src/gallium/state_trackers/dri/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 #include "util/u_memory.h"
  30 #include "util/u_inlines.h"
  31 #include "pipe/p_context.h"
  32 #include "state_tracker/drm_api.h"
  33
  34 #include "dri_screen.h"
  35 #include "dri_context.h"
  36 #include "dri_drawable.h"
  37 #include "dri_st_api.h"
  38 #include "dri1_helper.h"
  39 #include "drisw.h"
  40
  41
  42 static INLINE void
  43 get_drawable_info(__DRIdrawable *dPriv, int *w, int *h)
  44 {
  45    __DRIscreen *sPriv = dPriv->driScreenPriv;
  46    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  47    int x, y;
  48
  49    loader->getDrawableInfo(dPriv,
  50                            &x, &y, w, h,
  51                            dPriv->loaderPrivate);
  52 }
  53
  54 static INLINE void
  55 put_image(__DRIdrawable *dPriv, void *data)
  56 {
  57    __DRIscreen *sPriv = dPriv->driScreenPriv;
  58    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  59
  60    loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
  61                     0, 0, dPriv->w, dPriv->h,
  62                     data, dPriv->loaderPrivate);
  63 }
  64
  65 void
  66 drisw_update_drawable_info(__DRIdrawable *dPriv)
  67 {
  68    get_drawable_info(dPriv, &dPriv->w, &dPriv->h);
  69 }
  70
  71 static INLINE void
  72 drisw_present_texture(__DRIdrawable *dPriv,
  73                       struct pipe_texture *ptex)
  74 {
  75    struct dri_drawable *drawable = dri_drawable(dPriv);
  76    struct dri_screen *screen = dri_screen(drawable->sPriv);
  77    struct pipe_context *pipe;
  78    struct pipe_surface *psurf;
  79    struct pipe_transfer *ptrans;
  80    void *pmap;
  81
  82    pipe = dri1_get_pipe_context(screen);
  83    psurf = dri1_get_pipe_surface(drawable, ptex);
  84    if (!pipe || !psurf)
  85       return;
  86
  87    ptrans = pipe->get_tex_transfer(pipe, ptex, 0, 0, 0,
  88                                    PIPE_TRANSFER_READ,
  89                                    0, 0, dPriv->w, dPriv->h);
  90
  91    pmap = pipe->transfer_map(pipe, ptrans);
  92
  93    assert(pmap);
  94
  95    put_image(dPriv, pmap);
  96
  97    pipe->transfer_unmap(pipe, ptrans);
  98
  99    pipe->tex_transfer_destroy(pipe, ptrans);
 100 }
 101
 102 static INLINE void
 103 drisw_invalidate_drawable(__DRIdrawable *dPriv)
 104 {
 105    struct dri_context *ctx = dri_get_current();
 106    struct dri_drawable *drawable = dri_drawable(dPriv);
 107
 108    drawable->texture_stamp = dPriv->lastStamp - 1;
 109
 110    /* check if swapping currently bound buffer */
 111    if (ctx && ctx->dPriv == dPriv)
 112       ctx->st->notify_invalid_framebuffer(ctx->st, drawable->stfb);
 113 }
 114
 115 static INLINE void
 116 drisw_copy_to_front(__DRIdrawable * dPriv,
 117                     struct pipe_texture *ptex)
 118 {
 119    drisw_present_texture(dPriv, ptex);
 120
 121    drisw_invalidate_drawable(dPriv);
 122 }
 123
 124 /*
 125  * Backend functions for st_framebuffer interface and swap_buffers.
 126  */
 127
 128 void
 129 drisw_flush_frontbuffer(struct dri_drawable *drawable,
 130                         enum st_attachment_type statt)
 131 {
 132    struct dri_context *ctx = dri_get_current();
 133    struct pipe_texture *ptex;
 134
 135    if (!ctx)
 136       return;
 137
 138    ptex = drawable->textures[statt];
 139
 140    if (ptex) {
 141       drisw_copy_to_front(ctx->dPriv, ptex);
 142    }
 143 }
 144
 145 void
 146 drisw_swap_buffers(__DRIdrawable *dPriv)
 147 {
 148    struct dri_context *ctx = dri_get_current();
 149    struct dri_drawable *drawable = dri_drawable(dPriv);
 150    struct pipe_texture *ptex;
 151
 152    if (!ctx)
 153       return;
 154
 155    ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 156
 157    if (ptex) {
 158       ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 159
 160       drisw_copy_to_front(dPriv, ptex);
 161    }
 162 }
 163
 164 /**
 165  * Allocate framebuffer attachments.
