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Renderers: Unify post processing filter shaders

This commit is contained in:
ameerj 2021-09-09 23:01:39 -04:00 committed by Fernando Sahmkow
parent 29710f3250
commit ae8d19d17e
7 changed files with 36 additions and 211 deletions
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6
src/video_core/host_shaders/CMakeLists.txt
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@ -6,15 +6,13 @@ set(SHADER_FILES
convert_float_to_depth.frag
full_screen_triangle.vert
opengl_copy_bc4.comp
opengl_present_scaleforce.frag
opengl_present_bicubic.frag
opengl_present.frag
opengl_present.vert
pitch_unswizzle.comp
present_scaleforce.frag
present_bicubic.frag
vulkan_blit_color_float.frag
vulkan_blit_depth_stencil.frag
vulkan_present_bicubic.frag
vulkan_present_scaleforce.frag
vulkan_present.frag
vulkan_present.vert
vulkan_quad_indexed.comp

135
src/video_core/host_shaders/opengl_present_scaleforce.frag
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@ -1,135 +0,0 @@
// from https://github.com/BreadFish64/ScaleFish/tree/master/scale_force
// MIT License
//
// Copyright (c) 2020 BreadFish64
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
precision mediump float;
layout (location = 0) in vec2 tex_coord;
layout (location = 0) out vec4 frag_color;
layout (binding = 1) uniform sampler2D input_texture;
vec2 tex_size;
vec2 inv_tex_size;
vec4 cubic(float v) {
vec3 n = vec3(1.0, 2.0, 3.0) - v;
vec3 s = n * n * n;
float x = s.x;
float y = s.y - 4.0 * s.x;
float z = s.z - 4.0 * s.y + 6.0 * s.x;
float w = 6.0 - x - y - z;
return vec4(x, y, z, w) / 6.0;
}
// Bicubic interpolation
vec4 textureBicubic(vec2 tex_coords) {
tex_coords = tex_coords * tex_size - 0.5;
vec2 fxy = modf(tex_coords, tex_coords);
vec4 xcubic = cubic(fxy.x);
vec4 ycubic = cubic(fxy.y);
vec4 c = tex_coords.xxyy + vec2(-0.5, +1.5).xyxy;
vec4 s = vec4(xcubic.xz + xcubic.yw, ycubic.xz + ycubic.yw);
vec4 offset = c + vec4(xcubic.yw, ycubic.yw) / s;
offset *= inv_tex_size.xxyy;
vec4 sample0 = textureLod(input_texture, offset.xz, 0.0);
vec4 sample1 = textureLod(input_texture, offset.yz, 0.0);
vec4 sample2 = textureLod(input_texture, offset.xw, 0.0);
vec4 sample3 = textureLod(input_texture, offset.yw, 0.0);
float sx = s.x / (s.x + s.y);
float sy = s.z / (s.z + s.w);
return mix(mix(sample3, sample2, sx), mix(sample1, sample0, sx), sy);
}
mat4x3 center_matrix;
vec4 center_alpha;
// Finds the distance between four colors and cc in YCbCr space
vec4 ColorDist(vec4 A, vec4 B, vec4 C, vec4 D) {
// https://en.wikipedia.org/wiki/YCbCr#ITU-R_BT.2020_conversion
const vec3 K = vec3(0.2627, 0.6780, 0.0593);
const float LUMINANCE_WEIGHT = .6;
const mat3 YCBCR_MATRIX =
mat3(K * LUMINANCE_WEIGHT, -.5 * K.r / (1.0 - K.b), -.5 * K.g / (1.0 - K.b), .5, .5,
-.5 * K.g / (1.0 - K.r), -.5 * K.b / (1.0 - K.r));
mat4x3 colors = mat4x3(A.rgb, B.rgb, C.rgb, D.rgb) - center_matrix;
mat4x3 YCbCr = YCBCR_MATRIX * colors;
vec4 color_dist = vec3(1.0) * YCbCr;
color_dist *= color_dist;
vec4 alpha = vec4(A.a, B.a, C.a, D.a);
return sqrt((color_dist + abs(center_alpha - alpha)) * alpha * center_alpha);
}
void main() {
vec4 bl = textureLodOffset(input_texture, tex_coord, 0.0, ivec2(-1, -1));
vec4 bc = textureLodOffset(input_texture, tex_coord, 0.0, ivec2(0, -1));
vec4 br = textureLodOffset(input_texture, tex_coord, 0.0, ivec2(1, -1));
vec4 cl = textureLodOffset(input_texture, tex_coord, 0.0, ivec2(-1, 0));
vec4 cc = textureLod(input_texture, tex_coord, 0.0);
vec4 cr = textureLodOffset(input_texture, tex_coord, 0.0, ivec2(1, 0));
vec4 tl = textureLodOffset(input_texture, tex_coord, 0.0, ivec2(-1, 1));
vec4 tc = textureLodOffset(input_texture, tex_coord, 0.0, ivec2(0, 1));
vec4 tr = textureLodOffset(input_texture, tex_coord, 0.0, ivec2(1, 1));
tex_size = vec2(textureSize(input_texture, 0));
inv_tex_size = 1.0 / tex_size;
center_matrix = mat4x3(cc.rgb, cc.rgb, cc.rgb, cc.rgb);
center_alpha = cc.aaaa;
vec4 offset_tl = ColorDist(tl, tc, tr, cr);
vec4 offset_br = ColorDist(br, bc, bl, cl);
// Calculate how different cc is from the texels around it
float total_dist = dot(offset_tl + offset_br, vec4(1.0));
// Add together all the distances with direction taken into account
vec4 tmp = offset_tl - offset_br;
vec2 total_offset = tmp.wy + tmp.zz + vec2(-tmp.x, tmp.x);
if (total_dist == 0.0) {
// Doing bicubic filtering just past the edges where the offset is 0 causes black floaters
// and it doesn't really matter which filter is used when the colors aren't changing.
frag_color = vec4(cc.rgb, 1.0f);
} else {
// When the image has thin points, they tend to split apart.
// This is because the texels all around are different
// and total_offset reaches into clear areas.
// This works pretty well to keep the offset in bounds for these cases.
float clamp_val = length(total_offset) / total_dist;
vec2 final_offset = clamp(total_offset, -clamp_val, clamp_val) * inv_tex_size;
frag_color = vec4(textureBicubic(tex_coord - final_offset).rgb, 1.0f);
}
}

