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 #include "st_sampler_view.h"
  39 #include "util/u_surface.h"
  40
  41
  42 /**
  43  * Return the surface of an EGLImage.
  44  * FIXME: I think this should operate on resources, not surfaces
  45  */
  46 static struct pipe_surface *
  47 st_egl_image_get_surface(struct gl_context *ctx, GLeglImageOES image_handle)
  48 {
  49    struct st_context *st = st_context(ctx);
  50    struct st_manager *smapi =
  51       (struct st_manager *) st->iface.st_context_private;
  52    struct st_egl_image stimg;
  53    struct pipe_surface *ps, surf_tmpl;
  54
  55    if (!smapi || !smapi->get_egl_image)
  56       return NULL;
  57
  58    memset(&stimg, 0, sizeof(stimg));
  59    if (!smapi->get_egl_image(smapi, (void *) image_handle, &stimg))
  60       return NULL;
  61
  62    u_surface_default_template(&surf_tmpl, stimg.texture);
  63    surf_tmpl.format = stimg.format;
  64    surf_tmpl.u.tex.level = stimg.level;
  65    surf_tmpl.u.tex.first_layer = stimg.layer;
  66    surf_tmpl.u.tex.last_layer = stimg.layer;
  67    ps = st->pipe->create_surface(st->pipe, stimg.texture, &surf_tmpl);
  68    pipe_resource_reference(&stimg.texture, NULL);
  69
  70    return ps;
  71 }
  72
  73 /**
  74  * Return the base format just like _mesa_base_fbo_format does.
  75  */
  76 static GLenum
  77 st_pipe_format_to_base_format(enum pipe_format format)
  78 {
  79    GLenum base_format;
  80
  81    if (util_format_is_depth_or_stencil(format)) {
  82       if (util_format_is_depth_and_stencil(format)) {
  83          base_format = GL_DEPTH_STENCIL;
  84       }
  85       else {
  86          if (format == PIPE_FORMAT_S8_UINT)
  87             base_format = GL_STENCIL_INDEX;
  88          else
  89             base_format = GL_DEPTH_COMPONENT;
  90       }
  91    }
  92    else {
  93       /* is this enough? */
  94       if (util_format_has_alpha(format))
  95          base_format = GL_RGBA;
  96       else
  97          base_format = GL_RGB;
  98    }
  99
 100    return base_format;
 101 }
 102
 103 static void
 104 st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
 105                                          struct gl_renderbuffer *rb,
 106                                          GLeglImageOES image_handle)
 107 {
 108    struct st_renderbuffer *strb = st_renderbuffer(rb);
 109    struct pipe_surface *ps;
 110
 111    ps = st_egl_image_get_surface(ctx, image_handle);
 112    if (ps) {
 113       strb->Base.Width = ps->width;
 114       strb->Base.Height = ps->height;
 115       strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
 116       strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
 117       strb->Base.InternalFormat = strb->Base._BaseFormat;
 118
 119       pipe_surface_reference(&strb->surface, ps);
 120       pipe_resource_reference(&strb->texture, ps->texture);
 121
 122       pipe_surface_reference(&ps, NULL);
 123    }
 124 }
 125
 126 static void
 127 st_bind_surface(struct gl_context *ctx, GLenum target,
 128                 struct gl_texture_object *texObj,
 129                 struct gl_texture_image *texImage,
 130                 struct pipe_surface *ps)
 131 {
 132    struct st_context *st = st_context(ctx);
 133    struct st_texture_object *stObj;
 134    struct st_texture_image *stImage;
 135    GLenum internalFormat;
 136    mesa_format texFormat;
 137
 138    /* map pipe format to base format */
 139    if (util_format_get_component_bits(ps->format, UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
 140       internalFormat = GL_RGBA;
 141    else
 142       internalFormat = GL_RGB;
 143
 144    stObj = st_texture_object(texObj);
 145    stImage = st_texture_image(texImage);
 146
 147    /* switch to surface based */
 148    if (!stObj->surface_based) {
 149       _mesa_clear_texture_object(ctx, texObj);
 150       stObj->surface_based = GL_TRUE;
 151    }
 152
 153    texFormat = st_pipe_format_to_mesa_format(ps->format);
 154
 155    /* TODO RequiredTextureImageUnits should probably be reset back
 156     * to 1 somewhere if different texture is bound??
 157     */
 158    if (texFormat == MESA_FORMAT_NONE) {
 159       switch (ps->format) {
 160       case PIPE_FORMAT_NV12:
 161          texFormat = MESA_FORMAT_R_UNORM8;
 162          texObj->RequiredTextureImageUnits = 2;
 163          break;
 164       case PIPE_FORMAT_IYUV:
 165          texFormat = MESA_FORMAT_R_UNORM8;
 166          texObj->RequiredTextureImageUnits = 3;
 167          break;
 168       default:
 169          unreachable("bad YUV format!");
 170       }
 171    }
 172
 173    _mesa_init_teximage_fields(ctx, texImage,
 174                               ps->width, ps->height, 1, 0, internalFormat,
 175                               texFormat);
 176
 177    /* FIXME create a non-default sampler view from the pipe_surface? */
 178    pipe_resource_reference(&stObj->pt, ps->texture);
 179    st_texture_release_all_sampler_views(st, stObj);
 180    pipe_resource_reference(&stImage->pt, stObj->pt);
 181
 182    stObj->surface_format = ps->format;
 183
 184    _mesa_dirty_texobj(ctx, texObj);
 185 }
 186
 187 static void
 188 st_egl_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 189                                struct gl_texture_object *texObj,
 190                                struct gl_texture_image *texImage,
 191                                GLeglImageOES image_handle)
 192 {
 193    struct pipe_surface *ps;
 194
 195    ps = st_egl_image_get_surface(ctx, image_handle);
 196    if (ps) {
 197       st_bind_surface(ctx, target, texObj, texImage, ps);
 198       pipe_surface_reference(&ps, NULL);
 199    }
 200 }
 201
 202 void
 203 st_init_eglimage_functions(struct dd_function_table *functions)
 204 {
 205    functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
 206    functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
 207 }