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Merge Freetype text plugin

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This commit is contained in:
paibox 2014-08-17 05:20:38 -07:00 committed by jp9000
parent 83fe23e168
commit e1611b431c
10 changed files with 1221 additions and 0 deletions
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56
cmake/Modules/FindFreetype.cmake Normal file
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@ -0,0 +1,56 @@
# Once done these will be defined:
#
# LIBFREETYPE_FOUND
# LIBFREETYPE_INCLUDE_DIRS
# LIBFREETYPE_LIBRARIES
#
# For use in OBS:
#
# FREETYPE_INCLUDE_DIR
#
if(LIBFREETYPE_INCLUDE_DIRS AND LIBFREETYPE_LIBRARIES)
set(LIBFREETYPE_FOUND TRUE)
else()
find_package(PkgConfig QUIET)
if (PKG_CONFIG_FOUND)
pkg_check_modules(_FREETYPE QUIET freetype2)
endif()
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
set(_lib_suffix 64)
else()
set(_lib_suffix 32)
endif()
set(FREETYPE_PATH_ARCH FreetypePath${_lib_suffix})
find_path(FREETYPE_INCLUDE_DIR
NAMES ft2build.h
HINTS
${_FREETYPE_INCLUDE_DIRS}
"${CMAKE_SOURCE_DIR}/additional_install_files/include"
"$ENV{obsAdditionalInstallFiles}/include"
ENV FreetypePath
ENV ${FREETYPE_PATH_ARCH}
PATHS
/usr/include /usr/local/include /opt/local/include /sw/include)
find_library(FREETYPE_LIB
NAMES ${_FREETYPE_LIBRARIES} freetype libfreetype
HINTS
${_FREETYPE_LIBRARY_DIRS}
"${FREETYPE_INCLUDE_DIR}/../lib"
"${FREETYPE_INCLUDE_DIR}/../lib${_lib_suffix}"
"${FREETYPE_INCLUDE_DIR}/../libs${_lib_suffix}"
"${FREETYPE_INCLUDE_DIR}/lib"
"${FREETYPE_INCLUDE_DIR}/lib${_lib_suffix}"
PATHS
/usr/lib /usr/local/lib /opt/local/lib /sw/lib)
set(LIBFREETYPE_INCLUDE_DIRS ${FREETYPE_INCLUDE_DIR} CACHE PATH "freetype include dir")
set(LIBFREETYPE_LIBRARIES ${FREETYPE_LIB} CACHE STRING "freetype libraries")
find_package_handle_standard_args(Libfreetype DEFAULT_MSG FREETYPE_LIB FREETYPE_INCLUDE_DIR)
mark_as_advanced(FREETYPE_INCLUDE_DIR FREETYPE_LIB)
endif()

1
plugins/CMakeLists.txt
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@ -19,3 +19,4 @@ add_subdirectory(obs-libfdk)
add_subdirectory(obs-ffmpeg) add_subdirectory(obs-ffmpeg)
add_subdirectory(obs-outputs) add_subdirectory(obs-outputs)
add_subdirectory(rtmp-services) add_subdirectory(rtmp-services)
add_subdirectory(text-freetype2)

23
plugins/text-freetype2/CMakeLists.txt Normal file
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@ -0,0 +1,23 @@
project(text-freetype2)
find_package(Freetype REQUIRED)
include_directories(
SYSTEM "${CMAKE_SOURCE_DIR}/libobs"
${LIBFREETYPE_INCLUDE_DIRS})
set(text-freetype2_SOURCES
obs-convenience.c
text-functionality.c
text-freetype2.c
obs-convenience.h
text-freetype2.h)
add_library(text-freetype2 MODULE
${text-freetype2_SOURCES})
target_link_libraries(text-freetype2
libobs
${LIBFREETYPE_LIBRARIES})
install_obs_plugin(text-freetype2)
install_obs_plugin_data(text-freetype2 data)

12
plugins/text-freetype2/data/locale/en-US.ini Normal file
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@ -0,0 +1,12 @@
FontFile="Font File"
Text="Text"
TextFile="Text File (UTF-8 or UTF-16)"
ChatLogMode="Chat log mode (last 6 lines)"
FontSize="Font Size (Pixels)"
Color1="Color 1"
Color2="Color 2"
Outline="Outline"
DropShadow="Drop Shadow"
ReadFromFile="Read from file"
CustomWidth="Custom text width"
WordWrap="Word Wrap"

56
plugins/text-freetype2/data/text_default.effect Normal file
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@ -0,0 +1,56 @@
uniform float4x4 ViewProj;
uniform float4x4 color_matrix;
uniform float3 color_range_min = {0.0, 0.0, 0.0};
uniform float3 color_range_max = {1.0, 1.0, 1.0};
uniform texture2d image;
sampler_state def_sampler {
Filter = Linear;
AddressU = Clamp;
AddressV = Clamp;
};
struct VertInOut {
float4 pos : POSITION;
float2 uv : TEXCOORD0;
float4 col : COLOR;
};
VertInOut VSDefault(VertInOut vert_in)
{
VertInOut vert_out;
vert_out.pos = mul(float4(vert_in.pos.xyz, 1.0), ViewProj);
