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Diffstat (limited to '')
-rw-r--r-- | src/video_core/renderer_opengl/present/window_adapt_pass.cpp | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/video_core/renderer_opengl/present/window_adapt_pass.cpp b/src/video_core/renderer_opengl/present/window_adapt_pass.cpp new file mode 100644 index 000000000..168fa1aea --- /dev/null +++ b/src/video_core/renderer_opengl/present/window_adapt_pass.cpp @@ -0,0 +1,128 @@ +// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "common/settings.h" +#include "video_core/host_shaders/opengl_present_vert.h" +#include "video_core/renderer_opengl/gl_device.h" +#include "video_core/renderer_opengl/gl_shader_manager.h" +#include "video_core/renderer_opengl/gl_shader_util.h" +#include "video_core/renderer_opengl/present/window_adapt_pass.h" + +namespace OpenGL { + +namespace { +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; +}; + +/** + * Defines a 1:1 pixel orthographic 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; +} +} // namespace + +WindowAdaptPass::WindowAdaptPass(const Device& device_, OGLSampler&& sampler_, + std::string_view frag_source) + : device(device_), sampler(std::move(sampler_)) { + vert = CreateProgram(HostShaders::OPENGL_PRESENT_VERT, GL_VERTEX_SHADER); + frag = CreateProgram(frag_source, GL_FRAGMENT_SHADER); + + // Generate VBO handle for drawing + vertex_buffer.Create(); + + // Attach vertex data to VAO + glNamedBufferData(vertex_buffer.handle, sizeof(ScreenRectVertex) * 4, nullptr, GL_STREAM_DRAW); + + // Query vertex buffer address when the driver supports unified vertex attributes + if (device.HasVertexBufferUnifiedMemory()) { + glMakeNamedBufferResidentNV(vertex_buffer.handle, GL_READ_ONLY); + glGetNamedBufferParameterui64vNV(vertex_buffer.handle, GL_BUFFER_GPU_ADDRESS_NV, + &vertex_buffer_address); + } +} + +WindowAdaptPass::~WindowAdaptPass() = default; + +void WindowAdaptPass::DrawToFramebuffer(ProgramManager& program_manager, GLuint texture, + const Layout::FramebufferLayout& layout, + const Common::Rectangle<f32>& crop) { + glBindTextureUnit(0, texture); + + const std::array ortho_matrix = + MakeOrthographicMatrix(static_cast<float>(layout.width), static_cast<float>(layout.height)); + + program_manager.BindPresentPrograms(vert.handle, frag.handle); + glProgramUniformMatrix3x2fv(vert.handle, ModelViewMatrixLocation, 1, GL_FALSE, + ortho_matrix.data()); + + // 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(); + + const std::array vertices = { + ScreenRectVertex(x, y, crop.left, crop.top), + ScreenRectVertex(x + w, y, crop.right, crop.top), + ScreenRectVertex(x, y + h, crop.left, crop.bottom), + ScreenRectVertex(x + w, y + h, crop.right, crop.bottom), + }; + glNamedBufferSubData(vertex_buffer.handle, 0, sizeof(vertices), std::data(vertices)); + + glDisable(GL_FRAMEBUFFER_SRGB); + glViewportIndexedf(0, 0.0f, 0.0f, static_cast<GLfloat>(layout.width), + static_cast<GLfloat>(layout.height)); + + 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); + if (device.HasVertexBufferUnifiedMemory()) { + glBindVertexBuffer(0, 0, 0, sizeof(ScreenRectVertex)); + glBufferAddressRangeNV(GL_VERTEX_ATTRIB_ARRAY_ADDRESS_NV, 0, vertex_buffer_address, + sizeof(vertices)); + } else { + glBindVertexBuffer(0, vertex_buffer.handle, 0, sizeof(ScreenRectVertex)); + } + + glBindSampler(0, sampler.handle); + + // Update background color before drawing + glClearColor(Settings::values.bg_red.GetValue() / 255.0f, + Settings::values.bg_green.GetValue() / 255.0f, + Settings::values.bg_blue.GetValue() / 255.0f, 1.0f); + + glClear(GL_COLOR_BUFFER_BIT); + glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); +} + +} // namespace OpenGL |