// ------------------------------------------------------------------- init ---
void init( void )
{
size_t i;
vec2 pen = {{0,0}};
vec4 color = {{0,0,0,1}};
atlas = texture_atlas_new( 512, 512, 1 );
font = texture_font_new_from_file( atlas, 12, "../media/fonts/VeraMono.ttf" );
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
pen.y = -font->descender;
for( i=0; i<line_count; ++i )
{
pen.x = 10.0;
add_text( buffer, font, text, &color, &pen );
pen.y += font->height - font->linegap;
}
glClearColor( 1.0, 1.0, 1.0, 1.0 );
glDisable( GL_DEPTH_TEST );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
glEnable( GL_TEXTURE_2D );
glEnable( GL_BLEND );
shader = shader_load("../media/shaders/v3f-t2f-c4f.vert",
"../media/shaders/v3f-t2f-c4f.frag");
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
TextureFont::TextureFont(TextureAtlas* atlas,
const std::string& filename,
const float size )
: self_(texture_font_new_from_file(static_cast<texture_atlas_t*>(atlas->RawGet()),
size,
filename.c_str())),
atlas_(atlas) {}
// ------------------------------------------------------------------- init ---
void init( void )
{
atlas = texture_atlas_new( 512, 512, 1 );
auto filename = "fonts/Vera.ttf";
auto text = "A Quick Brown Fox Jumps Over The Lazy Dog 0123456789";
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
vec2 pen = {0,0};
auto black = vec4{1,1,1,1};
auto font = texture_font_new_from_file( atlas, 48, filename );
font->rendermode = RENDER_SIGNED_DISTANCE_FIELD;
auto bbox = add_text( buffer, font, text, &black, &pen );
size_t i;
auto vertices = buffer->vertices;
for( i=0; i< vector_size(vertices); ++i ) {
auto vert = (vertex *) vector_get(vertices,i);
vert->x -= (int)(bbox.x + bbox.width/2);
vert->y -= (int)(bbox.y + bbox.height/2);
}
glGenTextures( 1, &atlas->id );
glBindTexture( GL_TEXTURE_2D, atlas->id );
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_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D( GL_TEXTURE_2D, 0, GL_RED, atlas->width, atlas->height,
0, GL_RED, GL_UNSIGNED_BYTE, atlas->data );
shader = shader_load( "shaders/distance-field-2v5.vert",
"shaders/distance-field-2v5.frag" );
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
// ------------------------------------------------------------------- init ---
void init( void )
{
atlas = texture_atlas_new( 512, 512, 1 );
font = texture_font_new_from_file( atlas, 32, "../media/fonts/Vera.ttf" );
texture_glyph_t *glyph;
// Generate the glyp at 512 points, compute distance field and scale it
// back to 32 points
// Just load another glyph if you want to see difference (draw render a '@')
glyph = load_glyph( "../media/fonts/Vera.ttf", "@", 512, 64, 0.1);
vector_push_back( font->glyphs, &glyph );
texture_atlas_upload( atlas );
glyph = texture_font_get_glyph( font, "@");
GLuint indices[6] = {0,1,2, 0,2,3};
vertex_t vertices[4] = { { -.5,-.5,0, glyph->s0,glyph->t1, 0,0,0,1 },
{ -.5, .5,0, glyph->s0,glyph->t0, 0,0,0,1 },
{ .5, .5,0, glyph->s1,glyph->t0, 0,0,0,1 },
{ .5,-.5,0, glyph->s1,glyph->t1, 0,0,0,1 } };
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
vertex_buffer_push_back( buffer, vertices, 4, indices, 6 );
program = shader_load( "../media/shaders/distance-field.vert",
"../media/shaders/distance-field-2.frag" );
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
// ----------------------------------------- font_manager_get_from_filename ---
texture_font_t *
font_manager_get_from_filename( font_manager_t *self,
const char * filename,
const float size )
{
size_t i;
texture_font_t *font;
assert( self );
for( i=0; i<vector_size(self->fonts); ++i )
{
font = * (texture_font_t **) vector_get( self->fonts, i );
if( (strcmp(font->filename, filename) == 0) && ( font->size == size) )
{
return font;
}
}
font = texture_font_new_from_file( self->atlas, size, filename );
if( font )
{
vector_push_back( self->fonts, &font );
texture_font_load_glyphs( font, self->cache );
return font;
}
fprintf( stderr, "Unable to load \"%s\" (size=%.1f)\n", filename, size );
return 0;
}
// ------------------------------------------------------------------- main ---
int
main( int argc, char **argv )
{
glutInit( &argc, argv );
glutInitWindowSize( 800, 600 );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );
glutCreateWindow( "Signed Distance Field" );
glutReshapeFunc( reshape );
glutDisplayFunc( display );
glutKeyboardFunc( keyboard );
#ifndef __APPLE__
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
#endif
texture_font_t *font = 0;
texture_atlas_t *atlas = texture_atlas_new( 512, 512, 1 );
const char * filename = "fonts/Vera.ttf";
wchar_t *text = L"A Quick Brown Fox Jumps Over The Lazy Dog 0123456789";
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
vec2 pen = {{0,0}};
vec4 black = {{1,1,1,1}};
font = texture_font_new_from_file( atlas, 48, filename );
vec4 bbox = add_text( buffer, font, text, &black, &pen );
size_t i;
vector_t * vertices = buffer->vertices;
for( i=0; i< vector_size(vertices); ++i )
{
vertex_t * vertex = (vertex_t *) vector_get(vertices,i);
vertex->x -= (int)(bbox.x + bbox.width/2);
vertex->y -= (int)(bbox.y + bbox.height/2);
}
glBindTexture( GL_TEXTURE_2D, atlas->id );
fprintf( stderr, "Generating distance map...\n" );
unsigned char *map = make_distance_map(atlas->data, atlas->width, atlas->height);
fprintf( stderr, "done !\n");
memcpy( atlas->data, map, atlas->width*atlas->height*sizeof(unsigned char) );
free(map);
texture_atlas_upload( atlas );
shader = shader_load( "shaders/distance-field-2.vert",
"shaders/distance-field-2.frag" );
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
glutMainLoop( );
return 0;
}
// ------------------------------------------------------------------- main ---
int main( int argc, char **argv )
{
size_t width = 800, height = 200;
glutInit( &argc, argv );
glutInitWindowSize( width, height );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );
glutCreateWindow( "Glyph Cartoon" );
glutReshapeFunc( reshape );
glutDisplayFunc( display );
glutKeyboardFunc( keyboard );
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
atlas = texture_atlas_new( 1024, 1024, 1 );
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
texture_font_t *font =
texture_font_new_from_file( atlas, 128, "fonts/ObelixPro.ttf" );
vec2 pen = {{50, 50}};
vec4 black = {{0.0, 0.0, 0.0, 1.0}};
vec4 yellow = {{1.0, 1.0, 0.0, 1.0}};
vec4 orange1 = {{1.0, 0.9, 0.0, 1.0}};
vec4 orange2 = {{1.0, 0.6, 0.0, 1.0}};
font->outline_type = 2;
font->outline_thickness = 7;
add_text( buffer, font, L"Freetype GL", pen, black, black );
font->outline_type = 2;
font->outline_thickness = 5;
add_text( buffer, font, L"Freetype GL", pen, yellow, yellow );
font->outline_type = 1;
font->outline_thickness = 3;
add_text( buffer, font, L"Freetype GL", pen, black, black );
font->outline_type = 0;
font->outline_thickness = 0;
add_text( buffer, font, L"Freetype GL", pen, orange1, orange2 );
shader = shader_load("shaders/v3f-t2f-c4f.vert",
"shaders/v3f-t2f-c4f.frag");
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
glutMainLoop( );
return 0;
}
bool Font::Load(const std::string &file, float size) {
if (Font::Atlas == null) {
Font::Atlas = texture_atlas_new(1024, 1024, 1);
}
this->FontHandle = texture_font_new_from_file(Font::Atlas, size, file.c_str());
if (this->FontHandle == nullptr) return false;
texture_font_load_glyphs(this->FontHandle, L"~!@#$%^&*()_+`1234567890-=QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm|\\<>?,./:;\"'}{][”“’\n");
return true;
}
// ------------------------------------------------------------------- main ---
int
main( int argc, char **argv )
{
glutInit( &argc, argv );
glutInitWindowSize( 512, 512 );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );
glutCreateWindow( "Freetype OpenGL width shaders" );
glutReshapeFunc( reshape );
glutDisplayFunc( display );
glutMotionFunc( mouse_drag );
glutPassiveMotionFunc( mouse_motion );
glutKeyboardFunc( keyboard );
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
unsigned char *map;
texture_font_t * font;
const char *filename = "fonts/Vera.ttf";
const wchar_t *cache = L" !\"#$%&'()*+,-./0123456789:;<=>?"
