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/errors.h"
  29 #include "main/texobj.h"
  30 #include "main/teximage.h"
  31 #include "util/u_inlines.h"
  32 #include "util/u_format.h"
  33 #include "st_cb_eglimage.h"
  34 #include "st_cb_fbo.h"
  35 #include "st_context.h"
  36 #include "st_texture.h"
  37 #include "st_format.h"
  38 #include "st_manager.h"
  39 #include "st_sampler_view.h"
  40 #include "util/u_surface.h"
  41
  42 static bool
  43 is_format_supported(struct pipe_screen *screen, enum pipe_format format,
  44                     unsigned nr_samples, unsigned nr_storage_samples,
  45                     unsigned usage)
  46 {
  47    bool supported = screen->is_format_supported(screen, format, PIPE_TEXTURE_2D,
  48                                                 nr_samples, nr_storage_samples,
  49                                                 usage);
  50
  51    /* for sampling, some formats can be emulated.. it doesn't matter that
  52     * the surface will have a format that the driver can't cope with because
  53     * we'll give it sampler view formats that it can deal with and generate
  54     * a shader variant that converts.
  55     */
  56    if ((usage == PIPE_BIND_SAMPLER_VIEW) && !supported) {
  57       if (format == PIPE_FORMAT_IYUV) {
  58          supported = screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM,
  59                                                  PIPE_TEXTURE_2D, nr_samples,
  60                                                  nr_storage_samples, usage);
  61       } else if (format == PIPE_FORMAT_NV12) {
  62          supported = screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM,
  63                                                  PIPE_TEXTURE_2D, nr_samples,
  64                                                  nr_storage_samples, usage) &&
  65                      screen->is_format_supported(screen, PIPE_FORMAT_R8G8_UNORM,
  66                                                  PIPE_TEXTURE_2D, nr_samples,
  67                                                  nr_storage_samples, usage);
  68       }
  69    }
  70
  71    return supported;
  72 }
  73
  74 /**
  75  * Return the gallium texture of an EGLImage.
  76  */
  77 static bool
  78 st_get_egl_image(struct gl_context *ctx, GLeglImageOES image_handle,
  79                  unsigned usage, const char *error, struct st_egl_image *out)
  80 {
  81    struct st_context *st = st_context(ctx);
  82    struct pipe_screen *screen = st->pipe->screen;
  83    struct st_manager *smapi =
  84       (struct st_manager *) st->iface.st_context_private;
  85
  86    if (!smapi || !smapi->get_egl_image)
  87       return false;
  88
  89    memset(out, 0, sizeof(*out));
  90    if (!smapi->get_egl_image(smapi, (void *) image_handle, out)) {
  91       /* image_handle does not refer to a valid EGL image object */
  92       _mesa_error(ctx, GL_INVALID_VALUE, "%s(image handle not found)", error);
  93       return false;
  94    }
  95
  96    if (!is_format_supported(screen, out->format, out->texture->nr_samples,
  97                             out->texture->nr_storage_samples, usage)) {
  98       /* unable to specify a texture object using the specified EGL image */
  99       pipe_resource_reference(&out->texture, NULL);
 100       _mesa_error(ctx, GL_INVALID_OPERATION, "%s(format not supported)", error);
 101       return false;
 102    }
 103
 104    return true;
 105 }
 106
 107 /**
 108  * Return the base format just like _mesa_base_fbo_format does.
