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