mirror of
https://github.com/gnif/LookingGlass.git
synced 2024-11-25 06:47:19 +00:00
[client] fonts: remove font rendering machinery
This commit is contained in:
Quantum
Geoffrey McRae
parent
0c35d9b057
commit
f09738678e
@ -17,6 +17,9 @@ else()
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add_compile_options("-march=nehalem" "-mtune=generic")
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endif()
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find_package(PkgConfig)
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pkg_check_modules(FONTCONFIG_PKGCONFIG REQUIRED fontconfig)
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option(ENABLE_OPENGL "Enable the OpenGL renderer" ON)
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add_feature_info(ENABLE_OPENGL ENABLE_OPENGL "Legacy OpenGL renderer.")
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@ -97,6 +100,7 @@ include_directories(
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${PROJECT_SOURCE_DIR}/include
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${CMAKE_BINARY_DIR}/include
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${GMP_INCLUDE_DIR}
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${FONTCONFIG_PKGCONFIG_INCLUDE_DIRS}
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)
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link_libraries(
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@ -139,7 +143,6 @@ add_subdirectory("${PROJECT_TOP}/repos/cimgui" "${CMAKE_BINARY_DIR}/cimgui"
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add_subdirectory(displayservers)
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add_subdirectory(renderers)
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add_subdirectory(fonts)
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add_executable(looking-glass-client ${SOURCES})
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@ -147,12 +150,12 @@ target_compile_definitions(looking-glass-client PRIVATE CIMGUI_DEFINE_ENUMS_AND_
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target_link_libraries(looking-glass-client
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${EXE_FLAGS}
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${FONTCONFIG_PKGCONFIG_LIBRARIES}
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lg_common
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displayservers
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lgmp
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purespice
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renderers
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fonts
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cimgui
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)
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@ -1,41 +0,0 @@
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cmake_minimum_required(VERSION 3.0)
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project(fonts LANGUAGES C)
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set(FONT_H "${CMAKE_BINARY_DIR}/include/dynamic/fonts.h")
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set(FONT_C "${CMAKE_BINARY_DIR}/src/fonts.c")
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file(WRITE ${FONT_H} "#include \"interface/font.h\"\n\n")
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file(APPEND ${FONT_H} "extern LG_Font * LG_Fonts[];\n\n")
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file(WRITE ${FONT_C} "#include \"interface/font.h\"\n\n")
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file(APPEND ${FONT_C} "#include <stddef.h>\n\n")
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set(FONTS "_")
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set(FONTS_LINK "_")
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function(add_font name)
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set(FONTS "${FONTS};${name}" PARENT_SCOPE)
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set(FONTS_LINK "${FONTS_LINK};font_${name}" PARENT_SCOPE)
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add_subdirectory(${name})
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endfunction()
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# Add/remove fonts here!
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add_font(freetype)
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list(REMOVE_AT FONTS 0)
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list(REMOVE_AT FONTS_LINK 0)
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list(LENGTH FONTS FONT_COUNT)
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file(APPEND ${FONT_H} "#define LG_FONT_COUNT ${FONT_COUNT}\n")
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foreach(font ${FONTS})
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file(APPEND ${FONT_C} "extern LG_Font LGF_${font};\n")
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endforeach()
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file(APPEND ${FONT_C} "\nconst LG_Font * LG_Fonts[] =\n{\n")
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foreach(font ${FONTS})
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file(APPEND ${FONT_C} " &LGF_${font},\n")
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endforeach()
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file(APPEND ${FONT_C} " NULL\n};\n\n")
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add_library(fonts STATIC ${FONT_C})
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target_link_libraries(fonts ${FONTS_LINK})
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@ -1,26 +0,0 @@
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cmake_minimum_required(VERSION 3.0)
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project(font_freetype LANGUAGES C)
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find_package(PkgConfig)
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pkg_check_modules(FONT_FREETYPE_PKGCONFIG REQUIRED
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freetype2
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fontconfig
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)
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add_library(font_freetype STATIC
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src/freetype.c
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)
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target_link_libraries(font_freetype
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${FONT_FREETYPE_PKGCONFIG_LIBRARIES}
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lg_common
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)
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target_include_directories(font_freetype
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PUBLIC
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$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
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$<INSTALL_INTERFACE:include>
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PRIVATE
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src
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${FONT_FREETYPE_PKGCONFIG_INCLUDE_DIRS}
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)
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@ -1,325 +0,0 @@
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/**
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* Looking Glass
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* Copyright (C) 2017-2021 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdlib.h>
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#include <stdbool.h>
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#include "interface/font.h"
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#include "common/debug.h"
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include <fontconfig/fontconfig.h>
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static int g_initCount = 0;
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static FcConfig * g_fontConfig = NULL;
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static FT_Library g_ft;
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struct Inst
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{
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FT_Face face;
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unsigned int height;
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};
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static bool lgf_freetype_create(LG_FontObj * opaque, const char * font_name, unsigned int size)
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{
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bool ret = false;
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if (g_initCount == 0)
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{
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if (FT_Init_FreeType(&g_ft))
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{
