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 struct _egl_image_attribs
  10 {
  11    /* EGL_KHR_image_base */
  12    EGLBoolean ImagePreserved;
  13
  14    /* EGL_KHR_gl_image */
  15    EGLint GLTextureLevel;
  16    EGLint GLTextureZOffset;
  17 };
  18
  19 /**
  20  * "Base" class for device driver images.
  21  */
  22 struct _egl_image
  23 {
  24    /* An image is a display resource */
  25    _EGLResource Resource;
  26 };
  27
  28
  29 PUBLIC EGLint
  30 _eglParseImageAttribList(_EGLImageAttribs *attrs, _EGLDisplay *dpy,
  31                          const EGLint *attrib_list);
  32
  33
  34 PUBLIC EGLBoolean
  35 _eglInitImage(_EGLImage *img, _EGLDisplay *dpy);
  36
  37
  38 extern _EGLImage *
  39 _eglCreateImageKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx,
  40                    EGLenum target, EGLClientBuffer buffer, const EGLint *attr_list);
  41
  42
  43 extern EGLBoolean
  44 _eglDestroyImageKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLImage *image);
  45
  46
  47 /**
  48  * Link an image to a display and return the handle of the link.
  49  * The handle can be passed to client directly.
  50  */
  51 static INLINE EGLImageKHR
  52 _eglLinkImage(_EGLImage *img, _EGLDisplay *dpy)
  53 {
  54    _eglLinkResource(&img->Resource, _EGL_RESOURCE_IMAGE, dpy);
  55    return (EGLImageKHR) img;
  56 }
  57
  58
  59 /**
  60  * Unlink a linked image from its display.
  61  * Accessing an unlinked image should generate EGL_BAD_PARAMETER error.
  62  */
  63 static INLINE void
  64 _eglUnlinkImage(_EGLImage *img)
  65 {
  66    _eglUnlinkResource(&img->Resource, _EGL_RESOURCE_IMAGE);
  67 }
  68
  69
  70 /**
  71  * Lookup a handle to find the linked image.
  72  * Return NULL if the handle has no corresponding linked image.
  73  */
  74 static INLINE _EGLImage *
  75 _eglLookupImage(EGLImageKHR image, _EGLDisplay *dpy)
  76 {
  77    _EGLImage *img = (_EGLImage *) image;
  78    if (!dpy || !_eglCheckResource((void *) img, _EGL_RESOURCE_IMAGE, dpy))
  79       img = NULL;
  80    return img;
  81 }
  82
  83
  84 /**
  85  * Return the handle of a linked image, or EGL_NO_IMAGE_KHR.
  86  */
  87 static INLINE EGLImageKHR
  88 _eglGetImageHandle(_EGLImage *img)
  89 {
  90    _EGLResource *res = (_EGLResource *) img;
  91    return (res && _eglIsResourceLinked(res)) ?
  92       (EGLImageKHR) img : EGL_NO_IMAGE_KHR;
  93 }
  94
  95
  96 /**
  97  * Return true if the image is linked to a display.
  98  */
  99 static INLINE EGLBoolean
 100 _eglIsImageLinked(_EGLImage *img)
 101 {
 102    _EGLResource *res = (_EGLResource *) img;
 103    return (res && _eglIsResourceLinked(res));
 104 }
 105
 106
 107 #endif /* EGLIMAGE_INCLUDED */