src/mesa/state_tracker/st_cb_eglimage.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   4  *
   5  * Copyright (C) 2010 LunarG Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Chia-I Wu <olv@lunarg.com>
  26  */
  27
  28 #include "main/texobj.h"
  29 #include "main/texfetch.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_texture.h"
  36 #include "st_format.h"
  37 #include "st_manager.h"
  38
  39 #if FEATURE_OES_EGL_image
  40
  41 /**
  42  * Return the base format just like _mesa_base_fbo_format does.
  43  */
  44 static GLenum
  45 st_pipe_format_to_base_format(enum pipe_format format)
  46 {
  47    GLenum base_format;
  48
  49    if (util_format_is_depth_or_stencil(format)) {
  50       if (util_format_is_depth_and_stencil(format)) {
  51          base_format = GL_DEPTH_STENCIL;
  52       }
  53       else {
  54          if (format == PIPE_FORMAT_S8_USCALED)
  55             base_format = GL_STENCIL_INDEX;
  56          else
  57             base_format = GL_DEPTH_COMPONENT;
  58       }
  59    }
  60    else {
  61       /* is this enough? */
  62       if (util_format_has_alpha(format))
  63          base_format = GL_RGBA;
  64       else
  65          base_format = GL_RGB;
  66    }
  67
  68    return base_format;
  69 }
  70
  71 static void
  72 st_egl_image_target_renderbuffer_storage(GLcontext *ctx,
  73                                          struct gl_renderbuffer *rb,
  74                                          GLeglImageOES image_handle)
  75 {
  76    struct st_context *st = ctx->st;
  77    struct st_renderbuffer *strb = st_renderbuffer(rb);
  78    struct pipe_surface *ps;
  79    unsigned usage;
  80
  81    usage = PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE;
  82    ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
  83    if (ps) {
  84       strb->Base.Width = ps->width;
  85       strb->Base.Height = ps->height;
  86       strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
  87       strb->Base.DataType = st_format_datatype(ps->format);
  88       strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
  89       strb->Base.InternalFormat = strb->Base._BaseFormat;
  90
  91       pipe_surface_reference(&strb->surface, ps);
  92       pipe_texture_reference(&strb->texture, ps->texture);
  93
  94       pipe_surface_reference(&ps, NULL);
  95    }
  96 }
  97
  98 static void
  99 st_bind_surface(GLcontext *ctx, GLenum target,
 100                 struct gl_texture_object *texObj,
 101                 struct gl_texture_image *texImage,
 102                 struct pipe_surface *ps)
 103 {
 104    struct st_texture_object *stObj;
 105    struct st_texture_image *stImage;
 106    GLenum internalFormat;
 107
 108    /* map pipe format to base format */
 109    if (util_format_get_component_bits(ps->format, UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
 110       internalFormat = GL_RGBA;
 111    else
 112       internalFormat = GL_RGB;
 113
 114    stObj = st_texture_object(texObj);
 115    stImage = st_texture_image(texImage);
 116
 117    /* switch to surface based */
 118    if (!stObj->surface_based) {
 119       _mesa_clear_texture_object(ctx, texObj);
 120       stObj->surface_based = GL_TRUE;
 121    }
 122
 123    _mesa_init_teximage_fields(ctx, target, texImage,
 124                               ps->width, ps->height, 1, 0, internalFormat);
 125    texImage->TexFormat = st_pipe_format_to_mesa_format(ps->format);
 126    _mesa_set_fetch_functions(texImage, 2);
 127
 128    stObj->pipe = ctx->st->pipe;
 129    /* FIXME create a non-default sampler view from the pipe_surface? */
 130    pipe_texture_reference(&stImage->pt, ps->texture);
 131
 132    _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
 133 }
 134
 135 static void
 136 st_egl_image_target_texture_2d(GLcontext *ctx, GLenum target,
 137                                struct gl_texture_object *texObj,
 138                                struct gl_texture_image *texImage,
 139                                GLeglImageOES image_handle)
 140 {
 141    struct st_context *st = ctx->st;
 142    struct pipe_surface *ps;
 143    unsigned usage;
 144
 145    usage = PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE;
 146    ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
 147    if (ps) {
 148       st_bind_surface(ctx, target, texObj, texImage, ps);
 149       pipe_surface_reference(&ps, NULL);
 150    }
 151 }
 152
 153 void
 154 st_init_eglimage_functions(struct dd_function_table *functions)
 155 {
 156    functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
 157    functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
 158 }
 159
 160 #endif /* FEATURE_OES_EGL_image */