1 #include <msp/gl/extensions/arb_direct_state_access.h>
2 #include <msp/gl/extensions/arb_sampler_objects.h>
3 #include <msp/gl/extensions/arb_shadow.h>
4 #include <msp/gl/extensions/ext_texture_filter_anisotropic.h>
5 #include <msp/gl/extensions/ext_texture3d.h>
6 #include <msp/gl/extensions/khr_debug.h>
9 #include "sampler_backend.h"
16 OpenGLSampler::OpenGLSampler()
18 static Require _req(ARB_sampler_objects);
19 static Require _req2(EXT_texture3D);
20 static Require _req3(ARB_shadow);
22 if(ARB_direct_state_access)
23 glCreateSamplers(1, &id);
25 glGenSamplers(1, &id);
28 bool OpenGLSampler::check_anisotropic(bool require)
31 static Require _req(EXT_texture_filter_anisotropic);
32 return EXT_texture_filter_anisotropic;
35 void OpenGLSampler::update(unsigned mask) const
37 const Sampler *self = static_cast<const Sampler *>(this);
38 if(mask&Sampler::MIN_FILTER)
39 glSamplerParameteri(id, GL_TEXTURE_MIN_FILTER, get_gl_filter(self->min_filter));
40 if(mask&Sampler::MAG_FILTER)
41 glSamplerParameteri(id, GL_TEXTURE_MAG_FILTER, get_gl_filter(self->mag_filter));
42 if(mask&Sampler::MAX_ANISOTROPY)
43 glSamplerParameterf(id, GL_TEXTURE_MAX_ANISOTROPY_EXT, self->max_anisotropy);
44 if(mask&Sampler::WRAP_S)
45 glSamplerParameteri(id, GL_TEXTURE_WRAP_S, get_gl_wrap(self->wrap_s));
46 if(mask&Sampler::WRAP_T)
47 glSamplerParameteri(id, GL_TEXTURE_WRAP_T, get_gl_wrap(self->wrap_t));
48 if(mask&Sampler::WRAP_R)
49 glSamplerParameteri(id, GL_TEXTURE_WRAP_R, get_gl_wrap(self->wrap_r));
50 if(mask&Sampler::BORDER_COLOR)
51 glSamplerParameterfv(id, GL_TEXTURE_BORDER_COLOR, &self->border_color.r);
52 if(mask&Sampler::COMPARE)
54 glSamplerParameteri(id, GL_TEXTURE_COMPARE_MODE, (self->compare ? GL_COMPARE_R_TO_TEXTURE : GL_NONE));
56 glSamplerParameteri(id, GL_TEXTURE_COMPARE_FUNC, get_gl_predicate(self->cmp_func));
60 void OpenGLSampler::set_debug_name(const string &name)
64 glObjectLabel(GL_SAMPLER, id, name.size(), name.c_str());
71 unsigned get_gl_filter(unsigned filter)
75 case NEAREST: return GL_NEAREST;
76 case LINEAR: return GL_LINEAR;
77 case NEAREST_MIPMAP_NEAREST: return GL_NEAREST_MIPMAP_NEAREST;
78 case NEAREST_MIPMAP_LINEAR: return GL_NEAREST_MIPMAP_LINEAR;
79 case LINEAR_MIPMAP_NEAREST: return GL_LINEAR_MIPMAP_NEAREST;
80 case LINEAR_MIPMAP_LINEAR: return GL_LINEAR_MIPMAP_LINEAR;
81 default: throw invalid_argument("get_gl_filter");
85 unsigned get_gl_wrap(unsigned wrap)
89 case REPEAT: return GL_REPEAT;
90 case CLAMP_TO_EDGE: return GL_CLAMP_TO_EDGE;
91 case CLAMP_TO_BORDER: return GL_CLAMP_TO_BORDER;
92 case MIRRORED_REPEAT: return GL_MIRRORED_REPEAT;
93 default: throw invalid_argument("get_gl_wrap");