--- /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(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<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