* representing the OpenGL texture to use when drawing the tile.
*/
+#define GL_GLEXT_PROTOTYPES
#include <config.h>
#include <math.h>
+#include <string.h>
#include "gtkgl.h"
#include "grits-tile.h"
-guint grits_tile_mask = 0;
+static guint grits_tile_mask = 0;
gchar *grits_tile_path_table[2][2] = {
{"00.", "01."},
grits_bounds_set_bounds(&tile->coords, 0, 1, 1, 0);
grits_bounds_set_bounds(&tile->edge, n, s, e, w);
if (parent)
- tile->proj = parent->proj;
+ tile->proj = parent->proj;
return tile;
}
* (yet?) test if the tile would be drawn */
gdouble scale = eye->elev / min_dist;
view_res /= scale;
+ view_res *= 1.8;
//view_res /= 1.4; /* make it a little nicer, not sure why this is needed */
//g_message("tile=(%7.2f %7.2f %7.2f %7.2f) "
// "eye=(%9.1f %9.1f %9.1f) "
static void _grits_tile_split_latlon(GritsTile *tile)
{
+ //g_debug("GritsTile: split - %p", tile);
const gdouble rows = G_N_ELEMENTS(tile->children);
const gdouble cols = G_N_ELEMENTS(tile->children[0]);
const gdouble lat_dist = tile->edge.n - tile->edge.s;
const gdouble lon_step = lon_dist / cols;
int row, col;
- grits_tile_foreach_index(tile, row, col)
- tile->children[row][col] = grits_tile_new(tile,
- tile->edge.n - lat_step*(row+0), // north
- tile->edge.n - lat_step*(row+1), // south
- tile->edge.w + lon_step*(col+1), // east
- tile->edge.w + lon_step*(col+0)); // west
+ grits_tile_foreach_index(tile, row, col) {
+ if (!tile->children[row][col])
+ tile->children[row][col] =
+ grits_tile_new(tile, 0, 0, 0, 0);
+ /* Set edges aferwards so that north and south
+ * get reset for mercator projections */
+ GritsTile *child = tile->children[row][col];
+ child->edge.n = tile->edge.n - lat_step*(row+0);
+ child->edge.s = tile->edge.n - lat_step*(row+1);
+ child->edge.e = tile->edge.w + lon_step*(col+1);
+ child->edge.w = tile->edge.w + lon_step*(col+0);
+ }
}
static void _grits_tile_split_mercator(GritsTile *tile)
gdouble res, gint width, gint height,
GritsTileLoadFunc load_func, gpointer user_data)
{
- //g_debug("GritsTile: update - %p->atime = %u",
- // tile, (guint)tile->atime);
GritsTile *child;
if (tile == NULL)
return;
- if (!tile->data)
- load_func(tile, user_data);
-
- tile->atime = time(NULL);
+ //g_debug("GritsTile: update - %p->atime = %u",
+ // tile, (guint)tile->atime);
- /* Is this tile high enough resolution? */
- if (_grits_tile_precise(eye, &tile->edge, res, width, height)) {
- grits_tile_foreach(tile, child)
- if (child)
- GRITS_OBJECT(child)->hidden = TRUE;
+ /* Is the parent tile's texture high enough
+ * resolution for this part? */
+ gint xs = G_N_ELEMENTS(tile->children);
+ gint ys = G_N_ELEMENTS(tile->children[0]);
+ if (tile->parent && _grits_tile_precise(eye, &tile->edge,
+ res, width/xs, height/ys)) {
+ GRITS_OBJECT(tile)->hidden = TRUE;
return;
}
- /* Need more resolution, split tile and update recursively */
- if (!tile->children[0][0]) {
- switch (tile->proj) {
- case GRITS_PROJ_LATLON: _grits_tile_split_latlon(tile); break;
- case GRITS_PROJ_MERCATOR: _grits_tile_split_mercator(tile); break;
+ /* Load the tile */
+ if (!tile->load && !tile->data && !tile->tex && !tile->pixels && !tile->pixbuf)
+ load_func(tile, user_data);
+ tile->atime = time(NULL);
+ tile->load = TRUE;
+ GRITS_OBJECT(tile)->hidden = FALSE;
+
+ /* Split tile if needed */
+ grits_tile_foreach(tile, child) {
+ if (child == NULL) {
+ switch (tile->proj) {
+ case GRITS_PROJ_LATLON: _grits_tile_split_latlon(tile); break;
+ case GRITS_PROJ_MERCATOR: _grits_tile_split_mercator(tile); break;
+ }
}
}
- grits_tile_foreach(tile, child) {
- GRITS_OBJECT(child)->hidden = FALSE;
+ /* Update recursively */
+ grits_tile_foreach(tile, child)
grits_tile_update(child, eye, res, width, height,
load_func, user_data);
- }
+}
+
+/**
+ * grits_tile_load_pixels:
+ * @tile: the tile to load data into
+ * @pixels: buffered pixel data
+ * @width: width of the pixel buffer (in pixels)
+ * @height: height of the pixel buffer (in pixels)
+ * @alpha: TRUE if the pixel data contains an alpha channel
+ *
+ * Load tile data from an in memory pixel buffer.
