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-rw-r--r--pixman/demos/Makefile.am2
-rw-r--r--pixman/demos/composite-test.c2
-rw-r--r--pixman/demos/gtk-utils.c51
-rw-r--r--pixman/demos/gtk-utils.h1
-rw-r--r--pixman/demos/srgb-test.c9
-rw-r--r--pixman/demos/srgb-trap-test.c119
6 files changed, 158 insertions, 26 deletions
diff --git a/pixman/demos/Makefile.am b/pixman/demos/Makefile.am
index d8fb0dab2..f324f5f5b 100644
--- a/pixman/demos/Makefile.am
+++ b/pixman/demos/Makefile.am
@@ -21,6 +21,7 @@ DEMOS = \
tri-test \
quad2quad \
checkerboard \
+ srgb-trap-test \
srgb-test
EXTRA_DIST = parrot.c parrot.jpg
@@ -37,6 +38,7 @@ radial_test_SOURCES = radial-test.c $(GTK_UTILS)
tri_test_SOURCES = tri-test.c $(GTK_UTILS)
checkerboard_SOURCES = checkerboard.c $(GTK_UTILS)
srgb_test_SOURCES = srgb-test.c $(GTK_UTILS)
+srgb_trap_test_SOURCES = srgb-trap-test.c $(GTK_UTILS)
noinst_PROGRAMS = $(DEMOS)
diff --git a/pixman/demos/composite-test.c b/pixman/demos/composite-test.c
index dc24f8ef1..8213e2f9d 100644
--- a/pixman/demos/composite-test.c
+++ b/pixman/demos/composite-test.c
@@ -149,7 +149,7 @@ main (int argc, char **argv)
0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
pixman_image_composite (operators[i].op, parrot, NULL, dest_img,
0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
- pixbuf = pixbuf_from_argb32 (pixman_image_get_data (dest_img), TRUE,
+ pixbuf = pixbuf_from_argb32 (pixman_image_get_data (dest_img),
WIDTH, HEIGHT, WIDTH * 4);
image = gtk_image_new_from_pixbuf (pixbuf);
gtk_box_pack_start (GTK_BOX (vbox), image, FALSE, FALSE, 0);
diff --git a/pixman/demos/gtk-utils.c b/pixman/demos/gtk-utils.c
index 1ff89ebd3..8291a1ed2 100644
--- a/pixman/demos/gtk-utils.c
+++ b/pixman/demos/gtk-utils.c
@@ -5,7 +5,6 @@
GdkPixbuf *
pixbuf_from_argb32 (uint32_t *bits,
- gboolean has_alpha,
int width,
int height,
int stride)
@@ -47,12 +46,12 @@ show_image (pixman_image_t *image)
{
GtkWidget *window;
GdkPixbuf *pixbuf;
- int width, height, stride;
+ int width, height;
int argc;
char **argv;
char *arg0 = g_strdup ("pixman-test-program");
- gboolean has_alpha;
pixman_format_code_t format;
+ pixman_image_t *copy;
argc = 1;
argv = (char **)&arg0;
@@ -62,21 +61,43 @@ show_image (pixman_image_t *image)
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
width = pixman_image_get_width (image);
height = pixman_image_get_height (image);
- stride = pixman_image_get_stride (image);
gtk_window_set_default_size (GTK_WINDOW (window), width, height);
-
+
format = pixman_image_get_format (image);
-
- if (format == PIXMAN_a8r8g8b8)
- has_alpha = TRUE;
- else if (format == PIXMAN_x8r8g8b8)
- has_alpha = FALSE;
- else
- g_error ("Can't deal with this format: %x\n", format);
-
- pixbuf = pixbuf_from_argb32 (pixman_image_get_data (image), has_alpha,
- width, height, stride);
+
+ /* Three cases:
+ *
+ * - image is a8r8g8b8_sRGB: we will display without modification
+ * under the assumption that the monitor is sRGB
+ *
+ * - image is a8r8g8b8: we will display without modification
+ * under the assumption that whoever created the image
+ * probably did it wrong by using sRGB inputs
+ *
+ * - other: we will convert to a8r8g8b8 under the assumption that
+ * whoever created the image probably did it wrong.
