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/*
* Copyright © 2009 Intel Corporation
* Copyright © 1998 Keith Packard
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Zhigang Gong <zhigang.gong@linux.intel.com>
*
*/
#include "glamor_priv.h"
#include "glamor_transform.h"
static const glamor_facet glamor_facet_point = {
.name = "poly_point",
.vs_vars = "attribute vec2 primitive;\n",
.vs_exec = GLAMOR_POS(gl_Position, primitive),
};
static Bool
glamor_poly_point_gl(DrawablePtr drawable, GCPtr gc, int mode, int npt, DDXPointPtr ppt)
{
ScreenPtr screen = drawable->pScreen;
glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
glamor_program *prog = &glamor_priv->point_prog;
glamor_pixmap_private *pixmap_priv;
int off_x, off_y;
GLshort *vbo_ppt;
char *vbo_offset;
int box_x, box_y;
pixmap_priv = glamor_get_pixmap_private(pixmap);
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
goto bail;
glamor_make_current(glamor_priv);
if (prog->failed)
goto bail;
if (!prog->prog) {
if (!glamor_build_program(screen, prog,
&glamor_facet_point,
&glamor_fill_solid))
goto bail;
}
if (!glamor_use_program(pixmap, gc, prog, NULL))
goto bail;
vbo_ppt = glamor_get_vbo_space(screen, npt * (2 * sizeof (INT16)), &vbo_offset);
glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE, 0, vbo_offset);
if (mode == CoordModePrevious) {
int n = npt;
INT16 x = 0, y = 0;
while (n--) {
vbo_ppt[0] = (x += ppt->x);
vbo_ppt[1] = (y += ppt->y);
vbo_ppt += 2;
ppt++;
}
} else
memcpy(vbo_ppt, ppt, npt * (2 * sizeof (INT16)));
glamor_put_vbo_space(screen);
glEnable(GL_SCISSOR_TEST);
glamor_pixmap_loop(pixmap_priv, box_x, box_y) {
int nbox = RegionNumRects(gc->pCompositeClip);
BoxPtr box = RegionRects(gc->pCompositeClip);
glamor_set_destination_drawable(drawable, box_x, box_y, TRUE, TRUE, prog->matrix_uniform, &off_x, &off_y);
while (nbox--) {
glScissor(box->x1 + off_x,
box->y1 + off_y,
box->x2 - box->x1,
box->y2 - box->y1);
box++;
glDrawArrays(GL_POINTS, 0, npt);
}
}
glDisable(GL_SCISSOR_TEST);
glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
return TRUE;
bail:
return FALSE;
}
void
glamor_poly_point(DrawablePtr drawable, GCPtr gc, int mode, int npt,
DDXPointPtr ppt)
{
if (glamor_poly_point_gl(drawable, gc, mode, npt, ppt))
return;
miPolyPoint(drawable, gc, mode, npt, ppt);
}
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