev->device.prepare = hwc_prepare;
125 dev->device.set = hwc_set;
126
127 *device = &dev->device.common;
128 status = 0;
129 }
130 return status;
131 }
132