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OGL/ProgramShaderCache: Use std::string_view where applicable

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lioncash committed Jul 26, 2019
1 parent 3c8f6bc commit fb384dec5501b22ac64b6770a0ae2970e24c8d27
@@ -4,6 +4,7 @@

#include "VideoBackends/OGL/ProgramShaderCache.h"

#include <array>
#include <atomic>
#include <limits>
#include <memory>
@@ -267,19 +268,19 @@ void ProgramShaderCache::UploadConstants(const void* data, u32 data_size)
ADDSTAT(g_stats.this_frame.bytes_uniform_streamed, data_size);
}

bool ProgramShaderCache::CompileComputeShader(SHADER& shader, const std::string& code)
bool ProgramShaderCache::CompileComputeShader(SHADER& shader, std::string_view code)
{
// We need to enable GL_ARB_compute_shader for drivers that support the extension,
// but not GLSL 4.3. Mesa is one example.
std::string header;
std::string full_code;
if (g_ActiveConfig.backend_info.bSupportsComputeShaders &&
g_ogl_config.eSupportedGLSLVersion < Glsl430)
{
header = "#extension GL_ARB_compute_shader : enable\n";
full_code = "#extension GL_ARB_compute_shader : enable\n";
}

std::string full_code = header + code;
GLuint shader_id = CompileSingleShader(GL_COMPUTE_SHADER, full_code);
full_code += code;
const GLuint shader_id = CompileSingleShader(GL_COMPUTE_SHADER, full_code);
if (!shader_id)
return false;

@@ -291,7 +292,7 @@ bool ProgramShaderCache::CompileComputeShader(SHADER& shader, const std::string&
// original shaders aren't needed any more
glDeleteShader(shader_id);

if (!CheckProgramLinkResult(shader.glprogid, &full_code, nullptr, nullptr))
if (!CheckProgramLinkResult(shader.glprogid, full_code, {}, {}))
{
shader.Destroy();
return false;
@@ -301,13 +302,21 @@ bool ProgramShaderCache::CompileComputeShader(SHADER& shader, const std::string&
return true;
}

GLuint ProgramShaderCache::CompileSingleShader(GLenum type, const std::string& code)
GLuint ProgramShaderCache::CompileSingleShader(GLenum type, std::string_view code)
{
GLuint result = glCreateShader(type);
const GLuint result = glCreateShader(type);

const char* src[] = {s_glsl_header.c_str(), code.c_str()};
constexpr GLsizei num_strings = 2;
const std::array<const char*, num_strings> src{
s_glsl_header.data(),
code.data(),
};
const std::array<GLint, num_strings> src_sizes{
static_cast<GLint>(s_glsl_header.size()),
static_cast<GLint>(code.size()),
};

glShaderSource(result, 2, src, nullptr);
glShaderSource(result, num_strings, src.data(), src_sizes.data());
glCompileShader(result);

if (!CheckShaderCompileResult(result, type, code))
@@ -320,7 +329,7 @@ GLuint ProgramShaderCache::CompileSingleShader(GLenum type, const std::string& c
return result;
}

bool ProgramShaderCache::CheckShaderCompileResult(GLuint id, GLenum type, const std::string& code)
bool ProgramShaderCache::CheckShaderCompileResult(GLuint id, GLenum type, std::string_view code)
{
GLint compileStatus;
glGetShaderiv(id, GL_COMPILE_STATUS, &compileStatus);
@@ -374,8 +383,8 @@ bool ProgramShaderCache::CheckShaderCompileResult(GLuint id, GLenum type, const
return true;
}

bool ProgramShaderCache::CheckProgramLinkResult(GLuint id, const std::string* vcode,
const std::string* pcode, const std::string* gcode)
bool ProgramShaderCache::CheckProgramLinkResult(GLuint id, std::string_view vcode,
std::string_view pcode, std::string_view gcode)
{
GLint linkStatus;
glGetProgramiv(id, GL_LINK_STATUS, &linkStatus);
@@ -393,12 +402,12 @@ bool ProgramShaderCache::CheckProgramLinkResult(GLuint id, const std::string* vc
StringFromFormat("%sbad_p_%d.txt", File::GetUserPath(D_DUMP_IDX).c_str(), num_failures++);
std::ofstream file;
File::OpenFStream(file, filename, std::ios_base::out);
if (vcode)
file << s_glsl_header << *vcode << '\n';
if (gcode)
file << s_glsl_header << *gcode << '\n';
if (pcode)
file << s_glsl_header << *pcode << '\n';
if (!vcode.empty())
file << s_glsl_header << vcode << '\n';
if (!gcode.empty())
file << s_glsl_header << gcode << '\n';
if (!pcode.empty())
file << s_glsl_header << pcode << '\n';

file << info_log;
file.close();
@@ -583,10 +592,10 @@ PipelineProgram* ProgramShaderCache::GetPipelineProgram(const GLVertexFormat* ve
if (!s_is_shared_context && vao != s_last_VAO)
glBindVertexArray(s_last_VAO);

if (!ProgramShaderCache::CheckProgramLinkResult(
prog->shader.glprogid, vertex_shader ? &vertex_shader->GetSource() : nullptr,
geometry_shader ? &geometry_shader->GetSource() : nullptr,
pixel_shader ? &pixel_shader->GetSource() : nullptr))
if (!CheckProgramLinkResult(prog->shader.glprogid,
vertex_shader ? vertex_shader->GetSource() : std::string_view{},
geometry_shader ? geometry_shader->GetSource() : std::string_view{},
pixel_shader ? pixel_shader->GetSource() : std::string_view{}))
{
prog->shader.Destroy();
return nullptr;
@@ -7,7 +7,7 @@
#include <atomic>
#include <memory>
#include <mutex>
#include <tuple>
#include <string_view>
#include <unordered_map>

#include "Common/GL/GLUtil.h"
@@ -75,11 +75,11 @@ class ProgramShaderCache
static void InvalidateVertexFormatIfBound(GLuint vao);
static void InvalidateLastProgram();

static bool CompileComputeShader(SHADER& shader, const std::string& code);
static GLuint CompileSingleShader(GLenum type, const std::string& code);
static bool CheckShaderCompileResult(GLuint id, GLenum type, const std::string& code);
static bool CheckProgramLinkResult(GLuint id, const std::string* vcode, const std::string* pcode,
const std::string* gcode);
static bool CompileComputeShader(SHADER& shader, std::string_view code);
static GLuint CompileSingleShader(GLenum type, std::string_view code);
static bool CheckShaderCompileResult(GLuint id, GLenum type, std::string_view code);
static bool CheckProgramLinkResult(GLuint id, std::string_view vcode, std::string_view pcode,
std::string_view gcode);
static StreamBuffer* GetUniformBuffer();
static u32 GetUniformBufferAlignment();
static void UploadConstants();

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