mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-11-09 18:30:08 +00:00
400 lines
14 KiB
C
400 lines
14 KiB
C
#include <gtk/gtk.h>
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static const char *format_name[] = {
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"BGRAp", "ARGBp", "RGBAp",
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"BGRA", "ARGB", "RGBA", "ABGR",
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"RGB", "BGR", NULL
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};
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static const char *
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format_to_string (GdkMemoryFormat format)
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{
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if (format < g_strv_length ((gchar **) format_name))
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return format_name[format];
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else
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return "ERROR";
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}
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/* Copied from gdkmemorytexture.c */
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static void
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convert_memcpy (guchar *dest_data,
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gsize dest_stride,
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const guchar *src_data,
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gsize src_stride,
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gsize width,
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gsize height)
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{
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gsize y;
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for (y = 0; y < height; y++)
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memcpy (dest_data + y * dest_stride, src_data + y * src_stride, 4 * width);
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}
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static void
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convert_memcpy3 (guchar *dest_data,
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gsize dest_stride,
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const guchar *src_data,
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gsize src_stride,
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gsize width,
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gsize height)
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{
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gsize y;
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for (y = 0; y < height; y++)
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memcpy (dest_data + y * dest_stride, src_data + y * src_stride, 3 * width);
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}
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#define SWIZZLE3(R,G,B) \
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static void \
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convert_swizzle ## R ## G ## B (guchar *dest_data, \
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gsize dest_stride, \
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const guchar *src_data, \
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gsize src_stride, \
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gsize width, \
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gsize height) \
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{ \
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gsize x, y; \
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\
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for (y = 0; y < height; y++) \
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{ \
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for (x = 0; x < width; x++) \
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{ \
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dest_data[3 * x + R] = src_data[3 * x + 0]; \
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dest_data[3 * x + G] = src_data[3 * x + 1]; \
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dest_data[3 * x + B] = src_data[3 * x + 2]; \
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} \
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\
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dest_data += dest_stride; \
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src_data += src_stride; \
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} \
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}
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SWIZZLE3(2,1,0)
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#define SWIZZLE(A,R,G,B) \
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static void \
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convert_swizzle ## A ## R ## G ## B (guchar *dest_data, \
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gsize dest_stride, \
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const guchar *src_data, \
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gsize src_stride, \
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gsize width, \
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gsize height) \
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{ \
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gsize x, y; \
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\
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for (y = 0; y < height; y++) \
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{ \
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for (x = 0; x < width; x++) \
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{ \
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dest_data[4 * x + A] = src_data[4 * x + 0]; \
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dest_data[4 * x + R] = src_data[4 * x + 1]; \
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dest_data[4 * x + G] = src_data[4 * x + 2]; \
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dest_data[4 * x + B] = src_data[4 * x + 3]; \
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} \
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\
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dest_data += dest_stride; \
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src_data += src_stride; \
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} \
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}
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SWIZZLE(3,2,1,0)
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SWIZZLE(2,1,0,3)
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SWIZZLE(3,0,1,2)
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SWIZZLE(1,2,3,0)
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#define SWIZZLE_OPAQUE(A,R,G,B) \
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static void \
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convert_swizzle_opaque_## A ## R ## G ## B (guchar *dest_data, \
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gsize dest_stride, \
