src/gallium/state_trackers/wgl/shared/stw_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <windows.h>
  29
  30 #include "main/mtypes.h"
  31 #include "main/context.h"
  32 #include "pipe/p_compiler.h"
  33 #include "pipe/p_context.h"
  34 #include "state_tracker/st_context.h"
  35 #include "state_tracker/st_public.h"
  36 #include "shared/stw_device.h"
  37 #include "shared/stw_winsys.h"
  38 #include "shared/stw_framebuffer.h"
  39 #include "shared/stw_pixelformat.h"
  40 #include "stw_public.h"
  41 #include "stw_context.h"
  42
  43 static HDC current_hdc = NULL;
  44 static UINT_PTR current_hglrc = 0;
  45
  46 BOOL
  47 stw_copy_context(
  48    UINT_PTR hglrcSrc,
  49    UINT_PTR hglrcDst,
  50    UINT mask )
  51 {
  52    struct stw_context *src;
  53    struct stw_context *dst;
  54    BOOL ret = FALSE;
  55
  56    pipe_mutex_lock( stw_dev->mutex );
  57
  58    src = stw_lookup_context( hglrcSrc );
  59    dst = stw_lookup_context( hglrcDst );
  60
  61    if (src && dst) {
  62       /* FIXME */
  63       (void) src;
  64       (void) dst;
  65       (void) mask;
  66    }
  67
  68    pipe_mutex_unlock( stw_dev->mutex );
  69
  70    return ret;
  71 }
  72
  73 UINT_PTR
  74 stw_create_layer_context(
  75    HDC hdc,
  76    int iLayerPlane )
  77 {
  78    uint pfi;
  79    const struct pixelformat_info *pf = NULL;
  80    struct stw_context *ctx = NULL;
  81    GLvisual *visual = NULL;
  82    struct pipe_context *pipe = NULL;
  83    UINT_PTR hglrc = 0;
  84
  85    if(!stw_dev)
  86       return 0;
  87
  88    if (iLayerPlane != 0)
  89       return 0;
  90
  91    pfi = stw_pixelformat_get( hdc );
  92    if (pfi == 0)
  93       return 0;
  94
  95    pf = pixelformat_get_info( pfi - 1 );
  96
  97    ctx = CALLOC_STRUCT( stw_context );
  98    if (ctx == NULL)
  99       return 0;
 100
 101    ctx->hdc = hdc;
 102    ctx->color_bits = GetDeviceCaps( ctx->hdc, BITSPIXEL );
 103
 104    /* Create visual based on flags
 105     */
 106    visual = _mesa_create_visual(
 107       GL_TRUE,
 108       (pf->flags & PF_FLAG_DOUBLEBUFFER) ? GL_TRUE : GL_FALSE,
 109       GL_FALSE,
 110       pf->color.redbits,
 111       pf->color.greenbits,
 112       pf->color.bluebits,
 113       pf->alpha.alphabits,
 114       0,
 115       pf->depth.depthbits,
 116       pf->depth.stencilbits,
 117       0,
 118       0,
 119       0,
 120       0,
 121       (pf->flags & PF_FLAG_MULTISAMPLED) ? stw_query_samples() : 0 );
 122    if (visual == NULL)
 123       goto fail;
 124
 125    pipe = stw_dev->stw_winsys->create_context( stw_dev->screen );
 126    if (pipe == NULL)
 127       goto fail;
 128
 129    assert(!pipe->priv);
 130    pipe->priv = hdc;
 131
 132    ctx->st = st_create_context( pipe, visual, NULL );
 133    if (ctx->st == NULL)
 134       goto fail;
 135
 136    ctx->st->ctx->DriverCtx = ctx;
 137
 138    pipe_mutex_lock( stw_dev->mutex );
 139    {
 140       UINT_PTR i;
 141
 142       for (i = 0; i < STW_CONTEXT_MAX; i++) {
 143          if (stw_dev->ctx_array[i].ctx == NULL) {
 144             /* success:
 145              */
 146             stw_dev->ctx_array[i].ctx = ctx;
 147             hglrc = i + 1;
 148             break;
 149          }
 150       }
 151    }
 152    pipe_mutex_unlock( stw_dev->mutex );
 153
 154    /* Success?
 155     */
 156    if (hglrc != 0)
 157       return hglrc;
 158
 159 fail:
 160    if (visual)
 161       _mesa_destroy_visual( visual );
 162
 163    if (pipe)
 164       pipe->destroy( pipe );
 165
 166    FREE( ctx );
 167    return 0;
 168 }
 169
 170 BOOL
 171 stw_delete_context(
 172    UINT_PTR hglrc )
 173 {
 174    struct stw_context *ctx ;
 175    BOOL ret = FALSE;
 176
 177    if (!stw_dev)
 178       return FALSE;
 179
 180    pipe_mutex_lock( stw_dev->mutex );
 181
 182    ctx = stw_lookup_context(hglrc);
 183    if (ctx) {
 184       GLcontext *glctx = ctx->st->ctx;
 185       GET_CURRENT_CONTEXT( glcurctx );
 186       struct stw_framebuffer *fb;
 187
 188       /* Unbind current if deleting current context.
