parent
70346d3c91
commit
f3b80af3e4
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@ -11,10 +11,13 @@ export col_news_title_text="#8899aa"
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export col_news_body="#ffffff"
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export col_news_body_text="#000000"
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export col_tile_border="#000000"
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export col_text_fixed="#445566"
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export page_width="480"
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export title="<font face=arial,helvetica,lucida size=4><b>"
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export _title="</b></font>"
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export para="<font face=arial,helvetica,lucida size=2><p>"
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export pre="<font face=courier,clean,fixed color=$col_text_fixed size=3><pre>"
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export _pre="</pre></font>"
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export cent="<center>"
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export _cent="</center>"
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export news_title="<table border=0 cellpadding=4 cellspacing=4><tr><td background=img/col_news_title.png align=left><font face=arial,helvetica,lucida size=2 color=$col_news_title_text><b>" export news_body="</b></font></p></td></tr><tr><td background=img/col_news_text.png><font face=arial,helvetica,lucida size=2 color=$col_news_body_text><p>"
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@ -7,14 +7,17 @@ export col_border="#000000"
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export col_pane="#667788"
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export col_content="#eeeeee"
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export col_news_title="#bbccdd"
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export col_news_title_text="#667788"
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export col_news_title_text="#8899aa"
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export col_news_body="#ffffff"
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export col_news_body_text="#000000"
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export col_tile_border="#000000"
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export col_text_fixed="#445566"
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export page_width="480"
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export title="<font face=arial,helvetica,lucida size=4><b>"
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export _title="</b></font>"
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export para="<font face=arial,helvetica,lucida size=2><p>"
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export pre="<font face=courier,clean,fixed color=$col_text_fixed size=2><pre>"
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export _pre="</pre></font>"
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export cent="<center>"
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export _cent="</center>"
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export news_title="<table border=0 cellpadding=4 cellspacing=4><tr><td background=img/col_news_title.png align=left><font face=arial,helvetica,lucida size=2 color=$col_news_title_text><b>" export news_body="</b></font></p></td></tr><tr><td background=img/col_news_text.png><font face=arial,helvetica,lucida size=2 color=$col_news_body_text><p>"
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@ -91,11 +91,11 @@ what size the object is to be and how to fill the image object with the
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image data, and Evas handles the rest. This makes dealing with images in
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Evas childs play. Here is a quick example of how it would work:
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@:para@
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<pre>
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@:pre@
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object = evas_add_image_from_file(evas, "flower.png");
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evas_move(evas, object, 10.0, 30.0);
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evas_show(evas, object);
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</pre>
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@:_pre@
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@:para@
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And it would look something like this:
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@:para@
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@ -105,10 +105,10 @@ By default image bojects are the size of the original image (in pixels). If
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we wish to make the object larger and have the image scale up or down in
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size we could do:
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@:para@
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<pre>
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@:pre@
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evas_resize(evas, object, 320.0, 240.0);
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evas_set_image_fill(evas, object, 0.0, 0.0, 320.0, 240.0);
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</pre>
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@:_pre@
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@:para@
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Now our canvas would look like this:
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@:para@
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@ -119,10 +119,10 @@ with this image we loaded, but we want it to tile (repeat) starting the tile
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at coordinate 0,0 relative to the to-left corner of the image object area,
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but have the tiled image size be 20x50.
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@:para@
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<pre>
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@:pre@
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evas_resize(evas, object, 300.0, 200.0);
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evas_set_image_fill(evas, object, 0.0, 0.0, 20.0, 50.0);
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</pre>
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@:_pre@
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@:para@
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Our result would be something like this:
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@:para@
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@ -167,12 +167,12 @@ reference in evas as "myfont", Evas will look in the directories (in the
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order given) for a "myfont.ttf" file. It is case sensitive, but this system
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proves to be nice and simple. Here is a simple example.
