Outsource glfwGetProcAddress

CMakeLists.txt

@@ -28,23 +28,3 @@ embed_resource(gles-compatibility-layer "src/shaders/${SHADER_FOLDER}/main.fsh")
 
 # Warnings
 target_compile_options(gles-compatibility-layer PRIVATE -Wall -Wextra -Werror -Wpointer-arith -Wshadow -Wnull-dereference)
-
-# GLFW/SDL
-option(GLES_COMPATIBILITY_LAYER_USE_SDL "Use SDL" TRUE)
-if(GLES_COMPATIBILITY_LAYER_USE_SDL)
-    target_compile_definitions(gles-compatibility-layer PUBLIC GLES_COMPATIBILITY_LAYER_USE_SDL)
-endif()
-
-# Dependencies
-set(GLES_COMPATIBILITY_LAYER_DEPENDENCY "" CACHE STRING "Compatibility Layer Dependency")
-if(GLES_COMPATIBILITY_LAYER_DEPENDENCY STREQUAL "")
-    if(GLES_COMPATIBILITY_LAYER_USE_SDL)
-        find_package(SDL2 REQUIRED)
-        target_link_libraries(gles-compatibility-layer SDL2::SDL2)
-    else()
-        find_package(glfw3 3.3 REQUIRED)
-        target_link_libraries(gles-compatibility-layer glfw)
-    endif()
-else()
-    target_link_libraries(gles-compatibility-layer "${GLES_COMPATIBILITY_LAYER_DEPENDENCY}")
-endif()

include/GLES/gl.h

@@ -186,7 +186,9 @@ void glGetQueryObjectuivARB(GLuint id, GLenum pname, GLuint *params);
 void extra_enable_highlight_mode(float red, float green, float blue, float alpha);
 void extra_disable_highlight_mode();
 
-void init_gles_compatibility_layer();
+// Init
+typedef void *(*getProcAddress_t)(const char *);
+void init_gles_compatibility_layer(getProcAddress_t);
 
 #ifdef __cplusplus
 }

src/draw.c

@@ -119,7 +119,10 @@ static GLuint get_shader() {
 GL_FUNC(glGenVertexArrays, void, (GLsizei n, GLuint *arrays));
 GL_FUNC(glBindVertexArray, void, (GLuint array));
 #endif
-void init_gles_compatibility_layer() {
+void init_gles_compatibility_layer(getProcAddress_t new_getProcAddress) {
+    // Setup Passthrough
+    getProcAddress = new_getProcAddress;
+
     // State
     _init_gles_compatibility_layer_state();
 

src/passthrough.c

@@ -1,7 +1,8 @@
-#include <GLES/gl.h>
-
 #include "passthrough.h"
 
+// Get GL Function
+getProcAddress_t getProcAddress;
+
 // Simple v1.1 -> v2.0 Passthrough Functions
 GL_FUNC(glLineWidth, void, (GLfloat width));
 void glLineWidth(GLfloat width) {

src/passthrough.h

@@ -1,10 +1,4 @@
-#ifdef GLES_COMPATIBILITY_LAYER_USE_SDL
+#include <GLES/gl.h>
-#include <SDL.h>
-#else
-#define GLFW_INCLUDE_NONE
-#include <GLFW/glfw3.h>
-#define SDL_GL_GetProcAddress glfwGetProcAddress
-#endif
 
 #include "log.h"
 
@@ -21,6 +15,7 @@ extern void add_test(const char *function_name);
 #endif
 
 // Load GL Function
+extern getProcAddress_t getProcAddress;
 #if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
 #define GL_APIENTRY __stdcall
 #else
@@ -32,7 +27,7 @@ extern void add_test(const char *function_name);
     real_##name##_t real_##name() { \
         static real_##name##_t func = NULL; \
         if (!func) { \
-            func = (real_##name##_t) SDL_GL_GetProcAddress(#name); \
+            func = (real_##name##_t) getProcAddress(#name); \
             if (!func) { \
                 ERR("Error Resolving GL Symbol: " #name); \
             } \

test/CMakeLists.txt

@@ -2,10 +2,13 @@ cmake_minimum_required(VERSION 3.16.0)
 project(gles-compatibility-layer-test)
 
 # Build Library
-set(GLES_COMPATIBILITY_LAYER_USE_SDL FALSE CACHE BOOL "" FORCE)
 add_subdirectory(.. gles-compatibility-layer)
 target_compile_definitions(gles-compatibility-layer PRIVATE GLES_COMPATIBILITY_LAYER_TESTING)
 
 # Build
 add_executable(main src/main.cpp)
 target_link_libraries(main gles-compatibility-layer)
+
+# GLFW
+find_package(glfw3 3.3 REQUIRED)
+target_link_libraries(main glfw)

test/src/main.cpp

@@ -110,7 +110,7 @@ int main() {
     glfwMakeContextCurrent(glfw_window);
 
     // Setup Compatibility Layer
-    init_gles_compatibility_layer();
+    init_gles_compatibility_layer((getProcAddress_t) glfwGetProcAddress);
 
     // Run Tests
     load_headers();