X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fvertexarray.cpp;h=5674bbe0ddda48472cc0423b5230fe754710b3fc;hp=5d5c244a04b6863c3b748c03197a65c97246408b;hb=97b8f0d945474582c2213b70418d399e5641f0d5;hpb=84bc56b96c21c831104a22e0cbd0f3b72ab5d8c3

diff --git a/source/vertexarray.cpp b/source/vertexarray.cpp
index 5d5c244a..5674bbe0 100644
--- a/source/vertexarray.cpp
+++ b/source/vertexarray.cpp
@@ -1,188 +1,278 @@
-#include <GL/gl.h>
+#include <msp/gl/extensions/arb_multitexture.h>
+#include <msp/gl/extensions/arb_vertex_shader.h>
+#include <msp/gl/extensions/msp_legacy_features.h>
+#include "buffer.h"
+#include "error.h"
+#include "gl.h"
+#include "mesh.h"
 #include "vertexarray.h"
-#include "vertexbuffer.h"
 
 using namespace std;
 
 namespace Msp {
 namespace GL {
 
-uint get_stride(VertexFormat f)
+bool VertexArray::legacy_used = false;
+
+VertexArray::VertexArray(const VertexFormat &f)
 {
-	uint stride=0;
-	for(uint fmt=f; fmt; fmt>>=4)
-		stride+=(fmt&3)+1;
-	return stride*sizeof(float);
+	reset(f);
 }
 
+VertexArray::~VertexArray()
+{
+	/* Unbind accesses the current VertexArray, so a call from ~Bindable would
+	try to access destroyed data. */
+	if(current()==this)
+		unbind();
+}
 
-VertexArrayBuilder::VertexArrayBuilder(VertexArray &a, vector<float> &d):
-	data(d),
-	array(a),
-	format(array.get_format()),
-	stride(get_stride(format)),
-	cr(1), cg(1), cb(1), ca(1),
-	ts(0), tt(0), tr(0), tq(0),
-	nx(0), ny(0), nz(1)
-{ }
-
-void VertexArrayBuilder::vertex(float x, float y, float z, float w)
+void VertexArray::reset(const VertexFormat &f)
 {
-	for(uint fmt=format; fmt; fmt>>=4)
+	clear();
+	format = f;
+	stride = get_stride(format);
+	legacy = false;
+
+	arrays.clear();
+
+	unsigned offs = 0;
+	for(const unsigned char *c=format.begin(); c!=format.end(); ++c)
 	{
-		uint size=(fmt&3)+1;
-		switch(fmt&12)
-		{
-		case 0:
-			data.push_back(x);
-			data.push_back(y);
-			if(size>=3) data.push_back(z);
-			if(size>=4) data.push_back(w);
-			break;
-		case 4:
-			data.push_back(nx);
-			data.push_back(ny);
-			data.push_back(nz);
-			break;
-		case 8:
-			data.push_back(ts);
-			if(size>=2) data.push_back(tt);
-			if(size>=3) data.push_back(tr);
-			if(size>=4) data.push_back(tq);
-			break;
-		case 12:
-			if(size==1)
-			{
-				union { ubyte c[4]; float f; } u;
-				u.c[0]=(ubyte)(cr*255);
-				u.c[1]=(ubyte)(cg*255);
-				u.c[2]=(ubyte)(cb*255);
-				u.c[3]=(ubyte)(ca*255);
-				data.push_back(u.f);
-			}
-			else
-			{
-				data.push_back(cr);
-				data.push_back(cg);
-				data.push_back(cb);
-				if(size>=4) data.push_back(ca);
-			}
-			break;
-		}
+		unsigned slot = get_array_slot(*c);
+		if(slot>=arrays.size())
+			arrays.resize(slot+1);
+
+		Array &arr = arrays[slot];
+		arr.component = *c;
+		arr.offset = offs;
+
+		if(*c<ATTRIB1)
+			legacy = true;
+
+		offs += get_component_size(*c);
 	}
-	//cout<<"Added vertex with "<<data.size()-old_size<<" floats\n";
 }
 
