Add four new test to exercise interactions of native and fallback objects

The new tests are: over-above-source, over-around-source, over-below-source,
and over-between-source

test/.gitignore

@@ -86,6 +86,10 @@ new-sub-path
 nil-surface
 operator-clear
 operator-source
+over-above-source
+over-around-source
+over-below-source
+over-between-source
 paint
 paint-repeat
 paint-source-alpha

test/Makefile.am

@@ -66,6 +66,10 @@ new-sub-path			\
 nil-surface			\
 operator-clear			\
 operator-source			\
+over-above-source		\
+over-around-source		\
+over-below-source		\
+over-between-source		\
 paint				\
 paint-repeat			\
 paint-source-alpha		\

test/over-above-source.c

@@ -0,0 +1,80 @@
+/*
+ * Copyright © 2007 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Carl D. Worth <cworth@cworth.org>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_draw_function_t draw;
+
+#define SIZE 40
+#define PAD 2
+#define WIDTH (PAD + SIZE + PAD)
+#define HEIGHT WIDTH
+
+/* This test is designed to explore the interactions of "native" and
+ * "fallback" objects. For the ps surface, OVER with non-1.0 opacity
+ * will be a fallback while SOURCE will be native. For the pdf
+ * surface, it's the reverse where OVER is native while SOURCE is a
+ * fallback. */
+
+cairo_test_t test = {
+    "over-above-source",
+    "A simple test drawing a circle with OVER after a triangle drawn with SOURCE",
+    WIDTH, HEIGHT,
+    draw
+};
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_translate (cr, PAD, PAD);
+
+    /* A red triangle with SOURCE */
+    cairo_move_to     (cr,  SIZE / 2, SIZE / 2);
+    cairo_rel_line_to (cr,  SIZE / 2, 0);
+    cairo_rel_line_to (cr, -SIZE / 2, SIZE / 2);
+    cairo_close_path (cr);
+
+    cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+    cairo_set_source_rgba (cr, 1., 0., 0., 0.5); /* 50% red */
+
+    cairo_fill (cr);
+
+    /* A green circle with OVER */
+    cairo_arc (cr, SIZE / 2, SIZE / 2, SIZE / 4, 0., 2. * M_PI);
+
+    cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+    cairo_set_source_rgba (cr, 0., 1., 0., 0.5); /* 50% green */
+
+    cairo_fill (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}

test/over-around-source.c

@@ -0,0 +1,91 @@
+/*
+ * Copyright © 2007 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Carl D. Worth <cworth@cworth.org>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_draw_function_t draw;
+
+#define SIZE 40
+#define PAD 2
+#define WIDTH (PAD + SIZE + PAD)
+#define HEIGHT WIDTH
+
+/* This test is designed to explore the interactions of "native" and
+ * "fallback" objects. For the ps surface, OVER with non-1.0 opacity
+ * will be a fallback while SOURCE will be native. For the pdf
+ * surface, it's the reverse where OVER is native while SOURCE is a
+ * fallback. */
+
+cairo_test_t test = {
+    "over-around-source",
+    "A simple test drawing a triangle with SOURCE between two circles drawn with OVER",
+    WIDTH, HEIGHT,
+    draw
+};
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_translate (cr, PAD, PAD);
+
+    /* A green triangle with OVER */
+    cairo_move_to     (cr,  SIZE / 5, SIZE / 5);
+    cairo_rel_line_to (cr,  SIZE / 2, 0);
+    cairo_rel_line_to (cr, -SIZE / 2, SIZE / 2);
+    cairo_close_path (cr);
+
+    cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+    cairo_set_source_rgba (cr, 0., 1., 0., 0.5); /* 50% green */
+
+    cairo_fill (cr);
+
+    /* A red circle with SOURCE */
+    cairo_arc (cr, SIZE / 2, SIZE / 2, SIZE / 4, 0., 2. * M_PI);
+
+    cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+    cairo_set_source_rgba (cr, 1., 0., 0., 0.5); /* 50% red */
+
+    cairo_fill (cr);
+
+    /* Another green triangle with OVER */
+    cairo_move_to     (cr,  SIZE / 2, SIZE / 2);
+    cairo_rel_line_to (cr,  SIZE / 2, 0);
+    cairo_rel_line_to (cr, -SIZE / 2, SIZE / 2);
+    cairo_close_path (cr);
+
+    cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+    cairo_set_source_rgba (cr, 0., 1., 0., 0.5); /* 50% green */
+
+    cairo_fill (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}

