79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
#include "Display_PNG.h"
|
|
|
|
PNG png;
|
|
File Image_file;
|
|
|
|
uint16_t Image_Count = 0;
|
|
char Image_Names[100][100];
|
|
|
|
int16_t xpos = 0;
|
|
int16_t ypos = 0;
|
|
|
|
void * pngOpen(const char *filePath, int32_t *size) {
|
|
Image_file = SD_MMC.open(filePath);
|
|
*size = Image_file.size();
|
|
return &Image_file;
|
|
}
|
|
|
|
void pngClose(void *handle) {
|
|
File Image_file = *((File*)handle);
|
|
if (Image_file) Image_file.close();
|
|
}
|
|
|
|
int32_t pngRead(PNGFILE *page, uint8_t *buffer, int32_t length) {
|
|
if (!Image_file) return 0;
|
|
return Image_file.read(buffer, length);
|
|
}
|
|
|
|
int32_t pngSeek(PNGFILE *page, int32_t position) {
|
|
if (!Image_file) return 0;
|
|
return Image_file.seek(position);
|
|
}
|
|
|
|
static uint16_t lineBuffer[MAX_IMAGE_WIDTH];
|
|
void pngDraw(PNGDRAW *pDraw) {
|
|
png.getLineAsRGB565(pDraw, lineBuffer, PNG_RGB565_BIG_ENDIAN, 0xffffffff);
|
|
uint32_t size = pDraw->iWidth;
|
|
for (size_t i = 0; i < size; i++) {
|
|
lineBuffer[i] = (((lineBuffer[i] >> 8) & 0xFF) | ((lineBuffer[i] << 8) & 0xFF00));
|
|
}
|
|
LCD_addWindow(xpos, pDraw->y, xpos + pDraw->iWidth - 1, ypos + pDraw->y, lineBuffer);
|
|
}
|
|
|
|
void Search_Images(const char* directory) {
|
|
Image_Count = Folder_retrieval(directory, ".png", Image_Names, 100);
|
|
}
|
|
|
|
void Display_Image_By_Path(const char* filePath) {
|
|
printf("Displaying image: %s\r\n", filePath);
|
|
int16_t ret = png.open(filePath, pngOpen, pngClose, pngRead, pngSeek, pngDraw);
|
|
if (ret == PNG_SUCCESS) {
|
|
printf("Image dimensions: %d x %d, %d bpp\r\n", png.getWidth(), png.getHeight(), png.getBpp());
|
|
if (png.getWidth() > MAX_IMAGE_WIDTH) {
|
|
printf("Image is too wide for line buffer!\r\n");
|
|
} else {
|
|
ret = png.decode(NULL, 0);
|
|
png.close();
|
|
}
|
|
} else {
|
|
printf("Failed to open PNG image! Error code: %d\r\n", ret);
|
|
}
|
|
}
|
|
|
|
void Display_Image_By_Index(const char* directory, uint16_t index) {
|
|
if (Image_Count == 0) {
|
|
Search_Images(directory);
|
|
}
|
|
if (Image_Count > 0 && index < Image_Count) {
|
|
String filePath;
|
|
if (String(directory) == "/") {
|
|
filePath = String(directory) + Image_Names[index];
|
|
} else {
|
|
filePath = String(directory) + "/" + Image_Names[index];
|
|
}
|
|
Display_Image_By_Path(filePath.c_str());
|
|
} else {
|
|
printf("Invalid image index: %d (Total images: %d)\r\n", index, Image_Count);
|
|
}
|
|
}
|