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 OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Chia-I Wu <olv@lunarg.com>
  27  */
  28
  29 #include "main/texobj.h"
  30 #include "main/texfetch.h"
  31 #include "main/teximage.h"
  32 #include "util/u_inlines.h"
  33 #include "util/u_format.h"
  34 #include "st_cb_eglimage.h"
  35 #include "st_cb_fbo.h"
  36 #include "st_texture.h"
  37 #include "st_format.h"
  38 #include "st_manager.h"
  39
  40 #if FEATURE_OES_EGL_image
  41
  42 /**
  43  * Return the base format just like _mesa_base_fbo_format does.
  44  */
  45 static GLenum
  46 st_pipe_format_to_base_format(enum pipe_format format)
  47 {
  48    GLenum base_format;
  49
  50    if (util_format_is_depth_or_stencil(format)) {
  51       if (util_format_is_depth_and_stencil(format)) {
  52          base_format = GL_DEPTH_STENCIL;
  53       }
  54       else {
  55          if (format == PIPE_FORMAT_S8_USCALED)
  56             base_format = GL_STENCIL_INDEX;
  57          else
  58             base_format = GL_DEPTH_COMPONENT;
  59       }
  60    }
  61    else {
  62       /* is this enough? */
  63       if (util_format_has_alpha(format))
  64          base_format = GL_RGBA;
  65       else
  66          base_format = GL_RGB;
  67    }
  68
  69    return base_format;
  70 }
  71
  72 static void
  73 st_egl_image_target_renderbuffer_storage(GLcontext *ctx,
  74                                          struct gl_renderbuffer *rb,
  75                                          GLeglImageOES image_handle)
  76 {
  77    struct st_context *st = ctx->st;
  78    struct st_renderbuffer *strb = st_renderbuffer(rb);
  79    struct pipe_surface *ps;
  80    unsigned usage;
  81
  82    usage = PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE;
  83    ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
  84    if (ps) {
  85       strb->Base.Width = ps->width;
  86       strb->Base.Height = ps->height;
  87       strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
  88       strb->Base.DataType = st_format_datatype(ps->format);
  89       strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
  90       strb->Base.InternalFormat = strb->Base._BaseFormat;
  91
  92       pipe_surface_reference(&strb->surface, ps);
  93       pipe_texture_reference(&strb->texture, ps->texture);
  94
  95       pipe_surface_reference(&ps, NULL);
  96    }
  97 }
  98
  99 static void
 100 st_bind_surface(GLcontext *ctx, GLenum target,
 101                 struct gl_texture_object *texObj,
 102                 struct gl_texture_image *texImage,
 103                 struct pipe_surface *ps)
 104 {
 105    struct st_texture_object *stObj;
 106    struct st_texture_image *stImage;
 107    GLenum internalFormat;
 108
 109    /* map pipe format to base format */
 110    if (util_format_get_component_bits(ps->format, UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
 111       internalFormat = GL_RGBA;
 112    else
 113       internalFormat = GL_RGB;
 114
 115    stObj = st_texture_object(texObj);
 116    stImage = st_texture_image(texImage);
 117
 118    /* switch to surface based */
 119    if (!stObj->surface_based) {
 120       _mesa_clear_texture_object(ctx, texObj);
 121       stObj->surface_based = GL_TRUE;
 122    }
 123
 124    _mesa_init_teximage_fields(ctx, target, texImage,
 125                               ps->width, ps->height, 1, 0, internalFormat);
 126    texImage->TexFormat = st_pipe_format_to_mesa_format(ps->format);
 127    _mesa_set_fetch_functions(texImage, 2);
 128
 129    stObj->pipe = ctx->st->pipe;
 130    /* FIXME create a non-default sampler view from the pipe_surface? */
 131    pipe_texture_reference(&stImage->pt, ps->texture);
 132
 133    _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
 134 }
 135
 136 static void
 137 st_egl_image_target_texture_2d(GLcontext *ctx, GLenum target,
 138                                struct gl_texture_object *texObj,
 139                                struct gl_texture_image *texImage,
 140                                GLeglImageOES image_handle)
 141 {
 142    struct st_context *st = ctx->st;
 143    struct pipe_surface *ps;
 144    unsigned usage;
 145
 146    usage = PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE;
 147    ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
 148    if (ps) {
 149       st_bind_surface(ctx, target, texObj, texImage, ps);
 150       pipe_surface_reference(&ps, NULL);
 151    }
 152 }
 153
 154 void
 155 st_init_eglimage_functions(struct dd_function_table *functions)
 156 {
 157    functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
 158    functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
 159 }
 160
 161 #endif /* FEATURE_OES_EGL_image */