*/
#include <config.h>
-#include <GL/gl.h>
+#include <math.h>
+#include "gtkgl.h"
#include "grits-marker.h"
+/* Texture setup functions */
+static void render_point(GritsMarker *marker)
+{
+ /* Draw outline */
+ cairo_set_line_join(marker->cairo, CAIRO_LINE_JOIN_ROUND);
+ cairo_set_line_width(marker->cairo, marker->outline*2);
+ cairo_set_source_rgba(marker->cairo, 0, 0, 0, 1);
+
+ cairo_arc(marker->cairo, marker->xoff, marker->yoff, marker->radius,
+ 0, 2*G_PI);
+ cairo_stroke(marker->cairo);
+
+ /* Draw filler */
+ cairo_set_source_rgba(marker->cairo, 1, 1, 1, 1);
+
+ cairo_arc(marker->cairo, marker->xoff, marker->yoff, marker->radius,
+ 0, 2*G_PI);
+ cairo_fill(marker->cairo);
+}
+
+static void render_label(GritsMarker *marker)
+{
+ g_assert(marker->label);
+
+ /* Draw outline */
+ cairo_set_line_join(marker->cairo, CAIRO_LINE_JOIN_ROUND);
+ cairo_set_line_width(marker->cairo, marker->outline*2);
+ cairo_set_source_rgba(marker->cairo, 0, 0, 0, 1);
+ cairo_select_font_face(marker->cairo, "sans-serif",
+ CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
+ cairo_set_font_size(marker->cairo, 13);
+ cairo_move_to(marker->cairo, marker->xoff + (marker->icon_width / 2),
+ marker->yoff - (marker->icon_height / 2));
+ cairo_text_path(marker->cairo, marker->label);
+ cairo_stroke(marker->cairo);
+
+ /* Draw filler */
+ cairo_set_source_rgba(marker->cairo, 1, 1, 1, 1);
+ cairo_move_to(marker->cairo, marker->xoff + (marker->icon_width / 2),
+ marker->yoff - (marker->icon_height / 2));
+ cairo_show_text(marker->cairo, marker->label);
+}
+
+static void render_icon(GritsMarker *marker)
+{
+ g_assert(marker->icon_img != NULL);
+
+ /* move to marker location */
+ cairo_translate(marker->cairo, marker->xoff, marker->yoff);
+
+ /* center image */
+ cairo_translate(marker->cairo, -marker->icon_width/2,
+ -marker->icon_height/2);
+
+ cairo_set_source_surface(marker->cairo, marker->icon_img, 0, 0);
+
+ cairo_paint(marker->cairo);
+}
+
+static void render_all(GritsMarker *marker)
+{
+ g_assert(marker);
+ if (marker->display_mask & GRITS_MARKER_DMASK_ICON)
+ render_icon(marker);
+
+ if (marker->display_mask & GRITS_MARKER_DMASK_POINT)
+ render_point(marker);
+
+ if (marker->display_mask & GRITS_MARKER_DMASK_LABEL)
+ render_label(marker);
+
+ /* Load GL texture */
+ glEnable(GL_TEXTURE_2D);
+ glGenTextures(1, &marker->tex);
+ glBindTexture(GL_TEXTURE_2D, marker->tex);
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ glTexImage2D(GL_TEXTURE_2D, 0, 4, marker->width, marker->height,
+ 0, GL_BGRA, GL_UNSIGNED_BYTE,
+ cairo_image_surface_get_data(cairo_get_target(marker->cairo)));
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+}
+
+
+/* Constructors */
/**
* grits_marker_new:
* @label: a short description of the marker
*/
GritsMarker *grits_marker_new(const gchar *label)
{
+ GritsMarker *marker = g_object_new(GRITS_TYPE_MARKER, NULL);
+
+ GRITS_OBJECT(marker)->skip = GRITS_SKIP_CENTER;
+
+ marker->display_mask = GRITS_MARKER_DMASK_POINT |
+ GRITS_MARKER_DMASK_LABEL;
+
//g_debug("GritsMarker: new - %s", label);
- static const gdouble OUTLINE = 2;
- static const gdouble RADIUS = 3;
- static const gdouble WIDTH = 128;
- static const gdouble HEIGHT = 32;
+ /* specify size of point and size of surface */
+ marker->outline = 2;
+ marker->radius = 3;
+ marker->width = 128;
+ marker->height = 32;
+ marker->icon_width = marker->radius * 2;
+ marker->icon_height = marker->radius * 3;
+
+ marker->xoff = marker->radius+marker->outline;
+ marker->yoff = marker->height-(marker->radius+marker->outline);
+ marker->cairo = cairo_create(cairo_image_surface_create(
+ CAIRO_FORMAT_ARGB32, marker->width, marker->height));
+
+ marker->label = g_strdup(label);
+
+ return marker;
+}
+/**
+ * grits_marker_icon_new:
+ * @label: The label to display if GRITS_MARKER_DMASK_LABEL is set
+ * @filename: The filename of the icon
+ * @angle: The angle to rotate the icon (0 is north)
+ * @flip: Whether to flip the image so that it's never upside down.
