src/gallium/state_trackers/dri/sw/drisw.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009, VMware, Inc.
   4  * All Rights Reserved.
   5  * Copyright 2010 George Sapountzis <gsapountzis@gmail.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 /* TODO:
  30  *
  31  * xshm / texture_from_pixmap / EGLImage:
  32  *
  33  * Allow the loaders to use the XSHM extension. It probably requires callbacks
  34  * for createImage/destroyImage similar to DRI2 getBuffers.
  35  */
  36
  37 #include "util/u_format.h"
  38 #include "util/u_memory.h"
  39 #include "util/u_inlines.h"
  40 #include "pipe/p_context.h"
  41 #include "state_tracker/drisw_api.h"
  42
  43 #include "dri_screen.h"
  44 #include "dri_context.h"
  45 #include "dri_drawable.h"
  46 #include "dri1_helper.h"
  47 #include "drisw.h"
  48
  49
  50 static INLINE void
  51 get_drawable_info(__DRIdrawable *dPriv, int *w, int *h)
  52 {
  53    __DRIscreen *sPriv = dPriv->driScreenPriv;
  54    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  55    int x, y;
  56
  57    loader->getDrawableInfo(dPriv,
  58                            &x, &y, w, h,
  59                            dPriv->loaderPrivate);
  60 }
  61
  62 static INLINE void
  63 put_image(__DRIdrawable *dPriv, void *data, unsigned width, unsigned height)
  64 {
  65    __DRIscreen *sPriv = dPriv->driScreenPriv;
  66    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  67
  68    loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
  69                     0, 0, width, height,
  70                     data, dPriv->loaderPrivate);
  71 }
  72
  73 static void
  74 drisw_update_drawable_info(struct dri_drawable *drawable)
  75 {
  76    __DRIdrawable *dPriv = drawable->dPriv;
  77
  78    get_drawable_info(dPriv, &dPriv->w, &dPriv->h);
  79 }
  80
  81 static void
  82 drisw_put_image(struct dri_drawable *drawable,
  83                 void *data, unsigned width, unsigned height)
  84 {
  85    __DRIdrawable *dPriv = drawable->dPriv;
  86
  87    put_image(dPriv, data, width, height);
  88 }
  89
  90 static INLINE void
  91 drisw_present_texture(__DRIdrawable *dPriv,
  92                       struct pipe_resource *ptex)
  93 {
  94    struct dri_drawable *drawable = dri_drawable(dPriv);
  95    struct dri_screen *screen = dri_screen(drawable->sPriv);
  96    struct pipe_surface *psurf;
  97
  98    psurf = dri1_get_pipe_surface(drawable, ptex);
  99    if (!psurf)
 100       return;
 101
 102    screen->base.screen->flush_frontbuffer(screen->base.screen, psurf, drawable);
 103 }
 104
 105 static INLINE void
 106 drisw_invalidate_drawable(__DRIdrawable *dPriv)
 107 {
 108    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 109    struct dri_drawable *drawable = dri_drawable(dPriv);
 110
 111    drawable->texture_stamp = dPriv->lastStamp - 1;
 112
 113    /* check if swapping currently bound buffer */
 114    if (ctx && ctx->dPriv == dPriv)
 115       ctx->st->notify_invalid_framebuffer(ctx->st, &drawable->base);
 116 }
 117
 118 static INLINE void
 119 drisw_copy_to_front(__DRIdrawable * dPriv,
 120                     struct pipe_resource *ptex)
 121 {
 122    drisw_present_texture(dPriv, ptex);
 123
 124    drisw_invalidate_drawable(dPriv);
 125 }
 126
 127 /*
 128  * Backend functions for st_framebuffer interface and swap_buffers.
 129  */
 130
 131 void
 132 drisw_swap_buffers(__DRIdrawable *dPriv)
 133 {
 134    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 135    struct dri_drawable *drawable = dri_drawable(dPriv);
 136    struct pipe_resource *ptex;
 137
 138    if (!ctx)
 139       return;
 140
 141    ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 142
 143    if (ptex) {
 144       ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 145
 146       drisw_copy_to_front(dPriv, ptex);
 147    }
 148 }
 149
 150 static void
 151 drisw_flush_frontbuffer(struct dri_drawable *drawable,
 152                         enum st_attachment_type statt)
 153 {
 154    struct dri_context *ctx = dri_get_current(drawable->sPriv);
 155    struct pipe_resource *ptex;
 156
 157    if (!ctx)
 158       return;
 159
 160    ptex = drawable->textures[statt];
 161
 162    if (ptex) {
 163       drisw_copy_to_front(ctx->dPriv, ptex);
 164    }
 165 }
 166
 167 /**
 168  * Allocate framebuffer attachments.
