From 258f0f5c31decbb25eddde798b3a4bcc6a7cc6dd Mon Sep 17 00:00:00 2001
From: FernandoS27 <fsahmkow27@gmail.com>
Date: Wed, 24 Oct 2018 19:25:28 -0400
Subject: Implement Mip Filter

---
 src/video_core/renderer_opengl/gl_rasterizer.cpp   | 10 +++++---
 src/video_core/renderer_opengl/gl_rasterizer.h     |  1 +
 .../renderer_opengl/gl_rasterizer_cache.h          |  4 ++--
 src/video_core/renderer_opengl/maxwell_to_gl.h     | 28 ++++++++++++++++++----
 4 files changed, 33 insertions(+), 10 deletions(-)

(limited to 'src/video_core')

diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index cb180b93c..7bb5544fc 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -731,11 +731,15 @@ void RasterizerOpenGL::SamplerInfo::SyncWithConfig(const Tegra::Texture::TSCEntr
 
     if (mag_filter != config.mag_filter) {
         mag_filter = config.mag_filter;
-        glSamplerParameteri(s, GL_TEXTURE_MAG_FILTER, MaxwellToGL::TextureFilterMode(mag_filter));
+        glSamplerParameteri(
+            s, GL_TEXTURE_MAG_FILTER,
+            MaxwellToGL::TextureFilterMode(mag_filter, Tegra::Texture::TextureMipmapFilter::None));
     }
-    if (min_filter != config.min_filter) {
+    if (min_filter != config.min_filter || mip_filter != config.mip_filter) {
         min_filter = config.min_filter;
-        glSamplerParameteri(s, GL_TEXTURE_MIN_FILTER, MaxwellToGL::TextureFilterMode(min_filter));
+        mip_filter = config.mip_filter;
+        glSamplerParameteri(s, GL_TEXTURE_MIN_FILTER,
+                            MaxwellToGL::TextureFilterMode(min_filter, mip_filter));
     }
 
     if (wrap_u != config.wrap_u) {
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.h b/src/video_core/renderer_opengl/gl_rasterizer.h
index 5020a5392..7b0615125 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer.h
@@ -93,6 +93,7 @@ private:
     private:
         Tegra::Texture::TextureFilter mag_filter;
         Tegra::Texture::TextureFilter min_filter;
+        Tegra::Texture::TextureMipmapFilter mip_filter;
         Tegra::Texture::WrapMode wrap_u;
         Tegra::Texture::WrapMode wrap_v;
         Tegra::Texture::WrapMode wrap_p;
diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.h b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
index 5bcd33156..68479d55a 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
@@ -919,7 +919,7 @@ struct SurfaceParams {
         u32 height = MipHeight(mip_level);
         u32 bh = block_height;
         // Magical block resizing algorithm, needs more testing.
-        while (bh != 1 && height / bh <= 16) {
+        while (bh > 1 && (height +  bh - 1) / bh <= 16) {
             bh = bh >> 1;
         }
         return bh;
@@ -929,7 +929,7 @@ struct SurfaceParams {
         u32 depth = MipDepth(mip_level);
         u32 bd = block_depth;
         // Magical block resizing algorithm, needs more testing.
-        while (bd != 1 && depth / bd <= 16) {
+        while (bd > 1 && depth / bd <= 16) {
             bd = bd >> 1;
         }
         return bd;
diff --git a/src/video_core/renderer_opengl/maxwell_to_gl.h b/src/video_core/renderer_opengl/maxwell_to_gl.h
index 0f6dcab2b..76c3b65bd 100644
--- a/src/video_core/renderer_opengl/maxwell_to_gl.h
+++ b/src/video_core/renderer_opengl/maxwell_to_gl.h
@@ -135,12 +135,29 @@ inline GLenum PrimitiveTopology(Maxwell::PrimitiveTopology topology) {
     return {};
 }
 
-inline GLenum TextureFilterMode(Tegra::Texture::TextureFilter filter_mode) {
+inline GLenum TextureFilterMode(Tegra::Texture::TextureFilter filter_mode,
+                                Tegra::Texture::TextureMipmapFilter mip_filter_mode) {
     switch (filter_mode) {
-    case Tegra::Texture::TextureFilter::Linear:
-        return GL_LINEAR;
-    case Tegra::Texture::TextureFilter::Nearest:
-        return GL_NEAREST;
+    case Tegra::Texture::TextureFilter::Linear: {
+        switch (mip_filter_mode) {
+        case Tegra::Texture::TextureMipmapFilter::None:
+            return GL_LINEAR;
+        case Tegra::Texture::TextureMipmapFilter::Nearest:
+            return GL_NEAREST_MIPMAP_LINEAR;
+        case Tegra::Texture::TextureMipmapFilter::Linear:
+            return GL_LINEAR_MIPMAP_LINEAR;
+        }
+    }
+    case Tegra::Texture::TextureFilter::Nearest: {
+        switch (mip_filter_mode) {
+        case Tegra::Texture::TextureMipmapFilter::None:
+            return GL_NEAREST;
+        case Tegra::Texture::TextureMipmapFilter::Nearest:
+            return GL_NEAREST_MIPMAP_NEAREST;
+        case Tegra::Texture::TextureMipmapFilter::Linear:
+            return GL_LINEAR_MIPMAP_NEAREST;
+        }
+    }
     }
     LOG_CRITICAL(Render_OpenGL, "Unimplemented texture filter mode={}",
                  static_cast<u32>(filter_mode));
@@ -148,6 +165,7 @@ inline GLenum TextureFilterMode(Tegra::Texture::TextureFilter filter_mode) {
     return {};
 }
 
+
 inline GLenum WrapMode(Tegra::Texture::WrapMode wrap_mode) {
     switch (wrap_mode) {
     case Tegra::Texture::WrapMode::Wrap:
-- 
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