[Qemu-devel] [PATCH] Fix g364fb video emulation

["Hervé Poussineau" <hpoussin@reactos.org>]

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Hi,

Attached patches fixes screen resolution handling for g364 graphic card.
It removes last_scr_width/last_scr_height whose role was not very clear,
and uses qemu_console_resize(), added in r4812.

Hervé

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Index: hw/g364fb.c
===================================================================
--- hw/g364fb.c	(revision 5013)
+++ hw/g364fb.c	(working copy)
@@ -36,7 +36,6 @@
     QEMUConsole *console;
     int graphic_mode;
     uint32_t scr_width, scr_height; /* in pixels */
-    uint32_t last_scr_width, last_scr_height; /* in pixels */
 } G364State;
 
 /*
@@ -73,9 +72,6 @@
 
 static void g364fb_draw_graphic(G364State *s, int full_update)
 {
-    if (s->scr_width == 0 || s->scr_height == 0)
-        return;
-
     switch (s->ds->depth) {
         case 8:
             g364fb_draw_graphic8(s, full_update);
@@ -94,7 +90,7 @@
             return;
     }
 
-    dpy_update(s->ds, 0, 0, s->last_scr_width, s->last_scr_height);
+    dpy_update(s->ds, 0, 0, s->scr_width, s->scr_height);
 }
 
 static void g364fb_draw_blank(G364State *s, int full_update)
@@ -104,17 +100,15 @@
 
     if (!full_update)
         return;
-    if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
-        return;
 
-    w = s->last_scr_width * ((s->ds->depth + 7) >> 3);
+    w = s->scr_width * ((s->ds->depth + 7) >> 3);
     d = s->ds->data;
-    for(i = 0; i < s->last_scr_height; i++) {
+    for(i = 0; i < s->scr_height; i++) {
         memset(d, 0, w);
         d += s->ds->linesize;
     }
-    dpy_update(s->ds, 0, 0,
-               s->last_scr_width, s->last_scr_height);
+
+    dpy_update(s->ds, 0, 0, s->scr_width, s->scr_height);
 }
 
 #define GMODE_GRAPH 0
@@ -125,6 +119,9 @@
     G364State *s = opaque;
     int full_update, graphic_mode;
 
+    if (s->scr_width == 0 || s->scr_height == 0)
+        return;
+
     if (s->ctla & CTLA_FORCE_BLANK)
         graphic_mode = GMODE_BLANK;
     else
@@ -134,6 +131,10 @@
         s->graphic_mode = graphic_mode;
         full_update = 1;
     }
+    if (s->scr_width != s->ds->width || s->scr_height != s->ds->height) {
+        qemu_console_resize(s->console, s->scr_width, s->scr_height);
+        full_update = 1;
+    }
     switch(graphic_mode) {
         case GMODE_GRAPH:
             g364fb_draw_graphic(s, full_update);
@@ -158,7 +159,6 @@
 
     memset(s->palette, 0, sizeof(s->palette));
     s->scr_width = s->scr_height = 0;
-    s->last_scr_width = s->last_scr_height = 0;
     memset(s->vram_buffer, 0, s->vram_size);
     s->graphic_mode = -1; /* force full update */
 }
@@ -266,8 +266,6 @@
 #endif
                 break;
         }
-        if (s->scr_width && s->scr_height)
-            qemu_console_resize(s->console, s->scr_width, s->scr_height);
     }
     s->graphic_mode = -1; /* force full update */
 }
Index: hw/g364fb_template.h
===================================================================
--- hw/g364fb_template.h	(revision 5013)
+++ hw/g364fb_template.h	(working copy)
@@ -27,11 +27,11 @@
     uint8_t *data_display, *dd;
 
     data_buffer = s->vram_buffer;
-    w_display = s->last_scr_width * PIXEL_WIDTH / 8;
+    w_display = s->scr_width * PIXEL_WIDTH / 8;
     data_display = s->ds->data;
-    for(i = 0; i < s->last_scr_height; i++) {
+    for(i = 0; i < s->scr_height; i++) {
         dd = data_display;
-        for (j = 0; j < s->last_scr_width; j++, dd += PIXEL_WIDTH / 8, data_buffer++) {
+        for (j = 0; j < s->scr_width; j++, dd += PIXEL_WIDTH / 8, data_buffer++) {
             uint8_t index = *data_buffer;
             *((glue(glue(uint, PIXEL_WIDTH), _t) *)dd) = glue(rgb_to_pixel, BPP)(
                 s->palette[index][0],