in practice chapter

1 files changed, 0 insertions, 199 deletions

diff --git a/text_rendering/text_rendering.c b/text_rendering/text_rendering.c
deleted file mode 100644
index 398b202..0000000
--- a/text_rendering/text_rendering.c
+++ /dev/null
@@ -1,199 +0,0 @@
-#include <GL/glew.h>
-#include <GLFW/glfw3.h>
-
-#include <ft2build.h>
-#include FT_FREETYPE_H
-
-#include "common.h"
-
-typedef struct {
-	U32 texture_id;
-	V2F size;
-	V2F bearing;
-	U32 advance;
-} char_t;
-
-char_t chars[128];
-static U32 vao, vbo;
-
-V2F get_text_size(const char *text, F32 scale)
-{
-	V2F size = {0};
-	for (const char *c = text; *c; c++) {
-		char_t ch = chars[(U8)*c];
-		F32 h = ch.size.y * scale;
-		if (h > size.y)
-			size.y = h;
-		size.x += (ch.advance >> 6) * scale;
-	}
-	return size;
-}
-
-void render_text(const char *text, U32 shader, V2F pos, F32 scale, V3F color)
-{
-	glUseProgram(shader);
-	shader_set_3fv(shader, "text_color", color);
-	glActiveTexture(GL_TEXTURE0);
-	glBindVertexArray(vao);
-	for (const char *c = text; *c; c++) {
-		char_t ch = chars[(U8)*c];
-		F32 x = pos.x + ch.bearing.x * scale;
-		F32 y = pos.y - (ch.size.y - ch.bearing.y) * scale;
-		F32 w = ch.size.x * scale;
-		F32 h = ch.size.y * scale;
-		F32 vertices[] = {
-			x,     y + h, 0.0f, 0.0f,
-			x,     y,     0.0f, 1.0f,
-			x + w, y,     1.0f, 1.0f,
-
-			x,     y + h, 0.0f, 0.0f,
-			x + w, y,     1.0f, 1.0f,
-			x + w, y + h, 1.0f, 0.0f,
-		};
-		glBindTexture(GL_TEXTURE_2D, ch.texture_id);
-		glBindBuffer(GL_ARRAY_BUFFER, vbo);
-		glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
-		glBindBuffer(GL_ARRAY_BUFFER, 0);
-		glDrawArrays(GL_TRIANGLES, 0, 6);
-		glBindTexture(GL_TEXTURE_2D, 0);
-		pos.x += (ch.advance >> 6) * scale;
-	}
-	glBindVertexArray(0);
-	glUseProgram(0);
-}
-
-void render_bounds(const char *text, U32 shader, V2F pos, F32 scale)
-{
-	glUseProgram(shader);
-	glBindVertexArray(vao);
-	V2F size = get_text_size(text, scale);
-	F32 x = pos.x;
-	F32 y = pos.y;
-	F32 w = size.x;
-	F32 h = size.y;
-	F32 vertices[] = {
-		x,     y + h, 0.0f, 0.0f,
-		x,     y,     0.0f, 1.0f,
-		x + w, y,     1.0f, 1.0f,
-
-		x,     y + h, 0.0f, 0.0f,
-		x + w, y,     1.0f, 1.0f,
-		x + w, y + h, 1.0f, 0.0f,
-	};
-	glBindBuffer(GL_ARRAY_BUFFER, vbo);
-	glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
-	glBindBuffer(GL_ARRAY_BUFFER, 0);
-	glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
-	glDrawArrays(GL_TRIANGLES, 0, 6);
-	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
-	glBindVertexArray(0);
-	glUseProgram(0);
-}
-
-int main(void)
-{
-	state_t state = init_state(1600, 800, 1);
-	init_glfw(&state);
-	init_gl();
-	glEnable(GL_BLEND);
-	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
-	FT_Library ft;
-	if (FT_Init_FreeType(&ft))
-		die("failed to initialize freetype");
-	FT_Face face;
-	const char *font_name = "ibmvga8x16.ttf";
-	if (FT_New_Face(ft, font_name, 0, &face))