vert_out.uv = vert_in.uv;
vert_out.col = vert_in.col;
return vert_out;
}
float4 PSDrawBare(VertInOut vert_in) : TARGET
{
return image.Sample(def_sampler, vert_in.uv) * vert_in.col;
}
float4 PSDrawMatrix(VertInOut vert_in) : TARGET
{
float4 yuv = image.Sample(def_sampler, vert_in.uv);
yuv.xyz = clamp(yuv.xyz, color_range_min, color_range_max);
return saturate(mul(float4(yuv.xyz, 1.0), color_matrix));
}
technique Draw
{
pass
{
vertex_shader = VSDefault(vert_in);
pixel_shader = PSDrawBare(vert_in);
}
}
technique DrawMatrix
{
pass
{
vertex_shader = VSDefault(vert_in);
pixel_shader = PSDrawMatrix(vert_in);
}
}

84
plugins/text-freetype2/obs-convenience.c Normal file
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@ -0,0 +1,84 @@
/******************************************************************************
Copyright (C) 2014 by Nibbles
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include <obs-module.h>
#include <graphics/vec2.h>
#include <graphics/vec3.h>
#include <graphics/vec4.h>
#include "obs-convenience.h"
gs_vertbuffer_t create_uv_vbuffer(uint32_t num_verts, bool add_color) {
obs_enter_graphics();
gs_vertbuffer_t tmp = NULL;
struct gs_vb_data *vrect = NULL;
vrect = gs_vbdata_create();
vrect->num = num_verts;
vrect->points = (struct vec3 *)bmalloc(sizeof(struct vec3) * num_verts);
vrect->num_tex = 1;
vrect->tvarray =
(struct gs_tvertarray *)bmalloc(sizeof(struct gs_tvertarray));
vrect->tvarray[0].width = 2;
vrect->tvarray[0].array = bmalloc(sizeof(struct vec2) * num_verts);
if (add_color)
vrect->colors = (uint32_t *)bmalloc
(sizeof(uint32_t)* num_verts);
memset(vrect->points, 0, sizeof(struct vec3) * num_verts);
memset(vrect->tvarray[0].array, 0, sizeof(struct vec2) * num_verts);
if (add_color)
memset(vrect->colors, 0, sizeof(uint32_t)* num_verts);
tmp = gs_vertexbuffer_create(vrect, GS_DYNAMIC);
if (tmp == NULL) {
blog(LOG_WARNING, "Couldn't create UV vertex buffer.");
}
obs_leave_graphics();
return tmp;
}
void draw_uv_vbuffer(gs_vertbuffer_t vbuf, gs_texture_t tex, gs_effect_t effect,
uint32_t num_verts) {
gs_texture_t texture = tex;
gs_technique_t tech = gs_effect_get_technique(effect, "Draw");
gs_eparam_t image = gs_effect_get_param_by_name(effect, "image");
size_t passes;
if (vbuf == NULL || tex == NULL) return;
gs_vertexbuffer_flush(vbuf);
gs_load_vertexbuffer(vbuf);
gs_load_indexbuffer(NULL);
passes = gs_technique_begin(tech);
for (size_t i = 0; i < passes; i++) {
if (gs_technique_begin_pass(tech, i)) {
gs_effect_set_texture(image, texture);
gs_draw(GS_TRIS, 0, num_verts);
gs_technique_end_pass(tech);
}
}
gs_technique_end(tech);
}

43
plugins/text-freetype2/obs-convenience.h Normal file
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@ -0,0 +1,43 @@
/******************************************************************************
Copyright (C) 2014 by Nibbles
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include <obs-module.h>
gs_vertbuffer_t create_uv_vbuffer(uint32_t num_verts, bool add_color);
void draw_uv_vbuffer(gs_vertbuffer_t vbuf, gs_texture_t tex, gs_effect_t effect,
uint32_t num_verts);
#define set_v3_rect(a, x, y, w, h) \
vec3_set(a, x, y, 0.0f); \
vec3_set(a + 1, x + w, y, 0.0f); \
vec3_set(a + 2, x, y + h, 0.0f); \
vec3_set(a + 3, x, y + h, 0.0f); \
vec3_set(a + 4, x + w, y, 0.0f); \
vec3_set(a + 5, x + w, y + h, 0.0f);
#define set_v2_uv(a, u, v, u2, v2) \
vec2_set(a, u, v); \
vec2_set(a + 1, u2, v); \
vec2_set(a + 2, u, v2); \
vec2_set(a + 3, u, v2); \
vec2_set(a + 4, u2, v); \
vec2_set(a + 5, u2, v2);
#define set_rect_colors2(a, c1, c2) \
uint32_t *b = a; \
b[0] = b[1] = b[4] = c1; \
b[2] = b[3] = b[5] = c2;

399
plugins/text-freetype2/text-freetype2.c Normal file
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@ -0,0 +1,399 @@
/******************************************************************************
Copyright (C) 2014 by Nibbles
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include <obs-module.h>
