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-rw-r--r--Build/source/libs/cairo/cairo-src/src/cairo-gl-gradient.c339
1 files changed, 0 insertions, 339 deletions
diff --git a/Build/source/libs/cairo/cairo-src/src/cairo-gl-gradient.c b/Build/source/libs/cairo/cairo-src/src/cairo-gl-gradient.c
deleted file mode 100644
index 6107bea1e08..00000000000
--- a/Build/source/libs/cairo/cairo-src/src/cairo-gl-gradient.c
+++ /dev/null
@@ -1,339 +0,0 @@
-/* cairo - a vector graphics library with display and print output
- *
- * Copyright © 2009 Eric Anholt
- * Copyright © 2009 Chris Wilson
- * Copyright © 2005,2010 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 Red Hat, Inc.
- *
- * Contributor(s):
- * Benjamin Otte <otte@gnome.org>
- * Carl Worth <cworth@cworth.org>
- * Chris Wilson <chris@chris-wilson.co.uk>
- * Eric Anholt <eric@anholt.net>
- */
-
-#include "cairoint.h"
-
-#include "cairo-error-private.h"
-#include "cairo-gl-gradient-private.h"
-#include "cairo-gl-private.h"
-
-
-static int
-_cairo_gl_gradient_sample_width (unsigned int n_stops,
- const cairo_gradient_stop_t *stops)
-{
- unsigned int n;
- int width;
-
- width = 8;
- for (n = 1; n < n_stops; n++) {
- double dx = stops[n].offset - stops[n-1].offset;
- double delta, max;
- int ramp;
-
- if (dx == 0)
- return 1024; /* we need to emulate an infinitely sharp step */
-
- max = fabs (stops[n].color.red - stops[n-1].color.red);
-
- delta = fabs (stops[n].color.green - stops[n-1].color.green);
- if (delta > max)
- max = delta;
-
- delta = fabs (stops[n].color.blue - stops[n-1].color.blue);
- if (delta > max)
- max = delta;
-
- delta = fabs (stops[n].color.alpha - stops[n-1].color.alpha);
- if (delta > max)
- max = delta;
-
- ramp = 128 * max / dx;
- if (ramp > width)
- width = ramp;
- }
-
- return (width + 7) & -8;
-}
-
-static uint8_t premultiply(double c, double a)
-{
- int v = c * a * 256;
- return v - (v >> 8);
-}
-
-static uint32_t color_stop_to_pixel(const cairo_gradient_stop_t *stop)
-{
- uint8_t a, r, g, b;
-
- a = stop->color.alpha_short >> 8;
- r = premultiply(stop->color.red, stop->color.alpha);
- g = premultiply(stop->color.green, stop->color.alpha);
- b = premultiply(stop->color.blue, stop->color.alpha);
-
- if (_cairo_is_little_endian ())
- return a << 24 | r << 16 | g << 8 | b << 0;
- else
- return a << 0 | r << 8 | g << 16 | b << 24;
-}
-
-static cairo_status_t
-_cairo_gl_gradient_render (const cairo_gl_context_t *ctx,
- unsigned int n_stops,
- const cairo_gradient_stop_t *stops,
- void *bytes,
- int width)
-{
- pixman_image_t *gradient, *image;
- pixman_gradient_stop_t pixman_stops_stack[32];
- pixman_gradient_stop_t *pixman_stops;
- pixman_point_fixed_t p1, p2;
- unsigned int i;
- pixman_format_code_t gradient_pixman_format;
-
- /*
- * Ensure that the order of the gradient's components in memory is BGRA.
- * This is done so that the gradient's pixel data is always suitable for
- * texture upload using format=GL_BGRA and type=GL_UNSIGNED_BYTE.
