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      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 (at) 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 }
    262