dlls/gdi32/dibdrv/opengl.c

   1 /*
   2  * DIB driver OpenGL support
   3  *
   4  * Copyright 2012 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include "gdi_private.h"
  25 #include "dibdrv.h"
  26
  27 #include "wine/library.h"
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(dib);
  31
  32 #ifdef SONAME_LIBOSMESA
  33
  34 #include "wine/wgl.h"
  35 #include "wine/wgl_driver.h"
  36
  37 #define OSMESA_COLOR_INDEX      GL_COLOR_INDEX
  38 #define OSMESA_RGBA             GL_RGBA
  39 #define OSMESA_BGRA             0x1
  40 #define OSMESA_ARGB             0x2
  41 #define OSMESA_RGB              GL_RGB
  42 #define OSMESA_BGR              0x4
  43 #define OSMESA_RGB_565          0x5
  44 #define OSMESA_ROW_LENGTH       0x10
  45 #define OSMESA_Y_UP             0x11
  46
  47 typedef struct osmesa_context *OSMesaContext;
  48
  49 extern BOOL WINAPI GdiSetPixelFormat( HDC hdc, INT fmt, const PIXELFORMATDESCRIPTOR *pfd );
  50
  51 struct wgl_context
  52 {
  53     OSMesaContext context;
  54     int           format;
  55 };
  56
  57 static struct opengl_funcs opengl_funcs;
  58
  59 #define USE_GL_FUNC(name) #name,
  60 static const char *opengl_func_names[] = { ALL_WGL_FUNCS };
  61 #undef USE_GL_FUNC
  62
  63 static OSMesaContext (*pOSMesaCreateContextExt)( GLenum format, GLint depthBits, GLint stencilBits,
  64                                                  GLint accumBits, OSMesaContext sharelist );
  65 static void (*pOSMesaDestroyContext)( OSMesaContext ctx );
  66 static void * (*pOSMesaGetProcAddress)( const char *funcName );
  67 static GLboolean (*pOSMesaMakeCurrent)( OSMesaContext ctx, void *buffer, GLenum type,
  68                                         GLsizei width, GLsizei height );
  69 static void (*pOSMesaPixelStore)( GLint pname, GLint value );
  70
  71 static const struct
  72 {
  73     UINT mesa;
  74     BYTE color_bits;
  75     BYTE red_bits, red_shift;
  76     BYTE green_bits, green_shift;
  77     BYTE blue_bits, blue_shift;
  78     BYTE alpha_bits, alpha_shift;
  79     BYTE accum_bits;
  80     BYTE depth_bits;
  81     BYTE stencil_bits;
  82 } pixel_formats[] =
  83 {
  84     { OSMESA_BGRA,     32,  8, 16, 8, 8,  8, 0,  8, 24,  16, 32, 8 },
  85     { OSMESA_BGRA,     32,  8, 16, 8, 8,  8, 0,  8, 24,  16, 16, 8 },
  86     { OSMESA_RGBA,     32,  8, 0,  8, 8,  8, 16, 8, 24,  16, 32, 8 },
  87     { OSMESA_RGBA,     32,  8, 0,  8, 8,  8, 16, 8, 24,  16, 16, 8 },
  88     { OSMESA_ARGB,     32,  8, 8,  8, 16, 8, 24, 8, 0,   16, 32, 8 },
  89     { OSMESA_ARGB,     32,  8, 8,  8, 16, 8, 24, 8, 0,   16, 16, 8 },
  90     { OSMESA_RGB,      24,  8, 0,  8, 8,  8, 16, 0, 0,   16, 32, 8 },
  91     { OSMESA_RGB,      24,  8, 0,  8, 8,  8, 16, 0, 0,   16, 16, 8 },
  92     { OSMESA_BGR,      24,  8, 16, 8, 8,  8, 0,  0, 0,   16, 32, 8 },
  93     { OSMESA_BGR,      24,  8, 16, 8, 8,  8, 0,  0, 0,   16, 16, 8 },
  94     { OSMESA_RGB_565,  16,  5, 0,  6, 5,  5, 11, 0, 0,   16, 32, 8 },
  95     { OSMESA_RGB_565,  16,  5, 0,  6, 5,  5, 11, 0, 0,   16, 16, 8 },
  96 };
  97 static const int nb_formats = sizeof(pixel_formats) / sizeof(pixel_formats[0]);
  98
  99 static BOOL init_opengl(void)
 100 {
 101     static BOOL init_done = FALSE;
 102     static void *osmesa_handle;
 103     char buffer[200];
 104     unsigned int i;
 105
 106     if (init_done) return (osmesa_handle != NULL);
