From 0e0c95e0a91069284816ad48fae7de91a166e69a Mon Sep 17 00:00:00 2001
From: Vincent Wei <vincent@minigui.org>
Date: Thu, 19 Mar 2020 22:28:55 +0800
Subject: [PATCH] tune map_buffer: add scanout argument

---
 include/exstubs.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/exstubs.h b/include/exstubs.h
index afda5076..2e5dfb45 100644
--- a/include/exstubs.h
+++ b/include/exstubs.h
@@ -127,6 +127,8 @@ typedef struct _DrmSurfaceBuffer {
     uint32_t cpp:8;
     /** Is it a dumb buffer. Since 5.0.0. */
     uint32_t dumb:1;
+    /** Is it a scanout buffer. Since 5.0.0. */
+    uint32_t scanout:1;
 
     /** The width of the buffer. */
     uint32_t width;
@@ -257,11 +259,15 @@ typedef struct _DrmDriverOps {
      * This operation maps the buffer into the current process's virtual memory
      * space, and returns the virtual address. If failed, it returns NULL.
      *
+     * When \a for_scanout is not zero, the buffer will be used for scan out
+     * frame buffer.
+     *
      * \note The driver must implement this operation. The driver must
      *  set a valid value for buff field of the DrmSurfaceBuffer object
      *  on success.
      */
-    uint8_t* (* map_buffer) (DrmDriver *driver, DrmSurfaceBuffer* buffer);
+    uint8_t* (* map_buffer) (DrmDriver *driver, DrmSurfaceBuffer* buffer,
+            int for_scanout);
 
     /**
      * This operation un-maps a buffer.