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const guchar *src_data, \
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gsize src_stride, \
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gsize width, \
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gsize height) \
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{ \
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gsize x, y; \
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\
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for (y = 0; y < height; y++) \
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{ \
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for (x = 0; x < width; x++) \
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{ \
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dest_data[4 * x + A] = 0xFF; \
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dest_data[4 * x + R] = src_data[3 * x + 0]; \
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dest_data[4 * x + G] = src_data[3 * x + 1]; \
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dest_data[4 * x + B] = src_data[3 * x + 2]; \
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} \
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\
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dest_data += dest_stride; \
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src_data += src_stride; \
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} \
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}
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SWIZZLE_OPAQUE(3,2,1,0)
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SWIZZLE_OPAQUE(3,0,1,2)
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SWIZZLE_OPAQUE(0,1,2,3)
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SWIZZLE_OPAQUE(0,3,2,1)
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#define PREMULTIPLY(d,c,a) G_STMT_START { guint t = c * a + 0x80; d = ((t >> 8) + t) >> 8; } G_STMT_END
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#define SWIZZLE_PREMULTIPLY(A,R,G,B, A2,R2,G2,B2) \
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static void \
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convert_swizzle_premultiply_ ## A ## R ## G ## B ## _ ## A2 ## R2 ## G2 ## B2 \
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(guchar *dest_data, \
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gsize dest_stride, \
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const guchar *src_data, \
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gsize src_stride, \
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gsize width, \
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gsize height) \
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{ \
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gsize x, y; \
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\
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for (y = 0; y < height; y++) \
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{ \
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for (x = 0; x < width; x++) \
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{ \
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dest_data[4 * x + A] = src_data[4 * x + A2]; \
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PREMULTIPLY(dest_data[4 * x + R], src_data[4 * x + R2], src_data[4 * x + A2]); \
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PREMULTIPLY(dest_data[4 * x + G], src_data[4 * x + G2], src_data[4 * x + A2]); \
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PREMULTIPLY(dest_data[4 * x + B], src_data[4 * x + B2], src_data[4 * x + A2]); \
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} \
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\
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dest_data += dest_stride; \
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src_data += src_stride; \
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} \
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}
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SWIZZLE_PREMULTIPLY (3,2,1,0, 3,2,1,0)
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SWIZZLE_PREMULTIPLY (0,1,2,3, 3,2,1,0)
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SWIZZLE_PREMULTIPLY (3,2,1,0, 0,1,2,3)
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SWIZZLE_PREMULTIPLY (0,1,2,3, 0,1,2,3)
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SWIZZLE_PREMULTIPLY (3,2,1,0, 3,0,1,2)
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SWIZZLE_PREMULTIPLY (0,1,2,3, 3,0,1,2)
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SWIZZLE_PREMULTIPLY (3,2,1,0, 0,3,2,1)
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SWIZZLE_PREMULTIPLY (0,1,2,3, 0,3,2,1)
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SWIZZLE_PREMULTIPLY (3,0,1,2, 3,2,1,0)
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SWIZZLE_PREMULTIPLY (3,0,1,2, 0,1,2,3)
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SWIZZLE_PREMULTIPLY (3,0,1,2, 3,0,1,2)
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SWIZZLE_PREMULTIPLY (3,0,1,2, 0,3,2,1)
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typedef void (* ConversionFunc) (guchar *dest_data,
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gsize dest_stride,
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const guchar *src_data,
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gsize src_stride,
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gsize width,
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gsize height);
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static ConversionFunc converters[GDK_MEMORY_N_FORMATS][GDK_MEMORY_N_FORMATS] =
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{
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{ convert_memcpy, convert_swizzle3210, convert_swizzle2103, NULL, NULL, NULL, NULL, NULL, NULL },
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{ convert_swizzle3210, convert_memcpy, convert_swizzle3012, NULL, NULL, NULL, NULL, NULL, NULL },
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{ convert_swizzle2103, convert_swizzle1230, convert_memcpy, NULL, NULL, NULL, NULL, NULL, NULL },
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{ convert_swizzle_premultiply_3210_3210, convert_swizzle_premultiply_0123_3210, convert_swizzle_premultiply_3012_3210, convert_memcpy, NULL, NULL, NULL, NULL, NULL },
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{ convert_swizzle_premultiply_3210_0123, convert_swizzle_premultiply_0123_0123, convert_swizzle_premultiply_3012_0123, NULL, convert_memcpy, NULL, NULL, NULL, NULL },
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{ convert_swizzle_premultiply_3210_3012, convert_swizzle_premultiply_0123_3012, convert_swizzle_premultiply_3012_3012, convert_swizzle2103, convert_swizzle1230, convert_memcpy, convert_swizzle3210, NULL, NULL },
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{ convert_swizzle_premultiply_3210_0321, convert_swizzle_premultiply_0123_0321, convert_swizzle_premultiply_3012_0321, NULL, NULL, NULL, convert_memcpy, NULL, NULL },
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{ convert_swizzle_opaque_3210, convert_swizzle_opaque_0123, convert_swizzle_opaque_3012, NULL, NULL, NULL, NULL, convert_memcpy3, convert_swizzle210 },
