add RSGL renderer, RGFW backend and GLFW backend

CMakeLists.txt

@@ -12,4 +12,7 @@ if(NOT MSVC)
   add_subdirectory("examples/clay-official-website")
   add_subdirectory("examples/introducing-clay-video-demo")
   add_subdirectory("examples/SDL2-video-demo")
+  add_subdirectory("examples/SDL2-video-demo")
+  add_subdirectory("examples/RSGL_rendering/GLFW_windowing")
+  add_subdirectory("examples/RSGL_rendering/RGFW_windowing")
 endif()

examples/RSGL_rendering/GLFW_windowing/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.10)
+
+project(GLFWExample)
+
+set(SRC main.c)
+
+# Set libraries and extensions based on OS
+if(WIN32)
+    set(LIBS -lglfw3 -lgdi32 -lopengl32)
+elseif(APPLE)
+    set(LIBS -lglfw -framework Cocoa -framework OpenGL -framework IOKit -framework CoreVideo)
+elseif(UNIX)
+    set(LIBS -lglfw -lGL -lm -ldl -lpthread)
+endif()
+
+# Include directories
+include_directories(${CMAKE_SOURCE_DIR})
+
+# Add executable
+add_executable(main${EXT} ${SRC})
+
+# Link libraries
+target_include_directories(main PRIVATE ../../../renderers/RSGL)
+target_include_directories(main PRIVATE ../../../)
+target_link_libraries(main${EXT} ${LIBS})

examples/RSGL_rendering/GLFW_windowing/clay_backend_glfw.c

@@ -0,0 +1,86 @@
+#include <GLFW/glfw3.h>
+
+#define GLFW_UNUSED(x) (void)(x);
+
+Clay_Vector2 GLFW_mousePosition;
+
+u32 GLFW_mouseLeft = 0;
+
+GLFWkeyfun GLFW_old_key = NULL; 
+GLFWcharfun GLFW_old_char = NULL;
+GLFWwindowsizefun GLFW_old_resize = NULL;
+GLFWmousebuttonfun GLFW_old_button = NULL;
+GLFWcursorposfun GLFW_old_cursor = NULL;
+GLFWscrollfun GLFW_old_scroll = NULL;
+
+
+void windowSizeCallback(GLFWwindow *window, int width, int height) {
+    GLFW_UNUSED(window)
+    Clay_SetLayoutDimensions((Clay_Dimensions) { (float)width, (float)height });
+
+	if (GLFW_old_resize != NULL)
+		GLFW_old_resize(window, width, height);
+}
+
+static void charCallback(GLFWwindow *window, unsigned int codepoint) {
+    GLFW_UNUSED(window)
+
+	if (GLFW_old_char != NULL)
+		GLFW_old_char(window, codepoint);
+}
+
+
+static void keyCallback(GLFWwindow* window, int key, int scancode, int action, int mods)
+{
+    GLFW_UNUSED(window)
+    GLFW_UNUSED(mods)
+    GLFW_UNUSED(scancode)
+
+
+	if (GLFW_old_key != NULL)
+		GLFW_old_key(window, key, scancode, action, mods);
+
+}
+
+static void mouseButtonCallback(GLFWwindow *window, int button, int action, int mods) {
+    GLFW_UNUSED(window)
+    GLFW_UNUSED(mods)
+
+    if (button == GLFW_MOUSE_BUTTON_LEFT)
+        GLFW_mouseLeft = action == GLFW_PRESS ? 1 : 0; 
+
+    Clay_SetPointerState(GLFW_mousePosition, GLFW_mouseLeft);
+	if (GLFW_old_cursor != NULL)
+		GLFW_old_button(window, button, action, mods);
+}
+
+static void mouseCursorPosCallback(GLFWwindow *window, double x, double y) {
+    GLFW_UNUSED(window);
+
+    GLFW_mousePosition = (Clay_Vector2){ (float)x, (float)y };
+    Clay_SetPointerState(GLFW_mousePosition, GLFW_mouseLeft);
+	if (GLFW_old_cursor != NULL)
+		GLFW_old_cursor(window, x, y);
+}
+
+static void mouseScrollCallback(GLFWwindow *window, double xoffset, double yoffset) {
+    GLFW_UNUSED(window)
+
+    Clay_UpdateScrollContainers(
+        false,
+        (Clay_Vector2) { xoffset, yoffset },
+        0
+    );
+
+	if (GLFW_old_scroll != NULL)
+		GLFW_old_scroll(window, xoffset, yoffset);
+}
+
+void clay_GLFW_callbackInit(GLFWwindow* window) {
+	GLFW_old_key = glfwSetKeyCallback(window, keyCallback);
+    GLFW_old_char = glfwSetCharCallback(window, charCallback);
+    GLFW_old_resize = glfwSetWindowSizeCallback(window, windowSizeCallback);
+    GLFW_old_button = glfwSetMouseButtonCallback(window, mouseButtonCallback);
+    GLFW_old_cursor = glfwSetCursorPosCallback(window, mouseCursorPosCallback);
+    GLFW_old_scroll = glfwSetScrollCallback(window, mouseScrollCallback);
+}

examples/RSGL_rendering/RGFW_windowing/CMakeLists.txt

@@ -0,0 +1,38 @@
+cmake_minimum_required(VERSION 3.10)
+
+project(MyProject)
+
+set(SRC main.c)
+
+# Detect OS
+if(WIN32)
+    set(LIBS -ggdb -lshell32 -lwinmm -lgdi32 -lopengl32)
+    set(EXT ".exe")
+elseif(APPLE)
+    set(LIBS -lm -framework Foundation -framework AppKit -framework IOKit -framework OpenGL)
+    set(EXT "")
+elseif(UNIX)
+    set(LIBS -lXrandr -lX11 -lm -lGL -ldl -lpthread)
+    set(EXT "")
+else()
+    set(detected_OS "Unknown")
+endif()
+
+# Settings for emcc
+if(CMAKE_C_COMPILER MATCHES "emcc")
+    set(EXPORTED_JS "-s EXPORTED_RUNTIME_METHODS=['stringToNewUTF8']")
+    set(LIBS "-s FULL_ES3 -s WASM=1 -s ASYNCIFY -s USE_WEBGL2=1 -s GL_SUPPORT_EXPLICIT_SWAP_CONTROL=1 ${EXPORTED_JS}")
+    set(LIBS "${LIBS} -s EXPORTED_FUNCTIONS=['_malloc', '_main']")
+    set(EXT ".js")
+    set(CMAKE_C_COMPILER "emcc")
+    set(LIBS "${LIBS} --preload-file ./")
+endif()
+
+# Include directories
+include_directories(../../../ ../../../renderers/RSGL)
+
+# Add executable
+add_executable(main${EXT} ${SRC})
+
+# Link libraries
+target_link_libraries(main${EXT} ${LIBS})