L"@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"
L"`abcdefghijklmnopqrstuvwxyz{|}~";
atlas = texture_atlas_new( 512, 512, 1 );
font = texture_font_new_from_file( atlas, 72, filename );
texture_font_load_glyphs( font, cache );
texture_font_delete( font );
fprintf( stderr, "Generating distance map...\n" );
map = make_distance_map(atlas->data, atlas->width, atlas->height);
fprintf( stderr, "done !\n");
memcpy( atlas->data, map, atlas->width*atlas->height*sizeof(unsigned char) );
free(map);
texture_atlas_upload( atlas );
// Create the GLSL program
program = shader_load( "shaders/distance-field.vert",
"shaders/distance-field.frag" );
glUseProgram( program );
glutMainLoop( );
return 0;
}
// ------------------------------------------------------------------- main ---
int main( int argc, char **argv )
{
glutInit( &argc, argv );
glutInitWindowSize( 800, 400 );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );
glutCreateWindow( "Freetype OpenGL / LCD filtering" );
glutReshapeFunc( reshape );
glutDisplayFunc( display );
glutKeyboardFunc( keyboard );
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
size_t i;
texture_font_t *font = 0;
atlas = texture_atlas_new( 512, 512, 3 );
const char * filename = "fonts/Vera.ttf";
wchar_t *text = L"A Quick Brown Fox Jumps Over The Lazy Dog 0123456789";
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f,ashift:1f,agamma:1f" );
vec2 pen = {{0,0}};
vec4 color = {{0,0,0,1}};
for( i=7; i < 27; ++i)
{
font = texture_font_new_from_file( atlas, i, filename );
pen.x = 0;
pen.y -= font->height;
texture_font_load_glyphs( font, text );
add_text( buffer, font, text, &color, &pen );
texture_font_delete( font );
}
glBindTexture( GL_TEXTURE_2D, atlas->id );
shader = shader_load( "shaders/text.vert",
"shaders/text.frag" );
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
glutMainLoop( );
return 0;
}
Stats::Stats(int viewport_width, int viewport_height)
: texture_atlas(0)
, texture_font(0)
, vertex_count(0)
, position_vbo(0)
, texcoord_vbo(0)
, vao(0)
, sampler(0)
, text_vs(0)
, text_fs(0)
, text_program(0)
, uniform_instance_buffer(0)
{
texture_atlas = texture_atlas_new(512, 512, 1);
texture_font = texture_font_new_from_file(texture_atlas, 11, (DIRECTORY_FONTS + FILE_DEFAULT_FONT).c_str());
texture_font_load_glyphs(texture_font, FONT_CHARSET_CACHE);
// Create a sampler object for the font.
glGenSamplers(1, &sampler);
glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// Load the shader program.
text_vs = compile_shader_from_file(DIRECTORY_SHADERS + FILE_TEXT_VS, GL_VERTEX_SHADER);
text_fs = compile_shader_from_file(DIRECTORY_SHADERS + FILE_TEXT_FS, GL_FRAGMENT_SHADER);
text_program = glCreateProgram();
glAttachShader(text_program, text_vs);
glAttachShader(text_program, text_fs);
link_program(text_program);
// Setup a scale matrix to go from screen space to normalized device space.
glm::mat3 scale(2.0f / viewport_width, 0.0f, 0.0f,
0.0f, 2.0f / viewport_height, 0.0f,
0.0f, 0.0f, 1.0f);
glm::mat3 translation(1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
MARGIN_X, MARGIN_Y, 1.0f);
uniform_instance_data.model_matrix = glm::mat3x4(translation * scale);
uniform_instance_data.color = glm::vec4(1.0f, 1.0f, 0.0f, 1.0f);
glGenBuffers(1, &uniform_instance_buffer);
glBindBufferBase(GL_UNIFORM_BUFFER, UNIFORM_INSTANCE_BINDING, uniform_instance_buffer);
glBufferData(GL_UNIFORM_BUFFER, sizeof(TextPerInstance), &uniform_instance_data, GL_DYNAMIC_DRAW);
}
// ------------------------------------------------------------------- init ---
void init( void )
{
atlas = texture_atlas_new( 1024, 1024, 1 );
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
texture_font_t *font =
texture_font_new_from_file( atlas, 128, "fonts/LuckiestGuy.ttf" );
vec2 pen = {{50, 50}};
vec4 black = {{0.0, 0.0, 0.0, 1.0}};
vec4 yellow = {{1.0, 1.0, 0.0, 1.0}};
vec4 orange1 = {{1.0, 0.9, 0.0, 1.0}};
vec4 orange2 = {{1.0, 0.6, 0.0, 1.0}};
font->rendermode = RENDER_OUTLINE_POSITIVE;
font->outline_thickness = 7;
add_text( buffer, font, "Freetype GL", pen, black, black );
font->rendermode = RENDER_OUTLINE_POSITIVE;
font->outline_thickness = 5;
add_text( buffer, font, "Freetype GL", pen, yellow, yellow );
font->rendermode = RENDER_OUTLINE_EDGE;
font->outline_thickness = 3;
add_text( buffer, font, "Freetype GL", pen, black, black );
font->rendermode = RENDER_NORMAL;
font->outline_thickness = 0;
add_text( buffer, font, "Freetype GL", pen, orange1, orange2 );
glGenTextures( 1, &atlas->id );
glBindTexture( GL_TEXTURE_2D, atlas->id );
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_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D( GL_TEXTURE_2D, 0, GL_RED, atlas->width, atlas->height,
0, GL_RED, GL_UNSIGNED_BYTE, atlas->data );
shader = shader_load("shaders/v3f-t2f-c4f.vert",
"shaders/v3f-t2f-c4f.frag");
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
// ------------------------------------------------------------------- main ---
int
main( int argc, char **argv )
{
glutInit( &argc, argv );
glutInitWindowSize( 512, 512 );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );
glutCreateWindow( "Distance fields demo" );
glutReshapeFunc( reshape );
glutDisplayFunc( display );
glutKeyboardFunc( keyboard );
glutTimerFunc( 1000.0/60, timer, 60 );
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
program = shader_load( "shaders/distance-field.vert",
"shaders/distance-field-3.frag" );
glUseProgram( program );
atlas = texture_atlas_new( 512, 512, 1 );
font = texture_font_new_from_file( atlas, 32, "fonts/Vera.ttf" );
texture_glyph_t *glyph;
// Generate the glyp at 512 points, compute distance field and scale it
// back to 32 points
// Just load another glyph if you want to see difference (draw render a '@')
glyph = load_glyph( "fonts/Vera.ttf", L'@', 512, 64, 0.1);
vector_push_back( font->glyphs, &glyph );
texture_atlas_upload( atlas );
glutMainLoop( );
return 0;
}
// ------------------------------------------------------------------- init ---
void init( void )
{
texture_font_t *font = 0;
texture_atlas_t *atlas = texture_atlas_new( 512, 512, 1 );
const char * filename = "fonts/Vera.ttf";
char *text = "A Quick Brown Fox Jumps Over The Lazy Dog 0123456789";
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
vec2 pen = {{0,0}};
vec4 black = {{1,1,1,1}};
font = texture_font_new_from_file( atlas, 48, filename );
vec4 bbox = add_text( buffer, font, text, &black, &pen );
texture_atlas_upload( font->atlas );
size_t i;
vector_t * vertices = buffer->vertices;
for( i=0; i< vector_size(vertices); ++i )
{
vertex_t * vertex = (vertex_t *) vector_get(vertices,i);
vertex->x -= (int)(bbox.x + bbox.width/2);
vertex->y -= (int)(bbox.y + bbox.height/2);
}
glBindTexture( GL_TEXTURE_2D, atlas->id );
fprintf( stderr, "Generating distance map...\n" );
unsigned char *map = make_distance_mapb(atlas->data, atlas->width, atlas->height);
fprintf( stderr, "done !\n");
memcpy( atlas->data, map, atlas->width*atlas->height*sizeof(unsigned char) );
free(map);
texture_atlas_upload( atlas );
shader = shader_load( "shaders/distance-field.vert",
"shaders/distance-field-2.frag" );
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
// ------------------------------------------------------------------- init ---
void init( void )
{
size_t i;
texture_font_t *font = 0;
atlas = texture_atlas_new( 512, 512, 3 );
const char * filename = "fonts/Vera.ttf";
