160 lines
4.2 KiB
C++
160 lines
4.2 KiB
C++
/*
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* The functions in this file allow for managing windows
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* windows are framebuffers that can be moved and rendered
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* to the primary framebuffer
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*/
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#include "include/driver_framebuffer_internal.h"
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/* Variables */
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Window* windows = NULL;
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/* Private functions */
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inline Window* _create_window()
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{ //Create an empty window object
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Window* window = (Window*) calloc(1, sizeof(Window));
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if (!window) return NULL;
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memset(window, 0, sizeof(Window));
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return window;
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}
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inline void _add_window(Window* window)
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{ //Add a window to the linked list
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if (windows == NULL) {
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windows = window;
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return;
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}
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Window* lastWindow = windows;
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while (lastWindow->_nextWindow != NULL) {
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lastWindow = lastWindow->_nextWindow;
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}
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lastWindow->_nextWindow = window;
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}
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void _debug_windows()
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{
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Window* window = windows;
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printf("Windows: ");
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while (window != NULL) {
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printf("%s ", window->name);
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window = window->_nextWindow;
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}
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printf("\n");
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}
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inline void _remove_window_from_linked_list(Window* window)
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{ //Remove a window from the linked list
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Window* prevWindow = window->_prevWindow;
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Window* nextWindow = window->_nextWindow;
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if (prevWindow) prevWindow->_nextWindow = nextWindow; //Link previous to next
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if (nextWindow) nextWindow->_prevWindow = prevWindow; //Link next to previous
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if (windows == window) windows = nextWindow; //Change the start window of the linked list
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}
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/* Public functions */
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Window* driver_framebuffer_window_create(const char* name, uint16_t width, uint16_t height)
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{
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if (driver_framebuffer_window_find(name)) return NULL; //If the window already exists do nothing and return.
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Window* window = _create_window();
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/* Set properties */
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window->name = strdup(name);
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window->width = width;
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window->height = height;
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window->orientation = landscape;
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window->enableTransparentColor = false;
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window->transparentColor = 0xFFFFFF;
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/* Configure automatic rendering */
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window->visible = false;
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window->hOffset = 0;
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window->vOffset = 0;
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window->drawWidth = width;
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window->drawHeight = height;
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/* Buffer */
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window->buffer = (uint8_t*) heap_caps_malloc(((width*height*PIXEL_SIZE)/8)+1, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
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/* Linked list */
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window->_prevWindow = driver_framebuffer_window_last();
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window->_nextWindow = NULL;
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_add_window(window); //Add window to linked list of windows
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return window;
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}
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void driver_framebuffer_window_remove(Window* window)
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{
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if (window->buffer) free(window->buffer);
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_remove_window_from_linked_list(window);
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free(window);
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}
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Window* driver_framebuffer_window_find(const char* name)
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{
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Window* currentWindow = windows;
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while (currentWindow != NULL) {
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if ((strlen(name) == strlen(currentWindow->name)) &&
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(strcmp(currentWindow->name, name)==0)
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) {
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return currentWindow;
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}
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currentWindow = currentWindow->_nextWindow;
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}
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return NULL;
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}
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Window* driver_framebuffer_window_first()
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{
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return windows;
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}
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Window* driver_framebuffer_window_next(Window* currentWindow)
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{
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if (currentWindow == NULL) return NULL;
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return currentWindow->_nextWindow;
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}
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Window* driver_framebuffer_window_last()
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{
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Window* lastWindow = windows;
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while (lastWindow && lastWindow->_nextWindow != NULL) {
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lastWindow = lastWindow->_nextWindow;
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}
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return lastWindow;
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}
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bool driver_framebuffer_window_rename(Window* window, const char* newName) {
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if (!window) return false;
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char* newNameBuffer = (char*) malloc(strlen(newName) + 1);
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if (newNameBuffer == NULL) return false;
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memset(newNameBuffer, 0, strlen(newName) + 1);
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strncpy(newNameBuffer, newName, strlen(newName));
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free(window->name);
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window->name = newNameBuffer;
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return true;
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}
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void driver_framebuffer_window_focus(Window* window)
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{
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_remove_window_from_linked_list(window);
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if (windows == window) windows = window->_nextWindow;
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window->_prevWindow = driver_framebuffer_window_last();
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_add_window(window);
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window->_nextWindow = NULL;
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}
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void driver_framebuffer_window_getSize(Window* window, int16_t* width, int16_t* height)
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{
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if (window == NULL) {
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//No window provided, use global context
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*width = FB_WIDTH;
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*height = FB_HEIGHT;
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} else {
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//Window provided, use window context
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*width = window->width;
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*height = window->height;
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}
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}
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