-		die("failed to load %s", font_name);
-	FT_Set_Pixel_Sizes(face, 0, 48);
-	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-	for (U32 c = 0; c < 128; c++) {
-		if (FT_Load_Char(face, c, FT_LOAD_RENDER))
-			die("failed to load X character");
-		U32 texture;
-		glGenTextures(1, &texture);
-		glBindTexture(GL_TEXTURE_2D, texture);
-		glTexImage2D(GL_TEXTURE_2D, 0, GL_RED,
-			     face->glyph->bitmap.width,
-			     face->glyph->bitmap.rows,
-			     0, GL_RED, GL_UNSIGNED_BYTE,
-			     face->glyph->bitmap.buffer);
-		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_NEAREST);
-		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-		chars[c] = (char_t){
-			texture,
-		       	{face->glyph->bitmap.width, face->glyph->bitmap.rows},
-		       	{face->glyph->bitmap_left, face->glyph->bitmap_top},
-		       	face->glyph->advance.x
-		};
-
-	}
-	FT_Done_Face(face);
-	FT_Done_FreeType(ft);
-
-	U32 shader = add_shader("glyph.vert", "glyph.frag", 0);
-	MAT4 projection = ortho(0.0f, state.width, 0.0f, state.height, 0.0f, 1.0f);
-	glUseProgram(shader);
-	shader_set_mat4fv(shader, "projection", projection);
-	glUseProgram(0);
-
-	U32 bounds_shader = add_shader("bounds.vert", "bounds.frag", 0);
-	glUseProgram(bounds_shader);
-	shader_set_mat4fv(bounds_shader, "projection", projection);
-	glUseProgram(0);
-	
-	glGenVertexArrays(1, &vao);
-	glGenBuffers(1, &vbo);
-	glBindVertexArray(vao);
-	glBindBuffer(GL_ARRAY_BUFFER, vbo);
-	glBufferData(GL_ARRAY_BUFFER, sizeof(F32) * 6 * 4, 0, GL_DYNAMIC_DRAW);
-	glEnableVertexAttribArray(0);
-	glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 4 * sizeof(F32), 0);
-	glBindBuffer(GL_ARRAY_BUFFER, 0);
-	glBindVertexArray(0);
-
-	glClearColor(0.16f, 0.16f, 0.16f, 1.0f);
-	F32 time = 0.0f;
-
-	V2F pos = {state.width / 2.0f, state.height / 2.0f};
-	V2F vel = {0.5f, 0.5f};
-
-	S32 show_bounds = 0;
-	const char *text = "foo, bar, nope";
-	F32 scale = 1.0f;
-	V2F size = get_text_size(text, scale);
-
-	while (!glfwWindowShouldClose(state.window)) {
-		handle_glfw_events(state.window, &state.input);
-		F32 dt = lock_framerate(60);
-
-		/* update */
-		F32 sin_value = 0.25f * sinf(time) + 0.75f;
-		F32 cos_value = 0.25f * cosf(time) + 0.75f;
-		V3F color = v3f(sin_value, cos_value, sin_value);
-		F32 speed = 256.0f;
-		V2F new_pos = v2f_add(pos, v2f_scalef(vel, speed * dt));
-		if (new_pos.x < 0.0f || new_pos.x + size.x > state.width)
-			vel.x = -vel.x;
-		if (new_pos.y < 0.0f || new_pos.y + size.y > state.height)
-			vel.y = -vel.y;
-		pos = new_pos;
-
-		if (key_first_press(state.input.jump))
-			show_bounds = !show_bounds;
-
-		time += dt;
-
-		/* render */
-		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-		render_text(text, shader, pos, scale, color);
-		if (show_bounds)
-			render_bounds(text, bounds_shader, pos, scale);
-
-		glfwSwapBuffers(state.window);
-	}
-
-	return 0;
-}