#include <util/platform.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include <sys/stat.h>
#include "text-freetype2.h"
#include "obs-convenience.h"
FT_Library ft2_lib;
OBS_DECLARE_MODULE()
OBS_MODULE_USE_DEFAULT_LOCALE("text-freetype2", "en-US")
uint32_t texbuf_w = 2048, texbuf_h = 2048;
static struct obs_source_info freetype2_source_info = {
.id = "text_ft2_source",
.type = OBS_SOURCE_TYPE_INPUT,
.output_flags = OBS_SOURCE_VIDEO,
.get_name = ft2_source_get_name,
.create = ft2_source_create,
.destroy = ft2_source_destroy,
.update = ft2_source_update,
.get_width = ft2_source_get_width,
.get_height = ft2_source_get_height,
.video_render = ft2_source_render,
.video_tick = ft2_video_tick,
.get_properties = ft2_source_properties,
};
bool obs_module_load()
{
FT_Init_FreeType(&ft2_lib);
if (ft2_lib == NULL) {
blog(LOG_WARNING, "FT2-text: Failed to initialize FT2.");
return false;
}
obs_register_source(&freetype2_source_info);
return true;
}
void obs_module_unload(void)
{
FT_Done_FreeType(ft2_lib);
}
static const char *ft2_source_get_name(void)
{
return obs_module_text("Text (FreeType 2)");
}
static uint32_t ft2_source_get_width(void *data)
{
struct ft2_source *srcdata = data;
return srcdata->cx;
}
static uint32_t ft2_source_get_height(void *data)
{
struct ft2_source *srcdata = data;
return srcdata->cy;
}
static obs_properties_t ft2_source_properties(void)
{
obs_properties_t props = obs_properties_create();
//obs_property_t prop;
// TODO:
// Get system fonts, no idea how.
// Scrolling. Can't think of a way to do it with the render
// targets currently being broken. (0.4.2)
// Better/pixel shader outline/drop shadow
// Some way to pull text files from network, I dunno
obs_properties_add_path(props,
"font_file", obs_module_text("FontFile"),
OBS_PATH_FILE, "All font formats (*.ttf *.otf);;", NULL);
obs_properties_add_text(props, "text",
obs_module_text("Text"), OBS_TEXT_MULTILINE);
obs_properties_add_bool(props, "from_file",
obs_module_text("ReadFromFile"));
obs_properties_add_bool(props, "log_mode",
obs_module_text("ChatLogMode"));
obs_properties_add_path(props,
"text_file", obs_module_text("TextFile"),
OBS_PATH_FILE, "All font formats (*.txt);;", NULL);
obs_properties_add_int(props, "font_size",
obs_module_text("FontSize"), 0, 72, 1);
obs_properties_add_color(props, "color1",
obs_module_text("Color1"));
obs_properties_add_color(props, "color2",
obs_module_text("Color2"));
obs_properties_add_bool(props, "outline",
obs_module_text("Outline"));
obs_properties_add_bool(props, "drop_shadow",
obs_module_text("DropShadow"));
obs_properties_add_int(props, "custom_width",
obs_module_text("CustomWidth"), 0, 4096, 1);
obs_properties_add_bool(props, "word_wrap",
obs_module_text("WordWrap"));
return props;
}
static void ft2_source_destroy(void *data)
{
struct ft2_source *srcdata = data;
if (srcdata->font_face != NULL) {
FT_Done_Face(srcdata->font_face);
srcdata->font_face = NULL;
}
for (uint32_t i = 0; i < num_cache_slots; i++) {
if (srcdata->cacheglyphs[i] != NULL) {
bfree(srcdata->cacheglyphs[i]);
srcdata->cacheglyphs[i] = NULL;
}
}
if (srcdata->font_name != NULL)
bfree(srcdata->font_name);
if (srcdata->text != NULL)
bfree(srcdata->text);
if (srcdata->texbuf != NULL)
bfree(srcdata->texbuf);
if (srcdata->colorbuf != NULL)
bfree(srcdata->colorbuf);
if (srcdata->text_file != NULL)
bfree(srcdata->text_file);
obs_enter_graphics();
if (srcdata->tex != NULL) {
gs_texture_destroy(srcdata->tex);
srcdata->tex = NULL;
}
if (srcdata->vbuf != NULL) {
gs_vertexbuffer_destroy(srcdata->vbuf);
srcdata->vbuf = NULL;
}
if (srcdata->draw_effect != NULL) {
gs_effect_destroy(srcdata->draw_effect);
srcdata->draw_effect = NULL;
}
obs_leave_graphics();
bfree(srcdata);
}
static void ft2_source_render(void *data, gs_effect_t effect)
{
struct ft2_source *srcdata = data;
if (srcdata == NULL) return;
if (srcdata->tex == NULL || srcdata->vbuf == NULL) return;
