597 lines
18 KiB
C++
597 lines
18 KiB
C++
/*****************************************************************************\
|
|
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
|
|
This file is licensed under the Snes9x License.
|
|
For further information, consult the LICENSE file in the root directory.
|
|
\*****************************************************************************/
|
|
|
|
#include "glsl.h"
|
|
#include "shader_helpers.h"
|
|
#include <vector>
|
|
#include <string>
|
|
#include <sstream>
|
|
#include "external/glslang/glslang/Public/ShaderLang.h"
|
|
#include "external/glslang/SPIRV/GlslangToSpv.h"
|
|
#include "external/glslang/StandAlone/ResourceLimits.h"
|
|
#include "external/SPIRV-Cross/spirv_cross.hpp"
|
|
#include "external/SPIRV-Cross/spirv_glsl.hpp"
|
|
|
|
std::string GLSLShader::slang_get_stage(std::vector<std::string> &lines,
|
|
std::string name)
|
|
{
|
|
std::ostringstream output;
|
|
bool in_stage = true;
|
|
|
|
if (name.empty())
|
|
return std::string("");
|
|
|
|
for (auto &line : lines)
|
|
{
|
|
if (line.compare(0, 13, "#pragma stage") == 0)
|
|
{
|
|
if (line.find(std::string("#pragma stage ") + name) !=
|
|
std::string::npos)
|
|
in_stage = true;
|
|
else
|
|
in_stage = false;
|
|
}
|
|
else if (in_stage)
|
|
{
|
|
output << line << '\n';
|
|
}
|
|
}
|
|
|
|
return output.str();
|
|
}
|
|
|
|
#if 0
|
|
static void printuniforms(std::vector<SlangUniform> &unif)
|
|
{
|
|
for (int i = 0; i < (int)unif.size(); i++)
|
|
{
|
|
SlangUniform &u = unif[i];
|
|
printf("Uniform %d: ", i);
|
|
switch (u.type)
|
|
{
|
|
case SL_PREVIOUSFRAMETEXTURE:
|
|
printf("OriginalHistory%d\n", u.num);
|
|
break;
|
|
case SL_PASSTEXTURE:
|
|
printf("Pass%d\n", u.num);
|
|
break;
|
|
case SL_LUTTEXTURE:
|
|
printf("User%d\n", u.num);
|
|
break;
|
|
case SL_PREVIOUSFRAMESIZE:
|
|
printf("OriginalHistorySize%d\n", u.num);
|
|
break;
|
|
case SL_PASSSIZE:
|
|
printf("PassSize%d\n", u.num);
|
|
break;
|
|
case SL_LUTSIZE:
|
|
printf("UserSize%d\n", u.num);
|
|
break;
|
|
case SL_MVP:
|
|
printf("MVP\n");
|
|
break;
|
|
case SL_FRAMECOUNT:
|
|
printf("FrameCount\n");
|
|
break;
|
|
case SL_PARAM:
|
|
printf("Parameter %d\n", u.num);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif // #if 0
|
|
|
|
GLint GLSLShader::slang_compile(std::vector<std::string> &lines,
|
|
std::string stage)
|
|
{
|
|
static bool ProcessInitialized = false;
|
|
|
|
if (!ProcessInitialized)
|
|
{
|
|
glslang::InitializeProcess();
|
|
ProcessInitialized = true;
|
|
}
|
|
|
|
std::string source = slang_get_stage(lines, stage);
|
|
|
|
EShLanguage language;
|
|
if (!stage.compare("fragment"))
|
|
language = EShLangFragment;
|
|
else
|
|
language = EShLangVertex;
|
|
glslang::TShader shader(language);
|
|
|
|
const char *csource = source.c_str();
|
|
shader.setStrings(&csource, 1);
|
|
|
|
EShMessages messages =
|
|
(EShMessages)(EShMsgDefault | EShMsgVulkanRules | EShMsgSpvRules);
|
|
|
|
std::string debug;
|
|
