src/mesa/state_tracker/st_cb_eglimage.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2010 LunarG Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Chia-I Wu <olv@lunarg.com>
  26  */
  27
  28 #include "main/texobj.h"
  29 #include "main/teximage.h"
  30 #include "util/u_inlines.h"
  31 #include "util/u_format.h"
  32 #include "st_cb_eglimage.h"
  33 #include "st_cb_fbo.h"
  34 #include "st_context.h"
  35 #include "st_texture.h"
  36 #include "st_format.h"
  37 #include "st_manager.h"
  38
  39 /**
  40  * Return the base format just like _mesa_base_fbo_format does.
  41  */
  42 static GLenum
  43 st_pipe_format_to_base_format(enum pipe_format format)
  44 {
  45    GLenum base_format;
  46
  47    if (util_format_is_depth_or_stencil(format)) {
  48       if (util_format_is_depth_and_stencil(format)) {
  49          base_format = GL_DEPTH_STENCIL;
  50       }
  51       else {
  52          if (format == PIPE_FORMAT_S8_UINT)
  53             base_format = GL_STENCIL_INDEX;
  54          else
  55             base_format = GL_DEPTH_COMPONENT;
  56       }
  57    }
  58    else {
  59       /* is this enough? */
  60       if (util_format_has_alpha(format))
  61          base_format = GL_RGBA;
  62       else
  63          base_format = GL_RGB;
  64    }
  65
  66    return base_format;
  67 }
  68
  69 static void
  70 st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
  71                                          struct gl_renderbuffer *rb,
  72                                          GLeglImageOES image_handle)
  73 {
  74    struct st_context *st = st_context(ctx);
  75    struct st_renderbuffer *strb = st_renderbuffer(rb);
  76    struct pipe_surface *ps;
  77
  78    ps = st_manager_get_egl_image_surface(st, (void *) image_handle);
  79    if (ps) {
  80       strb->Base.Width = ps->width;
  81       strb->Base.Height = ps->height;
  82       strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
  83       strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
  84       strb->Base.InternalFormat = strb->Base._BaseFormat;
  85
  86       pipe_surface_reference(&strb->surface, ps);
  87       pipe_resource_reference(&strb->texture, ps->texture);
  88
  89       pipe_surface_reference(&ps, NULL);
  90    }
  91 }
  92
  93 static void
  94 st_bind_surface(struct gl_context *ctx, GLenum target,
  95                 struct gl_texture_object *texObj,
  96                 struct gl_texture_image *texImage,
  97                 struct pipe_surface *ps)
  98 {
  99    struct st_texture_object *stObj;
 100    struct st_texture_image *stImage;
 101    GLenum internalFormat;
 102    gl_format texFormat;
 103
 104    /* map pipe format to base format */
 105    if (util_format_get_component_bits(ps->format, UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
 106       internalFormat = GL_RGBA;
 107    else
 108       internalFormat = GL_RGB;
 109
 110    stObj = st_texture_object(texObj);
 111    stImage = st_texture_image(texImage);
 112
 113    /* switch to surface based */
 114    if (!stObj->surface_based) {
 115       _mesa_clear_texture_object(ctx, texObj);
 116       stObj->surface_based = GL_TRUE;
 117    }
 118
 119    texFormat = st_pipe_format_to_mesa_format(ps->format);
 120
 121    _mesa_init_teximage_fields(ctx, texImage,
 122                               ps->width, ps->height, 1, 0, internalFormat,
 123                               texFormat);
 124
 125    /* FIXME create a non-default sampler view from the pipe_surface? */
 126    pipe_resource_reference(&stObj->pt, ps->texture);
 127    pipe_sampler_view_reference(&stObj->sampler_view, NULL);
 128    pipe_resource_reference(&stImage->pt, stObj->pt);
 129
 130    stObj->width0 = ps->width;
 131    stObj->height0 = ps->height;
 132    stObj->depth0 = 1;
 133    stObj->surface_format = ps->format;
 134
 135    _mesa_dirty_texobj(ctx, texObj);
 136 }
 137
 138 static void
 139 st_egl_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 140                                struct gl_texture_object *texObj,
 141                                struct gl_texture_image *texImage,
 142                                GLeglImageOES image_handle)
 143 {
 144    struct st_context *st = st_context(ctx);
 145    struct pipe_surface *ps;
 146
 147    ps = st_manager_get_egl_image_surface(st, (void *) image_handle);
 148    if (ps) {
 149       st_bind_surface(ctx, target, texObj, texImage, ps);
 150       pipe_surface_reference(&ps, NULL);
 151    }
 152 }
 153
 154 void
 155 st_init_eglimage_functions(struct dd_function_table *functions)
 156 {
 157    functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
 158    functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
 159 }