 107     init_done = TRUE;
 108
 109     osmesa_handle = wine_dlopen( SONAME_LIBOSMESA, RTLD_NOW, buffer, sizeof(buffer) );
 110     if (osmesa_handle == NULL)
 111     {
 112         ERR( "Failed to load OSMesa: %s\n", buffer );
 113         return FALSE;
 114     }
 115
 116     for (i = 0; i < sizeof(opengl_func_names)/sizeof(opengl_func_names[0]); i++)
 117     {
 118         if (!(((void **)&opengl_funcs.gl)[i] = wine_dlsym( osmesa_handle, opengl_func_names[i], buffer, sizeof(buffer) )))
 119         {
 120             ERR( "%s not found in %s (%s), disabling.\n", opengl_func_names[i], SONAME_LIBOSMESA, buffer );
 121             goto failed;
 122         }
 123     }
 124 #define LOAD_FUNCPTR(f) do if (!(p##f = wine_dlsym( osmesa_handle, #f, buffer, sizeof(buffer) ))) \
 125     { \
 126         ERR( "%s not found in %s (%s), disabling.\n", #f, SONAME_LIBOSMESA, buffer ); \
 127         goto failed; \
 128     } while(0)
 129
 130     LOAD_FUNCPTR(OSMesaCreateContextExt);
 131     LOAD_FUNCPTR(OSMesaDestroyContext);
 132     LOAD_FUNCPTR(OSMesaGetProcAddress);
 133     LOAD_FUNCPTR(OSMesaMakeCurrent);
 134     LOAD_FUNCPTR(OSMesaPixelStore);
 135 #undef LOAD_FUNCPTR
 136
 137     return TRUE;
 138
 139 failed:
 140     wine_dlclose( osmesa_handle, NULL, 0 );
 141     osmesa_handle = NULL;
 142     return FALSE;
 143 }
 144
 145 /**********************************************************************
 146  *           dibdrv_wglDescribePixelFormat
 147  */
 148 static int dibdrv_wglDescribePixelFormat( HDC hdc, int fmt, UINT size, PIXELFORMATDESCRIPTOR *descr )
 149 {
 150     int ret = sizeof(pixel_formats) / sizeof(pixel_formats[0]);
 151
 152     if (fmt <= 0 || fmt > ret) return ret;
 153     if (size < sizeof(*descr)) return 0;
 154
 155     memset( descr, 0, sizeof(*descr) );
 156     descr->nSize            = sizeof(*descr);
 157     descr->nVersion         = 1;
 158     descr->dwFlags          = PFD_SUPPORT_GDI | PFD_SUPPORT_OPENGL | PFD_DRAW_TO_BITMAP | PFD_GENERIC_FORMAT;
 159     descr->iPixelType       = PFD_TYPE_RGBA;
 160     descr->cColorBits       = pixel_formats[fmt - 1].color_bits;
 161     descr->cRedBits         = pixel_formats[fmt - 1].red_bits;
 162     descr->cRedShift        = pixel_formats[fmt - 1].red_shift;
 163     descr->cGreenBits       = pixel_formats[fmt - 1].green_bits;
 164     descr->cGreenShift      = pixel_formats[fmt - 1].green_shift;
 165     descr->cBlueBits        = pixel_formats[fmt - 1].blue_bits;
 166     descr->cBlueShift       = pixel_formats[fmt - 1].blue_shift;
 167     descr->cAlphaBits       = pixel_formats[fmt - 1].alpha_bits;
 168     descr->cAlphaShift      = pixel_formats[fmt - 1].alpha_shift;
 169     descr->cAccumBits       = pixel_formats[fmt - 1].accum_bits;
 170     descr->cAccumRedBits    = pixel_formats[fmt - 1].accum_bits / 4;
 171     descr->cAccumGreenBits  = pixel_formats[fmt - 1].accum_bits / 4;
 172     descr->cAccumBlueBits   = pixel_formats[fmt - 1].accum_bits / 4;
 173     descr->cAccumAlphaBits  = pixel_formats[fmt - 1].accum_bits / 4;
 174     descr->cDepthBits       = pixel_formats[fmt - 1].depth_bits;
 175     descr->cStencilBits     = pixel_formats[fmt - 1].stencil_bits;
 176     descr->cAuxBuffers      = 0;
 177     descr->iLayerType       = PFD_MAIN_PLANE;
 178     return ret;
 179 }
 180
 181 /***********************************************************************
