X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fsampler.cpp;fp=source%2Fsampler.cpp;h=9476ffe9fdca6ac930b37beeb4bf85cf42af713a;hb=78840e775c62c1b6e3f550bf8be1f0b828df91aa;hp=0000000000000000000000000000000000000000;hpb=fb5ca4dbba257d3eb7fa15800d9663b774e41e7e;p=libs%2Fgl.git diff --git a/source/sampler.cpp b/source/sampler.cpp new file mode 100644 index 00000000..9476ffe9 --- /dev/null +++ b/source/sampler.cpp @@ -0,0 +1,273 @@ +#include +#include +#include +#include +#include +#include +#include "error.h" +#include "sampler.h" +#include "texture.h" +#include "texunit.h" + +using namespace std; + +namespace Msp { +namespace GL { + +Sampler::Sampler(const Texture &tex): + id(0), + owner(&tex) +{ + if(this!=&tex.get_default_sampler()) + throw invalid_argument("Sampler::Sampler"); + + init(); +} + +void Sampler::init() +{ + min_filter = NEAREST_MIPMAP_LINEAR; + mag_filter = LINEAR; + max_anisotropy = 1.0f; + wrap_s = REPEAT; + wrap_t = REPEAT; + wrap_r = REPEAT; + compare = false; + cmp_func = LEQUAL; + dirty_params = 0; +} + +void Sampler::update_parameter(int mask) const +{ + if(!owner->get_id() || (!ARB_direct_state_access && TexUnit::current().get_texture()!=owner)) + { + TexUnit *unit = TexUnit::find_unit(owner); + if(!unit) + { + dirty_params |= mask; + return; + } + + unit->bind(); + } + + if(mask&MIN_FILTER) + set_parameter_i(GL_TEXTURE_MIN_FILTER, min_filter); + if(mask&MAG_FILTER) + set_parameter_i(GL_TEXTURE_MAG_FILTER, mag_filter); + if(mask&MAX_ANISOTROPY) + set_parameter_f(GL_TEXTURE_MAX_ANISOTROPY_EXT, max_anisotropy); + if(mask&WRAP_S) + set_parameter_i(GL_TEXTURE_WRAP_S, wrap_s); + if(mask&WRAP_T) + set_parameter_i(GL_TEXTURE_WRAP_T, wrap_t); + if(mask&WRAP_R) + set_parameter_i(GL_TEXTURE_WRAP_R, wrap_r); + if(mask&COMPARE) + { + set_parameter_i(GL_TEXTURE_COMPARE_MODE, (compare ? GL_COMPARE_R_TO_TEXTURE : GL_NONE)); + if(compare) + set_parameter_i(GL_TEXTURE_COMPARE_FUNC, cmp_func); + } +} + +void Sampler::set_parameter_i(unsigned param, int value) const +{ + if(ARB_direct_state_access) + glTextureParameteri(owner->get_id(), param, value); + else + glTexParameteri(owner->get_target(), param, value); +} + +void Sampler::set_parameter_f(unsigned param, float value) const +{ + if(ARB_direct_state_access) + glTextureParameterf(owner->get_id(), param, value); + else + glTexParameterf(owner->get_target(), param, value); +} + +void Sampler::set_min_filter(TextureFilter f) +{ + min_filter = f; + update_parameter(MIN_FILTER); +} + +void Sampler::set_mag_filter(TextureFilter f) +{ + mag_filter = f; + update_parameter(MAG_FILTER); +} + +void Sampler::set_filter(TextureFilter f) +{ + set_min_filter(f); + set_mag_filter(f==NEAREST ? NEAREST : LINEAR); +} + +void Sampler::set_max_anisotropy(float a) +{ + if(a<1.0f) + throw invalid_argument("Sampler::set_max_anisotropy"); + else if(a>1.0f) + static Require _req(EXT_texture_filter_anisotropic); + max_anisotropy = a; + if(EXT_texture_filter_anisotropic) + update_parameter(MAX_ANISOTROPY); +} + +void Sampler::set_wrap(TextureWrap w) +{ + set_wrap_s(w); + set_wrap_t(w); + if(EXT_texture3D) + set_wrap_r(w); +} + +void Sampler::set_wrap_s(TextureWrap w) +{ + wrap_s = w; + update_parameter(WRAP_S); +} + +void Sampler::set_wrap_t(TextureWrap w) +{ + wrap_t = w; + update_parameter(WRAP_T); +} + +void Sampler::set_wrap_r(TextureWrap w) +{ + static Require _req(EXT_texture3D); + wrap_r = w; + update_parameter(WRAP_R); +} + +void Sampler::disable_compare() +{ + compare = false; + update_parameter(COMPARE); +} + +void Sampler::set_compare(Predicate f) +{ + static Require _req(ARB_shadow); + compare = true; + cmp_func = f; + update_parameter(COMPARE); +} + +void Sampler::bind_to(unsigned i) const +{ + TexUnit &unit = TexUnit::get_unit(i); + if(owner!=unit.get_texture()) + throw invalid_operation("Sampler::bind_to"); + + if(dirty_params) + { + update_parameter(dirty_params); + dirty_params = 0; + } +} + +void Sampler::unload() +{ + // TODO check which params actually need refreshing + if(!owner->get_id()) + dirty_params = -1; +} + + +Sampler::Loader::Loader(Sampler &s): + DataFile::ObjectLoader(s) +{ + add("filter", &Loader::filter); + add("mag_filter", &Loader::mag_filter); + add("max_anisotropy", &Loader::max_anisotropy); + add("min_filter", &Loader::min_filter); + add("wrap", &Loader::wrap); + add("wrap_r", &Loader::wrap_r); + add("wrap_s", &Loader::wrap_s); + add("wrap_t", &Loader::wrap_t); +} + +void Sampler::Loader::filter(TextureFilter f) +{ + obj.set_filter(f); +} + +void Sampler::Loader::mag_filter(TextureFilter f) +{ + obj.set_mag_filter(f); +} + +void Sampler::Loader::max_anisotropy(float a) +{ + obj.set_max_anisotropy(a); +} + +void Sampler::Loader::min_filter(TextureFilter f) +{ + obj.set_min_filter(f); +} + +void Sampler::Loader::wrap(TextureWrap w) +{ + obj.set_wrap(w); +} + +void Sampler::Loader::wrap_r(TextureWrap w) +{ + obj.set_wrap_r(w); +} + +void Sampler::Loader::wrap_s(TextureWrap w) +{ + obj.set_wrap_s(w); +} + +void Sampler::Loader::wrap_t(TextureWrap w) +{ + obj.set_wrap_t(w); +} + + +bool is_mipmapped(TextureFilter filter) +{ + return (filter==NEAREST_MIPMAP_NEAREST || filter==NEAREST_MIPMAP_LINEAR || + filter==LINEAR_MIPMAP_NEAREST || filter==LINEAR_MIPMAP_LINEAR); +} + +void operator>>(const LexicalConverter &c, TextureFilter &tf) +{ + if(c.get()=="NEAREST") + tf = NEAREST; + else if(c.get()=="LINEAR") + tf = LINEAR; + else if(c.get()=="NEAREST_MIPMAP_NEAREST") + tf = NEAREST_MIPMAP_NEAREST; + else if(c.get()=="NEAREST_MIPMAP_LINEAR") + tf = NEAREST_MIPMAP_LINEAR; + else if(c.get()=="LINEAR_MIPMAP_NEAREST") + tf = LINEAR_MIPMAP_NEAREST; + else if(c.get()=="LINEAR_MIPMAP_LINEAR") + tf = LINEAR_MIPMAP_LINEAR; + else + throw lexical_error(format("conversion of '%s' to TextureFilter", c.get())); +} + +void operator>>(const LexicalConverter &c, TextureWrap &tw) +{ + if(c.get()=="REPEAT") + tw = REPEAT; + else if(c.get()=="CLAMP_TO_EDGE") + tw = CLAMP_TO_EDGE; + else if(c.get()=="MIRRORED_REPEAT") + tw = MIRRORED_REPEAT; + else + throw lexical_error(format("conversion of '%s' to TextureWrap", c.get())); +} + + +} // namespace GL +} // namespace Msp