 169  *
 170  * During fixed-size operation, the function keeps allocating new attachments
 171  * as they are requested. Unused attachments are not removed, not until the
 172  * framebuffer is resized or destroyed.
 173  *
 174  * It should be possible for DRI1 and DRISW to share this function, but it
 175  * seems a better seperation and safer for each DRI version to provide its own
 176  * function.
 177  */
 178 static void
 179 drisw_allocate_textures(struct dri_drawable *drawable,
 180                         const enum st_attachment_type *statts,
 181                         unsigned count)
 182 {
 183    struct dri_screen *screen = dri_screen(drawable->sPriv);
 184    struct pipe_resource templ;
 185    unsigned width, height;
 186    boolean resized;
 187    int i;
 188
 189    width  = drawable->dPriv->w;
 190    height = drawable->dPriv->h;
 191
 192    resized = (drawable->old_w != width ||
 193               drawable->old_h != height);
 194
 195    /* remove outdated textures */
 196    if (resized) {
 197       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 198          pipe_resource_reference(&drawable->textures[i], NULL);
 199    }
 200
 201    memset(&templ, 0, sizeof(templ));
 202    templ.target = PIPE_TEXTURE_2D;
 203    templ.width0 = width;
 204    templ.height0 = height;
 205    templ.depth0 = 1;
 206    templ.last_level = 0;
 207
 208    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 209       enum pipe_format format;
 210       unsigned bind;
 211
 212       /* the texture already exists or not requested */
 213       if (drawable->textures[statts[i]])
 214          continue;
 215
 216       dri_drawable_get_format(drawable, statts[i], &format, &bind);
 217
 218       if (statts[i] != ST_ATTACHMENT_DEPTH_STENCIL)
 219          bind |= PIPE_BIND_DISPLAY_TARGET;
 220
 221       if (format == PIPE_FORMAT_NONE)
 222          continue;
 223
 224       templ.format = format;
 225       templ.bind = bind;
 226
 227       drawable->textures[statts[i]] =
 228          screen->base.screen->resource_create(screen->base.screen, &templ);
 229    }
 230
 231    drawable->old_w = width;
 232    drawable->old_h = height;
 233 }
 234
 235 /*
 236  * Backend function for init_screen.
 237  */
 238
 239 static const __DRIextension *drisw_screen_extensions[] = {
 240    NULL
 241 };
 242
 243 static struct drisw_loader_funcs drisw_lf = {
 244    .put_image = drisw_put_image
 245 };
 246
 247 const __DRIconfig **
 248 drisw_init_screen(__DRIscreen * sPriv)
 249 {
 250    const __DRIconfig **configs;
 251    struct dri_screen *screen;
 252    struct pipe_screen *pscreen;
 253
 254    screen = CALLOC_STRUCT(dri_screen);
 255    if (!screen)
 256       return NULL;
 257
 258    screen->api = NULL; /* not needed */
 259    screen->sPriv = sPriv;
 260    screen->fd = -1;
 261    screen->allocate_textures = drisw_allocate_textures;
 262    screen->update_drawable_info = drisw_update_drawable_info;
 263    screen->flush_frontbuffer = drisw_flush_frontbuffer;
 264
 265    sPriv->private = (void *)screen;
 266    sPriv->extensions = drisw_screen_extensions;
 267
 268    pscreen = drisw_create_screen(&drisw_lf);
 269    /* dri_init_screen_helper checks pscreen for us */
 270
 271    configs = dri_init_screen_helper(screen, pscreen, 32);
 272    if (!configs)
 273       goto fail;
 274
 275    return configs;
 276 fail:
 277    dri_destroy_screen_helper(screen);
 278    FREE(screen);
 279    return NULL;
 280 }
 281
 282 /* This is the table of extensions that the loader will dlsym() for. */
 283 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 284     &driCoreExtension.base,
 285     &driSWRastExtension.base,
 286     NULL
 287 };
 288
 289 /* vim: set sw=3 ts=8 sts=3 expandtab: */