[Qemu-devel] [PATCH] Consolidate DisplaySurface allocation in qemu_alloc_display()

[Jes.Sorensen@redhat.com]

From: Jes Sorensen <Jes.Sorensen@redhat.com>

This removes various code duplication from console.e and sdl.c

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
---
 console.c |   45 +++++++++++++++++++++++++--------------------
 console.h |    3 +++
 ui/sdl.c  |   21 ++++++++-------------
 3 files changed, 36 insertions(+), 33 deletions(-)

diff --git a/console.c b/console.c
index 57d6eb5..4939a72 100644
--- a/console.c
+++ b/console.c
@@ -1278,35 +1278,40 @@ static DisplaySurface* defaultallocator_create_displaysurface(int width, int hei
 {
     DisplaySurface *surface = (DisplaySurface*) qemu_mallocz(sizeof(DisplaySurface));
 
-    surface->width = width;
-    surface->height = height;
-    surface->linesize = width * 4;
-    surface->pf = qemu_default_pixelformat(32);
-#ifdef HOST_WORDS_BIGENDIAN
-    surface->flags = QEMU_ALLOCATED_FLAG | QEMU_BIG_ENDIAN_FLAG;
-#else
-    surface->flags = QEMU_ALLOCATED_FLAG;
-#endif
-    surface->data = (uint8_t*) qemu_mallocz(surface->linesize * surface->height);
-
+    int linesize = width * 4;
+    surface = qemu_alloc_display(surface, width, height, linesize,
+                                 qemu_default_pixelformat(32), 0);
     return surface;
 }
 
 static DisplaySurface* defaultallocator_resize_displaysurface(DisplaySurface *surface,
                                           int width, int height)
 {
+    int linesize = width * 4;
+    surface = qemu_alloc_display(surface, width, height, linesize,
+                                 qemu_default_pixelformat(32), 0);
+    return surface;
+}
+
+DisplaySurface*
+qemu_alloc_display(DisplaySurface *surface, int width, int height,
+                   int linesize, PixelFormat pf, int newflags)
+{
+    void *data;
     surface->width = width;
     surface->height = height;
-    surface->linesize = width * 4;
-    surface->pf = qemu_default_pixelformat(32);
-    if (surface->flags & QEMU_ALLOCATED_FLAG)
-        surface->data = (uint8_t*) qemu_realloc(surface->data, surface->linesize * surface->height);
-    else
-        surface->data = (uint8_t*) qemu_malloc(surface->linesize * surface->height);
+    surface->linesize = linesize;
+    surface->pf = pf;
+    if (surface->flags & QEMU_ALLOCATED_FLAG) {
+        data = qemu_realloc(surface->data,
+                            surface->linesize * surface->height);
+    } else {
+        data = qemu_malloc(surface->linesize * surface->height);
+    }
+    surface->data = (uint8_t *)data;
+    surface->flags = newflags | QEMU_ALLOCATED_FLAG;
 #ifdef HOST_WORDS_BIGENDIAN
-    surface->flags = QEMU_ALLOCATED_FLAG | QEMU_BIG_ENDIAN_FLAG;
-#else
-    surface->flags = QEMU_ALLOCATED_FLAG;
+    surface->flags |= QEMU_BIG_ENDIAN_FLAG;
 #endif
 
     return surface;
diff --git a/console.h b/console.h
index f4e4741..dec9a76 100644
--- a/console.h
+++ b/console.h
@@ -189,6 +189,9 @@ void register_displaystate(DisplayState *ds);
 DisplayState *get_displaystate(void);
 DisplaySurface* qemu_create_displaysurface_from(int width, int height, int bpp,
                                                 int linesize, uint8_t *data);
+DisplaySurface* qemu_alloc_display(DisplaySurface *surface, int width,
+                                   int height, int linesize,
+                                   PixelFormat pf, int newflags);
 PixelFormat qemu_different_endianness_pixelformat(int bpp);
 PixelFormat qemu_default_pixelformat(int bpp);
 
diff --git a/ui/sdl.c b/ui/sdl.c
index 47ac49c..6c10ea6 100644
--- a/ui/sdl.c
+++ b/ui/sdl.c
@@ -176,23 +176,18 @@ static DisplaySurface* sdl_create_displaysurface(int width, int height)
 
     surface->width = width;
     surface->height = height;
-    
+
     if (scaling_active) {
+        int linesize;
+        PixelFormat pf;
         if (host_format.BytesPerPixel != 2 && host_format.BytesPerPixel != 4) {
-            surface->linesize = width * 4;
-            surface->pf = qemu_default_pixelformat(32);
+            linesize = width * 4;
+            pf = qemu_default_pixelformat(32);
         } else {
-            surface->linesize = width * host_format.BytesPerPixel;
-            surface->pf = sdl_to_qemu_pixelformat(&host_format);
+            linesize = width * host_format.BytesPerPixel;
+            pf = sdl_to_qemu_pixelformat(&host_format);
         }
-#ifdef HOST_WORDS_BIGENDIAN
-        surface->flags = QEMU_ALLOCATED_FLAG | QEMU_BIG_ENDIAN_FLAG;
-#else
-        surface->flags = QEMU_ALLOCATED_FLAG;
-#endif
-        surface->data = (uint8_t*) qemu_mallocz(surface->linesize * surface->height);
-
-        return surface;
+        return qemu_alloc_display(surface, width, height, linesize, pf, 0);
     }
 
     if (host_format.BitsPerPixel == 16)
-- 
1.7.4