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{ convert_swizzle_opaque_3012, convert_swizzle_opaque_0321, convert_swizzle_opaque_3210, NULL, NULL, NULL, NULL, convert_swizzle210, convert_memcpy3 },
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};
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static void
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gdk_memory_convert (guchar *dest_data,
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gsize dest_stride,
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GdkMemoryFormat dest_format,
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const guchar *src_data,
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gsize src_stride,
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GdkMemoryFormat src_format,
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gsize width,
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gsize height)
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{
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g_assert (dest_format < GDK_MEMORY_N_FORMATS);
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g_assert (src_format < GDK_MEMORY_N_FORMATS);
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if (converters[src_format][dest_format] == NULL)
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g_error ("Conversion from %s to %s not supported", format_to_string (src_format), format_to_string (dest_format));
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converters[src_format][dest_format] (dest_data, dest_stride, src_data, src_stride, width, height);
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}
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/* End of copied code */
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static GdkTexture *
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make_texture (GdkMemoryFormat format,
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int padding,
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int *out_stride,
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int *out_bpp)
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{
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GdkPixbuf *source;
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GdkMemoryFormat source_format;
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int width, height, stride, bpp;
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guchar *data;
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GBytes *bytes;
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GdkTexture *texture;
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GError *error = NULL;
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width = height = 200;
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source = gdk_pixbuf_new_from_file_at_scale ("tests/portland-rose.jpg",
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width, height, TRUE,
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&error);
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if (!source)
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g_error ("%s", error->message);
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source_format = GDK_MEMORY_R8G8B8;
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bpp = 3;
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if (format != GDK_MEMORY_R8G8B8 && format != GDK_MEMORY_B8G8R8)
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{
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bpp = 4;
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/* add an alpha channel with 50% alpha */
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GdkPixbuf *pb = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, width, height);
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gdk_pixbuf_composite (source, pb, 0, 0, width, height, 0, 0, 1, 1, GDK_INTERP_BILINEAR, 128);
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g_object_unref (source);
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source = pb;
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source_format = GDK_MEMORY_R8G8B8A8;
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}
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stride = bpp * width + padding;
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data = g_new0 (guchar, stride * height);
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gdk_memory_convert (data, stride, format,
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gdk_pixbuf_get_pixels (source),
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gdk_pixbuf_get_rowstride (source),
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source_format,
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width, height);
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g_object_unref (source);
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bytes = g_bytes_new_take (data, stride * height);
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texture = gdk_memory_texture_new (width, height, format, bytes, stride);
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g_bytes_unref (bytes);
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*out_stride = stride;
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*out_bpp = bpp;
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return texture;
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}
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static void
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update_picture (GtkWidget *picture)
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{
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GdkMemoryFormat format;
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int padding;
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GdkTexture *texture;
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GtkLabel *label;
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char *text;
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int stride;
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int bpp;
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format = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (picture), "format"));
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padding = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (picture), "padding"));
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texture = make_texture (format, padding, &stride, &bpp);
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gtk_picture_set_paintable (GTK_PICTURE (picture), GDK_PAINTABLE (texture));
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label = GTK_LABEL (g_object_get_data (G_OBJECT (picture), "size_label"));
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text = g_strdup_printf ("%d x %d @ %d",
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gdk_texture_get_width (texture),
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gdk_texture_get_height (texture),
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bpp);
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gtk_label_set_label (label, text);
