Merge Freetype text plugin

cmake/Modules/FindFreetype.cmake

@@ -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()

plugins/CMakeLists.txt

@@ -19,3 +19,4 @@ add_subdirectory(obs-libfdk)
 add_subdirectory(obs-ffmpeg)
 add_subdirectory(obs-outputs)
 add_subdirectory(rtmp-services)
+add_subdirectory(text-freetype2)

plugins/text-freetype2/CMakeLists.txt

@@ -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)

plugins/text-freetype2/data/locale/en-US.ini

@@ -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"

plugins/text-freetype2/data/text_default.effect

@@ -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);
+	}
+}

plugins/text-freetype2/obs-convenience.c

@@ -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);
+}

plugins/text-freetype2/obs-convenience.h

@@ -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;

plugins/text-freetype2/text-freetype2.c

@@ -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;
+}

plugins/text-freetype2/text-freetype2.h

@@ -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);

plugins/text-freetype2/text-functionality.c

@@ -0,0 +1,457 @@
+/******************************************************************************
+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;
+}