[client] fonts: remove font rendering machinery

This commit is contained in:
Quantum 2021-07-23 06:10:56 -04:00 committed by Geoffrey McRae
parent 0c35d9b057
commit f09738678e
6 changed files with 5 additions and 396 deletions

View File

@ -17,6 +17,9 @@ else()
add_compile_options("-march=nehalem" "-mtune=generic") add_compile_options("-march=nehalem" "-mtune=generic")
endif() endif()
find_package(PkgConfig)
pkg_check_modules(FONTCONFIG_PKGCONFIG REQUIRED fontconfig)
option(ENABLE_OPENGL "Enable the OpenGL renderer" ON) option(ENABLE_OPENGL "Enable the OpenGL renderer" ON)
add_feature_info(ENABLE_OPENGL ENABLE_OPENGL "Legacy OpenGL renderer.") add_feature_info(ENABLE_OPENGL ENABLE_OPENGL "Legacy OpenGL renderer.")
@ -97,6 +100,7 @@ include_directories(
${PROJECT_SOURCE_DIR}/include ${PROJECT_SOURCE_DIR}/include
${CMAKE_BINARY_DIR}/include ${CMAKE_BINARY_DIR}/include
${GMP_INCLUDE_DIR} ${GMP_INCLUDE_DIR}
${FONTCONFIG_PKGCONFIG_INCLUDE_DIRS}
) )
link_libraries( link_libraries(
@ -139,7 +143,6 @@ add_subdirectory("${PROJECT_TOP}/repos/cimgui" "${CMAKE_BINARY_DIR}/cimgui"
add_subdirectory(displayservers) add_subdirectory(displayservers)
add_subdirectory(renderers) add_subdirectory(renderers)
add_subdirectory(fonts)
add_executable(looking-glass-client ${SOURCES}) add_executable(looking-glass-client ${SOURCES})
@ -147,12 +150,12 @@ target_compile_definitions(looking-glass-client PRIVATE CIMGUI_DEFINE_ENUMS_AND_
target_link_libraries(looking-glass-client target_link_libraries(looking-glass-client
${EXE_FLAGS} ${EXE_FLAGS}
${FONTCONFIG_PKGCONFIG_LIBRARIES}
lg_common lg_common
displayservers displayservers
lgmp lgmp
purespice purespice
renderers renderers
fonts
cimgui cimgui
) )

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@ -1,41 +0,0 @@
cmake_minimum_required(VERSION 3.0)
project(fonts LANGUAGES C)
set(FONT_H "${CMAKE_BINARY_DIR}/include/dynamic/fonts.h")
set(FONT_C "${CMAKE_BINARY_DIR}/src/fonts.c")
file(WRITE ${FONT_H} "#include \"interface/font.h\"\n\n")
file(APPEND ${FONT_H} "extern LG_Font * LG_Fonts[];\n\n")
file(WRITE ${FONT_C} "#include \"interface/font.h\"\n\n")
file(APPEND ${FONT_C} "#include <stddef.h>\n\n")
set(FONTS "_")
set(FONTS_LINK "_")
function(add_font name)
set(FONTS "${FONTS};${name}" PARENT_SCOPE)
set(FONTS_LINK "${FONTS_LINK};font_${name}" PARENT_SCOPE)
add_subdirectory(${name})
endfunction()
# Add/remove fonts here!
add_font(freetype)
list(REMOVE_AT FONTS 0)
list(REMOVE_AT FONTS_LINK 0)
list(LENGTH FONTS FONT_COUNT)
file(APPEND ${FONT_H} "#define LG_FONT_COUNT ${FONT_COUNT}\n")
foreach(font ${FONTS})
file(APPEND ${FONT_C} "extern LG_Font LGF_${font};\n")
endforeach()
file(APPEND ${FONT_C} "\nconst LG_Font * LG_Fonts[] =\n{\n")
foreach(font ${FONTS})
file(APPEND ${FONT_C} " &LGF_${font},\n")
endforeach()
file(APPEND ${FONT_C} " NULL\n};\n\n")
add_library(fonts STATIC ${FONT_C})
target_link_libraries(fonts ${FONTS_LINK})

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@ -1,26 +0,0 @@
cmake_minimum_required(VERSION 3.0)
project(font_freetype LANGUAGES C)
find_package(PkgConfig)
pkg_check_modules(FONT_FREETYPE_PKGCONFIG REQUIRED
freetype2
fontconfig
)
add_library(font_freetype STATIC
src/freetype.c
)
target_link_libraries(font_freetype
${FONT_FREETYPE_PKGCONFIG_LIBRARIES}
lg_common
)
target_include_directories(font_freetype
PUBLIC
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
$<INSTALL_INTERFACE:include>
PRIVATE
src
${FONT_FREETYPE_PKGCONFIG_INCLUDE_DIRS}
)