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g_free (text);
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label = GTK_LABEL (g_object_get_data (G_OBJECT (picture), "stride_label"));
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text = g_strdup_printf ("%d", stride);
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gtk_label_set_label (label, text);
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g_free (text);
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g_object_unref (texture);
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}
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static void
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update_format (GtkDropDown *dropdown,
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GParamSpec *pspec,
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GtkWidget *picture)
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{
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g_object_set_data (G_OBJECT (picture), "format", GINT_TO_POINTER (gtk_drop_down_get_selected (dropdown)));
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update_picture (picture);
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}
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static void
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update_padding (GtkSpinButton *spinbutton,
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GParamSpec *pspec,
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GtkWidget *picture)
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{
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g_object_set_data (G_OBJECT (picture), "padding", GINT_TO_POINTER (gtk_spin_button_get_value_as_int (spinbutton)));
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update_picture (picture);
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}
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static void
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add_to_grid (GtkWidget *grid,
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int left,
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int top,
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GdkMemoryFormat format,
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int padding)
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{
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GtkWidget *dropdown, *spin, *picture, *label;
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picture = gtk_picture_new ();
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gtk_grid_attach (GTK_GRID (grid), picture, left + 2, top + 0, 1, 4);
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g_object_set_data (G_OBJECT (picture), "format", GINT_TO_POINTER (format));
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g_object_set_data (G_OBJECT (picture), "padding", GINT_TO_POINTER (padding));
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dropdown = gtk_drop_down_new_from_strings (format_name);
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gtk_widget_set_valign (dropdown, GTK_ALIGN_CENTER);
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gtk_drop_down_set_selected (GTK_DROP_DOWN (dropdown), format);
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g_signal_connect (dropdown, "notify::selected", G_CALLBACK (update_format), picture);
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gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Format"), left, top, 1, 1);
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gtk_grid_attach (GTK_GRID (grid), dropdown, left + 1, top, 1, 1);
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spin = gtk_spin_button_new_with_range (0, 10, 1);
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gtk_widget_set_valign (spin, GTK_ALIGN_CENTER);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (spin), padding);
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g_signal_connect (spin, "notify::value", G_CALLBACK (update_padding), picture);
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gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Padding"), left, top + 1, 1, 1);
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gtk_grid_attach (GTK_GRID (grid), spin, left + 1, top + 1, 1, 1);
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label = gtk_label_new ("");
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gtk_label_set_xalign (GTK_LABEL (label), 0);
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g_object_set_data (G_OBJECT (picture), "size_label", label);
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gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Size"), left, top + 2, 1, 1);
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gtk_grid_attach (GTK_GRID (grid), label, left + 1, top + 2, 1, 1);
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label = gtk_label_new ("");
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gtk_label_set_xalign (GTK_LABEL (label), 0);
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g_object_set_data (G_OBJECT (picture), "stride_label", label);
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gtk_grid_attach (GTK_GRID (grid), gtk_label_new ("Stride"), left, top + 3, 1, 1);
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gtk_grid_attach (GTK_GRID (grid), label, left + 1, top + 3, 1, 1);
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update_picture (picture);
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}
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int
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main (int argc, char *argv[])
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{
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GtkWidget *window, *grid;
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gtk_init ();
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window = gtk_window_new ();
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grid = gtk_grid_new ();
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gtk_widget_set_margin_top (grid, 10);
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gtk_widget_set_margin_bottom (grid, 10);
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gtk_widget_set_margin_start (grid, 10);
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gtk_widget_set_margin_end (grid, 10);
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gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
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gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
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gtk_window_set_child (GTK_WINDOW (window), grid);
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add_to_grid (grid, 0, 0, GDK_MEMORY_R8G8B8, 0);
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gtk_window_present (GTK_WINDOW (window));
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while (g_list_model_get_n_items (gtk_window_get_toplevels ()) > 0)
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g_main_context_iteration (NULL, TRUE);
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return 0;
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}
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