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Added fonts to resources folder. Using a font with a 'free' license,

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refer to the license file for details.  Updated text_rendering to load
the font from the resouces folder.  The user doesn't need to do anything
except build the solution.
This commit is contained in:
rich_b
2020-06-23 13:55:09 -04:00
parent 38749dff87
commit 68ea5ee345
5 changed files with 98 additions and 47 deletions
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102
src/7.in_practice/2.text_rendering/text_rendering.cpp
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@@ -12,6 +12,7 @@
#include <ft2build.h>
#include FT_FREETYPE_H
#include <learnopengl/filesystem.h>
#include <learnopengl/shader.h>
void framebuffer_size_callback(GLFWwindow* window, int width, int height);
@@ -86,56 +87,63 @@ int main()
if (FT_Init_FreeType(&ft))
std::cout << "ERROR::FREETYPE: Could not init FreeType Library" << std::endl;
// load font as face
// find path to font
const char *font_name = FileSystem::getPath("resources/fonts/Antonio-Bold.ttf").c_str();
if(!font_name)
std::cout << "ERROR::FREETYPE: Failed to load font_name: " << font_name << std::endl;
// load font as face
FT_Face face;
if (FT_New_Face(ft, "fonts/arial.ttf", 0, &face))
if (FT_New_Face(ft, font_name, 0, &face)) {
std::cout << "ERROR::FREETYPE: Failed to load font" << std::endl;
// set size to load glyphs as
FT_Set_Pixel_Sizes(face, 0, 48);
// disable byte-alignment restriction
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
// load first 128 characters of ASCII set
for (unsigned char c = 0; c < 128; c++)
{
// Load character glyph
if (FT_Load_Char(face, c, FT_LOAD_RENDER))
{
std::cout << "ERROR::FREETYTPE: Failed to load Glyph" << std::endl;
continue;
}
// generate texture
unsigned int 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
);
// set texture options
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_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// now store character for later use
Character character = {
texture,
glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
face->glyph->advance.x
};
Characters.insert(std::pair<char, Character>(c, character));
}
glBindTexture(GL_TEXTURE_2D, 0);
else {
// set size to load glyphs as
FT_Set_Pixel_Sizes(face, 0, 48);
// disable byte-alignment restriction
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
// load first 128 characters of ASCII set
for (unsigned char c = 0; c < 128; c++)
{
// Load character glyph
if (FT_Load_Char(face, c, FT_LOAD_RENDER))
{
std::cout << "ERROR::FREETYTPE: Failed to load Glyph" << std::endl;
continue;
}
// generate texture
unsigned int 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
);
// set texture options
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_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// now store character for later use
Character character = {
texture,
glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
face->glyph->advance.x
};
Characters.insert(std::pair<char, Character>(c, character));
}
glBindTexture(GL_TEXTURE_2D, 0);
}
// destroy FreeType once we're finished
FT_Done_Face(face);
FT_Done_FreeType(ft);