// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "video_core/framebuffer_config.h"
#include "video_core/renderer_opengl/gl_blit_screen.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/present/fsr.h"
#include "video_core/renderer_opengl/present/fxaa.h"
#include "video_core/renderer_opengl/present/layer.h"
#include "video_core/renderer_opengl/present/present_uniforms.h"
#include "video_core/renderer_opengl/present/smaa.h"
#include "video_core/surface.h"
#include "video_core/textures/decoders.h"
namespace OpenGL {
Layer::Layer(RasterizerOpenGL& rasterizer_, Tegra::MaxwellDeviceMemoryManager& device_memory_)
: rasterizer(rasterizer_), device_memory(device_memory_) {
// Allocate textures for the screen
framebuffer_texture.resource.Create(GL_TEXTURE_2D);
const GLuint texture = framebuffer_texture.resource.handle;
glTextureStorage2D(texture, 1, GL_RGBA8, 1, 1);
// Clear screen to black
const u8 framebuffer_data[4] = {0, 0, 0, 0};
glClearTexImage(framebuffer_texture.resource.handle, 0, GL_RGBA, GL_UNSIGNED_BYTE,
framebuffer_data);
}
Layer::~Layer() = default;
GLuint Layer::ConfigureDraw(std::array<GLfloat, 3 * 2>& out_matrix,
std::array<ScreenRectVertex, 4>& out_vertices,
ProgramManager& program_manager,
const Tegra::FramebufferConfig& framebuffer,
const Layout::FramebufferLayout& layout) {
FramebufferTextureInfo info = PrepareRenderTarget(framebuffer);
auto crop = Tegra::NormalizeCrop(framebuffer, info.width, info.height);
GLuint texture = info.display_texture;
auto anti_aliasing = Settings::values.anti_aliasing.GetValue();
if (anti_aliasing != Settings::AntiAliasing::None) {
glEnablei(GL_SCISSOR_TEST, 0);
auto viewport_width = Settings::values.resolution_info.ScaleUp(framebuffer_texture.width);
auto viewport_height = Settings::values.resolution_info.ScaleUp(framebuffer_texture.height);
glScissorIndexed(0, 0, 0, viewport_width, viewport_height);
glViewportIndexedf(0, 0.0f, 0.0f, static_cast<GLfloat>(viewport_width),
static_cast<GLfloat>(viewport_height));
switch (anti_aliasing) {
case Settings::AntiAliasing::Fxaa:
CreateFXAA();
texture = fxaa->Draw(program_manager, info.display_texture);
break;
case Settings::AntiAliasing::Smaa:
default:
CreateSMAA();
texture = smaa->Draw(program_manager, info.display_texture);
break;
}
}
glDisablei(GL_SCISSOR_TEST, 0);
if (Settings::values.scaling_filter.GetValue() == Settings::ScalingFilter::Fsr) {
if (!fsr || fsr->NeedsRecreation(layout.screen)) {
fsr = std::make_unique<FSR>(layout.screen.GetWidth(), layout.screen.GetHeight());
}
texture = fsr->Draw(program_manager, texture, info.scaled_width, info.scaled_height, crop);
crop = {0, 0, 1, 1};
}
out_matrix =
MakeOrthographicMatrix(static_cast<float>(layout.width), static_cast<float>(layout.height));
// Map the coordinates to the screen.
const auto& screen = layout.screen;
const auto x = screen.left;
const auto y = screen.top;
const auto w = screen.GetWidth();
const auto h = screen.GetHeight();
out_vertices[0] = ScreenRectVertex(x, y, crop.left, crop.top);
out_vertices[1] = ScreenRectVertex(x + w, y, crop.right, crop.top);
out_vertices[2] = ScreenRectVertex(x, y + h, crop.left, crop.bottom);
out_vertices[3] = ScreenRectVertex(x + w, y + h, crop.right, crop.bottom);
return texture;
}
FramebufferTextureInfo Layer::PrepareRenderTarget(const Tegra::FramebufferConfig& framebuffer) {
// If framebuffer is provided, reload it from memory to a texture
if (framebuffer_texture.width != static_cast<GLsizei>(framebuffer.width) ||
framebuffer_texture.height != static_cast<GLsizei>(framebuffer.height) ||
framebuffer_texture.pixel_format != framebuffer.pixel_format ||
gl_framebuffer_data.empty()) {
// Reallocate texture if the framebuffer size has changed.
// This is expected to not happen very often and hence should not be a
// performance problem.
