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suyu/src/video_core/renderer_opengl/renderer_opengl.cpp
James Rowe 282adfc70b Frontend/GPU: Refactor context management 
Changes the GraphicsContext to be managed by the GPU core. This
eliminates the need for the frontends to fool around with tricky
MakeCurrent/DoneCurrent calls that are dependent on the settings (such
as async gpu option).

This also refactors out the need to use QWidget::fromWindowContainer as
that caused issues with focus and input handling. Now we use a regular
QWidget and just access the native windowHandle() directly.

Another change is removing the debug tool setting in FrameMailbox.
Instead of trying to block the frontend until a new frame is ready, the
core will now take over presentation and draw directly to the window if
the renderer detects that its hooked by NSight or RenderDoc

Lastly, since it was in the way, I removed ScopeAcquireWindowContext and
replaced it with a simple subclass in GraphicsContext that achieves the
same result
2020-03-24 21:03:42 -06:00

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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cstddef>
#include <cstdlib>
#include <cstring>
#include <memory>
#include <glad/glad.h>
#include "common/assert.h"
#include "common/logging/log.h"
#include "common/microprofile.h"
#include "common/telemetry.h"
#include "core/core.h"
#include "core/core_timing.h"
#include "core/frontend/emu_window.h"
#include "core/memory.h"
#include "core/perf_stats.h"
#include "core/settings.h"
#include "core/telemetry_session.h"
#include "video_core/morton.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/gl_shader_manager.h"
#include "video_core/renderer_opengl/renderer_opengl.h"
namespace OpenGL {
namespace {
constexpr std::size_t SWAP_CHAIN_SIZE = 3;
struct Frame {
u32 width{}; /// Width of the frame (to detect resize)
u32 height{}; /// Height of the frame
bool color_reloaded{}; /// Texture attachment was recreated (ie: resized)
OpenGL::OGLRenderbuffer color{}; /// Buffer shared between the render/present FBO
OpenGL::OGLFramebuffer render{}; /// FBO created on the render thread
OpenGL::OGLFramebuffer present{}; /// FBO created on the present thread
GLsync render_fence{}; /// Fence created on the render thread
GLsync present_fence{}; /// Fence created on the presentation thread
bool is_srgb{}; /// Framebuffer is sRGB or RGB
};
constexpr char VERTEX_SHADER[] = R"(
#version 430 core
out gl_PerVertex {
vec4 gl_Position;
};
layout (location = 0) in vec2 vert_position;
layout (location = 1) in vec2 vert_tex_coord;
layout (location = 0) out vec2 frag_tex_coord;
// This is a truncated 3x3 matrix for 2D transformations:
// The upper-left 2x2 submatrix performs scaling/rotation/mirroring.
// The third column performs translation.
// The third row could be used for projection, which we don't need in 2D. It hence is assumed to
// implicitly be [0, 0, 1]
layout (location = 0) uniform mat3x2 modelview_matrix;
void main() {
// Multiply input position by the rotscale part of the matrix and then manually translate by
// the last column. This is equivalent to using a full 3x3 matrix and expanding the vector
// to `vec3(vert_position.xy, 1.0)`
gl_Position = vec4(mat2(modelview_matrix) * vert_position + modelview_matrix[2], 0.0, 1.0);
frag_tex_coord = vert_tex_coord;
}
)";
constexpr char FRAGMENT_SHADER[] = R"(
#version 430 core
layout (location = 0) in vec2 frag_tex_coord;
layout (location = 0) out vec4 color;
layout (binding = 0) uniform sampler2D color_texture;
void main() {
color = vec4(texture(color_texture, frag_tex_coord).rgb, 1.0f);
}
)";
constexpr GLint PositionLocation = 0;
constexpr GLint TexCoordLocation = 1;
constexpr GLint ModelViewMatrixLocation = 0;
struct ScreenRectVertex {
constexpr ScreenRectVertex(u32 x, u32 y, GLfloat u, GLfloat v)
: position{{static_cast<GLfloat>(x), static_cast<GLfloat>(y)}}, tex_coord{{u, v}} {}
std::array<GLfloat, 2> position;
std::array<GLfloat, 2> tex_coord;
};
/// Returns true if any debug tool is attached
bool HasDebugTool() {
const bool nsight = std::getenv("NVTX_INJECTION64_PATH") || std::getenv("NSIGHT_LAUNCHED");
if (nsight) {
return true;
}
GLint num_extensions;
glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
for (GLuint index = 0; index < static_cast<GLuint>(num_extensions); ++index) {
const auto name = reinterpret_cast<const char*>(glGetStringi(GL_EXTENSIONS, index));
if (!std::strcmp(name, "GL_EXT_debug_tool")) {
return true;
}
}
return false;
}
/**
* Defines a 1:1 pixel ortographic projection matrix with (0,0) on the top-left
* corner and (width, height) on the lower-bottom.
