-
Notifications
You must be signed in to change notification settings - Fork 1
/
FontDemo.cpp
89 lines (70 loc) · 2.57 KB
/
FontDemo.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
#include "FontDemo.h"
#include <glm/gtc/matrix_transform.hpp>
#include "imgui.h"
#include "misc/cpp/imgui_stdlib.h"
#include <GLFW/glfw3.h>
#include <glm/gtc/type_ptr.hpp>
FontDemo fontDemo;
FontDemo::FontDemo() : Demo("2.1 Font")
{
}
void FontDemo::init()
{
unsigned char* ttf_buffer = new unsigned char[1 << 20];
unsigned char* temp_bitmap = new unsigned char[512 * 512];
fread(ttf_buffer, 1, 1 << 20, fopen("c:/windows/fonts/times.ttf", "rb"));
stbtt_BakeFontBitmap(ttf_buffer, 0, 32.0, temp_bitmap, 512, 512, 32, 96, cdata); // no guarantee this fits!
glGenTextures(1, &texId);
glBindTexture(GL_TEXTURE_2D, texId);
GLint swizzleMask[] = { GL_ALPHA, GL_ALPHA, GL_ALPHA, GL_ALPHA };
glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_RGBA, swizzleMask);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 512, 512, 0, GL_ALPHA, GL_UNSIGNED_BYTE, temp_bitmap);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
delete[] ttf_buffer;
delete[] temp_bitmap;
}
void FontDemo::draw()
{
int viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
tigl::shader->setProjectionMatrix(glm::ortho(0.0f, (float)viewport[2], (float)viewport[3], 0.0f, -100.0f, 100.0f));
tigl::shader->setViewMatrix(glm::mat4(1.0f));
tigl::shader->setModelMatrix(glm::mat4(1.0f));
tigl::shader->enableColor(false);
tigl::shader->enableLighting(false);
tigl::shader->enableTexture(true);
tigl::shader->enableColorMult(true);
tigl::shader->setColorMult(color);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_DEPTH_TEST);
glBindTexture(GL_TEXTURE_2D, texId);
float x = 400, y = 300;
stbtt_aligned_quad q;
tigl::begin(GL_QUADS);
for (int i = 0; i < text.size(); i++) {
if (text[i] >= 32 && text[i] < 128) {
stbtt_GetBakedQuad(cdata, 512, 512, text[i] - 32, &x, &y, &q, 1);//1=opengl & d3d10+,0=d3d9
tigl::addVertex(Vertex::PT(glm::vec3(q.x0, q.y0, 0), glm::vec2(q.s0, q.t0)));
tigl::addVertex(Vertex::PT(glm::vec3(q.x1, q.y0, 0), glm::vec2(q.s1, q.t0)));
tigl::addVertex(Vertex::PT(glm::vec3(q.x1, q.y1, 0), glm::vec2(q.s1, q.t1)));
tigl::addVertex(Vertex::PT(glm::vec3(q.x0, q.y1, 0), glm::vec2(q.s0, q.t1)));
}
}
tigl::end();
tigl::shader->enableColorMult(false);
{
ImGui::SetNextWindowPos(ImVec2(ImGui::GetIO().DisplaySize.x - 500, 0));
ImGui::SetNextWindowSize(ImVec2(500, 0));
ImGui::Begin("Font Demo");
ImGui::SetWindowFontScale(1.5f);
ImGui::BeginGroup();
ImGui::InputText("##Text", &text);
ImGui::ColorEdit4("Color", glm::value_ptr(color));
ImGui::EndGroup();
ImGui::End();
}
}
void FontDemo::update(GLFWwindow* window)
{
}