X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Ftexturecube.cpp;h=b9a8f5dd02b8cacb73f63df7bce028a5920035cd;hp=4a613a37fc948ffa61789a65d912e8b46685001a;hb=3c46227c280bc4cd8a4487c648f2f080d5b4f7ea;hpb=70153a4e27eeebc7e0a91de122f45eff6296cb71

diff --git a/source/texturecube.cpp b/source/texturecube.cpp
index 4a613a37..b9a8f5dd 100644
--- a/source/texturecube.cpp
+++ b/source/texturecube.cpp
@@ -1,35 +1,54 @@
+#include <msp/datafile/collection.h>
+#include <msp/gl/extensions/arb_texture_cube_map.h>
+#include <msp/gl/extensions/arb_texture_storage.h>
+#include <msp/io/memory.h>
+#include <msp/strings/format.h>
 #include "bindable.h"
 #include "error.h"
-#include "extension.h"
+#include "pixelstore.h"
 #include "texturecube.h"
 
 using namespace std;
 
-namespace {
+namespace Msp {
+namespace GL {
 
-// An array to facilitate looping through the cube faces
-Msp::GL::TextureCubeFace faces[6] =
+TextureCubeFace TextureCube::face_order[6] =
 {
-	Msp::GL::POSITIVE_X,
-	Msp::GL::NEGATIVE_X,
-	Msp::GL::POSITIVE_Y,
-	Msp::GL::NEGATIVE_Y,
-	Msp::GL::POSITIVE_Z,
-	Msp::GL::NEGATIVE_Z
+	POSITIVE_X,
+	NEGATIVE_X,
+	POSITIVE_Y,
+	NEGATIVE_Y,
+	POSITIVE_Z,
+	NEGATIVE_Z
 };
 
-}
-
+Vector3 TextureCube::directions[6] =
+{
+	Vector3(1, 0, 0),
+	Vector3(-1, 0, 0),
+	Vector3(0, 1, 0),
+	Vector3(0, -1, 0),
+	Vector3(0, 0, 1),
+	Vector3(0, 0, -1)
+};
 
-namespace Msp {
-namespace GL {
+unsigned TextureCube::orientations[12] =
+{
+	5, 3,
+	4, 3,
+	0, 4,
+	0, 5,
+	0, 3,
+	1, 3
+};
 
 TextureCube::TextureCube():
 	Texture(GL_TEXTURE_CUBE_MAP),
 	size(0),
 	allocated(0)
 {
-	static RequireVersion _ver(1, 3);
+	static Require _req(ARB_texture_cube_map);
 }
 
 void TextureCube::storage(PixelFormat fmt, unsigned sz)
@@ -39,17 +58,31 @@ void TextureCube::storage(PixelFormat fmt, unsigned sz)
 	if(sz==0)
 		throw invalid_argument("TextureCube::storage");
 
-	ifmt = fmt;
+	set_internal_format(fmt);
 	size = sz;
 }
 
 void TextureCube::allocate(unsigned level)
 {
+	if(size==0)
+		throw invalid_operation("TextureCube::allocate");
 	if(allocated&(1<<level))
 		return;
 
-	for(unsigned i=0; i<6; ++i)
-		image(faces[i], level, get_base_pixelformat(ifmt), UNSIGNED_BYTE, 0);
+	if(ARB_texture_storage)
+	{
+		BindRestore _bind(this);
+		unsigned n_levels = (is_mipmapped(min_filter) ? get_n_levels() : 1);
+		glTexStorage2D(target, n_levels, ifmt, size, size);
+		allocated |= (1<<n_levels)-1;
+	}
+	else
+	{
+		PixelFormat base_fmt = get_base_pixelformat(ifmt);
+		DataType type = get_alloc_type(base_fmt);
+		for(unsigned i=0; i<6; ++i)
+			image(enumerate_faces(i), level, base_fmt, type, 0);
+	}
 }
 
 void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, DataType type, const void *data)
@@ -59,24 +92,216 @@ void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, D
 
 	unsigned s = get_level_size(level);
 	if(s==0)
-		throw invalid_argument("TextureCube::image");
+		throw out_of_range("TextureCube::image");
 
-	Bind _bind(this, true);
-	glTexImage2D(face, level, ifmt, s, s, 0, fmt, type, data);
+	if(ARB_texture_storage)
+		return sub_image(face, level, 0, 0, s, s, fmt, type, data);
+
+	BindRestore _bind(this);
+	glTexImage2D(face, level, ifmt, s, s, 0, get_upload_format(fmt), type, data);
 
 	// XXX Allocation should be tracked per-face, but we'll run out of bits
 	allocated |= 1<<level;
 	if(gen_mipmap && level==0)
 	{
-		for(; s; s>>=1, ++level) ;
-		allocated |= (1<<level)-1;
+		// TODO Only do this once all faces are created
+		auto_generate_mipmap();
+		allocated |= (1<<get_n_levels())-1;
 	}
 }
 