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@:para@
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<pre>
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@:pre@
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object = evas_add_text(evas, "notepad", 18, "Here is a line of text!");
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evas_move(evas, object, 120.0, 50.0);
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evas_set_color(evas, object, 0, 0, 0, 255);
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evas_show(evas, object);
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</pre>
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@:_pre@
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@:para@
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This should create a text object with its top-left starting at 120.0, 50.0
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in the Evas, with the notepad font at size 18, with the text "Here is a line
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@ -184,11 +184,11 @@ This is what it would look like:
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As you can see - it is really easy to create some text in an Evas canvas,
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and it is just as easy to change its contents with calls such as the following
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@:para@
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<pre>
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@:pre@
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evas_set_text(evas, object, "Some new text here");
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evas_set_font(evas, object, "arial", 30);
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evas_set_color(evas, object, 255, 0, 0, 255);
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</pre>
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@:_pre@
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@:para@
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Just modifying the properties of an object this way directly leads to it
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changing as you would expect. There are enough text query calls too to
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@ -215,7 +215,7 @@ lighting and shadow effects and many other things.
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Creating and managing these objects, like almost everything else, is also
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childs play. take a look at this:
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@:para@
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<pre>
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@:pre@
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object = evas_add_gradient_box(evas);
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evas_move(evas, object, 150.0, 100.0);
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evas_resize(evas, object, 200.0, 120.0);
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@ -229,7 +229,7 @@ evas_set_gradient(evas, object, gradient);
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evas_gradient_free(gradient);
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evas_set_angle(evas, object, 290.0);
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evas_show(evas, object);
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</pre>
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@:_pre@
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@:para@
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The program we are developing looks now something like this:
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@:para@
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@ -269,6 +269,53 @@ use these to fill in backgrounds, simulate circles (with polygons) and much
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more. They are versatile and simple and let you do basic drawing withotu
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requiring on-disk data to generate it from.
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@:para@
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@:pre@
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object = evas_add_rectangle(evas);
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evas_move(evas, object, 20.0, 130.0);
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evas_resize(evas, object, 50.0, 70.0);
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evas_set_color(evas, object, 20.0, 50.0, 100.0, 130.0);
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evas_show(evas, object);
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@:_pre@
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@:para@
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Here we add a simple rectangle thats blue-ish and partially transparent.
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It's easy to add - no problems. It may seem a fair bit of setup code, but
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now we can just move, resize, show hide etc. the object whenever we want a
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change - evas does all the rest for us - including layering, obscuring,
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figuring how to re-render it and optimizing the rendering to only render
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what changed and much much much more.
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@:para@
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@:pre@
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object = evas_add_poly(evas);
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evas_add_point(evas, object, 0.0, 0.0);
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evas_add_point(evas, object, 150.0, 80.0);
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evas_add_point(evas, object, 210.0, 150.0);
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evas_add_point(evas, object, 80.0, 110.0);
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evas_add_point(evas, object, 20.0, 30.0);
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evas_set_color(evas, object, 200.0, 40.0, 0.0, 130.0);
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evas_move(evas, object, 20.0, 220.0);
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evas_show(evas, object);
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@:_pre@
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@:para@
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A polygon, reddish/orange, parially transparent with 5 points. We create the
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polygon relative to the top left of its bounding box then just move it where
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we want it later - this makes it easy to just move polygons around withotu
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having to reset their coordinates. Just like with polygons - Evas handles
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optimizing all the other stuff surrounding these objects for us.
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@:para@
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@:pre@
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object = evas_add_line(evas);
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evas_set_line_xy(evas, object, 220.0, 240.0, 390.0, 380.0);
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evas_set_color(evas, object, 30.0, 80.0, 80.0, 200.0);
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evas_show(evas, object);
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@:_pre@
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@:para@
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And a line. Anti-aliased. Simple. Just Chnage its color and coordinates when
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you want. Evas does the rest.