gs_reset_blend_state();
if (srcdata->outline_text) draw_outlines(srcdata);
if (srcdata->drop_shadow) draw_drop_shadow(srcdata);
draw_uv_vbuffer(srcdata->vbuf, srcdata->tex,
srcdata->draw_effect, (uint32_t)wcslen(srcdata->text) * 6);
UNUSED_PARAMETER(effect);
}
static void ft2_video_tick(void *data, float seconds)
{
struct ft2_source *srcdata = data;
if (srcdata == NULL) return;
if (srcdata->text_file == NULL) return;
if (os_gettime_ns() - srcdata->last_checked >= 1000000000) {
srcdata->last_checked = os_gettime_ns();
if (srcdata->m_timestamp !=
get_modified_timestamp(srcdata->text_file)) {
if (srcdata->log_mode)
read_from_end(srcdata, srcdata->text_file);
else
load_text_from_file(srcdata,
srcdata->text_file);
set_up_vertex_buffer(srcdata);
}
}
UNUSED_PARAMETER(seconds);
}
static void ft2_source_update(void *data, obs_data_t settings)
{
struct ft2_source *srcdata = data;
const char *tmp = obs_data_get_string(settings, "font_file");
bool vbuf_needs_update = false;
bool word_wrap = false;
uint32_t color[2];
uint32_t custom_width = 0;
srcdata->drop_shadow = obs_data_get_bool(settings, "drop_shadow");
srcdata->outline_text = obs_data_get_bool(settings, "outline");
word_wrap = obs_data_get_bool(settings, "word_wrap");
color[0] = (uint32_t)obs_data_get_int(settings, "color1");
color[1] = (uint32_t)obs_data_get_int(settings, "color2");
custom_width = (uint32_t)obs_data_get_int(settings, "custom_width");
if (custom_width >= 100) {
if (custom_width != srcdata->custom_width) {
srcdata->custom_width = custom_width;
vbuf_needs_update = true;
}
}
else {
if (srcdata->custom_width >= 100)
vbuf_needs_update = true;
srcdata->custom_width = 0;
}
if (word_wrap != srcdata->word_wrap) {
srcdata->word_wrap = word_wrap;
vbuf_needs_update = true;
}
if (color[0] != srcdata->color[0] || color[1] != srcdata->color[1]) {
srcdata->color[0] = color[0];
srcdata->color[1] = color[1];
vbuf_needs_update = true;
}
bool from_file = obs_data_get_bool(settings, "from_file");
bool chat_log_mode = obs_data_get_bool(settings, "log_mode");
srcdata->log_mode = chat_log_mode;
if (ft2_lib == NULL) return;
if (!from_file) {
if (srcdata->text_file != NULL) {
bfree(srcdata->text_file);
srcdata->text_file = NULL;
}
}
if (srcdata->draw_effect == NULL) {
char *effect_file = NULL;
char *error_string = NULL;
effect_file =
obs_module_file("text_default.effect");
if (effect_file) {
obs_enter_graphics();
srcdata->draw_effect = gs_effect_create_from_file(
effect_file, &error_string);
obs_leave_graphics();
bfree(effect_file);
if (error_string != NULL)
bfree(error_string);
}
}
if (srcdata->font_size != obs_data_get_int(settings, "font_size"))
vbuf_needs_update = true;
if (srcdata->font_name != NULL) {
if (strcmp(tmp, srcdata->font_name) == 0 &&
srcdata->font_size ==
obs_data_get_int(settings, "font_size"))
goto skip_font_load;
bfree(srcdata->font_name);
srcdata->font_name = NULL;
srcdata->max_h = 0;
}
srcdata->font_name = bzalloc(strlen(tmp) + 1);
strcpy(srcdata->font_name, tmp);
if (srcdata->font_face != NULL) {
FT_Done_Face(srcdata->font_face);
srcdata->font_face = NULL;
}
FT_New_Face(ft2_lib, srcdata->font_name, 0,
&srcdata->font_face);
if (srcdata->font_face == NULL) {
blog(LOG_WARNING, "FT2-text: Failed to load font %s",
srcdata->font_name);
return;
}
else {
srcdata->font_size = (uint16_t)obs_data_get_int(settings,
"font_size");
FT_Set_Pixel_Sizes(srcdata->font_face, 0, srcdata->font_size);
FT_Select_Charmap(srcdata->font_face, FT_ENCODING_UNICODE);
}
if (srcdata->texbuf != NULL) {
bfree(srcdata->texbuf);
srcdata->texbuf = NULL;
}
srcdata->texbuf = bzalloc(texbuf_w * texbuf_h * 4);
cache_standard_glyphs(srcdata);
skip_font_load:;
if (from_file) {
tmp = obs_data_get_string(settings, "text_file");
if (strlen(tmp) == 0)
return;
if (srcdata->text_file != NULL) {
if (strcmp(srcdata->text_file, tmp) == 0
&& !vbuf_needs_update)
return;
bfree(srcdata->text_file);
srcdata->text_file = NULL;
}
else
blog(LOG_WARNING,
