add pixman and libpngraylib

1 files changed, 330 insertions, 0 deletions

diff --git a/libs/pixman-0.40.0/pixman/pixman-utils.c b/libs/pixman-0.40.0/pixman/pixman-utils.c
new file mode 100644
index 0000000..2c2dddd
--- /dev/null
+++ b/libs/pixman-0.40.0/pixman/pixman-utils.c
@@ -0,0 +1,330 @@
+/*
+ * Copyright © 2000 SuSE, Inc.
+ * Copyright © 1999 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of SuSE not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  SuSE makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ *
+ * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
+ * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author:  Keith Packard, SuSE, Inc.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "pixman-private.h"
+
+pixman_bool_t
+_pixman_multiply_overflows_size (size_t a, size_t b)
+{
+    return a >= SIZE_MAX / b;
+}
+
+pixman_bool_t
+_pixman_multiply_overflows_int (unsigned int a, unsigned int b)
+{
+    return a >= INT32_MAX / b;
+}
+
+pixman_bool_t
+_pixman_addition_overflows_int (unsigned int a, unsigned int b)
+{
+    return a > INT32_MAX - b;
+}
+
+void *
+pixman_malloc_ab_plus_c (unsigned int a, unsigned int b, unsigned int c)
+{
+    if (!b || a >= INT32_MAX / b || (a * b) > INT32_MAX - c)
+	return NULL;
+
+    return malloc (a * b + c);
+}
+
+void *
+pixman_malloc_ab (unsigned int a,
+                  unsigned int b)
+{
+    if (a >= INT32_MAX / b)
+	return NULL;
+
+    return malloc (a * b);
+}
+
+void *
+pixman_malloc_abc (unsigned int a,
+                   unsigned int b,
+                   unsigned int c)
+{
+    if (a >= INT32_MAX / b)
+	return NULL;
+    else if (a * b >= INT32_MAX / c)
+	return NULL;
+    else
+	return malloc (a * b * c);
+}
+
+static force_inline uint16_t
+float_to_unorm (float f, int n_bits)
+{
+    uint32_t u;
+
+    if (f > 1.0)
+	f = 1.0;
+    if (f < 0.0)
+	f = 0.0;
+
+    u = f * (1 << n_bits);
+    u -= (u >> n_bits);
+
+    return u;
+}
+
+static force_inline float
+unorm_to_float (uint16_t u, int n_bits)
+{
+    uint32_t m = ((1 << n_bits) - 1);
+
+    return (u & m) * (1.f / (float)m);
+}
+
+/*
+ * This function expands images from a8r8g8b8 to argb_t.  To preserve
+ * precision, it needs to know from which source format the a8r8g8b8 pixels
+ * originally came.
+ *
+ * For example, if the source was PIXMAN_x1r5g5b5 and the red component
+ * contained bits 12345, then the 8-bit value is 12345123.  To correctly
+ * expand this to floating point, it should be 12345 / 31.0 and not
+ * 12345123 / 255.0.
+ */
+void
+pixman_expand_to_float (argb_t               *dst,
+			const uint32_t       *src,
+			pixman_format_code_t  format,
+			int                   width)
+{
+    static const float multipliers[16] = {
+	0.0f,
+	1.0f / ((1 <<  1) - 1),
+	1.0f / ((1 <<  2) - 1),
+	1.0f / ((1 <<  3) - 1),
+	1.0f / ((1 <<  4) - 1),
+	1.0f / ((1 <<  5) - 1),
+	1.0f / ((1 <<  6) - 1),
+	1.0f / ((1 <<  7) - 1),
+	1.0f / ((1 <<  8) - 1),
+	1.0f / ((1 <<  9) - 1),
+	1.0f / ((1 << 10) - 1),
+	1.0f / ((1 << 11) - 1),
+	1.0f / ((1 << 12) - 1),
+	1.0f / ((1 << 13) - 1),
+	1.0f / ((1 << 14) - 1),
+	1.0f / ((1 << 15) - 1),
+    };
+    int a_size, r_size, g_size, b_size;
+    int a_shift, r_shift, g_shift, b_shift;
+    float a_mul, r_mul, g_mul, b_mul;
+    uint32_t a_mask, r_mask, g_mask, b_mask;
+    int i;
+
+    if (!PIXMAN_FORMAT_VIS (format))
+	format = PIXMAN_a8r8g8b8;
+
+    /*
+     * Determine the sizes of each component and the masks and shifts
+     * required to extract them from the source pixel.
