/*
 * Copyright © 2011 Intel Corporation
 *
 * 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 (including the next
 * paragraph) 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.
 */
#include <gtest/gtest.h>
#include <string.h>

extern "C" {
#include "glxclient.h"
#include "glx_error.h"
}

#include <xcb/glx.h>
#include "mock_xdisplay.h"
#include "fake_glx_screen.h"

static bool CreateContextAttribsARB_was_sent;
static xcb_glx_create_context_attribs_arb_request_t req;
static uint32_t sent_attribs[1024];
static uint32_t next_id;


struct glx_screen *psc;

extern "C" Bool
glx_context_init(struct glx_context *gc,
		 struct glx_screen *psc, struct glx_config *config)
{
   gc->majorOpcode = 123;
   gc->screen = psc->scr;
   gc->psc = psc;
   gc->config = config;
   gc->isDirect = GL_TRUE;
   gc->currentContextTag = -1;

   return GL_TRUE;
}

extern "C" struct glx_screen *
GetGLXScreenConfigs(Display * dpy, int scrn)
{
   (void) dpy;
   (void) scrn;
   return psc;
}

extern "C" uint32_t
xcb_generate_id(xcb_connection_t *c)
{
   (void) c;

   return next_id++;
}

extern "C" xcb_void_cookie_t
xcb_glx_create_context_attribs_arb_checked(xcb_connection_t *c,
					   xcb_glx_context_t context,
					   uint32_t fbconfig,
					   uint32_t screen,
					   uint32_t share_list,
					   uint8_t is_direct,
					   uint32_t num_attribs,
					   const uint32_t *attribs)
{
   (void) c;

   CreateContextAttribsARB_was_sent = true;
   req.context = context;
   req.fbconfig = fbconfig;
   req.screen = screen;
   req.share_list = share_list;
   req.is_direct = is_direct;
   req.num_attribs = num_attribs;

   if (num_attribs != 0 && attribs != NULL)
      memcpy(sent_attribs, attribs, num_attribs * 2 * sizeof(uint32_t));

   xcb_void_cookie_t cookie;
   cookie.sequence = 0xbadc0de;

   return cookie;
}

extern "C" xcb_generic_error_t *
xcb_request_check(xcb_connection_t *c, xcb_void_cookie_t cookie)
{
   return NULL;
}

extern "C" void
__glXSendErrorForXcb(Display * dpy, const xcb_generic_error_t *err)
{
}

extern "C" void
__glXSendError(Display * dpy, int_fast8_t errorCode, uint_fast32_t resourceID,
               uint_fast16_t minorCode, bool coreX11error)
{
}

class glXCreateContextAttribARB_test : public ::testing::Test {
public:
   virtual void SetUp();

   /**
    * Replace the existing screen with a direct-rendering screen
    */
   void use_direct_rendering_screen();

   mock_XDisplay *dpy;
   struct glx_config fbc;
};

void
glXCreateContextAttribARB_test::SetUp()
{
   CreateContextAttribsARB_was_sent = false;
   memset(&req, 0, sizeof(req));
   next_id = 99;
   fake_glx_context::contexts_allocated = 0;
   psc = new fake_glx_screen(NULL, 0, "");

   this->dpy = new mock_XDisplay(1);

   memset(&this->fbc, 0, sizeof(this->fbc));
   this->fbc.fbconfigID = 0xbeefcafe;
}

void
glXCreateContextAttribARB_test::use_direct_rendering_screen()
{
   struct glx_screen *direct_psc =
      new fake_glx_screen_direct(psc->display,
				 psc->scr,
				 psc->serverGLXexts);

   delete psc;
   psc = direct_psc;
}

/**
 * \name Verify detection of client-side errors
 */
/*@{*/
TEST_F(glXCreateContextAttribARB_test, NULL_display_returns_None)
{
   GLXContext ctx =
      glXCreateContextAttribsARB(NULL, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   EXPECT_EQ(None, ctx);
   EXPECT_EQ(0, fake_glx_context::contexts_allocated);
}

TEST_F(glXCreateContextAttribARB_test, NULL_fbconfig_returns_None)
{
   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, NULL, 0, False, NULL);

   EXPECT_EQ(None, ctx);
   EXPECT_EQ(0, fake_glx_context::contexts_allocated);
}

TEST_F(glXCreateContextAttribARB_test, NULL_screen_returns_None)
{
   delete psc;
   psc = NULL;

   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   EXPECT_EQ(None, ctx);
   EXPECT_EQ(0, fake_glx_context::contexts_allocated);
}
/*@}*/

/**
 * \name Verify that correct protocol bits are sent to the server.
 */
/*@{*/
TEST_F(glXCreateContextAttribARB_test, does_send_protocol)
{
   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      False, NULL);

   EXPECT_TRUE(CreateContextAttribsARB_was_sent);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_context)
{
   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      False, NULL);

   EXPECT_EQ(99u, req.context);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_fbconfig)
{
   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      False, NULL);

   EXPECT_EQ(0xbeefcafe, req.fbconfig);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_share_list)
{
   GLXContext share =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   ASSERT_NE((GLXContext) 0, share);

   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, share,
			      False, NULL);

   struct glx_context *glx_ctx = (struct glx_context *) share;
   EXPECT_EQ(glx_ctx->xid, req.share_list);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_is_direct_for_indirect_screen_and_direct_set_to_true)
{
   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      True, NULL);

   EXPECT_FALSE(req.is_direct);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_is_direct_for_indirect_screen_and_direct_set_to_false)
{
   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      False, NULL);

   EXPECT_FALSE(req.is_direct);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_is_direct_for_direct_screen_and_direct_set_to_true)
{
   this->use_direct_rendering_screen();

   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      True, NULL);