"FT2-text: Failed to open %s for reading", tmp);
srcdata->text_file = bzalloc(strlen(tmp) + 1);
strcpy(srcdata->text_file, tmp);
if (chat_log_mode)
read_from_end(srcdata, tmp);
else
load_text_from_file(srcdata, tmp);
srcdata->last_checked = os_gettime_ns();
}
else {
tmp = obs_data_get_string(settings, "text");
if (strlen(tmp) == 0) return;
if (srcdata->text != NULL) {
bfree(srcdata->text);
srcdata->text = NULL;
}
srcdata->text = bzalloc((strlen(tmp) + 1)*sizeof(wchar_t));
os_utf8_to_wcs(tmp, strlen(tmp), srcdata->text,
(strlen(tmp) + 1));
}
cache_glyphs(srcdata, srcdata->text);
set_up_vertex_buffer(srcdata);
}
static void *ft2_source_create(obs_data_t settings, obs_source_t source)
{
struct ft2_source *srcdata = bzalloc(sizeof(struct ft2_source));
srcdata->src = source;
srcdata->font_size = 32;
obs_data_set_default_int(settings, "font_size", 32);
obs_data_set_default_int(settings, "color1", 0xFFFFFFFF);
obs_data_set_default_int(settings, "color2", 0xFFFFFFFF);
obs_data_set_default_string(settings, "text",
"The lazy snake jumps over the happy MASKEN.");
ft2_source_update(srcdata, settings);
return srcdata;
}

90
plugins/text-freetype2/text-freetype2.h Normal file
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@ -0,0 +1,90 @@
/******************************************************************************
Copyright (C) 2014 by Nibbles
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include <obs-module.h>
#include <ft2build.h>
#define num_cache_slots 65535
#define src_glyph srcdata->cacheglyphs[glyph_index]
struct glyph_info {
float u, v, u2, v2;
int32_t w, h, xoff, yoff;
int32_t xadv;
};
struct ft2_source {
uint8_t font_type;
char *font_name;
char *text_file;
wchar_t *text;
uint16_t font_size;
time_t m_timestamp;
uint64_t last_checked;
uint32_t cx, cy, max_h, custom_width;
uint32_t texbuf_x, texbuf_y;
uint32_t color[2];
uint32_t *colorbuf;
int32_t cur_scroll, scroll_speed;
gs_texture_t tex;
struct glyph_info *cacheglyphs[num_cache_slots];
FT_Face font_face;
uint32_t *texbuf;
gs_vertbuffer_t vbuf;
gs_effect_t draw_effect;
bool outline_text, drop_shadow;
bool log_mode, word_wrap;
obs_source_t src;
};
extern FT_Library ft2_lib;
static void *ft2_source_create(obs_data_t settings, obs_source_t source);
static void ft2_source_destroy(void *data);
static void ft2_source_update(void *data, obs_data_t settings);
static void ft2_source_render(void *data, gs_effect_t effect);
static void ft2_video_tick(void *data, float seconds);
void draw_outlines(struct ft2_source *srcdata);
void draw_drop_shadow(struct ft2_source *srcdata);
static uint32_t ft2_source_get_width(void *data);
static uint32_t ft2_source_get_height(void *data);
static obs_properties_t ft2_source_properties(void);
static const char *ft2_source_get_name(void);
uint32_t get_ft2_text_width(wchar_t *text, struct ft2_source *srcdata);
time_t get_modified_timestamp(char *filename);
void load_text_from_file(struct ft2_source *srcdata, const char *filename);
void read_from_end(struct ft2_source *srcdata, const char *filename);
void cache_standard_glyphs(struct ft2_source *srcdata);
void cache_glyphs(struct ft2_source *srcdata, wchar_t *cache_glyphs);
void set_up_vertex_buffer(struct ft2_source *srcdata);
void fill_vertex_buffer(struct ft2_source *srcdata);

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/******************************************************************************
Copyright (C) 2014 by Nibbles
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include <obs-module.h>
#include <util/platform.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include <sys/stat.h>
#include "text-freetype2.h"
#include "obs-convenience.h"
float offsets[16] = { -2.0f, 0.0f, 0.0f, -2.0f, 2.0f, 0.0f, 2.0f, 0.0f,
0.0f, 2.0f, 0.0f, 2.0f, -2.0f, 0.0f, -2.0f, 0.0f };
extern uint32_t texbuf_w, texbuf_h;
void draw_outlines(struct ft2_source *srcdata)
{
// Horrible (hopefully temporary) solution for outlines.
