124 lines
4.9 KiB
C++
124 lines
4.9 KiB
C++
#include "LCD_Image.h"
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PNG png;
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File Image_file;
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uint16_t Image_CNT;
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char SD_Image_Name[100][100] ;
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char File_Image_Name[100][100] ;
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int16_t xpos = 0;
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int16_t ypos = 0;
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void * pngOpen(const char *filePath, int32_t *size) {
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Image_file = SD.open(filePath);
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*size = Image_file.size();
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return &Image_file;
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}
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void pngClose(void *handle) {
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File Image_file = *((File*)handle);
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if (Image_file) Image_file.close();
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}
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int32_t pngRead(PNGFILE *page, uint8_t *buffer, int32_t length) {
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if (!Image_file) return 0;
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page = page; // Avoid warning
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return Image_file.read(buffer, length);
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}
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int32_t pngSeek(PNGFILE *page, int32_t position) {
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if (!Image_file) return 0;
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page = page; // Avoid warning
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return Image_file.seek(position);
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}
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//=========================================v==========================================
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// pngDraw
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//====================================================================================
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// This next function will be called during decoding of the png file to
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// render each image line to the TFT. If you use a different TFT library
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// you will need to adapt this function to suit.
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// Callback function to draw pixels to the display
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static uint16_t lineBuffer[MAX_IMAGE_WIDTH];
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void pngDraw(PNGDRAW *pDraw) {
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png.getLineAsRGB565(pDraw, lineBuffer, PNG_RGB565_BIG_ENDIAN, 0xffffffff);
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uint32_t size = pDraw->iWidth;
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for (size_t i = 0; i < size; i++) {
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lineBuffer[i] = (((lineBuffer[i] >> 8) & 0xFF) | ((lineBuffer[i] << 8) & 0xFF00)); // 所有数据修正
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}
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LCD_addWindow(xpos, pDraw->y, xpos + pDraw->iWidth, ypos + pDraw->y + 1,lineBuffer); // x_end End index on x-axis (x_end not included)
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}
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/////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////////////
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void Search_Image(const char* directory, const char* fileExtension) {
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Image_CNT = Folder_retrieval(directory,fileExtension,SD_Image_Name,100);
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if(Image_CNT) {
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for (int i = 0; i < Image_CNT; i++) {
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strcpy(File_Image_Name[i], SD_Image_Name[i]);
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remove_file_extension(File_Image_Name[i]);
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}
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}
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}
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void Show_Image(const char * filePath)
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{
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printf("Currently display picture %s\r\n",filePath);
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int16_t ret = png.open(filePath, pngOpen, pngClose, pngRead, pngSeek, pngDraw);
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if (ret == PNG_SUCCESS) {
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printf("image specs: (%d x %d), %d bpp, pixel type: %d\r\n", png.getWidth(), png.getHeight(), png.getBpp(), png.getPixelType());
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uint32_t dt = millis();
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if (png.getWidth() > MAX_IMAGE_WIDTH) {
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printf("Image too wide for allocated line buffer size!\r\n");
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}
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else {
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ret = png.decode(NULL, 0);
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png.close();
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}
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printf("%d ms\r\n",millis()-dt);
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}
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}
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void Display_Image(const char* directory, const char* fileExtension, uint16_t ID)
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{
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Search_Image(directory,fileExtension);
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if(Image_CNT) {
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String FilePath;
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if (String(directory) == "/") { // Handle the case when the directory is the root
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FilePath = String(directory) + SD_Image_Name[ID];
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} else {
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FilePath = String(directory) + "/" + SD_Image_Name[ID];
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}
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const char* filePathCStr = FilePath.c_str(); // Convert String to c_str() for Show_Image function
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printf("Show : %s \r\n", filePathCStr); // Print file path for debugging
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Show_Image(filePathCStr); // Show the image using the file path
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}
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else
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printf("No files with extension '%s' found in directory: %s\r\n", fileExtension, directory);
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}
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uint16_t Now_Image = 0;
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void Image_Next(const char* directory, const char* fileExtension)
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{
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if(!digitalRead(BOOT_KEY_PIN)){
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while(!digitalRead(BOOT_KEY_PIN));
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Now_Image ++;
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if(Now_Image == Image_CNT)
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Now_Image = 0;
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Display_Image(directory,fileExtension,Now_Image);
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}
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}
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void Image_Next_Loop(const char* directory, const char* fileExtension,uint32_t NextTime)
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{
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static uint32_t NextTime_Now=0;
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NextTime_Now++;
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if(NextTime_Now == NextTime)
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{
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NextTime_Now = 0;
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Now_Image ++;
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if(Now_Image == Image_CNT)
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Now_Image = 0;
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Display_Image(directory,fileExtension,Now_Image);
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}
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} |