13
src/video_core/host_shaders/opengl_present_bicubic.frag → src/video_core/host_shaders/present_bicubic.frag
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@ -4,11 +4,22 @@
#version 460 core
#ifdef VULKAN
#define BINDING_COLOR_TEXTURE 1
#else // ^^^ Vulkan ^^^ // vvv OpenGL vvv
#define BINDING_COLOR_TEXTURE 0
#endif
layout (location = 0) in vec2 frag_tex_coord;
layout (location = 0) out vec4 color;
layout (binding = 1) uniform sampler2D color_texture;
layout (binding = BINDING_COLOR_TEXTURE) uniform sampler2D color_texture;
vec4 cubic(float v) {
vec4 n = vec4(1.0, 2.0, 3.0, 4.0) - v;

20
src/video_core/host_shaders/vulkan_present_scaleforce.frag → src/video_core/host_shaders/present_scaleforce.frag
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@ -1,7 +1,3 @@
#version 320 es
// from https://github.com/BreadFish64/ScaleFish/tree/master/scale_force
// MIT License
//
// Copyright (c) 2020 BreadFish64
@ -24,13 +20,25 @@
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
precision mediump float;
// Adapted from https://github.com/BreadFish64/ScaleFish/tree/master/scaleforce
#version 460
#ifdef VULKAN
#define BINDING_COLOR_TEXTURE 1
#else // ^^^ Vulkan ^^^ // vvv OpenGL vvv
#define BINDING_COLOR_TEXTURE 0
#endif
layout (location = 0) in vec2 tex_coord;
layout (location = 0) out vec4 frag_color;
layout (binding = 1) uniform sampler2D input_texture;
layout (binding = BINDING_COLOR_TEXTURE) uniform sampler2D input_texture;
vec2 tex_size;
vec2 inv_tex_size;

