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      3  * Copyright 2009-2010 VMware, Inc.
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     28 
     29 /**
     30  * @file
     31  * Softpipe/LLVMpipe support.
     32  *
     33  * @author Jose Fonseca <jfonseca (at) vmware.com>
     34  */
     35 
     36 
     37 #include <windows.h>
     38 
     39 #include "util/u_debug.h"
     40 #include "stw_winsys.h"
     41 #include "gdi/gdi_sw_winsys.h"
     42 
     43 #include "softpipe/sp_texture.h"
     44 #include "softpipe/sp_screen.h"
     45 #include "softpipe/sp_public.h"
     46 
     47 #ifdef HAVE_LLVMPIPE
     48 #include "llvmpipe/lp_texture.h"
     49 #include "llvmpipe/lp_screen.h"
     50 #include "llvmpipe/lp_public.h"
     51 #endif
     52 
     53 
     54 static boolean use_llvmpipe = FALSE;
     55 
     56 
     57 static struct pipe_screen *
     58 gdi_screen_create(void)
     59 {
     60    const char *default_driver;
     61    const char *driver;
     62    struct pipe_screen *screen = NULL;
     63    struct sw_winsys *winsys;
     64 
     65    winsys = gdi_create_sw_winsys();
     66    if(!winsys)
     67       goto no_winsys;
     68 
     69 #ifdef HAVE_LLVMPIPE
     70    default_driver = "llvmpipe";
     71 #else
     72    default_driver = "softpipe";
     73 #endif
     74 
     75    driver = debug_get_option("GALLIUM_DRIVER", default_driver);
     76 
     77 #ifdef HAVE_LLVMPIPE
     78    if (strcmp(driver, "llvmpipe") == 0) {
     79       screen = llvmpipe_create_screen( winsys );
     80    }
     81 #endif
     82 
     83    if (screen == NULL) {
     84       screen = softpipe_create_screen( winsys );
     85    } else {
     86       use_llvmpipe = TRUE;
     87    }
     88 
     89    if(!screen)
     90       goto no_screen;
     91 
     92    return screen;
     93 
     94 no_screen:
     95    winsys->destroy(winsys);
     96 no_winsys:
     97    return NULL;
     98 }
     99 
    100 
    101 static void
    102 gdi_present(struct pipe_screen *screen,
    103             struct pipe_resource *res,
    104             HDC hDC)
    105 {
    106    /* This will fail if any interposing layer (trace, debug, etc) has
    107     * been introduced between the state-trackers and the pipe driver.
    108     *
    109     * Ideally this would get replaced with a call to
    110     * pipe_screen::flush_frontbuffer().
    111     *
    112     * Failing that, it may be necessary for intervening layers to wrap
    113     * other structs such as this stw_winsys as well...
    114     */
    115 
    116    struct sw_winsys *winsys = NULL;
    117    struct sw_displaytarget *dt = NULL;
    118 
    119 #ifdef HAVE_LLVMPIPE
    120    if (use_llvmpipe) {
    121       winsys = llvmpipe_screen(screen)->winsys;
    122       dt = llvmpipe_resource(res)->dt;
    123       gdi_sw_display(winsys, dt, hDC);
    124       return;
    125    }
    126 #endif
    127 
    128    winsys = softpipe_screen(screen)->winsys,
    129    dt = softpipe_resource(res)->dt,
    130    gdi_sw_display(winsys, dt, hDC);
    131 }
    132 
    133 
    134 static const struct stw_winsys stw_winsys = {
    135    &gdi_screen_create,
    136    &gdi_present,
    137    NULL, /* get_adapter_luid */
    138    NULL, /* shared_surface_open */
    139    NULL, /* shared_surface_close */
    140    NULL  /* compose */
    141 };
    142 
    143 
    144 BOOL WINAPI
    145 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
    146 {
    147    switch (fdwReason) {
    148    case DLL_PROCESS_ATTACH:
    149       stw_init(&stw_winsys);
    150       stw_init_thread();
    151       break;
    152 
    153    case DLL_THREAD_ATTACH:
    154       stw_init_thread();
    155       break;
    156 
    157    case DLL_THREAD_DETACH:
    158       stw_cleanup_thread();
    159       break;
    160 
    161    case DLL_PROCESS_DETACH:
    162       stw_cleanup_thread();
    163       stw_cleanup();
    164       break;
    165    }
    166    return TRUE;
    167 }
    168