Made sharing an example

.gitignore

@@ -58,6 +58,7 @@ examples/heightmap
 examples/offscreen
 examples/particles
 examples/splitview
+examples/sharing
 examples/simple
 examples/wave
 tests/*.app
@@ -74,7 +75,6 @@ tests/joysticks
 tests/monitors
 tests/msaa
 tests/reopen
-tests/sharing
 tests/tearing
 tests/threads
 tests/timeout

docs/context.dox

@@ -61,7 +61,7 @@ information.  The name and number of this chapter unfortunately varies between
 versions and APIs, but has at times been named _Shared Objects and Multiple
 Contexts_.
 
-GLFW comes with a barebones object sharing test program called `sharing`.
+GLFW comes with a barebones object sharing example program called `sharing`.
 
 
 @subsection context_offscreen Offscreen contexts

examples/CMakeLists.txt

@@ -35,6 +35,7 @@ add_executable(gears WIN32 MACOSX_BUNDLE gears.c ${ICON} ${GLAD})
 add_executable(heightmap WIN32 MACOSX_BUNDLE heightmap.c ${ICON} ${GLAD})
 add_executable(offscreen offscreen.c ${ICON} ${GLAD})
 add_executable(particles WIN32 MACOSX_BUNDLE particles.c ${ICON} ${TINYCTHREAD} ${GETOPT} ${GLAD})
+add_executable(sharing WIN32 MACOSX_BUNDLE sharing.c ${ICON} ${GLAD})
 add_executable(simple WIN32 MACOSX_BUNDLE simple.c ${ICON} ${GLAD})
 add_executable(splitview WIN32 MACOSX_BUNDLE splitview.c ${ICON} ${GLAD})
 add_executable(wave WIN32 MACOSX_BUNDLE wave.c ${ICON} ${GLAD})
@@ -44,7 +45,7 @@ if (RT_LIBRARY)
     target_link_libraries(particles "${RT_LIBRARY}")
 endif()
 
-set(WINDOWS_BINARIES boing gears heightmap particles simple splitview wave)
+set(WINDOWS_BINARIES boing gears heightmap particles sharing simple splitview wave)
 set(CONSOLE_BINARIES offscreen)
 
 set_target_properties(${WINDOWS_BINARIES} ${CONSOLE_BINARIES} PROPERTIES
@@ -61,6 +62,7 @@ if (APPLE)
     set_target_properties(gears PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Gears")
     set_target_properties(heightmap PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Heightmap")
     set_target_properties(particles PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Particles")
+    set_target_properties(sharing PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Sharing")
     set_target_properties(simple PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Simple")
     set_target_properties(splitview PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "SplitView")
     set_target_properties(wave PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Wave")

examples/sharing.c

@@ -1,5 +1,5 @@
 //========================================================================
-// Context sharing test program
+// Context sharing example
 // Copyright (c) Camilla Löwy <elmindreda@glfw.org>
 //
 // This software is provided 'as-is', without any express or implied
@@ -22,15 +22,10 @@
 //    distribution.
 //
 //========================================================================
-//
-// This program is used to test sharing of objects between contexts
-//
-//========================================================================
 
 #include <glad/glad.h>
 #include <GLFW/glfw3.h>
 
-#include <time.h>
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -71,17 +66,6 @@ static void error_callback(int error, const char* description)
     fprintf(stderr, "Error: %s\n", description);
 }
 
-void APIENTRY debug_callback(GLenum source,
-                             GLenum type,
-                             GLuint id,
-                             GLenum severity,
-                             GLsizei length,
-                             const GLchar* message,
-                             const void* user)
-{
-    fprintf(stderr, "Error: %s\n", message);
-}
-
 static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
 {
     if (action == GLFW_PRESS && key == GLFW_KEY_ESCAPE)
@@ -90,28 +74,15 @@ static void key_callback(GLFWwindow* window, int key, int scancode, int action,
 
 int main(int argc, char** argv)
 {
-    int ch;
     GLFWwindow* windows[2];
     GLuint texture, program, vertex_buffer;
     GLint mvp_location, vpos_location, color_location, texture_location;
 
-    srand((unsigned int) time(NULL));
-
     glfwSetErrorCallback(error_callback);
 
     if (!glfwInit())
         exit(EXIT_FAILURE);
 
-    while ((ch = getopt(argc, argv, "d")) != -1)
-    {
-        switch (ch)
-        {
-            case 'd':
-                glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GLFW_TRUE);
-                break;
-        }
-    }
-
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
 
@@ -134,12 +105,6 @@ int main(int argc, char** argv)
     // pointers should be re-usable between them
     gladLoadGLLoader((GLADloadproc) glfwGetProcAddress);
 
-    if (GLAD_GL_KHR_debug)
-    {
-        glDebugMessageCallback(debug_callback, NULL);
-        glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, NULL, GL_TRUE);
-    }
-
     // Create the OpenGL objects inside the first context, created above
     // All objects will be shared with the second context, created below
     {
@@ -150,6 +115,8 @@ int main(int argc, char** argv)
         glGenTextures(1, &texture);
         glBindTexture(GL_TEXTURE_2D, texture);
 
+        srand((unsigned int) glfwGetTimerValue());
+
         for (y = 0;  y < 16;  y++)
         {
             for (x = 0;  x < 16;  x++)
@@ -235,8 +202,8 @@ int main(int argc, char** argv)
         int i;
         const vec3 colors[2] =
         {
-            { 0.3f, 0.4f, 1.f },
+            { 0.8f, 0.4f, 1.f },
-            { 0.8f, 0.4f, 1.f }
+            { 0.3f, 0.4f, 1.f }
         };
 
         for (i = 0;  i < 2;  i++)

tests/CMakeLists.txt

@@ -32,7 +32,6 @@ add_executable(gamma WIN32 MACOSX_BUNDLE gamma.c ${GLAD})
 add_executable(icon WIN32 MACOSX_BUNDLE icon.c ${GLAD})
 add_executable(inputlag WIN32 MACOSX_BUNDLE inputlag.c ${GETOPT} ${GLAD})
 add_executable(joysticks WIN32 MACOSX_BUNDLE joysticks.c ${GLAD})
-add_executable(sharing WIN32 MACOSX_BUNDLE sharing.c ${GETOPT} ${GLAD})
 add_executable(tearing WIN32 MACOSX_BUNDLE tearing.c ${GETOPT} ${GLAD})
 add_executable(threads WIN32 MACOSX_BUNDLE threads.c ${TINYCTHREAD} ${GLAD})
 add_executable(timeout WIN32 MACOSX_BUNDLE timeout.c ${GLAD})
@@ -46,7 +45,7 @@ if (RT_LIBRARY)
     target_link_libraries(threads "${RT_LIBRARY}")
 endif()
 
-set(WINDOWS_BINARIES empty gamma icon inputlag joysticks sharing tearing threads
+set(WINDOWS_BINARIES empty gamma icon inputlag joysticks tearing threads
                      timeout title windows)
 set(CONSOLE_BINARIES clipboard events msaa glfwinfo iconify monitors reopen
                      cursor)
@@ -76,7 +75,6 @@ if (APPLE)
     set_target_properties(gamma PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Gamma")
     set_target_properties(inputlag PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Input Lag")
     set_target_properties(joysticks PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Joysticks")
-    set_target_properties(sharing PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Sharing")
     set_target_properties(tearing PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Tearing")
     set_target_properties(threads PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Threads")
     set_target_properties(timeout PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Timeout")