src/gallium/state_trackers/egl/common/native_helper.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 "util/u_inlines.h"
  30 #include "util/u_memory.h"
  31 #include "pipe/p_screen.h"
  32 #include "pipe/p_context.h"
  33 #include "pipe/p_state.h"
  34
  35 #include "native_helper.h"
  36
  37 struct resource_surface {
  38    struct pipe_screen *screen;
  39    enum pipe_format format;
  40    uint bind;
  41
  42    struct pipe_resource *resources[NUM_NATIVE_ATTACHMENTS];
  43    uint resource_mask;
  44    uint width, height;
  45 };
  46
  47 struct resource_surface *
  48 resource_surface_create(struct pipe_screen *screen,
  49                         enum pipe_format format, uint bind)
  50 {
  51    struct resource_surface *rsurf = CALLOC_STRUCT(resource_surface);
  52
  53    if (rsurf) {
  54       rsurf->screen = screen;
  55       rsurf->format = format;
  56       rsurf->bind = bind;
  57    }
  58
  59    return rsurf;
  60 }
  61
  62 static void
  63 resource_surface_free_resources(struct resource_surface *rsurf)
  64 {
  65    if (rsurf->resource_mask) {
  66       int i;
  67
  68       for (i = 0; i < NUM_NATIVE_ATTACHMENTS; i++) {
  69          if (rsurf->resources[i])
  70             pipe_resource_reference(&rsurf->resources[i], NULL);
  71       }
  72       rsurf->resource_mask = 0x0;
  73    }
  74 }
  75
  76 void
  77 resource_surface_destroy(struct resource_surface *rsurf)
  78 {
  79    resource_surface_free_resources(rsurf);
  80    FREE(rsurf);
  81 }
  82
  83 boolean
  84 resource_surface_set_size(struct resource_surface *rsurf,
  85                           uint width, uint height)
  86 {
  87    boolean changed = FALSE;
  88
  89    if (rsurf->width != width || rsurf->height != height) {
  90       resource_surface_free_resources(rsurf);
  91       rsurf->width = width;
  92       rsurf->height = height;
  93       changed = TRUE;
  94    }
  95
  96    return changed;
  97 }
  98
  99 void
 100 resource_surface_get_size(struct resource_surface *rsurf,
 101                           uint *width, uint *height)
 102 {
 103    if (width)
 104       *width = rsurf->width;
 105    if (height)
 106       *height = rsurf->height;
 107 }
 108
 109 boolean
 110 resource_surface_add_resources(struct resource_surface *rsurf,
 111                                uint resource_mask)
 112 {
 113    struct pipe_resource templ;
 114    int i;
 115
 116    resource_mask &= ~rsurf->resource_mask;
 117    if (!resource_mask)
 118       return TRUE;
 119
 120    if (!rsurf->width || !rsurf->height)
 121       return FALSE;
 122
 123    memset(&templ, 0, sizeof(templ));
 124    templ.target = PIPE_TEXTURE_2D;
 125    templ.format = rsurf->format;
 126    templ.bind = rsurf->bind;
 127    templ.width0 = rsurf->width;
 128    templ.height0 = rsurf->height;
 129    templ.depth0 = 1;
 130    templ.array_size = 1;
 131
 132    for (i = 0; i < NUM_NATIVE_ATTACHMENTS; i++) {
 133       if (resource_mask & (1 <<i)) {
 134          assert(!rsurf->resources[i]);
 135
 136          rsurf->resources[i] =
 137             rsurf->screen->resource_create(rsurf->screen, &templ);
 138          if (rsurf->resources[i])
 139             rsurf->resource_mask |= 1 << i;
 140       }
 141    }
 142
 143    return ((rsurf->resource_mask & resource_mask) == resource_mask);
 144 }
 145
 146
 147 void
 148 resource_surface_get_resources(struct resource_surface *rsurf,
 149                                struct pipe_resource **resources,
 150                                uint resource_mask)
 151 {
 152    int i;
 153
 154    for (i = 0; i < NUM_NATIVE_ATTACHMENTS; i++) {
 155       if (resource_mask & (1 << i)) {
 156          resources[i] = NULL;
 157          pipe_resource_reference(&resources[i], rsurf->resources[i]);
 158       }
 159    }
 160 }
 161
 162 struct pipe_resource *
 163 resource_surface_get_single_resource(struct resource_surface *rsurf,
 164                                      enum native_attachment which)
 165 {
 166    struct pipe_resource *pres = NULL;
 167    pipe_resource_reference(&pres, rsurf->resources[which]);
 168    return pres;
 169 }
 170
 171 static INLINE void
 172 pointer_swap(const void **p1, const void **p2)
 173 {
 174    const void *tmp = *p1;
 175    *p1 = *p2;
 176    *p2 = tmp;
 177 }
 178
 179 void
 180 resource_surface_swap_buffers(struct resource_surface *rsurf,
 181                               enum native_attachment buf1,
 182                               enum native_attachment buf2,
 183                               boolean only_if_exist)
 184 {
 185    const uint buf1_bit = 1 << buf1;
 186    const uint buf2_bit = 1 << buf2;
 187    uint mask;
 188
 189    if (only_if_exist && !(rsurf->resources[buf1] && rsurf->resources[buf2]))
 190       return;
 191
 192    pointer_swap((const void **) &rsurf->resources[buf1],
 193                 (const void **) &rsurf->resources[buf2]);
 194
 195    /* swap mask bits */
 196    mask = rsurf->resource_mask & ~(buf1_bit | buf2_bit);
 197    if (rsurf->resource_mask & buf1_bit)
 198       mask |= buf2_bit;
 199    if (rsurf->resource_mask & buf2_bit)
 200       mask |= buf1_bit;
 201
 202    rsurf->resource_mask = mask;
 203 }
 204
 205 boolean
 206 resource_surface_present(struct resource_surface *rsurf,
 207                          enum native_attachment which,
 208                          void *winsys_drawable_handle)
 209 {
 210    struct pipe_resource *pres = rsurf->resources[which];
 211
 212    if (!pres)
 213       return TRUE;
 214
 215    rsurf->screen->flush_frontbuffer(rsurf->screen,
 216          pres, 0, 0, winsys_drawable_handle);
 217
 218    return TRUE;
 219 }