-unsigned TextureCube::get_level_size(unsigned level)
+void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y, unsigned wd, unsigned ht, PixelFormat fmt, DataType type, const void *data)
+{
+	if(size==0)
+		throw invalid_operation("TextureCube::sub_image");
+
+	BindRestore _bind(this);
+	allocate(level);
+
+	glTexSubImage2D(face, level, x, y, wd, ht, get_upload_format(fmt), type, data);
+
+	if(gen_mipmap && level==0)
+		auto_generate_mipmap();
+}
+
+void TextureCube::image(TextureCubeFace face, const Graphics::Image &img, bool srgb)
+{
+	unsigned w = img.get_width();
+	unsigned h = img.get_height();
+	PixelFormat fmt = pixelformat_from_graphics(img.get_format());
+	if(size==0)
+	{
+		if(w!=h)
+			throw incompatible_data("TextureCube::image");
+
+		storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
+	}
+	else if(w!=size || h!=size)
+		throw incompatible_data("TextureCube::image");
+
+	PixelStore pstore = PixelStore::from_image(img);
+	BindRestore _bind_ps(pstore);
+
+	image(face, 0, fmt, UNSIGNED_BYTE, img.get_data());
+}
+
+void TextureCube::image(const Graphics::Image &img, bool srgb)
+{
+	unsigned w = img.get_width();
+	unsigned h = img.get_height();
+
+	if(h!=w*6)
+		throw incompatible_data("TextureCube::image");
+	h /= 6;
+
+	PixelFormat fmt = pixelformat_from_graphics(img.get_format());
+	if(size==0)
+		storage(storage_pixelformat_from_graphics(img.get_format(), srgb), w);
+	else if(w!=size || h!=size)
+		throw incompatible_data("TextureCube::image");
+
+	PixelStore pstore = PixelStore::from_image(img);
+	BindRestore _bind_ps(pstore);
+
+	const char *cdata = reinterpret_cast<const char *>(img.get_data());
+	unsigned face_size = img.get_stride()*size;
+	for(unsigned i=0; i<6; ++i)
+		image(enumerate_faces(i), 0, fmt, UNSIGNED_BYTE, cdata+i*face_size);
+}
+
+unsigned TextureCube::get_n_levels() const
+{
+	unsigned n = 0;
+	for(unsigned s=size; s; s>>=1, ++n) ;
+	return n;
+}
+
+unsigned TextureCube::get_level_size(unsigned level) const
 {
 	return size>>level;
 }
 
+TextureCubeFace TextureCube::enumerate_faces(unsigned i)
+{
+	if(i>=6)
+		throw out_of_range("TextureCube::enumerate_faces");
+	return face_order[i];
+}
+
+unsigned TextureCube::get_face_index(TextureCubeFace face)
+{
+	switch(face)
+	{
+	case POSITIVE_X: return 0;
+	case NEGATIVE_X: return 1;
+	case POSITIVE_Y: return 2;
+	case NEGATIVE_Y: return 3;
+	case POSITIVE_Z: return 4;
+	case NEGATIVE_Z: return 5;
+	default: throw invalid_argument("TextureCube::get_face_index");
+	}
+}
+
+const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
+{
+	return directions[get_face_index(face)];
+}
+
+const Vector3 &TextureCube::get_s_direction(TextureCubeFace face)
+{
+	return directions[orientations[get_face_index(face)*2]];
+}
+
+const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
+{
+	return directions[orientations[get_face_index(face)*2+1]];
+}
+
+Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)
+{
+	float s = (u+0.5f)*2.0f/size-1.0f;
+	float t = (v+0.5f)*2.0f/size-1.0f;
+	const Vector3 &fv = get_face_direction(face);
+	const Vector3 &sv = get_s_direction(face);
+	const Vector3 &tv = get_t_direction(face);
+	return fv+s*sv+t*tv;
+}
+
+UInt64 TextureCube::get_data_size() const
+{
+	return id ? size*size*6*get_pixel_size(ifmt) : 0;
+}
+
+
+TextureCube::Loader::Loader(TextureCube &t):
+	DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
+{
+	init();
+}
+
+TextureCube::Loader::Loader(TextureCube &t, Collection &c):
+	DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t, c)
+{
+	init();
+}
+
+void TextureCube::Loader::init()
+{
+	add("external_image", &Loader::external_image);
+	add("image_data", &Loader::image_data);
+	add("raw_data", &Loader::raw_data);
+	add("storage", &Loader::storage);
+}
+
+void TextureCube::Loader::external_image(TextureCubeFace face, const string &fn)
+{
+	Graphics::Image img;
+	RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
+	img.load_io(*io);
+
+	obj.image(face, img, srgb);
+}
+
+void TextureCube::Loader::image_data(TextureCubeFace face, const string &data)
+{
+	Graphics::Image img;
+	IO::Memory mem(data.data(), data.size());
+	img.load_io(mem);
+
+	obj.image(face, img, srgb);
+}
+
+void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
+{
+	obj.image(face, 0, get_base_pixelformat(obj.ifmt), UNSIGNED_BYTE, data.data());
+}
+
+void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
+{
+	if(srgb)
+		fmt = get_srgb_pixelformat(fmt);
+	obj.storage(fmt, s);
+}
+
+
+void operator>>(const LexicalConverter &conv, TextureCubeFace &face)
+{
+	const string &str = conv.get();
+	if(str=="POSITIVE_X")
+		face = POSITIVE_X;
+	else if(str=="NEGATIVE_X")
+		face = NEGATIVE_X;
+	else if(str=="POSITIVE_Y")
+		face = POSITIVE_Y;
+	else if(str=="NEGATIVE_Y")
+		face = NEGATIVE_Y;
+	else if(str=="POSITIVE_Z")
+		face = POSITIVE_Z;
+	else if(str=="NEGATIVE_Z")
+		face = NEGATIVE_Z;
+	else
+		throw lexical_error(format("conversion of '%s' to TextureCubeFace", str));
+}
+
 } // namespace GL
 } // namespace Msp