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@:para@
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And now with these primitives added out Evas canvas will look like this:
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@:para@
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<a href=evas_primitives_eg_0.html><img src=img/evas_primitives_eg_0_thumb.png width=80 height=80 border=1></a>
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@:para@
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@tile_area_end@
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@end@
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@ -0,0 +1,6 @@
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@top@
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@start@
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@:para@
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<a href=evas.html><img src=img/evas_primitives_eg_0.png width=400 height=400 border=1></a>
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@end@
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@bottom@
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@ -196,11 +196,11 @@ what size the object is to be and how to fill the image object with the
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image data, and Evas handles the rest. This makes dealing with images in
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Evas childs play. Here is a quick example of how it would work:
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<font face=arial,helvetica,lucida size=2><p>
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<pre>
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<font face=courier,clean,fixed color=#445566 size=3><pre>
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object = evas_add_image_from_file(evas, "flower.png");
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evas_move(evas, object, 10.0, 30.0);
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evas_show(evas, object);
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</pre>
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</pre></font>
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<font face=arial,helvetica,lucida size=2><p>
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And it would look something like this:
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<font face=arial,helvetica,lucida size=2><p>
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@ -210,10 +210,10 @@ By default image bojects are the size of the original image (in pixels). If
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we wish to make the object larger and have the image scale up or down in
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size we could do:
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<font face=arial,helvetica,lucida size=2><p>
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<pre>
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<font face=courier,clean,fixed color=#445566 size=3><pre>
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evas_resize(evas, object, 320.0, 240.0);
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evas_set_image_fill(evas, object, 0.0, 0.0, 320.0, 240.0);
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</pre>
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</pre></font>
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<font face=arial,helvetica,lucida size=2><p>
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Now our canvas would look like this:
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<font face=arial,helvetica,lucida size=2><p>
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@ -224,10 +224,10 @@ with this image we loaded, but we want it to tile (repeat) starting the tile
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at coordinate 0,0 relative to the to-left corner of the image object area,
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but have the tiled image size be 20x50.
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<font face=arial,helvetica,lucida size=2><p>
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<pre>
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<font face=courier,clean,fixed color=#445566 size=3><pre>
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evas_resize(evas, object, 300.0, 200.0);
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evas_set_image_fill(evas, object, 0.0, 0.0, 20.0, 50.0);
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</pre>
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</pre></font>
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<font face=arial,helvetica,lucida size=2><p>
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Our result would be something like this:
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<font face=arial,helvetica,lucida size=2><p>
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@ -298,12 +298,12 @@ reference in evas as "myfont", Evas will look in the directories (in the
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order given) for a "myfont.ttf" file. It is case sensitive, but this system
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proves to be nice and simple. Here is a simple example.
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<font face=arial,helvetica,lucida size=2><p>
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<pre>
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<font face=courier,clean,fixed color=#445566 size=3><pre>
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object = evas_add_text(evas, "notepad", 18, "Here is a line of text!");
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evas_move(evas, object, 120.0, 50.0);
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evas_set_color(evas, object, 0, 0, 0, 255);
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evas_show(evas, object);
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</pre>
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</pre></font>
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<font face=arial,helvetica,lucida size=2><p>
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This should create a text object with its top-left starting at 120.0, 50.0
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in the Evas, with the notepad font at size 18, with the text "Here is a line
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@ -315,11 +315,11 @@ This is what it would look like:
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As you can see - it is really easy to create some text in an Evas canvas,
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and it is just as easy to change its contents with calls such as the following
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<font face=arial,helvetica,lucida size=2><p>
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<pre>
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<font face=courier,clean,fixed color=#445566 size=3><pre>
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evas_set_text(evas, object, "Some new text here");
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evas_set_font(evas, object, "arial", 30);
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evas_set_color(evas, object, 255, 0, 0, 255);
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</pre>
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</pre></font>
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<font face=arial,helvetica,lucida size=2><p>
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Just modifying the properties of an object this way directly leads to it
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changing as you would expect. There are enough text query calls too to
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@ -372,7 +372,7 @@ lighting and shadow effects and many other things.
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Creating and managing these objects, like almost everything else, is also
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childs play. take a look at this:
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<font face=arial,helvetica,lucida size=2><p>
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<pre>
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<font face=courier,clean,fixed color=#445566 size=3><pre>
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object = evas_add_gradient_box(evas);
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evas_move(evas, object, 150.0, 100.0);
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evas_resize(evas, object, 200.0, 120.0);
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@ -386,7 +386,7 @@ evas_set_gradient(evas, object, gradient);
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evas_gradient_free(gradient);
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evas_set_angle(evas, object, 290.0);
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evas_show(evas, object);
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</pre>
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</pre></font>
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<font face=arial,helvetica,lucida size=2><p>
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The program we are developing looks now something like this:
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<font face=arial,helvetica,lucida size=2><p>
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|
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@ -452,6 +452,53 @@ use these to fill in backgrounds, simulate circles (with polygons) and much
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more. They are versatile and simple and let you do basic drawing withotu
|
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requiring on-disk data to generate it from.
