+++ /dev/null
-#include <algorithm>
-#include <cstring>
-#include <msp/core/hash.h>
-#include <msp/core/maputils.h>
-#include <msp/strings/format.h>
-#include "arb_shader_objects.h"
-#include "arb_uniform_buffer_object.h"
-#include "arb_vertex_shader.h"
-#include "buffer.h"
-#include "error.h"
-#include "program.h"
-#include "shader.h"
-
-using namespace std;
-
-namespace {
-
-const char *standard_vertex_src[] =
-{
- "s", "uniform int shadow_unit;\n",
- "n", "attribute vec3 tangent;\n",
- "n", "attribute vec3 binormal;\n",
- "t|n", "varying vec2 v_texcoord;\n",
- "s", "varying vec3 v_shadowcoord;\n",
- "!lm", "varying vec4 v_color;\n",
- "l!n", "varying vec3 v_normal;\n",
- "l", "varying vec3 v_light_dir;\n",
- "p|e", "varying vec3 v_eye_dir;\n",
- "r", "vec4 transform_vertex(vec4);\n",
- "lr", "vec3 transform_normal(vec3);\n",
- 0, "void main()\n",
- 0, "{\n",
- "r", "\tvec4 eye_pos = transform_vertex(gl_Vertex);\n",
- "!r", "\tvec4 eye_pos = gl_ModelViewMatrix*gl_Vertex;\n",
- 0, "\tgl_Position = gl_ProjectionMatrix*eye_pos;\n",
- "lr", "\tvec3 eye_normal = transform_normal(gl_Normal);\n",
- "l!r", "\tvec3 eye_normal = gl_NormalMatrix*gl_Normal;\n",
- "l!n", "\tv_normal = eye_normal;\n",
- "nr", "\tvec3 eye_tangent = transform_normal(tangent);\n",
- "n!r", "\tvec3 eye_tangent = gl_NormalMatrix*tangent;\n",
- "nr", "\tvec3 eye_binormal = transform_normal(binormal);\n",
- "n!r", "\tvec3 eye_binormal = gl_NormalMatrix*binormal;\n",
- "l", "\tvec3 eye_light_dir = normalize(gl_LightSource[0].position.xyz-eye_pos.xyz*gl_LightSource[0].position.w);\n",
- "n", "\tv_light_dir = vec3(dot(eye_tangent, eye_light_dir), dot(eye_binormal, eye_light_dir), dot(eye_normal, eye_light_dir));\n",
- "l!n", "\tv_light_dir = eye_light_dir;\n",
- "p|e", "\tvec3 eye_dir = -normalize(eye_pos.xyz);\n",
- "p|en", "\tv_eye_dir = vec3(dot(eye_tangent, eye_dir), dot(eye_binormal, eye_dir), dot(eye_normal, eye_dir));\n",
- "p|e!n", "\tv_eye_dir = eye_dir;\n",
- "t|n", "\tv_texcoord = gl_MultiTexCoord0.xy;\n",
- "s", "\tv_shadowcoord = vec3(dot(gl_EyePlaneS[shadow_unit], eye_pos), dot(gl_EyePlaneT[shadow_unit], eye_pos), dot(gl_EyePlaneR[shadow_unit], eye_pos));\n",
- "!lm", "\tv_color = gl_Color;\n",
- 0, "}",
- 0, 0
-};
-
-const char *standard_fragment_src[] =
-{
- "t", "uniform sampler2D texture;\n",
- "n", "uniform sampler2D normalmap;\n",
- "s", "uniform sampler2DShadow shadow;\n",
- "e", "uniform samplerCube environment;\n",
- "e", "uniform float reflectivity;\n",
- "t|n", "varying vec2 v_texcoord;\n",
- "s", "varying vec3 v_shadowcoord;\n",
- "!lm", "varying vec4 v_color;\n",
- "l!n", "varying vec3 v_normal;\n",
- "l", "varying vec3 v_light_dir;\n",
- "p|e", "varying vec3 v_eye_dir;\n",
- 0, "void main()\n",
- 0, "{\n",
- "n", "\tvec3 n_normal = texture2D(normalmap, v_texcoord).xyz*2.0-1.0;\n",
- "l!n", "\tvec3 n_normal = normalize(v_normal);\n",
- "l", "\tfloat l_diffuse = max(dot(n_normal, normalize(v_light_dir)), 0.0);\n",
- "p", "\tvec3 half_dir = normalize(v_eye_dir+v_light_dir);\n",
- "p", "\tfloat l_specular = pow(max(dot(half_dir, n_normal), 0.0), gl_FrontMaterial.shininess);\n",
