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
  48 DEBUG_GET_ONCE_BOOL_OPTION(swrast_no_present, "SWRAST_NO_PRESENT", FALSE);
  49 static boolean swrast_no_present = FALSE;
  50
  51 static INLINE void
  52 get_drawable_info(__DRIdrawable *dPriv, int *w, int *h)
  53 {
  54    __DRIscreen *sPriv = dPriv->driScreenPriv;
  55    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  56    int x, y;
  57
  58    loader->getDrawableInfo(dPriv,
  59                            &x, &y, w, h,
  60                            dPriv->loaderPrivate);
  61 }
  62
  63 static INLINE void
  64 put_image(__DRIdrawable *dPriv, void *data, unsigned width, unsigned height)
  65 {
  66    __DRIscreen *sPriv = dPriv->driScreenPriv;
  67    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  68
  69    loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
  70                     0, 0, width, height,
  71                     data, dPriv->loaderPrivate);
  72 }
  73
  74 static void
  75 drisw_update_drawable_info(struct dri_drawable *drawable)
  76 {
  77    __DRIdrawable *dPriv = drawable->dPriv;
  78
  79    get_drawable_info(dPriv, &dPriv->w, &dPriv->h);
  80 }
  81
  82 static void
  83 drisw_put_image(struct dri_drawable *drawable,
  84                 void *data, unsigned width, unsigned height)
  85 {
  86    __DRIdrawable *dPriv = drawable->dPriv;
  87
  88    put_image(dPriv, data, width, height);
  89 }
  90
  91 static INLINE void
  92 drisw_present_texture(__DRIdrawable *dPriv,
  93                       struct pipe_resource *ptex)
  94 {
  95    struct dri_drawable *drawable = dri_drawable(dPriv);
  96    struct dri_screen *screen = dri_screen(drawable->sPriv);
  97    struct pipe_surface *psurf;
  98
  99    if (swrast_no_present)
 100       return;
 101
 102    psurf = dri1_get_pipe_surface(drawable, ptex);
 103    if (!psurf)
 104       return;
 105
 106    screen->base.screen->flush_frontbuffer(screen->base.screen, psurf, drawable);
 107 }
 108
 109 static INLINE void
 110 drisw_invalidate_drawable(__DRIdrawable *dPriv)
 111 {
 112    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 113    struct dri_drawable *drawable = dri_drawable(dPriv);
 114
 115    drawable->texture_stamp = dPriv->lastStamp - 1;
 116
 117    /* check if swapping currently bound buffer */
 118    if (ctx && ctx->dPriv == dPriv)
 119       ctx->st->notify_invalid_framebuffer(ctx->st, &drawable->base);
 120 }
 121
 122 static INLINE void
 123 drisw_copy_to_front(__DRIdrawable * dPriv,
 124                     struct pipe_resource *ptex)
 125 {
 126    drisw_present_texture(dPriv, ptex);
 127
 128    drisw_invalidate_drawable(dPriv);
 129 }
 130
 131 /*
 132  * Backend functions for st_framebuffer interface and swap_buffers.
 133  */
 134
 135 static void
 136 drisw_swap_buffers(__DRIdrawable *dPriv)
 137 {
 138    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 139    struct dri_drawable *drawable = dri_drawable(dPriv);
 140    struct pipe_resource *ptex;
 141
 142    if (!ctx)
 143       return;
 144
 145    ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 146
 147    if (ptex) {
 148       ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 149
 150       drisw_copy_to_front(dPriv, ptex);
 151    }
 152 }
 153
 154 static void
 155 drisw_flush_frontbuffer(struct dri_drawable *drawable,
 156                         enum st_attachment_type statt)
 157 {
 158    struct dri_context *ctx = dri_get_current(drawable->sPriv);
 159    struct pipe_resource *ptex;
 160
 161    if (!ctx)
 162       return;
 163
 164    ptex = drawable->textures[statt];
 165
 166    if (ptex) {
 167       drisw_copy_to_front(ctx->dPriv, ptex);
 168    }
 169 }
 170
 171 /**
 172  * Allocate framebuffer attachments.
 173  *
 174  * During fixed-size operation, the function keeps allocating new attachments
 175  * as they are requested. Unused attachments are not removed, not until the
 176  * framebuffer is resized or destroyed.
 177  *
 178  * It should be possible for DRI1 and DRISW to share this function, but it
 179  * seems a better seperation and safer for each DRI version to provide its own
 180  * function.