auto forbid_includer = glslang::TShader::ForbidIncluder();
|
|
|
|
if (!shader.preprocess(&glslang::DefaultTBuiltInResource, 100, ENoProfile, false,
|
|
false, messages, &debug, forbid_includer))
|
|
{
|
|
puts(debug.c_str());
|
|
return -1;
|
|
}
|
|
|
|
if (!shader.parse(&glslang::DefaultTBuiltInResource, 100, false, messages))
|
|
{
|
|
puts(shader.getInfoLog());
|
|
puts(shader.getInfoDebugLog());
|
|
return -1;
|
|
}
|
|
|
|
glslang::TProgram program;
|
|
program.addShader(&shader);
|
|
|
|
if (!program.link(messages))
|
|
{
|
|
puts(shader.getInfoLog());
|
|
puts(shader.getInfoDebugLog());
|
|
return -1;
|
|
}
|
|
|
|
std::vector<uint32_t> spirv;
|
|
glslang::GlslangToSpv(*program.getIntermediate(language), spirv);
|
|
|
|
spirv_cross::CompilerGLSL glsl(std::move(spirv));
|
|
|
|
auto resources = glsl.get_shader_resources();
|
|
if (resources.push_constant_buffers.size() > 1 ||
|
|
resources.uniform_buffers.size() > 1)
|
|
{
|
|
puts("slang shader doesn't comply with spec:\n"
|
|
" Too many UBOs or push constant buffers.");
|
|
return -1;
|
|
}
|
|
|
|
if (language == EShLangFragment)
|
|
{
|
|
for (auto &rsrc : resources.stage_inputs)
|
|
{
|
|
// Some of the converted shaders have unmatched declarations for
|
|
// this in fragment shader
|
|
if (glsl.get_name(rsrc.id) == "FragCoord")
|
|
{
|
|
glsl.set_remapped_variable_state(rsrc.id, true);
|
|
glsl.set_name(rsrc.id, "gl_FragCoord");
|
|
}
|
|
}
|
|
}
|
|
|
|
spirv_cross::CompilerGLSL::Options opts;
|
|
opts.version = gl_version() * 10;
|
|
if (opts.version < 330 && opts.version > 150)
|
|
opts.version = 150;
|
|
opts.vulkan_semantics = false;
|
|
glsl.set_common_options(opts);
|
|
|
|
std::string glsl_source = glsl.compile();
|
|
|
|
GLint status = 0;
|
|
GLchar *cstring = (GLchar *)glsl_source.c_str();
|
|
|
|
GLint shaderid = glCreateShader(
|
|
language == EShLangFragment ? GL_FRAGMENT_SHADER : GL_VERTEX_SHADER);
|
|
glShaderSource(shaderid, 1, &cstring, NULL);
|
|
glCompileShader(shaderid);
|
|
|
|
glGetShaderiv(shaderid, GL_COMPILE_STATUS, &status);
|
|
|
|
char info_log[1024];
|
|
glGetShaderInfoLog(shaderid, 1024, NULL, info_log);
|
|
if (*info_log)
|
|
puts(info_log);
|
|
|
|
if (status == GL_FALSE)
|
|
return -1;
|
|
|
|
return shaderid;
|
|
}
|
|
|
|
static inline bool isalldigits(std::string str)
|
|
{
|
|
for (auto c : str)
|
|
{
|
|
if (!isdigit(c))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void GLSLShader::slang_introspect()
|
|
{
|
|
max_prev_frame = 0;
|
|
using_feedback = false;
|
|
|
|
for (int i = 1; i < (int)pass.size(); i++)
|
|
{
|
|
GLSLPass &p = pass[i];
|
|
p.feedback_texture = 0;
|
|
|
|
int num_uniforms;
|
|
glGetProgramiv(p.program, GL_ACTIVE_UNIFORMS, &num_uniforms);
|
|
std::vector<GLuint> indices(num_uniforms);
|
|
std::vector<GLint> block_indices(num_uniforms);
|
|
std::vector<GLint> offsets(num_uniforms);
|
|
std::vector<std::string> names;
|
|
std::vector<GLint> locations(num_uniforms);
|
|
|
|