- "s", "\tfloat l_shadow = shadow2D(shadow, v_shadowcoord).r;\n",
- /* XXX This is incorrect with normal mapping, since the vectors are in TBN
- space but environment map is expected to be in eye space */
- "e", "\tvec4 reflection = textureCube(environment, n_normal*(dot(n_normal, v_eye_dir)*2.0)-v_eye_dir);\n",
- "t", "\tvec4 tex_sample = texture2D(texture, v_texcoord);\n",
- 0, "\tgl_FragColor.rgb = ",
- "!t!l!m", "vec3(1.0)",
- "t", "tex_sample.rgb",
- "l|mt", "*",
- "!lm", "v_color.rgb",
- "l", "((l_diffuse",
- "lm", "*gl_FrontLightProduct[0].diffuse.rgb",
- "p", "+l_specular",
- "pm", "*gl_FrontLightProduct[0].specular.rgb",
- "l", ")",
- "s", "*l_shadow",
- "lm", "+gl_FrontLightModelProduct.sceneColor.rgb",
- "l", ")",
- "e", "+reflection.rgb*reflectivity",
- 0, ";\n",
- 0, "\tgl_FragColor.a = ",
- "!m", "1.0",
- "!lm", "v_color.a",
- "lm", "gl_FrontMaterial.diffuse.a",
- "t", "*tex_sample.a",
- 0, ";\n",
- 0, "}\n",
- 0, 0
-};
-
-}
-
-namespace Msp {
-namespace GL {
-
-Program::Program()
-{
- init();
-}
-
-Program::Program(const StandardFeatures &features)
-{
- init();
-
- add_standard_shaders(features);
- if(!features.transform)
- link();
-}
-
-Program::Program(const string &vert, const string &frag)
-{
- init();
-
- attach_shader_owned(new Shader(VERTEX_SHADER, vert));
- attach_shader_owned(new Shader(FRAGMENT_SHADER, frag));
- link();
-}
-
-void Program::init()
-{
- static Require _req(ARB_shader_objects);
-
- linked = false;
- id = glCreateProgram();
-}
-
-Program::~Program()
-{
- for(ShaderList::iterator i=owned_data.begin(); i!=owned_data.end(); ++i)
- delete *i;
- glDeleteProgram(id);
-}
-
-void Program::attach_shader(Shader &shader)
-{
- if(find(shaders.begin(), shaders.end(), &shader)==shaders.end())
- {
- glAttachShader(id, shader.get_id());
- shaders.push_back(&shader);
- }
-}
-
-void Program::attach_shader_owned(Shader *shader)
-{
- attach_shader(*shader);
- if(find(owned_data.begin(), owned_data.end(), shader)==owned_data.end())
- owned_data.push_back(shader);
-}
-
-void Program::detach_shader(Shader &shader)
-{
- ShaderList::iterator i = remove(shaders.begin(), shaders.end(), &shader);
- if(i!=shaders.end())
- {
- shaders.erase(i, shaders.end());
- glDetachShader(id, shader.get_id());
- }
-}
-
-void Program::add_standard_shaders(const StandardFeatures &features)
-{
- string flags = features.create_flags();
- string vertex_src = process_standard_source(standard_vertex_src, flags);
- string fragment_src = process_standard_source(standard_fragment_src, flags);
- attach_shader_owned(new Shader(VERTEX_SHADER, vertex_src));
- attach_shader_owned(new Shader(FRAGMENT_SHADER, fragment_src));
-}
-
-string Program::process_standard_source(const char **source, const string &flags)
-{
- string result;
-
- for(unsigned i=0; source[i+1]; i+=2)
- {
- if(source[i])
- {
- bool cond = true;
- char oper = '&';
- for(const char *c=source[i]; *c; ++c)
- {
- if(*c>='a' && *c<='z')
- {
- bool found = (flags.find(*c)!=string::npos);
- if(oper=='|')
- cond = (cond || found);
- else if(oper=='!')
