228 lines
6.2 KiB
C
228 lines
6.2 KiB
C
/*
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* DIB driver OpenGL support
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*
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* Copyright 2012 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#if 0
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#pragma makedep unix
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#endif
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#include "config.h"
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#include "wine/port.h"
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "ntgdi_private.h"
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#include "dibdrv.h"
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#include "wine/wgl.h"
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#include "wine/wgl_driver.h"
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#ifdef SONAME_LIBOSMESA
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(dib);
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#define OSMESA_COLOR_INDEX GL_COLOR_INDEX
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#define OSMESA_RGBA GL_RGBA
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#define OSMESA_BGRA 0x1
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#define OSMESA_ARGB 0x2
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#define OSMESA_RGB GL_RGB
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#define OSMESA_BGR 0x4
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#define OSMESA_RGB_565 0x5
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#define OSMESA_ROW_LENGTH 0x10
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#define OSMESA_Y_UP 0x11
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typedef struct osmesa_context *OSMesaContext;
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struct wgl_context
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{
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OSMesaContext context;
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UINT format;
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};
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static struct opengl_funcs opengl_funcs;
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#define USE_GL_FUNC(name) #name,
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static const char *opengl_func_names[] = { ALL_WGL_FUNCS };
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#undef USE_GL_FUNC
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static OSMesaContext (*pOSMesaCreateContextExt)( GLenum format, GLint depthBits, GLint stencilBits,
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GLint accumBits, OSMesaContext sharelist );
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static void (*pOSMesaDestroyContext)( OSMesaContext ctx );
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static void * (*pOSMesaGetProcAddress)( const char *funcName );
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static GLboolean (*pOSMesaMakeCurrent)( OSMesaContext ctx, void *buffer, GLenum type,
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GLsizei width, GLsizei height );
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static void (*pOSMesaPixelStore)( GLint pname, GLint value );
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static BOOL init_opengl(void)
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{
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static BOOL init_done = FALSE;
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static void *osmesa_handle;
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unsigned int i;
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if (init_done) return (osmesa_handle != NULL);
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init_done = TRUE;
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osmesa_handle = dlopen( SONAME_LIBOSMESA, RTLD_NOW );
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if (osmesa_handle == NULL)
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{
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ERR( "Failed to load OSMesa: %s\n", dlerror() );
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return FALSE;
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}
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#define LOAD_FUNCPTR(f) do if (!(p##f = dlsym( osmesa_handle, #f ))) \
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{ \
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ERR( "%s not found in %s (%s), disabling.\n", #f, SONAME_LIBOSMESA, dlerror() ); \
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goto failed; \
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} while(0)
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LOAD_FUNCPTR(OSMesaCreateContextExt);
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LOAD_FUNCPTR(OSMesaDestroyContext);
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LOAD_FUNCPTR(OSMesaGetProcAddress);
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LOAD_FUNCPTR(OSMesaMakeCurrent);
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LOAD_FUNCPTR(OSMesaPixelStore);
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#undef LOAD_FUNCPTR
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for (i = 0; i < ARRAY_SIZE( opengl_func_names ); i++)
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{
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if (!(((void **)&opengl_funcs.gl)[i] = pOSMesaGetProcAddress( opengl_func_names[i] )))
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{
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ERR( "%s not found in %s, disabling.\n", opengl_func_names[i], SONAME_LIBOSMESA );
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goto failed;
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}
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}
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return TRUE;
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failed:
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dlclose( osmesa_handle );
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osmesa_handle = NULL;
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return FALSE;
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}
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/***********************************************************************
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* osmesa_get_gl_funcs
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*/
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static void CDECL osmesa_get_gl_funcs( struct opengl_funcs *funcs )
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{
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funcs->gl = opengl_funcs.gl;
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}
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/***********************************************************************
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* osmesa_create_context
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*/
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static struct wgl_context * CDECL osmesa_create_context( HDC hdc, const PIXELFORMATDESCRIPTOR *descr )
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{
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struct wgl_context *context;
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UINT gl_format;
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switch (descr->cColorBits)
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{
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case 32:
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if (descr->cRedShift == 8) gl_format = OSMESA_ARGB;
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else if (descr->cRedShift == 16) gl_format = OSMESA_BGRA;
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else gl_format = OSMESA_RGBA;
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break;
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case 24:
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gl_format = descr->cRedShift == 16 ? OSMESA_BGR : OSMESA_RGB;
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break;
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case 16:
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gl_format = OSMESA_RGB_565;
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break;
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default:
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return NULL;
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}
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if (!(context = malloc( sizeof( *context )))) return NULL;
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context->format = gl_format;
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if (!(context->context = pOSMesaCreateContextExt( gl_format, descr->cDepthBits, descr->cStencilBits,
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descr->cAccumBits, 0 )))
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{
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free( context );
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return NULL;
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}
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return context;
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}
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/***********************************************************************
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* osmesa_delete_context
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*/
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static BOOL CDECL osmesa_delete_context( struct wgl_context *context )
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{
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pOSMesaDestroyContext( context->context );
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free( context );
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return TRUE;
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}
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/***********************************************************************
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* osmesa_get_proc_address
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*/
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static PROC CDECL osmesa_get_proc_address( const char *proc )
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{
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return (PROC)pOSMesaGetProcAddress( proc );
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}
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/***********************************************************************
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* osmesa_make_current
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*/
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static BOOL CDECL osmesa_make_current( struct wgl_context *context, void *bits,
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int width, int height, int bpp, int stride )
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{
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BOOL ret;
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GLenum type;
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if (!context)
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{
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pOSMesaMakeCurrent( NULL, NULL, GL_UNSIGNED_BYTE, 0, 0 );
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return TRUE;
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}
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type = context->format == OSMESA_RGB_565 ? GL_UNSIGNED_SHORT_5_6_5 : GL_UNSIGNED_BYTE;
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ret = pOSMesaMakeCurrent( context->context, bits, type, width, height );
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if (ret)
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{
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pOSMesaPixelStore( OSMESA_ROW_LENGTH, abs( stride ) * 8 / bpp );
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pOSMesaPixelStore( OSMESA_Y_UP, 1 ); /* Windows seems to assume bottom-up */
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}
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return ret;
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}
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static const struct osmesa_funcs osmesa_funcs =
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{
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osmesa_get_gl_funcs,
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osmesa_create_context,
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osmesa_delete_context,
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osmesa_get_proc_address,
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osmesa_make_current
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};
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const struct osmesa_funcs *init_opengl_lib(void)
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{
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if (!init_opengl()) return NULL;
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return &osmesa_funcs;
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}
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#else /* SONAME_LIBOSMESA */
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const struct osmesa_funcs *init_opengl_lib(void)
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{
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return NULL;
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}
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#endif /* SONAME_LIBOSMESA */
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