X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fprogram.cpp;h=636988d75c75dd11f3728906cf3c761b31553b34;hb=9034e81679eeeaa3d1d5d643d3f924d9edb45a68;hp=1d08270fd50aca7abd45e18f9660213e09a24227;hpb=85facfb688035b5bbc9a3a87d080582fbf34930b;p=libs%2Fgl.git

diff --git a/source/program.cpp b/source/program.cpp
index 1d08270f..636988d7 100644
--- a/source/program.cpp
+++ b/source/program.cpp
@@ -1,11 +1,13 @@
-/* $Id$
-
-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 <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"
 
@@ -16,11 +18,40 @@ namespace GL {
 
 Program::Program()
 {
-	id=glCreateProgram();
+	init();
+}
+
+Program::Program(const ProgramBuilder::StandardFeatures &features)
+{
+	init();
+
+	ProgramBuilder builder(features);
+	builder.add_shaders(*this);
+	if(!features.transform)
+		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 +64,16 @@ 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());
@@ -43,35 +81,240 @@ void Program::detach_shader(Shader &shader)
 	}
 }
 
-void Program::bind_attribute(int index, const string &name)
+void Program::bind_attribute(unsigned index, const string &name)
 {
+	static Require _req(ARB_vertex_shader);
 	glBindAttribLocation(id, index, name.c_str());
 }
 
-bool Program::link()
+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();
 
 	glLinkProgram(id);
-	linked=get_param(GL_LINK_STATUS);
-	return linked;
+	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);
 }
 
-int Program::get_param(GLenum param) const
+unsigned 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 = 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::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 FragmentShader(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