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<font face=arial,helvetica,lucida size=2><p>
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<font face=courier,clean,fixed color=#445566 size=3><pre>
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object = evas_add_rectangle(evas);
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evas_move(evas, object, 20.0, 130.0);
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evas_resize(evas, object, 50.0, 70.0);
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evas_set_color(evas, object, 20.0, 50.0, 100.0, 130.0);
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evas_show(evas, object);
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</pre></font>
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<font face=arial,helvetica,lucida size=2><p>
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Here we add a simple rectangle thats blue-ish and partially transparent.
|
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It's easy to add - no problems. It may seem a fair bit of setup code, but
|
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now we can just move, resize, show hide etc. the object whenever we want a
|
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change - evas does all the rest for us - including layering, obscuring,
|
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figuring how to re-render it and optimizing the rendering to only render
|
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what changed and much much much more.
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<font face=arial,helvetica,lucida size=2><p>
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<font face=courier,clean,fixed color=#445566 size=3><pre>
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object = evas_add_poly(evas);
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evas_add_point(evas, object, 0.0, 0.0);
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evas_add_point(evas, object, 150.0, 80.0);
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evas_add_point(evas, object, 210.0, 150.0);
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evas_add_point(evas, object, 80.0, 110.0);
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evas_add_point(evas, object, 20.0, 30.0);
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evas_set_color(evas, object, 200.0, 40.0, 0.0, 130.0);
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evas_move(evas, object, 20.0, 220.0);
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evas_show(evas, object);
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</pre></font>
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<font face=arial,helvetica,lucida size=2><p>
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A polygon, reddish/orange, parially transparent with 5 points. We create the
|
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polygon relative to the top left of its bounding box then just move it where
|
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we want it later - this makes it easy to just move polygons around withotu
|
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having to reset their coordinates. Just like with polygons - Evas handles
|
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optimizing all the other stuff surrounding these objects for us.
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<font face=arial,helvetica,lucida size=2><p>
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<font face=courier,clean,fixed color=#445566 size=3><pre>
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object = evas_add_line(evas);
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evas_set_line_xy(evas, object, 220.0, 240.0, 390.0, 380.0);
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evas_set_color(evas, object, 30.0, 80.0, 80.0, 200.0);
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evas_show(evas, object);
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</pre></font>
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<font face=arial,helvetica,lucida size=2><p>
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And a line. Anti-aliased. Simple. Just Chnage its color and coordinates when
|
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you want. Evas does the rest.
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<font face=arial,helvetica,lucida size=2><p>
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And now with these primitives added out Evas canvas will look like this:
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<font face=arial,helvetica,lucida size=2><p>
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<a href=evas_primitives_eg_0.html><img src=img/evas_primitives_eg_0_thumb.png width=80 height=80 border=1></a>
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<font face=arial,helvetica,lucida size=2><p>
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</td></tr></table></td>
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</tr><tr>
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<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
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@ -0,0 +1,86 @@
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<html><head><title>W W W . E N L I G H T E N M E N T . O R G</title></head>
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<body bgcolor=#cccccc
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text=#000000
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link=#445566
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vlink=#99aabb
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alink=#ff0000
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topmargin=20
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leftmargin=20
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marginwidth=20
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marginheight=20>
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<center>
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<table border=0 cellpadding=0 cellspacing=0>
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<tr>
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<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
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<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
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<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
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<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