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@ -1,325 +0,0 @@
/**
* Looking Glass
* Copyright (C) 2017-2021 The Looking Glass Authors
* https://looking-glass.io
*
* 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, write to the Free Software Foundation, Inc., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdbool.h>
#include "interface/font.h"
#include "common/debug.h"
#include <ft2build.h>
#include FT_FREETYPE_H
#include <fontconfig/fontconfig.h>
static int g_initCount = 0;
static FcConfig * g_fontConfig = NULL;
static FT_Library g_ft;
struct Inst
{
FT_Face face;
unsigned int height;
};
static bool lgf_freetype_create(LG_FontObj * opaque, const char * font_name, unsigned int size)
{
bool ret = false;
if (g_initCount == 0)
{
if (FT_Init_FreeType(&g_ft))
{
DEBUG_ERROR("FT_Init_FreeType Failed");
goto fail;
}
g_fontConfig = FcInitLoadConfigAndFonts();
if (!g_fontConfig)
{
DEBUG_ERROR("FcInitLoadConfigAndFonts Failed");
goto fail_init;
}
}
*opaque = malloc(sizeof(struct Inst));
if (!*opaque)
{
DEBUG_INFO("Failed to allocate %lu bytes", sizeof(struct Inst));
goto fail_config;
}
memset(*opaque, 0, sizeof(struct Inst));
struct Inst * this = (struct Inst *)*opaque;
if (!font_name)
font_name = "FreeMono";
FcPattern * pat = FcNameParse((const FcChar8*)font_name);
if (!pat)
{
DEBUG_ERROR("FCNameParse failed");
goto fail_opaque;
}
FcConfigSubstitute(g_fontConfig, pat, FcMatchPattern);
FcDefaultSubstitute(pat);
FcResult result;
FcChar8 * file = NULL;
FcPattern * match = FcFontMatch(g_fontConfig, pat, &result);
if (!match)
{
DEBUG_ERROR("FcFontMatch Failed");
goto fail_parse;
}
if (FcPatternGetString(match, FC_FILE, 0, &file) == FcResultMatch)
{
if (FT_New_Face(g_ft, (char *) file, 0, &this->face))
{
DEBUG_ERROR("FT_New_Face Failed");
goto fail_match;
}
if (FT_Select_Charmap(this->face, ft_encoding_unicode))
{
DEBUG_ERROR("FT_Select_Charmap failed");
FT_Done_Face(this->face);
goto fail_match;
}
FT_Set_Pixel_Sizes(this->face, 0, size);
this->height = size;
}
else
{
DEBUG_ERROR("Failed to locate the requested font: %s", font_name);
goto fail_match;
}
++g_initCount;
ret = true;
fail_match:
FcPatternDestroy(match);
fail_parse:
FcPatternDestroy(pat);
if (ret)
return true;
fail_opaque:
free(this);
*opaque = NULL;
fail_config:
if (g_initCount == 0)
{
FcConfigDestroy(g_fontConfig);
g_fontConfig = NULL;
}
fail_init:
if (g_initCount == 0)
FT_Done_FreeType(g_ft);
fail:
return false;
}
static void lgf_freetype_destroy(LG_FontObj opaque)
{
struct Inst * this = (struct Inst *)opaque;
if (this->face)
FT_Done_Face(this->face);
free(this);
if (--g_initCount == 0)
{
FcConfigDestroy(g_fontConfig);
g_fontConfig = NULL;
FT_Done_FreeType(g_ft);
}
}
// A very simple UTF-8 decoder that assumes the input is valid.
static unsigned int utf8_decode(const char * str)
{
const unsigned char * ptr = (const unsigned char *) str;
// Handle the 4 byte case: 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx.
if ((*ptr & 0xf8) == 0xf0)
return (ptr[0] & 0x07) << 18 | (ptr[1] & 0x3f) << 12 | (ptr[2] & 0x3f) << 6 | (ptr[3] & 0x3f);
// Handle the 3 byte case: 1110 xxxx 10xx xxxx 10xx xxxx.
else if ((*ptr & 0xf0) == 0xe0)
return (ptr[0] & 0x0f) << 12 | (ptr[1] & 0x3f) << 6 | (ptr[2] & 0x3f);
// Handle the 2 byte case: 110x xxxx 10xx xxxx.
else if ((*ptr & 0xe0) == 0xc0)
return (ptr[0] & 0x1f) << 6 | (ptr[1] & 0x3f);
// Everything else is the 1 byte case.
else
return *ptr;
}
// Return the length of the current UTF-8 character. Assumes the input is valid.
static unsigned int utf8_advance(const char * str)
{
const unsigned char * ptr = (const unsigned char *) str;
