src/gallium/state_trackers/wgl/stw_st.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2010 LunarG Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Chia-I Wu <olv@lunarg.com>
  26  */
  27
  28 #include "util/u_memory.h"
  29 #include "util/u_inlines.h"
  30 #include "util/u_atomic.h"
  31 #include "state_tracker/st_gl_api.h" /* for st_gl_api_create */
  32
  33 #include "stw_st.h"
  34 #include "stw_device.h"
  35 #include "stw_framebuffer.h"
  36 #include "stw_pixelformat.h"
  37
  38 struct stw_st_framebuffer {
  39    struct st_framebuffer_iface base;
  40
  41    struct stw_framebuffer *fb;
  42    struct st_visual stvis;
  43
  44    struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
  45    unsigned texture_width, texture_height;
  46    unsigned texture_mask;
  47 };
  48
  49 static inline struct stw_st_framebuffer *
  50 stw_st_framebuffer(struct st_framebuffer_iface *stfb)
  51 {
  52    return (struct stw_st_framebuffer *) stfb;
  53 }
  54
  55 /**
  56  * Remove outdated textures and create the requested ones.
  57  */
  58 static void
  59 stw_st_framebuffer_validate_locked(struct st_framebuffer_iface *stfb,
  60                                    unsigned width, unsigned height,
  61                                    unsigned mask)
  62 {
  63    struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
  64    struct pipe_resource templ;
  65    unsigned i;
  66
  67    /* remove outdated textures */
  68    if (stwfb->texture_width != width || stwfb->texture_height != height) {
  69       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
  70          pipe_resource_reference(&stwfb->textures[i], NULL);
  71    }
  72
  73    memset(&templ, 0, sizeof(templ));
  74    templ.target = PIPE_TEXTURE_2D;
  75    templ.width0 = width;
  76    templ.height0 = height;
  77    templ.depth0 = 1;
  78    templ.array_size = 1;
  79    templ.last_level = 0;
  80    templ.nr_samples = stwfb->stvis.samples;
  81
  82    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
  83       enum pipe_format format;
  84       unsigned bind;
  85
  86       /* the texture already exists or not requested */
  87       if (stwfb->textures[i] || !(mask & (1 << i))) {
  88          /* remember the texture */
  89          if (stwfb->textures[i])
  90             mask |= (1 << i);
  91          continue;
  92       }
  93
  94       switch (i) {
  95       case ST_ATTACHMENT_FRONT_LEFT:
  96       case ST_ATTACHMENT_BACK_LEFT:
  97          format = stwfb->stvis.color_format;
  98          bind = PIPE_BIND_DISPLAY_TARGET |
  99                 PIPE_BIND_SAMPLER_VIEW |
 100                 PIPE_BIND_RENDER_TARGET;
 101          break;
 102       case ST_ATTACHMENT_DEPTH_STENCIL:
 103          format = stwfb->stvis.depth_stencil_format;
 104          bind = PIPE_BIND_DEPTH_STENCIL;
 105          break;
 106       default:
 107          format = PIPE_FORMAT_NONE;
 108          break;
 109       }
 110
 111       if (format != PIPE_FORMAT_NONE) {
 112          templ.format = format;
 113          templ.bind = bind;
 114
 115          stwfb->textures[i] =
 116             stw_dev->screen->resource_create(stw_dev->screen, &templ);
 117       }
 118    }
 119
 120    stwfb->texture_width = width;
 121    stwfb->texture_height = height;
 122    stwfb->texture_mask = mask;
 123 }
 124
 125 static boolean
 126 stw_st_framebuffer_validate(struct st_context_iface *stctx,
 127                             struct st_framebuffer_iface *stfb,
 128                             const enum st_attachment_type *statts,
 129                             unsigned count,
 130                             struct pipe_resource **out)
 131 {
 132    struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
 133    unsigned statt_mask, i;
 134
 135    statt_mask = 0x0;
 136    for (i = 0; i < count; i++)
 137       statt_mask |= 1 << statts[i];
 138
 139    pipe_mutex_lock(stwfb->fb->mutex);
 140
 141    if (stwfb->fb->must_resize || (statt_mask & ~stwfb->texture_mask)) {
 142       stw_st_framebuffer_validate_locked(&stwfb->base,
 143             stwfb->fb->width, stwfb->fb->height, statt_mask);
 144       stwfb->fb->must_resize = FALSE;
 145    }
 146
 147    for (i = 0; i < count; i++) {
 148       out[i] = NULL;
 149       pipe_resource_reference(&out[i], stwfb->textures[statts[i]]);
 150    }
 151
 152    stw_framebuffer_release(stwfb->fb);
 153
 154    return TRUE;
 155 }
 156
 157 /**
 158  * Present an attachment of the framebuffer.
