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Glyph rendering working (test code; needs refactoring).

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This commit is contained in:
Josh Holtrop 2020-12-06 15:32:47 -05:00
parent 4923eb1ab8
commit 858ce9f7b1
1 changed files with 44 additions and 0 deletions
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44
src/jes/gui/package.d
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@ -3,10 +3,18 @@ module jes.gui;
static import jtk;
import derelict.opengl;
import std.stdio;
import jes.gui.font;
class Gui
{
jtk.Window[] m_windows;
gltk.Program m_text_program;
GLint m_viewport_size;
GLint m_texture;
GLint m_color;
GLint m_position;
int width;
int height;
this()
{
@ -30,6 +38,31 @@ class Gui
}
}
private void load()
{
static bool loaded = false;
if (!loaded)
{
auto v_shader = new gltk.Shader(GL_VERTEX_SHADER);
v_shader.set_source_from_file("share/jes/shaders/text.v.glsl");
auto f_shader = new gltk.Shader(GL_FRAGMENT_SHADER);
f_shader.set_source_from_file("share/jes/shaders/text.f.glsl");
m_text_program = new gltk.Program();
m_text_program.attach_shader(v_shader);
m_text_program.attach_shader(f_shader);
glBindAttribLocation(m_text_program.id, 0, "coords");
m_text_program.link();
m_viewport_size = m_text_program.get_uniform_location("viewport_size");
m_texture = m_text_program.get_uniform_location("texture");
m_color = m_text_program.get_uniform_location("color");
m_position = m_text_program.get_uniform_location("position");
glActiveTexture(GL_TEXTURE0);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
loaded = true;
}
}
private void event_loop()
{
bool running = true;
@ -43,6 +76,9 @@ class Gui
break;
case jtk.Event.WINDOW_RESIZE:
load();
width = event.window_resize.width;
height = event.window_resize.height;
glViewport(0, 0, event.window_resize.width, event.window_resize.height);
redraw_window(event.window_resize.window);
break;
@ -57,6 +93,14 @@ class Gui
{
glClearColor(0.5, 0.0, 1.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
auto font = new Font("share/jes/fonts/freefont-ttf-20120503/FreeMono.ttf", 20);
auto glyph = font.get_glyph('h');
m_text_program.use();
glUniform2i(m_viewport_size, width, height);
glUniform1i(m_texture, 0);
glUniform4f(m_color, 1.0, 1.0, 1.0, 1.0);
glUniform2i(m_position, 10, 10);
glyph.render();
m_windows[0].swap_buffers();
}