+ */
+ switch (format)
+ {
+ case PIXMAN_a8r8g8b8_sRGB:
+ case PIXMAN_a8r8g8b8:
+ copy = pixman_image_ref (image);
+ break;
+
+ default:
+ copy = pixman_image_create_bits (PIXMAN_a8r8g8b8,
+ width, height, NULL, -1);
+ pixman_image_composite32 (PIXMAN_OP_SRC,
+ image, NULL, copy,
+ 0, 0, 0, 0, 0, 0,
+ width, height);
+ break;
+ }
+
+ pixbuf = pixbuf_from_argb32 (pixman_image_get_data (copy),
+ width, height,
+ pixman_image_get_stride (copy));
g_signal_connect (window, "expose_event", G_CALLBACK (on_expose), pixbuf);
g_signal_connect (window, "delete_event", G_CALLBACK (gtk_main_quit), NULL);
diff --git a/pixman/demos/gtk-utils.h b/pixman/demos/gtk-utils.h
index 2cb13bcf0..55cb7018a 100644
--- a/pixman/demos/gtk-utils.h
+++ b/pixman/demos/gtk-utils.h
@@ -7,7 +7,6 @@
void show_image (pixman_image_t *image);
GdkPixbuf *pixbuf_from_argb32 (uint32_t *bits,
- gboolean has_alpha,
int width,
int height,
int stride);
diff --git a/pixman/demos/srgb-test.c b/pixman/demos/srgb-test.c
index bc073491e..681d52181 100644
--- a/pixman/demos/srgb-test.c
+++ b/pixman/demos/srgb-test.c
@@ -79,15 +79,6 @@ main (int argc, char **argv)
pixman_image_unref (src1_img);
free (src1);
- pixman_image_unref (dest_img);
-
- /* Now that the picture has been correctly constructed,
- * we hand it over to our support library as argb which it
- * knows how to handle (it doesn't understand _sRGB format). */
- dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8,
- WIDTH, HEIGHT,
- dest,
- WIDTH * 4);
show_image (dest_img);
pixman_image_unref (dest_img);
free (dest);
diff --git a/pixman/demos/srgb-trap-test.c b/pixman/demos/srgb-trap-test.c
new file mode 100644
index 000000000..d5ae16a06
--- /dev/null
+++ b/pixman/demos/srgb-trap-test.c
@@ -0,0 +1,119 @@
+#include <math.h>
+#include "pixman.h"
+#include "gtk-utils.h"
+
+#define F(x) \
+ pixman_double_to_fixed (x)
+
+#define WIDTH 600
+#define HEIGHT 300
+
+static uint16_t
+convert_to_srgb (uint16_t in)
+{
+ double d = in * (1/65535.0);
+ double a = 0.055;
+
+ if (d < 0.0031308)
+ d = 12.92 * d;
+ else
+ d = (1 + a) * pow (d, 1 / 2.4) - a;
+
+ return (d * 65535.0) + 0.5;
+}
+
+static void
+convert_color (pixman_color_t *dest_srgb, pixman_color_t *linear)
+{
+ dest_srgb->alpha = convert_to_srgb (linear->alpha);
+ dest_srgb->red = convert_to_srgb (linear->red);
+ dest_srgb->green = convert_to_srgb (linear->green);
+ dest_srgb->blue = convert_to_srgb (linear->blue);
+}
+
+int
+main (int argc, char **argv)
+{
+ static const pixman_trapezoid_t traps[] =
+ {
+ { F(10.10), F(280.0),
+ { { F(20.0), F(10.10) },
+ { F(5.3), F(280.0) } },
+ { { F(20.3), F(10.10) },
+ { F(5.6), F(280.0) } }
+ },
+ { F(10.10), F(280.0),
+ { { F(40.0), F(10.10) },
+ { F(15.3), F(280.0) } },
+ { { F(41.0), F(10.10) },
+ { F(16.3), F(280.0) } }
+ },
+ { F(10.10), F(280.0),
+ { { F(120.0), F(10.10) },
+ { F(5.3), F(280.0) } },
+ { { F(128.3), F(10.10) },
+ { F(6.6), F(280.0) } }
+ },
+ { F(10.10), F(280.0),
+ { { F(60.0), F(10.10) },
+ { F(25.3), F(280.0) } },
+ { { F(61.0), F(10.10) },
+ { F(26.3), F(280.0) } }
+ },
+ { F(10.10), F(280.0),
+ { { F(90.0), F(10.10) },
+ { F(55.3), F(280.0) } },
+ { { F(93.0), F(10.10) },
+ { F(58.3), F(280.0) } }
+ },
+ { F(130.10), F(150.0),
+ { { F(100.0), F(130.10) },
+ { F(250.3), F(150.0) } },
+ { { F(110.0), F(130.10) },
+ { F(260.3), F(150.0) } }
+ },
+ { F(170.10), F(240.0),
+ { { F(100.0), F(170.10) },
+ { F(120.3), F(240.0) } },
+ { { F(250.0), F(170.10) },
+ { F(250.3), F(240.0) } }
+ },
+ };
+
+ pixman_image_t *src, *dest_srgb, *dest_linear;
+ pixman_color_t bg = { 0x0000, 0x0000, 0x0000, 0xffff };
+ pixman_color_t fg = { 0xffff, 0xffff, 0xffff, 0xffff };
+ pixman_color_t fg_srgb;
+ uint32_t *d;
+
+ d = malloc (WIDTH * HEIGHT * 4);
+
+ dest_srgb = pixman_image_create_bits (
+ PIXMAN_a8r8g8b8_sRGB, WIDTH, HEIGHT, d, WIDTH * 4);
+ dest_linear = pixman_image_create_bits (
+ PIXMAN_a8r8g8b8, WIDTH, HEIGHT, d, WIDTH * 4);
+
+ src = pixman_image_create_solid_fill (&bg);
+ pixman_image_composite32 (PIXMAN_OP_SRC,
+ src, NULL, dest_srgb,
+ 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
+
+ src = pixman_image_create_solid_fill (&fg);
+
+ pixman_composite_trapezoids (PIXMAN_OP_OVER,
+ src, dest_srgb, PIXMAN_a8,
+ 0, 0, 10, 10, G_N_ELEMENTS (traps), traps);
+
+ convert_color (&fg_srgb, &fg);
+ src = pixman_image_create_solid_fill (&fg_srgb);
+
+ pixman_composite_trapezoids (PIXMAN_OP_OVER,
+ src, dest_linear, PIXMAN_a8,
+ 0, 0, 310, 10, G_N_ELEMENTS (traps), traps);
+
+ show_image (dest_linear);
+ pixman_image_unref(dest_linear);
+ free(d);
+
+ return 0;
+}
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