void Buttons::draw() {
if(!is_visible) {
return;
}
// update projection matrix when viewport size changes.
GLint vp[4];
glGetIntegerv(GL_VIEWPORT, vp);
if(vp[2] != win_w || vp[3] != win_h) {
win_w = vp[2];
win_h = vp[3];
createOrtho(win_w, win_h);
}
// we draw in 2D so no depth test and cull fase.
bool cull_enabled = false;
if(glIsEnabled(GL_CULL_FACE)) {
glDisable(GL_CULL_FACE);
cull_enabled = true;
}
bool depth_enabled = false;
if(glIsEnabled(GL_DEPTH_TEST)) {
glDisable(GL_DEPTH_TEST);
depth_enabled = true;
}
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
gui_shader.enable();
glBindVertexArray(vao);
//vao.bind();
gui_shader.uniformMat4fv("projection_matrix", &ortho[0]);
for(int i = 0; i < vd.draw_arrays.size(); ++i) {
ButtonDrawArray& bda = vd.draw_arrays[i];
glDrawArrays(bda.mode, bda.start, bda.count);
}
// glBindVertexArray(0); // @todo we might remove this
static_text->draw();
dynamic_text->draw();
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindTexture(GL_TEXTURE_2D, 0);
// glBindVertexArray(0);
glUseProgram(0);
// Allow custom drawing.
if(cull_enabled) {
glEnable(GL_CULL_FACE);
}
if(depth_enabled) {
glEnable(GL_DEPTH_TEST);
}
}
void Font::draw() {
// Create projection matrix
GLint vp[4];
glGetIntegerv(GL_VIEWPORT, vp);
if(vp[2] != win_w || vp[3] != win_h) {
win_w = vp[2];
win_h = vp[3];
createOrtho(win_w, win_h);
}
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glBindVertexArray(vao);
//vao.bind();
shader.enable();
shader.uniformMat4fv("u_projection_matrix", pm);
// set texture
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_2D, tex);
shader.uniform1i("u_font_texture", 3);
// draw
//glPointSize(5.0f);
size_t dx = 0;
for(std::vector<FontEntry>::iterator it = entries.begin(); it != entries.end(); ++it) {
FontEntry& e = *it;
mm[12] = e.pos[0];
mm[13] = e.pos[1];
mm[14] = -0.5f;
shader.uniformMat4fv("u_model_matrix", mm);
glDrawArrays(GL_TRIANGLES, dx, vertices.size()); // e.num_vertices);
dx += e.num_vertices;
}
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_2D, 0);
// vao.unbind();
}
Buttons::Buttons(const string& title, int w)
:is_mouse_down(false)
,first_run(true)
,x(0)
,y(0)
,w(w)
,h(0)
,win_w(0)
,win_h(0)
,header_h(20) // header height (draggable area)
,border(1)
,state(BSTATE_NONE)
,is_changed(false)
,is_mouse_inside_header(false)
,is_mouse_inside_panel(false)
,triggered_drag(false)
,mdx(0)
,mdy(0)
,pmx(0)
,pmy(0)
,title(title)
,title_dx(0)
,num_panel_vertices(0)
,is_locked(false)
,static_text(NULL)
,dynamic_text(NULL)
,allocated_bytes(0)
,is_open(true)
,is_visible(true)
,name(title)
,col_hue(0.0f)
,col_sat(0.0f)
,col_bright(0.0f)
,col_alpha(0.0f)
,vao(0)
{
if(!shaders_initialized) {
bmf = new BitmapFont();
gui_shader.create(BUTTONS_VS, BUTTONS_FS);
glBindAttribLocation(gui_shader.prog_id, 0, "pos");
glBindAttribLocation(gui_shader.prog_id, 1, "col");
gui_shader.link();
gui_shader.enable();
gui_shader.addUniform("projection_matrix");
gui_shader.addAttribute("pos");
gui_shader.addAttribute("col");
shaders_initialized = true;
}
static_text = new Text(*bmf);
dynamic_text = new Text(*bmf);
glBindVertexArray(vao);
glGenBuffers(1, &vbo);
eglGetError();
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
eglGetError();
glEnableVertexAttribArray(0);
eglGetError();
glEnableVertexAttribArray(1);
eglGetError();
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(ButtonVertex), (GLvoid*)0);
glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof(ButtonVertex), (GLvoid*)8);
glBindVertexArray(0);
createOrtho(768, 1024);
// top draggable handle
BSET_COLOR(header_color_top, 0.07,0.07,0.07,1.0);
BSET_COLOR(header_color_bottom, 0.1,0.1,0.1,0.8);
BSET_COLOR(shadow_color, 0.1, 0.1, 0.1, 0.1);
title_dx = static_text->add(x+5, y+2, title);
name = createCleanName(title);
++num_created;
id = num_created;
}
void Buttons::onResize(int nw, int nh) {
createOrtho(nw,nh);
}