*
* The projection part of the matrix is trivial, hence these operations are represented
* by a 3x2 matrix.
*/
std::array<GLfloat, 3 * 2> MakeOrthographicMatrix(float width, float height) {
std::array<GLfloat, 3 * 2> matrix; // Laid out in column-major order
// clang-format off
matrix[0] = 2.f / width; matrix[2] = 0.f; matrix[4] = -1.f;
matrix[1] = 0.f; matrix[3] = -2.f / height; matrix[5] = 1.f;
// Last matrix row is implicitly assumed to be [0, 0, 1].
// clang-format on
return matrix;
}
const char* GetSource(GLenum source) {
switch (source) {
case GL_DEBUG_SOURCE_API:
return "API";
case GL_DEBUG_SOURCE_WINDOW_SYSTEM:
return "WINDOW_SYSTEM";
case GL_DEBUG_SOURCE_SHADER_COMPILER:
return "SHADER_COMPILER";
case GL_DEBUG_SOURCE_THIRD_PARTY:
return "THIRD_PARTY";
case GL_DEBUG_SOURCE_APPLICATION:
return "APPLICATION";
case GL_DEBUG_SOURCE_OTHER:
return "OTHER";
default:
UNREACHABLE();
return "Unknown source";
}
}
const char* GetType(GLenum type) {
switch (type) {
case GL_DEBUG_TYPE_ERROR:
return "ERROR";
case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR:
return "DEPRECATED_BEHAVIOR";
case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR:
return "UNDEFINED_BEHAVIOR";
case GL_DEBUG_TYPE_PORTABILITY:
return "PORTABILITY";
case GL_DEBUG_TYPE_PERFORMANCE:
return "PERFORMANCE";
case GL_DEBUG_TYPE_OTHER:
return "OTHER";
case GL_DEBUG_TYPE_MARKER:
return "MARKER";
default:
UNREACHABLE();
return "Unknown type";
}
}
void APIENTRY DebugHandler(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length,
const GLchar* message, const void* user_param) {
const char format[] = "{} {} {}: {}";
const char* const str_source = GetSource(source);
const char* const str_type = GetType(type);
switch (severity) {
case GL_DEBUG_SEVERITY_HIGH:
LOG_CRITICAL(Render_OpenGL, format, str_source, str_type, id, message);
break;
case GL_DEBUG_SEVERITY_MEDIUM:
LOG_WARNING(Render_OpenGL, format, str_source, str_type, id, message);
break;
case GL_DEBUG_SEVERITY_NOTIFICATION:
case GL_DEBUG_SEVERITY_LOW:
LOG_DEBUG(Render_OpenGL, format, str_source, str_type, id, message);
break;
}
}
} // Anonymous namespace
/**
* For smooth Vsync rendering, we want to always present the latest frame that the core generates,
* but also make sure that rendering happens at the pace that the frontend dictates. This is a
* helper class that the renderer uses to sync frames between the render thread and the presentation
* thread
*/
class FrameMailbox {
public:
std::mutex swap_chain_lock;
std::condition_variable present_cv;
std::array<Frame, SWAP_CHAIN_SIZE> swap_chain{};
std::queue<Frame*> free_queue;
std::deque<Frame*> present_queue;
Frame* previous_frame{};
FrameMailbox() {
for (auto& frame : swap_chain) {
free_queue.push(&frame);
}
}
~FrameMailbox() {
// lock the mutex and clear out the present and free_queues and notify any people who are
// blocked to prevent deadlock on shutdown
std::scoped_lock lock{swap_chain_lock};
std::queue<Frame*>().swap(free_queue);
present_queue.clear();
present_cv.notify_all();
}
void ReloadPresentFrame(Frame* frame, u32 height, u32 width) {
frame->present.Release();
frame->present.Create();
GLint previous_draw_fbo{};
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &previous_draw_fbo);
glBindFramebuffer(GL_FRAMEBUFFER, frame->present.handle);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER,
frame->color.handle);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
LOG_CRITICAL(Render_OpenGL, "Failed to recreate present FBO!");
}
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, previous_draw_fbo);
frame->color_reloaded = false;
}
void ReloadRenderFrame(Frame* frame, u32 width, u32 height) {
// Recreate the color texture attachment
frame->color.Release();
