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