void
ApplyProjection(const WindowProjection &projection, const GeoPoint &reference)
{
fixed angle = projection.GetScreenAngle().Degrees();
fixed scale = projection.GetScale();
const RasterPoint &screen_origin = projection.GetScreenOrigin();
const GeoPoint &screen_location = projection.GetGeoLocation();
const GeoPoint projection_delta = reference - screen_location;
const fixed scale_r = scale * FAISphere::REARTH;
const fixed scale_x = scale_r * screen_location.latitude.fastcosine();
const fixed scale_y = -scale_r;
#ifdef HAVE_GLES
#ifdef FIXED_MATH
GLfixed fixed_angle = angle.as_glfixed();
#else
GLfixed fixed_angle = angle * (1<<16);
#endif
glTranslatex((int)screen_origin.x << 16, (int)screen_origin.y << 16, 0);
glRotatex(fixed_angle, 0, 0, -(1<<16));
#else
glTranslatef(screen_origin.x, screen_origin.y, 0.);
glRotatef((GLfloat)angle, 0., 0., -1.);
#endif
glScalef(GLfloat(scale_x), GLfloat(scale_y), 1.);
glTranslatef(GLfloat(projection_delta.longitude.Native()),
GLfloat(projection_delta.latitude.Native()),
0.);
}
glm::mat4
ToGLM(const WindowProjection &projection, const GeoPoint &reference)
{
fixed angle = projection.GetScreenAngle().Degrees();
fixed scale = projection.GetScale();
const RasterPoint &screen_origin = projection.GetScreenOrigin();
const GeoPoint &screen_location = projection.GetGeoLocation();
const GeoPoint projection_delta = reference - screen_location;
const fixed scale_r = scale * FAISphere::REARTH;
const fixed scale_x = scale_r * screen_location.latitude.fastcosine();
const fixed scale_y = -scale_r;
const glm::vec3 scale_vec(GLfloat(scale_x), GLfloat(scale_y), 1);
glm::mat4 matrix = glm::scale(glm::rotate(glm::translate(glm::mat4(),
glm::vec3(screen_origin.x,
screen_origin.y,
0)),
GLfloat(angle),
glm::vec3(0, 0, -1)),
scale_vec);
matrix = glm::translate(matrix,
glm::vec3(GLfloat(projection_delta.longitude.Native()),
GLfloat(projection_delta.latitude.Native()),
0.));
return matrix;
}
void
TopographyFileRenderer::PaintLabels(Canvas &canvas,
const WindowProjection &projection,
LabelBlock &label_block)
{
if (file.IsEmpty())
return;
fixed map_scale = projection.GetMapScale();
if (!file.IsVisible(map_scale) || !file.IsLabelVisible(map_scale))
return;
UpdateVisibleShapes(projection);
if (visible_labels.empty())
return;
// TODO code: only draw inside screen!
// this will save time with rendering pixmaps especially
// we already do an outer visibility test, but may need a test
// in screen coords
canvas.Select(file.IsLabelImportant(map_scale) ?
Fonts::map_label_important : Fonts::map_label);
canvas.SetTextColor(Color(0x20, 0x20, 0x20));
canvas.SetBackgroundTransparent();
// get drawing info
int iskip = file.GetSkipSteps(map_scale);
#ifdef ENABLE_OPENGL
Matrix2D m1;
m1.Translate(projection.GetScreenOrigin());
m1.Rotate(projection.GetScreenAngle());
m1.Scale(projection.GetScale());
#endif
// Iterate over all shapes in the file
for (auto it = visible_labels.begin(), end = visible_labels.end();
it != end; ++it) {
const XShape &shape = **it;
if (!projection.GetScreenBounds().Overlaps(shape.get_bounds()))
continue;
// Skip shapes without a label
const TCHAR *label = shape.get_label();
if (label == NULL)
continue;
const unsigned short *lines = shape.get_lines();
const unsigned short *end_lines = lines + shape.get_number_of_lines();
#ifdef ENABLE_OPENGL
const ShapePoint *points = shape.get_points();
Matrix2D m2(m1);
m2.Translatex(shape.shape_translation(projection.GetGeoLocation()));
#else
const GeoPoint *points = shape.get_points();
#endif
for (; lines < end_lines; ++lines) {
int minx = canvas.get_width();
int miny = canvas.get_height();
#ifdef ENABLE_OPENGL
const ShapePoint *end = points + *lines;
#else
const GeoPoint *end = points + *lines;
#endif
for (; points < end; points += iskip) {
#ifdef ENABLE_OPENGL
RasterPoint pt = m2.Apply(*points);
#else
RasterPoint pt = projection.GeoToScreen(*points);
#endif
if (pt.x <= minx) {
minx = pt.x;
miny = pt.y;
}
}
points = end;
minx += 2;
miny += 2;
PixelSize tsize = canvas.CalcTextSize(label);
PixelRect brect;
brect.left = minx;
brect.right = brect.left + tsize.cx;
brect.top = miny;
brect.bottom = brect.top + tsize.cy;
if (!label_block.check(brect))
continue;
canvas.text(minx, miny, label);
}
}
}
void
TopographyFileRenderer::Paint(Canvas &canvas,
const WindowProjection &projection)
{
if (file.IsEmpty())
return;
fixed map_scale = projection.GetMapScale();
if (!file.IsVisible(map_scale))
return;
UpdateVisibleShapes(projection);
if (visible_shapes.empty())
return;
// TODO code: only draw inside screen!
