st/egl: Move module loading code to targets.

Several changes are made.  libegl.a no longer defines _eglMain.  It
defines functions to create and destroy a _EGLDriver instead.  The
creation function is called by the targets.  It takes an egl_g3d_loader
as its argument.  The loader is defined by the targets and is in charge
of creating st_api and pipe_screen.  This allows us to move the module
loading code to targets.  Lastly, the modules are now loaded as the
respective contexts are created.

8 files changed, 343 insertions, 35 deletions

diff --git a/src/gallium/targets/egl/Makefile b/src/gallium/targets/egl/Makefile
index 364a31dc45..80f9c60559 100644
--- a/src/gallium/targets/egl/Makefile
+++ b/src/gallium/targets/egl/Makefile
@@ -15,6 +15,9 @@
 TOP = ../../../..
 include $(TOP)/configs/current
 
+ST_PREFIX := st_
+PIPE_PREFIX := egl_gallium_
+
 common_CPPFLAGS := \
 	-I$(TOP)/src/gallium/auxiliary \
 	-I$(TOP)/src/gallium/drivers \
@@ -30,7 +33,8 @@ common_LIBS := \
 # EGL driver
 egl_CPPFLAGS := \
 	-I$(TOP)/src/gallium/state_trackers/egl \
-	-I$(TOP)/src/egl/main
+	-I$(TOP)/src/egl/main \
+	-DST_PREFIX=\"$(ST_PREFIX)\"
 egl_SYS := -lm -ldl -lEGL
 egl_LIBS := \
 	$(TOP)/src/gallium/state_trackers/egl/libegl.a \
@@ -47,6 +51,22 @@ ifneq ($(findstring fbdev, $(EGL_PLATFORMS)),)
 egl_LIBS += $(TOP)/src/gallium/winsys/sw/fbdev/libfbdev.a
 endif
 
+# EGL_RENDERABLE_TYPE is a compile time attribute
+egl_CPPFLAGS += $(API_DEFINES)
+ifneq ($(filter $(GL_LIB), $(EGL_CLIENT_APIS)),)
+egl_CPPFLAGS += -DFEATURE_GL=1
+endif
+ifneq ($(filter $(GLESv1_CM_LIB), $(EGL_CLIENT_APIS)),)
+egl_CPPFLAGS += -DFEATURE_ES1=1
+endif
+ifneq ($(filter $(GLESv2_LIB), $(EGL_CLIENT_APIS)),)
+egl_CPPFLAGS += -DFEATURE_ES2=1
+endif
+ifneq ($(filter $(VG_LIB), $(EGL_CLIENT_APIS)),)
+egl_CPPFLAGS += -DFEATURE_VG=1
+endif
+egl_CPPFLAGS := $(sort $(egl_CPPFLAGS))
+
 # LLVM
 ifeq ($(MESA_LLVM),1)
 common_SYS += $(LLVM_LIBS)
@@ -136,10 +156,10 @@ ifneq ($(findstring svga,$(GALLIUM_WINSYS_DIRS)),)
 OUTPUTS += vmwgfx
 endif
 OUTPUTS += swrast
-OUTPUTS := $(addprefix egl_gallium_, $(OUTPUTS))
+OUTPUTS := $(addprefix $(PIPE_PREFIX), $(OUTPUTS))
 
 # state trackers
-OUTPUTS += $(addprefix st_, $(EGL_CLIENT_APIS))
+OUTPUTS += $(addprefix $(ST_PREFIX), $(EGL_CLIENT_APIS))
 
 OUTPUTS := $(addsuffix .so, $(OUTPUTS))
 OUTPUTS := $(addprefix $(OUTPUT_PATH)/, $(OUTPUTS))
@@ -148,7 +168,7 @@ default: $(OUTPUTS)
 
 define mklib-egl
 $(MKLIB) -o $(notdir $@) -noprefix -linker '$(CC)' -ldflags '$(LDFLAGS)' \
-	-install $(OUTPUT_PATH) $(MKLIB_OPTIONS) $< \
+	-install $(OUTPUT_PATH) $(MKLIB_OPTIONS) $< egl.o \
 	-Wl,--start-group $(common_LIBS) $(egl_LIBS) $($(1)_LIBS) -Wl,--end-group \
 	$(common_SYS) $(egl_SYS) $($(1)_SYS)
 endef
@@ -161,37 +181,40 @@ $(MKLIB) -o $(notdir $@) -noprefix -linker '$(CC)' -ldflags '$(LDFLAGS)' \
 endef
 
