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authorChia-I Wu <[email protected]>2009-10-15 11:08:48 +0800
committerBrian Paul <[email protected]>2009-10-15 12:54:00 -0600
commit57da499d7ba074128e8c97b8076805e403a2b9c4 (patch)
treea26240bf9db31a1367da6d2e08583a47b02d27d4 /src/egl/main/eglsurface.c
parentbbfd0e26151bef567c152c8018ecc15f04c70914 (diff)
egl: Rework eglSwapInterval.
This adds error checking to eglSwapInterval and clamps the swap interval. Signed-off-by: Chia-I Wu <[email protected]>
Diffstat (limited to 'src/egl/main/eglsurface.c')
-rw-r--r--src/egl/main/eglsurface.c27
1 files changed, 22 insertions, 5 deletions
diff --git a/src/egl/main/eglsurface.c b/src/egl/main/eglsurface.c
index e7a1a8329e1..940a1b760cf 100644
--- a/src/egl/main/eglsurface.c
+++ b/src/egl/main/eglsurface.c
@@ -15,6 +15,22 @@
#include "eglsurface.h"
+static void
+_eglClampSwapInterval(_EGLSurface *surf, EGLint interval)
+{
+ EGLint bound = GET_CONFIG_ATTRIB(surf->Config, EGL_MAX_SWAP_INTERVAL);
+ if (interval >= bound) {
+ interval = bound;
+ }
+ else {
+ bound = GET_CONFIG_ATTRIB(surf->Config, EGL_MIN_SWAP_INTERVAL);
+ if (interval < bound)
+ interval = bound;
+ }
+ surf->SwapInterval = interval;
+}
+
+
/**
* Do error check on parameters and initialize the given _EGLSurface object.
* \return EGL_TRUE if no errors, EGL_FALSE otherwise.
@@ -194,7 +210,9 @@ _eglInitSurface(_EGLDriver *drv, _EGLSurface *surf, EGLint type,
surf->TextureTarget = texTarget;
surf->MipmapTexture = mipmapTex;
surf->MipmapLevel = 0;
- surf->SwapInterval = 0;
+ /* the default swap interval is 1 */
+ _eglClampSwapInterval(surf, 1);
+
#ifdef EGL_VERSION_1_2
surf->SwapBehavior = EGL_BUFFER_DESTROYED; /* XXX ok? */
surf->HorizontalResolution = EGL_UNKNOWN; /* set by caller */
@@ -466,11 +484,10 @@ _eglReleaseTexImage(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surface,
EGLBoolean
-_eglSwapInterval(_EGLDriver *drv, _EGLDisplay *dpy, EGLint interval)
+_eglSwapInterval(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
+ EGLint interval)
{
- _EGLSurface *surf = _eglGetCurrentSurface(EGL_DRAW);
- if (surf)
- surf->SwapInterval = interval;
+ _eglClampSwapInterval(surf, interval);
return EGL_TRUE;
}