Remove cairo text-renderer

The cairo text-renderer is _way_ too slow. There's no reason to keep it
around, anymore.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>

6 files changed, 1 insertions, 593 deletions

diff --git a/Makefile.am b/Makefile.am
index 11c2d30..557b944 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -473,25 +473,6 @@ mod_gltex_la_LDFLAGS = \
 	-module \
 	-avoid-version
 
-if BUILD_ENABLE_RENDERER_CAIRO
-module_LTLIBRARIES += mod-cairo.la
-endif
-
-mod_cairo_la_SOURCES = \
-	src/kmscon_module_interface.h \
-	src/text_cairo.c \
-	src/kmscon_mod_cairo.c
-mod_cairo_la_CPPFLAGS = \
-	$(AM_CPPFLAGS) \
-	$(CAIRO_CFLAGS)
-mod_cairo_la_LIBADD = \
-	$(CAIRO_LIBS) \
-	libshl.la
-mod_cairo_la_LDFLAGS = \
-	$(AM_LDFLAGS) \
-	-module \
-	-avoid-version
-
 if BUILD_ENABLE_RENDERER_PIXMAN
 module_LTLIBRARIES += mod-pixman.la
 endif
diff --git a/README b/README
index 244e817..3b3f746 100644
--- a/README
+++ b/README
@@ -80,7 +80,6 @@ Released tarballs can be found at:
     --with-renderers: Console rendering backends. Available are:
        - bbulk: Simple 2D software-renderer (bulk-mode)
        - gltex: OpenGLESv2 accelerated renderer
-       - cairo: cairo based renderer
        - pixman: pixman based renderer
        Default is: bbulk,gltex
        The bblit backend is always built-in.
diff --git a/configure.ac b/configure.ac
index 01ae4fc..f6783ca 100644
--- a/configure.ac
+++ b/configure.ac
@@ -100,11 +100,6 @@ PKG_CHECK_MODULES([PANGO], [pango pangoft2],
 AC_SUBST(PANGO_CFLAGS)
 AC_SUBST(PANGO_LIBS)
 
-PKG_CHECK_MODULES([CAIRO], [cairo],
-                  [have_cairo=yes], [have_cairo=no])
-AC_SUBST(CAIRO_CFLAGS)
-AC_SUBST(CAIRO_LIBS)
-
 PKG_CHECK_MODULES([PIXMAN], [pixman-1],
                   [have_pixman=yes], [have_pixman=no])
 AC_SUBST(PIXMAN_CFLAGS)
@@ -276,18 +271,15 @@ AC_ARG_WITH([renderers],
             [with_renderers="default"])
 enable_renderer_bbulk="no"
 enable_renderer_gltex="no"
-enable_renderer_cairo="no"
 enable_renderer_pixman="no"
 if test "x$enable_all" = "xyes" ; then
         enable_renderer_bbulk="yes"
         enable_renderer_gltex="yes"
-        enable_renderer_cairo="yes"
         enable_renderer_pixman="yes"
-        with_renderers="bbulk,gltex,cairo,pixman (all)"
+        with_renderers="bbulk,gltex,pixman (all)"
 elif test "x$with_renderers" = "xdefault" ; then
         enable_renderer_bbulk="yes (default)"
         enable_renderer_gltex="yes (default)"
-        enable_renderer_cairo="no (default)"
         enable_renderer_pixman="no (default)"
         with_renderers="bbulk,gltex (default)"
 elif test ! "x$with_renderers" = "x" ; then
@@ -298,8 +290,6 @@ elif test ! "x$with_renderers" = "x" ; then
                         enable_renderer_bbulk="yes"
                 elif test "x$i" = "xgltex" ; then
                         enable_renderer_gltex="yes"
-                elif test "x$i" = "xcairo" ; then
