source/backends/opengl/device_backend.cpp

   1 #include <msp/gl/extensions/arb_enhanced_layouts.h>
   2 #include <msp/gl/extensions/arb_explicit_attrib_location.h>
   3 #include <msp/gl/extensions/arb_explicit_uniform_location.h>
   4 #include <msp/gl/extensions/arb_gpu_shader5.h>
   5 #include <msp/gl/extensions/arb_separate_shader_objects.h>
   6 #include <msp/gl/extensions/arb_uniform_buffer_object.h>
   7 #include <msp/gl/extensions/arb_vertex_shader.h>
   8 #include <msp/gl/extensions/ext_framebuffer_multisample.h>
   9 #include <msp/gl/extensions/ext_framebuffer_object.h>
  10 #include <msp/gl/extensions/ext_gpu_shader4.h>
  11 #include <msp/gl/extensions/ext_texture_array.h>
  12 #include <msp/gl/extensions/ext_texture_filter_anisotropic.h>
  13 #include <msp/gl/extensions/msp_clipping.h>
  14 #include <msp/gl/extensions/nv_fbo_color_attachments.h>
  15 #include "device.h"
  16 #include "device_backend.h"
  17 #include "gl.h"
  18
  19 using namespace std;
  20
  21 namespace Msp {
  22 namespace GL {
  23
  24 OpenGLDevice::OpenGLDevice(Graphics::Window &wnd, const Graphics::GLOptions &opts):
  25         context(wnd, opts)
  26 { }
  27
  28 void OpenGLDevice::fill_info()
  29 {
  30         DeviceInfo &info = static_cast<Device *>(this)->info;
  31
  32         if(const char *gl_ver_ptr = reinterpret_cast<const char *>(glGetString(GL_VERSION)))
  33         {
  34                 string gl_ver = gl_ver_ptr;
  35                 if(!gl_ver.compare(0, 10, "OpenGL ES "))
  36                         gl_ver.erase(0, 10);
  37
  38                 Version ver(gl_ver.substr(0, gl_ver.find(' ')));
  39
  40                 if(const char *force_ver_ptr = getenv("MSPGL_FORCE_VERSION"))
  41                 {
  42                         Version force_ver(force_ver_ptr);
  43                         if(force_ver<ver)
  44                                 ver = force_ver;
  45                 }
  46
  47                 info.api_version = ver;
  48         }
  49
  50         DeviceLimits &lim = info.limits;
  51         glGetIntegerv(GL_MAX_CLIP_PLANES, reinterpret_cast<int *>(&lim.max_clip_planes));
  52         if(ARB_vertex_shader)
  53         {
  54                 glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, reinterpret_cast<int *>(&lim.max_vertex_attributes));
  55                 glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, reinterpret_cast<int *>(&lim.max_texture_bindings));
  56         }
  57         if(EXT_framebuffer_object)
  58                 glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS, reinterpret_cast<int *>(&lim.max_color_attachments));
  59         if(EXT_framebuffer_multisample)
  60                 glGetIntegerv(GL_MAX_SAMPLES, reinterpret_cast<int *>(&lim.max_samples));
  61         if(ARB_uniform_buffer_object)
  62         {
  63                 glGetIntegerv(GL_MAX_UNIFORM_BUFFER_BINDINGS, reinterpret_cast<int *>(&lim.max_uniform_bindings));
  64                 glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, reinterpret_cast<int *>(&lim.uniform_buffer_alignment));
  65         }
  66         if(EXT_texture_filter_anisotropic)
  67                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY, &lim.max_anisotropy);
  68
  69         SL::Features &feat = info.glsl_features;
  70         feat.target_api = get_backend_api();
  71         feat.glsl_version = get_glsl_version();
  72         feat.arb_enhanced_layouts = ARB_enhanced_layouts;
  73         feat.arb_explicit_attrib_location = ARB_explicit_attrib_location;
  74         feat.arb_explicit_uniform_location = ARB_explicit_uniform_location;
  75         feat.arb_gpu_shader5 = ARB_gpu_shader5;
  76         feat.arb_separate_shader_objects = ARB_separate_shader_objects;
  77         feat.arb_uniform_buffer_object = ARB_uniform_buffer_object;
  78         feat.ext_gpu_shader4 = EXT_gpu_shader4;
  79         feat.ext_texture_array = EXT_texture_array;
  80         feat.uniform_binding_range = lim.max_uniform_bindings;
  81         feat.texture_binding_range = lim.max_texture_bindings;
  82 }
  83
  84 } // namespace GL
  85 } // namespace Msp