+#include <msp/gl/extensions/arb_texture_cube_map.h>
+#include <msp/io/memory.h>
+#include <msp/strings/format.h>
#include "bindable.h"
#include "error.h"
-#include "extension.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] =
+Vector3 TextureCube::directions[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
+ 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 {
-
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)
throw invalid_operation("TextureCube::storage");
if(sz==0)
throw invalid_argument("TextureCube::storage");
+ require_pixelformat(fmt);
ifmt = fmt;
size = sz;
return;
for(unsigned i=0; i<6; ++i)
- image(faces[i], level, get_base_pixelformat(ifmt), UNSIGNED_BYTE, 0);
+ image(enumerate_faces(i), level, get_base_pixelformat(ifmt), UNSIGNED_BYTE, 0);
}
void TextureCube::image(TextureCubeFace face, unsigned level, PixelFormat fmt, DataType type, const void *data)
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);
}
}
+void TextureCube::image(TextureCubeFace face, const Graphics::Image &img)
+{
+ unsigned w = img.get_width();
+ unsigned h = img.get_height();
+ PixelFormat fmt = pixelformat_from_graphics(img.get_format());
+ if(size==0)
+ {
+ if(w==h)
+ storage(fmt, w);
+ else
+ throw incompatible_data("TextureCube::image");
+ }
+ else if(w!=size || h!=size)
+ throw incompatible_data("TextureCube::image");
+
+ image(face, 0, fmt, UNSIGNED_BYTE, img.get_data());
+}
+
unsigned TextureCube::get_level_size(unsigned level)
{
return size>>level;
}
+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");
+ }
+}
+
+const Vector3 &TextureCube::get_face_direction(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");
+ }
+}
+
+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");
+ }
+}
+
+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");
+ }
+}
+
+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;
+}
+
+
+TextureCube::Loader::Loader(TextureCube &t):
+ DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>(t)
+{
+ add("image_data", &Loader::image_data);
+ add("raw_data", &Loader::raw_data);
+ add("storage", &Loader::storage);
+}
+
+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);
+}
+
+void TextureCube::Loader::raw_data(TextureCubeFace face, const string &data)
+{
+ obj.image(face, 0, obj.ifmt, UNSIGNED_BYTE, data.data());
+}
+
+void TextureCube::Loader::storage(PixelFormat fmt, unsigned s)
+{
+ 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
projects / libs / gl.git / blobdiff