egl: Add support for EGL_KHR_image.

Individual drivers still need to implement the API hooks.

1 files changed, 95 insertions, 0 deletions

diff --git a/src/egl/main/eglimage.h b/src/egl/main/eglimage.h
new file mode 100644
index 0000000000..026b10307d
--- /dev/null
+++ b/src/egl/main/eglimage.h
@@ -0,0 +1,95 @@
+#ifndef EGLIMAGE_INCLUDED
+#define EGLIMAGE_INCLUDED
+
+
+#include "egltypedefs.h"
+#include "egldisplay.h"
+
+
+/**
+ * "Base" class for device driver images.
+ */
+struct _egl_image
+{
+   /* An image is a display resource */
+   _EGLResource Resource;
+
+   EGLBoolean Preserved;
+};
+
+
+PUBLIC EGLBoolean
+_eglInitImage(_EGLDriver *drv, _EGLImage *img, const EGLint *attrib_list);
+
+
+extern _EGLImage *
+_eglCreateImageKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx,
+                   EGLenum target, EGLClientBuffer buffer, const EGLint *attr_list);
+
+
+extern EGLBoolean
+_eglDestroyImageKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLImage *image);
+
+
+/**
+ * Link an image to a display and return the handle of the link.
+ * The handle can be passed to client directly.
+ */
+static INLINE EGLImageKHR
+_eglLinkImage(_EGLImage *img, _EGLDisplay *dpy)
+{
+   _eglLinkResource(&img->Resource, _EGL_RESOURCE_IMAGE, dpy);
+   return (EGLImageKHR) img;
+}
+
+
+/**
+ * Unlink a linked image from its display.
+ * Accessing an unlinked image should generate EGL_BAD_PARAMETER error.
+ */
+static INLINE void
+_eglUnlinkImage(_EGLImage *img)
+{
+   _eglUnlinkResource(&img->Resource, _EGL_RESOURCE_IMAGE);
+}
+
+
+/**
+ * Lookup a handle to find the linked image.
+ * Return NULL if the handle has no corresponding linked image.
+ */
+static INLINE _EGLImage *
+_eglLookupImage(EGLImageKHR image, _EGLDisplay *dpy)
+{
+   _EGLResource *res = (_EGLResource *) image;
+   _EGLImage *img = (_EGLImage *) image;
+   if (!res || !dpy || !_eglCheckResource(res, _EGL_RESOURCE_IMAGE, dpy))
+      img = NULL;
+   return img;
+}
+
+
+/**
+ * Return the handle of a linked image, or EGL_NO_IMAGE_KHR.
+ */
+static INLINE EGLImageKHR
+_eglGetImageHandle(_EGLImage *img)
+{
+   _EGLResource *res = (_EGLResource *) img;
+   return (res && _eglIsResourceLinked(res)) ?
+      (EGLImageKHR) img : EGL_NO_IMAGE_KHR;
+}
+
+
+/**
+ * Return true if the image is linked to a display.
+ */
+static INLINE EGLBoolean
+_eglIsImageLinked(_EGLImage *img)
+{
+   _EGLResource *res = (_EGLResource *) img;
+   return (res && _eglIsResourceLinked(res));
+}
+
+
+#endif /* EGLIMAGE_INCLUDED */