test/over-below-source.c

@@ -0,0 +1,80 @@
+/*
+ * Copyright © 2007 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Carl D. Worth <cworth@cworth.org>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_draw_function_t draw;
+
+#define SIZE 40
+#define PAD 2
+#define WIDTH (PAD + SIZE + PAD)
+#define HEIGHT WIDTH
+
+/* This test is designed to explore the interactions of "native" and
+ * "fallback" objects. For the ps surface, OVER with non-1.0 opacity
+ * will be a fallback while SOURCE will be native. For the pdf
+ * surface, it's the reverse where OVER is native while SOURCE is a
+ * fallback. */
+
+cairo_test_t test = {
+    "over-below-source",
+    "A simple test drawing a circle with OVER before a triangle drawn with SOURCE",
+    WIDTH, HEIGHT,
+    draw
+};
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_translate (cr, PAD, PAD);
+
+    /* A green circle with OVER */
+    cairo_arc (cr, SIZE / 2, SIZE / 2, SIZE / 4, 0., 2. * M_PI);
+
+    cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+    cairo_set_source_rgba (cr, 0., 1., 0., 0.5); /* 50% green */
+
+    cairo_fill (cr);
+
+    /* A red triangle with SOURCE */
+    cairo_move_to (cr, SIZE / 2, SIZE / 2);
+    cairo_line_to (cr, SIZE,     SIZE / 2);
+    cairo_line_to (cr, SIZE / 2, SIZE);
+    cairo_close_path (cr);
+
+    cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+    cairo_set_source_rgba (cr, 1., 0., 0., 0.5); /* 50% red */
+
+    cairo_fill (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}

test/over-between-source.c

@@ -0,0 +1,91 @@
+/*
+ * Copyright © 2007 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Carl D. Worth <cworth@cworth.org>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_draw_function_t draw;
+
+#define SIZE 40
+#define PAD 2
+#define WIDTH (PAD + SIZE + PAD)
+#define HEIGHT WIDTH
+
+/* This test is designed to explore the interactions of "native" and
+ * "fallback" objects. For the ps surface, OVER with non-1.0 opacity
+ * will be a fallback while SOURCE will be native. For the pdf
+ * surface, it's the reverse where OVER is native while SOURCE is a
+ * fallback. */
+
+cairo_test_t test = {
+    "over-between-source",
+    "A simple test drawing a circle with OVER between two triangles drawn with SOURCE",
+    WIDTH, HEIGHT,
+    draw
+};
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_translate (cr, PAD, PAD);
+
+    /* A red triangle with SOURCE */
+    cairo_move_to     (cr,  SIZE / 5, SIZE / 5);
+    cairo_rel_line_to (cr,  SIZE / 2, 0);
+    cairo_rel_line_to (cr, -SIZE / 2, SIZE / 2);
+    cairo_close_path (cr);
+
+    cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+    cairo_set_source_rgba (cr, 1., 0., 0., 0.5); /* 50% red */
+
+    cairo_fill (cr);
+
+    /* A green circle with OVER */
+    cairo_arc (cr, SIZE / 2, SIZE / 2, SIZE / 4, 0., 2. * M_PI);
+
+    cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+    cairo_set_source_rgba (cr, 0., 1., 0., 0.5); /* 50% green */
+
+    cairo_fill (cr);
+
+    /* Another red triangle with SOURCE */
+    cairo_move_to     (cr,  SIZE / 2, SIZE / 2);
+    cairo_rel_line_to (cr,  SIZE / 2, 0);
+    cairo_rel_line_to (cr, -SIZE / 2, SIZE / 2);
+    cairo_close_path (cr);
+
+    cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+    cairo_set_source_rgba (cr, 1., 0., 0., 0.5); /* 50% red */
+
+    cairo_fill (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}