X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fprogram.cpp;h=270dbdc3e5675163017349d0cef901fcffaccdf8;hp=b7f8577dc698c3190ba8e8b4dfd092c5e241772d;hb=e598e9d8dacad73b7ee1688e2be738e94b07b9fa;hpb=1431f24f29bd6862d547b831c40b2686ff56d1ef

diff --git a/source/program.cpp b/source/program.cpp
index b7f8577d..270dbdc3 100644
--- a/source/program.cpp
+++ b/source/program.cpp
@@ -1,12 +1,21 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
-#define GL_GLEXT_PROTOTYPES
+#include <algorithm>
+#include <cstring>
+#include <set>
+#include <msp/core/hash.h>
+#include <msp/core/maputils.h>
+#include <msp/gl/extensions/arb_shader_objects.h>
+#include <msp/gl/extensions/arb_uniform_buffer_object.h>
+#include <msp/gl/extensions/arb_vertex_shader.h>
+#include <msp/gl/extensions/ext_gpu_shader4.h>
+#include <msp/gl/extensions/nv_non_square_matrices.h>
+#include <msp/io/print.h>
+#include <msp/strings/format.h>
+#include "buffer.h"
+#include "error.h"
+#include "misc.h"
 #include "program.h"
+#include "programcompiler.h"
+#include "resources.h"
 #include "shader.h"
 
 using namespace std;
@@ -16,11 +25,57 @@ namespace GL {
 
 Program::Program()
 {
-	id=glCreateProgram();
+	init();
+}
+
+Program::Program(const ProgramBuilder::StandardFeatures &features)
+{
+	init();
+
+	ProgramBuilder builder(features);
+	builder.add_shaders(*this);
+	link();
+}
+
+Program::Program(const std::string &source)
+{
+	init();
+
+	ProgramCompiler compiler;
+	if(source.find(';')==string::npos && source.size()>5 && !source.compare(source.size()-5, 5, ".glsl"))
+	{
+		if(RefPtr<IO::Seekable> io = Resources::get_builtins().open(source))
+			compiler.compile(*io, source);
+		else
+			throw IO::file_not_found(source);
+	}
+	else
+		compiler.compile(source);
+	compiler.add_shaders(*this);
+	link();
+}
+
+Program::Program(const string &vert, const string &frag)
+{
+	init();
+
+	attach_shader_owned(new VertexShader(vert));
+	attach_shader_owned(new FragmentShader(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);
 }
 
@@ -33,9 +88,16 @@ void Program::attach_shader(Shader &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)
 {
-	list<Shader *>::iterator i=remove(shaders.begin(), shaders.end(), &shader);
+	ShaderList::iterator i = remove(shaders.begin(), shaders.end(), &shader);
 	if(i!=shaders.end())
 	{
 		shaders.erase(i, shaders.end());
@@ -43,30 +105,283 @@ void Program::detach_shader(Shader &shader)
 	}
 }
 
-bool Program::link()
+void Program::bind_attribute(unsigned index, const string &name)
+{
+	static Require _req(ARB_vertex_shader);
+	glBindAttribLocation(id, index, name.c_str());
+}
+
+void Program::bind_attribute(VertexComponent comp, const string &name)
+{
+	bind_attribute(get_component_type(comp), name);
+}
+
+void Program::bind_fragment_data(unsigned index, const string &name)
+{
+	static Require _req(EXT_gpu_shader4);
+	glBindFragDataLocation(id, index, name.c_str());
+}
+
+void Program::link()
 {
-	for(list<Shader *>::iterator i=shaders.begin(); i!=shaders.end(); ++i)
-		if(!(*i)->get_compiled() && !(*i)->compile())
-			return false;
+	for(ShaderList::iterator i=shaders.begin(); i!=shaders.end(); ++i)
+		if(!(*i)->is_compiled())
+			(*i)->compile();
+
+	uniforms.clear();
+	legacy_vars = false;
 
