src/gallium/winsys/gdi/gdi_softpipe_winsys.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Bismarck, ND., USA
   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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  18  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  *
  27  **************************************************************************/
  28
  29 /**
  30  * @file
  31  * Softpipe support.
  32  *
  33  * @author Keith Whitwell
  34  * @author Brian Paul
  35  * @author Jose Fonseca
  36  */
  37
  38
  39 #include <windows.h>
  40
  41 #include "pipe/p_winsys.h"
  42 #include "pipe/p_format.h"
  43 #include "pipe/p_context.h"
  44 #include "pipe/p_inlines.h"
  45 #include "util/u_math.h"
  46 #include "util/u_memory.h"
  47 #include "softpipe/sp_winsys.h"
  48 #include "stw_winsys.h"
  49
  50
  51 struct gdi_softpipe_buffer
  52 {
  53    struct pipe_buffer base;
  54    boolean userBuffer;  /** Is this a user-space buffer? */
  55    void *data;
  56    void *mapped;
  57 };
  58
  59
  60 /** Cast wrapper */
  61 static INLINE struct gdi_softpipe_buffer *
  62 gdi_softpipe_buffer( struct pipe_buffer *buf )
  63 {
  64    return (struct gdi_softpipe_buffer *)buf;
  65 }
  66
  67
  68 static void *
  69 gdi_softpipe_buffer_map(struct pipe_winsys *winsys,
  70                         struct pipe_buffer *buf,
  71                         unsigned flags)
  72 {
  73    struct gdi_softpipe_buffer *gdi_softpipe_buf = gdi_softpipe_buffer(buf);
  74    gdi_softpipe_buf->mapped = gdi_softpipe_buf->data;
  75    return gdi_softpipe_buf->mapped;
  76 }
  77
  78
  79 static void
  80 gdi_softpipe_buffer_unmap(struct pipe_winsys *winsys,
  81                           struct pipe_buffer *buf)
  82 {
  83    struct gdi_softpipe_buffer *gdi_softpipe_buf = gdi_softpipe_buffer(buf);
  84    gdi_softpipe_buf->mapped = NULL;
  85 }
  86
  87
  88 static void
  89 gdi_softpipe_buffer_destroy(struct pipe_winsys *winsys,
  90                             struct pipe_buffer *buf)
  91 {
  92    struct gdi_softpipe_buffer *oldBuf = gdi_softpipe_buffer(buf);
  93
  94    if (oldBuf->data) {
  95       if (!oldBuf->userBuffer)
  96          align_free(oldBuf->data);
  97
  98       oldBuf->data = NULL;
  99    }
 100
 101    FREE(oldBuf);
 102 }
 103
 104
 105 static const char *
 106 gdi_softpipe_get_name(struct pipe_winsys *winsys)
 107 {
 108    return "softpipe";
 109 }
 110
 111
 112 static struct pipe_buffer *
 113 gdi_softpipe_buffer_create(struct pipe_winsys *winsys,
 114                            unsigned alignment,
 115                            unsigned usage,
 116                            unsigned size)
 117 {
 118    struct gdi_softpipe_buffer *buffer = CALLOC_STRUCT(gdi_softpipe_buffer);
 119
 120    buffer->base.refcount = 1;
 121    buffer->base.alignment = alignment;
 122    buffer->base.usage = usage;
 123    buffer->base.size = size;
 124
 125    buffer->data = align_malloc(size, alignment);
 126
 127    return &buffer->base;
 128 }
 129
 130
 131 /**
 132  * Create buffer which wraps user-space data.
 133  */
 134 static struct pipe_buffer *
 135 gdi_softpipe_user_buffer_create(struct pipe_winsys *winsys,
 136                                void *ptr,
 137                                unsigned bytes)
 138 {
 139    struct gdi_softpipe_buffer *buffer;
 140
 141    buffer = CALLOC_STRUCT(gdi_softpipe_buffer);
 142    if(!buffer)
 143       return NULL;
 144
 145    buffer->base.refcount = 1;
 146    buffer->base.size = bytes;
 147    buffer->userBuffer = TRUE;
 148    buffer->data = ptr;
 149
 150    return &buffer->base;
 151 }
 152
 153
 154 /**
 155  * Round n up to next multiple.
