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glamor: Add a helper function for the common GL_QUADS fallback pattern.

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We should do better than this with an index buffer, but for now at
least make it so that we don't have to copy the same code to new
places.

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Eric Anholt 2015-02-04 14:38:15 -08:00
parent 909a406aa2
commit 9e9fcf5780
4 changed files with 20 additions and 23 deletions
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8
glamor/glamor_copy.c
View file

@ -387,13 +387,7 @@ glamor_copy_fbo_fbo_draw(DrawablePtr src,
src_box->x2 - src_box->x1,
src_box->y2 - src_box->y1);
if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP)
glDrawArrays(GL_QUADS, 0, nbox * 4);
else {
int i;
for (i = 0; i < nbox; i++)
glDrawArrays(GL_TRIANGLE_FAN, i*4, 4);
}
glamor_glDrawArrays_GL_QUADS(glamor_priv, nbox);
}
}
glDisable(GL_SCISSOR_TEST);

9
glamor/glamor_rects.c
View file

@ -126,14 +126,7 @@ glamor_poly_fill_rect_gl(DrawablePtr drawable,
if (glamor_priv->glsl_version >= 130)
glDrawArraysInstanced(GL_TRIANGLE_STRIP, 0, 4, nrect);
else {
if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP) {
glDrawArrays(GL_QUADS, 0, nrect * 4);
} else {
int i;
for (i = 0; i < nrect; i++) {
glDrawArrays(GL_TRIANGLE_FAN, i * 4, 4);
}
}
glamor_glDrawArrays_GL_QUADS(glamor_priv, nrect);
}
}
}

9
glamor/glamor_spans.c
View file

@ -134,14 +134,7 @@ glamor_fill_spans_gl(DrawablePtr drawable,
if (glamor_priv->glsl_version >= 130)
glDrawArraysInstanced(GL_TRIANGLE_STRIP, 0, 4, n);
else {
if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP) {
glDrawArrays(GL_QUADS, 0, 4 * n);
} else {
int i;
for (i = 0; i < n; i++) {
glDrawArrays(GL_TRIANGLE_FAN, i * 4, 4);
}
}
glamor_glDrawArrays_GL_QUADS(glamor_priv, nbox);
}
}
}

17
glamor/glamor_utils.h
View file

@ -1393,4 +1393,21 @@ glamor_make_current(glamor_screen_private *glamor_priv)
}
}
/**
* Helper function for implementing draws with GL_QUADS on GLES2,
* where we don't have them.
*/
static inline void
glamor_glDrawArrays_GL_QUADS(glamor_screen_private *glamor_priv, unsigned count)
{
if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP) {
glDrawArrays(GL_QUADS, 0, count * 4);
} else {
unsigned i;
for (i = 0; i < count; i++)
glDrawArrays(GL_TRIANGLE_FAN, i * 4, 4);
}
}
#endif