opengl program compiles but gives error when run (UBUNTU 14.04)

I compiled Opengl by installing the folowing packages through Synaptics Package manager. ``` freeglut3 freeglut3-dev freeglut3-dbg libglew1.5 libglew1.5-dev libglu1-mesa libglu1-mesa-dev libgl1-mesa-glx libgl1-mesa-dev ``` This is the output when I run the program. X Error of failed request: GLXBadFBConfig Major opcode of failed request: 156 (GLX) Minor opcode of failed request: 34 () Serial number of failed request: 42 Current serial number in output stream: 41 The input to this ``` (lspci | grep VGA) ; \ (dpkg -l | egrep 'xorg-video|glx') ; \ (ls -l /usr/lib/xorg/modules/{drivers,extensions}) ``` gives an output to this ``` 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] ii libgl1-mesa-glx:amd64 10.1.0-4ubuntu5 amd64 free implementation of the OpenGL API -- GLX runtime ii libxcb-glx0:amd64 1.10-2ubuntu1 amd64 X C Binding, glx extension ii libxcb-glx0-dev:amd64 1.10-2ubuntu1 amd64 X C Binding, glx extension, development files ii xserver-xorg-video-all 1:7.7+1ubuntu8 amd64 X.Org X server -- output driver metapackage ii xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1 amd64 X.Org X server -- AMD/ATI display driver wrapper ii xserver-xorg-video-cirrus 1:1.5.2-1build1 amd64 X.Org X server -- Cirrus display driver ii xserver-xorg-video-fbdev 1:0.4.4-1build1 amd64 X.Org X server -- fbdev display driver ii xserver-xorg-video-glamoregl 0.6.0-0ubuntu4 amd64 X.Org X server -- graphics acceleration module based on OpenGL ii xserver-xorg-video-intel 2:2.99.910-0ubuntu1 amd64 X.Org X server -- Intel i8xx, i9xx display driver ii xserver-xorg-video-mach64 6.9.4-1build1 amd64 X.Org X server -- ATI Mach64 display driver ii xserver-xorg-video-mga 1:1.6.3-1build1 amd64 X.Org X server -- MGA display driver ii xserver-xorg-video-modesetting 0.8.1-1build1 amd64 X.Org X server -- Generic modesetting driver ii xserver-xorg-video-neomagic 1:1.2.8-1build1 amd64 X.Org X server -- Neomagic display driver ii xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 amd64 X.Org X server -- Nouveau display driver ii xserver-xorg-video-openchrome 1:0.3.3-1build1 amd64 X.Org X server -- VIA display driver ii xserver-xorg-video-qxl 0.1.1-0ubuntu3 amd64 X.Org X server -- QXL display driver ii xserver-xorg-video-r128 6.9.2-1build1 amd64 X.Org X server -- ATI r128 display driver ii xserver-xorg-video-radeon 1:7.3.0-1ubuntu3.1 amd64 X.Org X server -- AMD/ATI Radeon display driver ii xserver-xorg-video-s3 1:0.6.5-0ubuntu4 amd64 X.Org X server -- legacy S3 display driver ii xserver-xorg-video-savage 1:2.3.7-2ubuntu2 amd64 X.Org X server -- Savage display driver ii xserver-xorg-video-siliconmotion 1:1.7.7-2build1 amd64 X.Org X server -- SiliconMotion display driver ii xserver-xorg-video-sis 1:0.10.7-0ubuntu6 amd64 X.Org X server -- SiS display driver ii xserver-xorg-video-sisusb 1:0.9.6-2build1 amd64 X.Org X server -- SiS USB display driver ii xserver-xorg-video-tdfx 1:1.4.5-1build1 amd64 X.Org X server -- tdfx display driver ii xserver-xorg-video-trident 1:1.3.6-0ubuntu5 amd64 X.Org X server -- Trident display driver ii xserver-xorg-video-vesa 1:2.3.3-1build1 amd64 X.Org X server -- VESA display driver ii xserver-xorg-video-vmware 1:13.0.2-2ubuntu1 amd64 X.Org X server -- VMware display driver /usr/lib/xorg/modules/drivers: total 4728 -rw-r--r-- 1 root root 10408 مٓی 2 01:55 ati_drv.so -rw-r--r-- 1 root root 31704 فروري 5 15:32 cirrus_alpine.so -rw-r--r-- 1 root root 19352 فروري 5 15:32 cirrus_drv.so -rw-r--r-- 1 root root 27832 فروري 5 15:32 cirrus_laguna.so -rw-r--r-- 1 root root 23560 فروري 5 15:31 fbdev_drv.so -rw-r--r-- 1 root root 1460976 فروري 10 17:15 intel_drv.so -rw-r--r-- 1 root root 174648 فروري 5 15:33 mach64_drv.so -rw-r--r-- 1 root root 140656 فروري 5 15:36 mga_drv.so -rw-r--r-- 1 root root 44488 فروري 5 15:37 modesetting_drv.so -rw-r--r-- 1 root root 66544 فروري 5 15:36 neomagic_drv.so -rw-r--r-- 1 root root 207440 فروري 5 15:38 nouveau_drv.so -rw-r--r-- 1 root root 356336 فروري 5 15:41 openchrome_drv.so -rw-r--r-- 1 root root 172456 فروري 5 15:43 qxl_drv.so -rw-r--r-- 1 root root 108712 فروري 5 15:39 r128_drv.so -rw-r--r-- 1 root root 432616 مٓی 2 01:55 radeon_drv.so -rw-r--r-- 1 root root 57656 فروري 5 15:41 s3_drv.so -rw-r--r-- 1 root root 140848 فروري 5 15:43 savage_drv.so -rw-r--r-- 1 root root 112192 فروري 5 15:46 siliconmotion_drv.so -rw-r--r-- 1 root root 547064 اپريل 2 16:01 sis_drv.so -rw-r--r-- 1 root root 77144 فروري 5 15:45 sisusb_drv.so -rw-r--r-- 1 root root 189392 فروري 5 15:43 spiceqxl_drv.so -rw-r--r-- 1 root root 65936 فروري 5 15:45 tdfx_drv.so -rw-r--r-- 1 root root 142224 فروري 5 15:50 trident_drv.so -rw-r--r-- 1 root root 27624 فروري 5 15:52 vesa_drv.so -rw-r--r-- 1 root root 157720 اپريل 10 13:56 vmware_drv.so /usr/lib/xorg/modules/extensions: total 272 -rw-r--r-- 1 root root 277832 اپريل 16 18:38 libglx.so ``` for this input ``` glxinfo ``` this is the output ``` name of display: :0 display: :0 screen: 0 direct rendering: Yes server glx vendor string: SGI server glx version string: 1.4 server glx extensions: GLX_ARB_create_context, GLX_ARB_create_context_profile, GLX_ARB_fbconfig_float, GLX_ARB_framebuffer_sRGB, GLX_ARB_multisample, GLX_EXT_create_context_es2_profile, GLX_EXT_framebuffer_sRGB, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, GLX_OML_swap_method, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_SGI_swap_control client glx vendor string: Mesa Project and SGI client glx version string: 1.4 client glx extensions: GLX_ARB_create_context, GLX_ARB_create_context_profile, GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_create_context_es2_profile, GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync GLX version: 1.4 GLX extensions: GLX_ARB_create_context, GLX_ARB_create_context_profile, GLX_ARB_fbconfig_float, GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_create_context_es2_profile, GLX_EXT_framebuffer_sRGB, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, GLX_MESA_multithread_makecurrent, GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync OpenGL vendor string: X.Org OpenGL renderer string: Gallium 0.4 on AMD CAICOS OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.1.0 OpenGL core profile shading language version string: 3.30 OpenGL core profile context flags: (none) OpenGL core profile profile mask: core profile OpenGL core profile extensions: GL_AMD_conservative_depth, GL_AMD_draw_buffers_blend, GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_stencil_export, GL_AMD_shader_trinary_minmax, GL_AMD_vertex_shader_layer, GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5, GL_ARB_ES2_compatibility, GL_ARB_base_instance, GL_ARB_blend_func_extended, GL_ARB_clear_buffer_object, GL_ARB_conservative_depth, GL_ARB_copy_buffer, GL_ARB_debug_output, GL_ARB_depth_buffer_float, GL_ARB_depth_clamp, GL_ARB_draw_buffers, GL_ARB_draw_buffers_blend, GL_ARB_draw_elements_base_vertex, GL_ARB_draw_instanced, GL_ARB_explicit_attrib_location, GL_ARB_fragment_coord_conventions, GL_ARB_fragment_shader, GL_ARB_framebuffer_object, GL_ARB_framebuffer_sRGB, GL_ARB_get_program