 166  *
 167  * During fixed-size operation, the function keeps allocating new attachments
 168  * as they are requested. Unused attachments are not removed, not until the
 169  * framebuffer is resized or destroyed.
 170  *
 171  * It should be possible for DRI1 and DRISW to share this function, but it
 172  * seems a better seperation and safer for each DRI version to provide its own
 173  * function.
 174  */
 175 void
 176 drisw_allocate_textures(struct dri_drawable *drawable,
 177                         unsigned mask)
 178 {
 179    struct dri_screen *screen = dri_screen(drawable->sPriv);
 180    struct pipe_texture templ;
 181    unsigned width, height;
 182    boolean resized;
 183    int i;
 184
 185    width  = drawable->dPriv->w;
 186    height = drawable->dPriv->h;
 187
 188    resized = (drawable->old_w != width ||
 189               drawable->old_h != height);
 190
 191    /* remove outdated textures */
 192    if (resized) {
 193       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 194          pipe_texture_reference(&drawable->textures[i], NULL);
 195    }
 196
 197    memset(&templ, 0, sizeof(templ));
 198    templ.target = PIPE_TEXTURE_2D;
 199    templ.width0 = width;
 200    templ.height0 = height;
 201    templ.depth0 = 1;
 202    templ.last_level = 0;
 203
 204    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 205       enum pipe_format format;
 206       unsigned tex_usage;
 207
 208       /* the texture already exists or not requested */
 209       if (drawable->textures[i] || !(mask & (1 << i))) {
 210          continue;
 211       }
 212
 213       switch (i) {
 214       case ST_ATTACHMENT_FRONT_LEFT:
 215       case ST_ATTACHMENT_BACK_LEFT:
 216       case ST_ATTACHMENT_FRONT_RIGHT:
 217       case ST_ATTACHMENT_BACK_RIGHT:
 218          format = drawable->stvis.color_format;
 219          tex_usage = PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 220                      PIPE_TEXTURE_USAGE_RENDER_TARGET;
 221          break;
 222       case ST_ATTACHMENT_DEPTH_STENCIL:
 223          format = drawable->stvis.depth_stencil_format;
 224          tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
 225          break;
 226       default:
 227          format = PIPE_FORMAT_NONE;
 228          break;
 229       }
 230
 231       if (format != PIPE_FORMAT_NONE) {
 232          templ.format = format;
 233          templ.tex_usage = tex_usage;
 234
 235          drawable->textures[i] =
 236             screen->pipe_screen->texture_create(screen->pipe_screen, &templ);
 237       }
 238    }
 239
 240    drawable->old_w = width;
 241    drawable->old_h = height;
 242 }
 243
 244 /*
 245  * Backend function for init_screen.
 246  */
 247
 248 static const __DRIextension *drisw_screen_extensions[] = {
 249    NULL
 250 };
 251
 252 const __DRIconfig **
 253 drisw_init_screen(__DRIscreen * sPriv)
 254 {
 255    struct dri_screen *screen;
 256    struct drm_create_screen_arg arg;
 257
 258    screen = CALLOC_STRUCT(dri_screen);
 259    if (!screen)
 260       return NULL;
 261
 262    screen->api = drm_api_create();
 263    screen->sPriv = sPriv;
 264    screen->fd = -1;
 265    sPriv->private = (void *)screen;
 266    sPriv->extensions = drisw_screen_extensions;
 267    arg.mode = DRM_CREATE_DRISW;
 268
 269    screen->pipe_screen = screen->api->create_screen(screen->api, -1, &arg);
 270    if (!screen->pipe_screen) {
 271       debug_printf("%s: failed to create pipe_screen\n", __FUNCTION__);
 272       goto fail;
 273    }
 274
 275    screen->smapi = dri_create_st_manager(screen);
 276    if (!screen->smapi)
 277       goto fail;
 278
 279    driParseOptionInfo(&screen->optionCache,
 280                       __driConfigOptions, __driNConfigOptions);
 281
 282    return dri_fill_in_modes(screen, 32);
 283 fail:
 284    dri_destroy_screen(sPriv);
 285    return NULL;
 286 }
 287
 288 /* vim: set sw=3 ts=8 sts=3 expandtab: */