frame->color.Create();
const GLenum internal_format = frame->is_srgb ? GL_SRGB8 : GL_RGB8;
glNamedRenderbufferStorage(frame->color.handle, internal_format, width, height);
// Recreate the FBO for the render target
frame->render.Release();
frame->render.Create();
glBindFramebuffer(GL_FRAMEBUFFER, frame->render.handle);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER,
frame->color.handle);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
LOG_CRITICAL(Render_OpenGL, "Failed to recreate render FBO!");
}
frame->width = width;
frame->height = height;
frame->color_reloaded = true;
}
Frame* GetRenderFrame() {
std::unique_lock lock{swap_chain_lock};
// If theres no free frames, we will reuse the oldest render frame
if (free_queue.empty()) {
auto frame = present_queue.back();
present_queue.pop_back();
return frame;
}
Frame* frame = free_queue.front();
free_queue.pop();
return frame;
}
void ReleaseRenderFrame(Frame* frame) {
std::unique_lock lock{swap_chain_lock};
present_queue.push_front(frame);
present_cv.notify_one();
}
Frame* TryGetPresentFrame(int timeout_ms) {
std::unique_lock lock{swap_chain_lock};
// wait for new entries in the present_queue
present_cv.wait_for(lock, std::chrono::milliseconds(timeout_ms),
[&] { return !present_queue.empty(); });
if (present_queue.empty()) {
// timed out waiting for a frame to draw so return the previous frame
return previous_frame;
}
// free the previous frame and add it back to the free queue
if (previous_frame) {
free_queue.push(previous_frame);
}
// the newest entries are pushed to the front of the queue
Frame* frame = present_queue.front();
present_queue.pop_front();
// remove all old entries from the present queue and move them back to the free_queue
for (auto f : present_queue) {
free_queue.push(f);
}
present_queue.clear();
previous_frame = frame;
return frame;
}
};
RendererOpenGL::RendererOpenGL(Core::Frontend::EmuWindow& emu_window, Core::System& system,
Core::Frontend::GraphicsContext& context)
: VideoCore::RendererBase{emu_window}, emu_window{emu_window}, system{system}, frame_mailbox{},
has_debug_tool{HasDebugTool()}, context{context} {}
RendererOpenGL::~RendererOpenGL() = default;
MICROPROFILE_DEFINE(OpenGL_RenderFrame, "OpenGL", "Render Frame", MP_RGB(128, 128, 64));
MICROPROFILE_DEFINE(OpenGL_WaitPresent, "OpenGL", "Wait For Present", MP_RGB(128, 128, 128));
void RendererOpenGL::SwapBuffers(const Tegra::FramebufferConfig* framebuffer) {
if (!framebuffer) {
return;
}
PrepareRendertarget(framebuffer);
RenderScreenshot();
Frame* frame;
{
MICROPROFILE_SCOPE(OpenGL_WaitPresent);
frame = frame_mailbox->GetRenderFrame();
// Clean up sync objects before drawing
// INTEL driver workaround. We can't delete the previous render sync object until we are
// sure that the presentation is done
if (frame->present_fence) {
glClientWaitSync(frame->present_fence, 0, GL_TIMEOUT_IGNORED);
}
// delete the draw fence if the frame wasn't presented
if (frame->render_fence) {
glDeleteSync(frame->render_fence);
frame->render_fence = 0;
}
// wait for the presentation to be done
if (frame->present_fence) {
glWaitSync(frame->present_fence, 0, GL_TIMEOUT_IGNORED);
glDeleteSync(frame->present_fence);
frame->present_fence = 0;
}
}
{
MICROPROFILE_SCOPE(OpenGL_RenderFrame);
const auto& layout = render_window.GetFramebufferLayout();
// Recreate the frame if the size of the window has changed
if (layout.width != frame->width || layout.height != frame->height ||
screen_info.display_srgb != frame->is_srgb) {
LOG_DEBUG(Render_OpenGL, "Reloading render frame");
frame->is_srgb = screen_info.display_srgb;
frame_mailbox->ReloadRenderFrame(frame, layout.width, layout.height);
}
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, frame->render.handle);
