From 6fc839a586908e545bae42fc6cef2e469c4bc919 Mon Sep 17 00:00:00 2001
From: Jeffery Myers <jeffm2501@gmail.com>
Date: Sat, 20 Jan 2024 18:23:17 -0800
Subject: [PATCH] Only restore GL scale back to screen scale if we are
 returning to a screen, not a render texture.

---
 src/rcore.c | 10 +++++-----
 src/rlgl.h  | 12 ++++++++++++
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/src/rcore.c b/src/rcore.c
index bb06e9beedeb..218d24fe63b0 100644
--- a/src/rcore.c
+++ b/src/rcore.c
@@ -952,9 +952,6 @@ void BeginMode2D(Camera2D camera)
 
     // Apply 2d camera transformation to modelview
     rlMultMatrixf(MatrixToFloat(GetCameraMatrix2D(camera)));
-
-    // Apply screen scaling if required
-    rlMultMatrixf(MatrixToFloat(CORE.Window.screenScale));
 }
 
 // Ends 2D mode with custom camera
@@ -963,7 +960,9 @@ void EndMode2D(void)
     rlDrawRenderBatchActive();      // Update and draw internal render batch
 
     rlLoadIdentity();               // Reset current matrix (modelview)
-    rlMultMatrixf(MatrixToFloat(CORE.Window.screenScale)); // Apply screen scaling if required
+
+    if (rlGetActiveFramebuffer() == 0)
+        rlMultMatrixf(MatrixToFloat(CORE.Window.screenScale)); // Apply screen scaling if required
 }
 
 // Initializes 3D mode with custom camera (3D)
@@ -1016,7 +1015,8 @@ void EndMode3D(void)
     rlMatrixMode(RL_MODELVIEW);     // Switch back to modelview matrix
     rlLoadIdentity();               // Reset current matrix (modelview)
 
-    rlMultMatrixf(MatrixToFloat(CORE.Window.screenScale)); // Apply screen scaling if required
+    if (rlGetActiveFramebuffer() == 0)
+        rlMultMatrixf(MatrixToFloat(CORE.Window.screenScale)); // Apply screen scaling if required
 
     rlDisableDepthTest();           // Disable DEPTH_TEST for 2D
 }
diff --git a/src/rlgl.h b/src/rlgl.h
index 4d2c9702f4b9..ad87f1dcd6f1 100644
--- a/src/rlgl.h
+++ b/src/rlgl.h
@@ -621,6 +621,7 @@ RLAPI void rlDisableShader(void);                       // Disable shader progra
 // Framebuffer state
 RLAPI void rlEnableFramebuffer(unsigned int id);        // Enable render texture (fbo)
 RLAPI void rlDisableFramebuffer(void);                  // Disable render texture (fbo), return to default framebuffer
+RLAPI unsigned int rlGetActiveFramebuffer(void);        // Returns the active render texture (fbo), 0 for default framebuffer
 RLAPI void rlActiveDrawBuffers(int count);              // Activate multiple draw color buffers
 RLAPI void rlBlitFramebuffer(int srcX, int srcY, int srcWidth, int srcHeight, int dstX, int dstY, int dstWidth, int dstHeight, int bufferMask); // Blit active framebuffer to main framebuffer
 RLAPI void rlBindFramebuffer(unsigned int target, unsigned int framebuffer); // Bind framebuffer (FBO) 
@@ -1725,6 +1726,17 @@ void rlEnableFramebuffer(unsigned int id)
 #endif
 }
 
+// return the active render texture (fbo)
+unsigned int rlGetActiveFramebuffer(void)
+{
+#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES3)) && defined(RLGL_RENDER_TEXTURES_HINT)
+    GLint fboId = 0;
+    glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &fboId);
+    return fboId;
+#endif
+	return 0;
+}
+
 // Disable rendering to texture
 void rlDisableFramebuffer(void)
 {