_binary, GL_ARB_half_float_pixel, GL_ARB_half_float_vertex, GL_ARB_instanced_arrays, GL_ARB_internalformat_query, GL_ARB_invalidate_subdata, GL_ARB_map_buffer_alignment, GL_ARB_map_buffer_range, GL_ARB_occlusion_query2, GL_ARB_pixel_buffer_object, GL_ARB_point_sprite, GL_ARB_provoking_vertex, GL_ARB_robustness, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map, GL_ARB_shader_bit_encoding, GL_ARB_shader_objects, GL_ARB_shader_stencil_export, GL_ARB_shader_texture_lod, GL_ARB_shading_language_420pack, GL_ARB_shading_language_packing, GL_ARB_sync, GL_ARB_texture_buffer_object, GL_ARB_texture_buffer_object_rgb32, GL_ARB_texture_buffer_range, GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map_array, GL_ARB_texture_float, GL_ARB_texture_mirror_clamp_to_edge, GL_ARB_texture_multisample, GL_ARB_texture_non_power_of_two, GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui, GL_ARB_texture_storage, GL_ARB_texture_storage_multisample, GL_ARB_texture_swizzle, GL_ARB_timer_query, GL_ARB_transform_feedback2, GL_ARB_transform_feedback3, GL_ARB_transform_feedback_instanced, GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra, GL_ARB_vertex_array_object, GL_ARB_vertex_attrib_binding, GL_ARB_vertex_shader, GL_ARB_vertex_type_10f_11f_11f_rev, GL_ARB_vertex_type_2_10_10_10_rev, GL_ATI_blend_equation_separate, GL_ATI_texture_compression_3dc, GL_ATI_texture_float, GL_ATI_texture_mirror_once, GL_EXT_abgr, GL_EXT_blend_equation_separate, GL_EXT_draw_buffers2, GL_EXT_draw_instanced, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample, GL_EXT_framebuffer_multisample_blit_scaled, GL_EXT_framebuffer_sRGB, GL_EXT_packed_depth_stencil, GL_EXT_packed_float, GL_EXT_pixel_buffer_object, GL_EXT_provoking_vertex, GL_EXT_texture_array, GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_latc, GL_EXT_texture_compression_rgtc, GL_EXT_texture_compression_s3tc, GL_EXT_texture_filter_anisotropic, GL_EXT_texture_integer, GL_EXT_texture_mirror_clamp, GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_decode, GL_EXT_texture_shared_exponent, GL_EXT_texture_snorm, GL_EXT_texture_swizzle, GL_EXT_timer_query, GL_EXT_transform_feedback, GL_EXT_vertex_array_bgra, GL_IBM_multimode_draw_arrays, GL_KHR_debug, GL_MESA_pack_invert, GL_MESA_texture_signed_rgba, GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_packed_depth_stencil, GL_NV_texture_barrier, GL_NV_vdpau_interop, GL_OES_EGL_image, GL_OES_read_format, GL_S3_s3tc OpenGL version string: 3.0 Mesa 10.1.0 OpenGL shading language version string: 1.30 OpenGL context flags: (none) OpenGL extensions: GL_AMD_conservative_depth, GL_AMD_draw_buffers_blend, GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_stencil_export, GL_AMD_shader_trinary_minmax, GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5, GL_APPLE_packed_pixels, GL_APPLE_vertex_array_object, GL_ARB_ES2_compatibility, GL_ARB_base_instance, GL_ARB_blend_func_extended, GL_ARB_clear_buffer_object, GL_ARB_color_buffer_float, GL_ARB_conservative_depth, GL_ARB_copy_buffer, GL_ARB_debug_output, GL_ARB_depth_buffer_float, GL_ARB_depth_clamp, GL_ARB_depth_texture, GL_ARB_draw_buffers, GL_ARB_draw_buffers_blend, GL_ARB_draw_elements_base_vertex, GL_ARB_draw_instanced, GL_ARB_explicit_attrib_location, GL_ARB_fragment_coord_conventions, GL_ARB_fragment_program, GL_ARB_fragment_program_shadow, GL_ARB_fragment_shader, GL_ARB_framebuffer_object, GL_ARB_framebuffer_sRGB, GL_ARB_get_program_binary, GL_ARB_half_float_pixel, GL_ARB_half_float_vertex, GL_ARB_instanced_arrays, GL_ARB_internalformat_query