1 files changed, 503 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/src/cairo-gl-glyphs.c b/libs/cairo-1.16.0/src/cairo-gl-glyphs.c
new file mode 100644
index 0000000..5923af4
--- /dev/null
+++ b/libs/cairo-1.16.0/src/cairo-gl-glyphs.c
@@ -0,0 +1,503 @@
+/* Cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2009 Chris Wilson
+ * Copyright © 2010 Intel Corporation
+ * Copyright © 2010 Red Hat, Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is Chris Wilson.
+ *
+ * Contributors:
+ *      Benjamin Otte <otte@gnome.org>
+ *	Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairoint.h"
+
+#include "cairo-gl-private.h"
+
+#include "cairo-compositor-private.h"
+#include "cairo-composite-rectangles-private.h"
+#include "cairo-error-private.h"
+#include "cairo-image-surface-private.h"
+#include "cairo-rtree-private.h"
+
+#define GLYPH_CACHE_WIDTH 1024
+#define GLYPH_CACHE_HEIGHT 1024
+#define GLYPH_CACHE_MIN_SIZE 4
+#define GLYPH_CACHE_MAX_SIZE 128
+
+typedef struct _cairo_gl_glyph {
+    cairo_rtree_node_t node;
+    cairo_scaled_glyph_private_t base;
+    cairo_scaled_glyph_t *glyph;
+    cairo_gl_glyph_cache_t *cache;
+    struct { float x, y; } p1, p2;
+} cairo_gl_glyph_t;
+
+static void
+_cairo_gl_node_destroy (cairo_rtree_node_t *node)
+{
+    cairo_gl_glyph_t *priv = cairo_container_of (node, cairo_gl_glyph_t, node);
+    cairo_scaled_glyph_t *glyph;
+
+    glyph = priv->glyph;
+    if (glyph == NULL)
+	    return;
+
+    if (glyph->dev_private_key == priv->cache) {
+	    glyph->dev_private = NULL;
+	    glyph->dev_private_key = NULL;
+    }
+    cairo_list_del (&priv->base.link);
+    priv->glyph = NULL;
+}
+
+static void
+_cairo_gl_glyph_fini (cairo_scaled_glyph_private_t *glyph_private,
+		      cairo_scaled_glyph_t *scaled_glyph,
+		      cairo_scaled_font_t  *scaled_font)
+{
+    cairo_gl_glyph_t *priv = cairo_container_of (glyph_private,
+						 cairo_gl_glyph_t,
+						 base);
+
+    assert (priv->glyph);
+
+    _cairo_gl_node_destroy (&priv->node);
+
+    /* XXX thread-safety? Probably ok due to the frozen scaled-font. */
+    if (! priv->node.pinned)
+	_cairo_rtree_node_remove (&priv->cache->rtree, &priv->node);
+
+    assert (priv->glyph == NULL);
+}
+
+static cairo_int_status_t
+_cairo_gl_glyph_cache_add_glyph (cairo_gl_context_t *ctx,
+				 cairo_gl_glyph_cache_t *cache,
+				 cairo_scaled_glyph_t  *scaled_glyph)
+{
+    cairo_image_surface_t *glyph_surface = scaled_glyph->surface;
+    cairo_gl_glyph_t *glyph_private;
+    cairo_rtree_node_t *node = NULL;
+    cairo_int_status_t status;
+    int width, height;
+
+    width = glyph_surface->width;
+    if (width < GLYPH_CACHE_MIN_SIZE)
+	width = GLYPH_CACHE_MIN_SIZE;
+    height = glyph_surface->height;
+    if (height < GLYPH_CACHE_MIN_SIZE)
+	height = GLYPH_CACHE_MIN_SIZE;
+
+    /* search for an available slot */
+    status = _cairo_rtree_insert (&cache->rtree, width, height, &node);
+    /* search for an unlocked slot */
+    if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
+	status = _cairo_rtree_evict_random (&cache->rtree,
+					    width, height, &node);
+	if (status == CAIRO_INT_STATUS_SUCCESS) {
+	    status = _cairo_rtree_node_insert (&cache->rtree,
+					       node, width, height, &node);
+	}
+    }
+    if (status)
+	return status;
+
+    /* XXX: Make sure we use the mask texture. This should work automagically somehow */
+    glActiveTexture (GL_TEXTURE1);
+    status = _cairo_gl_surface_draw_image (cache->surface, glyph_surface,
+					   0, 0,
+					   glyph_surface->width, glyph_surface->height,
+					   node->x, node->y, FALSE);
+    if (unlikely (status))
+	return status;
+
