[Mesa-dev] [PATCH v2 1/2] vl: Add rotation

[Kusanagi Kouichi]

Signed-off-by: Kusanagi Kouichi <slash at ac.auone-net.jp>
---
 src/gallium/auxiliary/vl/vl_compositor.c | 64 ++++++++++++++++++++++++++++----
 src/gallium/auxiliary/vl/vl_compositor.h | 18 +++++++++
 2 files changed, 74 insertions(+), 8 deletions(-)

diff --git a/src/gallium/auxiliary/vl/vl_compositor.c b/src/gallium/auxiliary/vl/vl_compositor.c
index 3cea044..ad08b52 100644
--- a/src/gallium/auxiliary/vl/vl_compositor.c
+++ b/src/gallium/auxiliary/vl/vl_compositor.c
@@ -577,10 +577,48 @@ calc_src_and_dst(struct vl_compositor_layer *layer, unsigned width, unsigned hei
 static void
 gen_rect_verts(struct vertex2f *vb, struct vl_compositor_layer *layer)
 {
+   struct vertex2f tl, tr, br, bl;
+
    assert(vb && layer);
 
-   vb[ 0].x = layer->dst.tl.x;
-   vb[ 0].y = layer->dst.tl.y;
+   switch (layer->rotate) {
+   default:
+   case VL_COMPOSITOR_ROTATE_0:
+      tl = layer->dst.tl;
+      tr.x = layer->dst.br.x;
+      tr.y = layer->dst.tl.y;
+      br = layer->dst.br;
+      bl.x = layer->dst.tl.x;
+      bl.y = layer->dst.br.y;
+      break;
+   case VL_COMPOSITOR_ROTATE_90:
+      tl.x = layer->dst.br.x;
+      tl.y = layer->dst.tl.y;
+      tr = layer->dst.br;
+      br.x = layer->dst.tl.x;
+      br.y = layer->dst.br.y;
+      bl = layer->dst.tl;
+      break;
+   case VL_COMPOSITOR_ROTATE_180:
+      tl = layer->dst.br;
+      tr.x = layer->dst.tl.x;
+      tr.y = layer->dst.br.y;
+      br = layer->dst.tl;
+      bl.x = layer->dst.br.x;
+      bl.y = layer->dst.tl.y;
+      break;
+   case VL_COMPOSITOR_ROTATE_270:
+      tl.x = layer->dst.tl.x;
+      tl.y = layer->dst.br.y;
+      tr = layer->dst.tl;
+      br.x = layer->dst.br.x;
+      br.y = layer->dst.tl.y;
+      bl = layer->dst.br;
+      break;
+   }
+
+   vb[ 0].x = tl.x;
+   vb[ 0].y = tl.y;
    vb[ 1].x = layer->src.tl.x;
    vb[ 1].y = layer->src.tl.y;
    vb[ 2] = layer->zw;
@@ -589,8 +627,8 @@ gen_rect_verts(struct vertex2f *vb, struct vl_compositor_layer *layer)
    vb[ 4].x = layer->colors[0].z;
    vb[ 4].y = layer->colors[0].w;
 
-   vb[ 5].x = layer->dst.br.x;
-   vb[ 5].y = layer->dst.tl.y;
+   vb[ 5].x = tr.x;
+   vb[ 5].y = tr.y;
    vb[ 6].x = layer->src.br.x;
    vb[ 6].y = layer->src.tl.y;
    vb[ 7] = layer->zw;
@@ -599,8 +637,8 @@ gen_rect_verts(struct vertex2f *vb, struct vl_compositor_layer *layer)
    vb[ 9].x = layer->colors[1].z;
    vb[ 9].y = layer->colors[1].w;
 
-   vb[10].x = layer->dst.br.x;
-   vb[10].y = layer->dst.br.y;
+   vb[10].x = br.x;
+   vb[10].y = br.y;
    vb[11].x = layer->src.br.x;
    vb[11].y = layer->src.br.y;
    vb[12] = layer->zw;
@@ -609,8 +647,8 @@ gen_rect_verts(struct vertex2f *vb, struct vl_compositor_layer *layer)
    vb[14].x = layer->colors[2].z;
    vb[14].y = layer->colors[2].w;
 
-   vb[15].x = layer->dst.tl.x;
-   vb[15].y = layer->dst.br.y;
+   vb[15].x = bl.x;
+   vb[15].y = bl.y;
    vb[16].x = layer->src.tl.x;
    vb[16].y = layer->src.br.y;
    vb[17] = layer->zw;
@@ -964,6 +1002,16 @@ vl_compositor_set_rgba_layer(struct vl_compositor_state *s,
 }
 
 void
+vl_compositor_set_layer_rotation(struct vl_compositor_state *s,
+                                 unsigned layer,
+                                 enum vl_compositor_rotation rotate)
+{
+   assert(s);
+   assert(layer < VL_COMPOSITOR_MAX_LAYERS);
+   s->layers[layer].rotate = rotate;
+}
+
+void
 vl_compositor_render(struct vl_compositor_state *s,
                      struct vl_compositor       *c,
                      struct pipe_surface        *dst_surface,
diff --git a/src/gallium/auxiliary/vl/vl_compositor.h b/src/gallium/auxiliary/vl/vl_compositor.h
index 97cbef0..934b634 100644
--- a/src/gallium/auxiliary/vl/vl_compositor.h
+++ b/src/gallium/auxiliary/vl/vl_compositor.h
@@ -53,6 +53,15 @@ enum vl_compositor_deinterlace
    VL_COMPOSITOR_BOB_BOTTOM
 };
 
+/* clockwise degree */
+enum vl_compositor_rotation
+{
+   VL_COMPOSITOR_ROTATE_0,
+   VL_COMPOSITOR_ROTATE_90,
+   VL_COMPOSITOR_ROTATE_180,
+   VL_COMPOSITOR_ROTATE_270
+};
+
 struct vl_compositor_layer
 {
    bool clearing;
@@ -70,6 +79,7 @@ struct vl_compositor_layer
    } src, dst;
    struct vertex2f zw;
    struct vertex4f colors[4];
+   enum vl_compositor_rotation rotate;
 };
 
 struct vl_compositor_state
@@ -216,6 +226,14 @@ vl_compositor_set_rgba_layer(struct vl_compositor_state *state,
                              struct u_rect *dst_rect,
                              struct vertex4f *colors);
 
+/**
+ * set the layer rotation
+ */
+void
+vl_compositor_set_layer_rotation(struct vl_compositor_state *state,
+                                 unsigned layer,
+                                 enum vl_compositor_rotation rotate);
+
 /*@}*/
 
 /**
-- 
1.9.0