 182  *              dibdrv_wglCopyContext
 183  */
 184 static BOOL dibdrv_wglCopyContext( struct wgl_context *src, struct wgl_context *dst, UINT mask )
 185 {
 186     FIXME( "not supported yet\n" );
 187     return FALSE;
 188 }
 189
 190 /***********************************************************************
 191  *              dibdrv_wglCreateContext
 192  */
 193 static struct wgl_context *dibdrv_wglCreateContext( HDC hdc )
 194 {
 195     struct wgl_context *context;
 196
 197     if (!(context = HeapAlloc( GetProcessHeap(), 0, sizeof( *context )))) return NULL;
 198     context->format = GetPixelFormat( hdc );
 199     if (!context->format || context->format > nb_formats) context->format = 1;
 200
 201     if (!(context->context = pOSMesaCreateContextExt( pixel_formats[context->format - 1].mesa,
 202                                                       pixel_formats[context->format - 1].depth_bits,
 203                                                       pixel_formats[context->format - 1].stencil_bits,
 204                                                       pixel_formats[context->format - 1].accum_bits, 0 )))
 205     {
 206         HeapFree( GetProcessHeap(), 0, context );
 207         return NULL;
 208     }
 209     return context;
 210 }
 211
 212 /***********************************************************************
 213  *              dibdrv_wglDeleteContext
 214  */
 215 static void dibdrv_wglDeleteContext( struct wgl_context *context )
 216 {
 217     pOSMesaDestroyContext( context->context );
 218     HeapFree( GetProcessHeap(), 0, context );
 219 }
 220
 221 /***********************************************************************
 222  *              dibdrv_wglGetPixelFormat
 223  */
 224 static int dibdrv_wglGetPixelFormat( HDC hdc )
 225 {
 226     DC *dc = get_dc_ptr( hdc );
 227     int ret = 0;
 228
 229     if (dc)
 230     {
 231         ret = dc->pixel_format;
 232         release_dc_ptr( dc );
 233     }
 234     return ret;
 235 }
 236
 237 /***********************************************************************
 238  *              dibdrv_wglGetProcAddress
 239  */
 240 static PROC dibdrv_wglGetProcAddress( const char *proc )
 241 {
 242     if (!strncmp( proc, "wgl", 3 )) return NULL;
 243     return (PROC)pOSMesaGetProcAddress( proc );
 244 }
 245
 246 /***********************************************************************
 247  *              dibdrv_wglMakeCurrent
 248  */
 249 static BOOL dibdrv_wglMakeCurrent( HDC hdc, struct wgl_context *context )
 250 {
 251     HBITMAP bitmap;
 252     BITMAPOBJ *bmp;
 253     dib_info dib;
 254     BOOL ret = FALSE;
 255
 256     if (!context)
 257     {
 258         pOSMesaMakeCurrent( NULL, NULL, GL_UNSIGNED_BYTE, 0, 0 );
 259         return TRUE;
 260     }
 261
 262     if (GetPixelFormat( hdc ) != context->format)
 263         FIXME( "mismatched pixel formats %u/%u not supported yet\n",
 264                GetPixelFormat( hdc ), context->format );
 265
 266     bitmap = GetCurrentObject( hdc, OBJ_BITMAP );
 267     bmp = GDI_GetObjPtr( bitmap, OBJ_BITMAP );
 268     if (!bmp) return FALSE;
 269
 270     if (init_dib_info_from_bitmapobj( &dib, bmp ))
 271     {
 272         char *bits;
 273         int width = dib.rect.right - dib.rect.left;
 274         int height = dib.rect.bottom - dib.rect.top;
 275
 276         if (dib.stride < 0)
