drm: add zbuffer_test

drm/pumpkin_man.c

@@ -1100,11 +1100,12 @@ int main()
 
   void * colorbuffer_ptr[2];
   void * vertexbuffer_ptr;
+  void * zbuffer_ptr;
 
   // colorbuffer
   colorbuffer_handle[0] = create_colorbuffer(fd, colorbuffer_size, &colorbuffer_ptr[0]);
   colorbuffer_handle[1] = create_colorbuffer(fd, colorbuffer_size, &colorbuffer_ptr[1]);
-  zbuffer_handle = create_colorbuffer(fd, colorbuffer_size, NULL);
+  zbuffer_handle = create_colorbuffer(fd, colorbuffer_size, &zbuffer_ptr);
   vertexbuffer_handle = create_colorbuffer(fd, vertexbuffer_size, &vertexbuffer_ptr);
 
   fprintf(stderr, "colorbuffer handle[0] %d\n", colorbuffer_handle[0]);
@@ -1268,6 +1269,7 @@ int main()
     theta += 0.01f;
     colorbuffer_ix = (colorbuffer_ix + 1) & 1;
 
+    break;
   }
 
   {
@@ -1286,5 +1288,13 @@ int main()
     close(out_fd);
   }
 
+  {
+    int out_fd = open("zbuffer.data", O_RDWR|O_CREAT, 0644);
+    assert(out_fd >= 0);
+    ssize_t write_length = write(out_fd, zbuffer_ptr, colorbuffer_size);
+    assert(write_length == colorbuffer_size);
+    close(out_fd);
+  }
+
   close(fd);
 }

drm/zbuffer_test.fs.asm

@@ -0,0 +1,4 @@
+OUT TEX_SEM_WAIT
+src0.rgb = temp[0] :
+  out[0].a    = MAX src0.1 src0.1 ,
+  out[0].rgb  = MAX src0.rgb src0.rgb ;

drm/zbuffer_test.fs.inc

@@ -0,0 +1,7 @@
+0x00078005,
+0x08020000,
+0x08020080,
+0x00440220,
+0x00c18003,
+0x00000005,
+

drm/zbuffer_test.vs.asm

@@ -0,0 +1,2 @@
+out[0].xyzw = VE_MAD input[0].xyzz input[0].1111 const[0].0001 ;
+out[1].xyzw = VE_ADD input[0].xyz1 const[0].0000 ;

drm/zbuffer_test.vs.inc

@@ -0,0 +1,2 @@
+0x00f00204, 0x00910001, 0x016da001, 0x01648002,
+0x00f02203, 0x01510001, 0x01248002, 0x01ffe002,