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
  37 #ifdef DEBUG
  38 #include "trace/tr_screen.h"
  39 #include "trace/tr_context.h"
  40 #endif
  41
  42 #include "shared/stw_device.h"
  43 #include "shared/stw_winsys.h"
  44 #include "shared/stw_framebuffer.h"
  45 #include "shared/stw_pixelformat.h"
  46 #include "stw_public.h"
  47 #include "stw_context.h"
  48 #include "stw_tls.h"
  49
  50 BOOL
  51 stw_copy_context(
  52    UINT_PTR hglrcSrc,
  53    UINT_PTR hglrcDst,
  54    UINT mask )
  55 {
  56    struct stw_context *src;
  57    struct stw_context *dst;
  58    BOOL ret = FALSE;
  59
  60    pipe_mutex_lock( stw_dev->mutex );
  61
  62    src = stw_lookup_context_locked( hglrcSrc );
  63    dst = stw_lookup_context_locked( hglrcDst );
  64
  65    if (src && dst) {
  66       /* FIXME */
  67       (void) src;
  68       (void) dst;
  69       (void) mask;
  70    }
  71
  72    pipe_mutex_unlock( stw_dev->mutex );
  73
  74    return ret;
  75 }
  76
  77 UINT_PTR
  78 stw_create_layer_context(
  79    HDC hdc,
  80    int iLayerPlane )
  81 {
  82    uint pfi;
  83    const struct stw_pixelformat_info *pf = NULL;
  84    struct stw_context *ctx = NULL;
  85    GLvisual *visual = NULL;
  86    struct pipe_screen *screen = NULL;
  87    struct pipe_context *pipe = NULL;
  88    UINT_PTR hglrc = 0;
  89
  90    if(!stw_dev)
  91       return 0;
  92
  93    if (iLayerPlane != 0)
  94       return 0;
  95
  96    pfi = stw_pixelformat_get( hdc );
  97    if (pfi == 0)
  98       return 0;
  99
 100    pf = stw_pixelformat_get_info( pfi - 1 );
 101
 102    ctx = CALLOC_STRUCT( stw_context );
 103    if (ctx == NULL)
 104       return 0;
 105
 106    ctx->hdc = hdc;
 107    ctx->color_bits = GetDeviceCaps( ctx->hdc, BITSPIXEL );
 108
 109    /* Create visual based on flags
 110     */
 111    visual = _mesa_create_visual(
 112       (pf->pfd.iPixelType == PFD_TYPE_RGBA) ? GL_TRUE : GL_FALSE,
 113       (pf->pfd.dwFlags & PFD_DOUBLEBUFFER) ? GL_TRUE : GL_FALSE,
 114       (pf->pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE,
 115       pf->pfd.cRedBits,
 116       pf->pfd.cGreenBits,
 117       pf->pfd.cBlueBits,
 118       pf->pfd.cAlphaBits,
 119       (pf->pfd.iPixelType == PFD_TYPE_COLORINDEX) ? pf->pfd.cColorBits : 0,
 120       pf->pfd.cDepthBits,
 121       pf->pfd.cStencilBits,
 122       pf->pfd.cAccumRedBits,
 123       pf->pfd.cAccumGreenBits,
 124       pf->pfd.cAccumBlueBits,
 125       pf->pfd.cAccumAlphaBits,
 126       pf->numSamples );
 127    if (visual == NULL)
 128       goto fail;
 129
 130    screen = stw_dev->screen;
 131
 132 #ifdef DEBUG
 133    /* Unwrap screen */
 134    if(stw_dev->trace_running)
 135       screen = trace_screen(screen)->screen;
 136 #endif
 137
 138    pipe = stw_dev->stw_winsys->create_context( screen );
 139    if (pipe == NULL)
 140       goto fail;
 141
 142 #ifdef DEBUG
 143    /* Wrap context */
 144    if(stw_dev->trace_running)
 145       pipe = trace_context_create(stw_dev->screen, pipe);
 146 #endif
 147
 148    assert(!pipe->priv);
 149    pipe->priv = hdc;
 150
 151    ctx->st = st_create_context( pipe, visual, NULL );
 152    if (ctx->st == NULL)
 153       goto fail;
 154
 155    ctx->st->ctx->DriverCtx = ctx;
 156
 157    pipe_mutex_lock( stw_dev->mutex );
 158    hglrc = handle_table_add(stw_dev->ctx_table, ctx);
 159    pipe_mutex_unlock( stw_dev->mutex );
 160
 161    /* Success?
 162     */
 163    if (hglrc != 0)
 164       return hglrc;
 165
 166 fail:
 167    if (visual)
 168       _mesa_destroy_visual( visual );
 169
 170    if (pipe)
 171       pipe->destroy( pipe );
 172
 173    FREE( ctx );
 174    return 0;
 175 }
 176
 177 BOOL
 178 stw_delete_context(
 179    UINT_PTR hglrc )
 180 {
 181    struct stw_context *ctx ;
 182    BOOL ret = FALSE;
 183
 184    if (!stw_dev)
 185       return FALSE;
 186
 187    pipe_mutex_lock( stw_dev->mutex );
 188    ctx = stw_lookup_context_locked(hglrc);
 189    handle_table_remove(stw_dev->ctx_table, hglrc);
 190    pipe_mutex_unlock( stw_dev->mutex );
 191
 192    if (ctx) {
 193       GLcontext *glctx = ctx->st->ctx;
 194       GET_CURRENT_CONTEXT( glcurctx );
 195       struct stw_framebuffer *fb;
 196
 197       /* Unbind current if deleting current context.
