From 1a5e307f7304ab998837fc2969a34811ccbec7c1 Mon Sep 17 00:00:00 2001
From: Derek Foreman <derekf@osg.samsung.com>
Date: Thu, 25 Jan 2018 17:01:23 -0600
Subject: [PATCH] ecore_wl2: Add buffer_fit API and use it from surface code

This tries to resize the buffer's useable area to fit the specified size -
this is possible if the stride of the buffer is larger than the current
width.
---
 src/lib/ecore_wl2/Ecore_Wl2.h         |  1 +
 src/lib/ecore_wl2/ecore_wl2_buffer.c  | 17 +++++++++++++++++
 src/lib/ecore_wl2/ecore_wl2_surface.c |  9 ++-------
 3 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/src/lib/ecore_wl2/Ecore_Wl2.h b/src/lib/ecore_wl2/Ecore_Wl2.h
index c1ae6f0542..1f2729e35f 100644
--- a/src/lib/ecore_wl2/Ecore_Wl2.h
+++ b/src/lib/ecore_wl2/Ecore_Wl2.h
@@ -2012,6 +2012,7 @@ EAPI void ecore_wl2_buffer_busy_set(Ecore_Wl2_Buffer *buffer);
 EAPI int ecore_wl2_buffer_age_get(Ecore_Wl2_Buffer *buffer);
 EAPI void ecore_wl2_buffer_age_set(Ecore_Wl2_Buffer *buffer, int age);
 EAPI void ecore_wl2_buffer_age_inc(Ecore_Wl2_Buffer *buffer);
+EAPI Eina_Bool ecore_wl2_buffer_fit(Ecore_Wl2_Buffer *b, int w, int h);
 
 EAPI Ecore_Wl2_Surface *ecore_wl2_surface_create(Ecore_Wl2_Window *win, Eina_Bool alpha);
 EAPI void ecore_wl2_surface_destroy(Ecore_Wl2_Surface *surface);
diff --git a/src/lib/ecore_wl2/ecore_wl2_buffer.c b/src/lib/ecore_wl2/ecore_wl2_buffer.c
index eefb0e91f3..1a9c5c5af9 100644
--- a/src/lib/ecore_wl2/ecore_wl2_buffer.c
+++ b/src/lib/ecore_wl2/ecore_wl2_buffer.c
@@ -711,6 +711,23 @@ ecore_wl2_buffer_age_inc(Ecore_Wl2_Buffer *buffer)
    buffer->age++;
 }
 
+EAPI Eina_Bool
+ecore_wl2_buffer_fit(Ecore_Wl2_Buffer *b, int w, int h)
+{
+   int stride;
+
+   EINA_SAFETY_ON_NULL_RETURN_VAL(b, EINA_FALSE);
+
+   stride = b->stride;
+   if ((w >= b->w) && (w <= stride / 4) && (h == b->h))
+     {
+        b->w = w;
+        return EINA_TRUE;
+     }
+
+   return EINA_FALSE;
+}
+
 static Ecore_Wl2_Buffer *
 _ecore_wl2_buffer_partial_create(int w, int h, Eina_Bool alpha)
 {
diff --git a/src/lib/ecore_wl2/ecore_wl2_surface.c b/src/lib/ecore_wl2/ecore_wl2_surface.c
index ae4e8099ae..bb0d87c4ae 100644
--- a/src/lib/ecore_wl2/ecore_wl2_surface.c
+++ b/src/lib/ecore_wl2/ecore_wl2_surface.c
@@ -38,14 +38,9 @@ _evas_dmabuf_surface_reconfigure(Ecore_Wl2_Surface *s, int w, int h, uint32_t fl
    if ((!w) || (!h)) return;
    EINA_LIST_FOREACH_SAFE(s->buffers, l, tmp, b)
      {
-        int stride = b->stride;
+        if (!force && ecore_wl2_buffer_fit(b, w, h))
+          continue;
 
-        /* If stride is a little bigger than width we still fit */
-        if (!force && (w >= b->w) && (w <= stride / 4) && (h == b->h))
-          {
-             b->w = w;
-             continue;
-          }
         ecore_wl2_buffer_destroy(b);
         s->buffers = eina_list_remove_list(s->buffers, l);
      }