// 4 byte case starts with 1111 0xxx.
if ((*ptr & 0xf8) == 0xf0)
return 4;
// 3 byte case starts with 1110 xxxx.
else if ((*ptr & 0xf0) == 0xe0)
return 3;
// 2 byte case starts with 110x xxxx.
else if ((*ptr & 0xe0) == 0xc0)
return 2;
// Everything else is the 1 byte case.
else
return 1;
}
static LG_FontBitmap * lgf_freetype_render(LG_FontObj opaque, unsigned int fg_color, const char * text)
{
struct Inst * this = (struct Inst *)opaque;
int width = 0;
int row = 0;
int rowWidth = 0;
int topAscend = 0;
int bottomDescend = 0;
for (const char * ptr = text; *ptr; ptr += utf8_advance(ptr))
{
unsigned int ch = utf8_decode(ptr);
if (ch == '\n')
{
if (!ptr[1])
break;
if (rowWidth > width)
width = rowWidth;
rowWidth = bottomDescend = 0;
++row;
}
else if (FT_Load_Char(this->face, ch, FT_LOAD_RENDER))
{
DEBUG_ERROR("Failed to load character: %c", *ptr);
return NULL;
}
else
{
FT_GlyphSlot glyph = this->face->glyph;
rowWidth += glyph->advance.x / 64;
int descend = glyph->bitmap.rows - glyph->bitmap_top;
if (descend > bottomDescend)
bottomDescend = descend;
if (row == 0 && glyph->bitmap_top > topAscend)
topAscend = glyph->bitmap_top;
}
}
if (rowWidth > width)
width = rowWidth;
int height = topAscend + this->height * row + bottomDescend;
uint32_t * pixels = calloc(width * height, sizeof(uint32_t));
if (!pixels)
{
DEBUG_ERROR("Failed to allocate memory for font pixels");
return NULL;
}
int baseline = topAscend;
int x = 0;
unsigned int r = (fg_color & 0xff000000) >> 24;
unsigned int g = (fg_color & 0x00ff0000) >> 16;
unsigned int b = (fg_color & 0x0000ff00) >> 8;
uint32_t color = (r << 0) | (g << 8) | (b << 16);
for (const char * ptr = text; *ptr; ptr += utf8_advance(ptr))
{
unsigned int ch = utf8_decode(ptr);
if (ch == '\n')
{
baseline += this->height;
x = 0;
}
else if (FT_Load_Char(this->face, ch, FT_LOAD_RENDER))
{
DEBUG_ERROR("Failed to load character: U+%x", ch);
return NULL;
}
else
{
FT_GlyphSlot glyph = this->face->glyph;
int start = baseline - glyph->bitmap_top;
int pitch = width;
if (glyph->bitmap.pitch < 0)
{
start += glyph->bitmap.rows - 1;
pitch = -pitch;
}
for (int i = 0; i < glyph->bitmap.rows; ++i)
for (int j = 0; j < glyph->bitmap.width; ++j)
pixels[(start + i) * pitch + x + j + glyph->bitmap_left] = color |
(uint32_t)glyph->bitmap.buffer[i * glyph->bitmap.pitch + j] << 24;
x += glyph->advance.x / 64;
}
}
LG_FontBitmap * out = malloc(sizeof(LG_FontBitmap));
if (!out)
{
free(pixels);
DEBUG_ERROR("Failed to allocate memory for font bitmap");
return NULL;
}
out->width = width;
out->height = height;
out->bpp = 4;
out->pixels = (uint8_t *) pixels;
return out;
}
static void lgf_freetype_release(LG_FontObj opaque, LG_FontBitmap * font)
{
LG_FontBitmap * bitmap = (LG_FontBitmap *)font;
free(bitmap->pixels);
free(bitmap);
}
struct LG_Font LGF_freetype =
{
.name = "freetype",
.create = lgf_freetype_create,
.destroy = lgf_freetype_destroy,
.render = lgf_freetype_render,
.release = lgf_freetype_release
};

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@ -54,7 +54,6 @@ target_link_libraries(renderer_EGL
${RENDERER_EGL_PKGCONFIG_LIBRARIES} ${RENDERER_EGL_PKGCONFIG_LIBRARIES}
${RENDERER_EGL_OPT_PKGCONFIG_LIBRARIES} ${RENDERER_EGL_OPT_PKGCONFIG_LIBRARIES}
lg_common lg_common
fonts
cimgui cimgui
) )

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@ -16,7 +16,6 @@ target_compile_definitions(renderer_OpenGL PRIVATE CIMGUI_DEFINE_ENUMS_AND_STRUC
target_link_libraries(renderer_OpenGL target_link_libraries(renderer_OpenGL
${RENDERER_OPENGL_PKGCONFIG_LIBRARIES} ${RENDERER_OPENGL_PKGCONFIG_LIBRARIES}
lg_common lg_common
fonts
cimgui cimgui
) )