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DEBUG_ERROR("FT_Init_FreeType Failed");
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goto fail;
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}
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g_fontConfig = FcInitLoadConfigAndFonts();
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if (!g_fontConfig)
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{
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DEBUG_ERROR("FcInitLoadConfigAndFonts Failed");
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goto fail_init;
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}
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}
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*opaque = malloc(sizeof(struct Inst));
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if (!*opaque)
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{
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DEBUG_INFO("Failed to allocate %lu bytes", sizeof(struct Inst));
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goto fail_config;
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}
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memset(*opaque, 0, sizeof(struct Inst));
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struct Inst * this = (struct Inst *)*opaque;
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if (!font_name)
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font_name = "FreeMono";
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FcPattern * pat = FcNameParse((const FcChar8*)font_name);
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if (!pat)
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{
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DEBUG_ERROR("FCNameParse failed");
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goto fail_opaque;
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}
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FcConfigSubstitute(g_fontConfig, pat, FcMatchPattern);
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FcDefaultSubstitute(pat);
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FcResult result;
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FcChar8 * file = NULL;
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FcPattern * match = FcFontMatch(g_fontConfig, pat, &result);
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if (!match)
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{
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DEBUG_ERROR("FcFontMatch Failed");
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goto fail_parse;
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}
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if (FcPatternGetString(match, FC_FILE, 0, &file) == FcResultMatch)
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{
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if (FT_New_Face(g_ft, (char *) file, 0, &this->face))
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{
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DEBUG_ERROR("FT_New_Face Failed");
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goto fail_match;
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}
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if (FT_Select_Charmap(this->face, ft_encoding_unicode))
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{
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DEBUG_ERROR("FT_Select_Charmap failed");
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FT_Done_Face(this->face);
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goto fail_match;
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}
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FT_Set_Pixel_Sizes(this->face, 0, size);
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this->height = size;
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}
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else
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{
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DEBUG_ERROR("Failed to locate the requested font: %s", font_name);
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goto fail_match;
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}
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++g_initCount;
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ret = true;
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fail_match:
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FcPatternDestroy(match);
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fail_parse:
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FcPatternDestroy(pat);
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if (ret)
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return true;
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fail_opaque:
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free(this);
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*opaque = NULL;
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fail_config:
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if (g_initCount == 0)
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{
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FcConfigDestroy(g_fontConfig);
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g_fontConfig = NULL;
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}
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fail_init:
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if (g_initCount == 0)
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FT_Done_FreeType(g_ft);
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fail:
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return false;
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}
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static void lgf_freetype_destroy(LG_FontObj opaque)
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{
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struct Inst * this = (struct Inst *)opaque;
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if (this->face)
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FT_Done_Face(this->face);
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free(this);
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if (--g_initCount == 0)
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{
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FcConfigDestroy(g_fontConfig);
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g_fontConfig = NULL;
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FT_Done_FreeType(g_ft);
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}
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}
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// A very simple UTF-8 decoder that assumes the input is valid.
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static unsigned int utf8_decode(const char * str)
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{
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const unsigned char * ptr = (const unsigned char *) str;
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// Handle the 4 byte case: 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx.
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if ((*ptr & 0xf8) == 0xf0)
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return (ptr[0] & 0x07) << 18 | (ptr[1] & 0x3f) << 12 | (ptr[2] & 0x3f) << 6 | (ptr[3] & 0x3f);
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// Handle the 3 byte case: 1110 xxxx 10xx xxxx 10xx xxxx.
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else if ((*ptr & 0xf0) == 0xe0)
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return (ptr[0] & 0x0f) << 12 | (ptr[1] & 0x3f) << 6 | (ptr[2] & 0x3f);
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// Handle the 2 byte case: 110x xxxx 10xx xxxx.
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else if ((*ptr & 0xe0) == 0xc0)
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return (ptr[0] & 0x1f) << 6 | (ptr[1] & 0x3f);
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// Everything else is the 1 byte case.
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else
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return *ptr;
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}
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// Return the length of the current UTF-8 character. Assumes the input is valid.
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static unsigned int utf8_advance(const char * str)
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{
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const unsigned char * ptr = (const unsigned char *) str;
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// 4 byte case starts with 1111 0xxx.
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if ((*ptr & 0xf8) == 0xf0)
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return 4;
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// 3 byte case starts with 1110 xxxx.