 	glLinkProgram(id);
-	linked=get_param(GL_LINK_STATUS);
-	return linked;
+	linked = get_program_i(id, GL_LINK_STATUS);
+	if(!linked)
+		throw compile_error(get_info_log());
+
+#ifdef DEBUG
+	std::string info_log = get_info_log();
+	if(!info_log.empty())
+		IO::print("Program link info log:\n%s", info_log);
+#endif
+
+	unsigned count = get_program_i(id, GL_ACTIVE_UNIFORMS);
+	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, sizeof(name), &len, &size, &type, name);
+		if(len && strncmp(name, "gl_", 3))
+		{
+			/* Some implementations report the first element of a uniform array,
+			others report just the name of the array itself. */
+			if(len>3 && !strcmp(name+len-3, "[0]"))
+				name[len-3] = 0;
+
+			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;
+		}
+		else
+			legacy_vars = true;
+	}
+
+	count = get_program_i(id, GL_ACTIVE_ATTRIBUTES);
+	for(unsigned i=0; i<count; ++i)
+	{
+		char name[128];
+		int len = 0;
+		int size;
+		GLenum type;
+		glGetActiveAttrib(id, i, sizeof(name), &len, &size, &type, name);
+		if(len && !strncmp(name, "gl_", 3))
+			legacy_vars = true;
+	}
+
+	if(ARB_uniform_buffer_object)
+	{
+		uniform_blocks.clear();
+
+		std::set<unsigned> used_bind_points;
+		count = get_program_i(id, GL_ACTIVE_UNIFORM_BLOCKS);
+		for(unsigned i=0; i<count; ++i)
+		{
+			char name[128];
+			int len;
+			glGetActiveUniformBlockName(id, i, sizeof(name), &len, name);
+			UniformBlockInfo &info = uniform_blocks[name];
+			info.name = name;
+
+			int value;
+			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[indices2[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[indices2[j]]->matrix_stride = values[j];
+			}
+
+			sort(info.uniforms.begin(), info.uniforms.end(), uniform_location_compare);
+			info.layout_hash = compute_layout_hash(info.uniforms);
+			unsigned n_bindings = BufferRange::get_n_uniform_buffer_bindings();
+			info.bind_point = info.layout_hash%n_bindings;
+			while(used_bind_points.count(info.bind_point))
+				info.bind_point = (info.bind_point+1)%n_bindings;
+			glUniformBlockBinding(id, i, info.bind_point);
+			used_bind_points.insert(info.bind_point);
+		}
+	}
+
+	UniformBlockInfo &default_block = uniform_blocks[string()];
+	default_block.data_size = 0;
+	default_block.bind_point = -1;
+
+	for(UniformMap::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
+		if(!i->second.block)
+		{
+			i->second.location = glGetUniformLocation(id, i->second.name.c_str());
+			i->second.block = &default_block;
+			default_block.uniforms.push_back(&i->second);
+		}
+
+	default_block.layout_hash = compute_layout_hash(default_block.uniforms);
+
+	string layout_descriptor;
+	for(UniformBlockMap::const_iterator i=uniform_blocks.begin(); i!=uniform_blocks.end(); ++i)
+		layout_descriptor += format("%d:%x\n", i->second.bind_point, i->second.layout_hash);
+	uniform_layout_hash = hash32(layout_descriptor);
 }
 
-int Program::get_param(GLenum param) const
+Program::LayoutHash Program::compute_layout_hash(const vector<const UniformInfo *> &uniforms)
 {
-	int value;
-	glGetProgramiv(id, param, &value);
-	return value;
+	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
 {
-	sizei len=get_param(GL_INFO_LOG_LENGTH);
-	char log[len+1];
-	glGetProgramInfoLog(id, len+1, reinterpret_cast<GLsizei *>(&len), log);
-	return string(log, len);
+	GLsizei len = get_program_i(id, GL_INFO_LOG_LENGTH);
+	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
+{
+	if(n[n.size()-1]==']')
+		throw invalid_argument("Program::get_uniform_location");
+
+	UniformMap::const_iterator i = uniforms.find(n);
+	if(i==uniforms.end())
+		return -1;
+
+	return i->second.block->bind_point<0 ? i->second.location : -1;
+}
+
+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::Loader::Loader(Program &p):
+	DataFile::ObjectLoader<Program>(p)
+{
+	add("attribute",       &Loader::attribute);
+	add("fragment_shader", &Loader::fragment_shader);
+	add("geometry_shader", &Loader::geometry_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 FragmentShader(src));
+}
+
+void Program::Loader::geometry_shader(const string &src)
+{
+	obj.attach_shader_owned(new GeometryShader(src));
+}
+
+void Program::Loader::standard()
+{
+	ProgramBuilder::StandardFeatures feat;
+	load_sub(feat);
+	ProgramBuilder builder(feat);
+	builder.add_shaders(obj);
+}
+
+void Program::Loader::vertex_shader(const string &src)
+{
+	obj.attach_shader_owned(new VertexShader(src));
 }
 
 } // namespace GL