for (int j = 0; j < num_uniforms; j++)
|
|
indices[j] = j;
|
|
|
|
glGetActiveUniformsiv(p.program, num_uniforms, indices.data(), GL_UNIFORM_BLOCK_INDEX, block_indices.data());
|
|
glGetActiveUniformsiv(p.program, num_uniforms, indices.data(), GL_UNIFORM_OFFSET, offsets.data());
|
|
|
|
for (int j = 0; j < num_uniforms; j++)
|
|
{
|
|
char name[1024];
|
|
glGetActiveUniformName(p.program, j, 1024, NULL, name);
|
|
names.push_back(std::string(name));
|
|
locations[j] = glGetUniformLocation(p.program, name);
|
|
}
|
|
|
|
for (int j = 0; j < num_uniforms; j++)
|
|
{
|
|
SlangUniform u = { 0, 0, 0, 0 };
|
|
std::string name;
|
|
|
|
if (locations[j] == -1)
|
|
{
|
|
u.location = -1;
|
|
u.offset = offsets[j];
|
|
}
|
|
else
|
|
u.location = locations[j];
|
|
|
|
// Strip off any container
|
|
size_t dotloc = names[j].find('.');
|
|
if (dotloc != std::string::npos)
|
|
name = names[j].substr(dotloc + 1);
|
|
else
|
|
name = names[j];
|
|
|
|
auto indexedtexorsize = [&](std::string needle, int type) -> bool {
|
|
if (name.find(needle) == 0)
|
|
{
|
|
std::string tmp = name.substr(needle.length());
|
|
if (tmp.find("Size") == 0)
|
|
{
|
|
u.type = type + 1;
|
|
tmp = tmp.substr(4);
|
|
}
|
|
else
|
|
u.type = type;
|
|
|
|
if (isalldigits(tmp))
|
|
{
|
|
u.num = std::stoi(tmp);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
};
|
|
|
|
if (!name.compare("MVP"))
|
|
{
|
|
u.type = SL_MVP;
|
|
}
|
|
else if (!name.compare("Original"))
|
|
{
|
|
u.type = SL_PASSTEXTURE;
|
|
u.num = 0;
|
|
}
|
|
else if (!name.compare("OriginalSize"))
|
|
{
|
|
u.type = SL_PASSSIZE;
|
|
u.num = 0;
|
|
}
|
|
else if (!name.compare("Source"))
|
|
{
|
|
u.type = SL_PASSTEXTURE;
|
|
u.num = i - 1;
|
|
}
|
|
else if (!name.compare("SourceSize"))
|
|
{
|
|
u.type = SL_PASSSIZE;
|
|
u.num = i - 1;
|
|
}
|
|
else if (!name.compare("OutputSize"))
|
|
{
|
|
u.type = SL_PASSSIZE;
|
|
u.num = i;
|
|
}
|
|
else if (!name.compare("FrameCount"))
|
|
{
|
|
u.type = SL_FRAMECOUNT;
|
|
}
|
|
else if (indexedtexorsize("OriginalHistory", SL_PREVIOUSFRAMETEXTURE))
|
|
{
|
|
// OriginalHistory0 is just this frame's pass 0
|
|
if (u.num == 0)
|
|
{
|
|
if (u.type == SL_PREVIOUSFRAMETEXTURE)
|
|
u.type = SL_PASSTEXTURE;
|
|
if (u.type == SL_PREVIOUSFRAMESIZE)
|
|
u.type = SL_PASSSIZE;
|
|
}
|
|
if (u.num > max_prev_frame)
|
|
max_prev_frame = u.num;
|
|
}
|
|
else if (indexedtexorsize("PassOutput", SL_PASSTEXTURE))
|
|
{
|
|
u.num++;
|
|
}
|
|
else if (indexedtexorsize("PassFeedback", SL_FEEDBACK))
|
|
{
|
|
u.num++;
|
|
if (u.type == SL_FEEDBACK + 1)
|
|
u.type = SL_PASSSIZE;
|
|
else
|
|
{
|
|
pass[u.num].uses_feedback = true;
|
|
using_feedback = true;
|
|
}
|
|
}
|
|
else if (indexedtexorsize("User", SL_LUTTEXTURE))
|
|
{
|
|
}
|
|
if (u.type != SL_INVALID)
|
|
{
|
|
p.uniforms.push_back(u);
|
|
continue;
|
|
}
|
|
|
|
bool matched_lut = false;
|
|
for (int k = 0; k < (int)lut.size(); k++)
|
|
{
|
|
std::string lutname(lut[k].id);
|
|
|
|
if (name.compare(lutname) == 0)
