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/mfeatures.h"
30#include "main/texobj.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_context.h"
37#include "st_texture.h"
38#include "st_format.h"
39#include "st_manager.h"
40
41#if FEATURE_OES_EGL_image
42
43/**
44 * Return the base format just like _mesa_base_fbo_format does.
45 */
46static GLenum
47st_pipe_format_to_base_format(enum pipe_format format)
48{
49   GLenum base_format;
50
51   if (util_format_is_depth_or_stencil(format)) {
52      if (util_format_is_depth_and_stencil(format)) {
53         base_format = GL_DEPTH_STENCIL;
54      }
55      else {
56         if (format == PIPE_FORMAT_S8_UINT)
57            base_format = GL_STENCIL_INDEX;
58         else
59            base_format = GL_DEPTH_COMPONENT;
60      }
61   }
62   else {
63      /* is this enough? */
64      if (util_format_has_alpha(format))
65         base_format = GL_RGBA;
66      else
67         base_format = GL_RGB;
68   }
69
70   return base_format;
71}
72
73static void
74st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
75					 struct gl_renderbuffer *rb,
76					 GLeglImageOES image_handle)
77{
78   struct st_context *st = st_context(ctx);
79   struct st_renderbuffer *strb = st_renderbuffer(rb);
80   struct pipe_surface *ps;
81   unsigned usage;
82
83   usage = PIPE_BIND_RENDER_TARGET;
84   ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
85   if (ps) {
86      strb->Base.Width = ps->width;
87      strb->Base.Height = ps->height;
88      strb->Base.Format = st_pipe_format_to_mesa_format(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_resource_reference(&strb->texture, ps->texture);
94
95      pipe_surface_reference(&ps, NULL);
96   }
97}
98
99static void
100st_bind_surface(struct gl_context *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   gl_format texFormat;
109
110   /* map pipe format to base format */
111   if (util_format_get_component_bits(ps->format, UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
112      internalFormat = GL_RGBA;
113   else
114      internalFormat = GL_RGB;
115
116   stObj = st_texture_object(texObj);
117   stImage = st_texture_image(texImage);
118
119   /* switch to surface based */
120   if (!stObj->surface_based) {
121      _mesa_clear_texture_object(ctx, texObj);
122      stObj->surface_based = GL_TRUE;
123   }
124
125   texFormat = st_pipe_format_to_mesa_format(ps->format);
126
127   _mesa_init_teximage_fields(ctx, texImage,
128                              ps->width, ps->height, 1, 0, internalFormat,
129                              texFormat);
130
131   /* FIXME create a non-default sampler view from the pipe_surface? */
132   pipe_resource_reference(&stObj->pt, ps->texture);
133   pipe_sampler_view_reference(&stObj->sampler_view, NULL);
134   pipe_resource_reference(&stImage->pt, stObj->pt);
135
136   stObj->width0 = ps->width;
137   stObj->height0 = ps->height;
138   stObj->depth0 = 1;
139
140   _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
141}
142
143static void
144st_egl_image_target_texture_2d(struct gl_context *ctx, GLenum target,
145			       struct gl_texture_object *texObj,
146			       struct gl_texture_image *texImage,
147			       GLeglImageOES image_handle)
148{
149   struct st_context *st = st_context(ctx);
150   struct pipe_surface *ps;
151   unsigned usage;
152
153   usage = PIPE_BIND_SAMPLER_VIEW;
154   ps = st_manager_get_egl_image_surface(st, (void *) image_handle, usage);
155   if (ps) {
156      st_bind_surface(ctx, target, texObj, texImage, ps);
157      pipe_surface_reference(&ps, NULL);
158   }
159}
160
161void
162st_init_eglimage_functions(struct dd_function_table *functions)
163{
164   functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
165   functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
166}
167
168#endif /* FEATURE_OES_EGL_image */
169