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else if ((*ptr & 0xf0) == 0xe0)
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return 3;
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// 2 byte case starts with 110x xxxx.
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else if ((*ptr & 0xe0) == 0xc0)
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return 2;
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// Everything else is the 1 byte case.
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else
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return 1;
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}
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static LG_FontBitmap * lgf_freetype_render(LG_FontObj opaque, unsigned int fg_color, const char * text)
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{
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struct Inst * this = (struct Inst *)opaque;
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int width = 0;
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int row = 0;
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int rowWidth = 0;
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int topAscend = 0;
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int bottomDescend = 0;
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for (const char * ptr = text; *ptr; ptr += utf8_advance(ptr))
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{
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unsigned int ch = utf8_decode(ptr);
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if (ch == '\n')
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{
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if (!ptr[1])
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break;
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if (rowWidth > width)
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width = rowWidth;
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rowWidth = bottomDescend = 0;
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++row;
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}
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else if (FT_Load_Char(this->face, ch, FT_LOAD_RENDER))
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{
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DEBUG_ERROR("Failed to load character: %c", *ptr);
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return NULL;
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}
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else
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{
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FT_GlyphSlot glyph = this->face->glyph;
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rowWidth += glyph->advance.x / 64;
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int descend = glyph->bitmap.rows - glyph->bitmap_top;
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if (descend > bottomDescend)
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bottomDescend = descend;
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if (row == 0 && glyph->bitmap_top > topAscend)
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topAscend = glyph->bitmap_top;
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}
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}
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if (rowWidth > width)
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width = rowWidth;
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int height = topAscend + this->height * row + bottomDescend;
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uint32_t * pixels = calloc(width * height, sizeof(uint32_t));
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if (!pixels)
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{
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DEBUG_ERROR("Failed to allocate memory for font pixels");
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return NULL;
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}
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int baseline = topAscend;
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int x = 0;
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unsigned int r = (fg_color & 0xff000000) >> 24;
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unsigned int g = (fg_color & 0x00ff0000) >> 16;
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unsigned int b = (fg_color & 0x0000ff00) >> 8;
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uint32_t color = (r << 0) | (g << 8) | (b << 16);
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for (const char * ptr = text; *ptr; ptr += utf8_advance(ptr))
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{
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unsigned int ch = utf8_decode(ptr);
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if (ch == '\n')
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{
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baseline += this->height;
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x = 0;
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}
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else if (FT_Load_Char(this->face, ch, FT_LOAD_RENDER))
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{
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DEBUG_ERROR("Failed to load character: U+%x", ch);
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return NULL;
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}
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else
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{
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FT_GlyphSlot glyph = this->face->glyph;
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int start = baseline - glyph->bitmap_top;
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int pitch = width;
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if (glyph->bitmap.pitch < 0)
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{
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start += glyph->bitmap.rows - 1;
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pitch = -pitch;
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}
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for (int i = 0; i < glyph->bitmap.rows; ++i)
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for (int j = 0; j < glyph->bitmap.width; ++j)
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pixels[(start + i) * pitch + x + j + glyph->bitmap_left] = color |
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(uint32_t)glyph->bitmap.buffer[i * glyph->bitmap.pitch + j] << 24;
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x += glyph->advance.x / 64;
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}
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}
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LG_FontBitmap * out = malloc(sizeof(LG_FontBitmap));
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if (!out)
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{
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free(pixels);
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DEBUG_ERROR("Failed to allocate memory for font bitmap");
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return NULL;
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}
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out->width = width;
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out->height = height;
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out->bpp = 4;
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out->pixels = (uint8_t *) pixels;
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return out;
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}
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static void lgf_freetype_release(LG_FontObj opaque, LG_FontBitmap * font)
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{
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LG_FontBitmap * bitmap = (LG_FontBitmap *)font;
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free(bitmap->pixels);
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free(bitmap);
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}
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struct LG_Font LGF_freetype =
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{
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.name = "freetype",
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.create = lgf_freetype_create,
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.destroy = lgf_freetype_destroy,
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.render = lgf_freetype_render,
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.release = lgf_freetype_release
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};
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@ -54,7 +54,6 @@ target_link_libraries(renderer_EGL
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${RENDERER_EGL_PKGCONFIG_LIBRARIES}
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${RENDERER_EGL_OPT_PKGCONFIG_LIBRARIES}
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lg_common
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fonts
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cimgui
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)
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@ -16,7 +16,6 @@ target_compile_definitions(renderer_OpenGL PRIVATE CIMGUI_DEFINE_ENUMS_AND_STRUC
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target_link_libraries(renderer_OpenGL
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${RENDERER_OPENGL_PKGCONFIG_LIBRARIES}
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lg_common
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fonts
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cimgui
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)
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