 198        */
 199       if (glcurctx == glctx)
 200          st_make_current( NULL, NULL, NULL );
 201
 202       fb = stw_framebuffer_from_hdc( ctx->hdc );
 203       if (fb)
 204          stw_framebuffer_destroy( fb );
 205
 206       if (WindowFromDC( ctx->hdc ) != NULL)
 207          ReleaseDC( WindowFromDC( ctx->hdc ), ctx->hdc );
 208
 209       st_destroy_context(ctx->st);
 210       FREE(ctx);
 211
 212       ret = TRUE;
 213    }
 214
 215    return ret;
 216 }
 217
 218 BOOL
 219 stw_release_context(
 220    UINT_PTR hglrc )
 221 {
 222    struct stw_context *ctx;
 223
 224    if (!stw_dev)
 225       return FALSE;
 226
 227    pipe_mutex_lock( stw_dev->mutex );
 228    ctx = stw_lookup_context_locked( hglrc );
 229    pipe_mutex_unlock( stw_dev->mutex );
 230
 231    if (!ctx)
 232       return FALSE;
 233
 234    /* The expectation is that ctx is the same context which is
 235     * current for this thread.  We should check that and return False
 236     * if not the case.
 237     */
 238    {
 239       GLcontext *glctx = ctx->st->ctx;
 240       GET_CURRENT_CONTEXT( glcurctx );
 241
 242       if (glcurctx != glctx)
 243          return FALSE;
 244    }
 245
 246    if (stw_make_current( NULL, 0 ) == FALSE)
 247       return FALSE;
 248
 249    return TRUE;
 250 }
 251
 252 /* Find the width and height of the window named by hdc.
 253  */
 254 static void
 255 stw_get_window_size( HDC hdc, GLuint *width, GLuint *height )
 256 {
 257    if (WindowFromDC( hdc )) {
 258       RECT rect;
 259
 260       GetClientRect( WindowFromDC( hdc ), &rect );
 261       *width = rect.right - rect.left;
 262       *height = rect.bottom - rect.top;
 263    }
 264    else {
 265       *width = GetDeviceCaps( hdc, HORZRES );
 266       *height = GetDeviceCaps( hdc, VERTRES );
 267    }
 268 }
 269
 270 UINT_PTR
 271 stw_get_current_context( void )
 272 {
 273    return stw_tls_get_data()->currentGLRC;
 274 }
 275
 276 HDC
 277 stw_get_current_dc( void )
 278 {
 279     return stw_tls_get_data()->currentDC;
 280 }
 281
 282 BOOL
 283 stw_make_current(
 284    HDC hdc,
 285    UINT_PTR hglrc )
 286 {
 287    struct stw_context *ctx;
 288    GET_CURRENT_CONTEXT( glcurctx );
 289    struct stw_framebuffer *fb;
 290    GLuint width = 0;
 291    GLuint height = 0;
 292    struct stw_context *curctx;
 293
 294    if (!stw_dev)
 295       return FALSE;
 296
 297    pipe_mutex_lock( stw_dev->mutex );
 298    ctx = stw_lookup_context_locked( hglrc );
 299    pipe_mutex_unlock( stw_dev->mutex );
 300
 301    stw_tls_get_data()->currentDC = hdc;
 302    stw_tls_get_data()->currentGLRC = hglrc;
 303
 304    if (glcurctx != NULL) {
 305       curctx = (struct stw_context *) glcurctx->DriverCtx;
 306
 307       if (curctx != ctx)
 308          st_flush(glcurctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 309    }
 310
 311    if (hdc == NULL || hglrc == 0) {
 312       st_make_current( NULL, NULL, NULL );
 313       return TRUE;
 314    }
 315
 316    /* Return if already current.
 317     */
 318    if (glcurctx != NULL) {
 319       if (curctx != NULL && curctx == ctx && ctx->hdc == hdc)
 320          return TRUE;
 321    }
 322
 323    fb = stw_framebuffer_from_hdc( hdc );
 324
 325    if (hdc != NULL)
 326       stw_get_window_size( hdc, &width, &height );
 327
 328    /* Lazy creation of stw_framebuffers.
 329     */
 330    if (fb == NULL && ctx != NULL && hdc != NULL) {
 331       GLvisual *visual = &ctx->st->ctx->Visual;
 332
 333       fb = stw_framebuffer_create( hdc, visual, width, height );
 334       if (fb == NULL)
 335          return FALSE;
 336    }
 337
 338    if (ctx && fb) {
 339       st_make_current( ctx->st, fb->stfb, fb->stfb );
 340       stw_framebuffer_resize( fb, width, height );
 341       ctx->hdc = hdc;
 342       ctx->st->pipe->priv = hdc;
 343    }
 344    else {
 345       /* Detach */
 346       st_make_current( NULL, NULL, NULL );
 347    }
 348
 349    return TRUE;
 350 }