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
  47 DEBUG_GET_ONCE_BOOL_OPTION(swrast_no_present, "SWRAST_NO_PRESENT", FALSE);
  48 static boolean swrast_no_present = FALSE;
  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
  97    if (swrast_no_present)
  98       return;
  99
 100    screen->base.screen->flush_frontbuffer(screen->base.screen, ptex, 0, 0, drawable);
 101 }
 102
 103 static INLINE void
 104 drisw_invalidate_drawable(__DRIdrawable *dPriv)
 105 {
 106    struct dri_drawable *drawable = dri_drawable(dPriv);
 107
 108    drawable->texture_stamp = dPriv->lastStamp - 1;
 109
 110    p_atomic_inc(&drawable->base.stamp);
 111 }
 112
 113 static INLINE void
 114 drisw_copy_to_front(__DRIdrawable * dPriv,
 115                     struct pipe_resource *ptex)
 116 {
 117    drisw_present_texture(dPriv, ptex);
 118
 119    drisw_invalidate_drawable(dPriv);
 120 }
 121
 122 /*
 123  * Backend functions for st_framebuffer interface and swap_buffers.
 124  */
 125
 126 static void
 127 drisw_swap_buffers(__DRIdrawable *dPriv)
 128 {
 129    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 130    struct dri_drawable *drawable = dri_drawable(dPriv);
 131    struct pipe_resource *ptex;
 132
 133    if (!ctx)
 134       return;
 135
 136    ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 137
 138    if (ptex) {
 139       if (ctx->pp && drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL])
 140          pp_run(ctx->pp, ptex, ptex, drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL]);
 141
 142       ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL);
 143
 144       drisw_copy_to_front(dPriv, ptex);
 145    }
 146 }
 147
 148 static void
 149 drisw_flush_frontbuffer(struct dri_drawable *drawable,
 150                         enum st_attachment_type statt)
 151 {
 152    struct dri_context *ctx = dri_get_current(drawable->sPriv);
 153    struct pipe_resource *ptex;
 154
 155    if (!ctx)
 156       return;
 157
 158    ptex = drawable->textures[statt];
 159
 160    if (ptex) {
 161       drisw_copy_to_front(ctx->dPriv, ptex);
 162    }
 163 }
 164
 165 /**
 166  * Allocate framebuffer attachments.
 167  *
 168  * During fixed-size operation, the function keeps allocating new attachments
 169  * as they are requested. Unused attachments are not removed, not until the
 170  * framebuffer is resized or destroyed.
 171  */
 172 static void
 173 drisw_allocate_textures(struct dri_drawable *drawable,
 174                         const enum st_attachment_type *statts,
 175                         unsigned count)
 176 {
 177    struct dri_screen *screen = dri_screen(drawable->sPriv);
 178    struct pipe_resource templ;
 179    unsigned width, height;
 180    boolean resized;
 181    unsigned i;
 182
 183    width  = drawable->dPriv->w;
 184    height = drawable->dPriv->h;
 185
 186    resized = (drawable->old_w != width ||
 187               drawable->old_h != height);
 188
 189    /* remove outdated textures */
 190    if (resized) {
 191       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 192          pipe_resource_reference(&drawable->textures[i], NULL);
 193    }
 194
 195    memset(&templ, 0, sizeof(templ));
 196    templ.target = screen->target;
 197    templ.width0 = width;
 198    templ.height0 = height;
 199    templ.depth0 = 1;
 200    templ.array_size = 1;
 201    templ.last_level = 0;
 202
 203    for (i = 0; i < count; i++) {
 204       enum pipe_format format;
 205       unsigned bind;
 206
 207       /* the texture already exists or not requested */
 208       if (drawable->textures[statts[i]])
 209          continue;
 210
 211       dri_drawable_get_format(drawable, statts[i], &format, &bind);
 212
 213       /* if we don't do any present, no need for display targets */
 214       if (statts[i] != ST_ATTACHMENT_DEPTH_STENCIL && !swrast_no_present)
 215          bind |= PIPE_BIND_DISPLAY_TARGET;
 216
 217       if (format == PIPE_FORMAT_NONE)
 218          continue;
 219
 220       templ.format = format;
 221       templ.bind = bind;
 222
 223       drawable->textures[statts[i]] =
 224          screen->base.screen->resource_create(screen->base.screen, &templ);
 225    }
 226
 227    drawable->old_w = width;
 228    drawable->old_h = height;
 229 }
 230
 231 /*
 232  * Backend function for init_screen.
 233  */
 234
 235 static const __DRIextension *drisw_screen_extensions[] = {
 236    &driTexBufferExtension.base,
 237    NULL
 238 };
 239
 240 static struct drisw_loader_funcs drisw_lf = {
 241    .put_image = drisw_put_image
 242 };
 243
 244 static const __DRIconfig **
 245 drisw_init_screen(__DRIscreen * sPriv)
 246 {
 247    const __DRIconfig **configs;
 248    struct dri_screen *screen;
 249    struct pipe_screen *pscreen;
 250
 251    screen = CALLOC_STRUCT(dri_screen);
 252    if (!screen)
 253       return NULL;
 254
 255    screen->sPriv = sPriv;
 256    screen->fd = -1;
 257
 258    swrast_no_present = debug_get_option_swrast_no_present();
 259
 260    sPriv->private = (void *)screen;
 261    sPriv->extensions = drisw_screen_extensions;
 262
 263    pscreen = drisw_create_screen(&drisw_lf);
 264    /* dri_init_screen_helper checks pscreen for us */
 265
 266    configs = dri_init_screen_helper(screen, pscreen, 32);
 267    if (!configs)
 268       goto fail;
 269
 270    return configs;
 271 fail:
 272    dri_destroy_screen_helper(screen);
 273    FREE(screen);
 274    return NULL;
 275 }
 276
 277 static boolean
 278 drisw_create_buffer(__DRIscreen * sPriv,
 279                     __DRIdrawable * dPriv,
 280                     const struct gl_config * visual, boolean isPixmap)
 281 {
 282    struct dri_drawable *drawable = NULL;
 283
 284    if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
 285       return FALSE;
 286
 287    drawable = dPriv->driverPrivate;
 288
 289    drawable->allocate_textures = drisw_allocate_textures;
 290    drawable->update_drawable_info = drisw_update_drawable_info;
 291    drawable->flush_frontbuffer = drisw_flush_frontbuffer;
 292
 293    return TRUE;
 294 }
 295
 296 /**
 297  * DRI driver virtual function table.
 298  *
 299  * DRI versions differ in their implementation of init_screen and swap_buffers.
 300  */
 301 const struct __DriverAPIRec driDriverAPI = {
 302    .InitScreen = drisw_init_screen,
 303    .DestroyScreen = dri_destroy_screen,
 304    .CreateContext = dri_create_context,
 305    .DestroyContext = dri_destroy_context,
 306    .CreateBuffer = drisw_create_buffer,
 307    .DestroyBuffer = dri_destroy_buffer,
 308    .MakeCurrent = dri_make_current,
 309    .UnbindContext = dri_unbind_context,
 310
 311    .SwapBuffers = drisw_swap_buffers,
 312 };
 313
 314 /* This is the table of extensions that the loader will dlsym() for. */
 315 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 316     &driCoreExtension.base,
 317     &driSWRastExtension.base,
 318     NULL
 319 };
 320
 321 /* vim: set sw=3 ts=8 sts=3 expandtab: */