+ *
+ * This function is thread safe and my be called from outside the main thread.
+ *
+ * Ownership of the pixel buffer is passed to the tile, it should not be freed
+ * or modified after calling this function.
+ *
+ * Returns: TRUE if the image was loaded successfully
+ */
+gboolean grits_tile_load_pixels(GritsTile *tile, guchar *pixels,
+ gint width, gint height, gint alpha)
+{
+ g_debug("GritsTile: load_pixels - %p -> %p (%dx%d:%d)",
+ tile, pixels, width, height, alpha);
+
+ /* Copy pixbuf data for callback */
+ tile->width = width;
+ tile->height = height;
+ tile->alpha = alpha;
+ tile->pixels = pixels;
+
+ /* Queue OpenGL texture load/draw */
+ grits_object_queue_draw(GRITS_OBJECT(tile));
+ return TRUE;
+}
+
+/**
+ * grits_tile_load_file:
+ * @tile: the tile to load data into
+ * @file: path to an image file to load
+ *
+ * Load tile data from a GdkPixbuf
+ * This function is thread safe and my be called from outside the main thread.
+ *
+ * Returns: TRUE if the image was loaded successfully
+ */
+gboolean grits_tile_load_pixbuf(GritsTile *tile, GdkPixbuf *pixbuf)
+{
+ g_debug("GritsTile: load_pixbuf %p -> %p", tile, pixbuf);
+
+ /* Copy pixbuf data for callback */
+ tile->pixbuf = g_object_ref(pixbuf);
+ tile->width = gdk_pixbuf_get_width(pixbuf);
+ tile->height = gdk_pixbuf_get_height(pixbuf);
+ tile->alpha = gdk_pixbuf_get_has_alpha(pixbuf);
+
+ /* Queue OpenGL texture load/draw */
+ grits_object_queue_draw(GRITS_OBJECT(tile));
+
+ return TRUE;
+}
+
+/**
+ * grits_tile_load_file:
+ * @tile: the tile to load data into
+ * @file: path to an image file to load
+ *
+ * Load tile data from an image file
+ * This function is thread safe and my be called from outside the main thread.
+ *
+ * Returns: TRUE if the image was loaded successfully
+ */
+gboolean grits_tile_load_file(GritsTile *tile, const gchar *file)
+{
+ g_debug("GritsTile: load_file %p -> %s", tile, file);
+ /* Copy pixbuf data for callback */
+ tile->pixbuf = gdk_pixbuf_new_from_file(file, NULL);
+ if (!tile->pixbuf)
+ return FALSE;
+ tile->width = gdk_pixbuf_get_width(tile->pixbuf);
+ tile->height = gdk_pixbuf_get_height(tile->pixbuf);
+ tile->alpha = gdk_pixbuf_get_has_alpha(tile->pixbuf);
+
+ /* Queue OpenGL texture load/draw */
+ grits_object_queue_draw(GRITS_OBJECT(tile));
+
+ return TRUE;
}
/**
*
* Locate the subtile with the highest resolution which contains the given
* lat/lon point.