+     */
+    a_size = PIXMAN_FORMAT_A (format);
+    r_size = PIXMAN_FORMAT_R (format);
+    g_size = PIXMAN_FORMAT_G (format);
+    b_size = PIXMAN_FORMAT_B (format);
+
+    a_shift = 32 - a_size;
+    r_shift = 24 - r_size;
+    g_shift = 16 - g_size;
+    b_shift =  8 - b_size;
+
+    a_mask = ((1 << a_size) - 1);
+    r_mask = ((1 << r_size) - 1);
+    g_mask = ((1 << g_size) - 1);
+    b_mask = ((1 << b_size) - 1);
+
+    a_mul = multipliers[a_size];
+    r_mul = multipliers[r_size];
+    g_mul = multipliers[g_size];
+    b_mul = multipliers[b_size];
+
+    /* Start at the end so that we can do the expansion in place
+     * when src == dst
+     */
+    for (i = width - 1; i >= 0; i--)
+    {
+	const uint32_t pixel = src[i];
+
+	dst[i].a = a_mask? ((pixel >> a_shift) & a_mask) * a_mul : 1.0f;
+	dst[i].r = ((pixel >> r_shift) & r_mask) * r_mul;
+	dst[i].g = ((pixel >> g_shift) & g_mask) * g_mul;
+	dst[i].b = ((pixel >> b_shift) & b_mask) * b_mul;
+    }
+}
+
+uint16_t
+pixman_float_to_unorm (float f, int n_bits)
+{
+    return float_to_unorm (f, n_bits);
+}
+
+float
+pixman_unorm_to_float (uint16_t u, int n_bits)
+{
+    return unorm_to_float (u, n_bits);
+}
+
+void
+pixman_contract_from_float (uint32_t     *dst,
+			    const argb_t *src,
+			    int           width)
+{
+    int i;
+
+    for (i = 0; i < width; ++i)
+    {
+	uint32_t a, r, g, b;
+
+	a = float_to_unorm (src[i].a, 8);
+	r = float_to_unorm (src[i].r, 8);
+	g = float_to_unorm (src[i].g, 8);
+	b = float_to_unorm (src[i].b, 8);
+
+	dst[i] = (a << 24) | (r << 16) | (g << 8) | (b << 0);
+    }
+}
+
+uint32_t *
+_pixman_iter_get_scanline_noop (pixman_iter_t *iter, const uint32_t *mask)
+{
+    return iter->buffer;
+}
+
+void
+_pixman_iter_init_bits_stride (pixman_iter_t *iter, const pixman_iter_info_t *info)
+{
+    pixman_image_t *image = iter->image;
+    uint8_t *b = (uint8_t *)image->bits.bits;
+    int s = image->bits.rowstride * 4;
+
+    iter->bits = b + s * iter->y + iter->x * PIXMAN_FORMAT_BPP (info->format) / 8;
+    iter->stride = s;
+}
+
+#define N_TMP_BOXES (16)
+
+pixman_bool_t
+pixman_region16_copy_from_region32 (pixman_region16_t *dst,
+                                    pixman_region32_t *src)
+{
+    int n_boxes, i;
+    pixman_box32_t *boxes32;
+    pixman_box16_t *boxes16;
+    pixman_bool_t retval;
+
+    boxes32 = pixman_region32_rectangles (src, &n_boxes);
+
+    boxes16 = pixman_malloc_ab (n_boxes, sizeof (pixman_box16_t));
+
+    if (!boxes16)
+	return FALSE;
+
+    for (i = 0; i < n_boxes; ++i)
+    {
+	boxes16[i].x1 = boxes32[i].x1;
+	boxes16[i].y1 = boxes32[i].y1;
+	boxes16[i].x2 = boxes32[i].x2;
+	boxes16[i].y2 = boxes32[i].y2;
+    }
+
+    pixman_region_fini (dst);
+    retval = pixman_region_init_rects (dst, boxes16, n_boxes);
+    free (boxes16);
+    return retval;
+}
+
+pixman_bool_t
+pixman_region32_copy_from_region16 (pixman_region32_t *dst,
+                                    pixman_region16_t *src)
+{
+    int n_boxes, i;
+    pixman_box16_t *boxes16;
+    pixman_box32_t *boxes32;
+    pixman_box32_t tmp_boxes[N_TMP_BOXES];
+    pixman_bool_t retval;
+
+    boxes16 = pixman_region_rectangles (src, &n_boxes);
+
+    if (n_boxes > N_TMP_BOXES)
+	boxes32 = pixman_malloc_ab (n_boxes, sizeof (pixman_box32_t));
+    else
+	boxes32 = tmp_boxes;
+
+    if (!boxes32)
+	return FALSE;
+
+    for (i = 0; i < n_boxes; ++i)
+    {
+	boxes32[i].x1 = boxes16[i].x1;
+	boxes32[i].y1 = boxes16[i].y1;
+	boxes32[i].x2 = boxes16[i].x2;
+	boxes32[i].y2 = boxes16[i].y2;
+    }
+
+    pixman_region32_fini (dst);
+    retval = pixman_region32_init_rects (dst, boxes32, n_boxes);
+
+    if (boxes32 != tmp_boxes)
+	free (boxes32);
+
+    return retval;
+}
+
+/* This function is exported for the sake of the test suite and not part
+ * of the ABI.
+ */
+PIXMAN_EXPORT pixman_implementation_t *
+_pixman_internal_only_get_implementation (void)
+{
+    return get_implementation ();
+}
+
+void
+_pixman_log_error (const char *function, const char *message)
+{
+    static int n_messages = 0;
+
+    if (n_messages < 10)
+    {
+	fprintf (stderr,
+		 "*** BUG ***\n"
+		 "In %s: %s\n"
+		 "Set a breakpoint on '_pixman_log_error' to debug\n\n",
+                 function, message);
+
+	n_messages++;
+    }
+}