X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fbackends%2Fopengl%2Ftexture3d_backend.cpp;h=81783850383c0db70670768e0e318b7cd8e88b13;hb=HEAD;hp=1197405ee367ff192690437f37ccca89b677000f;hpb=57ca8f2bd18525d80ed6ad5d3f72e57901162d55;p=libs%2Fgl.git

diff --git a/source/backends/opengl/texture3d_backend.cpp b/source/backends/opengl/texture3d_backend.cpp
index 1197405e..81783850 100644
--- a/source/backends/opengl/texture3d_backend.cpp
+++ b/source/backends/opengl/texture3d_backend.cpp
@@ -21,23 +21,20 @@ OpenGLTexture3D::OpenGLTexture3D(unsigned t):
 
 void OpenGLTexture3D::allocate()
 {
-	unsigned width = static_cast<const Texture3D *>(this)->width;
-	unsigned height = static_cast<const Texture3D *>(this)->height;
-	unsigned depth = static_cast<const Texture3D *>(this)->depth;
-	unsigned levels = static_cast<const Texture3D *>(this)->levels;
+	const Texture3D &self = *static_cast<const Texture3D *>(this);
 
 	if(!id)
-		generate_id();
+		create();
 
 	GLenum gl_fmt = get_gl_pixelformat(storage_fmt);
 	if(ARB_texture_storage)
 	{
 		if(ARB_direct_state_access)
-			glTextureStorage3D(id, levels, gl_fmt, width, height, depth);
+			glTextureStorage3D(id, n_levels, gl_fmt, self.width, self.height, self.depth);
 		else
 		{
 			bind_scratch();
-			glTexStorage3D(target, levels, gl_fmt, width, height, depth);
+			glTexStorage3D(target, n_levels, gl_fmt, self.width, self.height, self.depth);
 		}
 	}
 	else
@@ -45,12 +42,12 @@ void OpenGLTexture3D::allocate()
 		bind_scratch();
 		GLenum comp = get_gl_components(get_components(storage_fmt));
 		GLenum type = get_gl_type(get_component_type(storage_fmt));
-		for(unsigned i=0; i<levels; ++i)
+		for(unsigned i=0; i<n_levels; ++i)
 		{
-			auto lv_size = static_cast<const Texture3D *>(this)->get_level_size(i);
+			auto lv_size = self.get_level_size(i);
 			glTexImage3D(target, i, gl_fmt, lv_size.x, lv_size.y, lv_size.z, 0, comp, type, 0);
 		}
-		glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
+		glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, n_levels-1);
 	}
 
 	apply_swizzle();
@@ -74,5 +71,19 @@ bool OpenGLTexture3D::is_array() const
 	return target==GL_TEXTURE_2D_ARRAY;
 }
 
+size_t OpenGLTexture3D::get_data_size() const
+{
+	if(!id)
+		return 0;
+
+	const Texture3D &self = *static_cast<const Texture3D *>(this);
+
+	size_t level_size = self.width*self.height*self.depth*get_pixel_size(format);
+	size_t total_size = level_size;
+	for(unsigned i=0; i<n_levels; ++i, level_size>>=2)
+		total_size += level_size;
+	return total_size;
+}
+
 } // namespace GL
 } // namespace Msp