thooge/esp32-nmea2000-obp60
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HTTP request for PageNavigation

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norbert-walter
2025-11-25 22:38:08 +01:00
parent f77107616d
commit 16f9f9217d
8 changed files with 1158 additions and 8 deletions
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71
lib/obp60task/PageNavigation.cpp
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@@ -2,6 +2,16 @@
#include "Pagedata.h"
#include "OBP60Extensions.h"
#include "NetworkClient.h" // Network connection
#include "ImageDecoder.h" // Image decoder for navigation map
#include "Logo_OBP_400x300_sw.h"
// Limits
#define JSON_BUFFER 30000 // Max buffer size for JSON content (30 kB picture + values)
NetworkClient net(JSON_BUFFER);
ImageDecoder decoder;
class PageNavigation : public Page
{
@@ -87,35 +97,80 @@ public:
if (bvalue1 == NULL) return PAGE_OK; // WTF why this statement?
LOG_DEBUG(GwLog::LOG,"Drawing at PageNavigation, %s: %f, %s: %f, %s: %f, %s: %f", name1.c_str(), value1, name2.c_str(), value2, name3.c_str(), value3, name4.c_str(), value4);
// Load navigation map
//***********************************************************
// Rotate the picture in 1° steps
int angle = 25;
// Server settings
String server = "norbert-walter.dnshome.de";
int port = 80;
// URL to OBP Maps Converter
// For more details see: https://github.com/norbert-walter/maps-converter
String url = String("http://") + server + ":" + port + // OBP Server
String("/get_image_json?") + // Service: Output B&W picture as JSON (Base64 + gzip)
"zoom=15" + // Zoom level: 15
"&lat=53.9028" + // Latitude
"&lon=11.4441" + // Longitude
"&mrot=" + angle + // Rotation angle navigation map
"&mtype=9" + // Free Nautical Charts with depth
"&dtype=1" + // Dithering type: Threshold dithering
"&width=400" + // With navigation map
"&height=250" + // Height navigation map
"&cutout=0" + // No picture cutouts
"&tab=0" + // No tab size
"&border=2" + // Border line size: 2 pixel
"&symbol=2" + // Symbol: Triangle
"&srot=" + angle + // Symbol rotation angle
"&ssize=15" + // Symbole size: 15 pixel
"&grid=1" // Show grid: On
;
// Set display in partial refresh mode
getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
getdisplay().setTextColor(commonData->fgcolor);
// If a network connection to URL
if (net.fetchAndDecompressJson(url)) { // Connect to URL, read gzip answare and deflate JSON content
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
}
// Draw page
//***********************************************************
// Set display in partial refresh mode
getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
getdisplay().setTextColor(commonData->fgcolor);
// ############### Draw Navigation Map ################
getdisplay().setFont(&Ubuntu_Bold12pt8b);
getdisplay().setCursor(20, 60);
getdisplay().print(name1);
getdisplay().setCursor(120, 60);
getdisplay().setCursor(80, 60);
getdisplay().print(svalue1);
getdisplay().setCursor(20, 80);
getdisplay().print(name2);
getdisplay().setCursor(120, 80);
getdisplay().setCursor(80, 80);
getdisplay().print(svalue2);
getdisplay().setCursor(20, 100);
getdisplay().print(name3);
getdisplay().setCursor(120, 100);
getdisplay().setCursor(80, 100);
getdisplay().print(svalue3);
getdisplay().setCursor(20, 120);
getdisplay().print(name4);
getdisplay().setCursor(120, 120);
getdisplay().setCursor(80, 120);
getdisplay().print(svalue4);
return PAGE_UPDATE;