+    glyph_private = (cairo_gl_glyph_t *) node;
+    glyph_private->cache = cache;
+    glyph_private->glyph = scaled_glyph;
+    _cairo_scaled_glyph_attach_private (scaled_glyph,
+					&glyph_private->base,
+					cache,
+					_cairo_gl_glyph_fini);
+
+    scaled_glyph->dev_private = glyph_private;
+    scaled_glyph->dev_private_key = cache;
+
+    /* compute tex coords */
+    glyph_private->p1.x = node->x;
+    glyph_private->p1.y = node->y;
+    glyph_private->p2.x = node->x + glyph_surface->width;
+    glyph_private->p2.y = node->y + glyph_surface->height;
+    if (! _cairo_gl_device_requires_power_of_two_textures (&ctx->base)) {
+	glyph_private->p1.x /= GLYPH_CACHE_WIDTH;
+	glyph_private->p2.x /= GLYPH_CACHE_WIDTH;
+	glyph_private->p1.y /= GLYPH_CACHE_HEIGHT;
+	glyph_private->p2.y /= GLYPH_CACHE_HEIGHT;
+    }
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_gl_glyph_t *
+_cairo_gl_glyph_cache_lock (cairo_gl_glyph_cache_t *cache,
+			    cairo_scaled_glyph_t *scaled_glyph)
+{
+    return _cairo_rtree_pin (&cache->rtree, scaled_glyph->dev_private);
+}
+
+static cairo_status_t
+cairo_gl_context_get_glyph_cache (cairo_gl_context_t *ctx,
+				  cairo_format_t format,
+				  cairo_gl_glyph_cache_t **cache_out)
+{
+    cairo_gl_glyph_cache_t *cache;
+    cairo_content_t content;
+
+    switch (format) {
+    case CAIRO_FORMAT_RGB30:
+    case CAIRO_FORMAT_RGB16_565:
+    case CAIRO_FORMAT_ARGB32:
+    case CAIRO_FORMAT_RGB24:
+	cache = &ctx->glyph_cache[0];
+	content = CAIRO_CONTENT_COLOR_ALPHA;
+	break;
+    case CAIRO_FORMAT_A8:
+    case CAIRO_FORMAT_A1:
+	cache = &ctx->glyph_cache[1];
+	content = CAIRO_CONTENT_ALPHA;
+	break;
+    default:
+    case CAIRO_FORMAT_INVALID:
+	ASSERT_NOT_REACHED;
+	return _cairo_error (CAIRO_STATUS_INVALID_FORMAT);
+    }
+
+    if (unlikely (cache->surface == NULL)) {
+	cairo_surface_t *surface;
+
+	surface = _cairo_gl_surface_create_scratch_for_caching (ctx,
+								content,
+								GLYPH_CACHE_WIDTH,
+								GLYPH_CACHE_HEIGHT);
+	if (unlikely (surface->status))
+	    return surface->status;
+
+	_cairo_surface_release_device_reference (surface);
+
+	cache->surface = (cairo_gl_surface_t *)surface;
+	cache->surface->operand.texture.attributes.has_component_alpha =
+	    content == CAIRO_CONTENT_COLOR_ALPHA;
+    }
+
+    *cache_out = cache;
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+render_glyphs (cairo_gl_surface_t *dst,
+	       int dst_x, int dst_y,
+	       cairo_operator_t op,
+	       cairo_surface_t *source,
+	       cairo_composite_glyphs_info_t *info,
+	       cairo_bool_t *has_component_alpha,
+	       cairo_clip_t *clip)
+{
+    cairo_format_t last_format = CAIRO_FORMAT_INVALID;
+    cairo_gl_glyph_cache_t *cache = NULL;
+    cairo_gl_context_t *ctx;
+    cairo_gl_emit_glyph_t emit = NULL;
+    cairo_gl_composite_t setup;
+    cairo_int_status_t status;
+    int i = 0;
+
+    TRACE ((stderr, "%s (%d, %d)x(%d, %d)\n", __FUNCTION__,
+	    info->extents.x, info->extents.y,
+	    info->extents.width, info->extents.height));
+
+    *has_component_alpha = FALSE;
+
+    status = _cairo_gl_context_acquire (dst->base.device, &ctx);
+    if (unlikely (status))
+	return status;
+
+    status = _cairo_gl_composite_init (&setup, op, dst, TRUE);
+    if (unlikely (status))
+	goto FINISH;
+
+    if (source == NULL) {
+	    _cairo_gl_composite_set_solid_source (&setup, CAIRO_COLOR_WHITE);
+    } else {
+	    _cairo_gl_composite_set_source_operand (&setup,
+						    source_to_operand (source));
+
+    }
+
+    _cairo_gl_composite_set_clip (&setup, clip);
+
+    for (i = 0; i < info->num_glyphs; i++) {
+	cairo_scaled_glyph_t *scaled_glyph;
