c++ - Text not rendering at all with FreeType/GLFW -

i'm getting clear color; text not rendering, , shaders not giving out errors; debug output

initializing freetype version 2.4.10... opening font file freesans.ttf... loading glyph set , shaders... compiling shader textshader.vs...  compiling shader textshader.fs...  linking program...  drawing text... 16.666667 ms/frame 

here draw function

void text::draw(const char* text, float x, float y, float sx, float sy) {      const char *p;     ft_glyphslot g = face->glyph;      gluint tex;      glactivetexture(gl_texture0);     glgentextures(1, &tex);     glbindtexture(gl_texture_2d, tex);     gluniform1i(uniform_tex, 0);      glpixelstorei(gl_unpack_alignment, 1);      gltexparameteri(gl_texture_2d, gl_texture_wrap_s, gl_clamp_to_edge);     gltexparameteri(gl_texture_2d, gl_texture_wrap_t, gl_clamp_to_edge);      gltexparameteri(gl_texture_2d, gl_texture_min_filter, gl_linear);     gltexparameteri(gl_texture_2d, gl_texture_mag_filter, gl_linear);      glenablevertexattribarray(attribute_coord);     glbindbuffer(gl_array_buffer, vbo);     glvertexattribpointer(attribute_coord, 4, gl_float, gl_false, 0, 0);      for(p = text; *p; p++) {         if(ft_load_char(face, *p, ft_load_render))             continue;          glteximage2d(             gl_texture_2d,             0,             gl_alpha,             g->bitmap.width,             g->bitmap.rows,             0,             gl_alpha,             gl_unsigned_byte,             g->bitmap.buffer         );          float x2 = x + g->bitmap_left * sx;         float y2 = -y - g->bitmap_top * sy;         float w = g->bitmap.width * sx;         float h = g->bitmap.rows * sy;          glfloat box[4][4] = {             {x2,    -y2     , 0, 0},             {x2 + w,-y2     , 1, 0},             {x2,    -y2 - h , 0, 1},             {x2 + w,-y2 - h , 1, 1}         };          glbufferdata(gl_array_buffer, sizeof box, box, gl_dynamic_draw);         gldrawarrays(gl_triangle_strip, 0, 4);         x += (g->advance.x >> 6) * sx;        y += (g->advance.y >> 6) * sy;     }      gldisablevertexattribarray(attribute_coord);     gldeletetextures(1, &tex); } 

here execute draw function

void window::handleeventsandrender() {      if(!isopen) {         printf("must open window first render , handle events!");         return;     }      float sx = 2/1024;     float sy = 2/786;      text test("freesans.ttf");      gluseprogram(test.textprogram);      glfloat black[4] = {0, 0, 0, 1};     gluniform4fv(test.uniform_color, 1, black);      printf("drawing text...\n");      while(glfwgetwindowparam(glfw_opened)) {          glclearcolor(1, 1, 1, 1);         glclear(gl_color_buffer_bit);          gldisable(gl_cull_face);         glenable(gl_blend);         glblendfunc(gl_src_alpha, gl_one_minus_src_alpha);          test.draw("the quick brown fox jumps on lazy dog", -1 + 8 * sx, 1 - 50 * sy, sx, sy);          glfwswapbuffers();         printfps();     }      glfwterminate(); } 

finally, here shaders

vertex

#version 120  attribute vec4 coord; varying vec2 texpos;  void main(void) {     gl_position = vec4(coord.xy, 0, 1);     texpos = coord.zw; } 

fragment

#version 120  varying vec2 texpos; uniform sampler2d tex; uniform vec4 color;  void main(void) {     gl_fragcolor = vec4(1, 1, 1, texture2d(tex, texpos).a) * color; } 

can please me?

i think problem comes initialization of sx , sy

float sx = 2/1024; // sx == 0, 2 int , 1024 int. 2 / 1024 -> sx == 0 // ... test.draw("the quick brown fox jumps on lazy dog", -1 + 8 * sx, 1 - 50 * sy, sx, sy);  // calling test.draw("the quick brown fox jumps on lazy dog", -1, 1, 0, 0); // in text::draw float w = g->bitmap.width * sx; -> w == 0 

fix sx , sy initialization:

float sx = float(2)/float(1024); // or float sx = 2.0f / 1024.0f;