- *
+ *
* Returns: the child tile
*/
GritsTile *grits_tile_find(GritsTile *root, gdouble lat, gdouble lon)
if (root->children[x][y])
has_children = TRUE;
}
- //g_debug("GritsTile: gc - %p->atime=%u < atime=%u",
- // root, (guint)root->atime, (guint)atime);
- if (!has_children && root->atime < atime && root->data) {
- free_func(root, user_data);
+ //g_debug("GritsTile: gc - %p kids=%d time=%d data=%d load=%d",
+ // root, !!has_children, root->atime < atime, !!root->data, !!root->load);
+ int thread_safe = !root->load || root->data || root->tex || root->pixels || root->pixbuf;
+ if (root->parent && !has_children && root->atime < atime && thread_safe) {
+ //g_debug("GritsTile: gc/free - %p", root);
+ if (root->pixbuf)
+ g_object_unref(root->pixbuf);
+ if (root->pixels)
+ g_free(root->pixels);
+ if (root->tex)
+ glDeleteTextures(1, &root->tex);
+ if (root->data) {
+ if (free_func)
+ free_func(root, user_data);
+ else
+ g_free(root->data);
+ }
g_object_unref(root);
return NULL;
}
/* Load texture mask so we can draw a texture to just a part of a triangle */
static guint _grits_tile_load_mask(void)
{
- guint tex;
- guint8 byte = 0xff;
+ guint tex;
+ const int width = 256, height = 256;
+ guint8 *bytes = g_malloc(width*height);
+ memset(bytes, 0xff, width*height);
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 1, 1, 0,
- GL_ALPHA, GL_UNSIGNED_BYTE, &byte);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0,
+ GL_ALPHA, GL_UNSIGNED_BYTE, bytes);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
+ g_free(bytes);
return tex;
}
+/* Load the texture from saved pixel data */
+static gboolean _grits_tile_load_tex(GritsTile *tile)
+{
+ /* Abort for null tiles */
+ if (!tile)
+ return FALSE;
+
+ /* Defer loading of hidden tiles */
+ if (GRITS_OBJECT(tile)->hidden)
+ return FALSE;
+
+ /* If we're already done loading the text stop */
+ if (tile->tex)
+ return TRUE;
+
+ /* Check if the tile has data yet */
+ if (!tile->pixels && !tile->pixbuf)
+ return FALSE;
+
+ /* Get correct pixel buffer */
+ guchar *pixels = tile->pixels ?:
+ gdk_pixbuf_get_pixels(tile->pixbuf);
+
+ /* Create texture */
+ g_debug("GritsTile: load_tex");
+ glGenTextures(1, &tile->tex);
+ glBindTexture(GL_TEXTURE_2D, tile->tex);
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ glTexImage2D(GL_TEXTURE_2D, 0, 4, tile->width, tile->height, 0,
+ (tile->alpha ? GL_RGBA : GL_RGB), GL_UNSIGNED_BYTE, pixels);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+ /* Free data */
+ if (tile->pixbuf) {
+ g_object_unref(tile->pixbuf);
+ tile->pixbuf = NULL;
+ }
+ if (tile->pixels) {
+ g_free(tile->pixels);
+ tile->pixels = NULL;
+ }
+
+ return TRUE;
+
+}
+
/* Draw a single tile */
static void grits_tile_draw_one(GritsTile *tile, GritsOpenGL *opengl, GList *triangles)
{
- if (!tile || !tile->data)
+ if (!tile || !tile->tex)
return;
if (!triangles)
g_warning("GritsOpenGL: _draw_tiles - No triangles to draw: edges=%f,%f,%f,%f",
tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
- if (!grits_tile_mask)
- grits_tile_mask = _grits_tile_load_mask();
//g_message("drawing %4d triangles for tile edges=%7.2f,%7.2f,%7.2f,%7.2f",
// g_list_length(triangles), tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
gdouble xscale = tile->coords.e - tile->coords.w;
gdouble yscale = tile->coords.s - tile->coords.n;
+ glPolygonOffset(0, -tile->zindex);
+
for (GList *cur = triangles; cur; cur = cur->next) {
RoamTriangle *tri = cur->data;
xy[i][1] = tile->coords.n + xy[i][1]*yscale;
}
- /* Polygon offset */
- glEnable(GL_POLYGON_OFFSET_FILL);
- glPolygonOffset(0, -tile->zindex);
-
- /* Setup texture */
- glActiveTexture(GL_TEXTURE0);
- glEnable(GL_TEXTURE_2D);
- glBindTexture(GL_TEXTURE_2D, *(guint*)tile->data);