char * text = "A Quick Brown Fox Jumps Over The Lazy Dog 0123456789";
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f,ashift:1f,agamma:1f" );
vec2 pen = {{0,0}};
vec4 color = {{0,0,0,1}};
for( i=7; i < 27; ++i)
{
font = texture_font_new_from_file( atlas, i, filename );
pen.x = 0;
pen.y -= font->height;
texture_font_load_glyphs( font, text );
add_text( buffer, font, text, &color, &pen );
texture_font_delete( font );
}
glGenTextures( 1, &atlas->id );
glBindTexture( GL_TEXTURE_2D, atlas->id );
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_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, atlas->width, atlas->height,
0, GL_RGB, GL_UNSIGNED_BYTE, atlas->data );
shader = shader_load( "shaders/text.vert",
"shaders/text.frag" );
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
// ------------------------------------------------------------------- init ---
void init( void )
{
size_t i;
atlas = texture_atlas_new( 512, 512, 1 );
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
vec4 white = {{1.0, 1.0, 1.0, 1.0}};
vec4 none = {{1.0, 1.0, 1.0, 0.0}};
markup_t markup;
markup.family = "../media/fonts/Vera.ttf";
markup.size = 80.0;
markup.bold = 0;
markup.italic = 0;
markup.rise = 0.0;
markup.spacing = 0.0;
markup.gamma = 1.5;
markup.foreground_color = white;
markup.background_color = none;
markup.underline = 0;
markup.underline_color = white;
markup.overline = 0;
markup.overline_color = white;
markup.strikethrough = 0;
markup.strikethrough_color = white;
markup.font = 0;
markup.font = texture_font_new_from_file( atlas, markup.size, "../media/fonts/Vera.ttf" );
markup.font->outline_type = 1;
vec2 pen;
pen.x = 40;
pen.y = 190;
for( i=0; i< 10; ++i)
{
markup.font->outline_thickness = 2*((i+1)/10.0);
add_text( buffer, &pen, &markup, "g", NULL );
}
pen.x = 40;
pen.y = 110;
markup.font->outline_type = 2;
for( i=0; i< 10; ++i)
{
markup.font->outline_thickness = 2*((i+1)/10.0);
add_text( buffer, &pen, &markup, "g", NULL );
}
pen.x = 40;
pen.y = 30;
markup.font->outline_type = 3;
for( i=0; i< 10; ++i)
{
markup.font->outline_thickness = 1*((i+1)/10.0);
add_text( buffer, &pen, &markup, "g", NULL );
}
shader = shader_load("../media/shaders/v3f-t2f-c4f.vert",
"../media/shaders/v3f-t2f-c4f.frag");
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
// ------------------------------------------------------------------- main ---
int main( int argc, char **argv )
{
GLFWwindow* window;
glfwSetErrorCallback( error_callback );
if (!glfwInit( ))
{
exit( EXIT_FAILURE );
}
glfwWindowHint( GLFW_VISIBLE, GL_TRUE );
glfwWindowHint( GLFW_RESIZABLE, GL_FALSE );
window = glfwCreateWindow( 1, 1, "Glyph Cartoon", NULL, NULL );
if (!window)
{
glfwTerminate( );
exit( EXIT_FAILURE );
}
glfwMakeContextCurrent( window );
glfwSwapInterval( 1 );
glfwSetFramebufferSizeCallback( window, reshape );
glfwSetWindowRefreshCallback( window, display );
glfwSetKeyCallback( window, keyboard );
#ifndef __APPLE__
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
#endif
atlas = texture_atlas_new( 1024, 1024, 1 );
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
texture_font_t *font =
texture_font_new_from_file( atlas, 128, "fonts/LuckiestGuy.ttf" );
vec2 pen = {{50, 50}};
vec4 black = {{0.0, 0.0, 0.0, 1.0}};
vec4 yellow = {{1.0, 1.0, 0.0, 1.0}};
vec4 orange1 = {{1.0, 0.9, 0.0, 1.0}};
vec4 orange2 = {{1.0, 0.6, 0.0, 1.0}};
font->outline_type = 2;
font->outline_thickness = 7;
add_text( buffer, font, L"Freetype GL", pen, black, black );
font->outline_type = 2;
font->outline_thickness = 5;
add_text( buffer, font, L"Freetype GL", pen, yellow, yellow );
font->outline_type = 1;
font->outline_thickness = 3;
add_text( buffer, font, L"Freetype GL", pen, black, black );
font->outline_type = 0;
font->outline_thickness = 0;
add_text( buffer, font, L"Freetype GL", pen, orange1, orange2 );
shader = shader_load("shaders/v3f-t2f-c4f.vert",
"shaders/v3f-t2f-c4f.frag");
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
glfwSetWindowSize( window, 850, 200 );
glfwShowWindow( window );
while(!glfwWindowShouldClose( window ))
{
display( window );
glfwPollEvents( );
}
glfwDestroyWindow( window );
glfwTerminate( );
return 0;
}
// ----------------------------------------------------------- build_buffer ---
void
build_buffer( void )
{
vec2 pen;
texture_font_t *font;
vec4 black = {{0.0, 0.0, 0.0, 1.0}};
vec4 white = {{1.0, 1.0, 1.0, 1.0}};
vec4 none = {{1.0, 1.0, 1.0, 0.0}};
vec4 color = white;
if( p_invert )
{
color = black;
}
markup_t markup = {
.family = "Source Sans Pro",
.size = 10.0,
.bold = 0,
.italic = 0,
.spacing = p_interval,
.gamma = p_gamma,
.foreground_color = color,
.background_color = none,
.underline = 0,
.underline_color = color,
.overline = 0,
.overline_color = color,
.strikethrough = 0,
.strikethrough_color = color,
.font = 0,
};
text_buffer_clear( text_buffer );
texture_atlas_t * atlas = font_manager->atlas;
texture_atlas_clear( atlas );
if( p_family == VERA)
{
font = texture_font_new_from_file( atlas, p_size, "fonts/Vera.ttf" );
}
else if( p_family == VERA_MONO)
{
font = texture_font_new_from_file( atlas, p_size, "fonts/VeraMono.ttf" );
}
else if( p_family == LUCKIEST_GUY)
{
font = texture_font_new_from_file( atlas, p_size, "fonts/LuckiestGuy.ttf" );
}
else if( p_family == SOURCE_SANS )
{
font = texture_font_new_from_file( atlas, p_size, "fonts/SourceSansPro-Regular.ttf" );
}
else if( p_family == SOURCE_CODE )
{
font = texture_font_new_from_file( atlas, p_size, "fonts/SourceCodePro-Regular.ttf" );
}
else if( p_family == OLD_STANDARD )
{
font = texture_font_new_from_file( atlas, p_size, "fonts/OldStandard-Regular.ttf" );
}
else if( p_family == LOBSTER )
{
font = texture_font_new_from_file( atlas, p_size, "fonts/Lobster-Regular.ttf" );
}
else
{
fprintf( stderr, "Error : Unknown family type\n" );
return;
}
if (!font)
return;
markup.font = font;
font->hinting = p_hinting;
font->kerning = p_kerning;
font->filtering = 1;
float norm = 1.0/(p_primary + 2*p_secondary + 2*p_tertiary);
font->lcd_weights[0] = (unsigned char)(p_tertiary*norm*255);
font->lcd_weights[1] = (unsigned char)(p_secondary*norm*255);
font->lcd_weights[2] = (unsigned char)(p_primary*norm*255);
font->lcd_weights[3] = (unsigned char)(p_secondary*norm*255);
font->lcd_weights[4] = (unsigned char)(p_tertiary*norm*255);
pen.x = 10;
pen.y = 600 - font->height - 10;
text_buffer_printf( text_buffer, &pen, &markup, text, NULL );
// Post-processing for width and orientation
vertex_buffer_t * vbuffer = text_buffer->buffer;
size_t i;
for( i=0; i < vector_size( vbuffer->items ); ++i )
{
ivec4 *item = (ivec4 *) vector_get( vbuffer->items, i);
glyph_vertex_t * v0 = /* x0,y0 */
(glyph_vertex_t *) vector_get( vbuffer->vertices, item->vstart+0 );
//glyph_vertex_t * v1 = /* x0,y1 */
// (glyph_vertex_t *) vector_get( vbuffer->vertices, item->vstart+1 );
glyph_vertex_t * v2 = /* x1,y1 */
(glyph_vertex_t *) vector_get( vbuffer->vertices, item->vstart+2 );
glyph_vertex_t * v3 = /* x1,y0 */
(glyph_vertex_t *) vector_get( vbuffer->vertices, item->vstart+3 );
float x0 = v0->x, y0 = v0->y;
float x1 = v2->x, y1 = v2->y;
v2->x = v3->x = x0 + (x1-x0)*p_width;
float dy = fabs(y1-y0);
float dx = tan(p_faux_italic/180.0 * M_PI) * dy;
v0->x += dx;
v0->shift = fmod(v0->shift + dx-(int)(dx),1.0);
v3->x += dx;
v3->shift = fmod(v3->shift + dx-(int)(dx),1.0);
}
glBindTexture( GL_TEXTURE_2D, font_manager->atlas->id );
GLenum gl_format = (font_manager->atlas->depth == LCD_FILTERING_OFF) ?
