src/gallium/targets/libgl-gdi/libgl_gdi.c

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   3  * Copyright 2009-2010 VMware, Inc.
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  11  * permit persons to whom the Software is furnished to do so, subject to
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  28
  29 /**
  30  * @file
  31  * Softpipe/LLVMpipe support.
  32  *
  33  * @author Jose Fonseca <jfonseca@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 #else
  82    (void) driver;
  83 #endif
  84
  85    if (screen == NULL) {
  86       screen = softpipe_create_screen( winsys );
  87    } else {
  88       use_llvmpipe = TRUE;
  89    }
  90
  91    if(!screen)
  92       goto no_screen;
  93
  94    return screen;
  95
  96 no_screen:
  97    winsys->destroy(winsys);
  98 no_winsys:
  99    return NULL;
 100 }
 101
 102
 103 static void
 104 gdi_present(struct pipe_screen *screen,
 105             struct pipe_resource *res,
 106             HDC hDC)
 107 {
 108    /* This will fail if any interposing layer (trace, debug, etc) has
 109     * been introduced between the state-trackers and the pipe driver.
 110     *
 111     * Ideally this would get replaced with a call to
 112     * pipe_screen::flush_frontbuffer().
 113     *
 114     * Failing that, it may be necessary for intervening layers to wrap
 115     * other structs such as this stw_winsys as well...
 116     */
 117
 118    struct sw_winsys *winsys = NULL;
 119    struct sw_displaytarget *dt = NULL;
 120
 121 #ifdef HAVE_LLVMPIPE
 122    if (use_llvmpipe) {
 123       winsys = llvmpipe_screen(screen)->winsys;
 124       dt = llvmpipe_resource(res)->dt;
 125       gdi_sw_display(winsys, dt, hDC);
 126       return;
 127    }
 128 #endif
 129
 130    winsys = softpipe_screen(screen)->winsys,
 131    dt = softpipe_resource(res)->dt,
 132    gdi_sw_display(winsys, dt, hDC);
 133 }
 134
 135
 136 static const struct stw_winsys stw_winsys = {
 137    &gdi_screen_create,
 138    &gdi_present,
 139    NULL, /* get_adapter_luid */
 140    NULL, /* shared_surface_open */
 141    NULL, /* shared_surface_close */
 142    NULL  /* compose */
 143 };
 144
 145
 146 BOOL WINAPI
 147 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
 148 {
 149    switch (fdwReason) {
 150    case DLL_PROCESS_ATTACH:
 151       stw_init(&stw_winsys);
 152       stw_init_thread();
 153       break;
 154
 155    case DLL_THREAD_ATTACH:
 156       stw_init_thread();
 157       break;
 158
 159    case DLL_THREAD_DETACH:
 160       stw_cleanup_thread();
 161       break;
 162
 163    case DLL_PROCESS_DETACH:
 164       if (lpReserved == NULL) {
 165          stw_cleanup_thread();
 166          stw_cleanup();
 167       }
 168       break;
 169    }
 170    return TRUE;
 171 }