 156  */
 157 static INLINE unsigned
 158 round_up(unsigned n, unsigned multiple)
 159 {
 160    return (n + multiple - 1) & ~(multiple - 1);
 161 }
 162
 163
 164 static int
 165 gdi_softpipe_surface_alloc_storage(struct pipe_winsys *winsys,
 166                                    struct pipe_surface *surf,
 167                                    unsigned width, unsigned height,
 168                                    enum pipe_format format,
 169                                    unsigned flags,
 170                                    unsigned tex_usage)
 171 {
 172    const unsigned alignment = 64;
 173
 174    surf->width = width;
 175    surf->height = height;
 176    surf->format = format;
 177    pf_get_block(format, &surf->block);
 178    surf->nblocksx = pf_get_nblocksx(&surf->block, width);
 179    surf->nblocksy = pf_get_nblocksy(&surf->block, height);
 180    surf->stride = round_up(surf->nblocksx * surf->block.size, alignment);
 181    surf->usage = flags;
 182
 183    assert(!surf->buffer);
 184    surf->buffer = winsys->buffer_create(winsys, alignment,
 185                                         PIPE_BUFFER_USAGE_PIXEL,
 186                                         surf->stride * surf->nblocksy);
 187    if(!surf->buffer)
 188       return -1;
 189
 190    return 0;
 191 }
 192
 193
 194 static struct pipe_surface *
 195 gdi_softpipe_surface_alloc(struct pipe_winsys *winsys)
 196 {
 197    struct pipe_surface *surface = CALLOC_STRUCT(pipe_surface);
 198
 199    assert(winsys);
 200
 201    surface->refcount = 1;
 202    surface->winsys = winsys;
 203
 204    return surface;
 205 }
 206
 207
 208 static void
 209 gdi_softpipe_surface_release(struct pipe_winsys *winsys,
 210                              struct pipe_surface **s)
 211 {
 212    struct pipe_surface *surf = *s;
 213    assert(!surf->texture);
 214    surf->refcount--;
 215    if (surf->refcount == 0) {
 216       if (surf->buffer)
 217         winsys_buffer_reference(winsys, &surf->buffer, NULL);
 218       free(surf);
 219    }
 220    *s = NULL;
 221 }
 222
 223
 224 static void
 225 gdi_softpipe_dummy_flush_frontbuffer(struct pipe_winsys *winsys,
 226                                      struct pipe_surface *surface,
 227                                      void *context_private)
 228 {
 229    assert(0);
 230 }
 231
 232
 233 static void
 234 gdi_softpipe_fence_reference(struct pipe_winsys *winsys,
 235                              struct pipe_fence_handle **ptr,
 236                              struct pipe_fence_handle *fence)
 237 {
 238 }
 239
 240
 241 static int
 242 gdi_softpipe_fence_signalled(struct pipe_winsys *winsys,
 243                              struct pipe_fence_handle *fence,
 244                              unsigned flag)
 245 {
 246    return 0;
 247 }
 248
 249
 250 static int
 251 gdi_softpipe_fence_finish(struct pipe_winsys *winsys,
 252                           struct pipe_fence_handle *fence,
 253                           unsigned flag)
 254 {
 255    return 0;
 256 }
 257
 258
 259 static void
 260 gdi_softpipe_destroy(struct pipe_winsys *winsys)
 261 {
 262    FREE(winsys);
 263 }
 264
 265
 266 static struct pipe_screen *
 267 gdi_softpipe_screen_create(void)
 268 {
 269    static struct pipe_winsys *winsys;
 270    struct pipe_screen *screen;
 271
 272    winsys = CALLOC_STRUCT(pipe_winsys);
 273    if(!winsys)
 274       return NULL;
 275
 276    winsys->destroy = gdi_softpipe_destroy;
 277
 278    winsys->buffer_create = gdi_softpipe_buffer_create;
 279    winsys->user_buffer_create = gdi_softpipe_user_buffer_create;
 280    winsys->buffer_map = gdi_softpipe_buffer_map;
 281    winsys->buffer_unmap = gdi_softpipe_buffer_unmap;
 282    winsys->buffer_destroy = gdi_softpipe_buffer_destroy;
 283
 284    winsys->surface_alloc = gdi_softpipe_surface_alloc;
 285    winsys->surface_alloc_storage = gdi_softpipe_surface_alloc_storage;
 286    winsys->surface_release = gdi_softpipe_surface_release;
 287
 288    winsys->fence_reference = gdi_softpipe_fence_reference;
 289    winsys->fence_signalled = gdi_softpipe_fence_signalled;
 290    winsys->fence_finish = gdi_softpipe_fence_finish;
 291
 292    winsys->flush_frontbuffer = gdi_softpipe_dummy_flush_frontbuffer;
 293    winsys->get_name = gdi_softpipe_get_name;
 294
 295    screen = softpipe_create_screen(winsys);
 296    if(!screen)
 297       gdi_softpipe_destroy(winsys);
 298
 299    return screen;
 300 }
 301
 302
 303 static struct pipe_context *
 304 gdi_softpipe_context_create(struct pipe_screen *screen)
 305 {
 306    return softpipe_create(screen, screen->winsys, NULL);
 307 }
 308
 309
 310 static void
 311 gdi_softpipe_flush_frontbuffer(struct pipe_winsys *winsys,
 312                                struct pipe_surface *surface,
 313                                HDC hDC)
 314 {
 315     struct gdi_softpipe_buffer *buffer;
 316     BITMAPINFO bmi;
 317
 318     buffer = gdi_softpipe_buffer(surface->buffer);
 319
 320     memset(&bmi, 0, sizeof(BITMAPINFO));
 321     bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 322     bmi.bmiHeader.biWidth = surface->stride / pf_get_size(surface->format);
 323     bmi.bmiHeader.biHeight= -(long)surface->height;
 324     bmi.bmiHeader.biPlanes = 1;
 325     bmi.bmiHeader.biBitCount = pf_get_bits(surface->format);
 326     bmi.bmiHeader.biCompression = BI_RGB;
 327     bmi.bmiHeader.biSizeImage = 0;
 328     bmi.bmiHeader.biXPelsPerMeter = 0;
 329     bmi.bmiHeader.biYPelsPerMeter = 0;
 330     bmi.bmiHeader.biClrUsed = 0;
 331     bmi.bmiHeader.biClrImportant = 0;
 332
 333     StretchDIBits(hDC,
 334                   0, 0, surface->width, surface->height,
 335                   0, 0, surface->width, surface->height,
 336                   buffer->data, &bmi, 0, SRCCOPY);
 337 }
 338
 339
 340 static const struct stw_winsys stw_winsys = {
 341    &gdi_softpipe_screen_create,
 342    &gdi_softpipe_context_create,
 343    &gdi_softpipe_flush_frontbuffer
 344 };
 345
 346
 347 BOOL WINAPI
 348 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
 349 {
 350    switch (fdwReason) {
 351    case DLL_PROCESS_ATTACH:
 352       return st_init(&stw_winsys);
 353
 354    case DLL_PROCESS_DETACH:
 355       st_cleanup();
 356       break;
 357    }
 358    return TRUE;
 359 }