 181  */
 182 static void
 183 drisw_allocate_textures(struct dri_drawable *drawable,
 184                         const enum st_attachment_type *statts,
 185                         unsigned count)
 186 {
 187    struct dri_screen *screen = dri_screen(drawable->sPriv);
 188    struct pipe_resource templ;
 189    unsigned width, height;
 190    boolean resized;
 191    int i;
 192
 193    width  = drawable->dPriv->w;
 194    height = drawable->dPriv->h;
 195
 196    resized = (drawable->old_w != width ||
 197               drawable->old_h != height);
 198
 199    /* remove outdated textures */
 200    if (resized) {
 201       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 202          pipe_resource_reference(&drawable->textures[i], NULL);
 203    }
 204
 205    memset(&templ, 0, sizeof(templ));
 206    templ.target = PIPE_TEXTURE_2D;
 207    templ.width0 = width;
 208    templ.height0 = height;
 209    templ.depth0 = 1;
 210    templ.last_level = 0;
 211
 212    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 213       enum pipe_format format;
 214       unsigned bind;
 215
 216       /* the texture already exists or not requested */
 217       if (drawable->textures[statts[i]])
 218          continue;
 219
 220       dri_drawable_get_format(drawable, statts[i], &format, &bind);
 221
 222       /* if we don't do any present, no need for display targets */
 223       if (statts[i] != ST_ATTACHMENT_DEPTH_STENCIL && !swrast_no_present)
 224          bind |= PIPE_BIND_DISPLAY_TARGET;
 225
 226       if (format == PIPE_FORMAT_NONE)
 227          continue;
 228
 229       templ.format = format;
 230       templ.bind = bind;
 231
 232       drawable->textures[statts[i]] =
 233          screen->base.screen->resource_create(screen->base.screen, &templ);
 234    }
 235
 236    drawable->old_w = width;
 237    drawable->old_h = height;
 238 }
 239
 240 /*
 241  * Backend function for init_screen.
 242  */
 243
 244 static const __DRIextension *drisw_screen_extensions[] = {
 245    NULL
 246 };
 247
 248 static struct drisw_loader_funcs drisw_lf = {
 249    .put_image = drisw_put_image
 250 };
 251
 252 static const __DRIconfig **
 253 drisw_init_screen(__DRIscreen * sPriv)
 254 {
 255    const __DRIconfig **configs;
 256    struct dri_screen *screen;
 257    struct pipe_screen *pscreen;
 258
 259    screen = CALLOC_STRUCT(dri_screen);
 260    if (!screen)
 261       return NULL;
 262
 263    screen->sPriv = sPriv;
 264    screen->fd = -1;
 265    screen->allocate_textures = drisw_allocate_textures;
 266    screen->update_drawable_info = drisw_update_drawable_info;
 267    screen->flush_frontbuffer = drisw_flush_frontbuffer;
 268
 269    swrast_no_present = debug_get_option_swrast_no_present();
 270
 271    sPriv->private = (void *)screen;
 272    sPriv->extensions = drisw_screen_extensions;
 273
 274    pscreen = drisw_create_screen(&drisw_lf);
 275    /* dri_init_screen_helper checks pscreen for us */
 276
 277    configs = dri_init_screen_helper(screen, pscreen, 32);
 278    if (!configs)
 279       goto fail;
 280
 281    return configs;
 282 fail:
 283    dri_destroy_screen_helper(screen);
 284    FREE(screen);
 285    return NULL;
 286 }
 287
 288 /**
 289  * DRI driver virtual function table.
 290  *
 291  * DRI versions differ in their implementation of init_screen and swap_buffers.
 292  */
 293 const struct __DriverAPIRec driDriverAPI = {
 294    .DestroyScreen = dri_destroy_screen,
 295    .CreateContext = dri_create_context,
 296    .DestroyContext = dri_destroy_context,
 297    .CreateBuffer = dri_create_buffer,
 298    .DestroyBuffer = dri_destroy_buffer,
 299    .MakeCurrent = dri_make_current,
 300    .UnbindContext = dri_unbind_context,
 301
 302    .InitScreen = drisw_init_screen,
 303    .SwapBuffers = drisw_swap_buffers,
 304 };
 305
 306 /* This is the table of extensions that the loader will dlsym() for. */
 307 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 308     &driCoreExtension.base,
 309     &driSWRastExtension.base,
 310     NULL
 311 };
 312
 313 /* vim: set sw=3 ts=8 sts=3 expandtab: */