Allow to specify the snapshot prefix.

diff --git a/glretrace.py b/glretrace.py
index c516c16..a66d5d2 100644 (file)
--- a/glretrace.py
+++ b/glretrace.py
@@ -164,10 +164,12 @@ unsigned __frame = 0;
 long long __startTime = 0;
 static enum {
     MODE_DISPLAY = 0,
-    MODE_SCREENSHOT,
+    MODE_SNAPSHOT,
     MODE_COMPARE,
 } __mode = MODE_DISPLAY;
 
+const char *__snapshot_prefix = "";
+
 
 static void
 checkGlError(void) {
@@ -228,10 +230,10 @@ static void display_noop(void) {
 static void frame_complete(void) {
     ++__frame;
     
-    if (!__reshape_window && (__mode == MODE_SCREENSHOT || __mode == MODE_COMPARE)) {
+    if (!__reshape_window && (__mode == MODE_SNAPSHOT || __mode == MODE_COMPARE)) {
         char filename[PATH_MAX];
 
-        snprintf(filename, sizeof filename, "screenshot_%04u.png", __frame);
+        snprintf(filename, sizeof filename, "%s%04u.png", __snapshot_prefix, __frame);
         
         Image::Image *ref;
         if (__mode == MODE_COMPARE) {
@@ -246,7 +248,7 @@ static void frame_complete(void) {
         Image::Image src(__window_width, __window_height, true);
         glReadPixels(0, 0, __window_width, __window_height, GL_RGBA, GL_UNSIGNED_BYTE, src.pixels);
 
-        if (__mode == MODE_SCREENSHOT) {
+        if (__mode == MODE_SNAPSHOT) {
             if (src.writePNG(filename) && verbosity) {
                 std::cout << "Wrote " << filename << "\n";
             }
@@ -317,8 +319,9 @@ static void usage(void) {
         "Usage: glretrace [OPTION] TRACE\n"
         "Replay TRACE.\n"
         "\n"
-        "  -c           compare against screenshots\n"
+        "  -c           compare against snapshots\n"
         "  -db          use a double buffer visual\n"
+        "  -p PREFIX    snapshot prefix\n"
         "  -s           take snapshots\n"
         "  -v           verbose output\n";
 }
@@ -343,8 +346,10 @@ int main(int argc, char **argv)
         } else if (!strcmp(arg, "--help")) {
             usage();
             return 0;
+        } else if (!strcmp(arg, "-p")) {
+            __snapshot_prefix = argv[++i];
         } else if (!strcmp(arg, "-s")) {
-            __mode = MODE_SCREENSHOT;
+            __mode = MODE_SNAPSHOT;
         } else if (!strcmp(arg, "-v")) {
             ++verbosity;
         } else {