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Fully integrates CoglMaterial throughout the rest of Cogl

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This glues CoglMaterial in as the fundamental way that Cogl describes how to
fill in geometry.

It adds cogl_set_source (), which is used to set the material which will be
used by all subsequent drawing functions

It adds cogl_set_source_texture as a convenience for setting up a default
material with a single texture layer, and cogl_set_source_color is now also
a convenience for setting up a material with a solid fill.

"drawing functions" include, cogl_rectangle, cogl_texture_rectangle,
cogl_texture_multiple_rectangles, cogl_texture_polygon (though the
cogl_texture_* funcs have been renamed; see below for details),
cogl_path_fill/stroke and cogl_vertex_buffer_draw*.

cogl_texture_rectangle, cogl_texture_multiple_rectangles and
cogl_texture_polygon no longer take a texture handle; instead the current
source material is referenced. The functions have also been renamed to:
cogl_rectangle_with_texture_coords, cogl_rectangles_with_texture_coords
and cogl_polygon respectivly.

Most code that previously did:
  cogl_texture_rectangle (tex_handle, x, y,...);
needs to be changed to now do:
  cogl_set_source_texture (tex_handle);
  cogl_rectangle_with_texture_coords (x, y,....);

In the less likely case where you were blending your source texture with a color
like:
  cogl_set_source_color4ub (r,g,b,a); /* where r,g,b,a isn't just white */
  cogl_texture_rectangle (tex_handle, x, y,...);
you will need your own material to do that:
  mat = cogl_material_new ();
  cogl_material_set_color4ub (r,g,b,a);
  cogl_material_set_layer (mat, 0, tex_handle));
  cogl_set_source_material (mat);

Code that uses the texture coordinates, 0, 0, 1, 1 don't need to use
cog_rectangle_with_texure_coords since these are the coordinates that
cogl_rectangle will use.

For cogl_texture_polygon; as well as dropping the texture handle, the
n_vertices and vertices arguments were transposed for consistency. So
code previously written as:
  cogl_texture_polygon (tex_handle, 3, verts, TRUE);
need to be written as:
  cogl_set_source_texture (tex_handle);
  cogl_polygon (verts, 3, TRUE);

All of the unit tests have been updated to now use the material API and
test-cogl-material has been renamed to test-cogl-multitexture since any
textured quad is now technically a test of CoglMaterial but this test
specifically creates a material with multiple texture layers.

Note: The GLES backend has not been updated yet; that will be done in a
following commit.
This commit is contained in:
Robert Bragg
2009-01-23 16:15:40 +00:00
parent 3d07e34cc5
commit 5985eef44c
30 changed files with 2235 additions and 1153 deletions
Download Patch File Download Diff File Expand all files Collapse all files