- cond = (cond && !found);
- else if(oper=='&')
- cond = (cond && found);
- oper = '&';
- }
- else
- oper = *c;
- }
-
- if(!cond)
- continue;
- }
-
- result += source[i+1];
- }
-
- return result;
-}
-
-void Program::bind_attribute(unsigned index, const string &name)
-{
- static Require _req(ARB_vertex_shader);
- glBindAttribLocation(id, index, name.c_str());
-}
-
-void Program::link()
-{
- for(ShaderList::iterator i=shaders.begin(); i!=shaders.end(); ++i)
- if(!(*i)->is_compiled())
- (*i)->compile();
-
- uniforms.clear();
-
- glLinkProgram(id);
- int value;
- glGetProgramiv(id, GL_LINK_STATUS, &value);
- if(!(linked = value))
- throw compile_error(get_info_log());
-
- glGetProgramiv(id, GL_ACTIVE_UNIFORMS, &value);
- unsigned count = value;
- vector<UniformInfo *> uniforms_by_index(count);
- for(unsigned i=0; i<count; ++i)
- {
- char name[128];
- int len = 0;
- int size;
- GLenum type;
- glGetActiveUniform(id, i, 128, &len, &size, &type, name);
- if(len && strncmp(name, "gl_", 3))
- {
- UniformInfo &info = uniforms[name];
- info.block = 0;
- info.name = name;
- info.size = size;
- info.array_stride = 0;
- info.matrix_stride = 0;
- info.type = type;
- uniforms_by_index[i] = &info;
- }
- }
-
- if(ARB_uniform_buffer_object)
- {
- glGetProgramiv(id, GL_ACTIVE_UNIFORM_BLOCKS, &value);
- count = value;
- for(unsigned i=0; i<count; ++i)
- {
- char name[128];
- int len;
- glGetActiveUniformBlockName(id, i, 128, &len, name);
- UniformBlockInfo &info = uniform_blocks[name];
- info.name = name;
-
- glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_DATA_SIZE, &value);
- info.data_size = value;
-
- glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS, &value);
- vector<int> indices(value);
- glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES, &indices[0]);
- for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
- {
- if(!uniforms_by_index[*j])
- throw logic_error("Program::link");
- info.uniforms.push_back(uniforms_by_index[*j]);
- uniforms_by_index[*j]->block = &info;
- }
-
- vector<unsigned> indices2(indices.begin(), indices.end());
- vector<int> values(indices.size());
- glGetActiveUniformsiv(id, indices.size(), &indices2[0], GL_UNIFORM_OFFSET, &values[0]);
- for(unsigned j=0; j<indices.size(); ++j)
- uniforms_by_index[indices[j]]->location = values[j];
-
- indices2.clear();
- for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
- if(uniforms_by_index[*j]->size>1)
- indices2.push_back(*j);
- if(!indices2.empty())
- {
- glGetActiveUniformsiv(id, indices2.size(), &indices2[0], GL_UNIFORM_ARRAY_STRIDE, &values[0]);
- for(unsigned j=0; j<indices2.size(); ++j)
- uniforms_by_index[indices[j]]->array_stride = values[j];
- }
-
- indices2.clear();
- for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
- {
- GLenum t = uniforms_by_index[*j]->type;
- if(t==GL_FLOAT_MAT4 || t==GL_FLOAT_MAT3 || t==GL_FLOAT_MAT2 ||
- t==GL_FLOAT_MAT2x3 || t==GL_FLOAT_MAT2x4 || t==GL_FLOAT_MAT3x2 ||
- t==GL_FLOAT_MAT3x4 || t==GL_FLOAT_MAT4x2 || t==GL_FLOAT_MAT4x3)
- indices2.push_back(*j);
- }
- if(!indices2.empty())
- {
- glGetActiveUniformsiv(id, indices2.size(), &indices2[0], GL_UNIFORM_MATRIX_STRIDE, &values[0]);
- for(unsigned j=0; j<indices2.size(); ++j)
- uniforms_by_index[indices[j]]->matrix_stride = values[j];
- }
-
- sort(info.uniforms.begin(), info.uniforms.end(), uniform_location_compare);
- info.layout_hash = compute_layout_hash(info.uniforms);
- info.bind_point = info.layout_hash%BufferRange::get_n_uniform_buffer_bindings();
- glUniformBlockBinding(id, i, info.bind_point);
- }
- }
-
- vector<const UniformInfo *> blockless_uniforms;
- for(UniformMap::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
- if(!i->second.block)
- {
- i->second.location = glGetUniformLocation(id, i->second.name.c_str());
- blockless_uniforms.push_back(&i->second);
- }
-
- uniform_layout_hash = compute_layout_hash(blockless_uniforms);
