add cairo

1 files changed, 407 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/src/drm/cairo-drm-i965-spans.c b/libs/cairo-1.16.0/src/drm/cairo-drm-i965-spans.c
new file mode 100644
index 0000000..4d1f491
--- /dev/null
+++ b/libs/cairo-1.16.0/src/drm/cairo-drm-i965-spans.c
@@ -0,0 +1,407 @@
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2009 Intel Corporation
+ *
+ * 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 Red Hat, Inc.
+ *
+ * Contributor(s):
+ *	Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairoint.h"
+
+#include "cairo-composite-rectangles-private.h"
+#include "cairo-boxes-private.h"
+#include "cairo-error-private.h"
+#include "cairo-drm-i965-private.h"
+
+/* Operates in either immediate or retained mode.
+ * When given a clip region we record the sequence of vbo and then
+ * replay them for each clip rectangle, otherwise we simply emit
+ * the vbo straight into the command stream.
+ */
+
+typedef struct _i965_spans i965_spans_t;
+
+typedef float *
+(*i965_get_rectangle_func_t) (i965_spans_t *spans);
+
+struct _i965_spans {
+    cairo_span_renderer_t renderer;
+
+    i965_device_t *device;
+
+    int xmin, xmax;
+    cairo_bool_t is_bounded;
+    const cairo_rectangle_int_t *extents;
+
+    i965_get_rectangle_func_t get_rectangle;
+    i965_shader_t shader;
+
+    cairo_region_t *clip_region;
+
+    struct i965_vbo head, *tail;
+
+    unsigned int vbo_offset;
+    float *vbo_base;
+};
+
+static float *
+i965_spans_emit_rectangle (i965_spans_t *spans)
+{
+    return i965_add_rectangle (spans->device);
+}
+
+static float *
+i965_spans_accumulate_rectangle (i965_spans_t *spans)
+{
+    float *vertices;
+    uint32_t size;
+
+    size = spans->device->rectangle_size;
+    if (unlikely (spans->vbo_offset + size > I965_VERTEX_SIZE)) {
+	struct i965_vbo *vbo;
+
+	vbo = _cairo_malloc (sizeof (struct i965_vbo));
+	if (unlikely (vbo == NULL)) {
+	    /* throw error! */
+	}
+
+	spans->tail->next = vbo;
+	spans->tail = vbo;
+
+	vbo->next = NULL;
+	vbo->bo = intel_bo_create (&spans->device->intel,
+				   I965_VERTEX_SIZE, I965_VERTEX_SIZE,
+				   FALSE, I915_TILING_NONE, 0);
+	vbo->count = 0;
+
+	spans->vbo_offset = 0;
+	spans->vbo_base = intel_bo_map (&spans->device->intel, vbo->bo);
+    }
+
+    vertices = spans->vbo_base + spans->vbo_offset;
+    spans->vbo_offset += size;
+    spans->tail->count += 3;
+
+    return vertices;
+}
+
+static void
+i965_span_rectangle (i965_spans_t *spans,
+		     int x0, int x1, int y0, int y1,
+		     int alpha)
+{
+    float *vertices;
+    float a = alpha / 255.;
+
+    vertices = spans->get_rectangle (spans);
+
+    *vertices++ = x1;
+    *vertices++ = y1;
+    *vertices++ = a;
+
+    *vertices++ = x0;
+    *vertices++ = y1;
+    *vertices++ = a;
+
+    *vertices++ = x0;
+    *vertices++ = y0;
+    *vertices++ = a;
+}
+
+static cairo_status_t
+i965_bounded_spans_mono (void *abstract_renderer,
+			 int y, int height,
+			 const cairo_half_open_span_t *half,
+			 unsigned num_spans)
+{
+    i965_spans_t *spans = abstract_renderer;
+
+    if (num_spans == 0)
+	return CAIRO_STATUS_SUCCESS;
+
+    do {
+	if (half[0].coverage >= 128) {
+	    i965_span_rectangle (spans,
+				 half[0].x, half[1].x,
+				 y, y + height,
+				 255);
+	}
+	half++;
