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      1 /**************************************************************************
      2  *
      3  * Copyright 2009-2010 Chia-I Wu <olvaffe (at) gmail.com>
      4  * Copyright 2010-2011 LunarG, Inc.
      5  * All Rights Reserved.
      6  *
      7  * Permission is hereby granted, free of charge, to any person obtaining a
      8  * copy of this software and associated documentation files (the
      9  * "Software"), to deal in the Software without restriction, including
     10  * without limitation the rights to use, copy, modify, merge, publish,
     11  * distribute, sub license, and/or sell copies of the Software, and to
     12  * permit persons to whom the Software is furnished to do so, subject to
     13  * the following conditions:
     14  *
     15  * The above copyright notice and this permission notice (including the
     16  * next paragraph) shall be included in all copies or substantial portions
     17  * of the Software.
     18  *
     19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     22  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     24  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     25  * DEALINGS IN THE SOFTWARE.
     26  *
     27  **************************************************************************/
     28 
     29 
     30 #ifndef EGLIMAGE_INCLUDED
     31 #define EGLIMAGE_INCLUDED
     32 
     33 
     34 #include "egltypedefs.h"
     35 #include "egldisplay.h"
     36 
     37 
     38 struct _egl_image_attribs
     39 {
     40    /* EGL_KHR_image_base */
     41    EGLBoolean ImagePreserved;
     42 
     43    /* EGL_KHR_gl_image */
     44    EGLint GLTextureLevel;
     45    EGLint GLTextureZOffset;
     46 
     47    /* EGL_MESA_drm_image */
     48    EGLint Width;
     49    EGLint Height;
     50    EGLint DRMBufferFormatMESA;
     51    EGLint DRMBufferUseMESA;
     52    EGLint DRMBufferStrideMESA;
     53 
     54    /* EGL_WL_bind_wayland_display */
     55    EGLint PlaneWL;
     56 };
     57 
     58 /**
     59  * "Base" class for device driver images.
     60  */
     61 struct _egl_image
     62 {
     63    /* An image is a display resource */
     64    _EGLResource Resource;
     65 };
     66 
     67 
     68 PUBLIC EGLint
     69 _eglParseImageAttribList(_EGLImageAttribs *attrs, _EGLDisplay *dpy,
     70                          const EGLint *attrib_list);
     71 
     72 
     73 PUBLIC EGLBoolean
     74 _eglInitImage(_EGLImage *img, _EGLDisplay *dpy);
     75 
     76 
     77 /**
     78  * Increment reference count for the image.
     79  */
     80 static INLINE _EGLImage *
     81 _eglGetImage(_EGLImage *img)
     82 {
     83    if (img)
     84       _eglGetResource(&img->Resource);
     85    return img;
     86 }
     87 
     88 
     89 /**
     90  * Decrement reference count for the image.
     91  */
     92 static INLINE EGLBoolean
     93 _eglPutImage(_EGLImage *img)
     94 {
     95    return (img) ? _eglPutResource(&img->Resource) : EGL_FALSE;
     96 }
     97 
     98 
     99 /**
    100  * Link an image to its display and return the handle of the link.
    101  * The handle can be passed to client directly.
    102  */
    103 static INLINE EGLImageKHR
    104 _eglLinkImage(_EGLImage *img)
    105 {
    106    _eglLinkResource(&img->Resource, _EGL_RESOURCE_IMAGE);
    107    return (EGLImageKHR) img;
    108 }
    109 
    110 
    111 /**
    112  * Unlink a linked image from its display.
    113  * Accessing an unlinked image should generate EGL_BAD_PARAMETER error.
    114  */
    115 static INLINE void
    116 _eglUnlinkImage(_EGLImage *img)
    117 {
    118    _eglUnlinkResource(&img->Resource, _EGL_RESOURCE_IMAGE);
    119 }
    120 
    121 
    122 /**
    123  * Lookup a handle to find the linked image.
    124  * Return NULL if the handle has no corresponding linked image.
    125  */
    126 static INLINE _EGLImage *
    127 _eglLookupImage(EGLImageKHR image, _EGLDisplay *dpy)
    128 {
    129    _EGLImage *img = (_EGLImage *) image;
    130    if (!dpy || !_eglCheckResource((void *) img, _EGL_RESOURCE_IMAGE, dpy))
    131       img = NULL;
    132    return img;
    133 }
    134 
    135 
    136 /**
    137  * Return the handle of a linked image, or EGL_NO_IMAGE_KHR.
    138  */
    139 static INLINE EGLImageKHR
    140 _eglGetImageHandle(_EGLImage *img)
    141 {
    142    _EGLResource *res = (_EGLResource *) img;
    143    return (res && _eglIsResourceLinked(res)) ?
    144       (EGLImageKHR) img : EGL_NO_IMAGE_KHR;
    145 }
    146 
    147 
    148 #endif /* EGLIMAGE_INCLUDED */
    149