src/gallium/winsys/gdi/gdi_llvmpipe_winsys.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
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  11  * permit persons to whom the Software is furnished to do so, subject to
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  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
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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_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    struct pipe_format_block block;
  54    unsigned width;
  55    unsigned height;
  56    unsigned stride;
  57
  58    unsigned size;
  59
  60    void *data;
  61
  62    BITMAPINFO bmi;
  63 };
  64
  65
  66 /** Cast wrapper */
  67 static INLINE struct gdi_llvmpipe_displaytarget *
  68 gdi_llvmpipe_displaytarget( struct llvmpipe_displaytarget *buf )
  69 {
  70    return (struct gdi_llvmpipe_displaytarget *)buf;
  71 }
  72
  73
  74 static boolean
  75 gdi_llvmpipe_is_displaytarget_format_supported( struct llvmpipe_winsys *ws,
  76                                                 enum pipe_format format )
  77 {
  78    switch(format) {
  79    case PIPE_FORMAT_X8R8G8B8_UNORM:
  80    case PIPE_FORMAT_A8R8G8B8_UNORM:
  81       return TRUE;
  82
  83    /* TODO: Support other formats possible with BMPs, as described in
  84     * http://msdn.microsoft.com/en-us/library/dd183376(VS.85).aspx */
  85
  86    default:
  87       return FALSE;
  88    }
  89 }
  90
  91
  92 static void *
  93 gdi_llvmpipe_displaytarget_map(struct llvmpipe_winsys *ws,
  94                                struct llvmpipe_displaytarget *dt,
  95                                unsigned flags )
  96 {
  97    struct gdi_llvmpipe_displaytarget *gdt = gdi_llvmpipe_displaytarget(dt);
  98
  99    return gdt->data;
 100 }
 101
 102
 103 static void
 104 gdi_llvmpipe_displaytarget_unmap(struct llvmpipe_winsys *ws,
 105                                  struct llvmpipe_displaytarget *dt )
 106 {
 107
 108 }
 109
 110
 111 static void
 112 gdi_llvmpipe_displaytarget_destroy(struct llvmpipe_winsys *winsys,
 113                                    struct llvmpipe_displaytarget *dt)
 114 {
 115    struct gdi_llvmpipe_displaytarget *gdt = gdi_llvmpipe_displaytarget(dt);
 116
 117    align_free(gdt->data);
 118    FREE(gdt);
 119 }
 120
 121
 122 /**
 123  * Round n up to next multiple.
 124  */
 125 static INLINE unsigned
 126 round_up(unsigned n, unsigned multiple)
 127 {
 128    return (n + multiple - 1) & ~(multiple - 1);
 129 }
 130
 131
 132 static struct llvmpipe_displaytarget *
 133 gdi_llvmpipe_displaytarget_create(struct llvmpipe_winsys *winsys,
 134                                   enum pipe_format format,
 135                                   unsigned width, unsigned height,
 136                                   unsigned alignment,
 137                                   unsigned *stride)
 138 {
 139    struct gdi_llvmpipe_displaytarget *gdt;
 140    unsigned cpp;
 141    unsigned bpp;
 142
 143    gdt = CALLOC_STRUCT(gdi_llvmpipe_displaytarget);
 144    if(!gdt)
 145       goto no_gdt;
 146
 147    gdt->format = format;
 148    gdt->width = width;
 149    gdt->height = height;
 150
 151    bpp = util_format_get_bits(format);
 152    cpp = util_format_get_size(format);
 153
 154    gdt->stride = round_up(width * cpp, alignment);
 155    gdt->size = gdt->stride * height;
 156
 157    gdt->data = align_malloc(gdt->size, alignment);
 158    if(!gdt->data)
 159       goto no_data;
 160
 161    gdt->bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 162    gdt->bmi.bmiHeader.biWidth = gdt->stride / cpp;
