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Diffstat (limited to 'libs/cairo-1.16.0/src/drm/cairo-drm-i965-spans.c')
-rw-r--r--libs/cairo-1.16.0/src/drm/cairo-drm-i965-spans.c407
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;
+}
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