, GL_ARB_invalidate_subdata, GL_ARB_map_buffer_alignment, GL_ARB_map_buffer_range, GL_ARB_multisample, GL_ARB_multitexture, GL_ARB_occlusion_query, GL_ARB_occlusion_query2, GL_ARB_pixel_buffer_object, GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_provoking_vertex, GL_ARB_robustness, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map, GL_ARB_shader_bit_encoding, GL_ARB_shader_objects, GL_ARB_shader_stencil_export, GL_ARB_shader_texture_lod, GL_ARB_shading_language_100, GL_ARB_shading_language_420pack, GL_ARB_shading_language_packing, GL_ARB_shadow, GL_ARB_sync, GL_ARB_texture_border_clamp, GL_ARB_texture_compression, GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map, GL_ARB_texture_cube_map_array, GL_ARB_texture_env_add, GL_ARB_texture_env_combine, GL_ARB_texture_env_crossbar, GL_ARB_texture_env_dot3, GL_ARB_texture_float, GL_ARB_texture_mirror_clamp_to_edge, GL_ARB_texture_mirrored_repeat, GL_ARB_texture_multisample, GL_ARB_texture_non_power_of_two, GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui, GL_ARB_texture_storage, GL_ARB_texture_storage_multisample, GL_ARB_texture_swizzle, GL_ARB_timer_query, GL_ARB_transform_feedback2, GL_ARB_transform_feedback3, GL_ARB_transform_feedback_instanced, GL_ARB_transpose_matrix, GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra, GL_ARB_vertex_array_object, GL_ARB_vertex_attrib_binding, GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader, GL_ARB_vertex_type_10f_11f_11f_rev, GL_ARB_vertex_type_2_10_10_10_rev, GL_ARB_window_pos, GL_ATI_blend_equation_separate, GL_ATI_draw_buffers, GL_ATI_separate_stencil, GL_ATI_texture_compression_3dc, GL_ATI_texture_env_combine3, GL_ATI_texture_float, GL_ATI_texture_mirror_once, GL_EXT_abgr, GL_EXT_bgra, GL_EXT_blend_color, GL_EXT_blend_equation_separate, GL_EXT_blend_func_separate, GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_compiled_vertex_array, GL_EXT_copy_texture, GL_EXT_draw_buffers2, GL_EXT_draw_instanced, GL_EXT_draw_range_elements, GL_EXT_fog_coord, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample, GL_EXT_framebuffer_multisample_blit_scaled, GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB, GL_EXT_gpu_program_parameters, GL_EXT_multi_draw_arrays, GL_EXT_packed_depth_stencil, GL_EXT_packed_float, GL_EXT_packed_pixels, GL_EXT_pixel_buffer_object, GL_EXT_point_parameters, GL_EXT_polygon_offset, GL_EXT_provoking_vertex, GL_EXT_rescale_normal, GL_EXT_secondary_color, GL_EXT_separate_specular_color, GL_EXT_shadow_funcs, GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, GL_EXT_subtexture, GL_EXT_texture, GL_EXT_texture3D, GL_EXT_texture_array, GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_latc, GL_EXT_texture_compression_rgtc, GL_EXT_texture_compression_s3tc, GL_EXT_texture_cube_map, GL_EXT_texture_edge_clamp, GL_EXT_texture_env_add, GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3, GL_EXT_texture_filter_anisotropic, GL_EXT_texture_integer, GL_EXT_texture_lod_bias, GL_EXT_texture_mirror_clamp, GL_EXT_texture_object, GL_EXT_texture_rectangle, GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_decode, GL_EXT_texture_shared_exponent, GL_EXT_texture_snorm, GL_EXT_texture_swizzle, GL_EXT_timer_query, GL_EXT_transform_feedback, GL_EXT_vertex_array, GL_EXT_vertex_array_bgra, GL_IBM_multimode_draw_arrays, GL_IBM_rasterpos_clip, GL_IBM_texture_mirrored_repeat, GL_INGR_blend_func_separate, GL_KHR_debug, GL_MESA_pack_invert, GL_MESA_texture_signed_rgba, GL_MESA_window_pos, GL_NV_blend_square, GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_fog_distance, GL_NV_light_max_exponent, GL_NV_packed_depth_stencil, GL_NV_primitive_restart, GL_NV_texgen_reflection, GL_NV_texture_barrier, GL_NV_texture_env_combine4, GL_NV_texture_rectangle, GL_NV_vdpau_interop, GL_OES_EGL_image, GL_OES_read_format, GL_S3_s3tc, GL_SGIS_generate_mipmap, GL_SGIS_texture_border_clamp, GL_SGIS_texture_edge_clamp, GL_SGIS_texture_lod, GL_SUN_multi_draw_arrays ``` I cut the rest off since the body limit is 30000 characters and output is over 70000 Below is all the source code, and I compiled it by typing this in the terminal: ``` g++ triangles.cpp LoadShaders.cpp -o output -lGL -lglut -lGLU -lGLEW ``` triangles.cpp: ``` #include <iostream> using namespace std; #include "vgl.h" #include "LoadShaders.h" enum VAO_IDs {Triangles, NumVAOs}; enum Buffer_IDs {ArrayBuffer, NumBuffers}; enum Attrib_IDs {vPosition = 0}; GLuint VAOs[NumVAOs]; GLuint Buffers[NumBuffers]; const GLuint NumVertices = 6; //init void init(void) { glGenVertexArrays(NumVAOs, VAOs); glBindVertexArray(VAOs[Triangles]); GLfloat vertices[NumVertices][2] = { {-0.90, -0.90}, //Triangle 1 { 0.85, -0.90}, {-0.90, 0.85}, {-0.90, -0.85}, //Triangle 2 { 0.90, 0.90}, {-0.85, 0.90} }; glGenBuffers(NumBuffers, Buffers); glBindBuffer(GL_ARRAY_BUFFER, Buffers[ArrayBuffer]); glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); ShaderInfo shaders[] = { {GL_VERTEX_SHADER, "triangles.vert"}, {GL_FRAGMENT_SHADER, "triagles.frag"}, {GL_NONE, NULL} }; GLuint program = LoadShaders(shaders); glUseProgram(program); glVertexAttribPointer(vPosition, 2, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0)); glEnableVertexAttribArray(vPosition); } //display void display(void) { glClear(GL_COLOR_BUFFER_BIT); glBindVertexArray(VAOs[Triangles]); glDrawArrays(GL_TRIANGLES, 0, NumVertices); glFlush(); } //main int main(int argc, char **argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGBA); glutInitWindowSize(512, 512); glutInitContextVersion(4, 3); glutInitContextProfile(GLUT_CORE_PROFILE); glutCreateWindow(argv[0]); if(glewInit()) { cerr << "Unable to initialize GLEW...exiting" << endl; exit(EXIT_FAILURE); } init(); glutDisplayFunc(display); glutMainLoop(); } ``` vgl.h: ``` #ifndef __VGL_H__ #define __VGL_H__ // #define USE_GL3W #ifdef USE_GL3W #include <GL3/gl3.h> #include <GL3/gl3w.h> #else #define GLEW_STATIC #include <GL/glew.h> #ifdef _MSC_VER # ifdef _DEBUG # if (_MSC_VER >= 1600) # pragma comment (lib, "glew_static_vs2010_d.lib") # else # pragma comment (lib, "glew_static_d.lib") # endif # else # if (_MSC_VER >= 1600) # pragma comment (lib, "glew_static_vs2010.lib") # else # pragma comment (lib, "glew_static.lib") # endif # endif #endif #endif #define FREEGLUT_STATIC #include <GL/freeglut.h> #ifdef _MSC_VER # ifdef _DEBUG # if (_MSC_VER >= 1600) # pragma comment (lib, "freeglut_static_vs2010_d.lib") # else # pragma comment (lib, "freeglut_static_d.lib") # endif # else # if (_MSC_VER >= 1600) # pragma comment (lib, "freeglut_static_vs2010.lib") # else # pragma comment (lib, "freeglut_static.lib") # endif # endif #endif #define BUFFER_OFFSET(x) ((const void*) (x)) #endif /* __VGL_H__ */ ``` LoadShaders.h: ``` ////////////////////////////////////////////////////////////////////////////// // // --- LoadShaders.h --- // ////////////////////////////////////////////////////////////////////////////// #ifndef __LOAD_SHADERS_H__ #define __LOAD_SHADERS_H__ #include <GL/gl.h> #ifdef __cplusplus extern "C" { #endif // __cplusplus //---------------------------------------------------------------------------- // // LoadShaders() takes