Rasterizer: Refactor draw calls, remove deadcode and clean up.

3 files changed, 68 insertions, 106 deletions

diff --git a/src/video_core/rasterizer_interface.h b/src/video_core/rasterizer_interface.h
index a37b84b8c..fe0d82255 100644
--- a/src/video_core/rasterizer_interface.h
+++ b/src/video_core/rasterizer_interface.h
@@ -31,7 +31,7 @@ public:
     /// Draw the current batch of vertex arrays
     virtual void DrawArrays() = 0;
 
-    /// Draw the current batch of vertex arrays
+    /// Draw the current batch of multiple instasnces of vertex arrays
     virtual void DrawMultiArrays() = 0;
 
     /// Clear the current framebuffer
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index f71a22738..9ca832863 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -49,40 +49,6 @@ MICROPROFILE_DEFINE(OpenGL_Blits, "OpenGL", "Blits", MP_RGB(128, 128, 192));
 MICROPROFILE_DEFINE(OpenGL_CacheManagement, "OpenGL", "Cache Mgmt", MP_RGB(100, 255, 100));
 MICROPROFILE_DEFINE(OpenGL_PrimitiveAssembly, "OpenGL", "Prim Asmbl", MP_RGB(255, 100, 100));
 
-struct DrawParameters {
-    GLenum primitive_mode;
-    GLsizei count;
-    GLint current_instance;
-    bool use_indexed;
-
-    GLint vertex_first;
-
-    GLenum index_format;
-    GLint base_vertex;
-    GLintptr index_buffer_offset;
-
-    void DispatchDraw() const {
-        if (use_indexed) {
-            const auto index_buffer_ptr = reinterpret_cast<const void*>(index_buffer_offset);
-            if (current_instance > 0) {
-                glDrawElementsInstancedBaseVertexBaseInstance(primitive_mode, count, index_format,
-                                                              index_buffer_ptr, 1, base_vertex,
-                                                              current_instance);
-            } else {
-                glDrawElementsBaseVertex(primitive_mode, count, index_format, index_buffer_ptr,
-                                         base_vertex);
-            }
-        } else {
-            if (current_instance > 0) {
-                glDrawArraysInstancedBaseInstance(primitive_mode, vertex_first, count, 1,
-                                                  current_instance);
-            } else {
-                glDrawArrays(primitive_mode, vertex_first, count);
-            }
-        }
-    }
-};
-
 static std::size_t GetConstBufferSize(const Tegra::Engines::ConstBufferInfo& buffer,
                                       const GLShader::ConstBufferEntry& entry) {
     if (!entry.IsIndirect()) {
@@ -270,29 +236,6 @@ GLintptr RasterizerOpenGL::SetupIndexBuffer() {
     return offset;
 }
 
-DrawParameters RasterizerOpenGL::SetupDraw(GLintptr index_buffer_offset) {
-    const auto& gpu = system.GPU().Maxwell3D();
-    const auto& regs = gpu.regs;
-    const bool is_indexed = accelerate_draw == AccelDraw::Indexed;
-
-    DrawParameters params{};
-    params.current_instance = gpu.state.current_instance;
-
-    params.use_indexed = is_indexed;
-    params.primitive_mode = MaxwellToGL::PrimitiveTopology(regs.draw.topology);
-
-    if (is_indexed) {
-        params.index_format = MaxwellToGL::IndexFormat(regs.index_array.format);
-        params.count = regs.index_array.count;
-        params.index_buffer_offset = index_buffer_offset;
-        params.base_vertex = static_cast<GLint>(regs.vb_element_base);
-    } else {
-        params.count = regs.vertex_buffer.count;
-        params.vertex_first = regs.vertex_buffer.first;
-    }
-    return params;
-}
-
 void RasterizerOpenGL::SetupShaders(GLenum primitive_mode) {
     MICROPROFILE_SCOPE(OpenGL_Shader);
     auto& gpu = system.GPU().Maxwell3D();
@@ -784,36 +727,65 @@ void RasterizerOpenGL::DrawPrelude() {
     }
 }
 
