2 #include <msp/gl/extensions/arb_direct_state_access.h>
3 #include <msp/gl/extensions/arb_instanced_arrays.h>
4 #include <msp/gl/extensions/arb_vertex_array_object.h>
5 #include <msp/gl/extensions/arb_vertex_attrib_binding.h>
6 #include <msp/gl/extensions/arb_vertex_buffer_object.h>
7 #include <msp/gl/extensions/arb_vertex_shader.h>
8 #include <msp/gl/extensions/ext_gpu_shader4.h>
9 #include <msp/gl/extensions/khr_debug.h>
11 #include "vertexarray.h"
12 #include "vertexformat.h"
13 #include "vertexsetup.h"
14 #include "vertexsetup_backend.h"
21 OpenGLVertexSetup::OpenGLVertexSetup()
23 static Require req(ARB_vertex_array_object);
24 if(ARB_direct_state_access)
25 glCreateVertexArrays(1, &id);
27 glGenVertexArrays(1, &id);
30 OpenGLVertexSetup::OpenGLVertexSetup(OpenGLVertexSetup &&other):
36 OpenGLVertexSetup::~OpenGLVertexSetup()
39 glDeleteVertexArrays(1, &id);
42 void OpenGLVertexSetup::require_format(const VertexFormat &fmt, bool instanced)
44 if(any_of(fmt.begin(), fmt.end(), is_integer_attribute))
45 static Require _req(EXT_gpu_shader4);
47 static Require req(ARB_instanced_arrays);
50 void OpenGLVertexSetup::update(unsigned mask) const
52 static bool direct = ARB_direct_state_access && ARB_vertex_attrib_binding;
54 if(mask&VertexSetup::VERTEX_ARRAY)
55 update_vertex_array(*static_cast<const VertexSetup *>(this)->vertex_array, 0, 0, direct);
57 if(mask&VertexSetup::INSTANCE_ARRAY)
58 update_vertex_array(*static_cast<const VertexSetup *>(this)->inst_array, 1, 1, direct);
60 if(mask&VertexSetup::INDEX_BUFFER)
62 unsigned buf_id = static_cast<const VertexSetup *>(this)->index_buffer->id;
64 glVertexArrayElementBuffer(id, buf_id);
66 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buf_id);
70 void OpenGLVertexSetup::update_vertex_array(const VertexArray &array, unsigned binding, unsigned divisor, bool direct) const
74 OpenGLBuffer::unbind_scratch();
75 glBindBuffer(GL_ARRAY_BUFFER, array.get_buffer()->id);
78 const VertexFormat &fmt = array.get_format();
79 unsigned stride = fmt.stride();
82 glVertexArrayVertexBuffer(id, binding, array.get_buffer()->id, 0, stride);
83 glVertexArrayBindingDivisor(id, binding, divisor);
87 for(VertexAttribute a: fmt)
89 unsigned sem = get_attribute_semantic(a);
90 bool integer = is_integer_attribute(a);
91 GLenum type = get_gl_type(get_attribute_source_type(a));
92 unsigned cc = get_attribute_component_count(a);
96 glVertexArrayAttribIFormat(id, sem, cc, type, offset);
98 glVertexArrayAttribFormat(id, sem, cc, type, true, offset);
99 glVertexArrayAttribBinding(id, sem, binding);
100 glEnableVertexArrayAttrib(id, sem);
105 glVertexAttribIPointer(sem, cc, type, stride, reinterpret_cast<void *>(offset));
107 glVertexAttribPointer(sem, cc, type, true, stride, reinterpret_cast<void *>(offset));
108 if(ARB_instanced_arrays)
109 glVertexAttribDivisor(sem, divisor);
110 glEnableVertexAttribArray(sem);
112 offset += get_attribute_size(a);
116 glBindBuffer(GL_ARRAY_BUFFER, 0);
119 void OpenGLVertexSetup::unload()
121 if(ARB_direct_state_access)
123 glVertexArrayVertexBuffer(id, 0, 0, 0, 0);
124 glVertexArrayVertexBuffer(id, 1, 0, 0, 0);
125 glVertexArrayElementBuffer(id, 0);
129 glBindVertexArray(id);
130 glBindBuffer(GL_ARRAY_BUFFER, 0);
132 for(VertexAttribute a: static_cast<const VertexSetup *>(this)->vertex_format)
134 unsigned sem = get_attribute_semantic(a);
135 glDisableVertexAttribArray(sem);
136 glVertexAttribPointer(sem, 1, GL_FLOAT, false, 0, 0);
138 for(VertexAttribute a: static_cast<const VertexSetup *>(this)->inst_format)
140 unsigned sem = get_attribute_semantic(a);
141 glDisableVertexAttribArray(sem);
142 glVertexAttribPointer(sem, 1, GL_FLOAT, false, 0, 0);
145 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
149 void OpenGLVertexSetup::set_debug_name(const string &name)
153 glObjectLabel(GL_VERTEX_ARRAY, id, name.size(), name.c_str());