- */
- if (_cairo_is_little_endian ())
- gradient_pixman_format = PIXMAN_a8r8g8b8;
- else
- gradient_pixman_format = PIXMAN_b8g8r8a8;
-
- pixman_stops = pixman_stops_stack;
- if (unlikely (n_stops > ARRAY_LENGTH (pixman_stops_stack))) {
- pixman_stops = _cairo_malloc_ab (n_stops,
- sizeof (pixman_gradient_stop_t));
- if (unlikely (pixman_stops == NULL))
- return _cairo_error (CAIRO_STATUS_NO_MEMORY);
- }
-
- for (i = 0; i < n_stops; i++) {
- pixman_stops[i].x = _cairo_fixed_16_16_from_double (stops[i].offset);
- pixman_stops[i].color.red = stops[i].color.red_short;
- pixman_stops[i].color.green = stops[i].color.green_short;
- pixman_stops[i].color.blue = stops[i].color.blue_short;
- pixman_stops[i].color.alpha = stops[i].color.alpha_short;
- }
-
- p1.x = _cairo_fixed_16_16_from_double (0.5);
- p1.y = 0;
- p2.x = _cairo_fixed_16_16_from_double (width - 0.5);
- p2.y = 0;
-
- gradient = pixman_image_create_linear_gradient (&p1, &p2,
- pixman_stops,
- n_stops);
- if (pixman_stops != pixman_stops_stack)
- free (pixman_stops);
-
- if (unlikely (gradient == NULL))
- return _cairo_error (CAIRO_STATUS_NO_MEMORY);
-
- pixman_image_set_filter (gradient, PIXMAN_FILTER_BILINEAR, NULL, 0);
- pixman_image_set_repeat (gradient, PIXMAN_REPEAT_PAD);
-
- image = pixman_image_create_bits (gradient_pixman_format, width, 1,
- bytes, sizeof(uint32_t)*width);
- if (unlikely (image == NULL)) {
- pixman_image_unref (gradient);
- return _cairo_error (CAIRO_STATUS_NO_MEMORY);
- }
-
- pixman_image_composite32 (PIXMAN_OP_SRC,
- gradient, NULL, image,
- 0, 0,
- 0, 0,
- 0, 0,
- width, 1);
-
- pixman_image_unref (gradient);
- pixman_image_unref (image);
-
- /* We need to fudge pixel 0 to hold the left-most color stop and not
- * the neareset stop to the zeroth pixel centre in order to correctly
- * populate the border color. For completeness, do both edges.
- */
- ((uint32_t*)bytes)[0] = color_stop_to_pixel(&stops[0]);
- ((uint32_t*)bytes)[width-1] = color_stop_to_pixel(&stops[n_stops-1]);
-
- return CAIRO_STATUS_SUCCESS;
-}
-
-static unsigned long
-_cairo_gl_gradient_hash (unsigned int n_stops,
- const cairo_gradient_stop_t *stops)
-{
- return _cairo_hash_bytes (n_stops,
- stops,
- sizeof (cairo_gradient_stop_t) * n_stops);
-}
-
-static cairo_gl_gradient_t *
-_cairo_gl_gradient_lookup (cairo_gl_context_t *ctx,
- unsigned long hash,
- unsigned int n_stops,
- const cairo_gradient_stop_t *stops)
-{
- cairo_gl_gradient_t lookup;
-
- lookup.cache_entry.hash = hash,
- lookup.n_stops = n_stops;
- lookup.stops = stops;
-
- return _cairo_cache_lookup (&ctx->gradients, &lookup.cache_entry);
-}
-
-cairo_bool_t
-_cairo_gl_gradient_equal (const void *key_a, const void *key_b)
-{
- const cairo_gl_gradient_t *a = key_a;
- const cairo_gl_gradient_t *b = key_b;
-
- if (a->n_stops != b->n_stops)
- return FALSE;
-
- return memcmp (a->stops, b->stops, a->n_stops * sizeof (cairo_gradient_stop_t)) == 0;
-}
-
-cairo_int_status_t
-_cairo_gl_gradient_create (cairo_gl_context_t *ctx,
- unsigned int n_stops,
- const cairo_gradient_stop_t *stops,
- cairo_gl_gradient_t **gradient_out)
-{
- unsigned long hash;
- cairo_gl_gradient_t *gradient;
- cairo_status_t status;