+    } while (--num_spans > 1);
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+i965_bounded_spans (void *abstract_renderer,
+		    int y, int height,
+		    const cairo_half_open_span_t *half,
+		    unsigned num_spans)
+{
+    i965_spans_t *spans = abstract_renderer;
+
+    if (num_spans == 0)
+	return CAIRO_STATUS_SUCCESS;
+
+    do {
+	if (half[0].coverage) {
+	    i965_span_rectangle (spans,
+				 half[0].x, half[1].x,
+				 y, y + height,
+				 half[0].coverage);
+	}
+	half++;
+    } while (--num_spans > 1);
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+i965_unbounded_spans (void *abstract_renderer,
+		      int y, int height,
+		      const cairo_half_open_span_t *half,
+		      unsigned num_spans)
+{
+    i965_spans_t *spans = abstract_renderer;
+
+    if (num_spans == 0) {
+	i965_span_rectangle (spans,
+			     spans->xmin, spans->xmax,
+			     y, y + height,
+			     0);
+	return CAIRO_STATUS_SUCCESS;
+    }
+
+    if (half[0].x != spans->xmin) {
+	i965_span_rectangle (spans,
+			     spans->xmin, half[0].x,
+			     y, y + height,
+			     0);
+    }
+
+    do {
+	i965_span_rectangle (spans,
+			     half[0].x, half[1].x,
+			     y, y + height,
+			     half[0].coverage);
+	half++;
+    } while (--num_spans > 1);
+
+    if (half[0].x != spans->xmax) {
+	i965_span_rectangle (spans,
+			     half[0].x, spans->xmax,
+			     y, y + height,
+			     0);
+    }
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+i965_unbounded_spans_mono (void *abstract_renderer,
+			   int y, int height,
+			   const cairo_half_open_span_t *half,
+			   unsigned num_spans)
+{
+    i965_spans_t *spans = abstract_renderer;
+
+    if (num_spans == 0) {
+	i965_span_rectangle (spans,
+			     spans->xmin, spans->xmax,
+			     y, y + height,
+			     0);
+	return CAIRO_STATUS_SUCCESS;
+    }
+
+    if (half[0].x != spans->xmin) {
+	i965_span_rectangle (spans,
+			     spans->xmin, half[0].x,
+			     y, y + height,
+			     0);
+    }
+
+    do {
+	int alpha = 0;
+	if (half[0].coverage >= 128)
+	    alpha = 255;
+	i965_span_rectangle (spans,
+			     half[0].x, half[1].x,
+			     y, y + height,
+			     alpha);
+	half++;
+    } while (--num_spans > 1);
+
+    if (half[0].x != spans->xmax) {
+	i965_span_rectangle (spans,
+			     half[0].x, spans->xmax,
+			     y, y + height,
+			     0);
+    }
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+i965_spans_init (i965_spans_t *spans,
+		 i965_surface_t *dst,
+		 cairo_operator_t op,
+		 const cairo_pattern_t *pattern,
+		 cairo_antialias_t antialias,
+		 cairo_clip_t *clip,
+		 const cairo_composite_rectangles_t *extents)
+{
+    cairo_status_t status;
+
+    spans->device = i965_device (dst);
+    i965_shader_init (&spans->shader, dst, op);
+
+    spans->is_bounded = extents->is_bounded;
+    if (extents->is_bounded) {
+	if (antialias == CAIRO_ANTIALIAS_NONE)
+	    spans->renderer.render_rows = i965_bounded_spans_mono;
+	else
+	    spans->renderer.render_rows = i965_bounded_spans;
+
+	spans->extents = &extents->bounded;
+    } else {
+	if (antialias == CAIRO_ANTIALIAS_NONE)
+	    spans->renderer.render_rows = i965_unbounded_spans_mono;
+	else
+	    spans->renderer.render_rows = i965_unbounded_spans;
+
+	spans->extents = &extents->unbounded;
+    }
