storyboard.c: add decorations around thumbnails

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3352 92316355-f0b4-4df1-b90c-862c8a59935f

examples/storyboard.c

@@ -24,7 +24,7 @@
 
 #include <pipi.h>
 
-#define STEP 15
+#define STEP 12
 
 #define TWIDTH 90
 #define THEIGHT 60
@@ -33,6 +33,7 @@
 #define NTHUMBS (TCOLS*TROWS)
 
 static int similar(uint8_t *img1, uint8_t *img2);
+static void decorate(uint8_t *img);
 
 int main(int argc, char *argv[])
 {
@@ -135,6 +136,8 @@ int main(int argc, char *argv[])
             sws_scale(sws, frame->data, frame->linesize, 0, ctx->height,
                       &start, &pitch);
 
+            decorate(start);
+
             if(idx > 0)
             {
                 uint8_t *prev;
@@ -167,8 +170,8 @@ static int similar(uint8_t *img1, uint8_t *img2)
 {
     int x, y, t, a, b, changed = 0;
 
-    for(y = 1; y < THEIGHT - 1; y++)
-        for(x = 1; x < TWIDTH - 1; x++)
+    for(y = 2; y < THEIGHT - 2; y++)
+        for(x = 2; x < TWIDTH - 2; x++)
         {
             int offset = y * TWIDTH * TCOLS + x;
             int ok = 0;
@@ -210,3 +213,47 @@ static int similar(uint8_t *img1, uint8_t *img2)
     return changed < (TWIDTH * THEIGHT * 10 / 100);
 }
 
+static void decorate(uint8_t *img)
+{
+    static int const hi = 200;
+    static int const lo = 50;
+    static int const mid = (hi + lo) / 2;
+    int x, y;
+
+    for(y = 0; y < THEIGHT; y++)
+    {
+        img[(y * TWIDTH * TCOLS) * 4] = hi;
+        img[(y * TWIDTH * TCOLS) * 4 + 1] = hi;
+        img[(y * TWIDTH * TCOLS) * 4 + 2] = hi;
+        img[(y * TWIDTH * TCOLS + TWIDTH - 1) * 4] = lo;
+        img[(y * TWIDTH * TCOLS + TWIDTH - 1) * 4 + 1] = lo;
+        img[(y * TWIDTH * TCOLS + TWIDTH - 1) * 4 + 2] = lo;
+    }
+
+    for(x = 0; x < TWIDTH; x++)
+    {
+        img[x * 4] = hi;
+        img[x * 4 + 1] = hi;
+        img[x * 4 + 2] = hi;
+        img[((THEIGHT - 1) * TWIDTH * TCOLS + x) * 4] = lo;
+        img[((THEIGHT - 1) * TWIDTH * TCOLS + x) * 4 + 1] = lo;
+        img[((THEIGHT - 1) * TWIDTH * TCOLS + x) * 4 + 2] = lo;
+    }
+
+    img[0] = (mid + hi) / 2;
+    img[1] = (mid + hi) / 2;
+    img[2] = (mid + hi) / 2;
+
+    img[(TWIDTH - 1) * 4 + 0] = mid;
+    img[(TWIDTH - 1) * 4 + 1] = mid;
+    img[(TWIDTH - 1) * 4 + 2] = mid;
+
+    img[((THEIGHT - 1) * TWIDTH * TCOLS) * 4 + 0] = mid;
+    img[((THEIGHT - 1) * TWIDTH * TCOLS) * 4 + 1] = mid;
+    img[((THEIGHT - 1) * TWIDTH * TCOLS) * 4 + 2] = mid;
+
+    img[((THEIGHT - 1) * TWIDTH * TCOLS + TWIDTH - 1) * 4 + 0] = (mid + lo) / 2;
+    img[((THEIGHT - 1) * TWIDTH * TCOLS + TWIDTH - 1) * 4 + 1] = (mid + lo) / 2;
+    img[((THEIGHT - 1) * TWIDTH * TCOLS + TWIDTH - 1) * 4 + 2] = (mid + lo) / 2;
+}
+