+ * Useful for non-symmetric icons which have an "up".
+ * @display_mask: A bitmask which specifies which items to display.
+ *
+ * Create a new marker with a label, point, icon (png), or any
+ * combination of the above.
+ *
+ * Returns: the new #GritsMarker
+ */
+GritsMarker *grits_marker_icon_new(const gchar *label, const gchar *filename,
+ guint angle, gboolean flip, guint display_mask)
+{
GritsMarker *marker = g_object_new(GRITS_TYPE_MARKER, NULL);
- marker->xoff = RADIUS+OUTLINE;
- marker->yoff = HEIGHT-(RADIUS+OUTLINE);
+
marker->label = g_strdup(label);
- marker->cairo = cairo_create(cairo_image_surface_create(
- CAIRO_FORMAT_ARGB32, WIDTH, HEIGHT));
+ marker->angle = angle;
+ marker->flip = flip;
+ marker->display_mask = display_mask;
- cairo_select_font_face(marker->cairo, "sans-serif",
- CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
- cairo_set_font_size(marker->cairo, 13);
+ if (display_mask & GRITS_MARKER_DMASK_ICON) {
+ g_assert(filename != NULL);
+ g_debug("GritsMarker: marker_icon_new - marker image %s",
+ filename);
+ marker->icon_img = cairo_image_surface_create_from_png(filename);
+ if (cairo_surface_status(marker->icon_img)) {
+ g_warning("GritsMarker: marker_icon_new - "
+ "error reading file %s", filename);
+ /* convert it to a point, better than nothing */
+ marker->display_mask &= ~GRITS_MARKER_DMASK_ICON;
+ marker->display_mask |= GRITS_MARKER_DMASK_POINT;
+ marker->icon_width = 4;
+ marker->icon_height = 8;
- /* Draw outline */
- cairo_set_source_rgba(marker->cairo, 0, 0, 0, 1);
- cairo_set_line_width(marker->cairo, OUTLINE*2);
+ } else {
+ marker->icon_width =
+ cairo_image_surface_get_width(marker->icon_img);
+ marker->icon_height =
+ cairo_image_surface_get_height(marker->icon_img);
+ }
+ } else {
+ marker->icon_img = NULL;
+ marker->icon_width = 4; /* room for the point if there is one */
+ marker->icon_height = 8;
+ }
+ g_debug("GritsMarker: marker_icon_new - width = %d, height = %d",
+ marker->icon_width, marker->icon_height);
- cairo_arc(marker->cairo, marker->xoff, marker->yoff, RADIUS, 0, 2*G_PI);
- cairo_stroke(marker->cairo);
+ marker->outline = 2;
+ marker->radius = 3;
- cairo_move_to(marker->cairo, marker->xoff+4, marker->yoff-8);
- cairo_text_path(marker->cairo, marker->label);
- cairo_stroke(marker->cairo);
+ /* this is the surface size, a guess really */
+ marker->width = marker->icon_width + 128;
+ marker->height = marker->icon_height + 64;
- /* Draw filler */
- cairo_set_source_rgba(marker->cairo, 1, 1, 1, 1);
+ marker->xoff = marker->width/2;
+ marker->yoff = marker->height/2;
+ marker->cairo = cairo_create(cairo_image_surface_create(
+ CAIRO_FORMAT_ARGB32, marker->width, marker->height));
- cairo_arc(marker->cairo, marker->xoff, marker->yoff, RADIUS, 0, 2*G_PI);
- cairo_fill(marker->cairo);
+ /* clear the surface just in case */
+ cairo_set_operator(marker->cairo, CAIRO_OPERATOR_SOURCE);
+ //cairo_set_source_rgba(marker->cairo, 1.0, 0.0, 0.0, 0.3); // debug
+ cairo_set_source_rgba(marker->cairo, 1.0, 0.0, 0.0, 0.0);
+ cairo_paint(marker->cairo);
+ cairo_set_operator(marker->cairo, CAIRO_OPERATOR_OVER);
- cairo_move_to(marker->cairo, marker->xoff+4, marker->yoff-8);
- cairo_show_text(marker->cairo, marker->label);
+ render_all(marker);
- /* Load GL texture */
- glEnable(GL_TEXTURE_2D);
- glGenTextures(1, &marker->tex);
- glBindTexture(GL_TEXTURE_2D, marker->tex);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
- glTexImage2D(GL_TEXTURE_2D, 0, 4, WIDTH, HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE,