-                        enable_renderer_cairo="yes"
                 elif test "x$i" = "xpixman" ; then
                         enable_renderer_pixman="yes"
                 else
@@ -566,25 +556,6 @@ else
         renderer_gltex_missing="enable-renderer-gltex"
 fi
 
-# renderer cairo
-renderer_cairo_avail=no
-renderer_cairo_missing=""
-if test ! "x$enable_renderer_cairo" = "xno" ; then
-        renderer_cairo_avail=yes
-        if test "x$have_cairo" = "xno" ; then
-                renderer_cairo_avail=no
-                renderer_cairo_missing="cairo"
-        fi
-
-        if test "x$renderer_cairo_avail" = "xno" ; then
-                if test "x$enable_renderer_cairo" = "xyes" ; then
-                        AC_ERROR([missing for renderer-cairo: $renderer_cairo_missing])
-                fi
-        fi
-else
-        renderer_cairo_missing="enable-renderer-cairo"
-fi
-
 # renderer pixman
 renderer_pixman_avail=no
 renderer_pixman_missing=""
@@ -747,14 +718,6 @@ if test "x$renderer_gltex_avail" = "xyes" ; then
         fi
 fi
 
-# renderer cairo
-renderer_cairo_enabled=no
-if test "x$renderer_cairo_avail" = "xyes" ; then
-        if test "x${enable_renderer_cairo% *}" = "xyes" ; then
-                renderer_cairo_enabled=yes
-        fi
-fi
-
 # renderer pixman
 renderer_pixman_enabled=no
 if test "x$renderer_pixman_avail" = "xyes" ; then
@@ -948,15 +911,6 @@ fi
 AM_CONDITIONAL([BUILD_ENABLE_RENDERER_GLTEX],
                [test "x$renderer_gltex_enabled" = "xyes"])
 
-# renderer cairo
-if test "x$renderer_cairo_enabled" = "xyes" ; then
-        AC_DEFINE([BUILD_ENABLE_RENDERER_CAIRO], [1],
-                  [Build cairo rendering backend])
-fi
-
-AM_CONDITIONAL([BUILD_ENABLE_RENDERER_CAIRO],
-               [test "x$renderer_cairo_enabled" = "xyes"])
-
 # renderer pixman
 if test "x$renderer_pixman_enabled" = "xyes" ; then
         AC_DEFINE([BUILD_ENABLE_RENDERER_PIXMAN], [1],
@@ -1109,7 +1063,6 @@ AC_MSG_NOTICE([Build configuration:
   Renderers:
                 bbulk: $renderer_bbulk_enabled ($renderer_bbulk_avail: $renderer_bbulk_missing)
                 gltex: $renderer_gltex_enabled ($renderer_gltex_avail: $renderer_gltex_missing)
-                cairo: $renderer_cairo_enabled ($renderer_cairo_avail: $renderer_cairo_missing)
                pixman: $renderer_pixman_enabled ($renderer_pixman_avail: $renderer_pixman_missing)
 
   Session Types:
diff --git a/src/kmscon_mod_cairo.c b/src/kmscon_mod_cairo.c
deleted file mode 100644
index ecdcf62..0000000
--- a/src/kmscon_mod_cairo.c
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * kmscon - Cairo based rendering backend module
- *
- * Copyright (c) 2012-2013 David Herrmann <dh.herrmann@googlemail.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files
- * (the "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/*
- * Cairo based rendering backend
- */
-
-#include <errno.h>
-#include <stdlib.h>