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<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
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</tr>
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<tr>
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<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 background=img/col_pane.png><table border=0 cellpadding=8 cellspacing=0><tr><td><img src=img/logo_tl.png width=80 height=100></td></tr></table></td>
|
||||
<td width=1 height=1 background=img/col_pane.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 background=img/col_pane.png><table border=0 cellpadding=8 cellspacing=0><tr>
|
||||
<td><a href=main.html><img src=img/title.png width=480 height=100 border=0 alt=Enlightnement></a></td>
|
||||
</tr></table>
|
||||
</td>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 background=img/col_pane.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 background=img/col_pane.png valign=top><table border=0 cellpadding=8 cellspacing=0><tr>
|
||||
<td><a href=main.html><img src=img/nav_main.png width=80 height=15 border=0></a><br><br>
|
||||
<a href=news.html><img src=img/nav_news.png width=80 height=15 border=0></a><br><br>
|
||||
<a href=download.html><img src=img/nav_download.png width=80 height=15 border=0></a><br><br>
|
||||
<a href=shots.html><img src=img/nav_shots.png width=80 height=15 border=0></a><br><br>
|
||||
<a href=team.html><img src=img/nav_team.png width=80 height=15 border=0></a><br><br>
|
||||
<a href=info.html><img src=img/nav_info.png width=80 height=15 border=0></a><br><br>
|
||||
<a href=source.html><img src=img/nav_source.png width=80 height=15 border=0></a><br><br>
|
||||
<a href=mail.html><img src=img/nav_mail.png width=80 height=15 border=0></a><br><br>
|
||||
<a href=goodies.html><img src=img/nav_goodies.png width=80 height=15 border=0></a></td>
|
||||
</tr></table>
|
||||
</td>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=480 height=1 background=img/col_content.png valign=top align=left>
|
||||
<table border=0 cellpadding=0 cellspacing=0><tr>
|
||||
<td><img src=img/shadow_tl.png width=20 height=20></td>
|
||||
<td background=img/shadow_t.png><img src=img/blank.gif width=480 height=20></td>
|
||||
<td><img src=img/shadow_t.png width=20 height=20></td>
|
||||
</tr><tr>
|
||||
<td background=img/shadow_l.png><img src=img/blank.gif width=20 height=300></td>
|
||||
<td valign=top align=left>
|
||||
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<a href=evas.html><img src=img/evas_primitives_eg_0.png width=400 height=400 border=1></a>
|
||||
</td>
|
||||
<td><img src=img/blank.gif width=20 height=20></td>
|
||||
</tr><tr>
|
||||
<td><img src=img/shadow_l.png width=20 height=20></td>
|
||||
<td><img src=img/blank.gif width=480 height=20></td>
|
||||
<td><img src=img/blank.gif width=20 height=20></td>
|
||||
</tr></table>
|
||||
</td>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
<td width=1 height=1 bgcolor=#000000><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr>
|
||||
</table>
|
||||
</center>
|
||||
|
||||
</body></html>
|
||||
|
||||
|
|
@ -0,0 +1,402 @@
|
|||
<html>
|
||||
<center><img src=img/evas_logo.png width=128 height=128></center>
|
||||
<center><font face=arial,helvetica,lucida size=4><b>Evas</b></font></center>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Evas is a hardware-accelerated canvas API for X-Windows that can draw
|
||||
anti-aliased text, smooth super and sub-sampled images, alpha-blend, as well
|
||||
as drop down to using normal X11 primitives such as pixmaps, lines and
|
||||
rectangles for speed if your CPU or graphics hardware are too slow.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Evas abstracts any need to know much abotu what the characteristics of your
|
||||
XServer's display are - what depth or what magic visuals etc, it has. The
|
||||
most you need to tell evas is how many colors (at a maximum) to use if the
|
||||
display is not a turecolor display. By default it is suggested to use 216
|
||||
colors (as this equates to a 6x6x6 colorcube - exactly the same colorcube
|
||||
netscape, mozilla, gdkrgb etc. use so colors will be shared). If evas can't
|
||||
allocate enough colors it keeps reducing the size of the colorcube until it
|
||||
reaches plain black and white. This way it can display on anything from a
|
||||
black and white only terminal to 16 color VGA to 256 color and all the way
|
||||
up through 15, 16 24 and 32bit color. Here are some screenshots of a demo
|
||||
evas app to show the rendering output in different situations
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<table border=0 cellpadding=0 cellspacing=0><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/tile_shadow_tl.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/tile_shadow_t.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/tile_shadow_l.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/tile.png align=left valign=top>
|
||||
|
||||
<img src=img/evas_colors.png width=128 height=128>
|
||||
<br><img src=img/blank.gif width=144 height=16></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td valign=top align=left><table border=0 cellpadding=8 cellspacing=0><tr><td>
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<center><font face=arial,helvetica,lucida size=4><b>Colors</b></font></center>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
The following screenshots of a demo Evas application were taken in 8 bit
|
||||
color (256 colors) (with worse color situations down to monochrome
|
||||
simulated) using the software rendering engine in Evas.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<a href=evas_depth_eg_8_216.html><img src=img/evas_depth_eg_8_216_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8_128.html><img src=img/evas_depth_eg_8_128_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8_64.html><img src=img/evas_depth_eg_8_64_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8_32.html><img src=img/evas_depth_eg_8_32_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8_16.html><img src=img/evas_depth_eg_8_16_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8_8.html><img src=img/evas_depth_eg_8_8_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8_2.html><img src=img/evas_depth_eg_8_2_thumb.png width=80 height=80 border=1></a>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
The next pictures were taken of the same application in 8 bit color
|
||||
simulating worse color depths by reducing the allocation max, and using the
|
||||
X11 rendering engine that uses X11 primitives instead of the CPU (ie
|
||||
pixmaps, lines, rectangles, masks etc.).