DrawScreen(layout);
// Create a fence for the frontend to wait on and swap this frame to OffTex
frame->render_fence = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
glFlush();
frame_mailbox->ReleaseRenderFrame(frame);
m_current_frame++;
rasterizer->TickFrame();
}
render_window.PollEvents();
if (has_debug_tool) {
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
Present(0);
context.SwapBuffers();
}
}
void RendererOpenGL::PrepareRendertarget(const Tegra::FramebufferConfig* framebuffer) {
if (framebuffer) {
// If framebuffer is provided, reload it from memory to a texture
if (screen_info.texture.width != static_cast<GLsizei>(framebuffer->width) ||
screen_info.texture.height != static_cast<GLsizei>(framebuffer->height) ||
screen_info.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(screen_info.texture, *framebuffer);
}
// Load the framebuffer from memory, draw it to the screen, and swap buffers
LoadFBToScreenInfo(*framebuffer);
}
}
void RendererOpenGL::LoadFBToScreenInfo(const Tegra::FramebufferConfig& framebuffer) {
// Framebuffer orientation handling
framebuffer_transform_flags = framebuffer.transform_flags;
framebuffer_crop_rect = framebuffer.crop_rect;
const VAddr framebuffer_addr{framebuffer.address + framebuffer.offset};
if (rasterizer->AccelerateDisplay(framebuffer, framebuffer_addr, framebuffer.stride)) {
return;
}
// Reset the screen info's display texture to its own permanent texture
screen_info.display_texture = screen_info.texture.resource.handle;
const auto pixel_format{
VideoCore::Surface::PixelFormatFromGPUPixelFormat(framebuffer.pixel_format)};
const u32 bytes_per_pixel{VideoCore::Surface::GetBytesPerPixel(pixel_format)};
const u64 size_in_bytes{framebuffer.stride * framebuffer.height * bytes_per_pixel};
u8* const host_ptr{system.Memory().GetPointer(framebuffer_addr)};
rasterizer->FlushRegion(ToCacheAddr(host_ptr), size_in_bytes);
// TODO(Rodrigo): Read this from HLE
constexpr u32 block_height_log2 = 4;
VideoCore::MortonSwizzle(VideoCore::MortonSwizzleMode::MortonToLinear, pixel_format,
framebuffer.stride, block_height_log2, framebuffer.height, 0, 1, 1,
gl_framebuffer_data.data(), host_ptr);
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(screen_info.texture.resource.handle, 0, 0, 0, framebuffer.width,
framebuffer.height, screen_info.texture.gl_format,
screen_info.texture.gl_type, gl_framebuffer_data.data());
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
}
void RendererOpenGL::LoadColorToActiveGLTexture(u8 color_r, u8 color_g, u8 color_b, u8 color_a,
const TextureInfo& texture) {
const u8 framebuffer_data[4] = {color_a, color_b, color_g, color_r};
glClearTexImage(texture.resource.handle, 0, GL_RGBA, GL_UNSIGNED_BYTE, framebuffer_data);
}
void RendererOpenGL::InitOpenGLObjects() {
frame_mailbox = std::make_unique<FrameMailbox>();
glClearColor(Settings::values.bg_red, Settings::values.bg_green, Settings::values.bg_blue,
0.0f);
// Create shader programs
OGLShader vertex_shader;
vertex_shader.Create(VERTEX_SHADER, GL_VERTEX_SHADER);
OGLShader fragment_shader;
fragment_shader.Create(FRAGMENT_SHADER, GL_FRAGMENT_SHADER);
vertex_program.Create(true, false, vertex_shader.handle);
fragment_program.Create(true, false, fragment_shader.handle);
// Create program pipeline
program_manager.Create();
// Generate VBO handle for drawing
vertex_buffer.Create();
// Attach vertex data to VAO
glNamedBufferData(vertex_buffer.handle, sizeof(ScreenRectVertex) * 4, nullptr, GL_STREAM_DRAW);
// Allocate textures for the screen
screen_info.texture.resource.Create(GL_TEXTURE_2D);
const GLuint texture = screen_info.texture.resource.handle;
glTextureStorage2D(texture, 1, GL_RGBA8, 1, 1);