an array of ShaderFile structures, each of which // contains the type of the shader, and a pointer a C-style character // string (i.e., a NULL-terminated array of characters) containing the // entire shader source. // // The array of structures is terminated by a final Shader with the // "type" field set to GL_NONE. // // LoadShaders() returns the shader program value (as returned by // glCreateProgram()) on success, or zero on failure. // typedef struct { GLenum type; const char* filename; GLuint shader; } ShaderInfo; GLuint LoadShaders( ShaderInfo* ); //---------------------------------------------------------------------------- #ifdef __cplusplus }; #endif // __cplusplus #endif // __LOAD_SHADERS_H__ ``` LoadShaders.cpp ``` ////////////////////////////////////////////////////////////////////////////// // // --- LoadShaders.cxx --- // ////////////////////////////////////////////////////////////////////////////// #include <cstdlib> #include <cstdio> #include <iostream> #define GLEW_STATIC #include <GL/glew.h> #include "LoadShaders.h" #ifdef __cplusplus extern "C" { #endif // __cplusplus //---------------------------------------------------------------------------- static const GLchar* ReadShader( const char* filename ) { #ifdef WIN32 FILE* infile; fopen_s( &infile, filename, "rb" ); #else FILE* infile = fopen( filename, "rb" ); #endif // WIN32 if ( !infile ) { #ifdef _DEBUG std::cerr << "Unable to open file '" << filename << "'" << std::endl; #endif /* DEBUG */ return NULL; } fseek( infile, 0, SEEK_END ); int len = ftell( infile ); fseek( infile, 0, SEEK_SET ); GLchar* source = new GLchar[len+1]; fread( source, 1, len, infile ); fclose( infile ); source[len] = 0; return const_cast<const GLchar*>(source); } //---------------------------------------------------------------------------- GLuint LoadShaders( ShaderInfo* shaders ) { if ( shaders == NULL ) { return 0; } GLuint program = glCreateProgram(); ShaderInfo* entry = shaders; while ( entry->type != GL_NONE ) { GLuint shader = glCreateShader( entry->type ); entry->shader = shader; const GLchar* source = ReadShader( entry->filename ); if ( source == NULL ) { for ( entry = shaders; entry->type != GL_NONE; ++entry ) { glDeleteShader( entry->shader ); entry->shader = 0; } return 0; } glShaderSource( shader, 1, &source, NULL ); delete [] source; glCompileShader( shader ); GLint compiled; glGetShaderiv( shader, GL_COMPILE_STATUS, &compiled ); if ( !compiled ) { #ifdef _DEBUG GLsizei len; glGetShaderiv( shader, GL_INFO_LOG_LENGTH, &len ); GLchar* log = new GLchar[len+1]; glGetShaderInfoLog( shader, len, &len, log ); std::cerr << "Shader compilation failed: " << log << std::endl; delete [] log; #endif /* DEBUG */ return 0; } glAttachShader( program, shader ); ++entry; } #ifdef GL_VERSION_4_1 if ( GLEW_VERSION_4_1 ) { // glProgramParameteri( program, GL_PROGRAM_SEPARABLE, GL_TRUE ); } #endif /* GL_VERSION_4_1 */ glLinkProgram( program ); GLint linked; glGetProgramiv( program, GL_LINK_STATUS, &linked ); if ( !linked ) { #ifdef _DEBUG GLsizei len; glGetProgramiv( program, GL_INFO_LOG_LENGTH, &len ); GLchar* log = new GLchar[len+1]; glGetProgramInfoLog( program, len, &len, log ); std::cerr << "Shader linking failed: " << log << std::endl; delete [] log; #endif /* DEBUG */ for ( entry = shaders; entry->type != GL_NONE; ++entry ) { glDeleteShader( entry->shader ); entry->shader = 0; } return 0; } return program; } //---------------------------------------------------------------------------- #ifdef __cplusplus } #endif // __cplusplus ```