|
|
{
|
|
u.type = SL_LUTTEXTURE;
|
|
u.num = k;
|
|
matched_lut = true;
|
|
}
|
|
else if (name.compare(lutname + "Size") == 0)
|
|
{
|
|
u.type = SL_LUTSIZE;
|
|
u.num = k;
|
|
matched_lut = true;
|
|
}
|
|
}
|
|
if (matched_lut)
|
|
{
|
|
p.uniforms.push_back(u);
|
|
continue;
|
|
}
|
|
|
|
bool matched_alias = false;
|
|
for (int k = 0; k < i; k++)
|
|
{
|
|
std::string alias(pass[k].alias);
|
|
|
|
if (name.compare(alias) == 0)
|
|
{
|
|
u.type = SL_PASSTEXTURE;
|
|
u.num = k;
|
|
matched_alias = true;
|
|
}
|
|
else if (name.compare(alias + "Size") == 0)
|
|
{
|
|
u.type = SL_PASSSIZE;
|
|
u.num = k;
|
|
matched_alias = true;
|
|
}
|
|
}
|
|
if (matched_alias)
|
|
{
|
|
p.uniforms.push_back(u);
|
|
continue;
|
|
}
|
|
|
|
u.type = SL_INVALID;
|
|
for (int k = 0; k < (int)param.size(); k++)
|
|
{
|
|
if (name.compare(param[k].id) == 0)
|
|
{
|
|
u.type = SL_PARAM;
|
|
u.num = k;
|
|
break;
|
|
}
|
|
}
|
|
if (u.type != SL_INVALID)
|
|
p.uniforms.push_back(u);
|
|
}
|
|
|
|
bool uniform_block = false;
|
|
for (auto &u : p.uniforms)
|
|
if (u.location == -1)
|
|
{
|
|
uniform_block = true;
|
|
break;
|
|
}
|
|
|
|
GLint uniform_block_size = 0;
|
|
if (uniform_block)
|
|
{
|
|
glGetActiveUniformBlockiv(p.program, 0, GL_UNIFORM_BLOCK_DATA_SIZE,
|
|
&uniform_block_size);
|
|
glGenBuffers(1, &p.ubo);
|
|
p.ubo_buffer.resize(uniform_block_size);
|
|
}
|
|
}
|
|
|
|
if (using_feedback)
|
|
for (int i = 1; i < (int)pass.size(); i++)
|
|
if (pass[i].uses_feedback)
|
|
glGenTextures(1, &pass[i].feedback_texture);
|
|
}
|
|
|
|
static const GLfloat coords[] = { 0.0f, 0.0f, 0.0f, 1.0f, // Vertex Positions
|
|
1.0f, 0.0f, 0.0f, 1.0f,
|
|
0.0f, 1.0f, 0.0f, 1.0f,
|
|
1.0f, 1.0f, 0.0f, 1.0f,
|
|
0.0f, 0.0f, // Tex coords regular + 16
|
|
1.0f, 0.0f,
|
|
0.0f, 1.0f,
|
|
1.0f, 1.0f,
|
|
0.0f, 1.0f, // Tex coords inverted + 24
|
|
1.0f, 1.0f,
|
|
0.0f, 0.0f,
|
|
1.0f, 0.0f };
|
|
|
|
static const GLfloat mvp_ortho[16] = { 2.0f, 0.0f, 0.0f, 0.0f,
|
|
0.0f, 2.0f, 0.0f, 0.0f,
|
|
0.0f, 0.0f, -1.0f, 0.0f,
|
|
-1.0f, -1.0f, 0.0f, 1.0f };
|
|
|
|
void GLSLShader::slang_clear_shader_vars()
|
|
{
|
|
glDisableVertexAttribArray(0);
|
|
glDisableVertexAttribArray(1);
|
|
glBindBuffer(GL_UNIFORM_BUFFER, 0);
|
|
}
|
|
|
|
void GLSLShader::slang_set_shader_vars(int p, bool inverted)
|
|
{
|
|
glBindBuffer(GL_ARRAY_BUFFER, vbo);
|
|
glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * 32, coords, GL_STATIC_DRAW);
|
|
|
|
GLint attr = glGetAttribLocation(pass[p].program, "Position");
|
|
if (attr > -1)
|
|
{
|
|
glEnableVertexAttribArray(attr);
|
|
glVertexAttribPointer(attr, 4, GL_FLOAT, GL_FALSE, 0, (void *)(0));
|
|
}
|
|
|
|
attr = glGetAttribLocation(pass[p].program, "TexCoord");
|
|
if (attr > -1)
|
|
{
|
|
GLfloat *offset = 0;
|
|
offset += 16;
|
|
if (inverted)
|
|
offset += 8;
|
|
|
|
glEnableVertexAttribArray(attr);
|
|
glVertexAttribPointer(attr, 2, GL_FLOAT, GL_FALSE, 0, (void *)(offset));
|
|
}
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
