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  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.    /* 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.