optimize screendump for the common non-switch case

switch console only if needed, also pass down whenever the console was
switched or not because a displaysurface redraw is only needed in case
the console was switched.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

7 files changed, 26 insertions, 17 deletions

diff --git a/hw/blizzard.c b/hw/blizzard.c
index b2c1b22844..c7d844d105 100644
--- a/hw/blizzard.c
+++ b/hw/blizzard.c
@@ -932,10 +932,14 @@ static void blizzard_update_display(void *opaque)
     s->my[1] = 0;
 }
 
-static void blizzard_screen_dump(void *opaque, const char *filename) {
+static void blizzard_screen_dump(void *opaque, const char *filename,
+                                 bool cswitch)
+{
     BlizzardState *s = (BlizzardState *) opaque;
 
-    blizzard_update_display(opaque);
+    if (cswitch) {
+        blizzard_update_display(opaque);
+    }
     if (s && ds_get_data(s->state))
         ppm_save(filename, s->state->surface);
 }
diff --git a/hw/g364fb.c b/hw/g364fb.c
index 9c63bddc59..3a0b68fbae 100644
--- a/hw/g364fb.c
+++ b/hw/g364fb.c
@@ -289,7 +289,7 @@ static void g364fb_reset(G364State *s)
     g364fb_invalidate_display(s);
 }
 
-static void g364fb_screen_dump(void *opaque, const char *filename)
+static void g364fb_screen_dump(void *opaque, const char *filename, bool cswitch)
 {
     G364State *s = opaque;
     int y, x;
diff --git a/hw/omap_lcdc.c b/hw/omap_lcdc.c
index f265306556..f172093876 100644
--- a/hw/omap_lcdc.c
+++ b/hw/omap_lcdc.c
@@ -264,9 +264,12 @@ static int ppm_save(const char *filename, uint8_t *data,
     return 0;
 }
 
-static void omap_screen_dump(void *opaque, const char *filename) {
+static void omap_screen_dump(void *opaque, const char *filename, bool cswitch)
+{
     struct omap_lcd_panel_s *omap_lcd = opaque;
-    omap_update_display(opaque);
+    if (cswitch) {
+        omap_update_display(opaque);
+    }
     if (omap_lcd && ds_get_data(omap_lcd->state))
         ppm_save(filename, ds_get_data(omap_lcd->state),
                 omap_lcd->width, omap_lcd->height,
diff --git a/hw/qxl.c b/hw/qxl.c
index 87ad49ad8b..f643667205 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -1436,7 +1436,7 @@ static void qxl_hw_invalidate(void *opaque)
     vga->invalidate(vga);
 }
 
-static void qxl_hw_screen_dump(void *opaque, const char *filename)
+static void qxl_hw_screen_dump(void *opaque, const char *filename, bool cswitch)
 {
     PCIQXLDevice *qxl = opaque;
     VGACommonState *vga = &qxl->vga;
@@ -1448,7 +1448,7 @@ static void qxl_hw_screen_dump(void *opaque, const char *filename)
         ppm_save(filename, qxl->ssd.ds->surface);
         break;
     case QXL_MODE_VGA:
-        vga->screen_dump(vga, filename);
+        vga->screen_dump(vga, filename, cswitch);
         break;
     default:
         break;
diff --git a/hw/tcx.c b/hw/tcx.c
index 2b66d8619e..ac7dcb428c 100644
--- a/hw/tcx.c
+++ b/hw/tcx.c
@@ -56,8 +56,8 @@ typedef struct TCXState {
     uint8_t dac_index, dac_state;
 } TCXState;
 
-static void tcx_screen_dump(void *opaque, const char *filename);
-static void tcx24_screen_dump(void *opaque, const char *filename);
+static void tcx_screen_dump(void *opaque, const char *filename, bool cswitch);
+static void tcx24_screen_dump(void *opaque, const char *filename, bool cswitch);
 
 static void tcx_set_dirty(TCXState *s)
 {
@@ -574,7 +574,7 @@ static int tcx_init1(SysBusDevice *dev)
     return 0;
 }
 
-static void tcx_screen_dump(void *opaque, const char *filename)
+static void tcx_screen_dump(void *opaque, const char *filename, bool cswitch)
 {
     TCXState *s = opaque;
     FILE *f;
@@ -601,7 +601,7 @@ static void tcx_screen_dump(void *opaque, const char *filename)
     return;
 }
 
-static void tcx24_screen_dump(void *opaque, const char *filename)
+static void tcx24_screen_dump(void *opaque, const char *filename, bool cswitch)
 {
     TCXState *s = opaque;
     FILE *f;
diff --git a/hw/vga.c b/hw/vga.c
index f8f30f8003..5994f43b75 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -162,7 +162,7 @@ static uint32_t expand4[256];
 static uint16_t expand2[256];
 static uint8_t expand4to8[16];
 
-static void vga_screen_dump(void *opaque, const char *filename);
+static void vga_screen_dump(void *opaque, const char *filename, bool cswitch);
 
 static void vga_update_memory_access(VGACommonState *s)
 {
@@ -2407,11 +2407,13 @@ int ppm_save(const char *filename, struct DisplaySurface *ds)
 
 /* save the vga display in a PPM image even if no display is
    available */
-static void vga_screen_dump(void *opaque, const char *filename)
+static void vga_screen_dump(void *opaque, const char *filename, bool cswitch)
 {
     VGACommonState *s = opaque;
 
-    vga_invalidate_display(s);
-    vga_hw_update();
+    if (cswitch) {
+        vga_invalidate_display(s);
+        vga_hw_update();
+    }
     ppm_save(filename, s->ds->surface);
 }
diff --git a/hw/vmware_vga.c b/hw/vmware_vga.c
index f8afa3c367..142d9f4ea0 100644
--- a/hw/vmware_vga.c
+++ b/hw/vmware_vga.c
@@ -1003,11 +1003,11 @@ static void vmsvga_invalidate_display(void *opaque)
 
 /* save the vga display in a PPM image even if no display is
    available */
-static void vmsvga_screen_dump(void *opaque, const char *filename)
+static void vmsvga_screen_dump(void *opaque, const char *filename, bool cswitch)
 {
     struct vmsvga_state_s *s = opaque;
     if (!s->enable) {
-        s->vga.screen_dump(&s->vga, filename);
+        s->vga.screen_dump(&s->vga, filename, cswitch);
         return;
     }