godot/drivers/gles3/shader_gles3.cpp
Fabio Alessandrelli 9b9a723c77 Some fixes for shaders and WebGL2
Add padding to UBO data to be multiple of 16 bytes
Add precision definition for samplers
Replace texture2D (deprecated) with texture in shaders
2017-08-11 23:26:24 +02:00

802 lines
21 KiB
C++

/*************************************************************************/
/* shader_gles3.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "shader_gles3.h"
#include "print_string.h"
//#define DEBUG_OPENGL
#ifdef DEBUG_OPENGL
#define DEBUG_TEST_ERROR(m_section) \
{ \
uint32_t err = glGetError(); \
if (err) { \
print_line("OpenGL Error #" + itos(err) + " at: " + m_section); \
} \
}
#else
#define DEBUG_TEST_ERROR(m_section)
#endif
ShaderGLES3 *ShaderGLES3::active = NULL;
//#define DEBUG_SHADER
#ifdef DEBUG_SHADER
#define DEBUG_PRINT(m_text) print_line(m_text);
#else
#define DEBUG_PRINT(m_text)
#endif
void ShaderGLES3::bind_uniforms() {
if (!uniforms_dirty) {
return;
};
// upload default uniforms
const Map<uint32_t, Variant>::Element *E = uniform_defaults.front();
while (E) {
int idx = E->key();
int location = version->uniform_location[idx];
if (location < 0) {
E = E->next();
continue;
}
const Variant &v = E->value();
_set_uniform_variant(location, v);
//print_line("uniform "+itos(location)+" value "+v+ " type "+Variant::get_type_name(v.get_type()));
E = E->next();
};
const Map<uint32_t, CameraMatrix>::Element *C = uniform_cameras.front();
while (C) {
int location = version->uniform_location[C->key()];
if (location < 0) {
C = C->next();
continue;
}
glUniformMatrix4fv(location, 1, false, &(C->get().matrix[0][0]));
C = C->next();
};
uniforms_dirty = false;
}
GLint ShaderGLES3::get_uniform_location(int p_idx) const {
ERR_FAIL_COND_V(!version, -1);
return version->uniform_location[p_idx];
}
bool ShaderGLES3::bind() {
if (active != this || !version || new_conditional_version.key != conditional_version.key) {
conditional_version = new_conditional_version;
version = get_current_version();
} else {
return false;
}
ERR_FAIL_COND_V(!version, false);
glUseProgram(version->id);
DEBUG_TEST_ERROR("Use Program");
active = this;
uniforms_dirty = true;
/*
* why on earth is this code here?
for (int i=0;i<texunit_pair_count;i++) {
glUniform1i(texunit_pairs[i].location, texunit_pairs[i].index);
DEBUG_TEST_ERROR("Uniform 1 i");
}
*/
return true;
}
void ShaderGLES3::unbind() {
version = NULL;
glUseProgram(0);
uniforms_dirty = true;
active = NULL;
}
static void _display_error_with_code(const String &p_error, const Vector<const char *> &p_code) {
int line = 1;
String total_code;
for (int i = 0; i < p_code.size(); i++) {
total_code += String(p_code[i]);
}
Vector<String> lines = String(total_code).split("\n");
for (int j = 0; j < lines.size(); j++) {
print_line(itos(line) + ": " + lines[j]);
line++;
}
ERR_PRINTS(p_error);
}
ShaderGLES3::Version *ShaderGLES3::get_current_version() {
Version *_v = version_map.getptr(conditional_version);
if (_v) {
if (conditional_version.code_version != 0) {
CustomCode *cc = custom_code_map.getptr(conditional_version.code_version);
ERR_FAIL_COND_V(!cc, _v);
if (cc->version == _v->code_version)
return _v;
} else {
return _v;
}
}
if (!_v)
version_map[conditional_version] = Version();
Version &v = version_map[conditional_version];
if (!_v) {
v.uniform_location = memnew_arr(GLint, uniform_count);
} else {
if (v.ok) {
//bye bye shaders
