From 8824963c806ce80ed919feeb8cae41dbf3116e50 Mon Sep 17 00:00:00 2001
From: Jaakko Keränen <jaakko.keranen@iki.fi>
Date: Sat, 12 Sep 2020 23:14:58 +0300
Subject: Paint: Keeping track of the set render target

---
 src/ui/paint.c | 18 ++++++++++++++----
 src/ui/paint.h |  3 ++-
 2 files changed, 16 insertions(+), 5 deletions(-)

(limited to 'src')

diff --git a/src/ui/paint.c b/src/ui/paint.c
index 0166e398..d0a4a579 100644
--- a/src/ui/paint.c
+++ b/src/ui/paint.c
@@ -36,18 +36,28 @@ static void setColor_Paint_(const iPaint *d, int color) {
 
 void init_Paint(iPaint *d) {
     d->dst = get_Window();
+    d->setTarget = NULL;
     d->oldTarget = NULL;
 }
 
 void beginTarget_Paint(iPaint *d, SDL_Texture *target) {
     SDL_Renderer *rend = renderer_Paint_(d);
-    d->oldTarget = SDL_GetRenderTarget(rend);
-    SDL_SetRenderTarget(rend, target);
+    if (!d->setTarget) {
+        d->oldTarget = SDL_GetRenderTarget(rend);
+        SDL_SetRenderTarget(rend, target);
+        d->setTarget = target;
+    }
+    else {
+        iAssert(d->setTarget == target);
+    }
 }
 
 void endTarget_Paint(iPaint *d) {
-    SDL_SetRenderTarget(renderer_Paint_(d), d->oldTarget);
-    d->oldTarget = NULL;
+    if (d->setTarget) {
+        SDL_SetRenderTarget(renderer_Paint_(d), d->oldTarget);
+        d->oldTarget = NULL;
+        d->setTarget = NULL;
+    }
 }
 
 void setClip_Paint(iPaint *d, iRect rect) {
diff --git a/src/ui/paint.h b/src/ui/paint.h
index 7c9e5e51..28931815 100644
--- a/src/ui/paint.h
+++ b/src/ui/paint.h
@@ -30,7 +30,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
 iDeclareType(Paint)
 
 struct Impl_Paint {
-    iWindow *dst;
+    iWindow *    dst;
+    SDL_Texture *setTarget;
     SDL_Texture *oldTarget;
 };
 
-- 
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