+struct DrawParams {
+    bool is_indexed;
+    bool is_instanced;
+    GLenum primitive_mode;
+    GLint count;
+    GLint base_vertex;
+
+    // Indexed settings
+    GLenum index_format;
+    GLintptr index_buffer_offset;
+
+    // Instanced setting
+    GLint num_instances;
+    GLint base_instance;
+
+    void DispatchDraw() {
+        if (is_indexed) {
+            const auto index_buffer_ptr = reinterpret_cast<const void*>(index_buffer_offset);
+            if (is_instanced) {
+                glDrawElementsInstancedBaseVertexBaseInstance(primitive_mode, count, index_format,
+                                                              index_buffer_ptr, num_instances,
+                                                              base_vertex, base_instance);
+            } else {
+                glDrawElementsBaseVertex(primitive_mode, count, index_format, index_buffer_ptr,
+                                         base_vertex);
+            }
+        } else {
+            if (is_instanced) {
+                glDrawArraysInstancedBaseInstance(primitive_mode, base_vertex, count, num_instances,
+                                                  base_instance);
+            } else {
+                glDrawArrays(primitive_mode, base_vertex, count);
+            }
+        }
+    }
+};
+
 void RasterizerOpenGL::DrawArrays() {
     DrawPrelude();
 
     auto& maxwell3d = system.GPU().Maxwell3D();
     const auto& regs = maxwell3d.regs;
     const auto current_instance = maxwell3d.state.current_instance;
-    const auto primitive_mode = MaxwellToGL::PrimitiveTopology(regs.draw.topology);
-    if (accelerate_draw == AccelDraw::Indexed) {
-        const auto index_format = MaxwellToGL::IndexFormat(regs.index_array.format);
-        const auto count = regs.index_array.count;
-        const auto base_vertex = static_cast<GLint>(regs.vb_element_base);
-        const auto index_buffer_ptr = reinterpret_cast<const void*>(index_buffer_offset);
-        if (current_instance > 0) {
-            glDrawElementsInstancedBaseVertexBaseInstance(primitive_mode, count, index_format,
-                                                          index_buffer_ptr, 1, base_vertex,
-                                                          current_instance);
-        } else {
-            glDrawElementsBaseVertex(primitive_mode, count, index_format, index_buffer_ptr,
-                                     base_vertex);
-        }
+    DrawParams draw_call;
+    draw_call.is_indexed = accelerate_draw == AccelDraw::Indexed;
+    draw_call.num_instances = static_cast<GLint>(1);
+    draw_call.base_instance = static_cast<GLint>(current_instance);
+    draw_call.is_instanced = current_instance > 0;
+    draw_call.primitive_mode = MaxwellToGL::PrimitiveTopology(regs.draw.topology);
+    if (draw_call.is_indexed) {
+        draw_call.count = static_cast<GLint>(regs.index_array.count);
+        draw_call.base_vertex = static_cast<GLint>(regs.vb_element_base);
+        draw_call.index_format = MaxwellToGL::IndexFormat(regs.index_array.format);
+        draw_call.index_buffer_offset = index_buffer_offset;
     } else {
-        const auto count = regs.vertex_buffer.count;
-        const auto vertex_first = regs.vertex_buffer.first;
-        if (current_instance > 0) {
-            glDrawArraysInstancedBaseInstance(primitive_mode, vertex_first, count, 1,
-                                              current_instance);
-        } else {
-            glDrawArrays(primitive_mode, vertex_first, count);
-        }
+        draw_call.count = static_cast<GLint>(regs.vertex_buffer.count);
+        draw_call.base_vertex = static_cast<GLint>(regs.vertex_buffer.first);
     }
+    draw_call.DispatchDraw();
 