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<a href=evas_depth_eg_8x_216.html><img src=img/evas_depth_eg_8x_216_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8x_128.html><img src=img/evas_depth_eg_8x_128_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8x_64.html><img src=img/evas_depth_eg_8x_64_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8x_32.html><img src=img/evas_depth_eg_8x_32_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8x_16.html><img src=img/evas_depth_eg_8x_16_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8x_8.html><img src=img/evas_depth_eg_8x_8_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_8x_2.html><img src=img/evas_depth_eg_8x_2_thumb.png width=80 height=80 border=1></a>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
The following screenshots are of the same Evas demo application in 16 bit
|
||||
color, with the shots being software, OpenGL and X11 rendering engines
|
||||
respectively.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<a href=evas_depth_eg_16.html><img src=img/evas_depth_eg_16_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_16gl.html><img src=img/evas_depth_eg_16gl_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_16x.html><img src=img/evas_depth_eg_16x_thumb.png width=80 height=80 border=1></a>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
The following screenshots are of the same Evas demo application in 24/32 bit
|
||||
color, with the shots being software, OpenGL and X11 rendering engines
|
||||
respectively.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<a href=evas_depth_eg_32.html><img src=img/evas_depth_eg_32_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_32gl.html><img src=img/evas_depth_eg_32gl_thumb.png width=80 height=80 border=1></a>
|
||||
<a href=evas_depth_eg_32x.html><img src=img/evas_depth_eg_32x_thumb.png width=80 height=80 border=1></a>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
</td></tr></table></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td></tr></table>
|
||||
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Evas provides a structured mode graphics API and thus provides a set of
|
||||
objects as primities to work with. As opposed to immediate mode where the
|
||||
program actually draws the data, with structured mode the program describes
|
||||
the data with primitives and lest the canvas handle the drawing. This means
|
||||
the program has to describe what it wants to draw in terms of the primitives
|
||||
given. Here is a list of them.
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<table border=0 cellpadding=0 cellspacing=0><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/tile_shadow_tl.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/tile_shadow_t.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/tile_shadow_l.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/tile.png align=left valign=top>
|
||||
|
||||
<img src=img/evas_canvas.png width=128 height=128>
|
||||
<br><img src=img/blank.gif width=144 height=16></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td valign=top align=left><table border=0 cellpadding=8 cellspacing=0><tr><td>
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<center><font face=arial,helvetica,lucida size=4><b>Images</b></font></center>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
One of the most versatile and appealing objects is the image object. You
|
||||
simple tell Evas where the image file is located, where to put the image
|
||||
what size the object is to be and how to fill the image object with the
|
||||
image data, and Evas handles the rest. This makes dealing with images in
|
||||
Evas childs play. Here is a quick example of how it would work:
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<pre>
|
||||
object = evas_add_image_from_file(evas, "flower.png");
|
||||
evas_move(evas, object, 10.0, 30.0);
|
||||
evas_show(evas, object);
|
||||
</pre>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
And it would look something like this:
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<a href=evas_image_eg_0.html><img src=img/evas_image_eg_0_thumb.png width=80 height=80 border=1></a>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
By default image bojects are the size of the original image (in pixels). If
|
||||
we wish to make the object larger and have the image scale up or down in
|
||||
size we could do:
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<pre>
|
||||
evas_resize(evas, object, 320.0, 240.0);
|
||||
evas_set_image_fill(evas, object, 0.0, 0.0, 320.0, 240.0);
|
||||
</pre>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Now our canvas would look like this:
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<a href=evas_image_eg_1.html><img src=img/evas_image_eg_1_thumb.png width=80 height=80 border=1></a>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Easy, isn't it? now lets say we want to have a 300x200 unit rectangle filled
|
||||
with this image we loaded, but we want it to tile (repeat) starting the tile
|
||||
at coordinate 0,0 relative to the to-left corner of the image object area,
|
||||
but have the tiled image size be 20x50.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<pre>
|
||||
evas_resize(evas, object, 300.0, 200.0);
|
||||
evas_set_image_fill(evas, object, 0.0, 0.0, 20.0, 50.0);
|
||||
</pre>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Our result would be something like this:
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<a href=evas_image_eg_2.html><img src=img/evas_image_eg_2_thumb.png width=80 height=80 border=1></a>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
You may think "I can do this just as easily with normal X drawing primitievas
|
||||
and a little extra sugar thrown in" but Evas does a whole lot more for you.
