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/internal/p_winsys_screen.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 struct pipe_buffer *
 165 gdi_softpipe_surface_buffer_create(struct pipe_winsys *winsys,
 166                                    unsigned width, unsigned height,
 167                                    enum pipe_format format,
 168                                    unsigned usage,
 169                                    unsigned *stride)
 170 {
 171    const unsigned alignment = 64;
 172    struct pipe_format_block block;
 173    unsigned nblocksx, nblocksy;
 174
 175    pf_get_block(format, &block);
 176    nblocksx = pf_get_nblocksx(&block, width);
 177    nblocksy = pf_get_nblocksy(&block, height);
 178    *stride = round_up(nblocksx * block.size, alignment);
 179
 180    return winsys->buffer_create(winsys, alignment,
 181                                 usage,
 182                                 *stride * nblocksy);
 183 }
 184
 185
 186 static void
 187 gdi_softpipe_dummy_flush_frontbuffer(struct pipe_winsys *winsys,
 188                                      struct pipe_surface *surface,
 189                                      void *context_private)
 190 {
 191    assert(0);
 192 }
 193
 194
 195 static void
 196 gdi_softpipe_fence_reference(struct pipe_winsys *winsys,
 197                              struct pipe_fence_handle **ptr,
 198                              struct pipe_fence_handle *fence)
 199 {
 200 }
 201
 202
 203 static int
 204 gdi_softpipe_fence_signalled(struct pipe_winsys *winsys,
 205                              struct pipe_fence_handle *fence,
 206                              unsigned flag)
 207 {
 208    return 0;
 209 }
 210
 211
 212 static int
 213 gdi_softpipe_fence_finish(struct pipe_winsys *winsys,
 214                           struct pipe_fence_handle *fence,
 215                           unsigned flag)
 216 {
 217    return 0;
 218 }
 219
 220
 221 static void
 222 gdi_softpipe_destroy(struct pipe_winsys *winsys)
 223 {
 224    FREE(winsys);
 225 }
 226
 227
 228 static struct pipe_screen *
 229 gdi_softpipe_screen_create(void)
 230 {
 231    static struct pipe_winsys *winsys;
 232    struct pipe_screen *screen;
 233
 234    winsys = CALLOC_STRUCT(pipe_winsys);
 235    if(!winsys)
 236       return NULL;
 237
 238    winsys->destroy = gdi_softpipe_destroy;
 239
 240    winsys->buffer_create = gdi_softpipe_buffer_create;
 241    winsys->user_buffer_create = gdi_softpipe_user_buffer_create;
 242    winsys->buffer_map = gdi_softpipe_buffer_map;
 243    winsys->buffer_unmap = gdi_softpipe_buffer_unmap;
 244    winsys->buffer_destroy = gdi_softpipe_buffer_destroy;
 245
 246    winsys->surface_buffer_create = gdi_softpipe_surface_buffer_create;
 247
 248    winsys->fence_reference = gdi_softpipe_fence_reference;
 249    winsys->fence_signalled = gdi_softpipe_fence_signalled;
 250    winsys->fence_finish = gdi_softpipe_fence_finish;
 251
 252    winsys->flush_frontbuffer = gdi_softpipe_dummy_flush_frontbuffer;
 253    winsys->get_name = gdi_softpipe_get_name;
 254
 255    screen = softpipe_create_screen(winsys);
 256    if(!screen)
 257       gdi_softpipe_destroy(winsys);
 258
 259    return screen;
 260 }
 261
 262
 263 static struct pipe_context *
 264 gdi_softpipe_context_create(struct pipe_screen *screen)
 265 {
 266    return softpipe_create(screen, screen->winsys, NULL);
 267 }
 268
 269
 270 static void
 271 gdi_softpipe_flush_frontbuffer(struct pipe_screen *screen,
 272                                struct pipe_surface *surface,
 273                                HDC hDC)
 274 {
 275     struct gdi_softpipe_buffer *buffer;
 276     BITMAPINFO bmi;
 277
 278     buffer = gdi_softpipe_buffer(surface->buffer);
 279
 280     memset(&bmi, 0, sizeof(BITMAPINFO));
 281     bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 282     bmi.bmiHeader.biWidth = surface->stride / pf_get_size(surface->format);
 283     bmi.bmiHeader.biHeight= -(long)surface->height;
 284     bmi.bmiHeader.biPlanes = 1;
 285     bmi.bmiHeader.biBitCount = pf_get_bits(surface->format);
 286     bmi.bmiHeader.biCompression = BI_RGB;
 287     bmi.bmiHeader.biSizeImage = 0;
 288     bmi.bmiHeader.biXPelsPerMeter = 0;
 289     bmi.bmiHeader.biYPelsPerMeter = 0;
 290     bmi.bmiHeader.biClrUsed = 0;
 291     bmi.bmiHeader.biClrImportant = 0;
 292
 293     StretchDIBits(hDC,
 294                   0, 0, surface->width, surface->height,
 295                   0, 0, surface->width, surface->height,
 296                   buffer->data, &bmi, 0, SRCCOPY);
 297 }
 298
 299
 300 static const struct stw_winsys stw_winsys = {
 301    &gdi_softpipe_screen_create,
 302    &gdi_softpipe_context_create,
 303    &gdi_softpipe_flush_frontbuffer
 304 };
 305
 306
 307 BOOL WINAPI
 308 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
 309 {
 310    switch (fdwReason) {
 311    case DLL_PROCESS_ATTACH:
 312       return st_init(&stw_winsys);
 313
 314    case DLL_PROCESS_DETACH:
 315       st_cleanup();
 316       break;
 317    }
 318    return TRUE;
 319 }