- int tex_width;
- GLint internal_format;
- void *data;
-
- if ((unsigned int) ctx->max_texture_size / 2 <= n_stops)
- return CAIRO_INT_STATUS_UNSUPPORTED;
-
- hash = _cairo_gl_gradient_hash (n_stops, stops);
-
- gradient = _cairo_gl_gradient_lookup (ctx, hash, n_stops, stops);
- if (gradient) {
- *gradient_out = _cairo_gl_gradient_reference (gradient);
- return CAIRO_STATUS_SUCCESS;
- }
-
- gradient = _cairo_malloc (sizeof (cairo_gl_gradient_t) + sizeof (cairo_gradient_stop_t) * (n_stops - 1));
- if (gradient == NULL)
- return _cairo_error (CAIRO_STATUS_NO_MEMORY);
-
- tex_width = _cairo_gl_gradient_sample_width (n_stops, stops);
- if (tex_width > ctx->max_texture_size)
- tex_width = ctx->max_texture_size;
-
- CAIRO_REFERENCE_COUNT_INIT (&gradient->ref_count, 2);
- gradient->cache_entry.hash = hash;
- gradient->cache_entry.size = tex_width;
- gradient->device = &ctx->base;
- gradient->n_stops = n_stops;
- gradient->stops = gradient->stops_embedded;
- memcpy (gradient->stops_embedded, stops, n_stops * sizeof (cairo_gradient_stop_t));
-
- glGenTextures (1, &gradient->tex);
- _cairo_gl_context_activate (ctx, CAIRO_GL_TEX_TEMP);
- glBindTexture (ctx->tex_target, gradient->tex);
-
- data = _cairo_malloc_ab (tex_width, sizeof (uint32_t));
- if (unlikely (data == NULL)) {
- status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
- goto cleanup_gradient;
- }
-
- status = _cairo_gl_gradient_render (ctx, n_stops, stops, data, tex_width);
- if (unlikely (status))
- goto cleanup_data;
-
- /*
- * In OpenGL ES 2.0 no format conversion is allowed i.e. 'internalFormat'
- * must match 'format' in glTexImage2D.
- */
- if (_cairo_gl_get_flavor () == CAIRO_GL_FLAVOR_ES3 ||
- _cairo_gl_get_flavor () == CAIRO_GL_FLAVOR_ES2)
- internal_format = GL_BGRA;
- else
- internal_format = GL_RGBA;
-
- glTexImage2D (ctx->tex_target, 0, internal_format, tex_width, 1, 0,
- GL_BGRA, GL_UNSIGNED_BYTE, data);
-
- free (data);
-
- /* we ignore errors here and just return an uncached gradient */
- if (unlikely (_cairo_cache_insert (&ctx->gradients, &gradient->cache_entry)))
- CAIRO_REFERENCE_COUNT_INIT (&gradient->ref_count, 1);
-
- *gradient_out = gradient;
- return CAIRO_STATUS_SUCCESS;
-
-cleanup_data:
- free (data);
-cleanup_gradient:
- free (gradient);
- return status;
-}
-
-cairo_gl_gradient_t *
-_cairo_gl_gradient_reference (cairo_gl_gradient_t *gradient)
-{
- assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&gradient->ref_count));
-
- _cairo_reference_count_inc (&gradient->ref_count);
-
- return gradient;
-}
-
-void
-_cairo_gl_gradient_destroy (cairo_gl_gradient_t *gradient)
-{
- cairo_gl_context_t *ctx;
- cairo_status_t ignore;
-
- assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&gradient->ref_count));
-
- if (! _cairo_reference_count_dec_and_test (&gradient->ref_count))
- return;
-
- if (_cairo_gl_context_acquire (gradient->device, &ctx) == CAIRO_STATUS_SUCCESS) {
- /* The gradient my still be active in the last operation, so flush */
- _cairo_gl_composite_flush (ctx);
- glDeleteTextures (1, &gradient->tex);
- ignore = _cairo_gl_context_release (ctx, CAIRO_STATUS_SUCCESS);
- }
-
- free (gradient);
-}