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

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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@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 #ifdef HAVE_SWR
  55 #include "swr/swr_public.h"
  56 #endif
  57
  58 static boolean use_llvmpipe = FALSE;
  59 static boolean use_swr = FALSE;
  60
  61 static struct pipe_screen *
  62 gdi_screen_create(void)
  63 {
  64    const char *default_driver;
  65    const char *driver;
  66    struct pipe_screen *screen = NULL;
  67    struct sw_winsys *winsys;
  68
  69    winsys = gdi_create_sw_winsys();
  70    if(!winsys)
  71       goto no_winsys;
  72
  73 #ifdef HAVE_LLVMPIPE
  74    default_driver = "llvmpipe";
  75 #elif HAVE_SWR
  76    default_driver = "swr";
  77 #else
  78    default_driver = "softpipe";
  79 #endif
  80
  81    driver = debug_get_option("GALLIUM_DRIVER", default_driver);
  82
  83 #ifdef HAVE_LLVMPIPE
  84    if (strcmp(driver, "llvmpipe") == 0) {
  85       screen = llvmpipe_create_screen( winsys );
  86       if (screen)
  87          use_llvmpipe = TRUE;
  88    }
  89 #endif
  90 #ifdef HAVE_SWR
  91    if (strcmp(driver, "swr") == 0) {
  92       screen = swr_create_screen( winsys );
  93       if (screen)
  94          use_swr = TRUE;
  95    }
  96 #endif
  97    (void) driver;
  98
  99    if (screen == NULL) {
 100       screen = softpipe_create_screen( winsys );
 101    }
 102
 103    if(!screen)
 104       goto no_screen;
 105
 106    return screen;
 107
 108 no_screen:
 109    winsys->destroy(winsys);
 110 no_winsys:
 111    return NULL;
 112 }
 113
 114
 115 static void
 116 gdi_present(struct pipe_screen *screen,
 117             struct pipe_resource *res,
 118             HDC hDC)
 119 {
 120    /* This will fail if any interposing layer (trace, debug, etc) has
 121     * been introduced between the state-trackers and the pipe driver.
 122     *
 123     * Ideally this would get replaced with a call to
 124     * pipe_screen::flush_frontbuffer().
 125     *
 126     * Failing that, it may be necessary for intervening layers to wrap
 127     * other structs such as this stw_winsys as well...
 128     */
 129
 130    struct sw_winsys *winsys = NULL;
 131    struct sw_displaytarget *dt = NULL;
 132
 133 #ifdef HAVE_LLVMPIPE
 134    if (use_llvmpipe) {
 135       winsys = llvmpipe_screen(screen)->winsys;
 136       dt = llvmpipe_resource(res)->dt;
 137       gdi_sw_display(winsys, dt, hDC);
 138       return;
 139    }
 140 #endif
 141
 142 #ifdef HAVE_SWR
 143    if (use_swr) {
 144       swr_gdi_swap(screen, res, hDC);
 145       return;
 146    }
 147 #endif
 148
 149    winsys = softpipe_screen(screen)->winsys,
 150    dt = softpipe_resource(res)->dt,
 151    gdi_sw_display(winsys, dt, hDC);
 152 }
 153
 154
 155 static const struct stw_winsys stw_winsys = {
 156    &gdi_screen_create,
 157    &gdi_present,
 158    NULL, /* get_adapter_luid */
 159    NULL, /* shared_surface_open */
 160    NULL, /* shared_surface_close */
 161    NULL  /* compose */
 162 };
 163
 164
 165 EXTERN_C BOOL WINAPI
 166 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
 167
 168
 169 BOOL WINAPI
 170 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 171 {
 172    switch (fdwReason) {
 173    case DLL_PROCESS_ATTACH:
 174       stw_init(&stw_winsys);
 175       stw_init_thread();
 176       break;
 177
 178    case DLL_THREAD_ATTACH:
 179       stw_init_thread();
 180       break;
 181
 182    case DLL_THREAD_DETACH:
 183       stw_cleanup_thread();
 184       break;
 185
 186    case DLL_PROCESS_DETACH:
 187       if (lpvReserved == NULL) {
 188          // We're being unloaded from the process.
 189          stw_cleanup_thread();
 190          stw_cleanup();
 191       } else {
 192          // Process itself is terminating, and all threads and modules are
 193          // being detached.
 194          //
 195          // The order threads (including llvmpipe rasterizer threads) are
 196          // destroyed can not be relied up, so it's not safe to cleanup.
 197          //
 198          // However global destructors (e.g., LLVM's) will still be called, and
 199          // if Microsoft OPENGL32.DLL's DllMain is called after us, it will
 200          // still try to invoke DrvDeleteContext to destroys all outstanding,
 201          // so set stw_dev to NULL to return immediately if that happens.
 202          stw_dev = NULL;
 203       }
 204       break;
 205    }
 206    return TRUE;
 207 }