screen_info.display_texture = screen_info.texture.resource.handle;
// Clear screen to black
LoadColorToActiveGLTexture(0, 0, 0, 0, screen_info.texture);
}
void RendererOpenGL::AddTelemetryFields() {
const char* const gl_version{reinterpret_cast<char const*>(glGetString(GL_VERSION))};
const char* const gpu_vendor{reinterpret_cast<char const*>(glGetString(GL_VENDOR))};
const char* const gpu_model{reinterpret_cast<char const*>(glGetString(GL_RENDERER))};
LOG_INFO(Render_OpenGL, "GL_VERSION: {}", gl_version);
LOG_INFO(Render_OpenGL, "GL_VENDOR: {}", gpu_vendor);
LOG_INFO(Render_OpenGL, "GL_RENDERER: {}", gpu_model);
auto& telemetry_session = system.TelemetrySession();
telemetry_session.AddField(Telemetry::FieldType::UserSystem, "GPU_Vendor", gpu_vendor);
telemetry_session.AddField(Telemetry::FieldType::UserSystem, "GPU_Model", gpu_model);
telemetry_session.AddField(Telemetry::FieldType::UserSystem, "GPU_OpenGL_Version", gl_version);
}
void RendererOpenGL::CreateRasterizer() {
if (rasterizer) {
return;
}
rasterizer = std::make_unique<RasterizerOpenGL>(system, emu_window, screen_info,
program_manager, state_tracker);
}
void RendererOpenGL::ConfigureFramebufferTexture(TextureInfo& texture,
const Tegra::FramebufferConfig& framebuffer) {
texture.width = framebuffer.width;
texture.height = framebuffer.height;
texture.pixel_format = framebuffer.pixel_format;
const auto pixel_format{
VideoCore::Surface::PixelFormatFromGPUPixelFormat(framebuffer.pixel_format)};
const u32 bytes_per_pixel{VideoCore::Surface::GetBytesPerPixel(pixel_format)};
gl_framebuffer_data.resize(texture.width * texture.height * bytes_per_pixel);
GLint internal_format;
switch (framebuffer.pixel_format) {
case Tegra::FramebufferConfig::PixelFormat::ABGR8:
internal_format = GL_RGBA8;
texture.gl_format = GL_RGBA;
texture.gl_type = GL_UNSIGNED_INT_8_8_8_8_REV;
break;
case Tegra::FramebufferConfig::PixelFormat::RGB565:
internal_format = GL_RGB565;
texture.gl_format = GL_RGB;
texture.gl_type = GL_UNSIGNED_SHORT_5_6_5;
break;
default:
internal_format = GL_RGBA8;
texture.gl_format = GL_RGBA;
texture.gl_type = GL_UNSIGNED_INT_8_8_8_8_REV;
UNIMPLEMENTED_MSG("Unknown framebuffer pixel format: {}",
static_cast<u32>(framebuffer.pixel_format));
}
texture.resource.Release();
texture.resource.Create(GL_TEXTURE_2D);
glTextureStorage2D(texture.resource.handle, 1, internal_format, texture.width, texture.height);
}
void RendererOpenGL::DrawScreen(const Layout::FramebufferLayout& layout) {
if (renderer_settings.set_background_color) {
// Update background color before drawing
glClearColor(Settings::values.bg_red, Settings::values.bg_green, Settings::values.bg_blue,
0.0f);
}
// Set projection matrix
const std::array ortho_matrix =
MakeOrthographicMatrix(static_cast<float>(layout.width), static_cast<float>(layout.height));
glProgramUniformMatrix3x2fv(vertex_program.handle, ModelViewMatrixLocation, 1, GL_FALSE,
std::data(ortho_matrix));
const auto& texcoords = screen_info.display_texcoords;
auto left = texcoords.left;
auto right = texcoords.right;
if (framebuffer_transform_flags != Tegra::FramebufferConfig::TransformFlags::Unset) {
if (framebuffer_transform_flags == Tegra::FramebufferConfig::TransformFlags::FlipV) {
// Flip the framebuffer vertically
left = texcoords.right;
right = texcoords.left;
} else {
// Other transformations are unsupported
LOG_CRITICAL(Render_OpenGL, "Unsupported framebuffer_transform_flags={}",
static_cast<u32>(framebuffer_transform_flags));
UNIMPLEMENTED();
}
}
ASSERT_MSG(framebuffer_crop_rect.top == 0, "Unimplemented");
ASSERT_MSG(framebuffer_crop_rect.left == 0, "Unimplemented");
// Scale the output by the crop width/height. This is commonly used with 1280x720 rendering
// (e.g. handheld mode) on a 1920x1080 framebuffer.