 159  */
 160 static boolean
 161 stw_st_framebuffer_present_locked(HDC hdc,
 162                                   struct st_framebuffer_iface *stfb,
 163                                   enum st_attachment_type statt)
 164 {
 165    struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
 166    struct pipe_resource *resource;
 167
 168    resource = stwfb->textures[statt];
 169    if (resource) {
 170       stw_framebuffer_present_locked(hdc, stwfb->fb, resource);
 171    }
 172
 173    return TRUE;
 174 }
 175
 176 static boolean
 177 stw_st_framebuffer_flush_front(struct st_context_iface *stctx,
 178                                struct st_framebuffer_iface *stfb,
 179                                enum st_attachment_type statt)
 180 {
 181    struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
 182    boolean ret;
 183    HDC hDC;
 184
 185    pipe_mutex_lock(stwfb->fb->mutex);
 186
 187    /* We must not cache HDCs anywhere, as they can be invalidated by the
 188     * application, or screen resolution changes. */
 189
 190    hDC = GetDC(stwfb->fb->hWnd);
 191
 192    ret = stw_st_framebuffer_present_locked(hDC, &stwfb->base, statt);
 193
 194    ReleaseDC(stwfb->fb->hWnd, hDC);
 195
 196    return ret;
 197 }
 198
 199 /**
 200  * Create a framebuffer interface.
 201  */
 202 struct st_framebuffer_iface *
 203 stw_st_create_framebuffer(struct stw_framebuffer *fb)
 204 {
 205    struct stw_st_framebuffer *stwfb;
 206
 207    stwfb = CALLOC_STRUCT(stw_st_framebuffer);
 208    if (!stwfb)
 209       return NULL;
 210
 211    stwfb->fb = fb;
 212    stwfb->stvis = fb->pfi->stvis;
 213
 214    stwfb->base.visual = &stwfb->stvis;
 215    p_atomic_set(&stwfb->base.stamp, 1);
 216    stwfb->base.flush_front = stw_st_framebuffer_flush_front;
 217    stwfb->base.validate = stw_st_framebuffer_validate;
 218
 219    return &stwfb->base;
 220 }
 221
 222 /**
 223  * Destroy a framebuffer interface.
 224  */
 225 void
 226 stw_st_destroy_framebuffer_locked(struct st_framebuffer_iface *stfb)
 227 {
 228    struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
 229    int i;
 230
 231    for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 232       pipe_resource_reference(&stwfb->textures[i], NULL);
 233
 234    FREE(stwfb);
 235 }
 236
 237 /**
 238  * Swap the buffers of the given framebuffer.
 239  */
 240 boolean
 241 stw_st_swap_framebuffer_locked(HDC hdc, struct st_framebuffer_iface *stfb)
 242 {
 243    struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
 244    unsigned front = ST_ATTACHMENT_FRONT_LEFT, back = ST_ATTACHMENT_BACK_LEFT;
 245    struct pipe_resource *ptex;
 246    unsigned mask;
 247
 248    /* swap the textures */
 249    ptex = stwfb->textures[front];
 250    stwfb->textures[front] = stwfb->textures[back];
 251    stwfb->textures[back] = ptex;
 252
 253    /* convert to mask */
 254    front = 1 << front;
 255    back = 1 << back;
 256
 257    /* swap the bits in mask */
 258    mask = stwfb->texture_mask & ~(front | back);
 259    if (stwfb->texture_mask & front)
 260       mask |= back;
 261    if (stwfb->texture_mask & back)
 262       mask |= front;
 263    stwfb->texture_mask = mask;
 264
 265    front = ST_ATTACHMENT_FRONT_LEFT;
 266    return stw_st_framebuffer_present_locked(hdc, &stwfb->base, front);
 267 }
 268
 269
 270 /**
 271  * Return the pipe_resource that correspond to given buffer.
 272  */
 273 struct pipe_resource *
 274 stw_get_framebuffer_resource(struct st_framebuffer_iface *stfb,
 275                              enum st_attachment_type att)
 276 {
 277    struct stw_st_framebuffer *stwfb = stw_st_framebuffer(stfb);
 278    return stwfb->textures[att];
 279 }
 280
 281
 282 /**
 283  * Create an st_api of the state tracker.
 284  */
 285 struct st_api *
 286 stw_st_create_api(void)
 287 {
 288    return st_gl_api_create();
 289 }