Expose scissor functionality

src/core.c

@@ -1392,6 +1392,23 @@ void EndTextureMode(void)
     currentHeight = GetScreenHeight();
 }
 
+// Begin scissor mode (define screen area for following drawing)
+// NOTE: Scissor rec refers to bottom-left corner, we change it to upper-left
+void BeginScissorMode(int x, int y, int width, int height)
+{
+    rlglDraw(); // Force drawing elements
+
+    rlEnableScissorTest();
+    rlScissor(x, GetScreenHeight() - (y + height), width, height);
+}
+
+// End scissor mode
+void EndScissorMode(void)
+{
+    rlglDraw(); // Force drawing elements
+    rlDisableScissorTest();
+}
+
 // Returns a ray trace from mouse position
 Ray GetMouseRay(Vector2 mousePosition, Camera camera)
 {

src/raylib.h

@@ -904,6 +904,8 @@ RLAPI void BeginMode3D(Camera3D camera);                          // Initializes
 RLAPI void EndMode3D(void);                                       // Ends 3D mode and returns to default 2D orthographic mode
 RLAPI void BeginTextureMode(RenderTexture2D target);              // Initializes render texture for drawing
 RLAPI void EndTextureMode(void);                                  // Ends drawing to render texture
+RLAPI void BeginScissorMode(int x, int y, int width, int height); // Begin scissor mode (define screen area for following drawing)
+RLAPI void EndScissorMode(void);                                  // End scissor mode
 
 // Screen-space-related functions
 RLAPI Ray GetMouseRay(Vector2 mousePosition, Camera camera);      // Returns a ray trace from mouse position
@@ -1324,8 +1326,6 @@ RLAPI void BeginShaderMode(Shader shader);                                // Beg
 RLAPI void EndShaderMode(void);                                           // End custom shader drawing (use default shader)
 RLAPI void BeginBlendMode(int mode);                                      // Begin blending mode (alpha, additive, multiplied)
 RLAPI void EndBlendMode(void);                                            // End blending mode (reset to default: alpha blending)
-RLAPI void BeginScissorMode(int x, int y, int width, int height);         // Begin scissor mode (define screen area for following drawing)
-RLAPI void EndScissorMode(void);                                          // End scissor mode
 
 // VR control functions
 RLAPI void InitVrSimulator(void);                       // Init VR simulator for selected device parameters

src/rlgl.h

@@ -457,6 +457,9 @@ RLAPI void rlEnableDepthTest(void);                           // Enable depth te
 RLAPI void rlDisableDepthTest(void);                          // Disable depth test
 RLAPI void rlEnableBackfaceCulling(void);                     // Enable backface culling
 RLAPI void rlDisableBackfaceCulling(void);                    // Disable backface culling
+RLAPI void rlEnableScissorTest(void);                         // Enable scissor test
+RLAPI void rlDisableScissorTest(void);                        // Disable scissor test
+RLAPI void rlScissor(int x, int y, int width, int height);    // Scissor test
 RLAPI void rlEnableWireMode(void);                            // Enable wire mode
 RLAPI void rlDisableWireMode(void);                           // Disable wire mode
 RLAPI void rlDeleteTextures(unsigned int id);                 // Delete OpenGL texture from GPU
@@ -1344,28 +1347,25 @@ void rlDisableRenderTexture(void)
 }
 
 // Enable depth test
-void rlEnableDepthTest(void)
-{
-    glEnable(GL_DEPTH_TEST);
-}
+void rlEnableDepthTest(void) { glEnable(GL_DEPTH_TEST); }
 
 // Disable depth test
-void rlDisableDepthTest(void)
-{
-    glDisable(GL_DEPTH_TEST);
-}
+void rlDisableDepthTest(void) { glDisable(GL_DEPTH_TEST); }
 
 // Enable backface culling
-void rlEnableBackfaceCulling(void)
-{
-    glEnable(GL_CULL_FACE);
-}
+void rlEnableBackfaceCulling(void) { glEnable(GL_CULL_FACE); }
 
 // Disable backface culling
-void rlDisableBackfaceCulling(void)
-{
-    glDisable(GL_CULL_FACE);
-}
+void rlDisableBackfaceCulling(void) { glDisable(GL_CULL_FACE); }
+
+// Enable scissor test
+RLAPI void rlEnableScissorTest(void) { glEnable(GL_SCISSOR_TEST); }
+
+// Disable scissor test
+RLAPI void rlDisableScissorTest(void) { glDisable(GL_SCISSOR_TEST); }
+
+// Scissor test
+RLAPI void rlScissor(int x, int y, int width, int height) { glScissor(x, y, width, height); }
 
 // Enable wire mode
 void rlEnableWireMode(void)
@@ -1698,7 +1698,6 @@ void rlglInit(int width, int height)
 
     // Initialize OpenGL default states
     //----------------------------------------------------------
-
     // Init state: Depth test
     glDepthFunc(GL_LEQUAL);                                 // Type of depth testing to apply
     glDisable(GL_DEPTH_TEST);                               // Disable depth testing for 2D (only used for 3D)
@@ -3524,24 +3523,6 @@ void EndBlendMode(void)
     BeginBlendMode(BLEND_ALPHA);
 }
 
-// Begin scissor mode (define screen area for following drawing)
-// NOTE: Scissor rec refers to bottom-left corner, we change it to upper-left
-void BeginScissorMode(int x, int y, int width, int height)
-{
-    rlglDraw();             // Force drawing elements
-
-    glEnable(GL_SCISSOR_TEST);
-    glScissor(x, framebufferHeight - (y + height), width, height);
-}
-
-// End scissor mode
-void EndScissorMode(void)
-{
-    rlglDraw();             // Force drawing elements
-
-    glDisable(GL_SCISSOR_TEST);
-}
-
 #if defined(SUPPORT_VR_SIMULATOR)
 // Init VR simulator for selected device parameters
 // NOTE: It modifies the global variable: stereoFbo