- cairo_image_surface_get_data(cairo_get_target(marker->cairo)));
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ if (marker->icon_img)
+ cairo_surface_destroy(marker->icon_img);
return marker;
}
+
/* Drawing */
static void grits_marker_draw(GritsObject *_marker, GritsOpenGL *opengl)
{
GritsMarker *marker = GRITS_MARKER(_marker);
GritsPoint *point = grits_object_center(marker);
- gdouble px, py, pz;
- grits_viewer_project(GRITS_VIEWER(opengl),
- point->lat, point->lon, point->elev,
- &px, &py, &pz);
-
- gint win_width = GTK_WIDGET(opengl)->allocation.width;
- gint win_height = GTK_WIDGET(opengl)->allocation.height;
- py = win_height - py;
- if (pz > 1)
- return;
-
- //g_debug("GritsOpenGL: draw_marker - %s pz=%f ", marker->label, pz);
cairo_surface_t *surface = cairo_get_target(marker->cairo);
gdouble width = cairo_image_surface_get_width(surface);
gdouble height = cairo_image_surface_get_height(surface);
- glMatrixMode(GL_PROJECTION); glLoadIdentity();
- glMatrixMode(GL_MODELVIEW); glLoadIdentity();
- glOrtho(0, win_width, win_height, 0, -1, 1);
- glTranslated(px - marker->xoff,
- py - marker->yoff, 0);
+ if (!marker->tex)
+ render_all(marker);
+
+ if (marker->ortho) {
+ gdouble px, py, pz;
+ grits_viewer_project(GRITS_VIEWER(opengl),
+ point->lat, point->lon, point->elev,
+ &px, &py, &pz);
+
+ if (pz > 1)
+ return;
+
+ GtkAllocation alloc;
+ gtk_widget_get_allocation(GTK_WIDGET(opengl), &alloc);
+ glTranslated(px, alloc.height-py, 0);
+ glRotatef(marker->angle, 0, 0, -1);
+ glTranslated(-marker->xoff, -marker->yoff, 0);
+ } else {
+ gdouble scale, eye[3], pos[3] =
+ {point->lat, point->lon, point->elev};
+ grits_viewer_get_location(GRITS_VIEWER(opengl),
+ &eye[0], &eye[1], &eye[2]);
+ lle2xyz(eye[0], eye[1], eye[2],
+ &eye[0], &eye[1], &eye[2]);
+ lle2xyz(pos[0], pos[1], pos[2],
+ &pos[0], &pos[1], &pos[2]);
+ scale = MPPX(distd(eye, pos));
+
+ glRotatef(marker->angle, 0, 0, -1);
+ glRotatef(180, 1, 0, 0);
+ glScalef(scale, scale, 1);
+ glTranslated(-marker->xoff, -marker->yoff, 0);
+ }
+
+ //g_debug("GritsOpenGL: draw_marker - %s pz=%f ", marker->label, pz);
glDisable(GL_LIGHTING);
glDisable(GL_COLOR_MATERIAL);
glBindTexture(GL_TEXTURE_2D, marker->tex);
glDisable(GL_CULL_FACE);
glBegin(GL_QUADS);
- glTexCoord2f(1, 0); glVertex3f(width, 0 , 0);
- glTexCoord2f(1, 1); glVertex3f(width, height, 0);
- glTexCoord2f(0, 1); glVertex3f(0 , height, 0);
- glTexCoord2f(0, 0); glVertex3f(0 , 0 , 0);
+ glTexCoord2f(1, 0); glVertex3f(width, 0 , 0); // 0 - 3 0
+ glTexCoord2f(1, 1); glVertex3f(width, height, 0); // 1 - | |
+ glTexCoord2f(0, 1); glVertex3f(0 , height, 0); // 2 - | |
+ glTexCoord2f(0, 0); glVertex3f(0 , 0 , 0); // 3 - 2----1
glEnd();
}
+
/* GObject code */
G_DEFINE_TYPE(GritsMarker, grits_marker, GRITS_TYPE_OBJECT);
static void grits_marker_init(GritsMarker *marker)
{
+ marker->ortho = TRUE;
}
static void grits_marker_finalize(GObject *_marker)
{
//g_debug("GritsMarker: finalize - %s", marker->label);
GritsMarker *marker = GRITS_MARKER(_marker);
- glDeleteTextures(1, &marker->tex);
- cairo_surface_t *surface = cairo_get_target(marker->cairo);
- cairo_surface_destroy(surface);
- cairo_destroy(marker->cairo);
+ if (marker->tex)
+ glDeleteTextures(1, &marker->tex);
+ if (marker->cairo) {
+ cairo_surface_t *surface = cairo_get_target(marker->cairo);
+ cairo_surface_destroy(surface);
+ cairo_destroy(marker->cairo);
+ }
g_free(marker->label);
- glDeleteTextures(1, &marker->tex);
}
static void grits_marker_class_init(GritsMarkerClass *klass)
projects / grits / blobdiff