+++ /dev/null
-#include <msp/gl/extensions/arb_direct_state_access.h>
-#include <msp/gl/extensions/arb_sampler_objects.h>
-#include <msp/gl/extensions/arb_shadow.h>
-#include <msp/gl/extensions/ext_texture_filter_anisotropic.h>
-#include <msp/gl/extensions/ext_texture3d.h>
-#include <msp/strings/format.h>
-#include "error.h"
-#include "sampler.h"
-#include "texture.h"
-#include "texunit.h"
-
-using namespace std;
-
-namespace Msp {
-namespace GL {
-
-Sampler::Sampler():
- owner(0)
-{
- init();
-
- Require _req(ARB_sampler_objects);
- if(ARB_direct_state_access)
- glCreateSamplers(1, &id);
- else
- glGenSamplers(1, &id);
-}
-
-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)
- {
- if(!owner->get_id())
- {
- dirty_params |= mask;
- return;
- }
-
- if(!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(id)
- glSamplerParameteri(id, param, value);
- else 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(id)
- glSamplerParameterf(id, param, value);
- else 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 && owner!=unit.get_texture())
- throw invalid_operation("Sampler::bind_to");
-
- const Sampler *cur = unit.get_sampler();
- if(unit.set_sampler(this))
- {
- if(!owner || (cur && cur->id))
- glBindSampler(i, id);
-
- if(dirty_params)
- {
- update_parameter(dirty_params);
- dirty_params = 0;
- }
- }
-}
-
-const Sampler *Sampler::current(unsigned i)
-{
- return TexUnit::get_unit(i).get_sampler();
-}
-
-void Sampler::unbind_from(unsigned i)
-{
- TexUnit &unit = TexUnit::get_unit(i);
- const Sampler *cur = unit.get_sampler();
- if(unit.set_sampler(0) && cur->id)
- glBindSampler(i, 0);
-}
-
-void Sampler::unload()
-{
- if(owner && !owner->get_id())
- {
- if(min_filter!=NEAREST_MIPMAP_LINEAR)
- dirty_params |= MIN_FILTER;
- if(mag_filter!=LINEAR)
- dirty_params |= MAG_FILTER;
- if(max_anisotropy!=1.0f)
- dirty_params |= MAX_ANISOTROPY;
- if(wrap_s!=REPEAT)
- dirty_params |= WRAP_S;
- if(wrap_t!=REPEAT)
- dirty_params |= WRAP_T;
- if(wrap_r!=REPEAT)
- dirty_params |= WRAP_R;
- if(compare || cmp_func!=LEQUAL)
- dirty_params |= COMPARE;
- }
-}
-
-
-Sampler::Loader::Loader(Sampler &s):
- DataFile::ObjectLoader<Sampler>(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
projects / libs / gl.git / blobdiff