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st/wgl: Cope with zero width/height windows.

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While ensuring the framebuffer area is never zero.
This commit is contained in:
José Fonseca 2011-04-18 16:41:25 +01:00 • committed by José Fonseca
parent ac28843c1a
commit 3f3d199121
1 changed files with 38 additions and 12 deletions
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50
src/gallium/state_trackers/wgl/stw_framebuffer.c
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@ -117,13 +117,26 @@ stw_framebuffer_get_size( struct stw_framebuffer *fb )
RECT window_rect;
POINT client_pos;
/*
* Sanity checking.
*/
assert(fb->hWnd);
/* Get the client area size. */
GetClientRect( fb->hWnd, &client_rect );
assert(fb->width && fb->height);
assert(fb->client_rect.right == fb->client_rect.left + fb->width);
assert(fb->client_rect.bottom == fb->client_rect.top + fb->height);
/*
* Get the client area size.
*/
if (!GetClientRect(fb->hWnd, &client_rect)) {
return;
}
assert(client_rect.left == 0);
assert(client_rect.top == 0);
width = client_rect.right - client_rect.left;
width = client_rect.right - client_rect.left;
height = client_rect.bottom - client_rect.top;
if (width <= 0 || height <= 0) {
@ -138,7 +151,7 @@ stw_framebuffer_get_size( struct stw_framebuffer *fb )
return;
}
if(width != fb->width || height != fb->height) {
if (width != fb->width || height != fb->height) {
fb->must_resize = TRUE;
fb->width = width;
fb->height = height;
@ -146,14 +159,14 @@ stw_framebuffer_get_size( struct stw_framebuffer *fb )
client_pos.x = 0;
client_pos.y = 0;
ClientToScreen(fb->hWnd, &client_pos);
if (ClientToScreen(fb->hWnd, &client_pos) &&
GetWindowRect(fb->hWnd, &window_rect)) {
fb->client_rect.left = client_pos.x - window_rect.left;
fb->client_rect.top = client_pos.y - window_rect.top;
}
GetWindowRect(fb->hWnd, &window_rect);
fb->client_rect.left = client_pos.x - window_rect.left;
fb->client_rect.top = client_pos.y - window_rect.top;
fb->client_rect.right = fb->client_rect.left + fb->width;
fb->client_rect.bottom = fb->client_rect.top + fb->height;
fb->client_rect.right = fb->client_rect.left + fb->width;
fb->client_rect.bottom = fb->client_rect.top + fb->height;
#if 0
debug_printf("\n");
@ -253,6 +266,19 @@ stw_framebuffer_create(
fb->refcnt = 1;
/*
* Windows can be sometimes have zero width and or height, but we ensure
* a non-zero framebuffer size at all times.
*/
fb->must_resize = TRUE;
fb->width = 1;
fb->height = 1;
fb->client_rect.left = 0;
fb->client_rect.top = 0;
fb->client_rect.right = fb->client_rect.left + fb->width;
fb->client_rect.bottom = fb->client_rect.top + fb->height;
stw_framebuffer_get_size(fb);
pipe_mutex_init( fb->mutex );