OpenGL: Use Sampler Objects to decouple sampler config from textures

Fixes #978

4 files changed, 76 insertions, 21 deletions

diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index b556ea65b..0260a28ce 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -68,6 +68,12 @@ void RasterizerOpenGL::InitObjects() {
         uniform_tev_cfg.updates_combiner_buffer_color_alpha = glGetUniformLocation(shader.handle, (tev_ref_str + ".updates_combiner_buffer_color_alpha").c_str());
     }
 
+    // Create sampler objects
+    for (int i = 0; i < texture_samplers.size(); ++i) {
+        texture_samplers[i].Create();
+        state.texture_units[i].sampler = texture_samplers[i].sampler.handle;
+    }
+
     // Generate VBO and VAO
     vertex_buffer.Create();
     vertex_array.Create();
@@ -445,6 +451,45 @@ void RasterizerOpenGL::NotifyFlush(PAddr addr, u32 size) {
     res_cache.NotifyFlush(addr, size);
 }
 
+void RasterizerOpenGL::SamplerInfo::Create() {
+    sampler.Create();
+    mag_filter = min_filter = TextureConfig::Linear;
+    wrap_s = wrap_t = TextureConfig::Repeat;
+    border_color = 0;
+
+    glSamplerParameteri(sampler.handle, GL_TEXTURE_MIN_FILTER, GL_LINEAR); // default is GL_LINEAR_MIPMAP_LINEAR
+    // Other attributes have correct defaults
+}
+
+void RasterizerOpenGL::SamplerInfo::SyncWithConfig(const Pica::Regs::TextureConfig& config) {
+    GLuint s = sampler.handle;
+
+    if (mag_filter != config.mag_filter) {
+        mag_filter = config.mag_filter;
+        glSamplerParameteri(s, GL_TEXTURE_MAG_FILTER, PicaToGL::TextureFilterMode(mag_filter));
+    }
+    if (min_filter != config.min_filter) {
+        min_filter = config.min_filter;
+        glSamplerParameteri(s, GL_TEXTURE_MIN_FILTER, PicaToGL::TextureFilterMode(min_filter));
+    }
+
+    if (wrap_s != config.wrap_s) {
+        wrap_s = config.wrap_s;
+        glSamplerParameteri(s, GL_TEXTURE_WRAP_S, PicaToGL::WrapMode(wrap_s));
+    }
+    if (wrap_t != config.wrap_t) {
+        wrap_t = config.wrap_t;
+        glSamplerParameteri(s, GL_TEXTURE_WRAP_T, PicaToGL::WrapMode(wrap_t));
+    }
+
+    if (wrap_s == TextureConfig::ClampToBorder || wrap_t == TextureConfig::ClampToBorder) {
+        if (border_color != config.border_color.raw) {
+            auto gl_color = PicaToGL::ColorRGBA8(border_color);
+            glSamplerParameterfv(s, GL_TEXTURE_BORDER_COLOR, gl_color.data());
+        }
+    }
+}
+
 void RasterizerOpenGL::ReconfigureColorTexture(TextureInfo& texture, Pica::Regs::ColorFormat format, u32 width, u32 height) {
     GLint internal_format;
 
@@ -772,6 +817,7 @@ void RasterizerOpenGL::SyncDrawState() {
         const auto& texture = pica_textures[texture_index];
 
         if (texture.enabled) {
+            texture_samplers[texture_index].SyncWithConfig(texture.config);
             res_cache.LoadAndBindTexture(state, texture_index, texture);
         } else {
             state.texture_units[texture_index].texture_2d = 0;
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.h b/src/video_core/renderer_opengl/gl_rasterizer.h
index a02d5c856..24560d7f8 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer.h
@@ -80,6 +80,24 @@ private:
         GLenum gl_type;
     };
 
+    struct SamplerInfo {
+        using TextureConfig = Pica::Regs::TextureConfig;
+
+        OGLSampler sampler;
+
+        /// Creates the sampler object, initializing its state so that it's in sync with the SamplerInfo struct.
+        void Create();
+        /// Syncs the sampler object with the config, updating any necessary state.
+        void SyncWithConfig(const TextureConfig& config);
+
+    private:
+        TextureConfig::TextureFilter mag_filter;
+        TextureConfig::TextureFilter min_filter;
+        TextureConfig::WrapMode wrap_s;
+        TextureConfig::WrapMode wrap_t;
+        u32 border_color;
+    };
+
     /// Structure that the hardware rendered vertices are composed of
     struct HardwareVertex {
         HardwareVertex(const Pica::Shader::OutputVertex& v) {
@@ -193,6 +211,7 @@ private:
     PAddr last_fb_depth_addr;
 