GL_RED : GL_RGB;
glTexImage2D( GL_TEXTURE_2D, 0, gl_format, font_manager->atlas->width,
font_manager->atlas->height, 0, gl_format, GL_UNSIGNED_BYTE,
font_manager->atlas->data );
texture_font_delete( font );
}
// ------------------------------------------------------------------- quit ---
void reset( void )
{
p_family = VERA;
p_size = 12.0;
p_invert = 0;
p_kerning = 1;
p_hinting = 1;
p_lcd_filtering = 1;
p_gamma = 1.75;
p_interval = 0.0;
p_weight = 0.33;
p_width = 1.0;
p_faux_weight = 0.0;
p_faux_italic = 0.0;
// FT_LCD_FILTER_LIGHT
p_primary = 1.0/3.0;
p_secondary = 1.0/3.0;
p_tertiary = 0.0/3.0;
// FT_LCD_FILTER_DEFAULT
// p_primary = 3.0/9.0;
// p_secondary = 2.0/9.0;
// p_tertiary = 1.0/9.0;
build_buffer();
}
// ----------------------------------------------------------- build_buffer ---
void
build_buffer( void )
{
vec2 pen;
texture_font_t *font;
vec4 black = {{0.0, 0.0, 0.0, 1.0}};
vec4 white = {{1.0, 1.0, 1.0, 1.0}};
vec4 none = {{1.0, 1.0, 1.0, 0.0}};
vec4 color = white;
if( p_invert )
{
color = black;
}
markup_t markup = {
.family = "Source Sans Pro",
.size = 10.0,
.bold = 0,
.italic = 0,
.rise = 0.0,
.spacing = p_interval,
.gamma = p_gamma,
.foreground_color = color,
.background_color = none,
.underline = 0,
.underline_color = color,
.overline = 0,
.overline_color = color,
.strikethrough = 0,
.strikethrough_color = color,
.font = 0,
};
text_buffer_clear( buffer );
texture_atlas_t * atlas = buffer->manager->atlas;
texture_atlas_clear( atlas );
if( p_family == VERA)
{
font = texture_font_new_from_file( atlas, p_size, "fonts/Vera.ttf" );
}
else if( p_family == VERA_MONO)
{
font = texture_font_new_from_file( atlas, p_size, "fonts/VeraMono.ttf" );
}
else if( p_family == LUCKIEST_GUY)
{
font = texture_font_new_from_file( atlas, p_size, "fonts/LuckiestGuy.ttf" );
}
else if( p_family == SOURCE_SANS )
{
font = texture_font_new_from_file( atlas, p_size, "fonts/SourceSansPro-Regular.ttf" );
}
else if( p_family == SOURCE_CODE )
{
font = texture_font_new_from_file( atlas, p_size, "fonts/SourceCodePro-Regular.ttf" );
}
else if( p_family == OLD_STANDARD )
{
font = texture_font_new_from_file( atlas, p_size, "fonts/OldStandard-Regular.ttf" );
}
else if( p_family == LOBSTER )
{
font = texture_font_new_from_file( atlas, p_size, "fonts/Lobster-Regular.ttf" );
}
else
{
fprintf( stderr, "Error : Unknown family type\n" );
return;
}
if (!font)
return;
markup.font = font;
font->hinting = p_hinting;
font->kerning = p_kerning;
font->filtering = 1;
float norm = 1.0/(p_primary + 2*p_secondary + 2*p_tertiary);
font->lcd_weights[0] = (unsigned char)(p_tertiary*norm*256);
font->lcd_weights[1] = (unsigned char)(p_secondary*norm*256);
font->lcd_weights[2] = (unsigned char)(p_primary*norm*256);
font->lcd_weights[3] = (unsigned char)(p_secondary*norm*256);
font->lcd_weights[4] = (unsigned char)(p_tertiary*norm*256);
pen.x = 10;
pen.y = 600 - font->height - 10;
text_buffer_printf( buffer, &pen, &markup, text, NULL );
// Post-processing for width and orientation
vertex_buffer_t * vbuffer = buffer->buffer;
size_t i;
for( i=0; i < vector_size( vbuffer->items ); ++i )
{
ivec4 *item = (ivec4 *) vector_get( vbuffer->items, i);
glyph_vertex_t * v0 = /* x0,y0 */
(glyph_vertex_t *) vector_get( vbuffer->vertices, item->vstart+0 );
//glyph_vertex_t * v1 = /* x0,y1 */
// (glyph_vertex_t *) vector_get( vbuffer->vertices, item->vstart+1 );
glyph_vertex_t * v2 = /* x1,y1 */
(glyph_vertex_t *) vector_get( vbuffer->vertices, item->vstart+2 );
glyph_vertex_t * v3 = /* x1,y0 */
(glyph_vertex_t *) vector_get( vbuffer->vertices, item->vstart+3 );
float x0 = v0->x, y0 = v0->y;
float x1 = v2->x, y1 = v2->y;
v2->x = v3->x = x0 + (x1-x0)*p_width;
float dy = abs(y1-y0);
float dx = tan(p_faux_italic/180.0 * M_PI) * dy;
v0->x += dx;
v0->shift = fmod(v0->shift + dx-(int)(dx),1.0);
v3->x += dx;
v3->shift = fmod(v3->shift + dx-(int)(dx),1.0);
}
texture_font_delete( font );
}
// ---------------------------------------------------------------- display ---
void display( GLFWwindow* window )
{
vec4 black = {{0.0, 0.0, 0.0, 1.0}};
vec4 white = {{1.0, 1.0, 1.0, 1.0}};
if( !p_invert )
{
glClearColor( 0, 0, 0, 1 );
buffer->base_color = white;
}
else
{
glClearColor( 1, 1, 1, 1 );
buffer->base_color = black;
}
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glUseProgram( buffer->shader );
{
glUniformMatrix4fv( glGetUniformLocation( buffer->shader, "model" ),
1, 0, model.data);
glUniformMatrix4fv( glGetUniformLocation( buffer->shader, "view" ),
1, 0, view.data);
glUniformMatrix4fv( glGetUniformLocation( buffer->shader, "projection" ),
1, 0, projection.data);
text_buffer_render( buffer );
}
TwDraw( );
glfwSwapBuffers( window );
}
// ------------------------------------------------------------------- main ---
int main( int argc, char **argv )
{
GLFWwindow* window;
glfwSetErrorCallback( error_callback );
if (!glfwInit( ))
{
exit( EXIT_FAILURE );
}
glfwWindowHint( GLFW_VISIBLE, GL_TRUE );
glfwWindowHint( GLFW_RESIZABLE, GL_FALSE );
window = glfwCreateWindow( 1, 1, "Freetype OpenGL / LCD filtering", NULL, NULL );
if (!window)
{
glfwTerminate( );
exit( EXIT_FAILURE );
}
glfwMakeContextCurrent( window );
glfwSwapInterval( 1 );
glfwSetFramebufferSizeCallback( window, reshape );
glfwSetWindowRefreshCallback( window, display );
glfwSetKeyCallback( window, keyboard );
#ifndef __APPLE__
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
#endif
size_t i;
texture_font_t *font = 0;
atlas = texture_atlas_new( 512, 512, 3 );
const char * filename = "fonts/Vera.ttf";
wchar_t *text = L"A Quick Brown Fox Jumps Over The Lazy Dog 0123456789";
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f,ashift:1f,agamma:1f" );
vec2 pen = {{0,0}};
vec4 color = {{0,0,0,1}};
for( i=7; i < 27; ++i)
{
font = texture_font_new_from_file( atlas, i, filename );
pen.x = 0;
pen.y -= font->height;
texture_font_load_glyphs( font, text );
add_text( buffer, font, text, &color, &pen );
texture_font_delete( font );
}
glBindTexture( GL_TEXTURE_2D, atlas->id );
shader = shader_load( "shaders/text.vert",
"shaders/text.frag" );
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
glfwSetWindowSize( window, 800, 500 );
glfwShowWindow( window );
while(!glfwWindowShouldClose( window ))
{
display( window );
glfwPollEvents( );
}
glfwDestroyWindow( window );
glfwTerminate( );
return 0;
}
// ------------------------------------------------------------------- main ---
int main( int argc, char **argv )
{
int width = 600;
int height = 600;
glutInit( &argc, argv );
glutInitWindowSize( width, height );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );
glutCreateWindow( "Freetype OpenGL" );
glutReshapeFunc( reshape );
glutDisplayFunc( display );
glutKeyboardFunc( keyboard );
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
vec4 blue = {{0,0,1,1}};
vec4 black = {{0,0,0,1}};
texture_atlas_t * atlas = texture_atlas_new( 512, 512, 1);
texture_font_t * big = texture_font_new_from_file( atlas, 400, "fonts/Vera.ttf");
texture_font_t * small = texture_font_new_from_file( atlas, 18, "fonts/Vera.ttf");
texture_font_t * title = texture_font_new_from_file( atlas, 32, "fonts/Vera.ttf");
text_buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
line_buffer = vertex_buffer_new( "vertex:3f,color:4f" );
point_buffer = vertex_buffer_new( "vertex:3f,color:4f" );
vec2 pen, origin;
texture_glyph_t *glyph = texture_font_get_glyph( big, L'g' );
origin.x = width/2 - glyph->offset_x - glyph->width/2;
origin.y = height/2 - glyph->offset_y + glyph->height/2;
add_text( text_buffer, big, L"g", &black, &origin );
// title
pen.x = 50;
pen.y = 560;
add_text( text_buffer, title, L"Glyph metrics", &black, &pen );
point_t vertices[] =
{ // Baseline
{0.1*width, origin.y, 0, black},
{0.9*width, origin.y, 0, black},
// Top line
{0.1*width, origin.y + glyph->offset_y, 0, black},
