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static linking, largeaddressaware, basic tga texture downsampling

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This commit is contained in:
tmj-fstate
2017-03-19 02:27:02 +01:00
parent 775e959bc9
commit a5d01ef059
6 changed files with 146 additions and 41 deletions
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33
Texture.cpp
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@@ -480,6 +480,14 @@ opengl_texture::load_TGA() {
return;
}
downsize( GL_BGRA );
if( ( data_width > Global::iMaxTextureSize ) || ( data_height > Global::iMaxTextureSize ) ) {
// for non-square textures there's currently possibility the scaling routine will have to abort
// before it gets all work done
data_state = resource_state::failed;
return;
}
// TODO: add horizontal/vertical data flip, based on the descriptor (18th) header byte
// fill remaining data info
@@ -656,6 +664,31 @@ opengl_texture::set_filtering() {
}
}
void
opengl_texture::downsize( GLuint const Format ) {
while( ( data_width > Global::iMaxTextureSize ) || ( data_height > Global::iMaxTextureSize ) ) {
// scale down the base texture, if it's larger than allowed maximum
// NOTE: scaling is uniform along both axes, meaning non-square textures can drop below the maximum
// TODO: replace with proper scaling function once we have image middleware in place
if( ( data_width < 2 ) || ( data_height < 2 ) ) {
// can't go any smaller
break;
}
switch( Format ) {
case GL_RGB: { downsample< glm::tvec3<std::uint8_t> >( data_width, data_height, data.data() ); break; }
case GL_BGRA:
case GL_RGBA: { downsample< glm::tvec4<std::uint8_t> >( data_width, data_height, data.data() ); break; }
default: { break; }
}
data_width /= 2;
data_height /= 2;
data.resize( data.size() / 4 ); // not strictly needed, but, eh
};
}
void
texture_manager::Init() {
}