114
clutter/pango/cogl-pango-render.c
View File

@ -42,8 +42,10 @@ struct _CoglPangoRenderer
{
PangoRenderer parent_instance;
/* The color to draw the glyphs with */
CoglColor color;
/* The material used to texture from the glyph cache with */
CoglHandle glyph_material;
/* The material used for solid fills. (boxes, rectangles + trapezoids) */
CoglHandle solid_material;
/* Two caches of glyphs as textures, one with mipmapped textures and
one without */
@ -68,8 +70,10 @@ cogl_pango_renderer_glyphs_end (CoglPangoRenderer *priv)
if (priv->glyph_rectangles->len > 0)
{
float *rectangles = (float *) priv->glyph_rectangles->data;
cogl_texture_multiple_rectangles (priv->glyph_texture, rectangles,
priv->glyph_rectangles->len / 8);
cogl_material_set_layer (priv->glyph_material, 0, priv->glyph_texture);
cogl_set_source (priv->glyph_material);
cogl_rectangles_with_texture_coords (rectangles,
priv->glyph_rectangles->len / 8);
g_array_set_size (priv->glyph_rectangles, 0);
}
}
@ -128,6 +132,38 @@ G_DEFINE_TYPE (CoglPangoRenderer, cogl_pango_renderer, PANGO_TYPE_RENDERER);
static void
cogl_pango_renderer_init (CoglPangoRenderer *priv)
{
priv->glyph_material = cogl_material_new ();
/* The default combine mode of materials is to modulate (A x B) the texture
* RGBA channels with the RGBA channels of the previous layer (which in our
* case is just the solid font color)
*
* Since our glyph cache textures are component alpha textures, and so the
* RGB channels are defined as (0, 0, 0) we don't want to modulate the RGB
* channels, instead we want to simply replace them with our solid font
* color...
*
* XXX: we could really do with a neat string based way for describing
* combine modes, like: "REPLACE(PREVIOUS[RGB])"
* XXX: potentially materials could have a fuzzy default combine mode
* such that they default to this for component alpha textures? This would
* give the same semantics as the old-style GL_MODULATE mode but sounds a
* bit hacky.
*/
cogl_material_set_layer_combine_function (
priv->glyph_material,
0, /* layer */
COGL_MATERIAL_LAYER_COMBINE_CHANNELS_RGB,
COGL_MATERIAL_LAYER_COMBINE_FUNC_REPLACE);
cogl_material_set_layer_combine_arg_src (
priv->glyph_material,
0, /* layer */
0, /* arg */
COGL_MATERIAL_LAYER_COMBINE_CHANNELS_RGB,
COGL_MATERIAL_LAYER_COMBINE_SRC_PREVIOUS);
priv->solid_material = cogl_material_new ();
priv->glyph_cache = cogl_pango_glyph_cache_new (FALSE);
priv->mipmapped_glyph_cache = cogl_pango_glyph_cache_new (TRUE);
priv->use_mipmapping = FALSE;
@ -203,7 +239,8 @@ cogl_pango_render_layout_subpixel (PangoLayout *layout,
if (G_UNLIKELY (!priv))
return;
priv->color = *color;
cogl_material_set_color (priv->glyph_material, color);
cogl_material_set_color (priv->solid_material, color);
pango_renderer_draw_layout (PANGO_RENDERER (priv), layout, x, y);
}
@ -259,7 +296,8 @@ cogl_pango_render_layout_line (PangoLayoutLine *line,
if (G_UNLIKELY (!priv))
return;
priv->color = *color;
cogl_material_set_color (priv->glyph_material, color);
cogl_material_set_color (priv->solid_material, color);
pango_renderer_draw_layout_line (PANGO_RENDERER (priv), line, x, y);
}
@ -351,12 +389,12 @@ cogl_pango_ensure_glyph_cache_for_layout (PangoLayout *layout)
PangoContext *context;
PangoRenderer *renderer;
PangoLayoutIter *iter;
g_return_if_fail (PANGO_IS_LAYOUT (layout));
if ((iter = pango_layout_get_iter (layout)) == NULL)
return;
context = pango_layout_get_context (layout);
renderer =
PANGO_RENDERER (cogl_pango_get_renderer_from_context (context));
@ -365,19 +403,19 @@ cogl_pango_ensure_glyph_cache_for_layout (PangoLayout *layout)
{
PangoLayoutLine *line;
GSList *l;
line = pango_layout_iter_get_line_readonly (iter);
for (l = line->runs; l; l = l->next)
{
PangoLayoutRun *run = l->data;
PangoGlyphString *glyphs = run->glyphs;
int i;
for (i = 0; i < glyphs->num_glyphs; i++)
{
PangoGlyphInfo *gi = &glyphs->glyphs[i];
cogl_pango_renderer_get_cached_glyph (renderer,
run->item->analysis.font,
gi->glyph);
@ -385,7 +423,7 @@ cogl_pango_ensure_glyph_cache_for_layout (PangoLayout *layout)
}
}
while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
}
@ -398,19 +436,32 @@ cogl_pango_renderer_set_color_for_part (PangoRenderer *renderer,
if (pango_color)
{
cogl_set_source_color4ub (pango_color->red >> 8,
pango_color->green >> 8,
pango_color->blue >> 8,
cogl_color_get_alpha_byte (&priv->color));
CoglColor color;
guint8 red = pango_color->red >> 8;
guint8 green = pango_color->green >> 8;
guint8 blue = pango_color->blue >> 8;
guint8 alpha;
cogl_material_get_color (priv->solid_material, &color);
alpha = cogl_color_get_alpha_byte (&color);
cogl_material_set_color4ub (priv->solid_material,
red, green, blue, alpha);
cogl_material_set_color4ub (priv->glyph_material,
red, green, blue, alpha);
}
else
cogl_set_source_color (&priv->color);
}
static void
cogl_pango_renderer_draw_box (int x, int y,
int width, int height)
cogl_pango_renderer_draw_box (PangoRenderer *renderer,
int x,
int y,
int width,
int height)
{
CoglPangoRenderer *priv = COGL_PANGO_RENDERER (renderer);
cogl_set_source (priv->solid_material);
cogl_path_rectangle ((float)(x),
(float)(y - height),
(float)(width),
@ -450,6 +501,7 @@ cogl_pango_renderer_draw_rectangle (PangoRenderer *renderer,
int width,
int height)
{
CoglPangoRenderer *priv = COGL_PANGO_RENDERER (renderer);
float x1, x2, y1, y2;
cogl_pango_renderer_set_color_for_part (renderer, part);
@ -461,6 +513,7 @@ cogl_pango_renderer_draw_rectangle (PangoRenderer *renderer,
x + width, y + height,
&x2, &y2);
cogl_set_source (priv->solid_material);
cogl_rectangle (x1, y1, x2 - x1, y2 - y1);
}
@ -474,6 +527,7 @@ cogl_pango_renderer_draw_trapezoid (PangoRenderer *renderer,
double x12,
double x22)
{
CoglPangoRenderer *priv = COGL_PANGO_RENDERER (renderer);
float points[8];
points[0] = (x11);
@ -487,6 +541,7 @@ cogl_pango_renderer_draw_trapezoid (PangoRenderer *renderer,
cogl_pango_renderer_set_color_for_part (renderer, part);
cogl_set_source (priv->solid_material);
cogl_path_polygon (points, 4);
cogl_path_fill ();
}
@ -524,15 +579,17 @@ cogl_pango_renderer_draw_glyphs (PangoRenderer *renderer,
if (font == NULL ||
(metrics = pango_font_get_metrics (font, NULL)) == NULL)
{
cogl_pango_renderer_draw_box ( (x),
(y),
cogl_pango_renderer_draw_box (renderer,
x,
y,
PANGO_UNKNOWN_GLYPH_WIDTH,
PANGO_UNKNOWN_GLYPH_HEIGHT);
}
else
{
cogl_pango_renderer_draw_box ( (x),
(y),
cogl_pango_renderer_draw_box (renderer,
x,
y,
metrics->approximate_char_width
/ PANGO_SCALE,
metrics->ascent / PANGO_SCALE);
@ -553,8 +610,9 @@ cogl_pango_renderer_draw_glyphs (PangoRenderer *renderer,
{
cogl_pango_renderer_glyphs_end (priv);
cogl_pango_renderer_draw_box ( (x),
(y),
cogl_pango_renderer_draw_box (renderer,
x,
y,
PANGO_UNKNOWN_GLYPH_WIDTH,
PANGO_UNKNOWN_GLYPH_HEIGHT);
}