{0.9*width, origin.y + glyph->offset_y, 0, black},
// Bottom line
{0.1*width, origin.y + glyph->offset_y - glyph->height, 0, black},
{0.9*width, origin.y + glyph->offset_y - glyph->height, 0, black},
// Left line at origin
{width/2-glyph->offset_x-glyph->width/2, 0.1*height, 0, black},
{width/2-glyph->offset_x-glyph->width/2, 0.9*height, 0, black},
// Left line
{width/2 - glyph->width/2, .3*height, 0, black},
{width/2 - glyph->width/2, .9*height, 0, black},
// Right line
{width/2 + glyph->width/2, .3*height, 0, black},
{width/2 + glyph->width/2, .9*height, 0, black},
// Right line at origin
{width/2-glyph->offset_x-glyph->width/2+glyph->advance_x, 0.1*height, 0, black},
{width/2-glyph->offset_x-glyph->width/2+glyph->advance_x, 0.7*height, 0, black},
// Width
{width/2 - glyph->width/2, 0.8*height, 0, blue},
{width/2 + glyph->width/2, 0.8*height, 0, blue},
// Advance_x
{width/2-glyph->width/2-glyph->offset_x, 0.2*height, 0, blue},
{width/2-glyph->width/2-glyph->offset_x+glyph->advance_x, 0.2*height, 0, blue},
// Offset_x
{width/2-glyph->width/2-glyph->offset_x, 0.85*height, 0, blue},
{width/2-glyph->width/2, 0.85*height, 0, blue},
// Height
{0.3*width/2, origin.y + glyph->offset_y - glyph->height, 0, blue},
{0.3*width/2, origin.y + glyph->offset_y, 0, blue},
// Offset y
{0.8*width, origin.y + glyph->offset_y, 0, blue},
{0.8*width, origin.y , 0, blue},
};
GLuint indices [] = { 0, 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};
vertex_buffer_push_back( line_buffer, vertices, 26, indices, 26 );
pen.x = width/2 - 48;
pen.y = .2*height - 18;
add_text( text_buffer, small, L"advance_x", &blue, &pen );
pen.x = width/2 - 20;
pen.y = .8*height + 3;
add_text( text_buffer, small, L"width", &blue, &pen );
pen.x = width/2 - glyph->width/2 + 5;
pen.y = .85*height-8;
add_text( text_buffer, small, L"offset_x", &blue, &pen );
pen.x = 0.2*width/2-30;
pen.y = origin.y + glyph->offset_y - glyph->height/2;
add_text( text_buffer, small, L"height", &blue, &pen );
pen.x = 0.8*width+3;
pen.y = origin.y + glyph->offset_y/2 -6;
add_text( text_buffer, small, L"offset_y", &blue, &pen );
pen.x = width/2 - glyph->offset_x - glyph->width/2 - 58;
pen.y = height/2 - glyph->offset_y + glyph->height/2 - 20;
add_text( text_buffer, small, L"Origin", &black, &pen );
GLuint i = 0;
point_t p;
p.color = black;
// Origin point
p.x = width/2 - glyph->offset_x - glyph->width/2;
p.y = height/2 - glyph->offset_y + glyph->height/2;
vertex_buffer_push_back( point_buffer, &p, 1, &i, 1 );
// Advance point
p.x = width/2 - glyph->offset_x - glyph->width/2 + glyph->advance_x;
p.y = height/2 - glyph->offset_y + glyph->height/2;
vertex_buffer_push_back( point_buffer, &p, 1, &i, 1 );
text_shader = shader_load( "shaders/v3f-t2f-c4f.vert",
"shaders/v3f-t2f-c4f.frag" );
shader = shader_load( "shaders/v3f-c4f.vert",
"shaders/v3f-c4f.frag" );
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
glutMainLoop( );
return 0;
}
// ------------------------------------------------------------ console_new ---
console_t *
console_new( void )
{
console_t *self = (console_t *) malloc( sizeof(console_t) );
if( !self )
{
return self;
}
self->lines = vector_new( sizeof(wchar_t *) );
self->prompt = (wchar_t *) wcsdup( L">>> " );
self->cursor = 0;
self->buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
self->input[0] = L'\0';
self->killring[0] = L'\0';
self->handlers[__SIGNAL_ACTIVATE__] = 0;
self->handlers[__SIGNAL_COMPLETE__] = 0;
self->handlers[__SIGNAL_HISTORY_NEXT__] = 0;
self->handlers[__SIGNAL_HISTORY_PREV__] = 0;
self->pen.x = self->pen.y = 0;
texture_atlas_t * atlas = texture_atlas_new( 512, 512, 1 );
vec4 white = {{1,1,1,1}};
vec4 black = {{0,0,0,1}};
vec4 none = {{0,0,1,0}};
markup_t normal;
normal.family = "fonts/VeraMono.ttf";
normal.size = 13.0;
normal.bold = 0;
normal.italic = 0;
normal.rise = 0.0;
normal.spacing = 0.0;
normal.gamma = 1.0;
normal.foreground_color = black;
normal.background_color = none;
normal.underline = 0;
normal.underline_color = white;
normal.overline = 0;
normal.overline_color = white;
normal.strikethrough = 0;
normal.strikethrough_color = white;
normal.font = texture_font_new_from_file( atlas, 13, "fonts/VeraMono.ttf" );
markup_t bold = normal;
bold.bold = 1;
bold.font = texture_font_new_from_file( atlas, 13, "fonts/VeraMoBd.ttf" );
markup_t italic = normal;
italic.italic = 1;
bold.font = texture_font_new_from_file( atlas, 13, "fonts/VeraMoIt.ttf" );
markup_t bold_italic = normal;
bold.bold = 1;
italic.italic = 1;
italic.font = texture_font_new_from_file( atlas, 13, "fonts/VeraMoBI.ttf" );
markup_t faint = normal;
faint.foreground_color.r = 0.35;
faint.foreground_color.g = 0.35;
faint.foreground_color.b = 0.35;
markup_t error = normal;
error.foreground_color.r = 1.00;
error.foreground_color.g = 0.00;
error.foreground_color.b = 0.00;
markup_t warning = normal;
warning.foreground_color.r = 1.00;
warning.foreground_color.g = 0.50;
warning.foreground_color.b = 0.50;
markup_t output = normal;
output.foreground_color.r = 0.00;
output.foreground_color.g = 0.00;
output.foreground_color.b = 1.00;
self->markup[MARKUP_NORMAL] = normal;
self->markup[MARKUP_ERROR] = error;
self->markup[MARKUP_WARNING] = warning;
self->markup[MARKUP_OUTPUT] = output;
self->markup[MARKUP_FAINT] = faint;
self->markup[MARKUP_BOLD] = bold;
self->markup[MARKUP_ITALIC] = italic;
self->markup[MARKUP_BOLD_ITALIC] = bold_italic;
return self;
}
// ------------------------------------------------------------------- init ---
void init( void )
{
vec4 blue = {{0,0,1,1}};
vec4 black = {{0,0,0,1}};
texture_atlas_t * atlas = texture_atlas_new( 512, 512, 1);
texture_font_t * big = texture_font_new_from_file( atlas, 400, "fonts/Vera.ttf");
texture_font_t * small = texture_font_new_from_file( atlas, 18, "fonts/Vera.ttf");
texture_font_t * title = texture_font_new_from_file( atlas, 32, "fonts/Vera.ttf");
text_buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
line_buffer = vertex_buffer_new( "vertex:3f,color:4f" );
point_buffer = vertex_buffer_new( "vertex:3f,color:4f" );
vec2 pen, origin;
texture_glyph_t *glyph = texture_font_get_glyph( big, "g" );
origin.x = width/2 - glyph->offset_x - glyph->width/2;
origin.y = height/2 - glyph->offset_y + glyph->height/2;
add_text( text_buffer, big, "g", &black, &origin );
// title
pen.x = 50;
pen.y = 560;
add_text( text_buffer, title, "Glyph metrics", &black, &pen );
point_t vertices[] =
{ // Baseline
{0.1*width, origin.y, 0, black},
{0.9*width, origin.y, 0, black},
// Top line
{0.1*width, origin.y + glyph->offset_y, 0, black},
{0.9*width, origin.y + glyph->offset_y, 0, black},
// Bottom line
{0.1*width, origin.y + glyph->offset_y - glyph->height, 0, black},
{0.9*width, origin.y + glyph->offset_y - glyph->height, 0, black},
// Left line at origin
{width/2-glyph->offset_x-glyph->width/2, 0.1*height, 0, black},
{width/2-glyph->offset_x-glyph->width/2, 0.9*height, 0, black},
// Left line
{width/2 - glyph->width/2, .3*height, 0, black},
{width/2 - glyph->width/2, .9*height, 0, black},
// Right line
{width/2 + glyph->width/2, .3*height, 0, black},
{width/2 + glyph->width/2, .9*height, 0, black},
// Right line at origin
{width/2-glyph->offset_x-glyph->width/2+glyph->advance_x, 0.1*height, 0, black},
{width/2-glyph->offset_x-glyph->width/2+glyph->advance_x, 0.7*height, 0, black},
// Width
{width/2 - glyph->width/2, 0.8*height, 0, blue},
{width/2 + glyph->width/2, 0.8*height, 0, blue},
// Advance_x
{width/2-glyph->width/2-glyph->offset_x, 0.2*height, 0, blue},
{width/2-glyph->width/2-glyph->offset_x+glyph->advance_x, 0.2*height, 0, blue},
// Offset_x
{width/2-glyph->width/2-glyph->offset_x, 0.85*height, 0, blue},
{width/2-glyph->width/2, 0.85*height, 0, blue},
// Height
{0.3*width/2, origin.y + glyph->offset_y - glyph->height, 0, blue},
{0.3*width/2, origin.y + glyph->offset_y, 0, blue},
// Offset y
