From a6b88e85bfb14c45345f6443b54d15a61e3975d5 Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Tue, 17 Aug 2021 00:12:52 +0200
Subject: Renderer: Implement Bicubic and ScaleForce filters.

---
 src/video_core/renderer_opengl/renderer_opengl.cpp | 27 ++++++++++++++++++++--
 src/video_core/renderer_opengl/renderer_opengl.h   |  4 +++-
 2 files changed, 28 insertions(+), 3 deletions(-)

(limited to 'src/video_core/renderer_opengl')

diff --git a/src/video_core/renderer_opengl/renderer_opengl.cpp b/src/video_core/renderer_opengl/renderer_opengl.cpp
index 0f7b69c6d..71a5e3adf 100644
--- a/src/video_core/renderer_opengl/renderer_opengl.cpp
+++ b/src/video_core/renderer_opengl/renderer_opengl.cpp
@@ -21,7 +21,9 @@
 #include "core/memory.h"
 #include "core/perf_stats.h"
 #include "core/telemetry_session.h"
+#include "video_core/host_shaders/opengl_present_bicubic_frag.h"
 #include "video_core/host_shaders/opengl_present_frag.h"
+#include "video_core/host_shaders/opengl_present_scaleforce_frag.h"
 #include "video_core/host_shaders/opengl_present_vert.h"
 #include "video_core/renderer_opengl/gl_rasterizer.h"
 #include "video_core/renderer_opengl/gl_shader_manager.h"
@@ -252,7 +254,11 @@ void RendererOpenGL::LoadColorToActiveGLTexture(u8 color_r, u8 color_g, u8 color
 void RendererOpenGL::InitOpenGLObjects() {
     // Create shader programs
     present_vertex = CreateProgram(HostShaders::OPENGL_PRESENT_VERT, GL_VERTEX_SHADER);
-    present_fragment = CreateProgram(HostShaders::OPENGL_PRESENT_FRAG, GL_FRAGMENT_SHADER);
+    present_bilinear_fragment = CreateProgram(HostShaders::OPENGL_PRESENT_FRAG, GL_FRAGMENT_SHADER);
+    present_bicubic_fragment =
+        CreateProgram(HostShaders::OPENGL_PRESENT_BICUBIC_FRAG, GL_FRAGMENT_SHADER);
+    present_scaleforce_fragment =
+        CreateProgram(HostShaders::OPENGL_PRESENT_SCALEFORCE_FRAG, GL_FRAGMENT_SHADER);
 
     // Generate presentation sampler
     present_sampler.Create();
@@ -337,7 +343,24 @@ void RendererOpenGL::DrawScreen(const Layout::FramebufferLayout& layout) {
     // Set projection matrix
     const std::array ortho_matrix =
         MakeOrthographicMatrix(static_cast<float>(layout.width), static_cast<float>(layout.height));
-    program_manager.BindPresentPrograms(present_vertex.handle, present_fragment.handle);
+
+    GLuint fragment_handle;
+    const auto filter = Settings::values.scaling_filter.GetValue();
+    switch (filter) {
+    case Settings::ScalingFilter::Bilinear:
+        fragment_handle = present_bilinear_fragment.handle;
+        break;
+    case Settings::ScalingFilter::Bicubic:
+        fragment_handle = present_bicubic_fragment.handle;
+        break;
+    case Settings::ScalingFilter::ScaleForce:
+        fragment_handle = present_scaleforce_fragment.handle;
+        break;
+    default:
+        fragment_handle = present_bilinear_fragment.handle;
+        break;
+    }
+    program_manager.BindPresentPrograms(present_vertex.handle, fragment_handle);
     glProgramUniformMatrix3x2fv(present_vertex.handle, ModelViewMatrixLocation, 1, GL_FALSE,
                                 ortho_matrix.data());
 
diff --git a/src/video_core/renderer_opengl/renderer_opengl.h b/src/video_core/renderer_opengl/renderer_opengl.h
index d455f572f..bf3d3502c 100644
--- a/src/video_core/renderer_opengl/renderer_opengl.h
+++ b/src/video_core/renderer_opengl/renderer_opengl.h
@@ -111,7 +111,9 @@ private:
     OGLSampler present_sampler;
     OGLBuffer vertex_buffer;
     OGLProgram present_vertex;
-    OGLProgram present_fragment;
+    OGLProgram present_bilinear_fragment;
+    OGLProgram present_bicubic_fragment;
+    OGLProgram present_scaleforce_fragment;
     OGLFramebuffer screenshot_framebuffer;
 
     // GPU address of the vertex buffer
-- 
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