252 lines
8.3 KiB
C
252 lines
8.3 KiB
C
/*
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* Copyright © 2009 Intel Corporation
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* Copyright © 1998 Keith Packard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Zhigang Gong <zhigang.gong@gmail.com>
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*
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*/
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#include "glamor_priv.h"
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#include <dixfontstr.h>
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#include "glamor_transform.h"
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static const glamor_facet glamor_facet_poly_glyph_blt = {
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.name = "poly_glyph_blt",
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.vs_vars = "attribute vec2 primitive;\n",
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.vs_exec = (" vec2 pos = vec2(0,0);\n"
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GLAMOR_POS(gl_Position, primitive)),
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};
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static Bool
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glamor_poly_glyph_blt_gl(DrawablePtr drawable, GCPtr gc,
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int start_x, int y, unsigned int nglyph,
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CharInfoPtr *ppci, void *pglyph_base)
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{
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ScreenPtr screen = drawable->pScreen;
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glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
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glamor_pixmap_private *pixmap_priv;
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glamor_program *prog;
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RegionPtr clip = gc->pCompositeClip;
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int box_index;
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Bool ret = FALSE;
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pixmap_priv = glamor_get_pixmap_private(pixmap);
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if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
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goto bail;
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glamor_make_current(glamor_priv);
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prog = glamor_use_program_fill(pixmap, gc,
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&glamor_priv->poly_glyph_blt_progs,
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&glamor_facet_poly_glyph_blt);
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if (!prog)
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goto bail;
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glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
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start_x += drawable->x;
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y += drawable->y;
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glamor_pixmap_loop(pixmap_priv, box_index) {
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int x;
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int n;
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int num_points, max_points;
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INT16 *points = NULL;
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int off_x, off_y;
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char *vbo_offset;
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if (!glamor_set_destination_drawable(drawable, box_index, FALSE, TRUE,
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prog->matrix_uniform, &off_x, &off_y))
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goto bail;
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max_points = 500;
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num_points = 0;
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x = start_x;
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for (n = 0; n < nglyph; n++) {
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CharInfoPtr charinfo = ppci[n];
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int w = GLYPHWIDTHPIXELS(charinfo);
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int h = GLYPHHEIGHTPIXELS(charinfo);
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uint8_t *glyphbits = FONTGLYPHBITS(NULL, charinfo);
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if (w && h) {
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int glyph_x = x + charinfo->metrics.leftSideBearing;
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int glyph_y = y - charinfo->metrics.ascent;
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int glyph_stride = GLYPHWIDTHBYTESPADDED(charinfo);
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int xx, yy;
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for (yy = 0; yy < h; yy++) {
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uint8_t *glyph = glyphbits;
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for (xx = 0; xx < w; glyph += ((xx&7) == 7), xx++) {
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int pt_x_i = glyph_x + xx;
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int pt_y_i = glyph_y + yy;
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if (!(*glyph & (1 << (xx & 7))))
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continue;
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if (!RegionContainsPoint(clip, pt_x_i, pt_y_i, NULL))
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continue;
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if (!num_points) {
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points = glamor_get_vbo_space(screen,
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max_points *
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(2 * sizeof (INT16)),
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&vbo_offset);
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glVertexAttribPointer(GLAMOR_VERTEX_POS,
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2, GL_SHORT,
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GL_FALSE, 0, vbo_offset);
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}
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*points++ = pt_x_i;
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*points++ = pt_y_i;
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num_points++;
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if (num_points == max_points) {
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glamor_put_vbo_space(screen);
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glDrawArrays(GL_POINTS, 0, num_points);
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num_points = 0;
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}
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}
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glyphbits += glyph_stride;
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}
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}
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x += charinfo->metrics.characterWidth;
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}
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if (num_points) {
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glamor_put_vbo_space(screen);
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glDrawArrays(GL_POINTS, 0, num_points);
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}
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}
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ret = TRUE;
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bail:
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glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
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return ret;
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}
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void
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glamor_poly_glyph_blt(DrawablePtr drawable, GCPtr gc,
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int start_x, int y, unsigned int nglyph,
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CharInfoPtr *ppci, void *pglyph_base)
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{
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if (glamor_poly_glyph_blt_gl(drawable, gc, start_x, y, nglyph, ppci,
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pglyph_base))
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return;
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miPolyGlyphBlt(drawable, gc, start_x, y, nglyph,
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ppci, pglyph_base);
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}
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static Bool
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glamor_push_pixels_gl(GCPtr gc, PixmapPtr bitmap,
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DrawablePtr drawable, int w, int h, int x, int y)
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{
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ScreenPtr screen = drawable->pScreen;
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glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
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glamor_pixmap_private *pixmap_priv;
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uint8_t *bitmap_data = bitmap->devPrivate.ptr;
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int bitmap_stride = bitmap->devKind;
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glamor_program *prog;
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RegionPtr clip = gc->pCompositeClip;
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int box_index;
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int yy, xx;
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int num_points;
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INT16 *points = NULL;
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char *vbo_offset;
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Bool ret = FALSE;
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if (w * h > MAXINT / (2 * sizeof(float)))
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goto bail;
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pixmap_priv = glamor_get_pixmap_private(pixmap);
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if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
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goto bail;
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glamor_make_current(glamor_priv);
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prog = glamor_use_program_fill(pixmap, gc,
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&glamor_priv->poly_glyph_blt_progs,
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&glamor_facet_poly_glyph_blt);
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if (!prog)
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goto bail;
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glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
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points = glamor_get_vbo_space(screen, w * h * sizeof(INT16) * 2,
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&vbo_offset);
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num_points = 0;
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/* Note that because fb sets miTranslate in the GC, our incoming X
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* and Y are in screen coordinate space (same for spans, but not
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* other operations).
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*/
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for (yy = 0; yy < h; yy++) {
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uint8_t *bitmap_row = bitmap_data + yy * bitmap_stride;
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for (xx = 0; xx < w; xx++) {
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if (bitmap_row[xx / 8] & (1 << xx % 8) &&
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RegionContainsPoint(clip,
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x + xx,
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y + yy,
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NULL)) {
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*points++ = x + xx;
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*points++ = y + yy;
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num_points++;
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}
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}
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}
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glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT,
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GL_FALSE, 0, vbo_offset);
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glamor_put_vbo_space(screen);
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glamor_pixmap_loop(pixmap_priv, box_index) {
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if (!glamor_set_destination_drawable(drawable, box_index, FALSE, TRUE,
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prog->matrix_uniform, NULL, NULL))
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goto bail;
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glDrawArrays(GL_POINTS, 0, num_points);
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}
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ret = TRUE;
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bail:
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glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
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return ret;
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}
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void
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glamor_push_pixels(GCPtr pGC, PixmapPtr pBitmap,
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DrawablePtr pDrawable, int w, int h, int x, int y)
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{
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if (glamor_push_pixels_gl(pGC, pBitmap, pDrawable, w, h, x, y))
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return;
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miPushPixels(pGC, pBitmap, pDrawable, w, h, x, y);
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}
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