     accelerate_draw = AccelDraw::Disabled;
     maxwell3d.dirty.memory_general = false;
@@ -825,32 +797,23 @@ void RasterizerOpenGL::DrawMultiArrays() {
     auto& maxwell3d = system.GPU().Maxwell3D();
     const auto& regs = maxwell3d.regs;
     const auto& draw_setup = maxwell3d.mme_draw;
-    const auto num_instances = draw_setup.instance_count;
-    const auto base_instance = static_cast<GLint>(regs.vb_base_instance);
-    const auto primitive_mode = MaxwellToGL::PrimitiveTopology(regs.draw.topology);
-    if (draw_setup.current_mode == Tegra::Engines::Maxwell3D::MMMEDrawMode::Indexed) {
-        const auto index_format = MaxwellToGL::IndexFormat(regs.index_array.format);
-        const auto count = regs.index_array.count;
-        const auto base_vertex = static_cast<GLint>(regs.vb_element_base);
-        const auto index_buffer_ptr = reinterpret_cast<const void*>(index_buffer_offset);
-        if (num_instances > 1) {
-            glDrawElementsInstancedBaseVertexBaseInstance(primitive_mode, count, index_format,
-                                                          index_buffer_ptr, num_instances,
-                                                          base_vertex, base_instance);
-        } else {
-            glDrawElementsBaseVertex(primitive_mode, count, index_format, index_buffer_ptr,
-                                     base_vertex);
-        }
+    DrawParams draw_call;
+    draw_call.is_indexed =
+        draw_setup.current_mode == Tegra::Engines::Maxwell3D::MMMEDrawMode::Indexed;
+    draw_call.num_instances = static_cast<GLint>(draw_setup.instance_count);
+    draw_call.base_instance = static_cast<GLint>(regs.vb_base_instance);
+    draw_call.is_instanced = draw_setup.instance_count > 1;
+    draw_call.primitive_mode = MaxwellToGL::PrimitiveTopology(regs.draw.topology);
+    if (draw_call.is_indexed) {
+        draw_call.count = static_cast<GLint>(regs.index_array.count);
+        draw_call.base_vertex = static_cast<GLint>(regs.vb_element_base);
+        draw_call.index_format = MaxwellToGL::IndexFormat(regs.index_array.format);
+        draw_call.index_buffer_offset = index_buffer_offset;
     } else {
-        const auto count = regs.vertex_buffer.count;
-        const auto vertex_first = regs.vertex_buffer.first;
-        if (num_instances > 1) {
-            glDrawArraysInstancedBaseInstance(primitive_mode, vertex_first, count, num_instances,
-                                              base_instance);
-        } else {
-            glDrawArrays(primitive_mode, vertex_first, count);
-        }
+        draw_call.count = static_cast<GLint>(regs.vertex_buffer.count);
+        draw_call.base_vertex = static_cast<GLint>(regs.vertex_buffer.first);
     }
+    draw_call.DispatchDraw();
 
     accelerate_draw = AccelDraw::Disabled;
     maxwell3d.dirty.memory_general = false;
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.h b/src/video_core/renderer_opengl/gl_rasterizer.h
index 63a914ff9..b4e21b9de 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer.h
@@ -138,6 +138,7 @@ private:
     void SetupGlobalMemory(const GLShader::GlobalMemoryEntry& entry, GPUVAddr gpu_addr,
                            std::size_t size);
 
+    /// Syncs all the state, shaders, render targets and textures setting before a draw call.
     void DrawPrelude();
 
     /// Configures the current textures to use for the draw command. Returns shaders texture buffer
@@ -254,8 +255,6 @@ private:
 
     GLintptr SetupIndexBuffer();
 
-    DrawParameters SetupDraw(GLintptr index_buffer_offset);
-
     GLintptr index_buffer_offset;
 
     void SetupShaders(GLenum primitive_mode);