56
src/video_core/host_shaders/vulkan_present_bicubic.frag
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@ -1,56 +0,0 @@
// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#version 460 core
layout (location = 0) in vec2 frag_tex_coord;
layout (location = 0) out vec4 color;
layout (binding = 1) uniform sampler2D color_texture;
vec4 cubic(float v) {
vec4 n = vec4(1.0, 2.0, 3.0, 4.0) - v;
vec4 s = n * n * n;
float x = s.x;
float y = s.y - 4.0 * s.x;
float z = s.z - 4.0 * s.y + 6.0 * s.x;
float w = 6.0 - x - y - z;
return vec4(x, y, z, w) * (1.0 / 6.0);
}
vec4 textureBicubic( sampler2D textureSampler, vec2 texCoords ) {
vec2 texSize = textureSize(textureSampler, 0);
vec2 invTexSize = 1.0 / texSize;
texCoords = texCoords * texSize - 0.5;
vec2 fxy = fract(texCoords);
texCoords -= fxy;
vec4 xcubic = cubic(fxy.x);
vec4 ycubic = cubic(fxy.y);
vec4 c = texCoords.xxyy + vec2(-0.5, +1.5).xyxy;
vec4 s = vec4(xcubic.xz + xcubic.yw, ycubic.xz + ycubic.yw);
vec4 offset = c + vec4(xcubic.yw, ycubic.yw) / s;
offset *= invTexSize.xxyy;
vec4 sample0 = texture(textureSampler, offset.xz);
vec4 sample1 = texture(textureSampler, offset.yz);
vec4 sample2 = texture(textureSampler, offset.xw);
vec4 sample3 = texture(textureSampler, offset.yw);
float sx = s.x / (s.x + s.y);
float sy = s.z / (s.z + s.w);
return mix(mix(sample3, sample2, sx), mix(sample1, sample0, sx), sy);
}
void main() {
color = vec4(textureBicubic(color_texture, frag_tex_coord).rgb, 1.0f);
}

9
src/video_core/renderer_opengl/renderer_opengl.cpp
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@ -21,10 +21,10 @@
#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/host_shaders/present_bicubic_frag.h"
#include "video_core/host_shaders/present_scaleforce_frag.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/gl_shader_manager.h"
#include "video_core/renderer_opengl/gl_shader_util.h"
@ -255,10 +255,9 @@ void RendererOpenGL::InitOpenGLObjects() {
// Create shader programs
present_vertex = CreateProgram(HostShaders::OPENGL_PRESENT_VERT, GL_VERTEX_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_bicubic_fragment = CreateProgram(HostShaders::PRESENT_BICUBIC_FRAG, GL_FRAGMENT_SHADER);
present_scaleforce_fragment =
CreateProgram(HostShaders::OPENGL_PRESENT_SCALEFORCE_FRAG, GL_FRAGMENT_SHADER);
CreateProgram(HostShaders::PRESENT_SCALEFORCE_FRAG, GL_FRAGMENT_SHADER);
// Generate presentation sampler
present_sampler.Create();

8
src/video_core/renderer_vulkan/vk_blit_screen.cpp
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@ -17,9 +17,9 @@
#include "core/frontend/emu_window.h"
#include "core/memory.h"
#include "video_core/gpu.h"
#include "video_core/host_shaders/vulkan_present_bicubic_frag_spv.h"
#include "video_core/host_shaders/present_bicubic_frag_spv.h"
#include "video_core/host_shaders/present_scaleforce_frag_spv.h"
#include "video_core/host_shaders/vulkan_present_frag_spv.h"
#include "video_core/host_shaders/vulkan_present_scaleforce_frag_spv.h"
#include "video_core/host_shaders/vulkan_present_vert_spv.h"
#include "video_core/renderer_vulkan/renderer_vulkan.h"
#include "video_core/renderer_vulkan/vk_blit_screen.h"
@ -342,8 +342,8 @@ void VKBlitScreen::RefreshResources(const Tegra::FramebufferConfig& framebuffer)
void VKBlitScreen::CreateShaders() {
vertex_shader = BuildShader(device, VULKAN_PRESENT_VERT_SPV);
bilinear_fragment_shader = BuildShader(device, VULKAN_PRESENT_FRAG_SPV);
bicubic_fragment_shader = BuildShader(device, VULKAN_PRESENT_BICUBIC_FRAG_SPV);
scaleforce_fragment_shader = BuildShader(device, VULKAN_PRESENT_SCALEFORCE_FRAG_SPV);
bicubic_fragment_shader = BuildShader(device, PRESENT_BICUBIC_FRAG_SPV);
scaleforce_fragment_shader = BuildShader(device, PRESENT_SCALEFORCE_FRAG_SPV);
}
void VKBlitScreen::CreateSemaphores() {