-VertexArrayBuilder::~VertexArrayBuilder()
+unsigned VertexArray::get_array_slot(unsigned char comp)
 {
-	array.update_data();
+	unsigned t = get_component_type(comp);
+	if(t==get_component_type(VERTEX3))
+		return 0;
+	else if(t==get_component_type(NORMAL3))
+		return 1;
+	else if(t==get_component_type(COLOR4_FLOAT))
+		return 2;
+	else if(comp>=TEXCOORD1 && comp<=TEXCOORD4+12)
+	{
+		t -= get_component_type(TEXCOORD1);
+		if(t>0)
+			static Require _req(ARB_multitexture);
+		return 3+t;
+	}
+	else
+	{
+		static Require _req(ARB_vertex_shader);
+		if(comp>=ATTRIB1)
+			t -= get_component_type(ATTRIB1);
+		return 7+t;
+	}
 }
 
-
-VertexArray::VertexArray(VertexFormat f):
-	format(NODATA),
-	stride(get_stride(f)),
-	vbuf(0),
-	own_vbuf(false)
+void VertexArray::clear()
 {
-	// Reverse the format so the first item is in lowest bits
-	for(uint fmt=f; fmt; fmt>>=4)
-		format=(format, static_cast<VertexFormat>(fmt&15));
+	data.clear();
 }
 
-VertexArray::~VertexArray()
+void VertexArray::reserve(unsigned n)
 {
-	if(own_vbuf)
-		delete vbuf;
+	data.reserve(n*stride);
 }
 
-void VertexArray::use_vertex_buffer()
+float *VertexArray::append()
 {
-	if(vbuf) return;
-
-	vbuf=new VertexBuffer();
-	own_vbuf=true;
-	update_data();
+	data.insert(data.end(), stride, 0.0f);
+	update_offset();
+	dirty = true;
+	return &*(data.end()-stride);
 }
 
-void VertexArray::use_vertex_buffer(VertexBuffer *b)
+float *VertexArray::modify(unsigned i)
 {
-	if(vbuf) return;
-
-	vbuf=b;
-	update_data();
+	dirty = true;
+	return &data[0]+i*stride;
 }
 
-void VertexArray::clear()
+unsigned VertexArray::get_data_size() const
 {
-	data.clear();
+	return data.size()*sizeof(float);
 }
 
-void VertexArray::apply() const
+void VertexArray::apply(bool use_legacy) const
 {
-	if(vbuf) vbuf->bind();
+	if(format.empty())
+		throw invalid_operation("VertexArray::apply");
+	// Don't mess up the vertex array object of a mesh
+	if(Mesh::current())
+		throw invalid_operation("VertexArray::apply");
+
+	/* Unbind first if the legacy flag changes.  The logic for supporting it
+	directly in apply_arrays would get too complicated, and this also allows
+	rebinding the same array with different legacy setting. */
+	if(legacy_used!=use_legacy)
+		unbind();
+
+	if(!use_legacy)
+		static Require _req(ARB_vertex_shader);
+	else if(legacy)
+		static Require _req(MSP_legacy_features);
 
