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 gallium texture of an EGLImage.
  74  */
  75 static bool
  76 st_get_egl_image(struct gl_context *ctx, GLeglImageOES image_handle,
  77                  unsigned usage, const char *error, struct st_egl_image *out)
  78 {
  79    struct st_context *st = st_context(ctx);
  80    struct pipe_screen *screen = st->pipe->screen;
  81    struct st_manager *smapi =
  82       (struct st_manager *) st->iface.st_context_private;
  83
  84    if (!smapi || !smapi->get_egl_image)
  85       return false;
  86
  87    memset(out, 0, sizeof(*out));
  88    if (!smapi->get_egl_image(smapi, (void *) image_handle, out)) {
  89       /* image_handle does not refer to a valid EGL image object */
  90       _mesa_error(ctx, GL_INVALID_VALUE, "%s(image handle not found)", error);
  91       return false;
  92    }
  93
  94    if (!is_format_supported(screen, out->format, out->texture->nr_samples, usage)) {
  95       /* unable to specify a texture object using the specified EGL image */
  96       pipe_resource_reference(&out->texture, NULL);
  97       _mesa_error(ctx, GL_INVALID_OPERATION, "%s(format not supported)", error);
  98       return false;
  99    }
 100
 101    return true;
 102 }
 103
 104 /**
 105  * Return the base format just like _mesa_base_fbo_format does.
 106  */
 107 static GLenum
 108 st_pipe_format_to_base_format(enum pipe_format format)
 109 {
 110    GLenum base_format;
 111
 112    if (util_format_is_depth_or_stencil(format)) {
 113       if (util_format_is_depth_and_stencil(format)) {
 114          base_format = GL_DEPTH_STENCIL;
 115       }
 116       else {
 117          if (format == PIPE_FORMAT_S8_UINT)
 118             base_format = GL_STENCIL_INDEX;
 119          else
 120             base_format = GL_DEPTH_COMPONENT;
 121       }
 122    }
 123    else {
 124       /* is this enough? */
 125       if (util_format_has_alpha(format))
 126          base_format = GL_RGBA;
 127       else
 128          base_format = GL_RGB;
 129    }
 130
 131    return base_format;
 132 }
 133
 134 static void
 135 st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
 136                                          struct gl_renderbuffer *rb,
 137                                          GLeglImageOES image_handle)
 138 {
 139    struct st_renderbuffer *strb = st_renderbuffer(rb);
 140    struct st_egl_image stimg;
 141
 142    if (st_get_egl_image(ctx, image_handle, PIPE_BIND_RENDER_TARGET,
 143                         "glEGLImageTargetRenderbufferStorage",
 144                         &stimg)) {
 145       struct pipe_context *pipe = st_context(ctx)->pipe;
 146       struct pipe_surface *ps, surf_tmpl;
 147
 148       u_surface_default_template(&surf_tmpl, stimg.texture);
 149       surf_tmpl.format = stimg.format;
 150       surf_tmpl.u.tex.level = stimg.level;
 151       surf_tmpl.u.tex.first_layer = stimg.layer;
 152       surf_tmpl.u.tex.last_layer = stimg.layer;
 153       ps = pipe->create_surface(pipe, stimg.texture, &surf_tmpl);
 154       pipe_resource_reference(&stimg.texture, NULL);
 155
 156       if (!ps)
 157          return;
 158
 159       strb->Base.Width = ps->width;
 160       strb->Base.Height = ps->height;
 161       strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
 162       strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
 163       strb->Base.InternalFormat = strb->Base._BaseFormat;
 164
 165       struct pipe_surface **psurf =
 166          util_format_is_srgb(ps->format) ? &strb->surface_srgb :
 167                                            &strb->surface_linear;
 168
 169       pipe_surface_reference(psurf, ps);
 170       strb->surface = *psurf;
 171       pipe_resource_reference(&strb->texture, ps->texture);
 172
 173       pipe_surface_reference(&ps, NULL);
 174    }
 175 }
 176
 177 static void
 178 st_bind_egl_image(struct gl_context *ctx,
 179                   struct gl_texture_object *texObj,
 180                   struct gl_texture_image *texImage,
 181                   struct st_egl_image *stimg)
 182 {
 183    struct st_context *st = st_context(ctx);
 184    struct st_texture_object *stObj;
 185    struct st_texture_image *stImage;
 186    GLenum internalFormat;
 187    mesa_format texFormat;
 188
 189    /* map pipe format to base format */
 190    if (util_format_get_component_bits(stimg->format,
 191                                       UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
 192       internalFormat = GL_RGBA;
 193    else
 194       internalFormat = GL_RGB;
 195
 196    stObj = st_texture_object(texObj);
 197    stImage = st_texture_image(texImage);
 198
 199    /* switch to surface based */
 200    if (!stObj->surface_based) {
 201       _mesa_clear_texture_object(ctx, texObj, NULL);
 202       stObj->surface_based = GL_TRUE;
 203    }
 204
 205    texFormat = st_pipe_format_to_mesa_format(stimg->format);
 206
 207    /* TODO RequiredTextureImageUnits should probably be reset back
 208     * to 1 somewhere if different texture is bound??
 209     */
 210    if (texFormat == MESA_FORMAT_NONE) {
 211       switch (stimg->format) {
 212       case PIPE_FORMAT_NV12:
 213          texFormat = MESA_FORMAT_R_UNORM8;
 214          texObj->RequiredTextureImageUnits = 2;
 215          break;
 216       case PIPE_FORMAT_IYUV:
 217          texFormat = MESA_FORMAT_R_UNORM8;
 218          texObj->RequiredTextureImageUnits = 3;
 219          break;
 220       default:
 221          unreachable("bad YUV format!");
 222       }
 223    }
 224
 225    _mesa_init_teximage_fields(ctx, texImage,
 226                               stimg->texture->width0, stimg->texture->height0,
 227                               1, 0, internalFormat, texFormat);
 228
 229    pipe_resource_reference(&stObj->pt, stimg->texture);
 230    st_texture_release_all_sampler_views(st, stObj);
 231    pipe_resource_reference(&stImage->pt, stObj->pt);
 232
 233    stObj->surface_format = stimg->format;
 234    stObj->level_override = stimg->level;
 235    stObj->layer_override = stimg->layer;
 236
 237    _mesa_dirty_texobj(ctx, texObj);
 238 }
 239
 240 static void
 241 st_egl_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 242                                struct gl_texture_object *texObj,
 243                                struct gl_texture_image *texImage,
 244                                GLeglImageOES image_handle)
 245 {
 246    struct st_egl_image stimg;
 247
 248    if (!st_get_egl_image(ctx, image_handle, PIPE_BIND_SAMPLER_VIEW,
 249                          "glEGLImageTargetTexture2D", &stimg))
 250       return;
 251
 252    st_bind_egl_image(ctx, texObj, texImage, &stimg);
 253    pipe_resource_reference(&stimg.texture, NULL);
 254 }
 255
 256 void
 257 st_init_eglimage_functions(struct dd_function_table *functions)
 258 {
 259    functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
 260    functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
 261 }