src/gallium/winsys/gdi/gdi_llvmpipe_winsys.c

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   3  * Copyright 2009 VMware, Inc.
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  24  * of the Software.
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  27  **************************************************************************/
  28
  29 /**
  30  * @file
  31  * LLVMpipe 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 "pipe/p_inlines.h"
  42 #include "util/u_math.h"
  43 #include "util/u_memory.h"
  44 #include "llvmpipe/lp_winsys.h"
  45 #include "llvmpipe/lp_texture.h"
  46 #include "stw_winsys.h"
  47
  48
  49 struct gdi_llvmpipe_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_llvmpipe_displaytarget *
  66 gdi_llvmpipe_displaytarget( struct llvmpipe_displaytarget *buf )
  67 {
  68    return (struct gdi_llvmpipe_displaytarget *)buf;
  69 }
  70
  71
  72 static boolean
  73 gdi_llvmpipe_is_displaytarget_format_supported( struct llvmpipe_winsys *ws,
  74                                                 enum pipe_format format )
  75 {
  76    switch(format) {
  77    case PIPE_FORMAT_X8R8G8B8_UNORM:
  78    case PIPE_FORMAT_A8R8G8B8_UNORM:
  79       return TRUE;
  80
  81    /* TODO: Support other formats possible with BMPs, as described in
  82     * http://msdn.microsoft.com/en-us/library/dd183376(VS.85).aspx */
  83
  84    default:
  85       return FALSE;
  86    }
  87 }
  88
  89
  90 static void *
  91 gdi_llvmpipe_displaytarget_map(struct llvmpipe_winsys *ws,
  92                                struct llvmpipe_displaytarget *dt,
  93                                unsigned flags )
  94 {
  95    struct gdi_llvmpipe_displaytarget *gdt = gdi_llvmpipe_displaytarget(dt);
  96
  97    return gdt->data;
  98 }
  99
 100
 101 static void
 102 gdi_llvmpipe_displaytarget_unmap(struct llvmpipe_winsys *ws,
 103                                  struct llvmpipe_displaytarget *dt )
 104 {
 105
 106 }
 107
 108
 109 static void
 110 gdi_llvmpipe_displaytarget_destroy(struct llvmpipe_winsys *winsys,
 111                                    struct llvmpipe_displaytarget *dt)
 112 {
 113    struct gdi_llvmpipe_displaytarget *gdt = gdi_llvmpipe_displaytarget(dt);
 114
 115    align_free(gdt->data);
 116    FREE(gdt);
 117 }
 118
 119
 120 static struct llvmpipe_displaytarget *
 121 gdi_llvmpipe_displaytarget_create(struct llvmpipe_winsys *winsys,
 122                                   enum pipe_format format,
 123                                   unsigned width, unsigned height,
 124                                   unsigned alignment,
 125                                   unsigned *stride)
 126 {
 127    struct gdi_llvmpipe_displaytarget *gdt;
 128    unsigned cpp;
 129    unsigned bpp;
 130
 131    gdt = CALLOC_STRUCT(gdi_llvmpipe_displaytarget);
 132    if(!gdt)
 133       goto no_gdt;
 134
 135    gdt->format = format;
 136    gdt->width = width;
 137    gdt->height = height;
 138
 139    bpp = pf_get_blocksizebits(format);
 140    cpp = pf_get_blocksize(format);
 141
 142    gdt->stride = align(width * cpp, alignment);
 143    gdt->size = gdt->stride * height;
 144
 145    gdt->data = align_malloc(gdt->size, alignment);
 146    if(!gdt->data)
 147       goto no_data;
 148
 149    gdt->bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 150    gdt->bmi.bmiHeader.biWidth = gdt->stride / cpp;
 151    gdt->bmi.bmiHeader.biHeight= -(long)height;
 152    gdt->bmi.bmiHeader.biPlanes = 1;
 153    gdt->bmi.bmiHeader.biBitCount = bpp;