 # EGL drivers
-$(OUTPUT_PATH)/egl_gallium_i915.so: pipe_i915.o $(egl_LIBS) $(i915_LIBS)
+$(OUTPUT_PATH)/$(PIPE_PREFIX)i915.so: pipe_i915.o egl.o $(egl_LIBS) $(i915_LIBS)
 	$(call mklib-egl,i915)
 
-$(OUTPUT_PATH)/egl_gallium_i965.so: pipe_i965.o $(egl_LIBS) $(i965_LIBS)
+$(OUTPUT_PATH)/$(PIPE_PREFIX)i965.so: pipe_i965.o egl.o $(egl_LIBS) $(i965_LIBS)
 	$(call mklib-egl,i965)
 
-$(OUTPUT_PATH)/egl_gallium_nouveau.so: pipe_nouveau.o $(egl_LIBS) $(nouveau_LIBS)
+$(OUTPUT_PATH)/$(PIPE_PREFIX)nouveau.so: pipe_nouveau.o egl.o $(egl_LIBS) $(nouveau_LIBS)
 	$(call mklib-egl,nouveau)
 
-$(OUTPUT_PATH)/egl_gallium_radeon.so: pipe_radeon.o $(egl_LIBS) $(radeon_LIBS)
+$(OUTPUT_PATH)/$(PIPE_PREFIX)radeon.so: pipe_radeon.o egl.o $(egl_LIBS) $(radeon_LIBS)
 	$(call mklib-egl,radeon)
 
-$(OUTPUT_PATH)/egl_gallium_vmwgfx.so: pipe_vmwgfx.o $(egl_LIBS) $(vmwgfx_LIBS)
+$(OUTPUT_PATH)/$(PIPE_PREFIX)vmwgfx.so: pipe_vmwgfx.o egl.o $(egl_LIBS) $(vmwgfx_LIBS)
 	$(call mklib-egl,vmwgfx)
 
-$(OUTPUT_PATH)/egl_gallium_swrast.so: pipe_swrast.o $(egl_LIBS) $(swrast_LIBS)
+$(OUTPUT_PATH)/$(PIPE_PREFIX)swrast.so: pipe_swrast.o egl.o $(egl_LIBS) $(swrast_LIBS)
 	$(call mklib-egl,swrast)
 
 # state trackers
-$(OUTPUT_PATH)/st_$(GL_LIB).so: st_GL.o $(GL_LIBS)
+$(OUTPUT_PATH)/$(ST_PREFIX)$(GL_LIB).so: st_GL.o $(GL_LIBS)
 	$(call mklib,GL)
 
-$(OUTPUT_PATH)/st_$(GLESv1_CM_LIB).so: st_GLESv1_CM.o $(GLESv1_CM_LIBS)
+$(OUTPUT_PATH)/$(ST_PREFIX)$(GLESv1_CM_LIB).so: st_GLESv1_CM.o $(GLESv1_CM_LIBS)
 	$(call mklib,GLESv1_CM)
 
-$(OUTPUT_PATH)/st_$(GLESv2_LIB).so: st_GLESv2.o $(GLESv2_LIBS)
+$(OUTPUT_PATH)/$(ST_PREFIX)$(GLESv2_LIB).so: st_GLESv2.o $(GLESv2_LIBS)
 	$(call mklib,GLESv2)
 
-$(OUTPUT_PATH)/st_$(VG_LIB).so: st_OpenVG.o $(OpenVG_LIBS)
+$(OUTPUT_PATH)/$(ST_PREFIX)$(VG_LIB).so: st_OpenVG.o $(OpenVG_LIBS)
 	$(call mklib,OpenVG)
 