-#include "text.h"
-#include "kmscon_module_interface.h"
-#include "shl_log.h"
-
-#define LOG_SUBSYSTEM "mod_cairo"
-
-static int kmscon_cairo_load(void)
-{
-	int ret;
-
-	kmscon_text_cairo_ops.owner = KMSCON_THIS_MODULE;
-	ret = kmscon_text_register(&kmscon_text_cairo_ops);
-	if (ret) {
-		log_error("cannot register cairo renderer");
-		return ret;
-	}
-
-	return 0;
-}
-
-static void kmscon_cairo_unload(void)
-{
-	kmscon_text_unregister(kmscon_text_cairo_ops.name);
-}
-
-KMSCON_MODULE(NULL, kmscon_cairo_load, kmscon_cairo_unload, NULL);
diff --git a/src/text.h b/src/text.h
index bc02c5b..902e3cd 100644
--- a/src/text.h
+++ b/src/text.h
@@ -112,7 +112,6 @@ int kmscon_text_draw_cb(struct tsm_screen *con,
 extern struct kmscon_text_ops kmscon_text_bblit_ops;
 extern struct kmscon_text_ops kmscon_text_bbulk_ops;
 extern struct kmscon_text_ops kmscon_text_gltex_ops;
-extern struct kmscon_text_ops kmscon_text_cairo_ops;
 extern struct kmscon_text_ops kmscon_text_pixman_ops;
 
 #endif /* KMSCON_TEXT_H */
diff --git a/src/text_cairo.c b/src/text_cairo.c
deleted file mode 100644
index 715bfb4..0000000
--- a/src/text_cairo.c
+++ /dev/null
@@ -1,467 +0,0 @@
-/*
- * kmscon - Cairo Text Renderer Backend
- *
- * Copyright (c) 2012-2013 David Herrmann <dh.herrmann@googlemail.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files
- * (the "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/*
- * Cairo based text renderer
- */
-
-#include <cairo.h>
-#include <errno.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-#include "shl_hashtable.h"
-#include "shl_log.h"
-#include "text.h"
-#include "uterm_video.h"
-
-#define LOG_SUBSYSTEM "text_cairo"
-
-struct tc_glyph {
-	const struct kmscon_glyph *glyph;
-	cairo_surface_t *surf;
-	uint8_t *data;
-};
-
-struct tc_cairo {
-	struct shl_hashtable *glyphs;
-	struct shl_hashtable *bold_glyphs;
-
-	bool new_stride;
-	unsigned int cur;
-	struct uterm_video_buffer buf[2];
-	cairo_surface_t *surf[2];
-	cairo_t *ctx[2];
-
-	bool use_indirect;
-	uint8_t *data[2];
-	struct uterm_video_buffer vbuf;
-};
-
-static int tc_init(struct kmscon_text *txt)
-{
-	struct tc_cairo *tc;
-
-	tc = malloc(sizeof(*tc));
-	if (!tc)
-		return -ENOMEM;
-
-	txt->data = tc;
-	return 0;
-}
-
-static void tc_destroy(struct kmscon_text *txt)
-{
-	struct tc_cairo *tc = txt->data;
-
-	free(tc);
-}
-
-static void free_glyph(void *data)
-{
-	struct tc_glyph *glyph = data;
-
-	cairo_surface_destroy(glyph->surf);
-	free(glyph->data);
-	free(glyph);
-}
-
-static unsigned int format_u2c(unsigned int f)
-{
-	switch (f) {
-	case UTERM_FORMAT_XRGB32:
-		return CAIRO_FORMAT_ARGB32;
-	case UTERM_FORMAT_RGB16:
-		return CAIRO_FORMAT_RGB16_565;
-	case UTERM_FORMAT_GREY:
-		return CAIRO_FORMAT_A8;
-	default:
-		return CAIRO_FORMAT_INVALID;
-	}
-}
-
-static int alloc_indirect(struct kmscon_text *txt,
-			  unsigned int w, unsigned int h)
-{
-	struct tc_cairo *tc = txt->data;