ConfigureFramebufferTexture(framebuffer);
}
// Load the framebuffer from memory if needed
return LoadFBToScreenInfo(framebuffer);
}
FramebufferTextureInfo Layer::LoadFBToScreenInfo(const Tegra::FramebufferConfig& framebuffer) {
const VAddr framebuffer_addr{framebuffer.address + framebuffer.offset};
const auto accelerated_info =
rasterizer.AccelerateDisplay(framebuffer, framebuffer_addr, framebuffer.stride);
if (accelerated_info) {
return *accelerated_info;
}
// Reset the screen info's display texture to its own permanent texture
FramebufferTextureInfo info{};
info.display_texture = framebuffer_texture.resource.handle;
info.width = framebuffer.width;
info.height = framebuffer.height;
info.scaled_width = framebuffer.width;
info.scaled_height = framebuffer.height;
// TODO(Rodrigo): Read this from HLE
constexpr u32 block_height_log2 = 4;
const auto pixel_format{
VideoCore::Surface::PixelFormatFromGPUPixelFormat(framebuffer.pixel_format)};
const u32 bytes_per_pixel{VideoCore::Surface::BytesPerBlock(pixel_format)};
const u64 size_in_bytes{Tegra::Texture::CalculateSize(
true, bytes_per_pixel, framebuffer.stride, framebuffer.height, 1, block_height_log2, 0)};
const u8* const host_ptr{device_memory.GetPointer<u8>(framebuffer_addr)};
const std::span<const u8> input_data(host_ptr, size_in_bytes);
Tegra::Texture::UnswizzleTexture(gl_framebuffer_data, input_data, bytes_per_pixel,
framebuffer.width, framebuffer.height, 1, block_height_log2,
0);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glPixelStorei(GL_UNPACK_ROW_LENGTH, static_cast<GLint>(framebuffer.stride));
// Update existing texture
// TODO: Test what happens on hardware when you change the framebuffer dimensions so that
// they differ from the LCD resolution.
// TODO: Applications could theoretically crash yuzu here by specifying too large
// framebuffer sizes. We should make sure that this cannot happen.
glTextureSubImage2D(framebuffer_texture.resource.handle, 0, 0, 0, framebuffer.width,
framebuffer.height, framebuffer_texture.gl_format,
framebuffer_texture.gl_type, gl_framebuffer_data.data());
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
return info;
}
void Layer::ConfigureFramebufferTexture(const Tegra::FramebufferConfig& framebuffer) {
framebuffer_texture.width = framebuffer.width;
framebuffer_texture.height = framebuffer.height;
framebuffer_texture.pixel_format = framebuffer.pixel_format;
const auto pixel_format{
VideoCore::Surface::PixelFormatFromGPUPixelFormat(framebuffer.pixel_format)};
const u32 bytes_per_pixel{VideoCore::Surface::BytesPerBlock(pixel_format)};
gl_framebuffer_data.resize(framebuffer_texture.width * framebuffer_texture.height *
bytes_per_pixel);
GLint internal_format;
switch (framebuffer.pixel_format) {
case Service::android::PixelFormat::Rgba8888:
internal_format = GL_RGBA8;
framebuffer_texture.gl_format = GL_RGBA;
framebuffer_texture.gl_type = GL_UNSIGNED_INT_8_8_8_8_REV;
break;
case Service::android::PixelFormat::Rgb565:
internal_format = GL_RGB565;
framebuffer_texture.gl_format = GL_RGB;
framebuffer_texture.gl_type = GL_UNSIGNED_SHORT_5_6_5;
break;
default:
internal_format = GL_RGBA8;
framebuffer_texture.gl_format = GL_RGBA;
framebuffer_texture.gl_type = GL_UNSIGNED_INT_8_8_8_8_REV;
// UNIMPLEMENTED_MSG("Unknown framebuffer pixel format: {}",
// static_cast<u32>(framebuffer.pixel_format));
break;
}
framebuffer_texture.resource.Release();
framebuffer_texture.resource.Create(GL_TEXTURE_2D);
glTextureStorage2D(framebuffer_texture.resource.handle, 1, internal_format,
framebuffer_texture.width, framebuffer_texture.height);
fxaa.reset();
smaa.reset();
}
void Layer::CreateFXAA() {
smaa.reset();
if (!fxaa) {
fxaa = std::make_unique<FXAA>(
Settings::values.resolution_info.ScaleUp(framebuffer_texture.width),
Settings::values.resolution_info.ScaleUp(framebuffer_texture.height));
}
}
void Layer::CreateSMAA() {
fxaa.reset();
if (!smaa) {
smaa = std::make_unique<SMAA>(
Settings::values.resolution_info.ScaleUp(framebuffer_texture.width),
Settings::values.resolution_info.ScaleUp(framebuffer_texture.height));
}
}
} // namespace OpenGL