// this will save time with rendering pixmaps especially
// we already do an outer visibility test, but may need a test
// in screen coords
#ifdef ENABLE_OPENGL
pen.Set();
brush.Set();
#else
shape_renderer.Configure(&pen, &brush);
#endif
// get drawing info
#ifdef ENABLE_OPENGL
const unsigned level = file.GetThinningLevel(map_scale);
const unsigned min_distance = file.GetMinimumPointDistance(level)
/ Layout::Scale(1);
#ifndef HAVE_GLES
float opengl_matrix[16];
glGetFloatv(GL_MODELVIEW_MATRIX, opengl_matrix);
#endif
glPushMatrix();
fixed angle = projection.GetScreenAngle().Degrees();
fixed scale = projection.GetScale();
const RasterPoint &screen_origin = projection.GetScreenOrigin();
#ifdef HAVE_GLES
#ifdef FIXED_MATH
GLfixed fixed_angle = angle.as_glfixed();
GLfixed fixed_scale = scale.as_glfixed_scale();
#else
GLfixed fixed_angle = angle * (1<<16);
GLfixed fixed_scale = scale * (1LL<<32);
#endif
glTranslatex((int)screen_origin.x << 16, (int)screen_origin.y << 16, 0);
glRotatex(fixed_angle, 0, 0, -(1<<16));
glScalex(fixed_scale, fixed_scale, 1<<16);
#else
glTranslatef(screen_origin.x, screen_origin.y, 0.);
glRotatef((GLfloat)angle, 0., 0., -1.);
glScalef((GLfloat)scale, (GLfloat)scale, 1.);
#endif
#else // !ENABLE_OPENGL
const GeoClip clip(projection.GetScreenBounds().Scale(fixed(1.1)));
AllocatedArray<GeoPoint> geo_points;
int iskip = file.GetSkipSteps(map_scale);
#endif
for (auto it = visible_shapes.begin(), end = visible_shapes.end();
it != end; ++it) {
const XShape &shape = **it;
if (!projection.GetScreenBounds().Overlaps(shape.get_bounds()))
continue;
#ifdef ENABLE_OPENGL
const ShapePoint *points = shape.get_points();
const ShapePoint translation =
shape.shape_translation(projection.GetGeoLocation());
glPushMatrix();
#ifdef HAVE_GLES
glTranslatex(translation.x, translation.y, 0);
#else
glTranslatef(translation.x, translation.y, 0.);
#endif
#else // !ENABLE_OPENGL
const unsigned short *lines = shape.get_lines();
const unsigned short *end_lines = lines + shape.get_number_of_lines();
const GeoPoint *points = shape.get_points();
#endif
switch (shape.get_type()) {
case MS_SHAPE_NULL:
break;
case MS_SHAPE_POINT:
#ifdef ENABLE_OPENGL
#ifdef HAVE_GLES
PaintPoint(canvas, projection, shape, NULL);
#else
PaintPoint(canvas, projection, shape, opengl_matrix);
#endif
#else // !ENABLE_OPENGL
PaintPoint(canvas, projection, lines, end_lines, points);
#endif
break;
case MS_SHAPE_LINE:
{
#ifdef ENABLE_OPENGL
#ifdef HAVE_GLES
glVertexPointer(2, GL_FIXED, 0, &points[0].x);
#else
glVertexPointer(2, GL_INT, 0, &points[0].x);
#endif
const GLushort *indices, *count;
if (level == 0 ||
(indices = shape.get_indices(level, min_distance, count)) == NULL) {
count = shape.get_lines();
const GLushort *end_count = count + shape.get_number_of_lines();
for (int offset = 0; count < end_count; offset += *count++)
glDrawArrays(GL_LINE_STRIP, offset, *count);
} else {
const GLushort *end_count = count + shape.get_number_of_lines();
for (; count < end_count; indices += *count++)
glDrawElements(GL_LINE_STRIP, *count, GL_UNSIGNED_SHORT, indices);
}
#else // !ENABLE_OPENGL
for (; lines < end_lines; ++lines) {
unsigned msize = *lines;
shape_renderer.Begin(msize);
const GeoPoint *end = points + msize - 1;
for (; points < end; ++points)
shape_renderer.AddPointIfDistant(projection.GeoToScreen(*points));
// make sure we always draw the last point
shape_renderer.AddPoint(projection.GeoToScreen(*points));
shape_renderer.FinishPolyline(canvas);
}
#endif
}
break;
case MS_SHAPE_POLYGON:
#ifdef ENABLE_OPENGL
{
const GLushort *index_count;
const GLushort *triangles = shape.get_indices(level, min_distance,
index_count);
#ifdef HAVE_GLES
glVertexPointer(2, GL_FIXED, 0, &points[0].x);
#else
glVertexPointer(2, GL_INT, 0, &points[0].x);
#endif
glDrawElements(GL_TRIANGLE_STRIP, *index_count, GL_UNSIGNED_SHORT,
triangles);
}
#else // !ENABLE_OPENGL
for (; lines < end_lines; ++lines) {
unsigned msize = *lines / iskip;
/* copy all polygon points into the geo_points array and clip
them, to avoid integer overflows (as RasterPoint may store
only 16 bit integers on some platforms) */
geo_points.GrowDiscard(msize * 3);
for (unsigned i = 0; i < msize; ++i)
geo_points[i] = points[i * iskip];
msize = clip.ClipPolygon(geo_points.begin(),
geo_points.begin(), msize);
if (msize < 3)
continue;
shape_renderer.Begin(msize);
for (unsigned i = 0; i < msize; ++i) {
GeoPoint g = geo_points[i];
shape_renderer.AddPointIfDistant(projection.GeoToScreen(g));
}
shape_renderer.FinishPolygon(canvas);
}
#endif
break;
}
#ifdef ENABLE_OPENGL
glPopMatrix();
#endif
}
#ifdef ENABLE_OPENGL
glPopMatrix();
#else
shape_renderer.Commit();
#endif
}