 154    gdt->bmi.bmiHeader.biCompression = BI_RGB;
 155    gdt->bmi.bmiHeader.biSizeImage = 0;
 156    gdt->bmi.bmiHeader.biXPelsPerMeter = 0;
 157    gdt->bmi.bmiHeader.biYPelsPerMeter = 0;
 158    gdt->bmi.bmiHeader.biClrUsed = 0;
 159    gdt->bmi.bmiHeader.biClrImportant = 0;
 160
 161    *stride = gdt->stride;
 162    return (struct llvmpipe_displaytarget *)gdt;
 163
 164 no_data:
 165    FREE(gdt);
 166 no_gdt:
 167    return NULL;
 168 }
 169
 170
 171 static void
 172 gdi_llvmpipe_displaytarget_display(struct llvmpipe_winsys *winsys,
 173                                    struct llvmpipe_displaytarget *dt,
 174                                    void *context_private)
 175 {
 176    assert(0);
 177 }
 178
 179
 180 static void
 181 gdi_llvmpipe_destroy(struct llvmpipe_winsys *winsys)
 182 {
 183    FREE(winsys);
 184 }
 185
 186
 187 static struct pipe_screen *
 188 gdi_llvmpipe_screen_create(void)
 189 {
 190    static struct llvmpipe_winsys *winsys;
 191    struct pipe_screen *screen;
 192
 193    winsys = CALLOC_STRUCT(llvmpipe_winsys);
 194    if(!winsys)
 195       goto no_winsys;
 196
 197    winsys->destroy = gdi_llvmpipe_destroy;
 198    winsys->is_displaytarget_format_supported = gdi_llvmpipe_is_displaytarget_format_supported;
 199    winsys->displaytarget_create = gdi_llvmpipe_displaytarget_create;
 200    winsys->displaytarget_map = gdi_llvmpipe_displaytarget_map;
 201    winsys->displaytarget_unmap = gdi_llvmpipe_displaytarget_unmap;
 202    winsys->displaytarget_display = gdi_llvmpipe_displaytarget_display;
 203    winsys->displaytarget_destroy = gdi_llvmpipe_displaytarget_destroy;
 204
 205    screen = llvmpipe_create_screen(winsys);
 206    if(!screen)
 207       goto no_screen;
 208
 209    return screen;
 210
 211 no_screen:
 212    FREE(winsys);
 213 no_winsys:
 214    return NULL;
 215 }
 216
 217
 218 static struct pipe_context *
 219 gdi_llvmpipe_context_create(struct pipe_screen *screen)
 220 {
 221    return llvmpipe_create(screen);
 222 }
 223
 224
 225 static void
 226 gdi_llvmpipe_present(struct pipe_screen *screen,
 227                      struct pipe_surface *surface,
 228                      HDC hDC)
 229 {
 230     struct llvmpipe_texture *texture;
 231     struct gdi_llvmpipe_displaytarget *gdt;
 232
 233     texture = llvmpipe_texture(surface->texture);
 234     gdt = gdi_llvmpipe_displaytarget(texture->dt);
 235
 236     StretchDIBits(hDC,
 237                   0, 0, gdt->width, gdt->height,
 238                   0, 0, gdt->width, gdt->height,
 239                   gdt->data, &gdt->bmi, 0, SRCCOPY);
 240 }
 241
 242
 243 static const struct stw_winsys stw_winsys = {
 244    &gdi_llvmpipe_screen_create,
 245    &gdi_llvmpipe_context_create,
 246    &gdi_llvmpipe_present,
 247    NULL, /* get_adapter_luid */
 248    NULL, /* shared_surface_open */
 249    NULL, /* shared_surface_close */
 250    NULL  /* compose */
 251 };
 252
 253
 254 BOOL WINAPI
 255 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
 256 {
 257    switch (fdwReason) {
 258    case DLL_PROCESS_ATTACH:
 259       if (!stw_init(&stw_winsys)) {
 260          return FALSE;
 261       }
 262       return stw_init_thread();
 263
 264    case DLL_THREAD_ATTACH:
 265       return stw_init_thread();
 266
 267    case DLL_THREAD_DETACH:
 268       stw_cleanup_thread();
 269       break;
 270
 271    case DLL_PROCESS_DETACH:
 272       stw_cleanup_thread();
 273       stw_cleanup();
 274       break;
 275    }
 276    return TRUE;
 277 }