Add -s flag for screenshot export to autotester

tests/autotester/autotester.cpp

@@ -45,6 +45,37 @@ static char* myrealpath(const char* file_name)
 #endif
 }
 
+static void dumpScreenshot(const std::string& description)
+{
+    std::string safe_name = description;
+    for (char& c : safe_name) {
+        if (c == '/' || c == '\\' || c == ':' || c == '*' || c == '?' || c == '"' || c == '<' || c == '>' || c == '|') {
+            c = '_';
+        }
+    }
+
+    std::string path = safe_name + ".rgba";
+
+    uint32_t *frame = static_cast<uint32_t*>(malloc(LCD_SIZE * sizeof(uint32_t)));
+    if (!frame) {
+        std::cerr << "\t[Screenshot] Failed to allocate frame buffer" << std::endl;
+        return;
+    }
+
+    cemucore::emu_lcd_drawframe(frame);
+
+    FILE *f = fopen(path.c_str(), "wb");
+    if (f) {
+        fwrite(frame, sizeof(uint32_t), LCD_SIZE, f);
+        fclose(f);
+        std::cout << "\t[Screenshot] Saved " << path << std::endl;
+    } else {
+        std::cerr << "\t[Screenshot] Failed to write " << path << std::endl;
+    }
+
+    free(frame);
+}
+
 namespace autotester
 {
 
@@ -54,6 +85,7 @@ config_t config;
 std::string oldCWD;
 
 bool debugMode = true;
+bool screenshotsMode = false;
 bool ignoreROMfield = false;
 bool configLoaded = false;
 
@@ -217,6 +249,9 @@ static const std::unordered_map<std::string, seq_cmd_func_t> valid_seq_commands
                     ::free(temp_buffer_dup);
                 }
                 hashesTested++;
+                if (screenshotsMode) {
+                    dumpScreenshot(param.description);
+                }
             } else {
                 std::cerr << "\t[Error] hash #" << which_hash << " was not declared in the JSON file. Ignoring." << std::endl;
             }

tests/autotester/autotester.h

@@ -73,7 +73,7 @@
         { "cursorImage",    0xE30800 },  { "cursorImage_size",     1024 }
     };
 
     static const char* varExtensions[] = {
         "8xn",  // 00
         "8xl",
         "8xm",
@@ -135,6 +135,7 @@
     extern config_t config;
 
     extern bool debugMode;
+    extern bool screenshotsMode;
     extern bool ignoreROMfield;
     extern bool configLoaded;
 
@@ -147,4 +148,3 @@
 }
 
 #endif
-

tests/autotester/autotester_cli.cpp

@@ -60,21 +60,29 @@ int main(int argc, char* argv[])
     // Used if the coreThread has been started (need to exit properly ; uses gotos)
     int retVal = 0;
 
-    if (argc < 2)
-    {
-        std::cerr << "[Error] Needs a path argument, the test config JSON file" << std::endl;
-        return -1;
+    autotester::debugMode = false;
+    autotester::screenshotsMode = false;
+    int argi = 1;
+    while (argi < argc && argv[argi][0] == '-') {
+        if (strcmp(argv[argi], "-d") == 0) {
+            autotester::debugMode = true;
+        } else if (strcmp(argv[argi], "-s") == 0 || strcmp(argv[argi], "--screenshots") == 0) {
+            autotester::screenshotsMode = true;
+        } else {
+            std::cerr << "[Error] Unknown option: " << argv[argi] << std::endl;
+            std::cerr << "Usage: autotester [-d] [-s|--screenshots] <config.json>" << std::endl;
+            return -1;
+        }
+        argi++;
     }
 
-    if (strcmp(argv[1], "-d") == 0)
-    {
-        autotester::debugMode = true;
-        argv++;
-    } else {
-        autotester::debugMode = false;
+    if (argi >= argc) {
+        std::cerr << "[Error] Needs a path argument, the test config JSON file" << std::endl;
+        std::cerr << "Usage: autotester [-d] [-s|--screenshots] <config.json>" << std::endl;
+        return -1;
     }
 
-    const std::string jsonPath(argv[1]);
+    const std::string jsonPath(argv[argi]);
     std::string jsonContents;
     std::ifstream ifs(jsonPath);
     if (ifs.good())