 189        */
 190       if (glcurctx == glctx)
 191          st_make_current( NULL, NULL, NULL );
 192
 193       fb = framebuffer_from_hdc( ctx->hdc );
 194       if (fb)
 195          framebuffer_destroy( fb );
 196
 197       if (WindowFromDC( ctx->hdc ) != NULL)
 198          ReleaseDC( WindowFromDC( ctx->hdc ), ctx->hdc );
 199
 200       st_destroy_context( ctx->st );
 201
 202       FREE( ctx );
 203
 204       stw_dev->ctx_array[hglrc - 1].ctx = NULL;
 205
 206       ret = TRUE;
 207    }
 208
 209    pipe_mutex_unlock( stw_dev->mutex );
 210
 211    return ret;
 212 }
 213
 214 BOOL
 215 stw_release_context(
 216    UINT_PTR hglrc )
 217 {
 218    BOOL ret = FALSE;
 219
 220    if (!stw_dev)
 221       return ret;
 222
 223    pipe_mutex_lock( stw_dev->mutex );
 224    {
 225       struct stw_context *ctx;
 226
 227       /* XXX: The expectation is that ctx is the same context which is
 228        * current for this thread.  We should check that and return False
 229        * if not the case.
 230        */
 231       ctx = stw_lookup_context( hglrc );
 232       if (ctx == NULL)
 233          goto done;
 234
 235       if (stw_make_current( NULL, 0 ) == FALSE)
 236          goto done;
 237
 238       ret = TRUE;
 239    }
 240 done:
 241    pipe_mutex_unlock( stw_dev->mutex );
 242
 243    return ret;
 244 }
 245
 246 /* Find the width and height of the window named by hdc.
 247  */
 248 static void
 249 get_window_size( HDC hdc, GLuint *width, GLuint *height )
 250 {
 251    if (WindowFromDC( hdc )) {
 252       RECT rect;
 253
 254       GetClientRect( WindowFromDC( hdc ), &rect );
 255       *width = rect.right - rect.left;
 256       *height = rect.bottom - rect.top;
 257    }
 258    else {
 259       *width = GetDeviceCaps( hdc, HORZRES );
 260       *height = GetDeviceCaps( hdc, VERTRES );
 261    }
 262 }
 263
 264 UINT_PTR
 265 stw_get_current_context( void )
 266 {
 267    return current_hglrc;
 268 }
 269
 270 HDC
 271 stw_get_current_dc( void )
 272 {
 273     return current_hdc;
 274 }
 275
 276 BOOL
 277 stw_make_current(
 278    HDC hdc,
 279    UINT_PTR hglrc )
 280 {
 281    struct stw_context *ctx;
 282    GET_CURRENT_CONTEXT( glcurctx );
 283    struct stw_framebuffer *fb;
 284    GLuint width = 0;
 285    GLuint height = 0;
 286
 287    if (!stw_dev)
 288       return FALSE;
 289
 290    pipe_mutex_lock( stw_dev->mutex );
 291    ctx = stw_lookup_context( hglrc );
 292    pipe_mutex_unlock( stw_dev->mutex );
 293
 294    if (ctx == NULL)
 295       return FALSE;
 296
 297    current_hdc = hdc;
 298    current_hglrc = hglrc;
 299
 300    if (hdc == NULL || hglrc == 0) {
 301       st_make_current( NULL, NULL, NULL );
 302       return TRUE;
 303    }
 304
 305    /* Return if already current.
 306     */
 307    if (glcurctx != NULL) {
 308       struct stw_context *curctx = (struct stw_context *) glcurctx->DriverCtx;
 309
 310       if (curctx != NULL && curctx == ctx && ctx->hdc == hdc)
 311          return TRUE;
 312    }
 313
 314    fb = framebuffer_from_hdc( hdc );
 315
 316    if (hdc != NULL)
 317       get_window_size( hdc, &width, &height );
 318
 319    /* Lazy creation of framebuffers.
 320     */
 321    if (fb == NULL && ctx != NULL && hdc != NULL) {
 322       GLvisual *visual = &ctx->st->ctx->Visual;
 323
 324       fb = framebuffer_create( hdc, visual, width, height );
 325       if (fb == NULL)
 326          return FALSE;
 327
 328       fb->dib_hDC = CreateCompatibleDC( hdc );
 329       fb->hbmDIB = NULL;
 330       fb->pbPixels = NULL;
 331    }
 332
 333    if (ctx && fb) {
 334       st_make_current( ctx->st, fb->stfb, fb->stfb );
 335       framebuffer_resize( fb, width, height );
 336       ctx->hdc = hdc;
 337       ctx->st->pipe->priv = hdc;
 338    }
 339    else {
 340       /* Detach */
 341       st_make_current( NULL, NULL, NULL );
 342    }
 343
 344    return TRUE;
 345 }