-}
-
-unsigned Program::compute_layout_hash(const vector<const UniformInfo *> &uniforms)
-{
- string layout_descriptor;
- for(vector<const UniformInfo *>::const_iterator i = uniforms.begin(); i!=uniforms.end(); ++i)
- layout_descriptor += format("%d:%s:%x:%d\n", (*i)->location, (*i)->name, (*i)->type, (*i)->size);
- return hash32(layout_descriptor);
-}
-
-bool Program::uniform_location_compare(const UniformInfo *uni1, const UniformInfo *uni2)
-{
- return uni1->location<uni2->location;
-}
-
-string Program::get_info_log() const
-{
- GLsizei len = 0;
- glGetProgramiv(id, GL_INFO_LOG_LENGTH, &len);
- char *buf = new char[len+1];
- glGetProgramInfoLog(id, len+1, &len, buf);
- string log(buf, len);
- delete[] buf;
- return log;
-}
-
-const Program::UniformBlockInfo &Program::get_uniform_block_info(const string &name) const
-{
- return get_item(uniform_blocks, name);
-}
-
-const Program::UniformInfo &Program::get_uniform_info(const string &name) const
-{
- return get_item(uniforms, name);
-}
-
-int Program::get_uniform_location(const string &n) const
-{
- UniformMap::const_iterator i = uniforms.find(n);
- if(i==uniforms.end())
- {
- if(n[n.size()-1]==']')
- {
- string::size_type open_bracket = n.rfind('[');
- if(open_bracket!=string::npos)
- {
- /* The requested name looks like an array. glGetActiveUniform only
- gives us the first element of the array, so try to look that up and
- add an offset. */
- unsigned offset = lexical_cast<unsigned>(n.substr(open_bracket+1, n.size()-2-open_bracket));
- i = uniforms.find(n.substr(0, open_bracket)+"[0]");
- if(i!=uniforms.end() && !i->second.block && offset<i->second.size)
- return i->second.location+offset;
- }
- }
- return -1;
- }
-
- return i->second.block ? -1 : i->second.location;
-}
-
-void Program::bind() const
-{
- if(!linked)
- throw invalid_operation("Program::bind");
-
- if(!set_current(this))
- return;
-
- glUseProgram(id);
-}
-
-void Program::unbind()
-{
- if(!set_current(0))
- return;
-
- glUseProgram(0);
-}
-
-
-Program::StandardFeatures::StandardFeatures():
- texture(false),
- material(false),
- lighting(false),
- specular(false),
- normalmap(false),
- shadow(false),
- reflection(false),
- transform(false)
-{ }
-
-string Program::StandardFeatures::create_flags() const
-{
- string flags;
- if(texture)
- flags += 't';
- if(material)
- flags += 'm';
- if(lighting)
- {
- flags += 'l';
- if(specular)
- flags += 'p';
- if(normalmap)
- flags += 'n';
- }
- if(shadow)
- flags += 's';
- if(reflection)
- flags += 'e';
- if(transform)
- flags += 'r';
-
- return flags;
-}
-
-
-Program::Loader::Loader(Program &p):
- DataFile::ObjectLoader<Program>(p)
-{
- add("attribute", &Loader::attribute);
- add("fragment_shader", &Loader::fragment_shader);
- add("standard", &Loader::standard);
- add("vertex_shader", &Loader::vertex_shader);
-}
-
-void Program::Loader::finish()
-{
- obj.link();
-}
-
-void Program::Loader::attribute(unsigned i, const string &n)
-{
- obj.bind_attribute(i, n);
-}
-
-void Program::Loader::fragment_shader(const string &src)
-{
- obj.attach_shader_owned(new Shader(FRAGMENT_SHADER, src));
-}
-
-void Program::Loader::standard()
-{
- StandardFeatures feat;
- load_sub(feat);
- obj.add_standard_shaders(feat);
-}
-
-void Program::Loader::vertex_shader(const string &src)
-{
- obj.attach_shader_owned(new Shader(VERTEX_SHADER, src));
-}
-
-
-Program::StandardFeatures::Loader::Loader(StandardFeatures &f):
- DataFile::ObjectLoader<StandardFeatures>(f)
-{
- add("lighting", &StandardFeatures::lighting);
- add("material", &StandardFeatures::material);
- add("normalmap", &StandardFeatures::normalmap);
- add("shadow", &StandardFeatures::shadow);
- add("specular", &StandardFeatures::specular);
- add("texture", &StandardFeatures::texture);
- add("transform", &StandardFeatures::transform);
-}
-
-} // namespace GL
-} // namespace Msp
projects / libs / gl.git / blobdiff