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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@gmail.com>
*
*/
#include "glamor_priv.h"
#include <dixfontstr.h>
#include "glamor_transform.h"
static const glamor_facet glamor_facet_poly_glyph_blt = {
.name = "poly_glyph_blt",
.vs_vars = "attribute vec2 primitive;\n",
.vs_exec = (" vec2 pos = vec2(0,0);\n"
GLAMOR_POS(gl_Position, primitive)),
};
static Bool
glamor_poly_glyph_blt_gl(DrawablePtr drawable, GCPtr gc,
int start_x, int y, unsigned int nglyph,
CharInfoPtr *ppci, void *pglyph_base)
{
ScreenPtr screen = drawable->pScreen;
glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
glamor_pixmap_private *pixmap_priv;
glamor_program *prog;
RegionPtr clip = gc->pCompositeClip;
int box_index;
pixmap_priv = glamor_get_pixmap_private(pixmap);
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
goto bail;
glamor_make_current(glamor_priv);
prog = glamor_use_program_fill(pixmap, gc,
&glamor_priv->poly_glyph_blt_progs,
&glamor_facet_poly_glyph_blt);
if (!prog)
goto bail;
glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
start_x += drawable->x;
y += drawable->y;
glamor_pixmap_loop(pixmap_priv, box_index) {
int x;
int n;
int num_points, max_points;
INT16 *points = NULL;
int off_x, off_y;
char *vbo_offset;
glamor_set_destination_drawable(drawable, box_index, FALSE, TRUE,
prog->matrix_uniform, &off_x, &off_y);
max_points = 500;
num_points = 0;
x = start_x;
for (n = 0; n < nglyph; n++) {
CharInfoPtr charinfo = ppci[n];
int w = GLYPHWIDTHPIXELS(charinfo);
int h = GLYPHHEIGHTPIXELS(charinfo);
uint8_t *glyphbits = FONTGLYPHBITS(NULL, charinfo);
if (w && h) {
int glyph_x = x + charinfo->metrics.leftSideBearing;
int glyph_y = y - charinfo->metrics.ascent;
int glyph_stride = GLYPHWIDTHBYTESPADDED(charinfo);
int xx, yy;
for (yy = 0; yy < h; yy++) {
uint8_t *glyph = glyphbits;
for (xx = 0; xx < w; glyph += ((xx&7) == 7), xx++) {
int pt_x_i = glyph_x + xx;
int pt_y_i = glyph_y + yy;
if (!(*glyph & (1 << (xx & 7))))
continue;
if (!RegionContainsPoint(clip, pt_x_i, pt_y_i, NULL))
continue;
if (!num_points) {
points = glamor_get_vbo_space(screen,
max_points *
(2 * sizeof (INT16)),
&vbo_offset);
glVertexAttribPointer(GLAMOR_VERTEX_POS,
2, GL_SHORT,
GL_FALSE, 0, vbo_offset);
}
*points++ = pt_x_i;
*points++ = pt_y_i;
num_points++;
if (num_points == max_points) {
glamor_put_vbo_space(screen);
glDrawArrays(GL_POINTS, 0, num_points);
num_points = 0;
}
}
glyphbits += glyph_stride;
}
}
x += charinfo->metrics.characterWidth;
}
if (num_points) {
glamor_put_vbo_space(screen);
glDrawArrays(GL_POINTS, 0, num_points);
}
}
glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
return TRUE;
bail:
return FALSE;
}
void
glamor_poly_glyph_blt(DrawablePtr drawable, GCPtr gc,
int start_x, int y, unsigned int nglyph,
CharInfoPtr *ppci, void *pglyph_base)
{
if (glamor_poly_glyph_blt_gl(drawable, gc, start_x, y, nglyph, ppci,
pglyph_base))
return;
miPolyGlyphBlt(drawable, gc, start_x, y, nglyph,
ppci, pglyph_base);
}
static Bool
glamor_push_pixels_gl(GCPtr gc, PixmapPtr bitmap,
DrawablePtr drawable, int w, int h, int x, int y)
{
ScreenPtr screen = drawable->pScreen;
glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
glamor_pixmap_private *pixmap_priv;
uint8_t *bitmap_data = bitmap->devPrivate.ptr;
int bitmap_stride = bitmap->devKind;
glamor_program *prog;
RegionPtr clip = gc->pCompositeClip;
int box_index;
int yy, xx;
int num_points;
INT16 *points = NULL;
char *vbo_offset;
if (w * h > MAXINT / (2 * sizeof(float)))
goto bail;
pixmap_priv = glamor_get_pixmap_private(pixmap);
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
goto bail;
glamor_make_current(glamor_priv);
prog = glamor_use_program_fill(pixmap, gc,
&glamor_priv->poly_glyph_blt_progs,
&glamor_facet_poly_glyph_blt);
if (!prog)
goto bail;
glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
points = glamor_get_vbo_space(screen, w * h * sizeof(INT16) * 2,
&vbo_offset);
num_points = 0;
/* Note that because fb sets miTranslate in the GC, our incoming X
* and Y are in screen coordinate space (same for spans, but not
* other operations).
*/
for (yy = 0; yy < h; yy++) {
uint8_t *bitmap_row = bitmap_data + yy * bitmap_stride;
for (xx = 0; xx < w; xx++) {
if (bitmap_row[xx / 8] & (1 << xx % 8) &&
RegionContainsPoint(clip,
x + xx,
y + yy,
NULL)) {
*points++ = x + xx;
*points++ = y + yy;
num_points++;
}
}
}
glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT,
GL_FALSE, 0, vbo_offset);
glamor_put_vbo_space(screen);
glamor_pixmap_loop(pixmap_priv, box_index) {
glamor_set_destination_drawable(drawable, box_index, FALSE, TRUE,
prog->matrix_uniform, NULL, NULL);
glDrawArrays(GL_POINTS, 0, num_points);
}
glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
return TRUE;
bail:
return FALSE;
}
void
glamor_push_pixels(GCPtr pGC, PixmapPtr pBitmap,
DrawablePtr pDrawable, int w, int h, int x, int y)
{
if (glamor_push_pixels_gl(pGC, pBitmap, pDrawable, w, h, x, y))
return;
miPushPixels(pGC, pBitmap, pDrawable, w, h, x, y);
}
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