 109  */
 110 static GLenum
 111 st_pipe_format_to_base_format(enum pipe_format format)
 112 {
 113    GLenum base_format;
 114
 115    if (util_format_is_depth_or_stencil(format)) {
 116       if (util_format_is_depth_and_stencil(format)) {
 117          base_format = GL_DEPTH_STENCIL;
 118       }
 119       else {
 120          if (format == PIPE_FORMAT_S8_UINT)
 121             base_format = GL_STENCIL_INDEX;
 122          else
 123             base_format = GL_DEPTH_COMPONENT;
 124       }
 125    }
 126    else {
 127       /* is this enough? */
 128       if (util_format_has_alpha(format))
 129          base_format = GL_RGBA;
 130       else
 131          base_format = GL_RGB;
 132    }
 133
 134    return base_format;
 135 }
 136
 137 static void
 138 st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
 139                                          struct gl_renderbuffer *rb,
 140                                          GLeglImageOES image_handle)
 141 {
 142    struct st_renderbuffer *strb = st_renderbuffer(rb);
 143    struct st_egl_image stimg;
 144
 145    if (st_get_egl_image(ctx, image_handle, PIPE_BIND_RENDER_TARGET,
 146                         "glEGLImageTargetRenderbufferStorage",
 147                         &stimg)) {
 148       struct pipe_context *pipe = st_context(ctx)->pipe;
 149       struct pipe_surface *ps, surf_tmpl;
 150
 151       u_surface_default_template(&surf_tmpl, stimg.texture);
 152       surf_tmpl.format = stimg.format;
 153       surf_tmpl.u.tex.level = stimg.level;
 154       surf_tmpl.u.tex.first_layer = stimg.layer;
 155       surf_tmpl.u.tex.last_layer = stimg.layer;
 156       ps = pipe->create_surface(pipe, stimg.texture, &surf_tmpl);
 157       pipe_resource_reference(&stimg.texture, NULL);
 158
 159       if (!ps)
 160          return;
 161
 162       strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
 163       strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
 164       strb->Base.InternalFormat = strb->Base._BaseFormat;
 165
 166       st_set_ws_renderbuffer_surface(strb, ps);
 167       pipe_surface_reference(&ps, NULL);
 168    }
 169 }
 170
 171 static void
 172 st_bind_egl_image(struct gl_context *ctx,
 173                   struct gl_texture_object *texObj,
 174                   struct gl_texture_image *texImage,
 175                   struct st_egl_image *stimg)
 176 {
 177    struct st_context *st = st_context(ctx);
 178    struct st_texture_object *stObj;
 179    struct st_texture_image *stImage;
 180    GLenum internalFormat;
 181    mesa_format texFormat;
 182
 183    /* map pipe format to base format */
 184    if (util_format_get_component_bits(stimg->format,
 185                                       UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
 186       internalFormat = GL_RGBA;
 187    else
 188       internalFormat = GL_RGB;
 189
 190    stObj = st_texture_object(texObj);
 191    stImage = st_texture_image(texImage);
 192
 193    /* switch to surface based */
 194    if (!stObj->surface_based) {
 195       _mesa_clear_texture_object(ctx, texObj, NULL);
 196       stObj->surface_based = GL_TRUE;
 197    }
 198
 199    texFormat = st_pipe_format_to_mesa_format(stimg->format);
 200
 201    /* TODO RequiredTextureImageUnits should probably be reset back
 202     * to 1 somewhere if different texture is bound??
 203     */
 204    if (texFormat == MESA_FORMAT_NONE) {
 205       switch (stimg->format) {
 206       case PIPE_FORMAT_NV12:
 207          texFormat = MESA_FORMAT_R_UNORM8;
 208          texObj->RequiredTextureImageUnits = 2;
 209          break;
 210       case PIPE_FORMAT_IYUV:
 211          texFormat = MESA_FORMAT_R_UNORM8;
 212          texObj->RequiredTextureImageUnits = 3;
 213          break;
 214       default:
 215          unreachable("bad YUV format!");
 216       }
 217    }
 218
 219    _mesa_init_teximage_fields(ctx, texImage,
 220                               stimg->texture->width0, stimg->texture->height0,
 221                               1, 0, internalFormat, texFormat);
 222
 223    pipe_resource_reference(&stObj->pt, stimg->texture);
 224    st_texture_release_all_sampler_views(st, stObj);
 225    pipe_resource_reference(&stImage->pt, stObj->pt);
 226    if (st->pipe->screen->resource_changed)
 227       st->pipe->screen->resource_changed(st->pipe->screen, stImage->pt);
 228
 229    stObj->surface_format = stimg->format;
 230    stObj->level_override = stimg->level;
 231    stObj->layer_override = stimg->layer;
 232
 233    _mesa_dirty_texobj(ctx, texObj);
 234 }
 235
 236 static void
 237 st_egl_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 238                                struct gl_texture_object *texObj,
 239                                struct gl_texture_image *texImage,
 240                                GLeglImageOES image_handle)
 241 {
 242    struct st_egl_image stimg;
 243
 244    if (!st_get_egl_image(ctx, image_handle, PIPE_BIND_SAMPLER_VIEW,
 245                          "glEGLImageTargetTexture2D", &stimg))
 246       return;
 247
 248    st_bind_egl_image(ctx, texObj, texImage, &stimg);
 249    pipe_resource_reference(&stimg.texture, NULL);
 250 }
 251
 252 void
 253 st_init_eglimage_functions(struct dd_function_table *functions)
 254 {
 255    functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
 256    functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
 257 }