glDeleteShader(v.vert_id);
glDeleteShader(v.frag_id);
glDeleteProgram(v.id);
v.id = 0;
}
}
v.ok = false;
/* SETUP CONDITIONALS */
Vector<const char *> strings;
#ifdef GLES_OVER_GL
strings.push_back("#version 330\n");
strings.push_back("#define GLES_OVER_GL\n");
#else
strings.push_back("#version 300 es\n");
#endif
int define_line_ofs = 1;
for (int i = 0; i < custom_defines.size(); i++) {
strings.push_back(custom_defines[i].get_data());
define_line_ofs++;
}
for (int j = 0; j < conditional_count; j++) {
bool enable = ((1 << j) & conditional_version.version);
strings.push_back(enable ? conditional_defines[j] : "");
if (enable)
define_line_ofs++;
if (enable) {
DEBUG_PRINT(conditional_defines[j]);
}
}
//keep them around during the function
CharString code_string;
CharString code_string2;
CharString code_globals;
CharString material_string;
//print_line("code version? "+itos(conditional_version.code_version));
CustomCode *cc = NULL;
if (conditional_version.code_version > 0) {
//do custom code related stuff
ERR_FAIL_COND_V(!custom_code_map.has(conditional_version.code_version), NULL);
cc = &custom_code_map[conditional_version.code_version];
v.code_version = cc->version;
define_line_ofs += 2;
}
/* CREATE PROGRAM */
v.id = glCreateProgram();
ERR_FAIL_COND_V(v.id == 0, NULL);
/* VERTEX SHADER */
if (cc) {
for (int i = 0; i < cc->custom_defines.size(); i++) {
strings.push_back(cc->custom_defines[i].get_data());
DEBUG_PRINT("CD #" + itos(i) + ": " + String(cc->custom_defines[i]));
}
}
int strings_base_size = strings.size();
//vertex precision is high
strings.push_back("precision highp float;\n");
strings.push_back("precision highp int;\n");
strings.push_back("precision highp sampler2D;\n");
strings.push_back("precision highp samplerCube;\n");
strings.push_back("precision highp sampler2DArray;\n");
#if 0
if (cc) {
String _code_string = "#define VERTEX_SHADER_CODE "+cc->vertex+"\n";
String _code_globals = "#define VERTEX_SHADER_GLOBALS "+cc->vertex_globals+"\n";
code_string=_code_string.ascii();
code_globals=_code_globals.ascii();
DEBUG_PRINT( code_globals.get_data() );
DEBUG_PRINT( code_string.get_data() );
strings.push_back(code_globals);
strings.push_back(code_string);
}
#endif
strings.push_back(vertex_code0.get_data());
if (cc) {
material_string = cc->uniforms.ascii();
strings.push_back(material_string.get_data());
}
strings.push_back(vertex_code1.get_data());
if (cc) {
code_globals = cc->vertex_globals.ascii();
strings.push_back(code_globals.get_data());
}
strings.push_back(vertex_code2.get_data());
if (cc) {
code_string = cc->vertex.ascii();
strings.push_back(code_string.get_data());
}
strings.push_back(vertex_code3.get_data());
#ifdef DEBUG_SHADER
DEBUG_PRINT("\nVertex Code:\n\n" + String(code_string.get_data()));
for (int i = 0; i < strings.size(); i++) {
//print_line("vert strings "+itos(i)+":"+String(strings[i]));
}
#endif
v.vert_id = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(v.vert_id, strings.size(), &strings[0], NULL);
glCompileShader(v.vert_id);
GLint status;
glGetShaderiv(v.vert_id, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE) {
// error compiling
GLsizei iloglen;
glGetShaderiv(v.vert_id, GL_INFO_LOG_LENGTH, &iloglen);
if (iloglen < 0) {
glDeleteShader(v.vert_id);
glDeleteProgram(v.id);
v.id = 0;
ERR_PRINT("NO LOG, WTF");
} else {
if (iloglen == 0) {
iloglen = 4096; //buggy driver (Adreno 220+....)
