[client] use cmake to generate renderers/fonts/clipboards headers/code

This is in preperation of cmake options to enable/disable various
functionallity.

client/fonts/SDL/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.0)
+project(font_SDL LANGUAGES C)
+
+find_package(PkgConfig)
+pkg_check_modules(FONT_SDL_PKGCONFIG REQUIRED
+	SDL2_ttf
+	fontconfig
+)
+
+add_library(font_SDL STATIC
+	src/sdl.c
+)
+
+target_link_libraries(font_SDL
+	${FONT_SDL_PKGCONFIG_LIBRARIES}
+)
+
+target_include_directories(font_SDL
+	PUBLIC
+		$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+		$<INSTALL_INTERFACE:include>
+	PRIVATE
+		src
+		${FONT_SDL_PKGCONFIG_INCLUDE_DIRS}
+)

client/fonts/SDL/src/sdl.c

@@ -0,0 +1,153 @@
+/*
+Looking Glass - KVM FrameRelay (KVMFR) Client
+Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
+https://looking-glass.hostfission.com
+
+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 "debug.h"
+
+#include <SDL2/SDL_ttf.h>
+#include <fontconfig/fontconfig.h>
+
+static int        g_initCount  = 0;
+static FcConfig * g_fontConfig = NULL;
+
+struct Inst
+{
+  TTF_Font * font;
+};
+
+static bool lgf_sdl_create(LG_FontObj * opaque, const char * font_name, unsigned int size)
+{
+  if (g_initCount++ == 0)
+  {
+    if (TTF_Init() < 0)
+    {
+      DEBUG_ERROR("TTF_Init Failed");
+      return false;
+    }
+
+    g_fontConfig = FcInitLoadConfigAndFonts();
+    if (!g_fontConfig)
+    {
+      DEBUG_ERROR("FcInitLoadConfigAndFonts Failed");
+      return false;
+    }
+  }
+
+  *opaque = malloc(sizeof(struct Inst));
+  if (!*opaque)
+  {
+    DEBUG_INFO("Failed to allocate %lu bytes", sizeof(struct Inst));
+    return false;
+  }
+  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);
+  FcConfigSubstitute (g_fontConfig, pat, FcMatchPattern);
+  FcDefaultSubstitute(pat);
+  FcResult result;
+  FcChar8 * file = NULL;
+  FcPattern * font = FcFontMatch(g_fontConfig, pat, &result);
+
+  if (font && (FcPatternGetString(font, FC_FILE, 0, &file) == FcResultMatch))
+  {
+    this->font = TTF_OpenFont((char *)file, size);
+    if (!this->font)
+    {
+      DEBUG_ERROR("TTL_OpenFont Failed");
+      return false;
+    }
+  }
+  else
+  {
+    DEBUG_ERROR("Failed to locate the requested font: %s", font_name);
+    return false;
+  }
+  FcPatternDestroy(pat);
+
+  return true;
+}
+
+static void lgf_sdl_destroy(LG_FontObj opaque)
+{
+  struct Inst * this = (struct Inst *)opaque;
+  if (this->font)
+    TTF_CloseFont(this->font);
+  free(this);
+
+  if (--g_initCount == 0)
+    TTF_Quit();
+}
+
+static LG_FontBitmap * lgf_sdl_render(LG_FontObj opaque, unsigned int fg_color, const char * text)
+{
+  struct Inst * this = (struct Inst *)opaque;
+
+  SDL_Surface * surface;
+  SDL_Color     color;
+  color.r = (fg_color & 0xff000000) >> 24;
+  color.g = (fg_color & 0x00ff0000) >> 16;
+  color.b = (fg_color & 0x0000ff00) >>  8;
+  color.a = (fg_color & 0x000000ff) >>  0;
+
+  if (!(surface = TTF_RenderText_Blended(this->font, text, color)))
+  {
+    DEBUG_ERROR("Failed to render text: %s", TTF_GetError());
+    return NULL;
+  }
+
+  LG_FontBitmap * out = malloc(sizeof(LG_FontBitmap));
+  if (!out)
+  {
+    SDL_FreeSurface(surface);
+    DEBUG_ERROR("Failed to allocate memory for font bitmap");
+    return NULL;
+  }
+
+  out->reserved = surface;
+  out->width    = surface->w;
+  out->height   = surface->h;
+  out->bpp      = surface->format->BytesPerPixel;
+  out->pixels   = surface->pixels;
+
+  return out;
+}
+
+static void lgf_sdl_release(LG_FontObj opaque, LG_FontBitmap * font)
+{
+  LG_FontBitmap * bitmap = (LG_FontBitmap *)font;
+  SDL_FreeSurface(bitmap->reserved);
+  free(bitmap);
+}
+
+struct LG_Font LGF_SDL =
+{
+  .name         = "SDL",
+  .create       = lgf_sdl_create,
+  .destroy      = lgf_sdl_destroy,
+  .render       = lgf_sdl_render,
+  .release      = lgf_sdl_release
+};