+egl.o: egl.c
+	$(CC) -c -o $@ $< $(common_CPPFLAGS) $(egl_CPPFLAGS) $(DEFINES) $(CFLAGS)
+
 pipe_%.o: pipe_%.c
 	$(CC) -c -o $@ $< $(common_CPPFLAGS) $($*_CPPFLAGS) $(DEFINES) $(CFLAGS)
 
diff --git a/src/gallium/targets/egl/SConscript b/src/gallium/targets/egl/SConscript
index c743c26cf6..f2bcb6e684 100644
--- a/src/gallium/targets/egl/SConscript
+++ b/src/gallium/targets/egl/SConscript
@@ -27,7 +27,7 @@ if env['platform'] == 'windows':
 
     egl_gallium_swrast = env.SharedLibrary(
         target ='egl_gallium_swrast',
-	source = 'pipe_swrast.c',
+	source = ['egl.c', 'pipe_swrast.c'],
         LIBS = st_egl_gdi + ws_gdi + drivers + gallium + egl + env['LIBS'],
     )
 
diff --git a/src/gallium/targets/egl/egl.c b/src/gallium/targets/egl/egl.c
new file mode 100644
index 0000000000..831adf7c76
--- /dev/null
+++ b/src/gallium/targets/egl/egl.c
@@ -0,0 +1,305 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.9
+ *
+ * Copyright (C) 2010 LunarG Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Chia-I Wu <olv@lunarg.com>
+ */
+
+#include "util/u_debug.h"
+#include "util/u_string.h"
+#include "util/u_memory.h"
+#include "util/u_dl.h"
+#include "egldriver.h"
+#include "egllog.h"
+
+#include "state_tracker/st_api.h"
+#include "softpipe/sp_public.h"
+#include "llvmpipe/lp_public.h"
+#include "target-helpers/wrap_screen.h"
+#include "common/egl_g3d_loader.h"
+#include "state_tracker/drm_driver.h"
+
+struct egl_g3d_loader egl_g3d_loader;
+
+static struct st_module {
+   boolean initialized;
+   const char *name;
+   struct util_dl_library *lib;
+   struct st_api *stapi;
+} st_modules[ST_API_COUNT];
+
+static EGLBoolean
+dlopen_st_module_cb(const char *dir, size_t len, void *callback_data)
+{
+   struct st_module *stmod =
+      (struct st_module *) callback_data;
+   char path[1024];
+   int ret;
+
+   if (len) {
+      ret = util_snprintf(path, sizeof(path),
+            "%.*s/" ST_PREFIX "%s" UTIL_DL_EXT, len, dir, stmod->name);
+   }
+   else {
+      ret = util_snprintf(path, sizeof(path),
+            ST_PREFIX "%s" UTIL_DL_EXT, stmod->name);
+   }
+
+   if (ret > 0 && ret < sizeof(path)) {
+      stmod->lib = util_dl_open(path);
+      if (stmod->lib)
+         _eglLog(_EGL_DEBUG, "loaded %s", path);
+   }
+
+   return !(stmod->lib);
+}
+
+static boolean
+load_st_module(struct st_module *stmod,
+                       const char *name, const char *procname)
+{
+   struct st_api *(*create_api)(void);
+
+   stmod->name = name;
+   if (stmod->name)
+      _eglSearchPathForEach(dlopen_st_module_cb, (void *) stmod);
+   else
+      stmod->lib = util_dl_open(NULL);
+
+   if (stmod->lib) {
+      create_api = (struct st_api *(*)(void))
+         util_dl_get_proc_address(stmod->lib, procname);
+      if (create_api)
+         stmod->stapi = create_api();
+
+      if (!stmod->stapi) {
+         util_dl_close(stmod->lib);
+         stmod->lib = NULL;
+      }
+   }
+
+   if (!stmod->stapi)
+      stmod->name = NULL;
+
+   return (stmod->stapi != NULL);
+}
+
+static struct st_api *
+get_st_api(enum st_api_type api)
+{
+   struct st_module *stmod = &st_modules[api];
+   const char *names[8], *symbol;
+   int i, count = 0;
+
+   if (stmod->initialized)
+      return stmod->stapi;
+
+   switch (api) {
+   case ST_API_OPENGL:
+      symbol = ST_CREATE_OPENGL_SYMBOL;
+      names[count++] = "GL";
+      break;
+   case ST_API_OPENGL_ES1:
+      symbol = ST_CREATE_OPENGL_ES1_SYMBOL;
+      names[count++] = "GLESv1_CM";
+      names[count++] = "GL";
+      break;
+   case ST_API_OPENGL_ES2:
+      symbol = ST_CREATE_OPENGL_ES2_SYMBOL;
+      names[count++] = "GLESv2";
+      names[count++] = "GL";
+      break;
+   case ST_API_OPENVG:
+      symbol = ST_CREATE_OPENVG_SYMBOL;
+      names[count++] = "OpenVG";
+      break;
+   default:
+      symbol = NULL;
+      assert(!"Unknown API Type\n");
+      break;
+   }
+
+   /* NULL means the process itself */
+   names[count++] = NULL;
+
