src/egl/main/eglimage.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2009-2010 Chia-I Wu <olvaffe@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
  55 /**
  56  * "Base" class for device driver images.
  57  */
  58 struct _egl_image
  59 {
  60    /* An image is a display resource */
  61    _EGLResource Resource;
  62 };
  63
  64
  65 PUBLIC EGLint
  66 _eglParseImageAttribList(_EGLImageAttribs *attrs, _EGLDisplay *dpy,
  67                          const EGLint *attrib_list);
  68
  69
  70 PUBLIC EGLBoolean
  71 _eglInitImage(_EGLImage *img, _EGLDisplay *dpy);
  72
  73
  74 /**
  75  * Increment reference count for the image.
  76  */
  77 static INLINE _EGLImage *
  78 _eglGetImage(_EGLImage *img)
  79 {
  80    if (img)
  81       _eglGetResource(&img->Resource);
  82    return img;
  83 }
  84
  85
  86 /**
  87  * Decrement reference count for the image.
  88  */
  89 static INLINE EGLBoolean
  90 _eglPutImage(_EGLImage *img)
  91 {
  92    return (img) ? _eglPutResource(&img->Resource) : EGL_FALSE;
  93 }
  94
  95
  96 /**
  97  * Link an image to its display and return the handle of the link.
  98  * The handle can be passed to client directly.
  99  */
 100 static INLINE EGLImageKHR
 101 _eglLinkImage(_EGLImage *img)
 102 {
 103    _eglLinkResource(&img->Resource, _EGL_RESOURCE_IMAGE);
 104    return (EGLImageKHR) img;
 105 }
 106
 107
 108 /**
 109  * Unlink a linked image from its display.
 110  * Accessing an unlinked image should generate EGL_BAD_PARAMETER error.
 111  */
 112 static INLINE void
 113 _eglUnlinkImage(_EGLImage *img)
 114 {
 115    _eglUnlinkResource(&img->Resource, _EGL_RESOURCE_IMAGE);
 116 }
 117
 118
 119 /**
 120  * Lookup a handle to find the linked image.
 121  * Return NULL if the handle has no corresponding linked image.
 122  */
 123 static INLINE _EGLImage *
 124 _eglLookupImage(EGLImageKHR image, _EGLDisplay *dpy)
 125 {
 126    _EGLImage *img = (_EGLImage *) image;
 127    if (!dpy || !_eglCheckResource((void *) img, _EGL_RESOURCE_IMAGE, dpy))
 128       img = NULL;
 129    return img;
 130 }
 131
 132
 133 /**
 134  * Return the handle of a linked image, or EGL_NO_IMAGE_KHR.
 135  */
 136 static INLINE EGLImageKHR
 137 _eglGetImageHandle(_EGLImage *img)
 138 {
 139    _EGLResource *res = (_EGLResource *) img;
 140    return (res && _eglIsResourceLinked(res)) ?
 141       (EGLImageKHR) img : EGL_NO_IMAGE_KHR;
 142 }
 143
 144
 145 #endif /* EGLIMAGE_INCLUDED */