-	const float *base=vbuf?0:&data[0];
-	uint offset=0;
-	uint found=0;
-	for(uint fmt=format; fmt; fmt>>=4)
+	const VertexArray *old = current();
+	/* If the array has been modified, apply it even if it was the last one to
+	be applied.  This is necessary to get the data updated to vertex buffer, and
+	to resync things after a format change.  Radeon drivers also have some
+	problems with modifying vertex arrays without re-setting the pointers. */
+	if(!set_current(this) && !dirty)
+		return;
+
+	Buffer *vbuf = get_buffer();
+	Bind _bind_vbuf(vbuf, ARRAY_BUFFER);
+	if(vbuf && dirty)
+		update_buffer();
+
+	const float *base = (vbuf ? reinterpret_cast<float *>(get_offset()) : &data[0]);
+	unsigned stride_bytes = stride*sizeof(float);
+	apply_arrays(&arrays, (old ? &old->arrays : 0), base, stride_bytes, use_legacy);
+}
+
+void VertexArray::apply_arrays(const vector<Array> *arrays, const vector<Array> *old_arrays, const float *base, unsigned stride_bytes, bool use_legacy)
+{
+	unsigned active_tex = 0;
+	unsigned n_arrays = arrays ? arrays->size() : 0;
+	if(old_arrays)
+		n_arrays = max<unsigned>(n_arrays, old_arrays->size());
+	for(unsigned i=0; i<n_arrays; ++i)
 	{
-		uint size=(fmt&3)+1;
-		switch(fmt&12)
+		const Array *arr = ((arrays && i<arrays->size() && (*arrays)[i].component) ? &(*arrays)[i] : 0);
+		const Array *old_arr = ((old_arrays && i<old_arrays->size() && (*old_arrays)[i].component) ? &(*old_arrays)[i] : 0);
+		if(!arr && !old_arr)
+			continue;
+
+		unsigned char comp = (arr ? arr->component : old_arr->component);
+		unsigned sz = get_component_size(comp);
+		unsigned t = get_component_type(comp);
+		if(use_legacy)
+		{
+			GLenum array_type = 0;
+			if(t==get_component_type(VERTEX3))
+			{
+				if(arr)
+					glVertexPointer(sz, GL_FLOAT, stride_bytes, base+arr->offset);
+				array_type = GL_VERTEX_ARRAY;
+			}
+			else if(t==get_component_type(NORMAL3))
+			{
+				if(arr)
+					glNormalPointer(GL_FLOAT, stride_bytes, base+arr->offset);
+				array_type = GL_NORMAL_ARRAY;
+			}
+			else if(t==get_component_type(COLOR4_FLOAT))
+			{
+				if(arr)
+				{
+					if(sz==1)
+						glColorPointer(4, GL_UNSIGNED_BYTE, stride_bytes, base+arr->offset);
+					else
+						glColorPointer(sz, GL_FLOAT, stride_bytes, base+arr->offset);
+				}
+				array_type = GL_COLOR_ARRAY;
+			}
+			else if(comp>=TEXCOORD1 && comp<=TEXCOORD4+12)
+			{
+				t -= get_component_type(TEXCOORD1);
+				if(t>0 || active_tex)
+				{
+					glClientActiveTexture(GL_TEXTURE0+t);
+					active_tex = t;
+				}
+				if(arr)
+					glTexCoordPointer(sz, GL_FLOAT, stride_bytes, base+arr->offset);
+				array_type = GL_TEXTURE_COORD_ARRAY;
+			}
+
+			if(array_type)
+			{
+				// Only change enable state if needed
+				if(arr && !old_arr)
+					glEnableClientState(array_type);
+				else if(old_arr && !arr)
+					glDisableClientState(array_type);
+
+				continue;
+			}
+		}
+
+		if(t>=get_component_type(ATTRIB1))
+			t -= get_component_type(ATTRIB1);
+		if(arr)
 		{
-		case 0:
-			glVertexPointer(size, GL_FLOAT, stride, base+offset);
-			break;
-		case 4:
-			glNormalPointer(GL_FLOAT, stride, base+offset);
-			break;
-		case 8:
-			glTexCoordPointer(size, GL_FLOAT, stride, base+offset);
-			break;
-		case 12:
-			if(size==1)
-				glColorPointer(4, GL_UNSIGNED_BYTE, stride, base+offset);
+			if(arr->component==COLOR4_UBYTE)
+				glVertexAttribPointer(t, 4, GL_UNSIGNED_BYTE, true, stride_bytes, base+arr->offset);
 			else
-				glColorPointer(size, GL_FLOAT, stride, base+offset);
-			break;
+				glVertexAttribPointer(t, sz, GL_FLOAT, false, stride_bytes, base+arr->offset);
 		}
-		found|=1<<((fmt&12)>>2);
-		offset+=size;
+
+		// Only change enable state if needed
+		if(arr && !old_arr)
+			glEnableVertexAttribArray(t);
+		else if(old_arr && !arr)
+			glDisableVertexAttribArray(t);
 	}
 