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-
- /* Enable texture mask */
- if (tile->proj == GRITS_PROJ_MERCATOR) {
- glActiveTexture(GL_TEXTURE1);
- glEnable(GL_TEXTURE_2D);
- glBindTexture(GL_TEXTURE_2D, grits_tile_mask);
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-
- /* Hack to show maps tiles with better color */
- float material_emission[] = {0.5, 0.5, 0.5, 1.0};
- glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, material_emission);
-
- glEnable(GL_BLEND);
- }
-
/* Draw triangle */
+ glBindTexture(GL_TEXTURE_2D, tile->tex);
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBegin(GL_TRIANGLES);
glNormal3dv(tri->p.r->norm); glMultiTexCoord2dv(GL_TEXTURE0, xy[0]); glMultiTexCoord2dv(GL_TEXTURE1, xy[0]); glVertex3dv((double*)tri->p.r);
glNormal3dv(tri->p.m->norm); glMultiTexCoord2dv(GL_TEXTURE0, xy[1]); glMultiTexCoord2dv(GL_TEXTURE1, xy[1]); glVertex3dv((double*)tri->p.m);
glNormal3dv(tri->p.l->norm); glMultiTexCoord2dv(GL_TEXTURE0, xy[2]); glMultiTexCoord2dv(GL_TEXTURE1, xy[2]); glVertex3dv((double*)tri->p.l);
glEnd();
-
- /* Disable texture mask */
- glDisable(GL_TEXTURE_2D);
- glActiveTexture(GL_TEXTURE0);
}
}
/* Draw the tile */
static gboolean grits_tile_draw_rec(GritsTile *tile, GritsOpenGL *opengl)
{
- if (!tile || !tile->data || GRITS_OBJECT(tile)->hidden)
+ //g_debug("GritsTile: draw_rec - tile=%p, data=%d, load=%d, hide=%d", tile,
+ // tile ? !!tile->data : 0,
+ // tile ? !!tile->load : 0,
+ // tile ? !!GRITS_OBJECT(tile)->hidden : 0);
+
+ if (!_grits_tile_load_tex(tile))
return FALSE;
GritsTile *child = NULL;
- gboolean done = FALSE;
- while (!done) {
- /* Only draw children if possible */
- gboolean draw_parent = FALSE;
- grits_tile_foreach(tile, child)
- if (!child || !child->data || GRITS_OBJECT(child)->hidden)
- draw_parent = TRUE;
-
- /* Draw parent tile underneath */
- if (draw_parent) {
- GList *triangles = roam_sphere_get_intersect(opengl->sphere, FALSE,
- tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
- grits_tile_draw_one(tile, opengl, triangles);
- g_list_free(triangles);
- }
- /* Draw child tiles */
- gboolean drew_all_children = TRUE;
- grits_tile_foreach(tile, child)
- if (!grits_tile_draw_rec(child, opengl))
- drew_all_children = FALSE;
-
- /* Check if tiles were hidden by a thread while drawing */
- done = draw_parent || drew_all_children;
+ /* Draw child tiles */
+ gboolean draw_parent = FALSE;
+ grits_tile_foreach(tile, child)
+ if (!grits_tile_draw_rec(child, opengl))
+ draw_parent = TRUE;
+
+ /* Draw parent tile underneath using depth test */
+ if (draw_parent) {
+ GList *triangles = roam_sphere_get_intersect(opengl->sphere, FALSE,
+ tile->edge.n, tile->edge.s, tile->edge.e, tile->edge.w);
+ grits_tile_draw_one(tile, opengl, triangles);
+ g_list_free(triangles);
}
+
return TRUE;
}
glDepthFunc(GL_LESS);
glEnable(GL_ALPHA_TEST);
glAlphaFunc(GL_GREATER, 0.1);
+ glEnable(GL_POLYGON_OFFSET_FILL);
+ glEnable(GL_BLEND);
+
+ /* Setup texture mask */
+ if (!grits_tile_mask)
+ grits_tile_mask = _grits_tile_load_mask();
+ glActiveTexture(GL_TEXTURE1);
+ glEnable(GL_TEXTURE_2D);
+ glBindTexture(GL_TEXTURE_2D, grits_tile_mask);
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+ /* Setup texture */
+ glActiveTexture(GL_TEXTURE0);
+ glEnable(GL_TEXTURE_2D);
+
+ /* Hack to show maps tiles with better color */
+ if (GRITS_TILE(tile)->proj == GRITS_PROJ_MERCATOR) {
+ float material_emission[] = {0.5, 0.5, 0.5, 1.0};
+ glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, material_emission);
+ }
+
+ /* Draw all tiles */
grits_tile_draw_rec(GRITS_TILE(tile), opengl);
+
+ /* Disable texture mask */
+ glActiveTexture(GL_TEXTURE1);
+ glDisable(GL_TEXTURE_2D);
+ glActiveTexture(GL_TEXTURE0);
}
projects / grits / blobdiff