X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Ftexture3d.cpp;h=03c58d0afdf05e6273cfbbea2892ea2d7e067ca9;hp=c38b44652d366c4c13fa9cd18bf3928de8da9080;hb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;hpb=a80b074c70ec991f27114efd13686038cf42c493

diff --git a/source/texture3d.cpp b/source/texture3d.cpp
index c38b4465..03c58d0a 100644
--- a/source/texture3d.cpp
+++ b/source/texture3d.cpp
@@ -1,89 +1,228 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #include <cmath>
-#include "except.h"
-#include "extension.h"
-#include "ilwrap.h"
+#include <msp/core/raii.h>
+#include <msp/gl/extensions/arb_direct_state_access.h>
+#include <msp/gl/extensions/arb_texture_storage.h>
+#include <msp/gl/extensions/ext_texture3d.h>
+#include <msp/gl/extensions/ext_texture_array.h>
+#include <msp/graphics/image.h>
+#include "bindable.h"
+#include "error.h"
+#include "pixelstore.h"
 #include "texture3d.h"
-#include "version_1_2.h"
 
 using namespace std;
 
 namespace Msp {
 namespace GL {
 
+Texture3D::Texture3D(GLenum t):
+	Texture(t),
+	width(0),
+	height(0),
+	depth(0),
+	allocated(0)
+{ }
+
 Texture3D::Texture3D():
+	Texture(GL_TEXTURE_3D),
 	width(0),
 	height(0),
-	depth(0)
+	depth(0),
+	allocated(0)
 {
-	require_version(1, 3);
-
-	target=GL_TEXTURE_3D;
-	bind();
+	static Require _req(EXT_texture3D);
 }
 
-void Texture3D::storage(PixelFormat f, sizei w, sizei h, sizei d, int b)
+void Texture3D::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned dp, unsigned lv)
 {
 	if(width>0)
-		throw InvalidState("Textures may only be created once");
-	if(w==0 || h==0 || d==0)
-		throw InvalidParameterValue("Invalid texture dimensions");
-
-	width=w;
-	height=h;
-	depth=d;
-	ifmt=f;
-	border=b;
-
-	image(0, ifmt, GL_UNSIGNED_BYTE, 0);
+		throw invalid_operation("Texture3D::storage");
+	if(wd==0 || ht==0 || dp==0)
+		throw invalid_argument("Texture3D::storage");
+
+	set_format(fmt);
+	width = wd;
+	height = ht;
+	depth = dp;
+	levels = get_n_levels();
+	if(lv>0)
+		levels = min(levels, lv);
 }
 
-void Texture3D::image(int level, PixelFormat fmt, GLenum type, const void *data)
+void Texture3D::allocate(unsigned level)
 {
-	maybe_bind();
-	glTexImage3D(target, level, ifmt, width, height, depth, border, fmt, type, data);
+	if(width==0 || height==0 || depth==0)
+		throw invalid_operation("Texture3D::allocate");
+	if(level>=levels)
+		throw invalid_argument("Texture3D::allocate");
+	if(allocated&(1<<level))
+		return;
+
+	if(ARB_texture_storage)
+	{
+		Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
+		if(ARB_direct_state_access)
+			glTextureStorage3D(id, levels, storage_fmt, width, height, depth);
+		else
+			glTexStorage3D(target, levels, storage_fmt, width, height, depth);
+		apply_swizzle();
+		allocated |= (1<<levels)-1;
+	}
+	else
+		image(level, 0);
 }
 
-void Texture3D::load_image(const string &fn, int dp)
+void Texture3D::image(unsigned level, const void *data)
 {
-	Image img;
-	img.load_file(fn);
+	if(width==0 || height==0 || depth==0)
+		throw invalid_operation("Texture3D::image");
+
+	unsigned w = width;
+	unsigned h = height;
+	unsigned d = depth;
+	get_level_size(level, w, h, d);
+
+	if(ARB_texture_storage)
+		return sub_image(level, 0, 0, 0, w, h, d, data);
 
-	unsigned w=img.get_width();
-	unsigned h=img.get_height();
-	unsigned d=1;
+	BindRestore _bind(this);
 