-	unsigned int s, i, format;
-	int ret;
-
-	log_info("using blitting engine");
-
-	format = format_u2c(UTERM_FORMAT_XRGB32);
-	s = cairo_format_stride_for_width(format, w);
-
-	tc->data[0] = malloc(s * h);
-	tc->data[1] = malloc(s * h);
-	if (!tc->data[0] || !tc->data[1]) {
-		log_error("cannot allocate memory for render-buffer");
-		ret = -ENOMEM;
-		goto err_free;
-	}
-
-	for (i = 0; i < 2; ++i) {
-		tc->surf[i] = cairo_image_surface_create_for_data(tc->data[i],
-								  format,
-								  w, h, s);
-
-		ret = cairo_surface_status(tc->surf[i]);
-		if (ret != CAIRO_STATUS_SUCCESS) {
-			log_error("cannot create cairo surface: %d", ret);
-			goto err_cairo;
-		}
-	}
-
-	tc->vbuf.width = w;
-	tc->vbuf.height = h;
-	tc->vbuf.stride = s;
-	tc->vbuf.format = UTERM_FORMAT_XRGB32;
-	tc->use_indirect = true;
-	return 0;
-
-err_cairo:
-	cairo_surface_destroy(tc->surf[1]);
-	cairo_surface_destroy(tc->surf[0]);
-err_free:
-	free(tc->data[1]);
-	free(tc->data[0]);
-	tc->data[1] = NULL;
-	tc->data[0] = NULL;
-	return ret;
-}
-
-static int tc_set(struct kmscon_text *txt)
-{
-	struct tc_cairo *tc = txt->data;
-	int ret, ret2;
-	unsigned int format, w, h;
-	struct uterm_mode *m;
-
-	memset(tc, 0, sizeof(*tc));
-	m = uterm_display_get_current(txt->disp);
-	w = uterm_mode_get_width(m);
-	h = uterm_mode_get_height(m);
-
-	ret = shl_hashtable_new(&tc->glyphs, shl_direct_hash,
-				shl_direct_equal, NULL,
-				free_glyph);
-	if (ret)
-		return ret;
-
-	ret = shl_hashtable_new(&tc->bold_glyphs, shl_direct_hash,
-				shl_direct_equal, NULL,
-				free_glyph);
-	if (ret)
-		goto err_htable;
-
-	/*
-	 * TODO: It is actually faster to use a local shadow buffer and then
-	 * blit all data to the framebuffer afterwards. Reads seem to be
-	 * horribly slow on some mmap'ed framebuffers. However, that's not true
-	 * for all so we actually don't know which to use here.
-	 */
-	ret = uterm_display_get_buffers(txt->disp, tc->buf,
-					UTERM_FORMAT_XRGB32 |
-					UTERM_FORMAT_RGB16);
-	if (ret) {
-		log_warning("cannot get buffers for display %p",
-			    txt->disp);
-		ret = alloc_indirect(txt, w, h);
-		if (ret)
-			goto err_htable_bold;
-	} else {
-		format = format_u2c(tc->buf[0].format);
-		tc->surf[0] = cairo_image_surface_create_for_data(
-							tc->buf[0].data,
-							format,
-							tc->buf[0].width,
-							tc->buf[0].height,
-							tc->buf[0].stride);
-		format = format_u2c(tc->buf[1].format);
-		tc->surf[1] = cairo_image_surface_create_for_data(
-							tc->buf[1].data,
-							format,
-							tc->buf[1].width,
-							tc->buf[1].height,
-							tc->buf[1].stride);
-
-		ret = cairo_surface_status(tc->surf[0]);
-		ret2 = cairo_surface_status(tc->surf[1]);
-		if (ret != CAIRO_STATUS_SUCCESS ||
-		    ret2 != CAIRO_STATUS_SUCCESS) {
-			log_error("cannot create cairo surface: %d %d",
-				  ret, ret2);
-			cairo_surface_destroy(tc->surf[1]);
-			cairo_surface_destroy(tc->surf[0]);