   EXPECT_TRUE(req.is_direct);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_is_direct_for_direct_screen_and_direct_set_to_false)
{
   this->use_direct_rendering_screen();

   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      False, NULL);

   EXPECT_FALSE(req.is_direct);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_screen)
{
   this->fbc.screen = 7;
   psc->scr = 7;

   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      False, NULL);

   EXPECT_EQ(7u, req.screen);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_num_attribs)
{
   /* Use zeros in the second half of each attribute pair to try and trick the
    * implementation into termiating the list early.
    *
    * Use non-zero in the second half of the last attribute pair to try and
    * trick the implementation into not terminating the list early enough.
    */
   static const int attribs[] = {
      1, 0,
      2, 0,
      3, 0,
      4, 0,
      0, 6,
      0, 0
   };

   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      False, attribs);

   EXPECT_EQ(4u, req.num_attribs);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_num_attribs_empty_list)
{
   static const int attribs[] = {
      0,
   };

   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      False, attribs);

   EXPECT_EQ(0u, req.num_attribs);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_num_attribs_NULL_list_pointer)
{
   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      False, NULL);

   EXPECT_EQ(0u, req.num_attribs);
}

TEST_F(glXCreateContextAttribARB_test, sent_correct_attrib_list)
{
   int attribs[] = {
      GLX_RENDER_TYPE, GLX_RGBA_TYPE,
      GLX_CONTEXT_MAJOR_VERSION_ARB, 1,
      GLX_CONTEXT_MINOR_VERSION_ARB, 2,
      0
   };

   glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
			      False, attribs);

   for (unsigned i = 0; i < 6; i++) {
      EXPECT_EQ((uint32_t) attribs[i], sent_attribs[i]);
   }
}
/*@}*/

/**
 * \name Verify details of the returned GLXContext
 */
/*@{*/
TEST_F(glXCreateContextAttribARB_test, correct_context)
{
   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   /* Since the server did not return an error, the GLXContext should not be
    * NULL.
    */
   EXPECT_NE((GLXContext)0, ctx);

   /* It shouldn't be the XID of the context either.
    */
   EXPECT_NE((GLXContext)99, ctx);
}

TEST_F(glXCreateContextAttribARB_test, correct_context_xid)
{
   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   /* Since the server did not return an error, the GLXContext should not be
    * NULL.
    */
   ASSERT_NE((GLXContext)0, ctx);

   struct glx_context *glx_ctx = (struct glx_context *) ctx;
   EXPECT_EQ(99u, glx_ctx->xid);
}

TEST_F(glXCreateContextAttribARB_test, correct_context_share_xid)
{
   GLXContext first =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   ASSERT_NE((GLXContext) 0, first);

   GLXContext second =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, first,
				 False, NULL);

   ASSERT_NE((GLXContext) 0, second);

   struct glx_context *share = (struct glx_context *) first;
   struct glx_context *ctx = (struct glx_context *) second;
   EXPECT_EQ(share->xid, ctx->share_xid);
}

TEST_F(glXCreateContextAttribARB_test, correct_context_isDirect_for_indirect_screen_and_direct_set_to_true)
{
   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 True, NULL);

   ASSERT_NE((GLXContext) 0, ctx);

   struct glx_context *gc = (struct glx_context *) ctx;

   EXPECT_FALSE(gc->isDirect);
}

TEST_F(glXCreateContextAttribARB_test, correct_context_isDirect_for_indirect_screen_and_direct_set_to_false)
{
   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   ASSERT_NE((GLXContext) 0, ctx);

   struct glx_context *gc = (struct glx_context *) ctx;

   EXPECT_FALSE(gc->isDirect);
}

TEST_F(glXCreateContextAttribARB_test, correct_context_isDirect_for_direct_screen_and_direct_set_to_true)
{
   this->use_direct_rendering_screen();

   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 True, NULL);

   ASSERT_NE((GLXContext) 0, ctx);

   struct glx_context *gc = (struct glx_context *) ctx;

   EXPECT_TRUE(gc->isDirect);
}

TEST_F(glXCreateContextAttribARB_test, correct_context_isDirect_for_direct_screen_and_direct_set_to_false)
{
   this->use_direct_rendering_screen();

   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   ASSERT_NE((GLXContext) 0, ctx);

   struct glx_context *gc = (struct glx_context *) ctx;

   EXPECT_FALSE(gc->isDirect);
}

TEST_F(glXCreateContextAttribARB_test, correct_indirect_context_client_state_private)
{
   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   ASSERT_NE((GLXContext) 0, ctx);

   struct glx_context *gc = (struct glx_context *) ctx;

   ASSERT_FALSE(gc->isDirect);
   EXPECT_EQ((struct __GLXattributeRec *) 0xcafebabe,
	     gc->client_state_private);
}

TEST_F(glXCreateContextAttribARB_test, correct_indirect_context_config)
{
   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   ASSERT_NE((GLXContext) 0, ctx);

   struct glx_context *gc = (struct glx_context *) ctx;

   EXPECT_EQ(&this->fbc, gc->config);
}

TEST_F(glXCreateContextAttribARB_test, correct_context_screen_number)
{
   this->fbc.screen = 7;
   psc->scr = 7;

   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   ASSERT_NE((GLXContext) 0, ctx);

   struct glx_context *gc = (struct glx_context *) ctx;

   EXPECT_EQ(7, gc->screen);
}

TEST_F(glXCreateContextAttribARB_test, correct_context_screen_pointer)
{
   GLXContext ctx =
      glXCreateContextAttribsARB(this->dpy, (GLXFBConfig) &this->fbc, 0,
				 False, NULL);

   ASSERT_NE((GLXContext) 0, ctx);

   struct glx_context *gc = (struct glx_context *) ctx;

   EXPECT_EQ(psc, gc->psc);
}
/*@}*/