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

   1 /**************************************************************************
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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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  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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  24  * of the Software.
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  27  **************************************************************************/
  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 #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_surface *surface,
 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(surface->texture)->dt;
 123       gdi_sw_display(winsys, dt, hDC);
 124       return;
 125    }
 126 #endif
 127
 128    winsys = softpipe_screen(screen)->winsys,
 129    dt = softpipe_resource(surface->texture)->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 }