}
char *ilogmem = (char *)memalloc(iloglen + 1);
ilogmem[iloglen] = 0;
glGetShaderInfoLog(v.vert_id, iloglen, &iloglen, ilogmem);
String err_string = get_shader_name() + ": Vertex Program Compilation Failed:\n";
err_string += ilogmem;
_display_error_with_code(err_string, strings);
memfree(ilogmem);
glDeleteShader(v.vert_id);
glDeleteProgram(v.id);
v.id = 0;
}
ERR_FAIL_V(NULL);
}
//_display_error_with_code("pepo", strings);
/* FRAGMENT SHADER */
strings.resize(strings_base_size);
//fragment precision is medium
strings.push_back("precision highp float;\n");
strings.push_back("precision highp int;\n");
strings.push_back("precision highp sampler2D;\n");
strings.push_back("precision highp samplerCube;\n");
strings.push_back("precision highp sampler2DArray;\n");
#if 0
if (cc) {
String _code_string = "#define FRAGMENT_SHADER_CODE "+cc->fragment+"\n";
String _code_globals = "#define FRAGMENT_SHADER_GLOBALS "+cc->fragment_globals+"\n";
code_string=_code_string.ascii();
code_globals=_code_globals.ascii();
DEBUG_PRINT( code_globals.get_data() );
DEBUG_PRINT( code_string.get_data() );
strings.push_back(code_globals);
strings.push_back(code_string);
}
#endif
strings.push_back(fragment_code0.get_data());
if (cc) {
material_string = cc->uniforms.ascii();
strings.push_back(material_string.get_data());
}
strings.push_back(fragment_code1.get_data());
if (cc) {
code_globals = cc->fragment_globals.ascii();
strings.push_back(code_globals.get_data());
}
strings.push_back(fragment_code2.get_data());
if (cc) {
code_string = cc->light.ascii();
strings.push_back(code_string.get_data());
}
strings.push_back(fragment_code3.get_data());
if (cc) {
code_string2 = cc->fragment.ascii();
strings.push_back(code_string2.get_data());
}
strings.push_back(fragment_code4.get_data());
#ifdef DEBUG_SHADER
DEBUG_PRINT("\nFragment Globals:\n\n" + String(code_globals.get_data()));
DEBUG_PRINT("\nFragment Code:\n\n" + String(code_string2.get_data()));
for (int i = 0; i < strings.size(); i++) {
//print_line("frag strings "+itos(i)+":"+String(strings[i]));
}
#endif
v.frag_id = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(v.frag_id, strings.size(), &strings[0], NULL);
glCompileShader(v.frag_id);
glGetShaderiv(v.frag_id, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE) {
// error compiling
GLsizei iloglen;
glGetShaderiv(v.frag_id, GL_INFO_LOG_LENGTH, &iloglen);
if (iloglen < 0) {
glDeleteShader(v.frag_id);
glDeleteShader(v.vert_id);
glDeleteProgram(v.id);
v.id = 0;
ERR_PRINT("NO LOG, WTF");
} else {
if (iloglen == 0) {
iloglen = 4096; //buggy driver (Adreno 220+....)
}
char *ilogmem = (char *)memalloc(iloglen + 1);
ilogmem[iloglen] = 0;
glGetShaderInfoLog(v.frag_id, iloglen, &iloglen, ilogmem);
String err_string = get_shader_name() + ": Fragment Program Compilation Failed:\n";
err_string += ilogmem;
_display_error_with_code(err_string, strings);
ERR_PRINT(err_string.ascii().get_data());
memfree(ilogmem);
glDeleteShader(v.frag_id);
glDeleteShader(v.vert_id);
glDeleteProgram(v.id);
v.id = 0;
}
ERR_FAIL_V(NULL);
}
glAttachShader(v.id, v.frag_id);
glAttachShader(v.id, v.vert_id);
// bind attributes before linking
for (int i = 0; i < attribute_pair_count; i++) {
glBindAttribLocation(v.id, attribute_pairs[i].index, attribute_pairs[i].name);
}
//if feedback exists, set it up
if (feedback_count) {
Vector<const char *> feedback;
for (int i = 0; i < feedback_count; i++) {
if (feedbacks[i].conditional == -1 || (1 << feedbacks[i].conditional) & conditional_version.version) {
//conditional for this feedback is enabled
print_line("tf varying: " + itos(feedback.size()) + " " + String(feedbacks[i].name));
feedback.push_back(feedbacks[i].name);
}
}
if (feedback.size()) {
glTransformFeedbackVaryings(v.id, feedback.size(), feedback.ptr(), GL_INTERLEAVED_ATTRIBS);
}
}
glLinkProgram(v.id);
glGetProgramiv(v.id, GL_LINK_STATUS, &status);
if (status == GL_FALSE) {
// error linking
GLsizei iloglen;
glGetProgramiv(v.id, GL_INFO_LOG_LENGTH, &iloglen);
if (iloglen < 0) {
glDeleteShader(v.frag_id);
glDeleteShader(v.vert_id);
glDeleteProgram(v.id);
v.id = 0;
ERR_FAIL_COND_V(iloglen <= 0, NULL);
}
if (iloglen == 0) {
iloglen = 4096; //buggy driver (Adreno 220+....)
