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2007-12-05 Matthew Allum <mallum@openedhand.com>

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* clutter/pango/pangoclutter-render.c:
        Prefer rendering with npots textures over pots textures if
        available (essentially makes applying shaders easier)
        Also convert some float to fixed.
This commit is contained in:
Matthew Allum 2007-12-05 21:41:43 +00:00
parent 4ff25a291c
commit 8e44f0613f
2 changed files with 73 additions and 36 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2007-12-05 Matthew Allum <mallum@openedhand.com>
reviewed by: <delete if not using a buddy>
* clutter/pango/pangoclutter-render.c: (tc_get), (free_glyph_info),
(draw_glyph), (draw_trapezoid), (pango_clutter_render_layout),
(pango_clutter_render_layout_line),
(pango_clutter_render_clear_caches), (prepare_run), (draw_begin):
2007-12-05 Emmanuele Bassi <ebassi@openedhand.com>
* clutter/clutter-score.h: Rearrange declarations.

90
clutter/pango/pangoclutter-render.c
View File

@ -115,9 +115,17 @@ tc_get (tc_area *area, int width, int height)
/* create a new texture if necessary */
if (!match)
{
COGLenum texture_target_type = CGL_TEXTURE_2D;
CLUTTER_NOTE (PANGO, "creating new texture %i x %i",
TC_WIDTH, TC_HEIGHT);
/* Use NPOTS if available as it simply makes shaders easier to
* work with on text.
*/
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_RECTANGLE))
texture_target_type = CGL_TEXTURE_RECTANGLE_ARB;
match = g_slice_new (tc_texture);
match->next = first_texture;
first_texture = match;
@ -125,15 +133,16 @@ tc_get (tc_area *area, int width, int height)
cogl_textures_create (1, &match->name);
cogl_texture_bind (CGL_TEXTURE_2D, match->name);
cogl_texture_bind (texture_target_type, match->name);
/* We might even want to use mipmapping instead of CGL_LINEAR here
* that should allow rerendering of glyphs to look nice even at scales
* far below 50%.
*/
cogl_texture_set_filters (CGL_TEXTURE_2D, CGL_LINEAR, CGL_NEAREST);
cogl_texture_set_filters (texture_target_type,
CGL_LINEAR, CGL_NEAREST);
cogl_texture_image_2d (CGL_TEXTURE_2D,
cogl_texture_image_2d (texture_target_type,
CGL_ALPHA,
TC_WIDTH,
TC_HEIGHT,
@ -188,6 +197,7 @@ struct _PangoClutterRenderer
ClutterColor color;
int flags;
guint curtex; /* current texture */
COGLenum texture_target_type; /* 2D or Rect */
};
G_DEFINE_TYPE (PangoClutterRenderer, \
@ -319,11 +329,12 @@ static void
draw_glyph (PangoRenderer *renderer_,
PangoFont *font,
PangoGlyph glyph,
double x,
double y)
double xd,
double yd)
{
PangoClutterRenderer *renderer = PANGO_CLUTTER_RENDERER (renderer_);
glyph_info *g;
gint x = (gint)xd, y = (gint)yd;
struct { float x1, y1, x2, y2; } box;
if (glyph & PANGO_GLYPH_UNKNOWN_FLAG)
@ -359,12 +370,12 @@ draw_glyph (PangoRenderer *renderer_,
CLUTTER_NOTE (PANGO, "cache fail; subimage2d %i", glyph);
cogl_texture_bind (renderer->texture_target_type, g->tex.name);
cogl_texture_bind (CGL_TEXTURE_2D, g->tex.name);
