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
  43 /**
  44  * Return the surface of an EGLImage.
  45  * FIXME: I think this should operate on resources, not surfaces
  46  */
  47 static struct pipe_surface *
  48 st_egl_image_get_surface(struct gl_context *ctx, GLeglImageOES image_handle,
  49                          unsigned usage, const char *error)
  50 {
  51    struct st_context *st = st_context(ctx);
  52    struct pipe_screen *screen = st->pipe->screen;
  53    struct st_manager *smapi =
  54       (struct st_manager *) st->iface.st_context_private;
  55    struct st_egl_image stimg;
  56    struct pipe_surface *ps, surf_tmpl;
  57
  58    if (!smapi || !smapi->get_egl_image)
  59       return NULL;
  60
  61    memset(&stimg, 0, sizeof(stimg));
  62    if (!smapi->get_egl_image(smapi, (void *) image_handle, &stimg)) {
  63       /* image_handle does not refer to a valid EGL image object */
  64       _mesa_error(ctx, GL_INVALID_VALUE, "%s(image handle not found)", error);
  65       return NULL;
  66    }
  67
  68    if (!screen->is_format_supported(screen, stimg.format, PIPE_TEXTURE_2D,
  69                                     stimg.texture->nr_samples, usage)) {
  70       /* unable to specify a texture object using the specified EGL image */
  71       _mesa_error(ctx, GL_INVALID_OPERATION, "%s(format not supported)", error);
  72       return NULL;
  73    }
  74
  75    u_surface_default_template(&surf_tmpl, stimg.texture);
  76    surf_tmpl.format = stimg.format;
  77    surf_tmpl.u.tex.level = stimg.level;
  78    surf_tmpl.u.tex.first_layer = stimg.layer;
  79    surf_tmpl.u.tex.last_layer = stimg.layer;
  80    ps = st->pipe->create_surface(st->pipe, stimg.texture, &surf_tmpl);
  81    pipe_resource_reference(&stimg.texture, NULL);
  82
  83    return ps;
  84 }
  85
  86 /**
  87  * Return the base format just like _mesa_base_fbo_format does.
  88  */
  89 static GLenum
  90 st_pipe_format_to_base_format(enum pipe_format format)
  91 {
  92    GLenum base_format;
  93
  94    if (util_format_is_depth_or_stencil(format)) {
  95       if (util_format_is_depth_and_stencil(format)) {
  96          base_format = GL_DEPTH_STENCIL;
  97       }
  98       else {
  99          if (format == PIPE_FORMAT_S8_UINT)
 100             base_format = GL_STENCIL_INDEX;
 101          else
 102             base_format = GL_DEPTH_COMPONENT;
 103       }
 104    }
 105    else {
 106       /* is this enough? */
 107       if (util_format_has_alpha(format))
 108          base_format = GL_RGBA;
 109       else
 110          base_format = GL_RGB;
 111    }
 112
 113    return base_format;
 114 }
 115
 116 static void
 117 st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
 118                                          struct gl_renderbuffer *rb,
 119                                          GLeglImageOES image_handle)
 120 {
 121    struct st_renderbuffer *strb = st_renderbuffer(rb);
 122    struct pipe_surface *ps;
 123
 124    ps = st_egl_image_get_surface(ctx, image_handle, PIPE_BIND_RENDER_TARGET,
 125                                  "glEGLImageTargetRenderbufferStorage");
 126    if (ps) {
 127       strb->Base.Width = ps->width;
 128       strb->Base.Height = ps->height;
 129       strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
 130       strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
 131       strb->Base.InternalFormat = strb->Base._BaseFormat;
 132
 133       pipe_surface_reference(&strb->surface, ps);
 134       pipe_resource_reference(&strb->texture, ps->texture);
 135
 136       pipe_surface_reference(&ps, NULL);
 137    }
 138 }
 139
 140 static void
 141 st_bind_surface(struct gl_context *ctx, GLenum target,
 142                 struct gl_texture_object *texObj,
 143                 struct gl_texture_image *texImage,
 144                 struct pipe_surface *ps)
 145 {
 146    struct st_context *st = st_context(ctx);
 147    struct st_texture_object *stObj;
 148    struct st_texture_image *stImage;
 149    GLenum internalFormat;
 150    mesa_format texFormat;
 151
 152    /* map pipe format to base format */
 153    if (util_format_get_component_bits(ps->format, UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
 154       internalFormat = GL_RGBA;
 155    else
 156       internalFormat = GL_RGB;
 157
 158    stObj = st_texture_object(texObj);
 159    stImage = st_texture_image(texImage);
 160
 161    /* switch to surface based */
 162    if (!stObj->surface_based) {
 163       _mesa_clear_texture_object(ctx, texObj);
 164       stObj->surface_based = GL_TRUE;
 165    }
 166
 167    texFormat = st_pipe_format_to_mesa_format(ps->format);
 168
 169    /* TODO RequiredTextureImageUnits should probably be reset back
 170     * to 1 somewhere if different texture is bound??
 171     */
 172    if (texFormat == MESA_FORMAT_NONE) {
 173       switch (ps->format) {
 174       case PIPE_FORMAT_NV12:
 175          texFormat = MESA_FORMAT_R_UNORM8;
 176          texObj->RequiredTextureImageUnits = 2;
 177          break;
 178       case PIPE_FORMAT_IYUV:
 179          texFormat = MESA_FORMAT_R_UNORM8;
 180          texObj->RequiredTextureImageUnits = 3;
 181          break;
 182       default:
 183          unreachable("bad YUV format!");
 184       }
 185    }
 186
 187    _mesa_init_teximage_fields(ctx, texImage,
 188                               ps->width, ps->height, 1, 0, internalFormat,
 189                               texFormat);
 190
 191    /* FIXME create a non-default sampler view from the pipe_surface? */
 192    pipe_resource_reference(&stObj->pt, ps->texture);
 193    st_texture_release_all_sampler_views(st, stObj);
 194    pipe_resource_reference(&stImage->pt, stObj->pt);
 195
 196    stObj->surface_format = ps->format;
 197
 198    _mesa_dirty_texobj(ctx, texObj);
 199 }
 200
 201 static void
 202 st_egl_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 203                                struct gl_texture_object *texObj,
 204                                struct gl_texture_image *texImage,
 205                                GLeglImageOES image_handle)
 206 {
 207    struct pipe_surface *ps;
 208
 209    ps = st_egl_image_get_surface(ctx, image_handle, PIPE_BIND_SAMPLER_VIEW,
 210                                  "glEGLImageTargetTexture2D");
 211    if (ps) {
 212       st_bind_surface(ctx, target, texObj, texImage, ps);
 213       pipe_surface_reference(&ps, NULL);
 214    }
 215 }
 216
 217 void
 218 st_init_eglimage_functions(struct dd_function_table *functions)
 219 {
 220    functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
 221    functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
 222 }