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