Demo for Embedded World 2015.
Dependencies: DMBasicGUI DMSupport
Demo running on several LPC4088 Display Modules on the Embedded World 2015 exhibition.
Information
To run the demo first drag-n-drop the to_sync.fs3 file to the MBED drive and then drag-n-drop the demo itself. This way both the file system and software are up to date.
This is what the launcher will look like:
AppImageViewer.cpp
- Committer:
- alindvall
- Date:
- 2015-02-19
- Revision:
- 0:6bd24cbb88a1
File content as of revision 0:6bd24cbb88a1:
/* * Copyright 2014 Embedded Artists AB * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbed.h" #include "AppImageViewer.h" #include "lpc_swim_font.h" #include "lpc_swim_image.h" #include "Image.h" #include "image_data.h" /****************************************************************************** * Defines and typedefs *****************************************************************************/ #define BOX_SIDE 192 //256 #define BTN_WIDTH 40 #define BTN_HEIGHT 40 #define BTN_OFF 20 /****************************************************************************** * Global variables *****************************************************************************/ /****************************************************************************** * Private functions *****************************************************************************/ static void buttonClicked(uint32_t x) { bool* done = (bool*)x; *done = true; } void AppImageViewer::draw() { // Prepare fullscreen swim_window_open(_win, _disp->width(), _disp->height(), // full size (COLOR_T*)_fb1, 0,0,_disp->width()-1, _disp->height()-1, // window position and size 0, // border BLACK, BLACK, BLACK); // colors: pen, backgr, forgr _btn = new ImageButton(_win->fb, _win->xpmax - BTN_OFF - BTN_WIDTH, _win->ypmax - BTN_OFF - BTN_HEIGHT, BTN_WIDTH, BTN_HEIGHT); _btn->loadImages(img_ok, img_size_ok); } void AppImageViewer::load(const char* file) { Image::ImageData_t pre = {0}; int res = Image::decode(file, Image::RES_16BIT, &pre); if (res == 0) { DMBoard::instance().logger()->printf("[ImageLoader] Preparing %s\n", file); Image::ImageData_t* data = _mailbox.alloc(osWaitForever); if (data != NULL) { *data = pre; _mailbox.put(data); } else { DMBoard::instance().logger()->printf("[ImageLoader] Failed to get memory to prepare %s\n", file); } } } static bool recursiveProcessFS(char* buff, const char* name, unsigned int maxLen, AppImageViewer* app, int depth, int maxDepth) { if (depth > maxDepth) { return true; } uint32_t len = strlen(buff); if (len > 0) { if (buff[len - 1] != '/') { buff[len++] = '/'; buff[len] = '\0'; } } if ((strlen(name) + len) >= maxLen) { // avoid memory overwrite due to too long file path return true; } strcat(buff, name); len += strlen(name); DIR *d = opendir(buff); bool result = true; // success if (d != NULL) { struct dirent *p; while (result && ((p = readdir(d)) != NULL)) { result = recursiveProcessFS(buff, p->d_name, maxLen, app, depth+1, maxDepth); buff[len] = '\0'; } closedir(d); } else { // a file if (len > 3) { if ((strncasecmp(buff+len-4, ".bmp", 4)==0) || (strncasecmp(buff+len-4, ".png", 4)==0) || (strncasecmp(buff+len-4, ".raw", 4)==0)) { DMBoard::instance().logger()->printf("[ImageLoader] found %s\n", buff); app->load(buff); } } } return result; } static void loaderTask(void const* args) { char* buff = (char*)malloc(512); if (buff != NULL) { DMBoard::instance().logger()->printf("Recursive list of file and folders in /mci/\n"); buff[0] = '\0'; recursiveProcessFS(buff, "/mci/", 512, (AppImageViewer*)args, 0, 2); DMBoard::instance().logger()->printf("Recursive list of file and folders in /usb/\n"); buff[0] = '\0'; recursiveProcessFS(buff, "/usb/", 512, (AppImageViewer*)args, 0, 2); DMBoard::instance().logger()->printf("Recursive list of file and folders in /qspi/\n"); buff[0] = '\0'; recursiveProcessFS(buff, "/qspi/", 512, (AppImageViewer*)args, 0, 2); free(buff); } DMBoard::instance().logger()->printf("loaderTask done\n"); } /****************************************************************************** * Public functions *****************************************************************************/ AppImageViewer::AppImageViewer() : _disp(NULL), _win(NULL), _fb1(NULL), _fb2(NULL), _btn(NULL), _active(0) { } AppImageViewer::~AppImageViewer() { teardown(); } bool AppImageViewer::setup() { _disp = DMBoard::instance().display(); _win = (SWIM_WINDOW_T*)malloc(sizeof(SWIM_WINDOW_T)); _fb1 = _disp->allocateFramebuffer(); _fb2 = _disp->allocateFramebuffer(); return (_win != NULL && _fb1 != NULL && _fb2 != NULL); } void AppImageViewer::runToCompletion() { // Alternative 1: use the calling thread's context to run in bool done = false; draw(); _btn->setAction(buttonClicked, (uint32_t)&done); void* oldFB = _disp->swapFramebuffer(_fb1); _active = 1; Thread* tLoader = new Thread(loaderTask, this, osPriorityNormal, 8192); bool first = true; Timer t; while(!done) { osEvent evt = _mailbox.get(1000); if (evt.status == osEventMail) { COLOR_T* fb; if (_active == 1) { // render on the second frame buffer fb = (COLOR_T*)_fb2; } else { // render on the first frame buffer fb = (COLOR_T*)_fb1; } _win->fb = fb; Image::ImageData_t* data = (Image::ImageData_t*)evt.value.p; swim_put_image_xy(_win, (COLOR_T*)data->pixels, data->width, data->height, _disp->width()-data->width, _disp->height()-data->height); free(data->pointerToFree); _mailbox.free(data); if (first) { first = false; t.start(); } else { while (t.read_ms() < 2000) { Thread::wait(100); } } _disp->setFramebuffer(fb); _active = (_active == 1 ? 2 : 1); t.reset(); } else if (tLoader->get_state() == Thread::Inactive) { // No more images in the queue and the loader thread // has completed its search break; } } delete tLoader; // The button must be drawn on the current framebuffer _btn->draw(_win->fb); // Wait for touches, but the AppLauncher is already listening // for new touch event and sends a signal to its thread which // is the same as runs this function so it is enough to wait // for that signal. TouchPanel* touch = DMBoard::instance().touchPanel(); touch_coordinate_t coord; while(!done) { Thread::signal_wait(0x1); if (touch->read(coord) == TouchPanel::TouchError_Ok) { if (_btn->handle(coord.x, coord.y, coord.z > 0)) { _btn->draw(); } } } // User has clicked the button, restore the original FB _disp->swapFramebuffer(oldFB); swim_window_close(_win); } bool AppImageViewer::teardown() { if (_win != NULL) { free(_win); _win = NULL; } if (_fb1 != NULL) { free(_fb1); _fb1 = NULL; } if (_fb2 != NULL) { free(_fb2); _fb2 = NULL; } if (_btn != NULL) { delete _btn; _btn = NULL; } return true; }