{0.8*width, origin.y + glyph->offset_y, 0, blue},
{0.8*width, origin.y , 0, blue},
};
GLuint indices [] = { 0, 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};
vertex_buffer_push_back( line_buffer, vertices, 26, indices, 26 );
pen.x = width/2 - 48;
pen.y = .2*height - 18;
add_text( text_buffer, small, "advance_x", &blue, &pen );
pen.x = width/2 - 20;
pen.y = .8*height + 3;
add_text( text_buffer, small, "width", &blue, &pen );
pen.x = width/2 - glyph->width/2 + 5;
pen.y = .85*height-8;
add_text( text_buffer, small, "offset_x", &blue, &pen );
pen.x = 0.2*width/2-30;
pen.y = origin.y + glyph->offset_y - glyph->height/2;
add_text( text_buffer, small, "height", &blue, &pen );
pen.x = 0.8*width+3;
pen.y = origin.y + glyph->offset_y/2 -6;
add_text( text_buffer, small, "offset_y", &blue, &pen );
pen.x = width/2 - glyph->offset_x - glyph->width/2 - 58;
pen.y = height/2 - glyph->offset_y + glyph->height/2 - 20;
add_text( text_buffer, small, "Origin", &black, &pen );
GLuint i = 0;
point_t p;
p.color = black;
// Origin point
p.x = width/2 - glyph->offset_x - glyph->width/2;
p.y = height/2 - glyph->offset_y + glyph->height/2;
vertex_buffer_push_back( point_buffer, &p, 1, &i, 1 );
// Advance point
p.x = width/2 - glyph->offset_x - glyph->width/2 + glyph->advance_x;
p.y = height/2 - glyph->offset_y + glyph->height/2;
vertex_buffer_push_back( point_buffer, &p, 1, &i, 1 );
text_shader = shader_load( "shaders/v3f-t2f-c4f.vert",
"shaders/v3f-t2f-c4f.frag" );
shader = shader_load( "shaders/v3f-c4f.vert",
"shaders/v3f-c4f.frag" );
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
// ------------------------------------------------------------------- main ---
int main( int argc, char **argv )
{
size_t i, j;
GLFWwindow* window;
glfwSetErrorCallback( error_callback );
if (!glfwInit( ))
{
exit( EXIT_FAILURE );
}
glfwWindowHint( GLFW_VISIBLE, GL_TRUE );
glfwWindowHint( GLFW_RESIZABLE, GL_FALSE );
window = glfwCreateWindow( 1, 1, argv[0], NULL, NULL );
if (!window)
{
glfwTerminate( );
exit( EXIT_FAILURE );
}
glfwMakeContextCurrent( window );
glfwSwapInterval( 1 );
glfwSetFramebufferSizeCallback( window, reshape );
glfwSetWindowRefreshCallback( window, display );
glfwSetKeyCallback( window, keyboard );
#ifndef __APPLE__
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
#endif
texture_atlas_t * atlas = texture_atlas_new( 512, 512, 3 );
texture_font_t *fonts[20];
for ( i=0; i< 20; ++i )
{
fonts[i] = texture_font_new_from_file(atlas, 12+i, font_filename),
texture_font_load_glyphs(fonts[i], text, direction, language, script );
}
typedef struct { float x,y,z, u,v, r,g,b,a, shift, gamma; } vertex_t;
vbuffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,"
"color:4f,ashift:1f,agamma:1f" );
/* Create a buffer for harfbuzz to use */
hb_buffer_t *buffer = hb_buffer_create();
for (i=0; i < 20; ++i)
{
hb_buffer_set_direction( buffer, direction );
hb_buffer_set_script( buffer, script );
hb_buffer_set_language( buffer,
hb_language_from_string(language, strlen(language)) );
hb_buffer_add_utf8( buffer, text, strlen(text), 0, strlen(text) );
hb_shape( fonts[i]->hb_ft_font, buffer, NULL, 0 );
unsigned int glyph_count;
hb_glyph_info_t *glyph_info =
hb_buffer_get_glyph_infos(buffer, &glyph_count);
hb_glyph_position_t *glyph_pos =
hb_buffer_get_glyph_positions(buffer, &glyph_count);
texture_font_load_glyphs( fonts[i], text,
direction, language, script );
float gamma = 1.0;
float shift = 0.0;
float x = 0;
float y = 600 - i * (10+i) - 15;
float width = 0.0;
float hres = fonts[i]->hres;
for (j = 0; j < glyph_count; ++j)
{
int codepoint = glyph_info[j].codepoint;
float x_advance = glyph_pos[j].x_advance/(float)(hres*64);
float x_offset = glyph_pos[j].x_offset/(float)(hres*64);
texture_glyph_t *glyph = texture_font_get_glyph(fonts[i], codepoint);
if( i < (glyph_count-1) )
width += x_advance + x_offset;
else
width += glyph->offset_x + glyph->width;
}
x = 800 - width - 10 ;
for (j = 0; j < glyph_count; ++j)
{
int codepoint = glyph_info[j].codepoint;
// because of vhinting trick we need the extra 64 (hres)
float x_advance = glyph_pos[j].x_advance/(float)(hres*64);
float x_offset = glyph_pos[j].x_offset/(float)(hres*64);
float y_advance = glyph_pos[j].y_advance/(float)(64);
float y_offset = glyph_pos[j].y_offset/(float)(64);
texture_glyph_t *glyph = texture_font_get_glyph(fonts[i], codepoint);
float r = 0.0;
float g = 0.0;
float b = 0.0;
float a = 1.0;
float x0 = x + x_offset + glyph->offset_x;
float x1 = x0 + glyph->width;
float y0 = floor(y + y_offset + glyph->offset_y);
float y1 = floor(y0 - glyph->height);
float s0 = glyph->s0;
float t0 = glyph->t0;
float s1 = glyph->s1;
float t1 = glyph->t1;
vertex_t vertices[4] = {
{x0,y0,0, s0,t0, r,g,b,a, shift, gamma},
{x0,y1,0, s0,t1, r,g,b,a, shift, gamma},
{x1,y1,0, s1,t1, r,g,b,a, shift, gamma},
{x1,y0,0, s1,t0, r,g,b,a, shift, gamma} };
GLushort indices[6] = { 0,1,2, 0,2,3 };
vertex_buffer_push_back( vbuffer, vertices, 4, indices, 6 );
x += x_advance;
y += y_advance;
}
/* clean up the buffer, but don't kill it just yet */
hb_buffer_reset(buffer);
}
glClearColor(1,1,1,1);
glEnable( GL_BLEND );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
glBindTexture( GL_TEXTURE_2D, atlas->id );
texture_atlas_upload( atlas );
vertex_buffer_upload( vbuffer );
shader = shader_load("shaders/text.vert", "shaders/text.frag");
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
glfwSetWindowSize( window, 800, 600 );
glfwShowWindow( window );
while(!glfwWindowShouldClose( window ))
{
display( window );
glfwPollEvents( );
}
glfwDestroyWindow( window );
glfwTerminate( );
return 0;
}
// ------------------------------------------------------------------- main ---
int main( int argc, char **argv )
{
FILE* test;
size_t i, j;
int arg;
char * font_cache =
" !\"#$%&'()*+,-./0123456789:;<=>?"
"@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"
"`abcdefghijklmnopqrstuvwxyz{|}~";
float font_size = 0.0;
const char * font_filename = NULL;
const char * header_filename = NULL;
const char * variable_name = "font";
int show_help = 0;
size_t texture_width = 128;
for ( arg = 1; arg < argc; ++arg )
{
if ( 0 == strcmp( "--font", argv[arg] ) || 0 == strcmp( "-f", argv[arg] ) )
{
++arg;
if ( font_filename )
{
fprintf( stderr, "Multiple --font parameters.\n" );
print_help();
exit( 1 );
}
if ( arg >= argc )
{
fprintf( stderr, "No font file given.\n" );
print_help();
exit( 1 );
}
font_filename = argv[arg];
continue;
}
if ( 0 == strcmp( "--header", argv[arg] ) || 0 == strcmp( "-o", argv[arg] ) )
{
++arg;
if ( header_filename )
{
fprintf( stderr, "Multiple --header parameters.\n" );
print_help();
exit( 1 );
}
if ( arg >= argc )
{
fprintf( stderr, "No header file given.\n" );
print_help();
exit( 1 );
}
header_filename = argv[arg];
continue;
}
if ( 0 == strcmp( "--help", argv[arg] ) || 0 == strcmp( "-h", argv[arg] ) )
{
show_help = 1;
break;
}
if ( 0 == strcmp( "--size", argv[arg] ) || 0 == strcmp( "-s", argv[arg] ) )
{
++arg;
if ( 0.0 != font_size )
{
fprintf( stderr, "Multiple --size parameters.\n" );
print_help();
exit( 1 );
}
if ( arg >= argc )
{
fprintf( stderr, "No font size given.\n" );
print_help();
exit( 1 );
}
errno = 0;
font_size = atof( argv[arg] );
if ( errno )
{
fprintf( stderr, "No valid font size given.\n" );
print_help();
exit( 1 );
}
continue;
}
if ( 0 == strcmp( "--variable", argv[arg] ) || 0 == strcmp( "-arg", argv[arg] ) )
{
++arg;
if ( 0 != strcmp( "font", variable_name ) )
{
fprintf( stderr, "Multiple --variable parameters.\n" );
print_help();
exit( 1 );
}
if ( arg >= argc )
{
fprintf( stderr, "No variable name given.\n" );
print_help();
exit( 1 );
}
variable_name = argv[arg];
continue;
}
if ( 0 == strcmp( "--texture", argv[arg] ) || 0 == strcmp( "-t", argv[arg] ) )
{
++arg;
if ( 128.0 != texture_width )
{
fprintf( stderr, "Multiple --texture parameters.\n" );