+   for (i = 0; i < count; i++) {
+      if (load_st_module(stmod, names[i], symbol))
+         break;
+   }
+
+   if (!stmod->stapi) {
+      EGLint level = (egl_g3d_loader.api_mask & (1 << api)) ?
+         _EGL_WARNING : _EGL_DEBUG;
+      _eglLog(level, "unable to load " ST_PREFIX "%s" UTIL_DL_EXT, names[0]);
+   }
+
+   stmod->initialized = TRUE;
+
+   return stmod->stapi;
+}
+
+static struct st_api *
+guess_gl_api(void)
+{
+   struct st_api *stapi;
+   int gl_apis[] = {
+      ST_API_OPENGL,
+      ST_API_OPENGL_ES1,
+      ST_API_OPENGL_ES2,
+      -1
+   };
+   int i, api = -1;
+
+   /* determine the api from the loaded libraries */
+   for (i = 0; gl_apis[i] != -1; i++) {
+      if (st_modules[gl_apis[i]].stapi) {
+         api = gl_apis[i];
+         break;
+      }
+   }
+   /* determine the api from the linked libraries */
+   if (api == -1) {
+      struct util_dl_library *self = util_dl_open(NULL);
+
+      if (self) {
+         if (util_dl_get_proc_address(self, "glColor4d"))
+            api = ST_API_OPENGL;
+         else if (util_dl_get_proc_address(self, "glColor4x"))
+            api = ST_API_OPENGL_ES1;
+         else if (util_dl_get_proc_address(self, "glShaderBinary"))
+            api = ST_API_OPENGL_ES2;
+         util_dl_close(self);
+      }
+   }
+
+   stapi = (api != -1) ? get_st_api(api) : NULL;
+   if (!stapi) {
+      for (i = 0; gl_apis[i] != -1; i++) {
+         api = gl_apis[i];
+         stapi = get_st_api(api);
+         if (stapi)
+            break;
+      }
+   }
+
+   return stapi;
+}
+
+static struct pipe_screen *
+create_drm_screen(const char *name, int fd)
+{
+   return (driver_descriptor.driver_name && name &&
+           strcmp(driver_descriptor.driver_name, name) == 0) ?
+      driver_descriptor.create_screen(fd) : NULL;
+}
+
+static struct pipe_screen *
+create_sw_screen(struct sw_winsys *ws)
+{
+   struct pipe_screen *screen = NULL;
+
+#if defined(GALLIUM_LLVMPIPE)
+   if (!screen && !debug_get_bool_option("GALLIUM_NO_LLVM", FALSE))
+      screen = llvmpipe_create_screen(ws);
+#endif
+   if (!screen)
+      screen = softpipe_create_screen(ws);
+
+   return (screen) ? gallium_wrap_screen(screen) : NULL;
+}
+
+static const struct egl_g3d_loader *
+loader_init(void)
+{
+   uint api_mask = 0x0;
+
+   /* TODO detect at runtime? */
+#if FEATURE_GL
+   api_mask |= 1 << ST_API_OPENGL;
+#endif
+#if FEATURE_ES1
+   api_mask |= 1 << ST_API_OPENGL_ES1;
+#endif
+#if FEATURE_ES2
+   api_mask |= 1 << ST_API_OPENGL_ES2;
+#endif
+#if FEATURE_VG
+   api_mask |= 1 << ST_API_OPENVG;
+#endif
+
+   egl_g3d_loader.api_mask = api_mask;
+   egl_g3d_loader.get_st_api = get_st_api;
+   egl_g3d_loader.guess_gl_api = guess_gl_api;
+   egl_g3d_loader.create_drm_screen = create_drm_screen;
+   egl_g3d_loader.create_sw_screen = create_sw_screen;
+
+   return &egl_g3d_loader;
+}
+
+static void
+loader_fini(void)
+{
+   int i;
+
+   for (i = 0; i < ST_API_COUNT; i++) {
+      struct st_module *stmod = &st_modules[i];
+
+      if (stmod->stapi) {
+         stmod->stapi->destroy(stmod->stapi);
+         stmod->stapi = NULL;
+      }
+      if (stmod->lib) {
+         util_dl_close(stmod->lib);
+         stmod->lib = NULL;
+      }
+      stmod->name = NULL;
+      stmod->initialized = FALSE;
+   }
+}
+
+static void
+egl_g3d_unload(_EGLDriver *drv)
+{
+   egl_g3d_destroy_driver(drv);
+   loader_fini();
+}
+
+_EGLDriver *
+_eglMain(const char *args)
+{
+   const struct egl_g3d_loader *loader;
+   _EGLDriver *drv;
+
+   loader = loader_init();
+   drv = egl_g3d_create_driver(loader);
+   if (!drv) {
+      loader_fini();
+      return NULL;
+   }
+
+   drv->Name = "Gallium";
+   drv->Unload = egl_g3d_unload;
+
+   return drv;
+}
diff --git a/src/gallium/targets/egl/pipe_i965.c b/src/gallium/targets/egl/pipe_i965.c
index d19c83a47d..cf96214e83 100644
--- a/src/gallium/targets/egl/pipe_i965.c
+++ b/src/gallium/targets/egl/pipe_i965.c
@@ -28,7 +28,3 @@ create_screen(int fd)
 }
 