uint32_t *tmp;
struct gs_vb_data *vdata = gs_vertexbuffer_get_data(srcdata->vbuf);
tmp = vdata->colors;
vdata->colors = srcdata->colorbuf;
gs_matrix_push();
for (int32_t i = 0; i < 8; i++) {
gs_matrix_translate3f(offsets[i * 2], offsets[(i * 2) + 1],
0.0f);
draw_uv_vbuffer(srcdata->vbuf, srcdata->tex,
srcdata->draw_effect,
(uint32_t)wcslen(srcdata->text) * 6);
}
gs_matrix_identity();
gs_matrix_pop();
vdata->colors = tmp;
}
void draw_drop_shadow(struct ft2_source *srcdata)
{
// Horrible (hopefully temporary) solution for drop shadow.
uint32_t *tmp;
struct gs_vb_data *vdata = gs_vertexbuffer_get_data(srcdata->vbuf);
tmp = vdata->colors;
vdata->colors = srcdata->colorbuf;
gs_matrix_push();
gs_matrix_translate3f(4.0f, 4.0f, 0.0f);
draw_uv_vbuffer(srcdata->vbuf, srcdata->tex,
srcdata->draw_effect, (uint32_t)wcslen(srcdata->text) * 6);
gs_matrix_identity();
gs_matrix_pop();
vdata->colors = tmp;
}
void set_up_vertex_buffer(struct ft2_source *srcdata)
{
FT_UInt glyph_index = 0;
uint32_t x = 0, space_pos = 0, word_width = 0;
if (srcdata->custom_width >= 100)
srcdata->cx = srcdata->custom_width;
else
srcdata->cx = get_ft2_text_width(srcdata->text, srcdata);
srcdata->cy = srcdata->max_h;
obs_enter_graphics();
if (srcdata->vbuf != NULL) {
gs_vertbuffer_t tmpvbuf = srcdata->vbuf;
srcdata->vbuf = NULL;
gs_vertexbuffer_destroy(tmpvbuf);
}
srcdata->vbuf = create_uv_vbuffer((uint32_t)wcslen(srcdata->text) * 6,
true);
if (srcdata->custom_width <= 100) goto skip_word_wrap;
if (!srcdata->word_wrap) goto skip_word_wrap;
for (uint32_t i = 0; i <= wcslen(srcdata->text); i++) {
if (i == wcslen(srcdata->text)) goto eos_check;
if (srcdata->text[i] != L' ' && srcdata->text[i] != L'\n')
goto next_char;
eos_check:;
if (x + word_width > srcdata->custom_width) {
if (space_pos != 0)
srcdata->text[space_pos] = L'\n';
x = 0;
}
if (i == wcslen(srcdata->text)) goto eos_skip;
x += word_width;
word_width = 0;
if (srcdata->text[i] == L'\n')
x = 0;
if (srcdata->text[i] == L' ')
space_pos = i;
next_char:;
glyph_index = FT_Get_Char_Index(srcdata->font_face,
srcdata->text[i]);
word_width += src_glyph->xadv;
eos_skip:;
}
skip_word_wrap:;
fill_vertex_buffer(srcdata);
obs_leave_graphics();
}
void fill_vertex_buffer(struct ft2_source *srcdata)
{
struct gs_vb_data *vdata = gs_vertexbuffer_get_data(srcdata->vbuf);
if (vdata == NULL) return;
struct vec2 *tvarray = (struct vec2 *)vdata->tvarray[0].array;
uint32_t *col = (uint32_t *)vdata->colors;
FT_UInt glyph_index = 0;
uint32_t dx = 0, dy = srcdata->max_h, max_y = dy;
uint32_t cur_glyph = 0;
if (srcdata->colorbuf != NULL) {
bfree(srcdata->colorbuf);
srcdata->colorbuf = NULL;
}
srcdata->colorbuf = bzalloc(sizeof(uint32_t)*wcslen(srcdata->text) * 6);
for (uint32_t i = 0; i < wcslen(srcdata->text) * 6; i++) {
srcdata->colorbuf[i] = 0xFF000000;
}
for (uint32_t i = 0; i < wcslen(srcdata->text); i++) {
add_linebreak:;
if (srcdata->text[i] != L'\n') goto draw_glyph;
dx = 0; i++;
dy += srcdata->max_h + 4;
if (i == wcslen(srcdata->text)) goto skip_glyph;
if (srcdata->text[i] == L'\n') goto add_linebreak;
draw_glyph:;
// Skip filthy dual byte Windows line breaks
if (srcdata->text[i] == L'\r') goto skip_glyph;
glyph_index = FT_Get_Char_Index(srcdata->font_face,