|
||||
You never need to know how to render the objects or handle re-rendering
|
||||
them. Evas does this and optimizes it for you. it handles layering and
|
||||
resizing, it optimizes everything to minimize CPU effort with a dynamic set of
|
||||
objects. It handles the work to the point where ALL you need to do is
|
||||
create, destory, show, hide, move, resize etc. objects and Evas does the
|
||||
rest of the nasty work for you.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
As you can see - the program has to know and do very little. There are many
|
||||
powerful things you can do, like fade images in and out, re-color them so
|
||||
they look tinted, have them rendered only within a certain area of the
|
||||
canvas and more.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
</td></tr></table></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td></tr></table>
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Text is a very important part of many applications. Evas of course provides
|
||||
a nice simple way of getting text into the Evas you have up without much
|
||||
fuss or bother AND to boot it will anti-alias it so your edges are smooth
|
||||
and not jagged AND allow fo the text to be semi-transparent and much more.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<table border=0 cellpadding=0 cellspacing=0><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/tile_shadow_tl.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/tile_shadow_t.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/tile_shadow_l.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/tile.png align=left valign=top>
|
||||
|
||||
<img src=img/evas_text.png width=128 height=128>
|
||||
<br><img src=img/blank.gif width=144 height=16></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td valign=top align=left><table border=0 cellpadding=8 cellspacing=0><tr><td>
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<center><font face=arial,helvetica,lucida size=4><b>Text</b></font></center>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Text allows you to display information in your Evas without needing image
|
||||
objects with pre-rendered text. But first you have to realise fonts are
|
||||
handled a little differently. First there is a font path - this is a list of
|
||||
directories where to find font files. Evas supports Truetype fonts only -
|
||||
some may think this bad, but there are more turetype fonts than any other
|
||||
format out there and many are very good quality.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Evas looks at the fonts in a directory by their filename, so a font you
|
||||
reference in evas as "myfont", Evas will look in the directories (in the
|
||||
order given) for a "myfont.ttf" file. It is case sensitive, but this system
|
||||
proves to be nice and simple. Here is a simple example.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<pre>
|
||||
object = evas_add_text(evas, "notepad", 18, "Here is a line of text!");
|
||||
evas_move(evas, object, 120.0, 50.0);
|
||||
evas_set_color(evas, object, 0, 0, 0, 255);
|
||||
evas_show(evas, object);
|
||||
</pre>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
This should create a text object with its top-left starting at 120.0, 50.0
|
||||
in the Evas, with the notepad font at size 18, with the text "Here is a line
|
||||
of text!" and in solid black (Red = 0, Green = 0, Blue = 0, Alpha = 255).
|
||||
This is what it would look like:
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<a href=evas_text_eg_0.html><img src=img/evas_text_eg_0_thumb.png width=80 height=80 border=1></a>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
As you can see - it is really easy to create some text in an Evas canvas,
|
||||
and it is just as easy to change its contents with calls such as the following
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<pre>
|
||||
evas_set_text(evas, object, "Some new text here");
|
||||
evas_set_font(evas, object, "arial", 30);
|
||||
evas_set_color(evas, object, 255, 0, 0, 255);
|
||||
</pre>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Just modifying the properties of an object this way directly leads to it
|
||||
changing as you would expect. There are enough text query calls too to
|
||||
impliment almost anything you need using text objects, including text entry
|
||||
boxes, word processors, html and text formatting engines and much much more.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
</td></tr></table></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td></tr></table>
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Another useful primitive that can be used is the Gradient Box primitive.