print_help();
exit( 1 );
}
if ( arg >= argc )
{
fprintf( stderr, "No texture size given.\n" );
print_help();
exit( 1 );
}
errno = 0;
texture_width = atof( argv[arg] );
if ( errno )
{
fprintf( stderr, "No valid texture size given.\n" );
print_help();
exit( 1 );
}
continue;
}
fprintf( stderr, "Unknown parameter %s\n", argv[arg] );
print_help();
exit( 1 );
}
if ( show_help )
{
print_help();
exit( 1 );
}
if ( !font_filename )
{
fprintf( stderr, "No font file given.\n" );
print_help();
exit( 1 );
}
if ( !( test = fopen( font_filename, "r" ) ) )
{
fprintf( stderr, "Font file \"%s\" does not exist.\n", font_filename );
}
fclose( test );
if ( 4.0 > font_size )
{
fprintf( stderr, "Font size too small, expected at least 4 pt.\n" );
print_help();
exit( 1 );
}
if ( !header_filename )
{
fprintf( stderr, "No header file given.\n" );
print_help();
exit( 1 );
}
texture_atlas_t * atlas = texture_atlas_new( texture_width, texture_width, 1 );
texture_font_t * font = texture_font_new_from_file( atlas, font_size, font_filename );
size_t missed = texture_font_load_glyphs( font, font_cache );
printf( "Font filename : %s\n"
"Font size : %.1f\n"
"Number of glyphs : %ld\n"
"Number of missed glyphs : %ld\n"
"Texture size : %ldx%ldx%ld\n"
"Texture occupancy : %.2f%%\n"
"\n"
"Header filename : %s\n"
"Variable name : %s\n",
font_filename,
font_size,
strlen(font_cache),
missed,
atlas->width, atlas->height, atlas->depth,
100.0 * atlas->used / (float)(atlas->width * atlas->height),
header_filename,
variable_name );
size_t texture_size = atlas->width * atlas->height *atlas->depth;
size_t glyph_count = font->glyphs->size;
size_t max_kerning_count = 1;
for( i=0; i < glyph_count; ++i )
{
texture_glyph_t *glyph = *(texture_glyph_t **) vector_get( font->glyphs, i );
if( vector_size(glyph->kerning) > max_kerning_count )
{
max_kerning_count = vector_size(glyph->kerning);
}
}
FILE *file = fopen( header_filename, "w" );
// -------------
// Header
// -------------
fprintf( file,
"/* ============================================================================\n"
" * Freetype GL - A C OpenGL Freetype engine\n"
" * Platform: Any\n"
" * WWW: https://github.com/rougier/freetype-gl\n"
" * ----------------------------------------------------------------------------\n"
" * Copyright 2011,2012 Nicolas P. Rougier. All rights reserved.\n"
" *\n"
" * Redistribution and use in source and binary forms, with or without\n"
" * modification, are permitted provided that the following conditions are met:\n"
" *\n"
" * 1. Redistributions of source code must retain the above copyright notice,\n"
" * this list of conditions and the following disclaimer.\n"
" *\n"
" * 2. Redistributions in binary form must reproduce the above copyright\n"
" * notice, this list of conditions and the following disclaimer in the\n"
" * documentation and/or other materials provided with the distribution.\n"
" *\n"
" * THIS SOFTWARE IS PROVIDED BY NICOLAS P. ROUGIER ''AS IS'' AND ANY EXPRESS OR\n"
" * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF\n"
" * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO\n"
" * EVENT SHALL NICOLAS P. ROUGIER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,\n"
" * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n"
" * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n"
" * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\n"
" * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
" * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\n"
" * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
" *\n"
" * The views and conclusions contained in the software and documentation are\n"
" * those of the authors and should not be interpreted as representing official\n"
" * policies, either expressed or implied, of Nicolas P. Rougier.\n"
" * ============================================================================\n"
" */\n");
// ----------------------
// Structure declarations
// ----------------------
fprintf( file,
"#include <stddef.h>\n"
"#include <stdint.h>\n"
"#ifdef __cplusplus\n"
"extern \"C\" {\n"
"#endif\n"
"\n"
"typedef struct\n"
"{\n"
" uint32_t codepoint;\n"
" float kerning;\n"
"} kerning_t;\n\n" );
fprintf( file,
"typedef struct\n"
"{\n"
" uint32_t codepoint;\n"
" int width, height;\n"
" int offset_x, offset_y;\n"
" float advance_x, advance_y;\n"
" float s0, t0, s1, t1;\n"
" size_t kerning_count;\n"
" kerning_t kerning[%zu];\n"
"} texture_glyph_t;\n\n", max_kerning_count );
fprintf( file,
"typedef struct\n"
"{\n"
" size_t tex_width;\n"
" size_t tex_height;\n"
" size_t tex_depth;\n"
" char tex_data[%zu];\n"
" float size;\n"
" float height;\n"
" float linegap;\n"
" float ascender;\n"
" float descender;\n"
" size_t glyphs_count;\n"
" texture_glyph_t glyphs[%zu];\n"
"} texture_font_t;\n\n", texture_size, glyph_count );
fprintf( file, "texture_font_t %s = {\n", variable_name );
// ------------
// Texture data
// ------------
fprintf( file, " %zu, %zu, %zu, \n", atlas->width, atlas->height, atlas->depth );
fprintf( file, " {" );
for( i=0; i < texture_size; i+= 32 )
{
for( j=0; j < 32 && (j+i) < texture_size ; ++ j)
{
if( (j+i) < (texture_size-1) )
{
fprintf( file, "%d,", atlas->data[i+j] );
}
else
{
fprintf( file, "%d", atlas->data[i+j] );
}
}
if( (j+i) < texture_size )
{
fprintf( file, "\n " );
}
}
fprintf( file, "}, \n" );
// -------------------
// Texture information
// -------------------
fprintf( file, " %ff, %ff, %ff, %ff, %ff, %zu, \n",
font->size, font->height,
font->linegap,font->ascender, font->descender,
glyph_count );
// --------------
// Texture glyphs
// --------------
fprintf( file, " {\n" );
for( i=0; i < glyph_count; ++i )
{
texture_glyph_t * glyph = *(texture_glyph_t **) vector_get( font->glyphs, i );
/*
// Debugging information
printf( "glyph : '%lc'\n",
glyph->codepoint );
printf( " size : %dx%d\n",
glyph->width, glyph->height );
printf( " offset : %+d%+d\n",
glyph->offset_x, glyph->offset_y );
printf( " advance : %ff, %ff\n",
glyph->advance_x, glyph->advance_y );
printf( " tex coords.: %ff, %ff, %ff, %ff\n",
glyph->u0, glyph->v0, glyph->u1, glyph->v1 );
printf( " kerning : " );
if( glyph->kerning_count )
{
for( j=0; j < glyph->kerning_count; ++j )
{
printf( "('%lc', %ff)",
glyph->kerning[j].codepoint, glyph->kerning[j].kerning );
if( j < (glyph->kerning_count-1) )
{
printf( ", " );
}
}
}
else
{
printf( "None" );
}
printf( "\n\n" );
*/
// TextureFont
fprintf( file, " {%u, ", glyph->codepoint );
fprintf( file, "%zu, %zu, ", glyph->width, glyph->height );
fprintf( file, "%d, %d, ", glyph->offset_x, glyph->offset_y );
fprintf( file, "%ff, %ff, ", glyph->advance_x, glyph->advance_y );
fprintf( file, "%ff, %ff, %ff, %ff, ", glyph->s0, glyph->t0, glyph->s1, glyph->t1 );
fprintf( file, "%zu, ", vector_size(glyph->kerning) );
if (vector_size(glyph->kerning) == 0) {
fprintf( file, "0" );
}
else {
fprintf( file, "{ " );
for( j=0; j < vector_size(glyph->kerning); ++j )
{
kerning_t *kerning = (kerning_t *) vector_get( glyph->kerning, j);
fprintf( file, "{%u, %ff}", kerning->codepoint, kerning->kerning );
if( j < (vector_size(glyph->kerning)-1))
{
fprintf( file, ", " );
}
}
fprintf( file, "}" );
}
fprintf( file, " },\n" );
}
fprintf( file, " }\n};\n" );
fprintf( file,
"#ifdef __cplusplus\n"
"}\n"
"#endif\n" );
return 0;
}
// ------------------------------------------------------------------- main ---
int main( int argc, char **argv )
{
glutInit( &argc, argv );
glutInitWindowSize( 512, 512 );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );
glutCreateWindow( argv[0] );
glutReshapeFunc( reshape );
glutDisplayFunc( display );
glutKeyboardFunc( keyboard );
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
texture_atlas_t * atlas = texture_atlas_new( 512, 512, 1 );
const char *filename = "fonts/Vera.ttf";
const wchar_t *cache = L" !\"#$%&'()*+,-./0123456789:;<=>?"