+	cairo_gl_glyph_t *glyph;
+	double x_offset, y_offset;
+	double x1, x2, y1, y2;
+
+	status = _cairo_scaled_glyph_lookup (info->font,
+					     info->glyphs[i].index,
+					     CAIRO_SCALED_GLYPH_INFO_SURFACE,
+					     &scaled_glyph);
+	if (unlikely (status))
+	    goto FINISH;
+
+	if (scaled_glyph->surface->width  == 0 ||
+	    scaled_glyph->surface->height == 0)
+	{
+	    continue;
+	}
+	if (scaled_glyph->surface->format != last_format) {
+	    status = cairo_gl_context_get_glyph_cache (ctx,
+						       scaled_glyph->surface->format,
+						       &cache);
+	    if (unlikely (status))
+		goto FINISH;
+
+	    last_format = scaled_glyph->surface->format;
+
+	    _cairo_gl_composite_set_mask_operand (&setup, &cache->surface->operand);
+	    *has_component_alpha |= cache->surface->operand.texture.attributes.has_component_alpha;
+
+	    /* XXX Shoot me. */
+	    status = _cairo_gl_composite_begin (&setup, &ctx);
+	    status = _cairo_gl_context_release (ctx, status);
+	    if (unlikely (status))
+		goto FINISH;
+
+	    emit = _cairo_gl_context_choose_emit_glyph (ctx);
+	}
+
+	if (scaled_glyph->dev_private_key != cache) {
+	    cairo_scaled_glyph_private_t *priv;
+
+	    priv = _cairo_scaled_glyph_find_private (scaled_glyph, cache);
+	    if (priv) {
+		scaled_glyph->dev_private_key = cache;
+		scaled_glyph->dev_private = cairo_container_of (priv,
+								cairo_gl_glyph_t,
+								base);
+	    } else {
+		status = _cairo_gl_glyph_cache_add_glyph (ctx, cache, scaled_glyph);
+
+		if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
+		    /* Cache is full, so flush existing prims and try again. */
+		    _cairo_gl_composite_flush (ctx);
+		    _cairo_gl_glyph_cache_unlock (cache);
+		    status = _cairo_gl_glyph_cache_add_glyph (ctx, cache, scaled_glyph);
+		}
+
+		if (unlikely (_cairo_int_status_is_error (status)))
+		    goto FINISH;
+	    }
+	}
+
+	x_offset = scaled_glyph->surface->base.device_transform.x0;
+	y_offset = scaled_glyph->surface->base.device_transform.y0;
+
+	x1 = _cairo_lround (info->glyphs[i].x - x_offset - dst_x);
+	y1 = _cairo_lround (info->glyphs[i].y - y_offset - dst_y);
+	x2 = x1 + scaled_glyph->surface->width;
+	y2 = y1 + scaled_glyph->surface->height;
+
+	glyph = _cairo_gl_glyph_cache_lock (cache, scaled_glyph);
+	assert (emit);
+	emit (ctx,
+	      x1, y1, x2, y2,
+	      glyph->p1.x, glyph->p1.y,
+	      glyph->p2.x, glyph->p2.y);
+    }
+
+    status = CAIRO_STATUS_SUCCESS;
+  FINISH:
+    status = _cairo_gl_context_release (ctx, status);
+
+    _cairo_gl_composite_fini (&setup);
+    return status;
+}
+
+static cairo_int_status_t
+render_glyphs_via_mask (cairo_gl_surface_t *dst,
+			int dst_x, int dst_y,
+			cairo_operator_t  op,
+			cairo_surface_t *source,
+			cairo_composite_glyphs_info_t *info,
+			cairo_clip_t *clip)
+{
+    cairo_surface_t *mask;
+    cairo_status_t status;
+    cairo_bool_t has_component_alpha;
+
+    TRACE ((stderr, "%s\n", __FUNCTION__));
+
+    /* XXX: For non-CA, this should be CAIRO_CONTENT_ALPHA to save memory */
+    mask = cairo_gl_surface_create (dst->base.device,
+				    CAIRO_CONTENT_COLOR_ALPHA,
+				    info->extents.width,
+				    info->extents.height);
+    if (unlikely (mask->status))
+	return mask->status;
+
+    status = render_glyphs ((cairo_gl_surface_t *) mask,
+			    info->extents.x, info->extents.y,
+			    CAIRO_OPERATOR_ADD, NULL,
+			    info, &has_component_alpha, NULL);
+    if (likely (status == CAIRO_STATUS_SUCCESS)) {
+	cairo_surface_pattern_t mask_pattern;
+	cairo_surface_pattern_t source_pattern;
+	cairo_rectangle_int_t clip_extents;
+
+	mask->is_clear = FALSE;
