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      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 
     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 
     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 
     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 sucess = eglSwapBuffers((EGLDisplay)displays[0]->dpy,
     90             (EGLSurface)displays[0]->sur);
     91     if (!sucess) {
     92         return HWC_EGL_ERROR;
     93     }
     94     return 0;
     95 }
     96 
     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 
    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