-			ret = alloc_indirect(txt, w, h);
-			if (ret)
-				goto err_htable_bold;
-		}
-	}
-
-	tc->ctx[0] = cairo_create(tc->surf[0]);
-	tc->ctx[1] = cairo_create(tc->surf[1]);
-	ret = cairo_status(tc->ctx[0]);
-	ret2 = cairo_status(tc->ctx[1]);
-	if (ret != CAIRO_STATUS_SUCCESS || ret2 != CAIRO_STATUS_SUCCESS) {
-		log_error("cannot create cairo contexts: %d %d", ret, ret2);
-		goto err_ctx;
-	}
-
-	txt->cols = w / txt->font->attr.width;
-	txt->rows = h / txt->font->attr.height;
-
-	return 0;
-
-err_ctx:
-	cairo_destroy(tc->ctx[1]);
-	cairo_destroy(tc->ctx[0]);
-	cairo_surface_destroy(tc->surf[1]);
-	cairo_surface_destroy(tc->surf[0]);
-	free(tc->data[1]);
-	free(tc->data[0]);
-err_htable_bold:
-	shl_hashtable_free(tc->bold_glyphs);
-err_htable:
-	shl_hashtable_free(tc->glyphs);
-	return ret;
-}
-
-static void tc_unset(struct kmscon_text *txt)
-{
-	struct tc_cairo *tc = txt->data;
-
-	cairo_destroy(tc->ctx[1]);
-	cairo_destroy(tc->ctx[0]);
-	cairo_surface_destroy(tc->surf[1]);
-	cairo_surface_destroy(tc->surf[0]);
-	free(tc->data[1]);
-	free(tc->data[0]);
-	shl_hashtable_free(tc->bold_glyphs);
-	shl_hashtable_free(tc->glyphs);
-}
-
-static int find_glyph(struct kmscon_text *txt, struct tc_glyph **out,
-		      uint32_t id, const uint32_t *ch, size_t len, bool bold)
-{
-	struct tc_cairo *tc = txt->data;
-	struct tc_glyph *glyph;
-	struct shl_hashtable *gtable;
-	struct kmscon_font *font;
-	const struct uterm_video_buffer *buf;
-	uint8_t *dst, *src;
-	unsigned int format, i;
-	int ret, stride;
-	bool res;
-
-	if (bold) {
-		gtable = tc->bold_glyphs;
-		font = txt->bold_font;
-	} else {
-		gtable = tc->glyphs;
-		font = txt->font;
-	}
-
-	res = shl_hashtable_find(gtable, (void**)&glyph,
-				 (void*)(unsigned long)id);
-	if (res) {
-		*out = glyph;
-		return 0;
-	}
-
-	glyph = malloc(sizeof(*glyph));
-	if (!glyph)
-		return -ENOMEM;
-	memset(glyph, 0, sizeof(*glyph));
-
-	if (!len)
-		ret = kmscon_font_render_empty(font, &glyph->glyph);
-	else
-		ret = kmscon_font_render(font, id, ch, len, &glyph->glyph);
-
-	if (ret) {
-		ret = kmscon_font_render_inval(font, &glyph->glyph);
-		if (ret)
-			goto err_free;
-	}
-
-	buf = &glyph->glyph->buf;
-	stride = buf->stride;
-	format = format_u2c(buf->format);
-	glyph->surf = cairo_image_surface_create_for_data(buf->data,
-							  format,
-							  buf->width,
-							  buf->height,
-							  buf->stride);
-	ret = cairo_surface_status(glyph->surf);
-	if (ret == CAIRO_STATUS_INVALID_STRIDE) {
-		stride = cairo_format_stride_for_width(format, buf->width);
-		if (!tc->new_stride) {
-			tc->new_stride = true;
-			log_debug("wrong stride, copy buffer (%d => %d)",
-			  buf->stride, stride);
-		}
-
-		glyph->data = malloc(stride * buf->height);
-		if (!glyph->data) {
-			log_error("cannot allocate memory for glyph storage");
-			ret = -ENOMEM;
-			goto err_cairo;
-		}
-
-		src = buf->data;
-		dst = glyph->data;
