add external supersampling to animate script

[chaz/rasterize] / main.c

diff --git a/main.c b/main.c
index 08a752e0494f9eb17139588a68bead39f7cce363..8f4ca4d4d7ab52636fcb4d3ed66ffe186a668b03 100644 (file)
--- a/main.c
+++ b/main.c
@@ -5,7 +5,9 @@
  * mcgarvey@eng.utah.edu
  */
 
-#include <stdio.h>
+#define _POSIX_C_SOURCE 2
+#include <errno.h>
+#include <unistd.h>
 
 #include "raster.h"
 #include "scene.h"
@@ -16,15 +18,36 @@
  */
 static int load(scene_t** scene, const char* filename)
 {
-    *scene = scene_alloc(filename);
+    FILE* file = fopen(filename, "r");
+    if (file == NULL) {
+        fprintf(stderr, "Cannot read %s: %s\n", filename, strerror(errno));
+        return -1;
+    }
+
+    *scene = scene_alloc(file);
+    if (*scene == NULL) {
+        fclose(file);
+        return -1;
+    }
+
+    fclose(file);
+    return 0;
+}
+
+/*
+ * Load a scene from standard input.
+ */
+static int load_from_stdin(scene_t** scene)
+{
+    *scene = scene_alloc(stdin);
     if (*scene == NULL) {
-        return 1;
+        return -1;
     }
     return 0;
 }
 
 /*
- * Load a scene file, render it, and export it to PPM and BMP formats.
+ * Load a scene file, render it, and export it.
  */
 static void draw(const char* filename)
 {
@@ -37,15 +60,35 @@ static void draw(const char* filename)
 
     char* u3d = mem_strdup(filename);
     strcut(u3d, '.');
+#if EXPORT_PPM
     char* ppm = mem_strcat(u3d, ".ppm");
-    char* bmp = mem_strcat(u3d, ".bmp");
-
     TRY_DO("Exporting to %s", raster_export_ppm(raster, ppm), ppm);
+    mem_free(ppm);
+#endif
+#if EXPORT_BMP
+    char* bmp = mem_strcat(u3d, ".bmp");
     TRY_DO("Exporting to %s", raster_export_bmp(raster, bmp), bmp);
+    mem_free(bmp);
+#endif
 
     mem_free(u3d);
-    mem_free(ppm);
-    mem_free(bmp);
+    raster_destroy(raster);
+}
+
+/*
+ * Render a scene that is read from standard input, and export to BMP.
+ */
+static void draw_from_stdin(const char* filename)
+{
+    scene_t* scene;
+    TRY_DO("Loading from stdin", load_from_stdin(&scene));
+
+    raster_t* raster = scene_render(scene);
+    scene_destroy(scene);
+    raster_printstats(raster);
+
+    TRY_DO("Exporting to %s", raster_export_bmp(raster, filename), filename);
+
     raster_destroy(raster);
 }
 
@@ -54,11 +97,21 @@ static void draw(const char* filename)
  */
 int main(int argc, char* argv[])
 {
-    if (argc <= 1) {
+    int out = 0;
+    int c;
+    while ((c = getopt(argc, argv, "o:")) != -1) {
+        switch (c) {
+        case 'o':
+            ++out;
+            draw_from_stdin(optarg);
+        }
+    }
+
+    if (out == 0 && argc <= 1) {
         draw("scene.u3d");
     }
     else {
-        for (int i = 1; i < argc; ++i) {
+        for (int i = optind; i < argc; ++i) {
             draw(argv[i]);
         }
     }