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 <errno.h>
20 #include <fcntl.h>
21 #include <malloc.h>
22
23 #include <cutils/log.h>
24 #include <cutils/atomic.h>
25
26 #include <hardware/hwcomposer.h>
27
28 #include <EGL/egl.h>
29
30 /*****************************************************************************/
31
32 struct hwc_context_t {
33 hwc_composer_device_1_t device;
34 /* our private state goes below here */
35 };
36
37 static int hwc_device_open(const struct hw_module_t* module, const char* name,
38 struct hw_device_t** device);
39
40 static struct hw_module_methods_t hwc_module_methods = {
41 .open = hwc_device_open
42 };
43
44 hwc_module_t HAL_MODULE_INFO_SYM = {
45 .common = {
46 .tag = HARDWARE_MODULE_TAG,
47 .version_major = 1,
48 .version_minor = 0,
49 .id = HWC_HARDWARE_MODULE_ID,
50 .name = "Sample hwcomposer module",
51 .author = "The Android Open Source Project",
52 .methods = &hwc_module_methods,
53 }
54 };
55
56 /*****************************************************************************/
57
dump_layer(hwc_layer_1_t const * l)58 static void dump_layer(hwc_layer_1_t const* l) {
59 ALOGD("\ttype=%d, flags=%08x, handle=%p, tr=%02x, blend=%04x, {%d,%d,%d,%d}, {%d,%d,%d,%d}",
60 l->compositionType, l->flags, l->handle, l->transform, l->blending,
61 l->sourceCrop.left,
62 l->sourceCrop.top,
63 l->sourceCrop.right,
64 l->sourceCrop.bottom,
65 l->displayFrame.left,
66 l->displayFrame.top,
67 l->displayFrame.right,
68 l->displayFrame.bottom);
69 }
70
hwc_prepare(hwc_composer_device_1_t *,size_t,hwc_display_contents_1_t ** displays)71 static int hwc_prepare(hwc_composer_device_1_t * /*dev*/,
72 size_t /*numDisplays*/, hwc_display_contents_1_t** displays) {
73 if (displays && (displays[0]->flags & HWC_GEOMETRY_CHANGED)) {
74 for (size_t i=0 ; i<displays[0]->numHwLayers ; i++) {
75 //dump_layer(&list->hwLayers[i]);
76 displays[0]->hwLayers[i].compositionType = HWC_FRAMEBUFFER;
77 }
78 }
79 return 0;
80 }
81
hwc_set(hwc_composer_device_1_t *,size_t,hwc_display_contents_1_t ** displays)82 static int hwc_set(hwc_composer_device_1_t * /*dev*/,
83 size_t /*numDisplays*/, hwc_display_contents_1_t** displays)
84 {
85 //for (size_t i=0 ; i<list->numHwLayers ; i++) {
86 // dump_layer(&list->hwLayers[i]);
87 //}
88
89 EGLBoolean success = eglSwapBuffers((EGLDisplay)displays[0]->dpy,
90 (EGLSurface)displays[0]->sur);
91 if (!success) {
92 return HWC_EGL_ERROR;
93 }
94 return 0;
95 }
96
hwc_device_close(struct hw_device_t * dev)97 static int hwc_device_close(struct hw_device_t *dev)
98 {
99 struct hwc_context_t* ctx = (struct hwc_context_t*)dev;
100 if (ctx) {
101 free(ctx);
102 }
103 return 0;
104 }
105
106 /*****************************************************************************/
107
hwc_device_open(const struct hw_module_t * module,const char * name,struct hw_device_t ** device)108 static int hwc_device_open(const struct hw_module_t* module, const char* name,
109 struct hw_device_t** device)
110 {
111 int status = -EINVAL;
112 if (!strcmp(name, HWC_HARDWARE_COMPOSER)) {
113 struct hwc_context_t *dev;
114 dev = (hwc_context_t*)malloc(sizeof(*dev));
115
116 /* initialize our state here */
117 memset(dev, 0, sizeof(*dev));
118
119 /* initialize the procs */
120 dev->device.common.tag = HARDWARE_DEVICE_TAG;
121 dev->device.common.version = HWC_DEVICE_API_VERSION_1_0;
122 dev->device.common.module = const_cast<hw_module_t*>(module);
123 dev->device.common.close = hwc_device_close;
124
125 dev->device.prepare = hwc_prepare;
126 dev->device.set = hwc_set;
127
128 *device = &dev->device.common;
129 status = 0;
130 }
131 return status;
132 }
133