|
||||
Basically this is a rectangular object that is filled with a linear range of
|
||||
colors at an arbitary angle defined as part of the properties of that object.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<table border=0 cellpadding=0 cellspacing=0><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/tile_shadow_tl.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/tile_shadow_t.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/tile_shadow_l.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/tile.png align=left valign=top>
|
||||
|
||||
<img src=img/evas_gradient.png width=128 height=128>
|
||||
<br><img src=img/blank.gif width=144 height=16></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td valign=top align=left><table border=0 cellpadding=8 cellspacing=0><tr><td>
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<center><font face=arial,helvetica,lucida size=4><b>Gradients</b></font></center>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Gradients are useful for when you want to fille a bakcgroudn or rectangle
|
||||
with something other than a solid color, but do not want to go to the
|
||||
expense of needing an image for it. They can be used to hilight areas with
|
||||
lighting and shadow effects and many other things.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
Creating and managing these objects, like almost everything else, is also
|
||||
childs play. take a look at this:
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<pre>
|
||||
object = evas_add_gradient_box(evas);
|
||||
evas_move(evas, object, 150.0, 100.0);
|
||||
evas_resize(evas, object, 200.0, 120.0);
|
||||
gradient = evas_gradient_new();
|
||||
evas_gradient_add_color(gradient, 255, 255, 255, 255, 10);
|
||||
evas_gradient_add_color(gradient, 255, 255, 0, 255, 10);
|
||||
evas_gradient_add_color(gradient, 255, 0, 0, 255, 10);
|
||||
evas_gradient_add_color(gradient, 0, 0, 128, 255, 10);
|
||||
evas_gradient_add_color(gradient, 0, 0, 128, 0, 10);
|
||||
evas_set_gradient(evas, object, gradient);
|
||||
evas_gradient_free(gradient);
|
||||
evas_set_angle(evas, object, 290.0);
|
||||
evas_show(evas, object);
|
||||
</pre>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
The program we are developing looks now something like this:
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<a href=evas_grad_eg_0.html><img src=img/evas_grad_eg_0_thumb.png width=80 height=80 border=1></a>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
As you see, you create the gradient box object, place it somewhere in your
|
||||
Evas, set its size, and now you get to define the list of colors it is to
|
||||
use (from start of the gradient to end) and their relative "distance" apart.
|
||||
This is relative to the length of the gradient, not an absolute, so the
|
||||
total length is the sum of all the distances (except the first element in
|
||||
the gradient whose distance is ignored). We add in white, yellow, red, dark
|
||||
blue then "transparent" in the gradient in order, then set this gradient to
|
||||
be used by this gradient box. once we are done setting up this gradient we
|
||||
can set it to be used by more than one gradient box, and when done with it
|
||||
finally, we can just free it. All we do now is determine the angle the
|
||||
gradient is at in the box (with 0 degrees being the first element of the
|
||||
gradient at 12:00 o'clock, going all the way up to 360 degrees clock-wise),
|
||||
and then we show the object. All we need to do now is move and resize it,
|
||||
show it, change the angle etc. and Evas handles it for us.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
</td></tr></table></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td></tr></table>
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
This is not where it ends. there are other primitives that Evas supports.
|
||||
Polygons, Lines and Rectangles complete this list for now, but future plans
|
||||
at a later point may mean Video objects (eg MPEG sterams as objects), curved
|
||||
objects (ellipses, curcles, splines etc.) and more, but for now they are not
|
||||
supported.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<table border=0 cellpadding=0 cellspacing=0><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/tile_shadow_tl.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/tile_shadow_t.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/tile_shadow_l.png><img src=img/blank.gif width=16 height=16></td>
|
||||
<td background=img/tile.png align=left valign=top>
|
||||
|
||||
<img src=img/evas_primitives.png width=128 height=128>
|
||||
<br><img src=img/blank.gif width=144 height=16></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td valign=top align=left><table border=0 cellpadding=8 cellspacing=0><tr><td>
|
||||
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
<center><font face=arial,helvetica,lucida size=4><b>Other Primitives</b></font></center>
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
At your disposal you also have Rectangles, Lines and Polygons too. You can
|
||||
use these to fill in backgrounds, simulate circles (with polygons) and much
|
||||
more. They are versatile and simple and let you do basic drawing withotu
|
||||
requiring on-disk data to generate it from.
|
||||
<font face=arial,helvetica,lucida size=2><p>
|
||||
</td></tr></table></td>
|
||||
</tr><tr>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td background=img/col_black.png><img src=img/blank.gif width=1 height=1></td>
|
||||
<td><img src=img/blank.gif width=1 height=1></td></tr></table>
|
||||
|
||||
</html>
|
||||
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|
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|
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Loading…
Reference in New Issue