srcdata->text[i]);
if (src_glyph == NULL)
goto skip_glyph;
if (srcdata->custom_width < 100) goto skip_custom_width;
if (dx + src_glyph->xadv > srcdata->custom_width) {
dx = 0;
dy += srcdata->max_h + 4;
}
skip_custom_width:;
set_v3_rect(vdata->points + (cur_glyph * 6),
(float)dx + (float)src_glyph->xoff,
(float)dy - (float)src_glyph->yoff,
(float)src_glyph->w,
(float)src_glyph->h);
set_v2_uv(tvarray + (cur_glyph * 6),
src_glyph->u,
src_glyph->v,
src_glyph->u2,
src_glyph->v2);
set_rect_colors2(col + (cur_glyph * 6),
srcdata->color[0],
srcdata->color[1]);
dx += src_glyph->xadv;
if (dy - (float)src_glyph->yoff + src_glyph->h > max_y)
max_y = dy - src_glyph->yoff + src_glyph->h;
cur_glyph++;
skip_glyph:;
}
srcdata->cy = max_y;
}
void cache_standard_glyphs(struct ft2_source *srcdata)
{
for (uint32_t i = 0; i < num_cache_slots; i++) {
if (srcdata->cacheglyphs[i] != NULL) {
bfree(srcdata->cacheglyphs[i]);
srcdata->cacheglyphs[i] = NULL;
}
}
srcdata->texbuf_x = 0;
srcdata->texbuf_y = 0;
cache_glyphs(srcdata, L"abcdefghijklmnopqrstuvwxyz" \
L"ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890" \
L"!@#$%^&*()-_=+,<.>/?\\|[]{}`~ \'\"\0");
}
#define glyph_pos x + (y*slot->bitmap.pitch)
#define buf_pos (dx + x) + ((dy + y) * texbuf_w)
void cache_glyphs(struct ft2_source *srcdata, wchar_t *cache_glyphs)
{
FT_GlyphSlot slot = srcdata->font_face->glyph;
FT_UInt glyph_index = 0;
uint32_t dx = srcdata->texbuf_x, dy = srcdata->texbuf_y;
uint8_t alpha;
int32_t g_pitch = 0;
int32_t cached_glyphs = 0;
for (uint32_t i = 0; i < wcslen(cache_glyphs); i++) {
glyph_index = FT_Get_Char_Index(srcdata->font_face,
cache_glyphs[i]);
if (src_glyph != NULL)
goto skip_glyph;
FT_Load_Glyph(srcdata->font_face, glyph_index, FT_LOAD_DEFAULT);
FT_Render_Glyph(slot, FT_RENDER_MODE_NORMAL);
uint32_t g_w = slot->bitmap.width;
uint32_t g_h = slot->bitmap.rows;
g_pitch = slot->bitmap.pitch;
if (srcdata->max_h < g_h) srcdata->max_h = g_h;
if (dx + g_w >= texbuf_w) {
dx = 0;
dy += srcdata->max_h + 1;
}
src_glyph = bzalloc(sizeof(struct glyph_info));
src_glyph->u = (float)dx / (float)texbuf_w;
src_glyph->u2 = (float)(dx + g_w) / (float)texbuf_w;
src_glyph->v = (float)dy / (float)texbuf_h;
src_glyph->v2 = (float)(dy + g_h) / (float)texbuf_h;
src_glyph->w = g_w;
src_glyph->h = g_h;
src_glyph->yoff = slot->bitmap_top;
src_glyph->xoff = slot->bitmap_left;
src_glyph->xadv = slot->advance.x >> 6;
for (uint32_t y = 0; y < g_h; y++) {
for (uint32_t x = 0; x < g_w; x++) {
alpha = slot->bitmap.buffer[glyph_pos];
srcdata->texbuf[buf_pos] =
0x00FFFFFF ^ (alpha << 24);
}
}
dx += (g_w + 1);
if (dx >= texbuf_w) {
dx = 0;
dy += srcdata->max_h;
}
cached_glyphs++;
skip_glyph:;
}
srcdata->texbuf_x = dx;
srcdata->texbuf_y = dy;
if (cached_glyphs > 0) {
obs_enter_graphics();
if (srcdata->tex != NULL) {
gs_texture_t tmp_texture = NULL;
tmp_texture = srcdata->tex;
srcdata->tex = NULL;
gs_texture_destroy(tmp_texture);
}
srcdata->tex = gs_texture_create(texbuf_w, texbuf_h,
GS_RGBA, 1, (const uint8_t **)&srcdata->texbuf, 0);
obs_leave_graphics();
}
}
time_t get_modified_timestamp(char *filename)
{
struct stat stats;
// stat is apparently terrifying and horrible, but we only call it once
// every second at most.