f32 scale_u = 1.f, scale_v = 1.f;
if (framebuffer_crop_rect.GetWidth() > 0) {
scale_u = static_cast<f32>(framebuffer_crop_rect.GetWidth()) /
static_cast<f32>(screen_info.texture.width);
}
if (framebuffer_crop_rect.GetHeight() > 0) {
scale_v = static_cast<f32>(framebuffer_crop_rect.GetHeight()) /
static_cast<f32>(screen_info.texture.height);
}
const auto& screen = layout.screen;
const std::array vertices = {
ScreenRectVertex(screen.left, screen.top, texcoords.top * scale_u, left * scale_v),
ScreenRectVertex(screen.right, screen.top, texcoords.bottom * scale_u, left * scale_v),
ScreenRectVertex(screen.left, screen.bottom, texcoords.top * scale_u, right * scale_v),
ScreenRectVertex(screen.right, screen.bottom, texcoords.bottom * scale_u, right * scale_v),
};
glNamedBufferSubData(vertex_buffer.handle, 0, sizeof(vertices), std::data(vertices));
// TODO: Signal state tracker about these changes
state_tracker.NotifyScreenDrawVertexArray();
state_tracker.NotifyPolygonModes();
state_tracker.NotifyViewport0();
state_tracker.NotifyScissor0();
state_tracker.NotifyColorMask0();
state_tracker.NotifyBlend0();
state_tracker.NotifyFramebuffer();
state_tracker.NotifyFrontFace();
state_tracker.NotifyCullTest();
state_tracker.NotifyDepthTest();
state_tracker.NotifyStencilTest();
state_tracker.NotifyPolygonOffset();
state_tracker.NotifyRasterizeEnable();
state_tracker.NotifyFramebufferSRGB();
state_tracker.NotifyLogicOp();
state_tracker.NotifyClipControl();
state_tracker.NotifyAlphaTest();
program_manager.UseVertexShader(vertex_program.handle);
program_manager.UseGeometryShader(0);
program_manager.UseFragmentShader(fragment_program.handle);
program_manager.BindGraphicsPipeline();
glEnable(GL_CULL_FACE);
if (screen_info.display_srgb) {
glEnable(GL_FRAMEBUFFER_SRGB);
} else {
glDisable(GL_FRAMEBUFFER_SRGB);
}
glDisable(GL_COLOR_LOGIC_OP);
glDisable(GL_DEPTH_TEST);
glDisable(GL_STENCIL_TEST);
glDisable(GL_POLYGON_OFFSET_FILL);
glDisable(GL_RASTERIZER_DISCARD);
glDisable(GL_ALPHA_TEST);
glDisablei(GL_BLEND, 0);
glDisablei(GL_SCISSOR_TEST, 0);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glCullFace(GL_BACK);
glFrontFace(GL_CW);
glColorMaski(0, GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glClipControl(GL_LOWER_LEFT, GL_ZERO_TO_ONE);
glViewportIndexedf(0, 0.0f, 0.0f, static_cast<GLfloat>(layout.width),
static_cast<GLfloat>(layout.height));
glDepthRangeIndexed(0, 0.0, 0.0);
glEnableVertexAttribArray(PositionLocation);
glEnableVertexAttribArray(TexCoordLocation);
glVertexAttribDivisor(PositionLocation, 0);
glVertexAttribDivisor(TexCoordLocation, 0);
glVertexAttribFormat(PositionLocation, 2, GL_FLOAT, GL_FALSE,
offsetof(ScreenRectVertex, position));
glVertexAttribFormat(TexCoordLocation, 2, GL_FLOAT, GL_FALSE,
offsetof(ScreenRectVertex, tex_coord));
glVertexAttribBinding(PositionLocation, 0);
glVertexAttribBinding(TexCoordLocation, 0);
glBindVertexBuffer(0, vertex_buffer.handle, 0, sizeof(ScreenRectVertex));
glBindTextureUnit(0, screen_info.display_texture);
glBindSampler(0, 0);
glClear(GL_COLOR_BUFFER_BIT);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}
bool RendererOpenGL::TryPresent(int timeout_ms) {