     // Hardware rasterizer
+    std::array<SamplerInfo, 3> texture_samplers;
     TextureInfo fb_color_texture;
     DepthTextureInfo fb_depth_texture;
     OGLShader shader;
diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
index 5d9a80cd4..d9ccf2a3f 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
@@ -20,9 +20,8 @@ RasterizerCacheOpenGL::~RasterizerCacheOpenGL() {
 
 MICROPROFILE_DEFINE(OpenGL_TextureUpload, "OpenGL", "Texture Upload", MP_RGB(128, 64, 192));
 
-void RasterizerCacheOpenGL::LoadAndBindTexture(OpenGLState &state, unsigned texture_unit, const Pica::Regs::FullTextureConfig& config) {
-    PAddr texture_addr = config.config.GetPhysicalAddress();
-    const auto cached_texture = texture_cache.find(texture_addr);
+void RasterizerCacheOpenGL::LoadAndBindTexture(OpenGLState &state, unsigned texture_unit, const Pica::DebugUtils::TextureInfo& info) {
+    const auto cached_texture = texture_cache.find(info.physical_address);
 
     if (cached_texture != texture_cache.end()) {
         state.texture_units[texture_unit].texture_2d = cached_texture->second->texture.handle;
@@ -37,26 +36,12 @@ void RasterizerCacheOpenGL::LoadAndBindTexture(OpenGLState &state, unsigned text
         state.Apply();
         glActiveTexture(GL_TEXTURE0 + texture_unit);
 
-        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, PicaToGL::TextureFilterMode(config.config.mag_filter));
-        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, PicaToGL::TextureFilterMode(config.config.min_filter));
-
-        GLenum wrap_s = PicaToGL::WrapMode(config.config.wrap_s);
-        GLenum wrap_t = PicaToGL::WrapMode(config.config.wrap_t);
-        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap_s);
-        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap_t);
-
-        if (wrap_s == GL_CLAMP_TO_BORDER || wrap_t == GL_CLAMP_TO_BORDER) {
-            auto border_color = PicaToGL::ColorRGBA8(config.config.border_color.raw);
-            glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, border_color.data());
-        }
-
-        const auto info = Pica::DebugUtils::TextureInfo::FromPicaRegister(config.config, config.format);
-        u8* texture_src_data = Memory::GetPhysicalPointer(texture_addr);
+        u8* texture_src_data = Memory::GetPhysicalPointer(info.physical_address);
 
         new_texture->width = info.width;
         new_texture->height = info.height;
         new_texture->size = info.stride * info.height;
-        new_texture->addr = texture_addr;
+        new_texture->addr = info.physical_address;
         new_texture->hash = Common::ComputeHash64(texture_src_data, new_texture->size);
 
         std::unique_ptr<Math::Vec4<u8>[]> temp_texture_buffer_rgba(new Math::Vec4<u8>[info.width * info.height]);
@@ -69,7 +54,7 @@ void RasterizerCacheOpenGL::LoadAndBindTexture(OpenGLState &state, unsigned text
 
         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, info.width, info.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, temp_texture_buffer_rgba.get());
 
-        texture_cache.emplace(texture_addr, std::move(new_texture));
+        texture_cache.emplace(info.physical_address, std::move(new_texture));
     }
 }
 
diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.h b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
index d8f9edf59..ec56237b5 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.h
@@ -6,6 +6,7 @@
 
 #include "gl_state.h"
 #include "gl_resource_manager.h"
+#include "video_core/debug_utils/debug_utils.h"
 #include "video_core/pica.h"
 
 #include <memory>
@@ -16,7 +17,11 @@ public:
     ~RasterizerCacheOpenGL();
 
     /// Loads a texture from 3DS memory to OpenGL and caches it (if not already cached)
-    void LoadAndBindTexture(OpenGLState &state, unsigned texture_unit, const Pica::Regs::FullTextureConfig& config);
+    void LoadAndBindTexture(OpenGLState &state, unsigned texture_unit, const Pica::DebugUtils::TextureInfo& info);
+
+    void LoadAndBindTexture(OpenGLState &state, unsigned texture_unit, const Pica::Regs::FullTextureConfig& config) {
+        LoadAndBindTexture(state, texture_unit, Pica::DebugUtils::TextureInfo::FromPicaRegister(config.config, config.format));
+    }
 
     /// Flush any cached resource that touches the flushed region
     void NotifyFlush(PAddr addr, u32 size, bool ignore_hash = false);