src/mesa/state_tracker/st_cb_eglimage.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   4  *
   5  * Copyright (C) 2010 LunarG Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Chia-I Wu <olv@lunarg.com>
  27  */
  28
  29 #include "main/texobj.h"
  30 #include "main/texfetch.h"
  31 #include "main/teximage.h"
  32 #include "util/u_inlines.h"
  33 #include "util/u_format.h"
  34 #include "st_cb_eglimage.h"
  35 #include "st_cb_fbo.h"
  36 #include "st_context.h"
  37 #include "st_texture.h"
  38 #include "st_format.h"
  39 #include "st_manager.h"
  40
  41 #if FEATURE_OES_EGL_image
  42
  43 /**
  44  * Return the base format just like _mesa_base_fbo_format does.
  45  */
  46 static GLenum
  47 st_pipe_format_to_base_format(enum pipe_format format)
  48 {
  49    GLenum base_format;
  50
  51    if (util_format_is_depth_or_stencil(format)) {
  52       if (util_format_is_depth_and_stencil(format)) {
  53          base_format = GL_DEPTH_STENCIL;
  54       }
  55       else {
  56          if (format == PIPE_FORMAT_S8_USCALED)
  57             base_format = GL_STENCIL_INDEX;
  58          else
  59             base_format = GL_DEPTH_COMPONENT;
  60       }
  61    }
  62    else {
  63       /* is this enough? */
  64       if (util_format_has_alpha(format))
  65          base_format = GL_RGBA;
  66       else
  67          base_format = GL_RGB;
  68    }
  69
  70    return base_format;
  71 }
  72
  73 static void
  74 st_egl_image_target_renderbuffer_storage(GLcontext *ctx,
  75                                          struct gl_renderbuffer *rb,
  76                                          GLeglImageOES image_handle)
  77 {
  78    struct st_context *st = st_context(ctx);
  79    struct st_renderbuffer *strb = st_renderbuffer(rb);
  80    struct pipe_surface *ps;
  81    unsigned usage;
  82
  83    usage = PIPE_BIND_RENDER_TARGET;
  84    ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
  85    if (ps) {
  86       strb->Base.Width = ps->width;
  87       strb->Base.Height = ps->height;
  88       strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
  89       strb->Base.DataType = st_format_datatype(ps->format);
  90       strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
  91       strb->Base.InternalFormat = strb->Base._BaseFormat;
  92
  93       pipe_surface_reference(&strb->surface, ps);
  94       pipe_resource_reference(&strb->texture, ps->texture);
  95
  96       pipe_surface_reference(&ps, NULL);
  97    }
  98 }
  99
 100 static void
 101 st_bind_surface(GLcontext *ctx, GLenum target,
 102                 struct gl_texture_object *texObj,
 103                 struct gl_texture_image *texImage,
 104                 struct pipe_surface *ps)
 105 {
 106    struct st_texture_object *stObj;
 107    struct st_texture_image *stImage;
 108    GLenum internalFormat;
 109
 110    /* map pipe format to base format */
 111    if (util_format_get_component_bits(ps->format, UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
 112       internalFormat = GL_RGBA;
 113    else
 114       internalFormat = GL_RGB;
 115
 116    stObj = st_texture_object(texObj);
 117    stImage = st_texture_image(texImage);
 118
 119    /* switch to surface based */
 120    if (!stObj->surface_based) {
 121       _mesa_clear_texture_object(ctx, texObj);
 122       stObj->surface_based = GL_TRUE;
 123    }
 124
 125    _mesa_init_teximage_fields(ctx, target, texImage,
 126                               ps->width, ps->height, 1, 0, internalFormat);
 127    texImage->TexFormat = st_pipe_format_to_mesa_format(ps->format);
 128    _mesa_set_fetch_functions(texImage, 2);
 129
 130    /* FIXME create a non-default sampler view from the pipe_surface? */
 131    pipe_resource_reference(&stObj->pt, ps->texture);
 132    pipe_resource_reference(&stImage->pt, stObj->pt);
 133
 134    stObj->width0 = ps->width;
 135    stObj->height0 = ps->height;
 136    stObj->depth0 = 1;
 137
 138    _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
 139 }
 140
 141 static void
 142 st_egl_image_target_texture_2d(GLcontext *ctx, GLenum target,
 143                                struct gl_texture_object *texObj,
 144                                struct gl_texture_image *texImage,
 145                                GLeglImageOES image_handle)
 146 {
 147    struct st_context *st = st_context(ctx);
 148    struct pipe_surface *ps;
 149    unsigned usage;
 150
 151    usage = PIPE_BIND_SAMPLER_VIEW;
 152    ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
 153    if (ps) {
 154       st_bind_surface(ctx, target, texObj, texImage, ps);
 155       pipe_surface_reference(&ps, NULL);
 156    }
 157 }
 158
 159 void
 160 st_init_eglimage_functions(struct dd_function_table *functions)
 161 {
 162    functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
 163    functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
 164 }
 165
 166 #endif /* FEATURE_OES_EGL_image */