+    spans->xmin = spans->extents->x;
+    spans->xmax = spans->extents->x + spans->extents->width;
+
+    spans->clip_region = NULL;
+    if (clip != NULL) {
+	cairo_region_t *clip_region = NULL;
+
+	status = _cairo_clip_get_region (clip, &clip_region);
+	assert (status == CAIRO_STATUS_SUCCESS || status == CAIRO_INT_STATUS_UNSUPPORTED);
+
+	if (clip_region != NULL && cairo_region_num_rectangles (clip_region) == 1)
+	    clip_region = NULL;
+
+	spans->clip_region = clip_region;
+	if (status == CAIRO_INT_STATUS_UNSUPPORTED)
+	    i965_shader_set_clip (&spans->shader, clip);
+    }
+
+    spans->head.next  = NULL;
+    spans->head.bo    = NULL;
+    spans->head.count = 0;
+    spans->tail = &spans->head;
+
+    if (spans->clip_region == NULL) {
+	spans->get_rectangle = i965_spans_emit_rectangle;
+    } else {
+	spans->get_rectangle = i965_spans_accumulate_rectangle;
+	spans->head.bo = intel_bo_create (&spans->device->intel,
+					  I965_VERTEX_SIZE, I965_VERTEX_SIZE,
+					  FALSE, I915_TILING_NONE, 0);
+	if (unlikely (spans->head.bo == NULL))
+	    return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+	spans->vbo_base = intel_bo_map (&spans->device->intel, spans->head.bo);
+    }
+    spans->vbo_offset = 0;
+
+    return i965_shader_acquire_pattern (&spans->shader,
+					&spans->shader.source,
+					pattern, &extents->bounded);
+}
+
+static void
+i965_spans_fini (i965_spans_t *spans)
+{
+    i965_shader_fini (&spans->shader);
+
+    if (spans->head.bo != NULL) {
+	struct i965_vbo *vbo, *next;
+
+	intel_bo_destroy (&spans->device->intel, spans->head.bo);
+	for (vbo = spans->head.next; vbo != NULL; vbo = next) {
+	    next = vbo->next;
+	    intel_bo_destroy (&spans->device->intel, vbo->bo);
+	    free (vbo);
+	}
+    }
+}
+
+cairo_status_t
+i965_clip_and_composite_spans (i965_surface_t		*dst,
+			       cairo_operator_t		 op,
+			       const cairo_pattern_t	*pattern,
+			       cairo_antialias_t	 antialias,
+			       i965_spans_func_t	 draw_func,
+			       void			*draw_closure,
+			       const cairo_composite_rectangles_t*extents,
+			       cairo_clip_t		*clip)
+{
+    i965_spans_t spans;
+    i965_device_t *device;
+    cairo_status_t status;
+
+    if (op == CAIRO_OPERATOR_CLEAR) {
+	pattern = &_cairo_pattern_white.base;
+	op = CAIRO_OPERATOR_DEST_OUT;
+    }
+
+    status = i965_spans_init (&spans, dst, op, pattern, antialias, clip, extents);
+    if (unlikely (status))
+	return status;
+
+    spans.shader.mask.base.content  = CAIRO_CONTENT_ALPHA;
+    spans.shader.mask.type.fragment = FS_SPANS;
+    spans.shader.mask.type.vertex   = VS_SPANS;
+    spans.shader.mask.type.pattern  = PATTERN_BASE;
+
+    status = cairo_device_acquire (dst->intel.drm.base.device);
+    if (unlikely (status))
+	goto CLEANUP_SPANS;
+
+    device = i965_device (dst);
+    status = i965_shader_commit (&spans.shader, device);
+    if (unlikely (status))
+	goto CLEANUP_DEVICE;
+
+    status = draw_func (draw_closure, &spans.renderer, spans.extents);
+    if (spans.clip_region != NULL && status == CAIRO_STATUS_SUCCESS)
+	i965_clipped_vertices (device, &spans.head, spans.clip_region);
+
+  CLEANUP_DEVICE:
+    cairo_device_release (dst->intel.drm.base.device);
+  CLEANUP_SPANS:
+    i965_spans_fini (&spans);
+
+    return status;
+}