-	if(dp==-1)
+	if(!allocated)
 	{
-		if(h%w)
-			throw IncompatibleData("Image height is not divisible by its width");
-		d=h/w;
-		h=w;
+		glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
+		apply_swizzle();
 	}
-	else if(dp==-2)
+
+	PixelComponents comp = get_components(storage_fmt);
+	DataType type = get_component_type(storage_fmt);
+	glTexImage3D(target, level, storage_fmt, width, height, depth, 0, comp, type, data);
+
+	allocated |= 1<<level;
+	if(auto_gen_mipmap && level==0)
 	{
-		for(d=h; d*d>h; d>>=2);
-		for(; d*d<h; ++d);
-		if(d*d!=h)
-			throw IncompatibleData("Could not find a square root of texture height");
-		h=d;
+		generate_mipmap();
+		allocated |= (1<<levels)-1;
 	}
-	else if(dp>0)
-		d=dp;
+}
+
+void Texture3D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
+{
+	if(comp!=get_components(format) || type!=get_component_type(format))
+		throw incompatible_data("Texture3D::image");
+	image(level, data);
+}
+
+void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data)
+{
+	if(width==0 || height==0 || depth==0)
+		throw invalid_operation("Texture3D::image");
+
+	Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
+	allocate(level);
+
+	PixelComponents comp = get_components(storage_fmt);
+	DataType type = get_component_type(storage_fmt);
+	if(ARB_direct_state_access)
+		glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, comp, type, data);
+	else
+		glTexSubImage3D(target, level, x, y, z, wd, ht, dp, comp, type, data);
+
+	if(auto_gen_mipmap && level==0)
+		generate_mipmap();
+}
+
+void Texture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, PixelComponents comp, DataType type, const void *data)
+{
+	if(comp!=get_components(format) || type!=get_component_type(format))
+		throw incompatible_data("Texture3D::sub_image");
+	sub_image(level, x, y, z, wd, ht, dp, data);
+}
+
+void Texture3D::image(const Graphics::Image &img, unsigned lv)
+{
+	unsigned w = img.get_width();
+	unsigned h = img.get_height();
+
+	if(h%w)
+		throw incompatible_data("Texture3D::load_image");
+	unsigned d = h/w;
+	h = w;
 
-	PixelFormat fmt=img.get_format();
+	PixelFormat fmt = pixelformat_from_image(img);
 	if(width==0)
-		storage(fmt, w, h, d, 0);
+		storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, h, d, lv);
 	else if(w!=width || h!=height || d!=depth)
-		throw IncompatibleData("Image does not match texture storage");
+		throw incompatible_data("Texture3D::load_image");
 
-	image(0, fmt, GL_UNSIGNED_INT, img.get_data());
+	PixelStore pstore = PixelStore::from_image(img);
+	BindRestore _bind_ps(pstore);
+
+	image(0, img.get_pixels());
+}
+
+unsigned Texture3D::get_n_levels() const
+{
+	unsigned s = max(width, height);
+	if(target!=GL_TEXTURE_2D_ARRAY)
+		s = max(s, depth);
+	unsigned n = 0;
+	for(; s; s>>=1, ++n) ;
+	return n;
+}
+
+void Texture3D::get_level_size(unsigned level, unsigned &w, unsigned &h, unsigned &d) const
+{
+	w >>= level;
+	h >>= level;
+	if(target!=GL_TEXTURE_2D_ARRAY)
+		d >>= level;
+
+	if(!w && (h || d))
+		w = 1;
+	if(!h && (w || d))
+		h = 1;
+	if(!d && (w || h))
+		d = 1;
+}
+
+UInt64 Texture3D::get_data_size() const
+{
+	return id ? width*height*depth*get_pixel_size(storage_fmt) : 0;
+}
+
+
+Texture3D::Loader::Loader(Texture3D &t):
+	DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t)
+{
+	init();
+}
+
+Texture3D::Loader::Loader(Texture3D &t, Collection &c):
+	DataFile::DerivedObjectLoader<Texture3D, Texture::Loader>(t, c)
+{
+	init();
+}
+
+void Texture3D::Loader::init()
+{
+	add("raw_data", &Loader::raw_data);
+	add("storage", &Loader::storage);
+	add("storage", &Loader::storage_levels);
+}
+
+void Texture3D::Loader::raw_data(const string &data)
+{
+	obj.image(0, data.data());
+}
+
+void Texture3D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h, unsigned d)
+{
+	obj.storage(fmt, w, h, d);
+}
+
+void Texture3D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned d, unsigned l)
+{
+	obj.storage(fmt, w, h, d, l);
 }
 
 } // namespace GL