X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Ftexturecube.cpp;h=b9a8f5dd02b8cacb73f63df7bce028a5920035cd;hp=e767423fe539f9ee92fd10dd5af8f1beaa6eebb4;hb=3c46227c280bc4cd8a4487c648f2f080d5b4f7ea;hpb=194f960f91041ebee44e2745627d5e480e893d82

diff --git a/source/texturecube.cpp b/source/texturecube.cpp
index e767423f..b9a8f5dd 100644
--- a/source/texturecube.cpp
+++ b/source/texturecube.cpp
@@ -13,6 +13,16 @@ using namespace std;
 namespace Msp {
 namespace GL {
 
+TextureCubeFace TextureCube::face_order[6] =
+{
+	POSITIVE_X,
+	NEGATIVE_X,
+	POSITIVE_Y,
+	NEGATIVE_Y,
+	POSITIVE_Z,
+	NEGATIVE_Z
+};
+
 Vector3 TextureCube::directions[6] =
 {
 	Vector3(1, 0, 0),
@@ -23,9 +33,18 @@ Vector3 TextureCube::directions[6] =
 	Vector3(0, 0, -1)
 };
 
+unsigned TextureCube::orientations[12] =
+{
+	5, 3,
+	4, 3,
+	0, 4,
+	0, 5,
+	0, 3,
+	1, 3
+};
+
 TextureCube::TextureCube():
 	Texture(GL_TEXTURE_CUBE_MAP),
-	ifmt(RGB),
 	size(0),
 	allocated(0)
 {
@@ -39,16 +58,14 @@ void TextureCube::storage(PixelFormat fmt, unsigned sz)
 	if(sz==0)
 		throw invalid_argument("TextureCube::storage");
 
-	if(MSP_sized_internal_formats)
-		fmt = get_sized_pixelformat(fmt);
-	require_pixelformat(fmt);
-
-	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;
 
@@ -81,7 +98,7 @@ void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, D
 		return sub_image(face, level, 0, 0, s, s, fmt, type, data);
 
 	BindRestore _bind(this);
-	glTexImage2D(face, level, ifmt, s, s, 0, fmt, type, data);
+	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;
@@ -101,7 +118,7 @@ void TextureCube::sub_image(TextureCubeFace face, unsigned level, int x, int y,
 	BindRestore _bind(this);
 	allocate(level);
 
-	glTexSubImage2D(face, level, x, y, wd, ht, fmt, type, data);
+	glTexSubImage2D(face, level, x, y, wd, ht, get_upload_format(fmt), type, data);
 
 	if(gen_mipmap && level==0)
 		auto_generate_mipmap();
@@ -166,58 +183,38 @@ unsigned TextureCube::get_level_size(unsigned level) const
 
 TextureCubeFace TextureCube::enumerate_faces(unsigned i)
 {
-	switch(i)
-	{
-	case 0: return POSITIVE_X;
-	case 1: return NEGATIVE_X;
-	case 2: return POSITIVE_Y;
-	case 3: return NEGATIVE_Y;
-	case 4: return POSITIVE_Z;
-	case 5: return NEGATIVE_Z;
-	default: throw out_of_range("TextureCube::enumerate_faces");
-	}
+	if(i>=6)
+		throw out_of_range("TextureCube::enumerate_faces");
+	return face_order[i];
 }
 
-const Vector3 &TextureCube::get_face_direction(TextureCubeFace face)
+unsigned TextureCube::get_face_index(TextureCubeFace face)
 {
 	switch(face)
 	{
-	case POSITIVE_X: return directions[0];
-	case NEGATIVE_X: return directions[1];
-	case POSITIVE_Y: return directions[2];
-	case NEGATIVE_Y: return directions[3];
-	case POSITIVE_Z: return directions[4];
-	case NEGATIVE_Z: return directions[5];
-	default: throw invalid_argument("TextureCube::get_face_direction");
+	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)
 {
-	switch(face)
-	{
-	case POSITIVE_X: return directions[5];
-	case NEGATIVE_X: return directions[4];
-	case POSITIVE_Y: return directions[0];
-	case NEGATIVE_Y: return directions[0];
-	case POSITIVE_Z: return directions[0];
-	case NEGATIVE_Z: return directions[1];
-	default: throw invalid_argument("TextureCube::get_s_direction");
-	}
+	return directions[orientations[get_face_index(face)*2]];
 }
 
 const Vector3 &TextureCube::get_t_direction(TextureCubeFace face)
 {
-	switch(face)
-	{
-	case POSITIVE_X: return directions[3];
-	case NEGATIVE_X: return directions[3];
-	case POSITIVE_Y: return directions[4];
-	case NEGATIVE_Y: return directions[5];
-	case POSITIVE_Z: return directions[3];
-	case NEGATIVE_Z: return directions[3];
-	default: throw invalid_argument("TextureCube::get_t_direction");
-	}
+	return directions[orientations[get_face_index(face)*2+1]];
 }
 
 Vector3 TextureCube::get_texel_direction(TextureCubeFace face, unsigned u, unsigned v)