}
char *ilogmem = (char *)Memory::alloc_static(iloglen + 1);
ilogmem[iloglen] = 0;
glGetProgramInfoLog(v.id, iloglen, &iloglen, ilogmem);
String err_string = get_shader_name() + ": Program LINK FAILED:\n";
err_string += ilogmem;
_display_error_with_code(err_string, strings);
ERR_PRINT(err_string.ascii().get_data());
Memory::free_static(ilogmem);
glDeleteShader(v.frag_id);
glDeleteShader(v.vert_id);
glDeleteProgram(v.id);
v.id = 0;
ERR_FAIL_V(NULL);
}
/* UNIFORMS */
glUseProgram(v.id);
//print_line("uniforms: ");
for (int j = 0; j < uniform_count; j++) {
v.uniform_location[j] = glGetUniformLocation(v.id, uniform_names[j]);
//print_line("uniform "+String(uniform_names[j])+" location "+itos(v.uniform_location[j]));
}
// set texture uniforms
for (int i = 0; i < texunit_pair_count; i++) {
GLint loc = glGetUniformLocation(v.id, texunit_pairs[i].name);
if (loc >= 0) {
if (texunit_pairs[i].index < 0) {
glUniform1i(loc, max_image_units + texunit_pairs[i].index); //negative, goes down
} else {
glUniform1i(loc, texunit_pairs[i].index);
}
}
}
// assign uniform block bind points
for (int i = 0; i < ubo_count; i++) {
GLint loc = glGetUniformBlockIndex(v.id, ubo_pairs[i].name);
if (loc >= 0)
glUniformBlockBinding(v.id, loc, ubo_pairs[i].index);
}
if (cc) {
v.texture_uniform_locations.resize(cc->texture_uniforms.size());
for (int i = 0; i < cc->texture_uniforms.size(); i++) {
v.texture_uniform_locations[i] = glGetUniformLocation(v.id, String(cc->texture_uniforms[i]).ascii().get_data());
glUniform1i(v.texture_uniform_locations[i], i + base_material_tex_index);
}
}
glUseProgram(0);
v.ok = true;
return &v;
}
GLint ShaderGLES3::get_uniform_location(const String &p_name) const {
ERR_FAIL_COND_V(!version, -1);
return glGetUniformLocation(version->id, p_name.ascii().get_data());
}
void ShaderGLES3::setup(const char **p_conditional_defines, int p_conditional_count, const char **p_uniform_names, int p_uniform_count, const AttributePair *p_attribute_pairs, int p_attribute_count, const TexUnitPair *p_texunit_pairs, int p_texunit_pair_count, const UBOPair *p_ubo_pairs, int p_ubo_pair_count, const Feedback *p_feedback, int p_feedback_count, const char *p_vertex_code, const char *p_fragment_code, int p_vertex_code_start, int p_fragment_code_start) {
ERR_FAIL_COND(version);
conditional_version.key = 0;
new_conditional_version.key = 0;
uniform_count = p_uniform_count;
conditional_count = p_conditional_count;
conditional_defines = p_conditional_defines;
uniform_names = p_uniform_names;
vertex_code = p_vertex_code;
fragment_code = p_fragment_code;
texunit_pairs = p_texunit_pairs;
texunit_pair_count = p_texunit_pair_count;
vertex_code_start = p_vertex_code_start;
fragment_code_start = p_fragment_code_start;
attribute_pairs = p_attribute_pairs;
attribute_pair_count = p_attribute_count;
ubo_pairs = p_ubo_pairs;
ubo_count = p_ubo_pair_count;
feedbacks = p_feedback;
feedback_count = p_feedback_count;
//split vertex and shader code (thank you, retarded shader compiler programmers from you know what company).
