Display tweaks, add vbGetPixels()

core/vb.c

@@ -279,6 +279,46 @@ VBAPI vbOnFrame vbGetFrameCallback(VB *sim) {
     return sim->onFrame;
 }
 
+/* Retrieve the most recent frame image pixels */
+VBAPI void vbGetPixels(VB *sim, void *left, int leftStrideX, int leftStrideY,
+    void *right, int rightStrideX, int rightStrideY) {
+    uint8_t *dest;    /* Output data */
+    int      offset;  /* Horizontal offset of output pixel */
+    uint8_t *src;     /* Source data */
+    int      xStride; /* Bytes between output pixels */
+    int      yStride; /* Bytes between output lines */
+    int      i, x, y; /* Iterators */
+
+    /* Process both eyes */
+    for (i = 0; i < 2; i++) {
+
+        /* Working variables for left image */
+        if (i == 0) {
+            dest    = left;
+            xStride = leftStrideX;
+            yStride = leftStrideY;
+        }
+
+        /* Working variables for right image */
+        else {
+            dest    = right;
+            xStride = rightStrideX;
+            yStride = rightStrideY;
+        }
+
+        /* Nothing to do */
+        if (dest == NULL)
+            continue;
+
+        /* Transfer pixels to the destination */
+        src = sim->vip.frames[sim->vip.dp.buffer][i];
+        for (y = 0; y < 224; y++, dest += yStride)
+        for (x = offset = 0; x < 384; x++, offset += xStride)
+            dest[offset] = *src++;
+    }
+
+}
+
 /* Retrieve the value of the program counter */
 VBAPI uint32_t vbGetProgramCounter(VB *sim) {
     return sim->cpu.pc;