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https://github.com/brl/mutter.git
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271 lines
6.6 KiB
C
271 lines
6.6 KiB
C
#include <glib.h>
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#include <gmodule.h>
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#include <stdlib.h>
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#include <clutter/clutter.h>
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#include <cogl/cogl.h>
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/* Coglbox declaration
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*--------------------------------------------------*/
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G_BEGIN_DECLS
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#define TEST_TYPE_COGLBOX test_coglbox_get_type()
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#define TEST_COGLBOX(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), \
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TEST_TYPE_COGLBOX, TestCoglboxClass))
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#define TEST_COGLBOX_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), \
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TEST_TYPE_COGLBOX, TestCoglboxClass))
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#define TEST_IS_COGLBOX(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
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TEST_TYPE_COGLBOX))
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#define TEST_IS_COGLBOX_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), \
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TEST_TYPE_COGLBOX))
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#define TEST_COGLBOX_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj), \
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TEST_TYPE_COGLBOX, TestCoglboxClass))
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typedef struct _TestCoglbox TestCoglbox;
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typedef struct _TestCoglboxClass TestCoglboxClass;
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typedef struct _TestCoglboxPrivate TestCoglboxPrivate;
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struct _TestCoglbox
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{
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ClutterActor parent;
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/*< private >*/
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TestCoglboxPrivate *priv;
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};
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struct _TestCoglboxClass
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{
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ClutterActorClass parent_class;
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/* padding for future expansion */
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void (*_test_coglbox1) (void);
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void (*_test_coglbox2) (void);
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void (*_test_coglbox3) (void);
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void (*_test_coglbox4) (void);
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};
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static GType test_coglbox_get_type (void) G_GNUC_CONST;
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G_END_DECLS
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/* Coglbox private declaration
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*--------------------------------------------------*/
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G_DEFINE_TYPE (TestCoglbox, test_coglbox, CLUTTER_TYPE_ACTOR);
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#define TEST_COGLBOX_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), TEST_TYPE_COGLBOX, TestCoglboxPrivate))
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struct _TestCoglboxPrivate
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{
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CoglHandle cogl_tex_id[4];
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};
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/* Coglbox implementation
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*--------------------------------------------------*/
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static void
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test_coglbox_paint(ClutterActor *self)
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{
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TestCoglboxPrivate *priv = TEST_COGLBOX_GET_PRIVATE (self);
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gfloat texcoords[4] = { 0.0f, 0.0f, 1.0f, 1.0f };
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cogl_set_source_color4ub (0x66, 0x66, 0xdd, 0xff);
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cogl_rectangle (0, 0, 400, 400);
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cogl_push_matrix ();
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cogl_translate (100, 100, 0);
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cogl_set_source_texture (priv->cogl_tex_id[1]);
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cogl_rectangle_with_texture_coords (0, 0, 200, 213,
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texcoords[0], texcoords[1],
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texcoords[2], texcoords[3]);
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cogl_pop_matrix();
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}
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static void
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test_coglbox_finalize (GObject *object)
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{
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G_OBJECT_CLASS (test_coglbox_parent_class)->finalize (object);
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}
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static void
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test_coglbox_dispose (GObject *object)
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{
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TestCoglboxPrivate *priv;
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priv = TEST_COGLBOX_GET_PRIVATE (object);
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cogl_handle_unref (priv->cogl_tex_id);
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G_OBJECT_CLASS (test_coglbox_parent_class)->dispose (object);
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}
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static void
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test_coglbox_init (TestCoglbox *self)
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{
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TestCoglboxPrivate *priv;
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guint width;
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guint height;
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guint rowstride;
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CoglPixelFormat format;
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gint size;
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guchar *data;
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gint x,y,t;
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guchar *pixel;
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gchar *file;
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self->priv = priv = TEST_COGLBOX_GET_PRIVATE(self);
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/* Load image from file */
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file = g_build_filename (TESTS_DATADIR, "redhand.png", NULL);
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priv->cogl_tex_id[0] =
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cogl_texture_new_from_file (file,
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COGL_TEXTURE_NONE,
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COGL_PIXEL_FORMAT_ANY,
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NULL);
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if (priv->cogl_tex_id[0] == COGL_INVALID_HANDLE)
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{
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printf ("Failed loading redhand.png image!\n");
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return;
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}
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g_free (file);
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printf("Texture loaded from file.\n");
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/* Obtain pixel data */
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format = cogl_texture_get_format (priv->cogl_tex_id[0]);
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g_assert(format == COGL_PIXEL_FORMAT_RGBA_8888_PRE ||
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format == COGL_PIXEL_FORMAT_ARGB_8888_PRE);
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width = cogl_texture_get_width (priv->cogl_tex_id[0]);
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height = cogl_texture_get_height (priv->cogl_tex_id[0]);
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size = cogl_texture_get_data (priv->cogl_tex_id[0],
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format, 0, NULL);
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printf("size: %dx%d\n", width, height);
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printf("format: 0x%x\n", format);
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printf("bytesize: %d\n", size);
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data = (guchar*) g_malloc (sizeof(guchar) * size);
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cogl_texture_get_data (priv->cogl_tex_id[0],
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format, 0, data);
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rowstride = cogl_texture_get_rowstride (priv->cogl_tex_id[0]);
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/* Create new texture from modified data */
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priv->cogl_tex_id[1] =
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cogl_texture_new_from_data (width, height,
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COGL_TEXTURE_NONE,
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format, format,
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rowstride, data);
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if (priv->cogl_tex_id[1] == COGL_INVALID_HANDLE)
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{
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printf ("Failed creating image from data!\n");
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return;
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}
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printf ("Texture created from data.\n");
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/* Modify data (swap red and green) */
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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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pixel = data + y * rowstride + x * 4;
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if (format == COGL_PIXEL_FORMAT_RGBA_8888_PRE)
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{
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t = pixel[0];
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pixel[0] = pixel[1];
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pixel[1] = t;
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}
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else
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{
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t = pixel[1];
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pixel[1] = pixel[2];
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pixel[2] = t;
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}
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}
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}
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cogl_texture_set_region (priv->cogl_tex_id[1],
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0, 0, 0, 0,
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100, 100, width, height,
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format, 0, data);
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cogl_texture_set_region (priv->cogl_tex_id[1],
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100, 100, 100, 100,
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100, 100, width, height,
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format, 0, data);
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printf ("Subregion data updated.\n");
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}
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static void
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test_coglbox_class_init (TestCoglboxClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
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gobject_class->finalize = test_coglbox_finalize;
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gobject_class->dispose = test_coglbox_dispose;
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actor_class->paint = test_coglbox_paint;
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g_type_class_add_private (gobject_class, sizeof (TestCoglboxPrivate));
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}
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static ClutterActor*
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test_coglbox_new (void)
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{
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return g_object_new (TEST_TYPE_COGLBOX, NULL);
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}
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G_MODULE_EXPORT int
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test_cogl_tex_getset_main (int argc, char *argv[])
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{
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ClutterActor *stage;
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ClutterActor *coglbox;
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if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
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return 1;
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/* Stage */
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stage = clutter_stage_new ();
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clutter_actor_set_size (stage, 400, 400);
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clutter_stage_set_title (CLUTTER_STAGE (stage), "Cogl Texture Readback");
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g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
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/* Cogl Box */
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coglbox = test_coglbox_new ();
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), coglbox);
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clutter_actor_show_all (stage);
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clutter_main ();
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return 0;
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}
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G_MODULE_EXPORT const char *
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test_cogl_tex_getset_describe (void)
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{
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return "Texture region readback and update in Cogl.";
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}
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