src/egl/main/eglimage.h

   1 #ifndef EGLIMAGE_INCLUDED
   2 #define EGLIMAGE_INCLUDED
   3
   4
   5 #include "egltypedefs.h"
   6 #include "egldisplay.h"
   7
   8
   9 /**
  10  * "Base" class for device driver images.
  11  */
  12 struct _egl_image
  13 {
  14    /* An image is a display resource */
  15    _EGLResource Resource;
  16
  17    EGLBoolean Preserved;
  18 };
  19
  20
  21 PUBLIC EGLBoolean
  22 _eglInitImage(_EGLDriver *drv, _EGLImage *img, const EGLint *attrib_list);
  23
  24
  25 extern _EGLImage *
  26 _eglCreateImageKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx,
  27                    EGLenum target, EGLClientBuffer buffer, const EGLint *attr_list);
  28
  29
  30 extern EGLBoolean
  31 _eglDestroyImageKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLImage *image);
  32
  33
  34 /**
  35  * Link an image to a display and return the handle of the link.
  36  * The handle can be passed to client directly.
  37  */
  38 static INLINE EGLImageKHR
  39 _eglLinkImage(_EGLImage *img, _EGLDisplay *dpy)
  40 {
  41    _eglLinkResource(&img->Resource, _EGL_RESOURCE_IMAGE, dpy);
  42    return (EGLImageKHR) img;
  43 }
  44
  45
  46 /**
  47  * Unlink a linked image from its display.
  48  * Accessing an unlinked image should generate EGL_BAD_PARAMETER error.
  49  */
  50 static INLINE void
  51 _eglUnlinkImage(_EGLImage *img)
  52 {
  53    _eglUnlinkResource(&img->Resource, _EGL_RESOURCE_IMAGE);
  54 }
  55
  56
  57 /**
  58  * Lookup a handle to find the linked image.
  59  * Return NULL if the handle has no corresponding linked image.
  60  */
  61 static INLINE _EGLImage *
  62 _eglLookupImage(EGLImageKHR image, _EGLDisplay *dpy)
  63 {
  64    _EGLResource *res = (_EGLResource *) image;
  65    _EGLImage *img = (_EGLImage *) image;
  66    if (!res || !dpy || !_eglCheckResource(res, _EGL_RESOURCE_IMAGE, dpy))
  67       img = NULL;
  68    return img;
  69 }
  70
  71
  72 /**
  73  * Return the handle of a linked image, or EGL_NO_IMAGE_KHR.
  74  */
  75 static INLINE EGLImageKHR
  76 _eglGetImageHandle(_EGLImage *img)
  77 {
  78    _EGLResource *res = (_EGLResource *) img;
  79    return (res && _eglIsResourceLinked(res)) ?
  80       (EGLImageKHR) img : EGL_NO_IMAGE_KHR;
  81 }
  82
  83
  84 /**
  85  * Return true if the image is linked to a display.
  86  */
  87 static INLINE EGLBoolean
  88 _eglIsImageLinked(_EGLImage *img)
  89 {
  90    _EGLResource *res = (_EGLResource *) img;
  91    return (res && _eglIsResourceLinked(res));
  92 }
  93
  94
  95 #endif /* EGLIMAGE_INCLUDED */