thooge/esp32-nmea2000-obp60
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First working version for PageNavigation, use PSRAM

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norbert-walter
2025-11-26 14:29:20 +01:00
parent 16f9f9217d
commit e02ca265ae
1 changed files with 42 additions and 17 deletions
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55
lib/obp60task/PageNavigation.cpp
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@@ -7,11 +7,10 @@
#include "Logo_OBP_400x300_sw.h"
// Limits
// Defines for reading of navigation map
#define JSON_BUFFER 30000 // Max buffer size for JSON content (30 kB picture + values)
NetworkClient net(JSON_BUFFER);
ImageDecoder decoder;
NetworkClient net(JSON_BUFFER); // Define network client
ImageDecoder decoder; // Define image decoder
class PageNavigation : public Page
{
@@ -132,19 +131,45 @@ public:
getdisplay().setTextColor(commonData->fgcolor);
// If a network connection to URL
if (net.fetchAndDecompressJson(url)) { // Connect to URL, read gzip answare and deflate JSON content
if (net.fetchAndDecompressJson(url)) {
auto& json = net.json(); // Parse JSON content
int numPix = json["number_pixels"] | 0; // Read number of picture pixels
String b64 = json["picture_base64"] | ""; // Read the Base64 bit steram content (picture)
static uint8_t imageData[400 * 300]; // Set picture buffer
size_t decodedSize = 0; // Reset decoded size of Basse64 bit stream content
/*
decoder.decodeBase64(b64, imageData, sizeof(imageData), decodedSize); // Decode Base64 bit stream content
getdisplay().drawBitmap(0, 25, imageData, getdisplay().width(), getdisplay().height(), GxEPD_BLACK); // Show picture with Y offset 25 pixel
*/
getdisplay().drawBitmap(0, 0, gImage_Logo_OBP_400x300_sw, getdisplay().width(), getdisplay().height(), GxEPD_BLACK); // Show picture with Y offset 25 pixel
auto& json = net.json(); // Extract JSON content
int numPix = json["number_pixels"] | 0; // Read number of pixels
int imgWidth = json["width"] | 0; // Read width of image
int imgHeight = json["height"] | 0; // Read height og image
const char* b64src = json["picture_base64"].as<const char*>(); // Read picture as Base64 content
size_t b64len = strlen(b64src); // Calculate length of Base64 content
// Copy Base64 content in PSRAM
char* b64 = (char*) heap_caps_malloc(b64len + 1, MALLOC_CAP_SPIRAM); // Allcate PSRAM for Base64 content
if (!b64) {
Serial.println("ERROR: PSRAM alloc base64 failed");
return PAGE_UPDATE;
}
memcpy(b64, b64src, b64len + 1); // Copy Base64 content in PSRAM
// Set image buffer in PSRAM
//size_t imgSize = getdisplay().width() * getdisplay().height(); // Calculate image size
size_t imgSize = numPix; // Calculate image size
uint8_t* imageData = (uint8_t*) heap_caps_malloc(imgSize, MALLOC_CAP_SPIRAM); // Allocate PSRAM for image
if (!imageData) {
Serial.println("ERROR: PSRAM alloc image buffer failed");
free(b64);
return PAGE_UPDATE;
}
// Decode Base64 content to image
size_t decodedSize = 0;
decoder.decodeBase64(b64, imageData, imgSize, decodedSize);
// Show image (navigation map)
getdisplay().drawBitmap(0, 25, imageData, imgWidth, imgHeight, commonData->fgcolor);
// Clean PSRAM
free(b64);
free(imageData);
}
// Draw page
//***********************************************************