src/gallium/winsys/gdi/gdi_sw_winsys.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   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,
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  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
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  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  * GDI software rasterizer support.
  32  *
  33  * @author Jose Fonseca <jfonseca@vmware.com>
  34  */
  35
  36
  37 #include <windows.h>
  38
  39 #include "pipe/p_format.h"
  40 #include "pipe/p_context.h"
  41 #include "util/u_inlines.h"
  42 #include "util/u_format.h"
  43 #include "util/u_math.h"
  44 #include "util/u_memory.h"
  45 #include "state_tracker/sw_winsys.h"
  46 #include "gdi_sw_winsys.h"
  47
  48
  49 struct gdi_sw_displaytarget
  50 {
  51    enum pipe_format format;
  52    unsigned width;
  53    unsigned height;
  54    unsigned stride;
  55
  56    unsigned size;
  57
  58    void *data;
  59
  60    BITMAPINFO bmi;
  61 };
  62
  63
  64 /** Cast wrapper */
  65 static INLINE struct gdi_sw_displaytarget *
  66 gdi_sw_displaytarget( struct sw_displaytarget *buf )
  67 {
  68    return (struct gdi_sw_displaytarget *)buf;
  69 }
  70
  71
  72 static boolean
  73 gdi_sw_is_displaytarget_format_supported( struct sw_winsys *ws,
  74                                                 unsigned tex_usage,
  75                                                 enum pipe_format format )
  76 {
  77    switch(format) {
  78    case PIPE_FORMAT_B8G8R8X8_UNORM:
  79    case PIPE_FORMAT_B8G8R8A8_UNORM:
  80       return TRUE;
  81
  82    /* TODO: Support other formats possible with BMPs, as described in
  83     * http://msdn.microsoft.com/en-us/library/dd183376(VS.85).aspx */
  84
  85    default:
  86       return FALSE;
  87    }
  88 }
  89
  90
  91 static void *
  92 gdi_sw_displaytarget_map(struct sw_winsys *ws,
  93                                struct sw_displaytarget *dt,
  94                                unsigned flags )
  95 {
  96    struct gdi_sw_displaytarget *gdt = gdi_sw_displaytarget(dt);
  97
  98    return gdt->data;
  99 }
 100
 101
 102 static void
 103 gdi_sw_displaytarget_unmap(struct sw_winsys *ws,
 104                                  struct sw_displaytarget *dt )
 105 {
 106
 107 }
 108
 109
 110 static void
 111 gdi_sw_displaytarget_destroy(struct sw_winsys *winsys,
 112                                    struct sw_displaytarget *dt)
 113 {
 114    struct gdi_sw_displaytarget *gdt = gdi_sw_displaytarget(dt);
 115
 116    align_free(gdt->data);
 117    FREE(gdt);
 118 }
 119
 120
 121 static struct sw_displaytarget *
 122 gdi_sw_displaytarget_create(struct sw_winsys *winsys,
 123                                   unsigned tex_usage,
 124                                   enum pipe_format format,
 125                                   unsigned width, unsigned height,
 126                                   unsigned alignment,
 127                                   unsigned *stride)
 128 {
 129    struct gdi_sw_displaytarget *gdt;
 130    unsigned cpp;
 131    unsigned bpp;
 132
 133    gdt = CALLOC_STRUCT(gdi_sw_displaytarget);
 134    if(!gdt)
 135       goto no_gdt;
 136
 137    gdt->format = format;
 138    gdt->width = width;
 139    gdt->height = height;
 140
 141    bpp = util_format_get_blocksizebits(format);
 142    cpp = util_format_get_blocksize(format);
 143
 144    gdt->stride = align(width * cpp, alignment);
 145    gdt->size = gdt->stride * height;
 146
 147    gdt->data = align_malloc(gdt->size, alignment);
 148    if(!gdt->data)
 149       goto no_data;
 150
 151    gdt->bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 152    gdt->bmi.bmiHeader.biWidth = gdt->stride / cpp;
 153    gdt->bmi.bmiHeader.biHeight= -(long)height;
 154    gdt->bmi.bmiHeader.biPlanes = 1;
 155    gdt->bmi.bmiHeader.biBitCount = bpp;
 156    gdt->bmi.bmiHeader.biCompression = BI_RGB;
 157    gdt->bmi.bmiHeader.biSizeImage = 0;
 158    gdt->bmi.bmiHeader.biXPelsPerMeter = 0;
 159    gdt->bmi.bmiHeader.biYPelsPerMeter = 0;
 160    gdt->bmi.bmiHeader.biClrUsed = 0;
 161    gdt->bmi.bmiHeader.biClrImportant = 0;
 162
 163    *stride = gdt->stride;
 164    return (struct sw_displaytarget *)gdt;
 165
 166 no_data:
 167    FREE(gdt);
 168 no_gdt:
 169    return NULL;
 170 }
 171
 172
 173 static struct sw_displaytarget *
 174 gdi_sw_displaytarget_from_handle(struct sw_winsys *winsys,
 175                                  const struct pipe_texture *templet,
 176                                  struct winsys_handle *whandle,
 177                                  unsigned *stride)
 178 {
 179    assert(0);
 180    return NULL;
 181 }
 182
 183
 184 static boolean
 185 gdi_sw_displaytarget_get_handle(struct sw_winsys *winsys,
 186                                 struct sw_displaytarget *dt,
 187                                 struct winsys_handle *whandle)
 188 {
 189    assert(0);
 190    return FALSE;
 191 }
 192
 193
 194 void
 195 gdi_sw_display( struct sw_winsys *winsys,
 196                 struct sw_displaytarget *dt,
 197                 HDC hDC )
 198 {
 199     struct gdi_sw_displaytarget *gdt = gdi_sw_displaytarget(dt);
 200
 201     StretchDIBits(hDC,
 202                   0, 0, gdt->width, gdt->height,
 203                   0, 0, gdt->width, gdt->height,
 204                   gdt->data, &gdt->bmi, 0, SRCCOPY);
 205 }
 206
 207 static void
 208 gdi_sw_displaytarget_display(struct sw_winsys *winsys,
 209                              struct sw_displaytarget *dt,
 210                              void *context_private)
 211 {
 212     /* nasty:
 213      */
 214     HDC hDC = (HDC)context_private;
 215
 216     gdi_sw_display(winsys, dt, hDC);
 217 }
 218
 219
 220 static void
 221 gdi_sw_destroy(struct sw_winsys *winsys)
 222 {
 223    FREE(winsys);
 224 }
 225
 226 struct sw_winsys *
 227 gdi_create_sw_winsys(void)
 228 {
 229    static struct sw_winsys *winsys;
 230
 231    winsys = CALLOC_STRUCT(sw_winsys);
 232    if(!winsys)
 233       return NULL;
 234
 235    winsys->destroy = gdi_sw_destroy;
 236    winsys->is_displaytarget_format_supported = gdi_sw_is_displaytarget_format_supported;
 237    winsys->displaytarget_create = gdi_sw_displaytarget_create;
 238    winsys->displaytarget_from_handle = gdi_sw_displaytarget_from_handle;
 239    winsys->displaytarget_get_handle = gdi_sw_displaytarget_get_handle;
 240    winsys->displaytarget_map = gdi_sw_displaytarget_map;
 241    winsys->displaytarget_unmap = gdi_sw_displaytarget_unmap;
 242    winsys->displaytarget_display = gdi_sw_displaytarget_display;
 243    winsys->displaytarget_destroy = gdi_sw_displaytarget_destroy;
 244
 245    return winsys;
 246 }
 247