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Workaround a performance bug in older Mali GPUs (#185)

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PabloMK7 2024-07-13 23:47:11 +02:00 committed by GitHub
parent e90795b616
commit 40851682ce
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4 changed files with 24 additions and 8 deletions
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9
src/video_core/renderer_opengl/gl_driver.cpp
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@ -199,6 +199,15 @@ void Driver::FindBugs() {
if (vendor == Vendor::Intel && !is_linux) {
bugs |= DriverBug::BrokenClearTexture;
}
if (vendor == Vendor::ARM && gpu_model.find("Mali") != gpu_model.npos) {
constexpr GLint MIN_TEXTURE_BUFFER_SIZE = static_cast<GLint>((1 << 16));
GLint max_texel_buffer_size;
glGetIntegerv(GL_MAX_TEXTURE_BUFFER_SIZE, &max_texel_buffer_size);
if (max_texel_buffer_size == MIN_TEXTURE_BUFFER_SIZE) {
bugs |= DriverBug::SlowTextureBufferWithBigSize;
}
}
}
} // namespace OpenGL

3
src/video_core/renderer_opengl/gl_driver.h
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@ -36,6 +36,9 @@ enum class DriverBug {
BrokenTextureView = 1 << 2,
// On Haswell and Broadwell Intel drivers glClearTexSubImage produces a black screen
BrokenClearTexture = 1 << 3,
// On some Mali GPUs, the texture buffer size is small and has reduced performance
// if the buffer is close to the maximum texture size
SlowTextureBufferWithBigSize = 1 << 4,
};
/**

19
src/video_core/renderer_opengl/gl_rasterizer.cpp
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@ -63,12 +63,19 @@ GLenum MakeAttributeType(Pica::PipelineRegs::VertexAttributeFormat format) {
return GL_UNSIGNED_BYTE;
}
[[nodiscard]] GLsizeiptr TextureBufferSize() {
[[nodiscard]] GLsizeiptr TextureBufferSize(const Driver& driver, bool is_lf) {
// Use the smallest texel size from the texel views
// which corresponds to GL_RG32F
GLint max_texel_buffer_size;
glGetIntegerv(GL_MAX_TEXTURE_BUFFER_SIZE, &max_texel_buffer_size);
return std::min<GLsizeiptr>(max_texel_buffer_size * 8ULL, TEXTURE_BUFFER_SIZE);
GLsizeiptr candidate = std::min<GLsizeiptr>(max_texel_buffer_size * 8ULL, TEXTURE_BUFFER_SIZE);
if (driver.HasBug(DriverBug::SlowTextureBufferWithBigSize) && !is_lf) {
constexpr GLsizeiptr FIXUP_TEXTURE_BUFFER_SIZE = static_cast<GLsizeiptr>(1 << 14); // 16384
return FIXUP_TEXTURE_BUFFER_SIZE;
}
return candidate;
}
} // Anonymous namespace
@ -79,13 +86,11 @@ RasterizerOpenGL::RasterizerOpenGL(Memory::MemorySystem& memory, Pica::PicaCore&
: VideoCore::RasterizerAccelerated{memory, pica}, driver{driver_},
shader_manager{renderer.GetRenderWindow(), driver, !driver.IsOpenGLES()},
runtime{driver, renderer}, res_cache{memory, custom_tex_manager, runtime, regs, renderer},
texture_buffer_size{TextureBufferSize()}, vertex_buffer{driver, GL_ARRAY_BUFFER,
VERTEX_BUFFER_SIZE},
vertex_buffer{driver, GL_ARRAY_BUFFER, VERTEX_BUFFER_SIZE},
uniform_buffer{driver, GL_UNIFORM_BUFFER, UNIFORM_BUFFER_SIZE},
index_buffer{driver, GL_ELEMENT_ARRAY_BUFFER, INDEX_BUFFER_SIZE},
texture_buffer{driver, GL_TEXTURE_BUFFER, texture_buffer_size}, texture_lf_buffer{
driver, GL_TEXTURE_BUFFER,
texture_buffer_size} {
texture_buffer{driver, GL_TEXTURE_BUFFER, TextureBufferSize(driver, false)},
texture_lf_buffer{driver, GL_TEXTURE_BUFFER, TextureBufferSize(driver, true)} {
// Clipping plane 0 is always enabled for PICA fixed clip plane z <= 0
state.clip_distance[0] = true;

1
src/video_core/renderer_opengl/gl_rasterizer.h
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@ -145,7 +145,6 @@ private:
OGLVertexArray hw_vao; // VAO for hardware shader / accelerate draw
std::array<bool, 16> hw_vao_enabled_attributes{};
GLsizeiptr texture_buffer_size;
OGLStreamBuffer vertex_buffer;
OGLStreamBuffer uniform_buffer;
OGLStreamBuffer index_buffer;