L"@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"
L"`abcdefghijklmnopqrstuvwxyz{|}~";
size_t minsize = 8, maxsize = 27;
size_t count = maxsize - minsize;
size_t i, missed = 0;
for( i=minsize; i < maxsize; ++i )
{
texture_font_t * font = texture_font_new_from_file( atlas, i, filename );
missed += texture_font_load_glyphs( font, cache );
texture_font_delete( font );
}
printf( "Matched font : %s\n", filename );
printf( "Number of fonts : %ld\n", count );
printf( "Number of glyphs per font : %ld\n", wcslen(cache) );
printf( "Number of missed glyphs : %ld\n", missed );
printf( "Total number of glyphs : %ld/%ld\n",
wcslen(cache)*count - missed, wcslen(cache)*count );
printf( "Texture size : %ldx%ld\n", atlas->width, atlas->height );
printf( "Texture occupancy : %.2f%%\n",
100.0*atlas->used/(float)(atlas->width*atlas->height) );
glClearColor(1,1,1,1);
glEnable( GL_BLEND );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
glEnable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, atlas->id );
typedef struct {
float x,y,z, u,v, r,g,b,a;
} vertex_t;
vertex_t vertices[4] = {
{ 0, 0, 0, 0,1, 0,0,0,1},
{ 0,512,0, 0,0, 0,0,0,1},
{512,512,0, 1,0, 0,0,0,1},
{512, 0,0, 1,1, 0,0,0,1}
};
GLuint indices[6] = { 0, 1, 2, 0,2,3 };
buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
vertex_buffer_push_back( buffer, vertices, 4, indices, 6 );
shader = shader_load("shaders/v3f-t2f-c4f.vert",
"shaders/v3f-t2f-c4f.frag");
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
glutMainLoop( );
return 0;
}
// ------------------------------------------------------------------- main ---
int main( int argc, char **argv )
{
int width = 600;
int height = 600;
GLFWwindow* window;
glfwSetErrorCallback( error_callback );
if (!glfwInit( ))
{
exit( EXIT_FAILURE );
}
glfwWindowHint( GLFW_VISIBLE, GL_TRUE );
glfwWindowHint( GLFW_RESIZABLE, GL_FALSE );
window = glfwCreateWindow( 1, 1, "Freetype OpenGL", NULL, NULL );
if (!window)
{
glfwTerminate( );
exit( EXIT_FAILURE );
}
glfwMakeContextCurrent( window );
glfwSwapInterval( 1 );
glfwSetFramebufferSizeCallback( window, reshape );
glfwSetWindowRefreshCallback( window, display );
glfwSetKeyCallback( window, keyboard );
#ifndef __APPLE__
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf( stderr, "Error: %s\n", glewGetErrorString(err) );
exit( EXIT_FAILURE );
}
fprintf( stderr, "Using GLEW %s\n", glewGetString(GLEW_VERSION) );
#endif
vec4 blue = {{0,0,1,1}};
vec4 black = {{0,0,0,1}};
texture_atlas_t * atlas = texture_atlas_new( 512, 512, 1);
texture_font_t * big = texture_font_new_from_file( atlas, 400, "fonts/Vera.ttf");
texture_font_t * small = texture_font_new_from_file( atlas, 18, "fonts/Vera.ttf");
texture_font_t * title = texture_font_new_from_file( atlas, 32, "fonts/Vera.ttf");
text_buffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,color:4f" );
line_buffer = vertex_buffer_new( "vertex:3f,color:4f" );
point_buffer = vertex_buffer_new( "vertex:3f,color:4f" );
vec2 pen, origin;
texture_glyph_t *glyph = texture_font_get_glyph( big, L'g' );
origin.x = width/2 - glyph->offset_x - glyph->width/2;
origin.y = height/2 - glyph->offset_y + glyph->height/2;
add_text( text_buffer, big, L"g", &black, &origin );
// title
pen.x = 50;
pen.y = 560;
add_text( text_buffer, title, L"Glyph metrics", &black, &pen );
point_t vertices[] =
{ // Baseline
{0.1*width, origin.y, 0, black},
{0.9*width, origin.y, 0, black},
// Top line
{0.1*width, origin.y + glyph->offset_y, 0, black},
{0.9*width, origin.y + glyph->offset_y, 0, black},
// Bottom line
{0.1*width, origin.y + glyph->offset_y - glyph->height, 0, black},
{0.9*width, origin.y + glyph->offset_y - glyph->height, 0, black},
// Left line at origin
{width/2-glyph->offset_x-glyph->width/2, 0.1*height, 0, black},
{width/2-glyph->offset_x-glyph->width/2, 0.9*height, 0, black},
// Left line
{width/2 - glyph->width/2, .3*height, 0, black},
{width/2 - glyph->width/2, .9*height, 0, black},
// Right line
{width/2 + glyph->width/2, .3*height, 0, black},
{width/2 + glyph->width/2, .9*height, 0, black},
// Right line at origin
{width/2-glyph->offset_x-glyph->width/2+glyph->advance_x, 0.1*height, 0, black},
{width/2-glyph->offset_x-glyph->width/2+glyph->advance_x, 0.7*height, 0, black},
// Width
{width/2 - glyph->width/2, 0.8*height, 0, blue},
{width/2 + glyph->width/2, 0.8*height, 0, blue},
// Advance_x
{width/2-glyph->width/2-glyph->offset_x, 0.2*height, 0, blue},
{width/2-glyph->width/2-glyph->offset_x+glyph->advance_x, 0.2*height, 0, blue},
// Offset_x
{width/2-glyph->width/2-glyph->offset_x, 0.85*height, 0, blue},
{width/2-glyph->width/2, 0.85*height, 0, blue},
// Height
{0.3*width/2, origin.y + glyph->offset_y - glyph->height, 0, blue},
{0.3*width/2, origin.y + glyph->offset_y, 0, blue},
// Offset y
{0.8*width, origin.y + glyph->offset_y, 0, blue},
{0.8*width, origin.y , 0, blue},
};
GLuint indices [] = { 0, 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};
vertex_buffer_push_back( line_buffer, vertices, 26, indices, 26 );
pen.x = width/2 - 48;
pen.y = .2*height - 18;
add_text( text_buffer, small, L"advance_x", &blue, &pen );
pen.x = width/2 - 20;
pen.y = .8*height + 3;
add_text( text_buffer, small, L"width", &blue, &pen );
pen.x = width/2 - glyph->width/2 + 5;
pen.y = .85*height-8;
add_text( text_buffer, small, L"offset_x", &blue, &pen );
pen.x = 0.2*width/2-30;
pen.y = origin.y + glyph->offset_y - glyph->height/2;
add_text( text_buffer, small, L"height", &blue, &pen );
pen.x = 0.8*width+3;
pen.y = origin.y + glyph->offset_y/2 -6;
add_text( text_buffer, small, L"offset_y", &blue, &pen );
pen.x = width/2 - glyph->offset_x - glyph->width/2 - 58;
pen.y = height/2 - glyph->offset_y + glyph->height/2 - 20;
add_text( text_buffer, small, L"Origin", &black, &pen );
GLuint i = 0;
point_t p;
p.color = black;
// Origin point
p.x = width/2 - glyph->offset_x - glyph->width/2;
p.y = height/2 - glyph->offset_y + glyph->height/2;
vertex_buffer_push_back( point_buffer, &p, 1, &i, 1 );
// Advance point
p.x = width/2 - glyph->offset_x - glyph->width/2 + glyph->advance_x;
p.y = height/2 - glyph->offset_y + glyph->height/2;
vertex_buffer_push_back( point_buffer, &p, 1, &i, 1 );
text_shader = shader_load( "shaders/v3f-t2f-c4f.vert",
"shaders/v3f-t2f-c4f.frag" );
shader = shader_load( "shaders/v3f-c4f.vert",
"shaders/v3f-c4f.frag" );
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
glfwSetWindowSize( window, width, height );
glfwShowWindow( window );
while(!glfwWindowShouldClose( window ))
{
display( window );
glfwPollEvents( );
}
glfwDestroyWindow( window );
glfwTerminate( );
return 0;
}
// ------------------------------------------------------------------- init ---
void init( void )
{
size_t i, j;
texture_atlas_t * atlas = texture_atlas_new( 512, 512, 3 );
texture_font_t *fonts[20];
for ( i=0; i< 20; ++i )
{
fonts[i] = texture_font_new_from_file(atlas, 12+i, font_filename),
texture_font_load_glyphs(fonts[i], text, direction, language, script );
}
typedef struct { float x,y,z, u,v, r,g,b,a, shift, gamma; } vertex_t;
vbuffer = vertex_buffer_new( "vertex:3f,tex_coord:2f,"
"color:4f,ashift:1f,agamma:1f" );
/* Create a buffer for harfbuzz to use */
hb_buffer_t *buffer = hb_buffer_create();
for (i=0; i < 20; ++i)
{
hb_buffer_set_direction( buffer, direction );
hb_buffer_set_script( buffer, script );
hb_buffer_set_language( buffer,
hb_language_from_string(language, strlen(language)) );
hb_buffer_add_utf8( buffer, text, strlen(text), 0, strlen(text) );
hb_shape( fonts[i]->hb_ft_font, buffer, NULL, 0 );
unsigned int glyph_count;
hb_glyph_info_t *glyph_info =
hb_buffer_get_glyph_infos(buffer, &glyph_count);
hb_glyph_position_t *glyph_pos =
hb_buffer_get_glyph_positions(buffer, &glyph_count);
texture_font_load_glyphs( fonts[i], text,
direction, language, script );
float gamma = 1.0;
float shift = 0.0;
float x = 0;
float y = 600 - i * (10+i) - 15;
float width = 0.0;
float hres = fonts[i]->hres;
for (j = 0; j < glyph_count; ++j)
{
int codepoint = glyph_info[j].codepoint;
float x_advance = glyph_pos[j].x_advance/(float)(hres*64);
float x_offset = glyph_pos[j].x_offset/(float)(hres*64);
texture_glyph_t *glyph = texture_font_get_glyph(fonts[i], codepoint);
if( i < (glyph_count-1) )
width += x_advance + x_offset;
else
width += glyph->offset_x + glyph->width;
}
x = 800 - width - 10 ;
for (j = 0; j < glyph_count; ++j)
{
int codepoint = glyph_info[j].codepoint;
// because of vhinting trick we need the extra 64 (hres)
float x_advance = glyph_pos[j].x_advance/(float)(hres*64);
float x_offset = glyph_pos[j].x_offset/(float)(hres*64);
float y_advance = glyph_pos[j].y_advance/(float)(64);
float y_offset = glyph_pos[j].y_offset/(float)(64);
texture_glyph_t *glyph = texture_font_get_glyph(fonts[i], codepoint);
float r = 0.0;
float g = 0.0;
float b = 0.0;
float a = 1.0;
float x0 = x + x_offset + glyph->offset_x;
float x1 = x0 + glyph->width;
float y0 = floor(y + y_offset + glyph->offset_y);
float y1 = floor(y0 - glyph->height);
float s0 = glyph->s0;
float t0 = glyph->t0;
float s1 = glyph->s1;
float t1 = glyph->t1;
vertex_t vertices[4] = {
{x0,y0,0, s0,t0, r,g,b,a, shift, gamma},
{x0,y1,0, s0,t1, r,g,b,a, shift, gamma},
{x1,y1,0, s1,t1, r,g,b,a, shift, gamma},
{x1,y0,0, s1,t0, r,g,b,a, shift, gamma} };
GLuint indices[6] = { 0,1,2, 0,2,3 };
vertex_buffer_push_back( vbuffer, vertices, 4, indices, 6 );
x += x_advance;
y += y_advance;
}
/* clean up the buffer, but don't kill it just yet */
hb_buffer_reset(buffer);
}
glClearColor(1,1,1,1);
glEnable( GL_BLEND );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
glEnable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, atlas->id );
texture_atlas_upload( atlas );
vertex_buffer_upload( vbuffer );
shader = shader_load("shaders/text.vert", "shaders/text.frag");
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