 DRM_DRIVER_DESCRIPTOR("i965", "i965", create_screen)
-
-/* A poor man's --whole-archive for EGL drivers */
-void *_eglMain(void *);
-void *_eglWholeArchive = (void *) _eglMain;
diff --git a/src/gallium/targets/egl/pipe_nouveau.c b/src/gallium/targets/egl/pipe_nouveau.c
index cf569ea62c..e725a4d9b7 100644
--- a/src/gallium/targets/egl/pipe_nouveau.c
+++ b/src/gallium/targets/egl/pipe_nouveau.c
@@ -18,7 +18,3 @@ create_screen(int fd)
 }
 
 DRM_DRIVER_DESCRIPTOR("nouveau", "nouveau", create_screen)
-
-/* A poor man's --whole-archive for EGL drivers */
-void *_eglMain(void *);
-void *_eglWholeArchive = (void *) _eglMain;
diff --git a/src/gallium/targets/egl/pipe_radeon.c b/src/gallium/targets/egl/pipe_radeon.c
index ce07327b8f..5a0a8dc573 100644
--- a/src/gallium/targets/egl/pipe_radeon.c
+++ b/src/gallium/targets/egl/pipe_radeon.c
@@ -24,7 +24,3 @@ create_screen(int fd)
 }
 
 DRM_DRIVER_DESCRIPTOR("radeon", "radeon", create_screen)
-
-/* A poor man's --whole-archive for EGL drivers */
-void *_eglMain(void *);
-void *_eglWholeArchive = (void *) _eglMain;
diff --git a/src/gallium/targets/egl/pipe_swrast.c b/src/gallium/targets/egl/pipe_swrast.c
index d8205c158e..1ad4e25a6e 100644
--- a/src/gallium/targets/egl/pipe_swrast.c
+++ b/src/gallium/targets/egl/pipe_swrast.c
@@ -2,7 +2,3 @@
 #include "state_tracker/drm_driver.h"
 
 DRM_DRIVER_DESCRIPTOR("swrast", NULL, NULL)
-
-/* A poor man's --whole-archive for EGL drivers */
-void *_eglMain(void *);
-void *_eglWholeArchive = (void *) _eglMain;
diff --git a/src/gallium/targets/egl/pipe_vmwgfx.c b/src/gallium/targets/egl/pipe_vmwgfx.c
index 4e9f51c5dc..15089d6db2 100644
--- a/src/gallium/targets/egl/pipe_vmwgfx.c
+++ b/src/gallium/targets/egl/pipe_vmwgfx.c
@@ -24,7 +24,3 @@ create_screen(int fd)
 }
 
 DRM_DRIVER_DESCRIPTOR("vmwgfx", "vmwgfx", create_screen)
-
-/* A poor man's --whole-archive for EGL drivers */
-void *_eglMain(void *);
-void *_eglWholeArchive = (void *) _eglMain;