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       _mesa_error(ctx, GL_INVALID_OPERATION, "%s(format not supported)", error);
 100       return NULL;
 101    }
 102
 103    u_surface_default_template(&surf_tmpl, stimg.texture);
 104    surf_tmpl.format = stimg.format;
 105    surf_tmpl.u.tex.level = stimg.level;
 106    surf_tmpl.u.tex.first_layer = stimg.layer;
 107    surf_tmpl.u.tex.last_layer = stimg.layer;
 108    ps = st->pipe->create_surface(st->pipe, stimg.texture, &surf_tmpl);
 109    pipe_resource_reference(&stimg.texture, NULL);
 110
 111    return ps;
 112 }
 113
 114 /**
 115  * Return the base format just like _mesa_base_fbo_format does.
 116  */
 117 static GLenum
 118 st_pipe_format_to_base_format(enum pipe_format format)
 119 {
 120    GLenum base_format;
 121
 122    if (util_format_is_depth_or_stencil(format)) {
 123       if (util_format_is_depth_and_stencil(format)) {
 124          base_format = GL_DEPTH_STENCIL;
 125       }
 126       else {
 127          if (format == PIPE_FORMAT_S8_UINT)
 128             base_format = GL_STENCIL_INDEX;
 129          else
 130             base_format = GL_DEPTH_COMPONENT;
 131       }
 132    }
 133    else {
 134       /* is this enough? */
 135       if (util_format_has_alpha(format))
 136          base_format = GL_RGBA;
 137       else
 138          base_format = GL_RGB;
 139    }
 140
 141    return base_format;
 142 }
 143
 144 static void
 145 st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
 146                                          struct gl_renderbuffer *rb,
 147                                          GLeglImageOES image_handle)
 148 {
 149    struct st_renderbuffer *strb = st_renderbuffer(rb);
 150    struct pipe_surface *ps;
 151
 152    ps = st_egl_image_get_surface(ctx, image_handle, PIPE_BIND_RENDER_TARGET,
 153                                  "glEGLImageTargetRenderbufferStorage");
 154    if (ps) {
 155       strb->Base.Width = ps->width;
 156       strb->Base.Height = ps->height;
 157       strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
 158       strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
 159       strb->Base.InternalFormat = strb->Base._BaseFormat;
 160
 161       struct pipe_surface **psurf =
 162          util_format_is_srgb(ps->format) ? &strb->surface_srgb :
 163                                            &strb->surface_linear;
 164
 165       pipe_surface_reference(psurf, ps);
 166       strb->surface = *psurf;
 167       pipe_resource_reference(&strb->texture, ps->texture);
 168
 169       pipe_surface_reference(&ps, NULL);
 170    }
 171 }
 172
 173 static void
 174 st_bind_surface(struct gl_context *ctx, GLenum target,
 175                 struct gl_texture_object *texObj,
 176                 struct gl_texture_image *texImage,
 177                 struct pipe_surface *ps)
 178 {
 179    struct st_context *st = st_context(ctx);
 180    struct st_texture_object *stObj;
 181    struct st_texture_image *stImage;
 182    GLenum internalFormat;
 183    mesa_format texFormat;
 184
 185    /* map pipe format to base format */
 186    if (util_format_get_component_bits(ps->format, UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
 187       internalFormat = GL_RGBA;
 188    else
 189       internalFormat = GL_RGB;
 190
 191    stObj = st_texture_object(texObj);
 192    stImage = st_texture_image(texImage);
 193
 194    /* switch to surface based */
 195    if (!stObj->surface_based) {
 196       _mesa_clear_texture_object(ctx, texObj);
 197       stObj->surface_based = GL_TRUE;
 198    }
 199
 200    texFormat = st_pipe_format_to_mesa_format(ps->format);
 201
 202    /* TODO RequiredTextureImageUnits should probably be reset back
 203     * to 1 somewhere if different texture is bound??
 204     */
 205    if (texFormat == MESA_FORMAT_NONE) {
 206       switch (ps->format) {
 207       case PIPE_FORMAT_NV12:
 208          texFormat = MESA_FORMAT_R_UNORM8;
 209          texObj->RequiredTextureImageUnits = 2;
 210          break;
 211       case PIPE_FORMAT_IYUV:
 212          texFormat = MESA_FORMAT_R_UNORM8;
 213          texObj->RequiredTextureImageUnits = 3;
 214          break;
 215       default:
 216          unreachable("bad YUV format!");
 217       }
 218    }
 219
 220    _mesa_init_teximage_fields(ctx, texImage,
 221                               ps->width, ps->height, 1, 0, internalFormat,
 222                               texFormat);
 223
 224    /* FIXME create a non-default sampler view from the pipe_surface? */
 225    pipe_resource_reference(&stObj->pt, ps->texture);
 226    st_texture_release_all_sampler_views(st, stObj);
 227    pipe_resource_reference(&stImage->pt, stObj->pt);
 228
 229    stObj->surface_format = ps->format;
 230
 231    _mesa_dirty_texobj(ctx, texObj);
 232 }
 233
 234 static void
 235 st_egl_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 236                                struct gl_texture_object *texObj,
 237                                struct gl_texture_image *texImage,
 238                                GLeglImageOES image_handle)
 239 {
 240    struct pipe_surface *ps;
 241
 242    ps = st_egl_image_get_surface(ctx, image_handle, PIPE_BIND_SAMPLER_VIEW,
 243                                  "glEGLImageTargetTexture2D");
 244    if (ps) {
 245       st_bind_surface(ctx, target, texObj, texImage, ps);
 246       pipe_surface_reference(&ps, NULL);
 247    }
 248 }
 249
 250 void
 251 st_init_eglimage_functions(struct dd_function_table *functions)
 252 {
 253    functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
 254    functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
 255 }