-		for (i = 0; i < buf->height; ++i) {
-			memcpy(dst, src, buf->width);
-			dst += stride;
-			src += buf->stride;
-		}
-
-		cairo_surface_destroy(glyph->surf);
-		glyph->surf = cairo_image_surface_create_for_data(glyph->data,
-								  format,
-								  buf->width,
-								  buf->height,
-								  stride);
-		ret = cairo_surface_status(glyph->surf);
-	}
-	if (ret != CAIRO_STATUS_SUCCESS) {
-		log_error("cannot create cairo-glyph: %d %p %d %d %d %d",
-			  ret, glyph->data ? glyph->data : buf->data, format,
-			  buf->width, buf->height, stride);
-		ret = -EFAULT;
-		goto err_cairo;
-	}
-
-	ret = shl_hashtable_insert(gtable, (void*)(long)id, glyph);
-	if (ret)
-		goto err_cairo;
-
-	*out = glyph;
-	return 0;
-
-err_cairo:
-	cairo_surface_destroy(glyph->surf);
-	free(glyph->data);
-err_free:
-	free(glyph);
-	return ret;
-}
-
-static int tc_prepare(struct kmscon_text *txt)
-{
-	struct tc_cairo *tc = txt->data;
-	int ret;
-
-	ret = uterm_display_use(txt->disp, NULL);
-	if (ret < 0) {
-		log_error("cannot use display %p", txt->disp);
-		return ret;
-	}
-
-	tc->cur = ret;
-
-	return 0;
-}
-
-static int tc_draw(struct kmscon_text *txt,
-		   uint32_t id, const uint32_t *ch, size_t len,
-		   unsigned int width,
-		   unsigned int posx, unsigned int posy,
-		   const struct tsm_screen_attr *attr)
-{
-	struct tc_cairo *tc = txt->data;
-	cairo_t *cr = tc->ctx[tc->cur];
-	struct tc_glyph *glyph;
-	int ret;
-
-	if (!width)
-		return 0;
-
-	ret = find_glyph(txt, &glyph, id, ch, len, attr->bold);
-	if (ret)
-		return ret;
-
-	cairo_rectangle(cr,
-			posx * txt->font->attr.width,
-			posy * txt->font->attr.height,
-			txt->font->attr.width,
-			txt->font->attr.height);
-
-	if (attr->inverse)
-		cairo_set_source_rgb(cr, attr->fr / 255.0, attr->fg / 255.0,
-				     attr->fb / 255.0);
-	else
-		cairo_set_source_rgb(cr, attr->br / 255.0, attr->bg / 255.0,
-				     attr->bb / 255.0);
-
-	cairo_fill(cr);
-
-	if (attr->inverse)
-		cairo_set_source_rgb(cr, attr->br / 255.0, attr->bg / 255.0,
-				     attr->bb / 255.0);
-	else
-		cairo_set_source_rgb(cr, attr->fr / 255.0, attr->fg / 255.0,
-				     attr->fb / 255.0);
-
-	cairo_mask_surface(cr, glyph->surf,
-			   posx * txt->font->attr.width,
-			   posy * txt->font->attr.height);
-
-	return 0;
-}
-
-static int tc_render(struct kmscon_text *txt)
-{
-	struct tc_cairo *tc = txt->data;
-	int ret;
-
-	cairo_surface_flush(tc->surf[tc->cur]);
-
-	if (!tc->use_indirect)
-		return 0;
-
-	tc->vbuf.data = tc->data[tc->cur];
-	ret = uterm_display_blit(txt->disp, &tc->vbuf, 0, 0);
-	if (ret) {
-		log_error("cannot blit back-buffer to display: %d", ret);
-		return ret;
-	}
-
-	return 0;
-}
-
-struct kmscon_text_ops kmscon_text_cairo_ops = {
-	.name = "cairo",
-	.owner = NULL,
-	.init = tc_init,
-	.destroy = tc_destroy,
-	.set = tc_set,
-	.unset = tc_unset,
-	.prepare = tc_prepare,
-	.draw = tc_draw,
-	.render = tc_render,
-	.abort = NULL,
-};