graphene
diff src/opengl.cc @ 1:f85a59195206
foo
author | John Tsiombikas <nuclear@member.fsf.org> |
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date | Fri, 24 Jul 2015 01:28:00 +0300 |
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1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/opengl.cc Fri Jul 24 01:28:00 2015 +0300 1.3 @@ -0,0 +1,79 @@ 1.4 +#include <stdio.h> 1.5 +#include <stdlib.h> 1.6 +#include <string.h> 1.7 +#include "opengl.h" 1.8 + 1.9 +namespace gph { 1.10 + 1.11 +GLCaps glcaps; 1.12 + 1.13 +static void fill_glcaps(); 1.14 +static void print_glcaps(GLCaps *caps); 1.15 + 1.16 +bool init_opengl() 1.17 +{ 1.18 + glewInit(); 1.19 + fill_glcaps(); 1.20 + return true; 1.21 +} 1.22 + 1.23 +static void fill_glcaps() 1.24 +{ 1.25 + memset(&glcaps, 0, sizeof glcaps); 1.26 + 1.27 + glcaps.version = strdup((const char*)glGetString(GL_VERSION)); 1.28 + glcaps.renderer = strdup((const char*)glGetString(GL_RENDERER)); 1.29 + glcaps.vendor = strdup((const char*)glGetString(GL_VENDOR)); 1.30 + 1.31 + glcaps.sdr = GLEW_ARB_shading_language_100; 1.32 + if(glcaps.sdr) { 1.33 + glcaps.sdr_ver = strdup((const char*)glGetString(GL_SHADING_LANGUAGE_VERSION)); 1.34 + } 1.35 + 1.36 + glcaps.fbo = GLEW_ARB_framebuffer_object || GLEW_EXT_framebuffer_object; 1.37 + glcaps.tex_float = GLEW_ARB_texture_float; 1.38 + glcaps.npow2_tex = GLEW_ARB_texture_non_power_of_two; 1.39 + glcaps.fsaa = GLEW_ARB_multisample; 1.40 + 1.41 + glGetIntegerv(GL_MAX_TEXTURE_UNITS, &glcaps.max_tex_units); 1.42 + if(glcaps.fbo) { 1.43 + glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS, &glcaps.max_mrt); 1.44 + } 1.45 + if(glcaps.fsaa) { 1.46 + glGetIntegerv(GL_MAX_SAMPLES, &glcaps.max_samples); 1.47 + } else { 1.48 + glcaps.max_samples = 1; 1.49 + } 1.50 + if(GLEW_EXT_texture_filter_anisotropic) { 1.51 + glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &glcaps.max_aniso); 1.52 + } else { 1.53 + glcaps.max_aniso = 1.0f; 1.54 + } 1.55 + 1.56 + print_glcaps(&glcaps); 1.57 +} 1.58 + 1.59 +static void print_glcaps(GLCaps *caps) 1.60 +{ 1.61 + printf("OpenGL %s - %s - %s\n", caps->version, caps->vendor, caps->renderer); 1.62 + 1.63 + printf("--- capabilities ---\n"); 1.64 + printf(" GLSL shaders: %s\n", caps->sdr ? "yes" : "no"); 1.65 + if(caps->sdr) { 1.66 + printf(" GLSL version: %s\n", caps->sdr_ver); 1.67 + } 1.68 + printf("framebuffer objects: %s\n", caps->fbo ? "yes" : "no"); 1.69 + if(caps->fbo) { 1.70 + printf(" max render targets: %d\n", caps->max_mrt); 1.71 + } 1.72 + printf(" antialiasing: %s\n", caps->fsaa ? "yes" : "no"); 1.73 + if(caps->fsaa) { 1.74 + printf(" max samples: %d\n", caps->max_samples); 1.75 + } 1.76 + printf(" float textures: %s\n", caps->tex_float ? "yes" : "no"); 1.77 + printf(" non-pow2 textures: %s\n", caps->npow2_tex ? "yes" : "no"); 1.78 + printf(" texture units: %d\n", caps->max_tex_units); 1.79 + printf("--------------------\n"); 1.80 +} 1.81 + 1.82 +} // namespace gph