1 files changed, 65 insertions, 0 deletions
diff --git a/src/graphics/text.c b/src/graphics/text.c
new file mode 100644
index 0000000..204d1e0
--- /dev/null
+++ b/src/graphics/text.c
@@ -0,0 +1,65 @@
+#include "../../include/mgl/graphics/text.h"
+#include "../../include/mgl/graphics/font.h"
+#include "../../include/mgl/mgl.h"
+
+int mgl_text_init(mgl_text *self, mgl_font *font, const char *text, float x, float y) {
+    self->font = font;
+    self->text = text;
+    self->color = (mgl_color){ 1.0f, 1.0f, 1.0f, 1.0f };
+    self->position = (mgl_vec2f){ x, y };
+    return 0;
+}
+
+void mgl_text_deinit(mgl_text *self) {
+
+}
+
+static void mgl_text_draw_glyph(mgl_context *context, mgl_font_glyph *glyph, mgl_vec2f position) {
+    context->gl.glTexCoord2f(glyph->texture_position.x, glyph->texture_position.y);
+    context->gl.glVertex3f(position.x + glyph->position.x, position.y + glyph->position.y, 0.0f);
+
+    context->gl.glTexCoord2f(glyph->texture_position.x + glyph->texture_size.x, glyph->texture_position.y);
+    context->gl.glVertex3f(position.x + glyph->position.x + glyph->size.x, position.y + glyph->position.y, 0.0f);
+
+    context->gl.glTexCoord2f(glyph->texture_position.x + glyph->texture_size.x, glyph->texture_position.y + glyph->texture_size.y);
+    context->gl.glVertex3f(position.x + glyph->position.x + glyph->size.x, position.y + glyph->position.y + glyph->size.y, 0.0f);
+
+    context->gl.glTexCoord2f(glyph->texture_position.x, glyph->texture_position.y + glyph->texture_size.y);
+    context->gl.glVertex3f(position.x + glyph->position.x, position.y + glyph->position.y + glyph->size.y, 0.0f);
+}
+
+/* TODO: Use opengl buffer object instead */
+/* TODO: Cache texture bind to not bind texture if its already bound and do not bind texture 0 */
+void mgl_text_draw(mgl_context *context, mgl_text *text) {
+    const char *str = text->text;
+    mgl_font_glyph glyph;
+    mgl_vec2f position = text->position;
+    position.y += text->font->size;
+
+    context->gl.glColor4f(text->color.r, text->color.g, text->color.b, text->color.a);
+    context->gl.glBindTexture(GL_TEXTURE_2D, text->font->texture.id);
+    context->gl.glBegin(GL_QUADS);
+    while(*str) {
+        unsigned char c = *(unsigned char*)str;
+        if((c >= 32 && c < 128)) {
+            if(mgl_font_get_glyph(text->font, c, &glyph) == 0) {
+                mgl_text_draw_glyph(context, &glyph, position);
+                position.x += glyph.advance;
+            }
+        } else if(c == '\t') {
+            if(mgl_font_get_glyph(text->font, ' ', &glyph) == 0) {
+                const int tab_width = 4;
+                for(int i = 0; i < tab_width; ++i) {
+                    mgl_text_draw_glyph(context, &glyph, position);
+                    position.x += glyph.advance;
+                }
+            }
+        } else if(c == '\n') {
+            position.x = text->position.x;
+            position.y += text->font->size;
+        }
+        ++str;
+    }
+    context->gl.glEnd();
+    context->gl.glBindTexture(GL_TEXTURE_2D, 0);
+}