{
String globals_tag = "\nVERTEX_SHADER_GLOBALS";
String material_tag = "\nMATERIAL_UNIFORMS";
String code_tag = "\nVERTEX_SHADER_CODE";
String code = vertex_code;
int cpos = code.find(material_tag);
if (cpos == -1) {
vertex_code0 = code.ascii();
} else {
vertex_code0 = code.substr(0, cpos).ascii();
code = code.substr(cpos + material_tag.length(), code.length());
cpos = code.find(globals_tag);
if (cpos == -1) {
vertex_code1 = code.ascii();
} else {
vertex_code1 = code.substr(0, cpos).ascii();
String code2 = code.substr(cpos + globals_tag.length(), code.length());
cpos = code2.find(code_tag);
if (cpos == -1) {
vertex_code2 = code2.ascii();
} else {
vertex_code2 = code2.substr(0, cpos).ascii();
vertex_code3 = code2.substr(cpos + code_tag.length(), code2.length()).ascii();
}
}
}
}
{
String globals_tag = "\nFRAGMENT_SHADER_GLOBALS";
String material_tag = "\nMATERIAL_UNIFORMS";
String code_tag = "\nFRAGMENT_SHADER_CODE";
String light_code_tag = "\nLIGHT_SHADER_CODE";
String code = fragment_code;
int cpos = code.find(material_tag);
if (cpos == -1) {
fragment_code0 = code.ascii();
} else {
fragment_code0 = code.substr(0, cpos).ascii();
//print_line("CODE0:\n"+String(fragment_code0.get_data()));
code = code.substr(cpos + material_tag.length(), code.length());
cpos = code.find(globals_tag);
if (cpos == -1) {
fragment_code1 = code.ascii();
} else {
fragment_code1 = code.substr(0, cpos).ascii();
//print_line("CODE1:\n"+String(fragment_code1.get_data()));
String code2 = code.substr(cpos + globals_tag.length(), code.length());
cpos = code2.find(light_code_tag);
if (cpos == -1) {
fragment_code2 = code2.ascii();
} else {
fragment_code2 = code2.substr(0, cpos).ascii();
//print_line("CODE2:\n"+String(fragment_code2.get_data()));
String code3 = code2.substr(cpos + light_code_tag.length(), code2.length());
cpos = code3.find(code_tag);
if (cpos == -1) {
fragment_code3 = code3.ascii();
} else {
fragment_code3 = code3.substr(0, cpos).ascii();
//print_line("CODE3:\n"+String(fragment_code3.get_data()));
fragment_code4 = code3.substr(cpos + code_tag.length(), code3.length()).ascii();
//print_line("CODE4:\n"+String(fragment_code4.get_data()));
}
}
}
}
}
glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_image_units);
}
void ShaderGLES3::finish() {
const VersionKey *V = NULL;
while ((V = version_map.next(V))) {
Version &v = version_map[*V];
glDeleteShader(v.vert_id);
glDeleteShader(v.frag_id);
glDeleteProgram(v.id);
memdelete_arr(v.uniform_location);
}
}
void ShaderGLES3::clear_caches() {
const VersionKey *V = NULL;
while ((V = version_map.next(V))) {
Version &v = version_map[*V];
glDeleteShader(v.vert_id);
glDeleteShader(v.frag_id);
glDeleteProgram(v.id);
memdelete_arr(v.uniform_location);
}
version_map.clear();
custom_code_map.clear();
version = NULL;
last_custom_code = 1;
uniforms_dirty = true;
}
uint32_t ShaderGLES3::create_custom_shader() {
custom_code_map[last_custom_code] = CustomCode();
custom_code_map[last_custom_code].version = 1;
return last_custom_code++;
}
void ShaderGLES3::set_custom_shader_code(uint32_t p_code_id, const String &p_vertex, const String &p_vertex_globals, const String &p_fragment, const String &p_light, const String &p_fragment_globals, const String &p_uniforms, const Vector<StringName> &p_texture_uniforms, const Vector<CharString> &p_custom_defines) {
ERR_FAIL_COND(!custom_code_map.has(p_code_id));
CustomCode *cc = &custom_code_map[p_code_id];
cc->vertex = p_vertex;
cc->vertex_globals = p_vertex_globals;
cc->fragment = p_fragment;
cc->fragment_globals = p_fragment_globals;
cc->light = p_light;
cc->texture_uniforms = p_texture_uniforms;
cc->uniforms = p_uniforms;
cc->custom_defines = p_custom_defines;
cc->version++;
}
void ShaderGLES3::set_custom_shader(uint32_t p_code_id) {
new_conditional_version.code_version = p_code_id;
}
void ShaderGLES3::free_custom_shader(uint32_t p_code_id) {
/* if (! custom_code_map.has( p_code_id )) {
print_line("no code id "+itos(p_code_id));
} else {
print_line("freed code id "+itos(p_code_id));
}*/
ERR_FAIL_COND(!custom_code_map.has(p_code_id));
if (conditional_version.code_version == p_code_id)
conditional_version.code_version = 0; //bye
custom_code_map.erase(p_code_id);
}
void ShaderGLES3::set_base_material_tex_index(int p_idx) {
base_material_tex_index = p_idx;
}
ShaderGLES3::ShaderGLES3() {
version = NULL;
last_custom_code = 1;
uniforms_dirty = true;
base_material_tex_index = 0;
}
ShaderGLES3::~ShaderGLES3() {
finish();
}