From dc3443602b8352e76b6e5b89eca00909469b22eb Mon Sep 17 00:00:00 2001
From: Alex Szpakowski <slime73@gmail.com>
Date: Fri, 21 Dec 2018 20:53:31 -0400
Subject: [PATCH] render: Fix internal state getting out of sync when
 destroying a texture that was just rendered and then creating a new one, in
 the GL and GLES2 backends. Fixes bug #4433.

---
 src/render/opengl/SDL_render_gl.c       | 7 +++++++
 src/render/opengles2/SDL_render_gles2.c | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/src/render/opengl/SDL_render_gl.c b/src/render/opengl/SDL_render_gl.c
index 01d6dadf01e99..29b6c9c3147a9 100644
--- a/src/render/opengl/SDL_render_gl.c
+++ b/src/render/opengl/SDL_render_gl.c
@@ -1388,6 +1388,13 @@ GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
 
     GL_ActivateRenderer(renderer);
 
+    if (renderdata->drawstate.texture == texture) {
+        renderdata->drawstate.texture = NULL;
+    }
+    if (renderdata->drawstate.target == texture) {
+        renderdata->drawstate.target = NULL;
+    }
+
     if (!data) {
         return;
     }
diff --git a/src/render/opengles2/SDL_render_gles2.c b/src/render/opengles2/SDL_render_gles2.c
index ad79fdd307568..f2d4eb308eef4 100644
--- a/src/render/opengles2/SDL_render_gles2.c
+++ b/src/render/opengles2/SDL_render_gles2.c
@@ -1766,6 +1766,13 @@ GLES2_DestroyTexture(SDL_Renderer *renderer, SDL_Texture *texture)
 
     GLES2_ActivateRenderer(renderer);
 
+    if (data->drawstate.texture == texture) {
+        data->drawstate.texture = NULL;
+    }
+    if (data->drawstate.target == texture) {
+        data->drawstate.target = NULL;
+    }
+
     /* Destroy the texture */
     if (tdata) {
         data->glDeleteTextures(1, &tdata->texture);