diff --git a/include/cglm-cam.h b/include/cglm-cam.h
index e69b103..71edb81 100644
--- a/include/cglm-cam.h
+++ b/include/cglm-cam.h
@@ -68,7 +68,7 @@ glm_ortho_default(mat4 dest) {
   GLint rect[4];
   float aspectRatio;
 
-  glGetIntegerv(GL_VIEWPORT, rect);
+  glm_platfom_get_viewport_rect(rect);
   aspectRatio = (float)rect[2]/rect[3];
 
   if (rect[2] >= rect[3]) {
@@ -114,11 +114,11 @@ glm_perspective(float fovy,
 CGLM_INLINE
 void
 glm_perspective_default(mat4 dest) {
-  GLint viewport[4];
-  glGetIntegerv(GL_VIEWPORT, viewport);
+  GLint rect[4];
+  glm_platfom_get_viewport_rect(rect);
   
   glm_perspective((float)M_PI_4,
-                  (float)viewport[2]/viewport[3],
+                  (float)rect[2]/rect[3],
                   0.01f,
                   100.0f,
                   dest);
diff --git a/include/cglm-opengl.h b/include/cglm-opengl.h
index 7082277..86b5ff1 100644
--- a/include/cglm-opengl.h
+++ b/include/cglm-opengl.h
@@ -14,7 +14,7 @@
 CGLM_INLINE
 void
 glm_mat4_uniform(mat4 m, GLint location){
-  glUniformMatrix4fv(location, 1, GL_FALSE, m[0]);
+  glm_platform_uniform_mat4fv(location, m[0]);
 }
 
 #endif /* cglm_mat_opengl_h */
diff --git a/include/cglm-platform.h b/include/cglm-platform.h
index a365edf..8fe3282 100644
--- a/include/cglm-platform.h
+++ b/include/cglm-platform.h
@@ -8,6 +8,8 @@
 #ifndef cglm_platform_h
 #define cglm_platform_h
 
+#include "cglm-common.h"
+
 #ifdef __APPLE__
 #  include <OpenGL/gl3.h>
 #else
@@ -25,6 +27,23 @@ glUniformMatrix4fv(GLint location,
                    GLsizei count,
                    GLboolean transpose,
                    const GLfloat *value);
+
+extern
+void
+glGetIntegerv(GLenum pname, GLint *params);
 #endif
 
+CGLM_INLINE
+void
+glm_platform_uniform_mat4fv(int32_t location,
+                            const float *value) {
+  glUniformMatrix4fv(location, 1, GL_FALSE, value);
+}
+
+CGLM_INLINE
+void
+glm_platfom_get_viewport_rect(int32_t *rect) {
+  glGetIntegerv(GL_VIEWPORT, rect);
+}
+
 #endif /* cglm_platform_h */