From 97fb6179b943f9f87bd7cbf185da1153aaae9309 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sat, 29 Dec 2018 17:51:32 -0300
Subject: gl_rasterizer_cache: Texture view if shader samples array but OGL is
 not

When a shader samples a texture array but that texture in OpenGL is
created without layers, use a texture view to increase the texture
hierarchy. For example, instead of binding a GL_TEXTURE_2D bind a
GL_TEXTURE_2D_ARRAY view.
---
 .../renderer_opengl/gl_rasterizer_cache.h          | 32 ++++++++++++++++++++--
 1 file changed, 29 insertions(+), 3 deletions(-)

(limited to 'src/video_core/renderer_opengl/gl_rasterizer_cache.h')

diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.h b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
index c710aa245..7223700c4 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
@@ -293,10 +293,31 @@ public:
         return texture;
     }
 
+    const OGLTexture& TextureLayer() {
+        if (params.is_layered) {
+            return Texture();
+        }
+        EnsureTextureView();
+        return texture_view;
+    }
+
     GLenum Target() const {
         return gl_target;
     }
 
+    GLenum TargetLayer() const {
+        using VideoCore::Surface::SurfaceTarget;
+        switch (params.target) {
+        case SurfaceTarget::Texture1D:
+            return GL_TEXTURE_1D_ARRAY;
+        case SurfaceTarget::Texture2D:
+            return GL_TEXTURE_2D_ARRAY;
+        case SurfaceTarget::TextureCubemap:
+            return GL_TEXTURE_CUBE_MAP_ARRAY;
+        }
+        return Target();
+    }
+
     const SurfaceParams& GetSurfaceParams() const {
         return params;
     }
@@ -311,11 +332,16 @@ public:
 private:
     void UploadGLMipmapTexture(u32 mip_map, GLuint read_fb_handle, GLuint draw_fb_handle);
 
+    void EnsureTextureView();
+
     OGLTexture texture;
+    OGLTexture texture_view;
     std::vector<std::vector<u8>> gl_buffer;
-    SurfaceParams params;
-    GLenum gl_target;
-    std::size_t cached_size_in_bytes;
+    SurfaceParams params{};
+    GLenum gl_target{};
+    GLenum gl_internal_format{};
+    bool gl_is_compressed{};
+    std::size_t cached_size_in_bytes{};
 };
 
 class RasterizerCacheOpenGL final : public RasterizerCache<Surface> {
-- 
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