-	set_array(GL_VERTEX_ARRAY, found&1, 1);
-	set_array(GL_NORMAL_ARRAY, found&2, 2);
-	set_array(GL_TEXTURE_COORD_ARRAY, found&4, 4);
-	set_array(GL_COLOR_ARRAY, found&8, 8);
+	if(active_tex)
+		glClientActiveTexture(GL_TEXTURE0);
 
-	VertexBuffer::unbind();
+	legacy_used = use_legacy;
 }
 
-/**
-Updates the VertexArray data to the VertexBuffer tied to the array, if any.
-*/
-void VertexArray::update_data()
+void VertexArray::unbind()
 {
-	if(vbuf)
-		vbuf->data(data.size()*sizeof(float), &data[0]);
+	const VertexArray *old = current();
+	if(set_current(0))
+		apply_arrays(0, &old->arrays, 0, 0, legacy_used);
 }
 
-void VertexArray::set_array(unsigned array, unsigned bit, unsigned mask) const
-{
-	if((enabled_arrays&mask) && !bit)
-	{
-		glDisableClientState(array);
-		enabled_arrays&=~mask;
-	}
-	else if(!(enabled_arrays&mask) && bit)
-	{
-		glEnableClientState(array);
-		enabled_arrays|=mask;
-	}
-}
 
-unsigned VertexArray::enabled_arrays=0;
+VertexArray::Array::Array():
+	component(0),
+	offset(0)
+{ }
+
 
+VertexArray::Loader::Loader(VertexArray &a):
+	VertexArrayBuilder(a)
+{
+	add("vertex2",   static_cast<void (Loader::*)(float, float)>(&Loader::vertex));
+	add("vertex3",   static_cast<void (Loader::*)(float, float, float)>(&Loader::vertex));
+	add("vertex4",   static_cast<void (Loader::*)(float, float, float, float)>(&Loader::vertex));
+	add("normal3",   static_cast<void (Loader::*)(float, float, float)>(&Loader::normal));
+	add("texcoord1", static_cast<void (Loader::*)(float)>(&Loader::texcoord));
+	add("texcoord2", static_cast<void (Loader::*)(float, float)>(&Loader::texcoord));
+	add("texcoord3", static_cast<void (Loader::*)(float, float, float)>(&Loader::texcoord));
+	add("texcoord4", static_cast<void (Loader::*)(float, float, float, float)>(&Loader::texcoord));
+	add("multitexcoord1", static_cast<void (Loader::*)(unsigned, float)>(&Loader::multitexcoord));
+	add("multitexcoord2", static_cast<void (Loader::*)(unsigned, float, float)>(&Loader::multitexcoord));
+	add("multitexcoord3", static_cast<void (Loader::*)(unsigned, float, float, float)>(&Loader::multitexcoord));
+	add("multitexcoord4", static_cast<void (Loader::*)(unsigned, float, float, float, float)>(&Loader::multitexcoord));
+	add("color3",    static_cast<void (Loader::*)(float, float, float)>(&Loader::color));
+	add("color4",    static_cast<void (Loader::*)(float, float, float, float)>(&Loader::color));
+	add("attrib1",   static_cast<void (Loader::*)(unsigned, float)>(&Loader::attrib));
+	add("attrib2",   static_cast<void (Loader::*)(unsigned, float, float)>(&Loader::attrib));
+	add("attrib3",   static_cast<void (Loader::*)(unsigned, float, float, float)>(&Loader::attrib));
+	add("attrib4",   static_cast<void (Loader::*)(unsigned, float, float, float, float)>(&Loader::attrib));
+	add("tangent3",  static_cast<void (Loader::*)(float, float, float)>(&Loader::tangent));
+	add("binormal3", static_cast<void (Loader::*)(float, float, float)>(&Loader::binormal));
+}
 
 } // namespace GL
 } // namespace Msp