1 files changed, 44 insertions, 0 deletions
diff --git a/src/common.cpp b/src/common.cpp
index 45ab5b6..060da00 100644
--- a/src/common.cpp
+++ b/src/common.cpp
@@ -34,6 +34,50 @@ std::vector<std::string> StringTokenizer(const std::string& str, char delim)
 	return tokens;
 }
 
+static GLuint *Gshader;
+static GLint *tex_uni;
+static GLint *coord_attrib;
+static GLint *tex_attrib;
+
+void useShader(GLuint *sh, GLint *tu, GLint *ca, GLint *ta)
+{
+    Gshader = sh;
+    tex_uni = tu;
+    coord_attrib = ca;
+    tex_attrib = ta;
+}
+
+void drawRect(vec2 ll, vec2 ur)
+{
+    GLfloat verts[] = {ll.x, ll.y, 1.0,
+                       ur.x, ll.y, 1.0,
+                       ur.x, ur.y, 1.0,
+                       
+                       ur.x, ur.y, 1.0,
+                       ll.x, ur.y, 1.0,
+                       ll.x, ll.y, 1.0};
+   
+    GLfloat tex[] = {0.0, 1.0,
+                     1.0, 1.0,
+                     1.0, 0.0,
+
+                     1.0, 0.0,
+                     0.0, 0.0,
+                     0.0, 1.0};
+
+    glUniform1i(*tex_uni, 0);
+
+    glEnableVertexAttribArray(*coord_attrib);
+    glEnableVertexAttribArray(*tex_attrib);
+
+    glVertexAttribPointer(*coord_attrib, 3, GL_FLOAT, GL_FALSE, 0, verts);
+    glVertexAttribPointer(*tex_attrib, 2, GL_FLOAT, GL_FALSE, 0, tex);
+    glDrawArrays(GL_TRIANGLES, 0, 6);
+
+    glDisableVertexAttribArray(*tex_attrib);  
+    glDisableVertexAttribArray(*coord_attrib);
+}
+
 void DEBUG_prints(const char* file, int line, const char *s,...)
 {
 	va_list args;