stat(filename, &stats);
return stats.st_mtime;
}
void load_text_from_file(struct ft2_source *srcdata, const char *filename)
{
FILE *tmp_file = NULL;
uint32_t filesize = 0;
char *tmp_read = NULL;
uint16_t header = 0;
tmp_file = fopen(filename, "rb");
if (tmp_file == NULL) {
blog(LOG_WARNING, "Failed to open file %s", filename);
return;
}
fseek(tmp_file, 0, SEEK_END);
filesize = (uint32_t)ftell(tmp_file);
fseek(tmp_file, 0, SEEK_SET);
fread(&header, 2, 1, tmp_file);
if (header == 0xFEFF) {
// File is already in UTF-16 format
if (srcdata->text != NULL) {
bfree(srcdata->text);
srcdata->text = NULL;
}
srcdata->text = bzalloc(filesize);
fread(srcdata->text, filesize - 2, 1, tmp_file);
srcdata->m_timestamp =
get_modified_timestamp(srcdata->text_file);
bfree(tmp_read);
fclose(tmp_file);
return;
}
fseek(tmp_file, 0, SEEK_SET);
srcdata->m_timestamp = get_modified_timestamp(srcdata->text_file);
tmp_read = bzalloc(filesize + 1);
fread(tmp_read, filesize, 1, tmp_file);
fclose(tmp_file);
if (srcdata->text != NULL) {
bfree(srcdata->text);
srcdata->text = NULL;
}
srcdata->text = bzalloc((strlen(tmp_read) + 1)*sizeof(wchar_t));
os_utf8_to_wcs(tmp_read, strlen(tmp_read),
srcdata->text, (strlen(tmp_read) + 1));
bfree(tmp_read);
}
void read_from_end(struct ft2_source *srcdata, const char *filename)
{
FILE *tmp_file = NULL;
uint32_t filesize = 0, cur_pos = 0;
char *tmp_read = NULL;
uint16_t value = 0, line_breaks = 0;
char bvalue;
bool utf16 = false;
tmp_file = fopen(filename, "rb");
if (tmp_file == NULL) {
blog(LOG_WARNING, "Failed to open file %s", filename);
return;
}
fread(&value, 2, 1, tmp_file);
if (value == 0xFEFF)
utf16 = true;
fseek(tmp_file, 0, SEEK_END);
filesize = (uint32_t)ftell(tmp_file);
cur_pos = filesize;
while (line_breaks <= 6 && cur_pos != 0) {
if (!utf16) cur_pos--;
else cur_pos -= 2;
fseek(tmp_file, cur_pos, SEEK_SET);
if (!utf16) {
fread(&bvalue, 1, 1, tmp_file);
if (bvalue == '\n')
line_breaks++;
}
else {
fread(&value, 2, 1, tmp_file);
if (value == L'\n')
line_breaks++;
}
}
if (cur_pos != 0)
cur_pos += (utf16) ? 2 : 1;
fseek(tmp_file, cur_pos, SEEK_SET);
if (utf16) {
if (srcdata->text != NULL) {
bfree(srcdata->text);
srcdata->text = NULL;
}
srcdata->text = bzalloc(filesize - cur_pos);
fread(srcdata->text, (filesize - cur_pos), 1, tmp_file);
srcdata->m_timestamp =
get_modified_timestamp(srcdata->text_file);
bfree(tmp_read);
fclose(tmp_file);
return;
}
tmp_read = bzalloc((filesize - cur_pos) + 1);
fread(tmp_read, filesize - cur_pos, 1, tmp_file);
fclose(tmp_file);
if (srcdata->text != NULL) {
bfree(srcdata->text);
srcdata->text = NULL;
}
srcdata->text = bzalloc((strlen(tmp_read) + 1)*sizeof(wchar_t));
os_utf8_to_wcs(tmp_read, strlen(tmp_read),
srcdata->text, (strlen(tmp_read) + 1));
srcdata->m_timestamp = get_modified_timestamp(srcdata->text_file);
bfree(tmp_read);
}
uint32_t get_ft2_text_width(wchar_t *text, struct ft2_source *srcdata)
{
FT_GlyphSlot slot = srcdata->font_face->glyph;
FT_UInt glyph_index = 0;
uint32_t w = 0, max_w = 0;
for (uint32_t i = 0; i < (uint32_t)wcslen(text); i++) {
glyph_index = FT_Get_Char_Index(srcdata->font_face, text[i]);
FT_Load_Glyph(srcdata->font_face, glyph_index, FT_LOAD_DEFAULT);
if (text[i] == L'\n') w = 0;
else {
w += slot->advance.x >> 6;
if (w > max_w) max_w = w;
}
}
return max_w;
}