 277             bits = (char *)dib.bits.ptr + (dib.rect.bottom - 1) * dib.stride;
 278         else
 279             bits = (char *)dib.bits.ptr + dib.rect.top * dib.stride;
 280         bits += dib.rect.left * dib.bit_count / 8;
 281
 282         TRACE( "context %p bits %p size %ux%u\n", context, bits, width, height );
 283
 284         ret = pOSMesaMakeCurrent( context->context, bits, GL_UNSIGNED_BYTE, width, height );
 285         if (ret)
 286         {
 287             pOSMesaPixelStore( OSMESA_ROW_LENGTH, abs( dib.stride ) * 8 / dib.bit_count );
 288             pOSMesaPixelStore( OSMESA_Y_UP, 1 );  /* Windows seems to assume bottom-up */
 289         }
 290     }
 291     GDI_ReleaseObj( bitmap );
 292     return ret;
 293 }
 294
 295 /**********************************************************************
 296  *           dibdrv_wglSetPixelFormat
 297  */
 298 static BOOL dibdrv_wglSetPixelFormat( HDC hdc, int fmt, const PIXELFORMATDESCRIPTOR *descr )
 299 {
 300     if (fmt <= 0 || fmt > nb_formats) return FALSE;
 301     return GdiSetPixelFormat( hdc, fmt, descr );
 302 }
 303
 304 /***********************************************************************
 305  *              dibdrv_wglShareLists
 306  */
 307 static BOOL dibdrv_wglShareLists( struct wgl_context *org, struct wgl_context *dest )
 308 {
 309     FIXME( "not supported yet\n" );
 310     return FALSE;
 311 }
 312
 313 /***********************************************************************
 314  *              dibdrv_wglSwapBuffers
 315  */
 316 static BOOL dibdrv_wglSwapBuffers( HDC hdc )
 317 {
 318     return TRUE;
 319 }
 320
 321 static struct opengl_funcs opengl_funcs =
 322 {
 323     {
 324         dibdrv_wglCopyContext,        /* p_wglCopyContext */
 325         dibdrv_wglCreateContext,      /* p_wglCreateContext */
 326         dibdrv_wglDeleteContext,      /* p_wglDeleteContext */
 327         dibdrv_wglDescribePixelFormat,/* p_wglDescribePixelFormat */
 328         dibdrv_wglGetPixelFormat,     /* p_wglGetPixelFormat */
 329         dibdrv_wglGetProcAddress,     /* p_wglGetProcAddress */
 330         dibdrv_wglMakeCurrent,        /* p_wglMakeCurrent */
 331         dibdrv_wglSetPixelFormat,     /* p_wglSetPixelFormat */
 332         dibdrv_wglShareLists,         /* p_wglShareLists */
 333         dibdrv_wglSwapBuffers,        /* p_wglSwapBuffers */
 334     }
 335 };
 336
 337 /**********************************************************************
 338  *           dibdrv_wine_get_wgl_driver
 339  */
 340 struct opengl_funcs *dibdrv_wine_get_wgl_driver( PHYSDEV dev, UINT version )
 341 {
 342     if (version != WINE_WGL_DRIVER_VERSION)
 343     {
 344         ERR( "version mismatch, opengl32 wants %u but dibdrv has %u\n", version, WINE_WGL_DRIVER_VERSION );
 345         return NULL;
 346     }
 347
 348     if (!init_opengl()) return (void *)-1;
 349
 350     return &opengl_funcs;
 351 }
 352
 353 #else  /* SONAME_LIBOSMESA */
 354
 355 /**********************************************************************
 356  *           dibdrv_wine_get_wgl_driver
 357  */
 358 struct opengl_funcs *dibdrv_wine_get_wgl_driver( PHYSDEV dev, UINT version )
 359 {
 360     static int warned;
 361     if (!warned++) ERR( "OSMesa not compiled in, no OpenGL bitmap support\n" );
 362     return (void *)-1;
 363 }
 364
 365 #endif  /* SONAME_LIBOSMESA */