|
|
|
uint8_t *ubo = pass[p].ubo_buffer.data();
|
|
GLint texunit = 0;
|
|
|
|
for (auto &u : pass[p].uniforms)
|
|
{
|
|
switch (u.type)
|
|
{
|
|
case SL_PREVIOUSFRAMETEXTURE:
|
|
case SL_PASSTEXTURE:
|
|
case SL_LUTTEXTURE:
|
|
case SL_FEEDBACK:
|
|
glActiveTexture(GL_TEXTURE0 + texunit);
|
|
|
|
if (u.type == SL_PASSTEXTURE)
|
|
glBindTexture(GL_TEXTURE_2D, pass[u.num].texture);
|
|
else if (u.type == SL_PREVIOUSFRAMETEXTURE)
|
|
glBindTexture(GL_TEXTURE_2D, prev_frame[u.num - 1].texture);
|
|
else if (u.type == SL_LUTTEXTURE)
|
|
glBindTexture(GL_TEXTURE_2D, lut[u.num].texture);
|
|
else if (u.type == SL_FEEDBACK)
|
|
glBindTexture(GL_TEXTURE_2D, pass[u.num].feedback_texture);
|
|
|
|
if (u.location == -1)
|
|
*((GLint *)(ubo + u.offset)) = texunit;
|
|
else
|
|
glUniform1i(u.location, texunit);
|
|
texunit++;
|
|
break;
|
|
|
|
case SL_PREVIOUSFRAMESIZE:
|
|
case SL_PASSSIZE:
|
|
case SL_LUTSIZE:
|
|
{
|
|
GLfloat size[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
|
|
if (u.type == SL_PASSSIZE)
|
|
{
|
|
size[0] = (GLfloat)pass[u.num].width;
|
|
size[1] = (GLfloat)pass[u.num].height;
|
|
size[2] = (GLfloat)1.0f / pass[u.num].width;
|
|
size[3] = (GLfloat)1.0f / pass[u.num].height;
|
|
}
|
|
else if (u.type == SL_PREVIOUSFRAMESIZE)
|
|
{
|
|
if (u.num < 1)
|
|
u.num = 0;
|
|
size[0] = (GLfloat)prev_frame[u.num - 1].width;
|
|
size[1] = (GLfloat)prev_frame[u.num - 1].height;
|
|
size[2] = (GLfloat)1.0f / prev_frame[u.num - 1].width;
|
|
size[3] = (GLfloat)1.0f / prev_frame[u.num - 1].height;
|
|
}
|
|
else if (u.type == SL_LUTSIZE)
|
|
{
|
|
size[0] = (GLfloat)lut[u.num].width;
|
|
size[1] = (GLfloat)lut[u.num].height;
|
|
size[2] = (GLfloat)1.0f / lut[u.num].width;
|
|
size[3] = (GLfloat)1.0f / lut[u.num].height;
|
|
}
|
|
|
|
if (u.location == -1)
|
|
{
|
|
GLfloat *data = (GLfloat *)(ubo + u.offset);
|
|
data[0] = size[0];
|
|
data[1] = size[1];
|
|
data[2] = size[2];
|
|
data[3] = size[3];
|
|
}
|
|
else
|
|
glUniform4fv(u.location, 1, size);
|
|
break;
|
|
}
|
|
|
|
case SL_MVP:
|
|
if (u.location == -1)
|
|
{
|
|
|
|
GLfloat *data = (GLfloat *)(ubo + u.offset);
|
|
for (int i = 0; i < 16; i++)
|
|
data[i] = mvp_ortho[i];
|
|
}
|
|
else
|
|
glUniformMatrix4fv(u.location, 1, GL_FALSE, mvp_ortho);
|
|
break;
|
|
|
|
case SL_FRAMECOUNT:
|
|
if (u.location == -1)
|
|
*((GLuint *)(ubo + u.offset)) = frame_count;
|
|
else
|
|
glUniform1ui(u.location, frame_count);
|
|
break;
|
|
|
|
case SL_PARAM:
|
|
if (u.location == -1)
|
|
*((GLfloat *)(ubo + u.offset)) = param[u.num].val;
|
|
else
|
|
glUniform1f(u.location, param[u.num].val);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (pass[p].ubo_buffer.size() > 0)
|
|
{
|
|
glBindBuffer(GL_UNIFORM_BUFFER, pass[p].ubo);
|
|
glBufferData(GL_UNIFORM_BUFFER, pass[p].ubo_buffer.size(), ubo,
|
|
GL_DYNAMIC_DRAW);
|
|
glBindBufferBase(GL_UNIFORM_BUFFER, 0, pass[p].ubo);
|
|
glUniformBlockBinding(pass[p].program, 0, 0);
|
|
}
|
|
}
|