From 3233fa5dc8780975497dc8ce70d10d0186e50b62 Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Thu, 7 Oct 2021 23:55:40 -0400
Subject: [PATCH] gl_texture_cache: Disable scissor test when scaling textures

Fixes a bug on BOTW where some objects were no longer being rendered after blitting
---
 src/video_core/renderer_opengl/gl_texture_cache.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/video_core/renderer_opengl/gl_texture_cache.cpp b/src/video_core/renderer_opengl/gl_texture_cache.cpp
index c68a51ebbe..3dfd13d6a9 100644
--- a/src/video_core/renderer_opengl/gl_texture_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_texture_cache.cpp
@@ -939,6 +939,11 @@ bool Image::Scale() {
         dst_info.size.height = scaled_height;
         upscaled_backup = MakeImage(dst_info, gl_internal_format);
     }
+    // TODO (ameerj): Investigate other GL states that affect blitting.
+    GLboolean scissor_test;
+    glGetBooleani_v(GL_SCISSOR_TEST, 0, &scissor_test);
+    glDisablei(GL_SCISSOR_TEST, 0);
+
     const GLuint read_fbo = runtime->rescale_read_fbos[fbo_index].handle;
     const GLuint draw_fbo = runtime->rescale_draw_fbos[fbo_index].handle;
     for (s32 layer = 0; layer < info.resources.layers; ++layer) {
@@ -955,6 +960,9 @@ bool Image::Scale() {
                                    0, dst_level_width, dst_level_height, mask, filter);
         }
     }
+    if (scissor_test != GL_FALSE) {
+        glEnablei(GL_SCISSOR_TEST, 0);
+    }
     current_texture = upscaled_backup.handle;
     return true;
 }