Sample GUI for LPC4088. Base code to begin dev
Dependencies: DMBasicGUI DMSupport
Fork of lpc4088_displaymodule_shipped_demo by
Diff: AppImageViewer.cpp
- Revision:
- 0:b94e330c98ac
- Child:
- 4:a7cbb22e4348
diff -r 000000000000 -r b94e330c98ac AppImageViewer.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/AppImageViewer.cpp Fri Mar 20 13:36:44 2015 +0000 @@ -0,0 +1,267 @@ +/* + * 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" + +/****************************************************************************** + * Defines and typedefs + *****************************************************************************/ + +#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 + + // Create (but don't show) the button + _btn = new ImageButton(_win->fb, _win->xpmax - BTN_OFF - _resOk->width(), _win->ypmax - BTN_OFF - _resOk->height(), _resOk->width(), _resOk->height()); + _btn->loadImages(_resOk); + // Copy everything onto the back buffer + memcpy(_fb2, _fb1, _disp->fbSize()); +} + +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); + if (DMBoard::instance().display()->width() == 480) { + DMBoard::instance().logger()->printf("Recursive list of file and folders in /qspi/480x272/\n"); + buff[0] = '\0'; + recursiveProcessFS(buff, "/qspi/480x272/", 512, (AppImageViewer*)args, 0, 1); + } else { + DMBoard::instance().logger()->printf("Recursive list of file and folders in /qspi/800x480/\n"); + buff[0] = '\0'; + recursiveProcessFS(buff, "/qspi/800x480/", 512, (AppImageViewer*)args, 0, 1); + } + 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), _resOk(NULL) +{ +} + +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)/2, (_disp->height()-data->height)/2); + 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; +} + +void AppImageViewer::addResource(Resources id, Resource* res) +{ + _resOk = res; +} +