if (has_debug_tool) {
LOG_DEBUG(Render_OpenGL,
"Skipping presentation because we are presenting on the main context");
return false;
}
return Present(timeout_ms);
}
bool RendererOpenGL::Present(int timeout_ms) {
const auto& layout = render_window.GetFramebufferLayout();
auto frame = frame_mailbox->TryGetPresentFrame(timeout_ms);
if (!frame) {
LOG_DEBUG(Render_OpenGL, "TryGetPresentFrame returned no frame to present");
return false;
}
// Clearing before a full overwrite of a fbo can signal to drivers that they can avoid a
// readback since we won't be doing any blending
glClear(GL_COLOR_BUFFER_BIT);
// Recreate the presentation FBO if the color attachment was changed
if (frame->color_reloaded) {
LOG_DEBUG(Render_OpenGL, "Reloading present frame");
frame_mailbox->ReloadPresentFrame(frame, layout.width, layout.height);
}
glWaitSync(frame->render_fence, 0, GL_TIMEOUT_IGNORED);
// INTEL workaround.
// Normally we could just delete the draw fence here, but due to driver bugs, we can just delete
// it on the emulation thread without too much penalty
// glDeleteSync(frame.render_sync);
// frame.render_sync = 0;
glBindFramebuffer(GL_READ_FRAMEBUFFER, frame->present.handle);
glBlitFramebuffer(0, 0, frame->width, frame->height, 0, 0, layout.width, layout.height,
GL_COLOR_BUFFER_BIT, GL_LINEAR);
// Insert fence for the main thread to block on
frame->present_fence = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
glFlush();
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
return true;
}
void RendererOpenGL::RenderScreenshot() {
if (!renderer_settings.screenshot_requested) {
return;
}
GLint old_read_fb;
GLint old_draw_fb;
glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &old_read_fb);
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &old_draw_fb);
// Draw the current frame to the screenshot framebuffer
screenshot_framebuffer.Create();
glBindFramebuffer(GL_FRAMEBUFFER, screenshot_framebuffer.handle);
Layout::FramebufferLayout layout{renderer_settings.screenshot_framebuffer_layout};
GLuint renderbuffer;
glGenRenderbuffers(1, &renderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
glRenderbufferStorage(GL_RENDERBUFFER, screen_info.display_srgb ? GL_SRGB8 : GL_RGB8,
layout.width, layout.height);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, renderbuffer);
DrawScreen(layout);
glReadPixels(0, 0, layout.width, layout.height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
renderer_settings.screenshot_bits);
screenshot_framebuffer.Release();
glDeleteRenderbuffers(1, &renderbuffer);
glBindFramebuffer(GL_READ_FRAMEBUFFER, old_read_fb);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, old_draw_fb);
renderer_settings.screenshot_complete_callback();
renderer_settings.screenshot_requested = false;
}
bool RendererOpenGL::Init() {
if (GLAD_GL_KHR_debug) {
glEnable(GL_DEBUG_OUTPUT);
glDebugMessageCallback(DebugHandler, nullptr);
}
AddTelemetryFields();
if (!GLAD_GL_VERSION_4_3) {
return false;
}
InitOpenGLObjects();
CreateRasterizer();
return true;
}
void RendererOpenGL::ShutDown() {}
} // namespace OpenGL
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