text drawing using freetype

cudoku.c

@@ -1,9 +1,12 @@
 #include <stdio.h>
 #include <stdbool.h>
+#include <stdlib.h>
 
 #include <glad/gl.h>
 #include "3rdparty/stb/stb_image.h"
 
+#include "cudoku.h"
+#include "font.h"
 #include "shader.h"
 
 static const float quad_vertices[] = {
@@ -31,7 +34,7 @@ void set_scale_factor(int width, int height, float *x, float *y) {
   }
 }
 
-unsigned int prepare_bg(bool use_texture) {
+unsigned int prepare_bg(bool use_texture, unsigned int *texture) {
   unsigned int vbo, vao, ebo;
   glGenVertexArrays(1, &vao);
   glGenBuffers(1, &vbo);
@@ -49,12 +52,11 @@ unsigned int prepare_bg(bool use_texture) {
   glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void *)0);
 
   if (use_texture) {
-    unsigned int texture;
     int tex_width = 0, tex_height = 0;
     unsigned char *tex_data = NULL;
 
-    glGenTextures(1, &texture);
-    glBindTexture(GL_TEXTURE_2D, texture);
+    glGenTextures(1, &(*texture));
+    glBindTexture(GL_TEXTURE_2D, *texture);
 
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
@@ -80,20 +82,38 @@ unsigned int prepare_bg(bool use_texture) {
   return vao;
 }
 
-void draw_bg_grid_shader(Shader shader, int vao, float* transform, float resolution) {
+void draw_bg_grid_shader(Shader shader, unsigned int vao, float* transform, float resolution) {
   use_shader(shader);
 
-  set_mat4(shader, "transform", transform);
+  set_mat4f(shader, "transform", transform);
   set_float(shader, "resolution", resolution);
 
   glBindVertexArray(vao);
   glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
 }
 
-void draw_bg_grid_texture(Shader shader, int vao, float* transform) {
+void draw_bg_grid_texture(Shader shader, unsigned int vao, unsigned int texture, float* transform) {
   use_shader(shader);
-  set_mat4(shader, "transform", transform);
+  set_mat4f(shader, "transform", transform);
 
   glBindVertexArray(vao);
+  glBindTexture(GL_TEXTURE_2D, texture);
   glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
 }
+
+void draw_numbers(Shader shader, unsigned int vao, unsigned int vbo, float *transform, int board[9][9]) {
+  // TODO: go thru the board state and call draw_text() with the appropriate number
+  // and position
+
+  for (int i = 0; i < 9; i++) {
+    for (int j = 0; j < 9; j++) {
+      draw_number(shader, board[i][j], i, j, 5.0f, vao, vbo, transform);
+    }
+  }
+}
+
+void draw_win_overlay(Shader shader, unsigned int vao, unsigned int vbo, float *transform) {
+  const char *text = "You won!";
+  Size text_size = calculate_text_size(text, 1.0f);
+  draw_text(shader, text, text_size, 1.0f, vao, vbo, transform);
+}