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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  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 "util/u_inlines.h"
  42 #include "util/u_format.h"
  43 #include "util/u_math.h"
  44 #include "util/u_memory.h"
  45 #include "llvmpipe/lp_winsys.h"
  46 #include "llvmpipe/lp_texture.h"
  47 #include "stw_winsys.h"
  48
  49
  50 struct gdi_llvmpipe_displaytarget
  51 {
  52    enum pipe_format format;
  53    unsigned width;
  54    unsigned height;
  55    unsigned stride;
  56
  57    unsigned size;
  58
  59    void *data;
  60
  61    BITMAPINFO bmi;
  62 };
  63
  64
  65 /** Cast wrapper */
  66 static INLINE struct gdi_llvmpipe_displaytarget *
  67 gdi_llvmpipe_displaytarget( struct llvmpipe_displaytarget *buf )
  68 {
  69    return (struct gdi_llvmpipe_displaytarget *)buf;
  70 }
  71
  72
  73 static boolean
  74 gdi_llvmpipe_is_displaytarget_format_supported( struct llvmpipe_winsys *ws,
  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_llvmpipe_displaytarget_map(struct llvmpipe_winsys *ws,
  93                                struct llvmpipe_displaytarget *dt,
  94                                unsigned flags )
  95 {
  96    struct gdi_llvmpipe_displaytarget *gdt = gdi_llvmpipe_displaytarget(dt);
  97
  98    return gdt->data;
  99 }
 100
 101
 102 static void
 103 gdi_llvmpipe_displaytarget_unmap(struct llvmpipe_winsys *ws,
 104                                  struct llvmpipe_displaytarget *dt )
 105 {
 106
 107 }
 108
 109
 110 static void
 111 gdi_llvmpipe_displaytarget_destroy(struct llvmpipe_winsys *winsys,
 112                                    struct llvmpipe_displaytarget *dt)
 113 {
 114    struct gdi_llvmpipe_displaytarget *gdt = gdi_llvmpipe_displaytarget(dt);
 115
 116    align_free(gdt->data);
 117    FREE(gdt);
 118 }
 119
 120
 121 static struct llvmpipe_displaytarget *
 122 gdi_llvmpipe_displaytarget_create(struct llvmpipe_winsys *winsys,
 123                                   enum pipe_format format,
 124                                   unsigned width, unsigned height,
 125                                   unsigned alignment,
 126                                   unsigned *stride)
 127 {
 128    struct gdi_llvmpipe_displaytarget *gdt;
 129    unsigned cpp;
 130    unsigned bpp;
 131
 132    gdt = CALLOC_STRUCT(gdi_llvmpipe_displaytarget);
 133    if(!gdt)
 134       goto no_gdt;
 135
 136    gdt->format = format;
 137    gdt->width = width;
 138    gdt->height = height;
 139
 140    bpp = util_format_get_blocksizebits(format);
 141    cpp = util_format_get_blocksize(format);
 142
 143    gdt->stride = align(width * cpp, alignment);
 144    gdt->size = gdt->stride * height;
 145
 146    gdt->data = align_malloc(gdt->size, alignment);
 147    if(!gdt->data)
 148       goto no_data;
 149
 150    gdt->bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 151    gdt->bmi.bmiHeader.biWidth = gdt->stride / cpp;
 152    gdt->bmi.bmiHeader.biHeight= -(long)height;
 153    gdt->bmi.bmiHeader.biPlanes = 1;
 154    gdt->bmi.bmiHeader.biBitCount = bpp;
 155    gdt->bmi.bmiHeader.biCompression = BI_RGB;
 156    gdt->bmi.bmiHeader.biSizeImage = 0;
 157    gdt->bmi.bmiHeader.biXPelsPerMeter = 0;
 158    gdt->bmi.bmiHeader.biYPelsPerMeter = 0;
 159    gdt->bmi.bmiHeader.biClrUsed = 0;
 160    gdt->bmi.bmiHeader.biClrImportant = 0;
 161
 162    *stride = gdt->stride;
 163    return (struct llvmpipe_displaytarget *)gdt;
 164
 165 no_data:
 166    FREE(gdt);
 167 no_gdt:
 168    return NULL;
 169 }
 170
 171
 172 static void
 173 gdi_llvmpipe_displaytarget_display(struct llvmpipe_winsys *winsys,
 174                                    struct llvmpipe_displaytarget *dt,
 175                                    void *context_private)
 176 {
 177    assert(0);
 178 }
 179
 180
 181 static void
 182 gdi_llvmpipe_destroy(struct llvmpipe_winsys *winsys)
 183 {
 184    FREE(winsys);
 185 }
 186
 187
 188 static struct pipe_screen *
 189 gdi_llvmpipe_screen_create(void)
 190 {
 191    static struct llvmpipe_winsys *winsys;
 192    struct pipe_screen *screen;
 193
 194    winsys = CALLOC_STRUCT(llvmpipe_winsys);
 195    if(!winsys)
 196       goto no_winsys;
 197
 198    winsys->destroy = gdi_llvmpipe_destroy;
 199    winsys->is_displaytarget_format_supported = gdi_llvmpipe_is_displaytarget_format_supported;
 200    winsys->displaytarget_create = gdi_llvmpipe_displaytarget_create;
 201    winsys->displaytarget_map = gdi_llvmpipe_displaytarget_map;
 202    winsys->displaytarget_unmap = gdi_llvmpipe_displaytarget_unmap;
 203    winsys->displaytarget_display = gdi_llvmpipe_displaytarget_display;
 204    winsys->displaytarget_destroy = gdi_llvmpipe_displaytarget_destroy;
 205
 206    screen = llvmpipe_create_screen(winsys);
 207    if(!screen)
 208       goto no_screen;
 209
 210    return screen;
 211
 212 no_screen:
 213    FREE(winsys);
 214 no_winsys:
 215    return NULL;
 216 }
 217
 218
 219
 220
 221 static void
 222 gdi_llvmpipe_present(struct pipe_screen *screen,
 223                      struct pipe_surface *surface,
 224                      HDC hDC)
 225 {
 226     struct llvmpipe_texture *texture;
 227     struct gdi_llvmpipe_displaytarget *gdt;
 228
 229     texture = llvmpipe_texture(surface->texture);
 230     gdt = gdi_llvmpipe_displaytarget(texture->dt);
 231
 232     StretchDIBits(hDC,
 233                   0, 0, gdt->width, gdt->height,
 234                   0, 0, gdt->width, gdt->height,
 235                   gdt->data, &gdt->bmi, 0, SRCCOPY);
 236 }
 237
 238
 239 static const struct stw_winsys stw_winsys = {
 240    &gdi_llvmpipe_screen_create,
 241    &gdi_llvmpipe_present,
 242    NULL, /* get_adapter_luid */
 243    NULL, /* shared_surface_open */
 244    NULL, /* shared_surface_close */
 245    NULL  /* compose */
 246 };
 247
 248
 249 BOOL WINAPI
 250 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
 251 {
 252    switch (fdwReason) {
 253    case DLL_PROCESS_ATTACH:
 254       stw_init(&stw_winsys);
 255       stw_init_thread();
 256       break;
 257
 258    case DLL_THREAD_ATTACH:
 259       stw_init_thread();
 260       break;
 261
 262    case DLL_THREAD_DETACH:
 263       stw_cleanup_thread();
 264       break;
 265
 266    case DLL_PROCESS_DETACH:
 267       stw_cleanup_thread();
 268       stw_cleanup();
 269       break;
 270    }
 271    return TRUE;
 272 }