cogl_texture_set_alignment (renderer->texture_target_type,
1, bm.stride);
cogl_texture_set_alignment (CGL_TEXTURE_2D, 1, bm.stride);
cogl_texture_sub_image_2d (CGL_TEXTURE_2D,
cogl_texture_sub_image_2d (renderer->texture_target_type,
g->tex.x,
g->tex.y,
bm.width,
@ -373,7 +384,8 @@ draw_glyph (PangoRenderer *renderer_,
CGL_UNSIGNED_BYTE,
bm.bitmap);
glTexParameteri (CGL_TEXTURE_2D, GL_GENERATE_MIPMAP, FALSE);
glTexParameteri (renderer->texture_target_type,
GL_GENERATE_MIPMAP, FALSE);
renderer->curtex = g->tex.name;
}
@ -382,25 +394,39 @@ draw_glyph (PangoRenderer *renderer_,
x += g->left;
y -= g->top;
box.x1 = g->tex.x * (1. / TC_WIDTH );
box.y1 = g->tex.y * (1. / TC_HEIGHT);
box.x2 = g->tex.w * (1. / TC_WIDTH ) + box.x1;
box.y2 = g->tex.h * (1. / TC_HEIGHT) + box.y1;
if (g->tex.name != renderer->curtex)
{
cogl_texture_bind (CGL_TEXTURE_2D, g->tex.name);
cogl_texture_bind (renderer->texture_target_type, g->tex.name);
renderer->curtex = g->tex.name;
}
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_RECTANGLE))
{
cogl_texture_quad (x,
x + g->tex.w,
y,
y + g->tex.h,
CLUTTER_INT_TO_FIXED (g->tex.x),
CLUTTER_INT_TO_FIXED (g->tex.y),
CLUTTER_INT_TO_FIXED (g->tex.w + g->tex.x),
CLUTTER_INT_TO_FIXED (g->tex.h + g->tex.y));
}
else
{
ClutterFixed fx, fy;
fx = CLUTTER_INT_TO_FIXED (g->tex.x) / TC_WIDTH;
fy = CLUTTER_INT_TO_FIXED (g->tex.y) / TC_HEIGHT;
cogl_texture_quad (x,
x + g->tex.w,
y,
y + g->tex.h,
CLUTTER_FLOAT_TO_FIXED (box.x1),
CLUTTER_FLOAT_TO_FIXED (box.y1),
CLUTTER_FLOAT_TO_FIXED (box.x2),
CLUTTER_FLOAT_TO_FIXED (box.y2));
fx,
fy,
CLUTTER_INT_TO_FIXED (g->tex.w) / TC_WIDTH + fx,
CLUTTER_INT_TO_FIXED (g->tex.h) / TC_HEIGHT + fy);
}
}
static void
@ -432,9 +458,13 @@ draw_trapezoid (PangoRenderer *renderer_,
(gint) x22);
/* Turn it back on again */
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_RECTANGLE))
cogl_enable (CGL_ENABLE_TEXTURE_RECT|CGL_ENABLE_BLEND);
else
cogl_enable (CGL_ENABLE_TEXTURE_2D|CGL_ENABLE_BLEND);
}
void
pango_clutter_render_layout_subpixel (PangoLayout *layout,
int x,
@ -501,6 +531,11 @@ pango_clutter_render_clear_caches (void)
static void
pango_clutter_renderer_init (PangoClutterRenderer *renderer)
{
renderer->texture_target_type = CGL_TEXTURE_2D;
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_RECTANGLE))
renderer->texture_target_type = CGL_TEXTURE_RECTANGLE_ARB;
memset (&renderer->color, 0xff, sizeof(ClutterColor));
}
@ -569,17 +604,10 @@ draw_begin (PangoRenderer *renderer_)
renderer->curtex = 0;
cogl_enable (CGL_ENABLE_TEXTURE_2D
|CGL_ENABLE_BLEND);
#if 0
gl_BlendFuncSeparate (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA,
GL_ONE , GL_ONE_MINUS_SRC_ALPHA);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable (GL_ALPHA_TEST);
glAlphaFunc (GL_GREATER, 0.01f);
#endif
if (clutter_feature_available (CLUTTER_FEATURE_TEXTURE_RECTANGLE))
cogl_enable (CGL_ENABLE_TEXTURE_RECT|CGL_ENABLE_BLEND);
else
cogl_enable (CGL_ENABLE_TEXTURE_2D|CGL_ENABLE_BLEND);
}
static void