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

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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 "stw_device.h"
  42 #include "gdi/gdi_sw_winsys.h"
  43
  44 #include "softpipe/sp_texture.h"
  45 #include "softpipe/sp_screen.h"
  46 #include "softpipe/sp_public.h"
  47
  48 #ifdef HAVE_LLVMPIPE
  49 #include "llvmpipe/lp_texture.h"
  50 #include "llvmpipe/lp_screen.h"
  51 #include "llvmpipe/lp_public.h"
  52 #endif
  53
  54
  55 static boolean use_llvmpipe = FALSE;
  56
  57
  58 static struct pipe_screen *
  59 gdi_screen_create(void)
  60 {
  61    const char *default_driver;
  62    const char *driver;
  63    struct pipe_screen *screen = NULL;
  64    struct sw_winsys *winsys;
  65
  66    winsys = gdi_create_sw_winsys();
  67    if(!winsys)
  68       goto no_winsys;
  69
  70 #ifdef HAVE_LLVMPIPE
  71    default_driver = "llvmpipe";
  72 #else
  73    default_driver = "softpipe";
  74 #endif
  75
  76    driver = debug_get_option("GALLIUM_DRIVER", default_driver);
  77
  78 #ifdef HAVE_LLVMPIPE
  79    if (strcmp(driver, "llvmpipe") == 0) {
  80       screen = llvmpipe_create_screen( winsys );
  81    }
  82 #else
  83    (void) driver;
  84 #endif
  85
  86    if (screen == NULL) {
  87       screen = softpipe_create_screen( winsys );
  88    } else {
  89       use_llvmpipe = TRUE;
  90    }
  91
  92    if(!screen)
  93       goto no_screen;
  94
  95    return screen;
  96
  97 no_screen:
  98    winsys->destroy(winsys);
  99 no_winsys:
 100    return NULL;
 101 }
 102
 103
 104 static void
 105 gdi_present(struct pipe_screen *screen,
 106             struct pipe_resource *res,
 107             HDC hDC)
 108 {
 109    /* This will fail if any interposing layer (trace, debug, etc) has
 110     * been introduced between the state-trackers and the pipe driver.
 111     *
 112     * Ideally this would get replaced with a call to
 113     * pipe_screen::flush_frontbuffer().
 114     *
 115     * Failing that, it may be necessary for intervening layers to wrap
 116     * other structs such as this stw_winsys as well...
 117     */
 118
 119    struct sw_winsys *winsys = NULL;
 120    struct sw_displaytarget *dt = NULL;
 121
 122 #ifdef HAVE_LLVMPIPE
 123    if (use_llvmpipe) {
 124       winsys = llvmpipe_screen(screen)->winsys;
 125       dt = llvmpipe_resource(res)->dt;
 126       gdi_sw_display(winsys, dt, hDC);
 127       return;
 128    }
 129 #endif
 130
 131    winsys = softpipe_screen(screen)->winsys,
 132    dt = softpipe_resource(res)->dt,
 133    gdi_sw_display(winsys, dt, hDC);
 134 }
 135
 136
 137 static const struct stw_winsys stw_winsys = {
 138    &gdi_screen_create,
 139    &gdi_present,
 140    NULL, /* get_adapter_luid */
 141    NULL, /* shared_surface_open */
 142    NULL, /* shared_surface_close */
 143    NULL  /* compose */
 144 };
 145
 146
 147 EXTERN_C BOOL WINAPI
 148 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
 149
 150
 151 BOOL WINAPI
 152 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 153 {
 154    switch (fdwReason) {
 155    case DLL_PROCESS_ATTACH:
 156       stw_init(&stw_winsys);
 157       stw_init_thread();
 158       break;
 159
 160    case DLL_THREAD_ATTACH:
 161       stw_init_thread();
 162       break;
 163
 164    case DLL_THREAD_DETACH:
 165       stw_cleanup_thread();
 166       break;
 167
 168    case DLL_PROCESS_DETACH:
 169       if (lpvReserved == NULL) {
 170          // We're being unloaded from the process.
 171          stw_cleanup_thread();
 172          stw_cleanup();
 173       } else {
 174          // Process itself is terminating, and all threads and modules are
 175          // being detached.
 176          //
 177          // The order threads (including llvmpipe rasterizer threads) are
 178          // destroyed can not be relied up, so it's not safe to cleanup.
 179          //
 180          // However global destructors (e.g., LLVM's) will still be called, and
 181          // if Microsoft OPENGL32.DLL's DllMain is called after us, it will
 182          // still try to invoke DrvDeleteContext to destroys all outstanding,
 183          // so set stw_dev to NULL to return immediately if that happens.
 184          stw_dev = NULL;
 185       }
 186       break;
 187    }
 188    return TRUE;
 189 }