+	_cairo_pattern_init_for_surface (&mask_pattern, mask);
+	mask_pattern.base.has_component_alpha = has_component_alpha;
+	mask_pattern.base.filter = CAIRO_FILTER_NEAREST;
+	mask_pattern.base.extend = CAIRO_EXTEND_NONE;
+
+	cairo_matrix_init_translate (&mask_pattern.base.matrix,
+				     dst_x-info->extents.x, dst_y-info->extents.y);
+
+	_cairo_pattern_init_for_surface (&source_pattern, source);
+	cairo_matrix_init_translate (&source_pattern.base.matrix,
+				     dst_x-info->extents.x, dst_y-info->extents.y);
+
+	clip = _cairo_clip_copy (clip);
+	clip_extents.x = info->extents.x - dst_x;
+	clip_extents.y = info->extents.y - dst_y;
+	clip_extents.width = info->extents.width;
+	clip_extents.height = info->extents.height;
+	clip = _cairo_clip_intersect_rectangle (clip, &clip_extents);
+
+	status = _cairo_surface_mask (&dst->base, op,
+				      &source_pattern.base,
+				      &mask_pattern.base,
+				      clip);
+
+	_cairo_clip_destroy (clip);
+
+	_cairo_pattern_fini (&mask_pattern.base);
+	_cairo_pattern_fini (&source_pattern.base);
+    }
+
+    cairo_surface_destroy (mask);
+
+    return status;
+}
+
+cairo_int_status_t
+_cairo_gl_check_composite_glyphs (const cairo_composite_rectangles_t *extents,
+				  cairo_scaled_font_t *scaled_font,
+				  cairo_glyph_t *glyphs,
+				  int *num_glyphs)
+{
+    if (! _cairo_gl_operator_is_supported (extents->op))
+	return UNSUPPORTED ("unsupported operator");
+
+    /* XXX use individual masks for large glyphs? */
+    if (ceil (scaled_font->max_scale) >= GLYPH_CACHE_MAX_SIZE)
+	return UNSUPPORTED ("glyphs too large");
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+cairo_int_status_t
+_cairo_gl_composite_glyphs_with_clip (void			    *_dst,
+				      cairo_operator_t		     op,
+				      cairo_surface_t		    *_src,
+				      int			     src_x,
+				      int			     src_y,
+				      int			     dst_x,
+				      int			     dst_y,
+				      cairo_composite_glyphs_info_t *info,
+				      cairo_clip_t		    *clip)
+{
+    cairo_gl_surface_t *dst = _dst;
+    cairo_bool_t has_component_alpha;
+
+    TRACE ((stderr, "%s\n", __FUNCTION__));
+
+    /* If any of the glyphs require component alpha, we have to go through
+     * a mask, since only _cairo_gl_surface_composite() currently supports
+     * component alpha.
+     */
+    if (!dst->base.is_clear && ! info->use_mask && op != CAIRO_OPERATOR_OVER &&
+	(info->font->options.antialias == CAIRO_ANTIALIAS_SUBPIXEL ||
+	 info->font->options.antialias == CAIRO_ANTIALIAS_BEST))
+    {
+	info->use_mask = TRUE;
+    }
+
+    if (info->use_mask) {
+	return render_glyphs_via_mask (dst, dst_x, dst_y,
+				       op, _src, info, clip);
+    } else {
+	return render_glyphs (dst, dst_x, dst_y,
+			      op, _src, info,
+			      &has_component_alpha,
+			      clip);
+    }
+
+}
+
+cairo_int_status_t
+_cairo_gl_composite_glyphs (void			*_dst,
+			    cairo_operator_t		 op,
+			    cairo_surface_t		*_src,
+			    int				 src_x,
+			    int				 src_y,
+			    int				 dst_x,
+			    int				 dst_y,
+			    cairo_composite_glyphs_info_t *info)
+{
+    return _cairo_gl_composite_glyphs_with_clip (_dst, op, _src, src_x, src_y,
+						 dst_x, dst_y, info, NULL);
+}
+
+void
+_cairo_gl_glyph_cache_init (cairo_gl_glyph_cache_t *cache)
+{
+    _cairo_rtree_init (&cache->rtree,
+		       GLYPH_CACHE_WIDTH,
+		       GLYPH_CACHE_HEIGHT,
+		       GLYPH_CACHE_MIN_SIZE,
+		       sizeof (cairo_gl_glyph_t),
+		       _cairo_gl_node_destroy);
+}
+
+void
+_cairo_gl_glyph_cache_fini (cairo_gl_context_t *ctx,
+			    cairo_gl_glyph_cache_t *cache)
+{
+    _cairo_rtree_fini (&cache->rtree);
+    cairo_surface_destroy (&cache->surface->base);
+}