 163    gdt->bmi.bmiHeader.biHeight= -(long)height;
 164    gdt->bmi.bmiHeader.biPlanes = 1;
 165    gdt->bmi.bmiHeader.biBitCount = bpp;
 166    gdt->bmi.bmiHeader.biCompression = BI_RGB;
 167    gdt->bmi.bmiHeader.biSizeImage = 0;
 168    gdt->bmi.bmiHeader.biXPelsPerMeter = 0;
 169    gdt->bmi.bmiHeader.biYPelsPerMeter = 0;
 170    gdt->bmi.bmiHeader.biClrUsed = 0;
 171    gdt->bmi.bmiHeader.biClrImportant = 0;
 172
 173    *stride = gdt->stride;
 174    return (struct llvmpipe_displaytarget *)gdt;
 175
 176 no_data:
 177    FREE(gdt);
 178 no_gdt:
 179    return NULL;
 180 }
 181
 182
 183 static void
 184 gdi_llvmpipe_displaytarget_display(struct llvmpipe_winsys *winsys,
 185                                    struct llvmpipe_displaytarget *dt,
 186                                    void *context_private)
 187 {
 188    assert(0);
 189 }
 190
 191
 192 static void
 193 gdi_llvmpipe_destroy(struct llvmpipe_winsys *winsys)
 194 {
 195    FREE(winsys);
 196 }
 197
 198
 199 static struct pipe_screen *
 200 gdi_llvmpipe_screen_create(void)
 201 {
 202    static struct llvmpipe_winsys *winsys;
 203    struct pipe_screen *screen;
 204
 205    winsys = CALLOC_STRUCT(llvmpipe_winsys);
 206    if(!winsys)
 207       goto no_winsys;
 208
 209    winsys->destroy = gdi_llvmpipe_destroy;
 210    winsys->is_displaytarget_format_supported = gdi_llvmpipe_is_displaytarget_format_supported;
 211    winsys->displaytarget_create = gdi_llvmpipe_displaytarget_create;
 212    winsys->displaytarget_map = gdi_llvmpipe_displaytarget_map;
 213    winsys->displaytarget_unmap = gdi_llvmpipe_displaytarget_unmap;
 214    winsys->displaytarget_display = gdi_llvmpipe_displaytarget_display;
 215    winsys->displaytarget_destroy = gdi_llvmpipe_displaytarget_destroy;
 216
 217    screen = llvmpipe_create_screen(winsys);
 218    if(!screen)
 219       goto no_screen;
 220
 221    return screen;
 222
 223 no_screen:
 224    FREE(winsys);
 225 no_winsys:
 226    return NULL;
 227 }
 228
 229
 230 static struct pipe_context *
 231 gdi_llvmpipe_context_create(struct pipe_screen *screen)
 232 {
 233    return llvmpipe_create(screen);
 234 }
 235
 236
 237 static void
 238 gdi_llvmpipe_present(struct pipe_screen *screen,
 239                      struct pipe_surface *surface,
 240                      HDC hDC)
 241 {
 242     struct llvmpipe_texture *texture;
 243     struct gdi_llvmpipe_displaytarget *gdt;
 244
 245     texture = llvmpipe_texture(surface->texture);
 246     gdt = gdi_llvmpipe_displaytarget(texture->dt);
 247
 248     StretchDIBits(hDC,
 249                   0, 0, gdt->width, gdt->height,
 250                   0, 0, gdt->width, gdt->height,
 251                   gdt->data, &gdt->bmi, 0, SRCCOPY);
 252 }
 253
 254
 255 static const struct stw_winsys stw_winsys = {
 256    &gdi_llvmpipe_screen_create,
 257    &gdi_llvmpipe_context_create,
 258    &gdi_llvmpipe_present,
 259    NULL, /* get_adapter_luid */
 260    NULL, /* shared_surface_open */
 261    NULL, /* shared_surface_close */
 262    NULL  /* compose */
 263 };
 264
 265
 266 BOOL WINAPI
 267 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
 268 {
 269    switch (fdwReason) {
 270    case DLL_PROCESS_ATTACH:
 271       if (!stw_init(&stw_winsys)) {
 272          return FALSE;
 273       }
 274       return stw_init_thread();
 275
 276    case DLL_THREAD_ATTACH:
 277       return stw_init_thread();
 278
 279    case DLL_THREAD_DETACH:
 280       stw_cleanup_thread();
 281       break;
 282
 283    case DLL_PROCESS_DETACH:
 284       stw_cleanup_thread();
 285       stw_cleanup();
 286       break;
 287    }
 288    return TRUE;
 289 }