xenocara/xserver/glamor/glamor_spans.c

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/*
* Copyright © 2014 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include "glamor_priv.h"
#include "glamor_transform.h"
#include "glamor_transfer.h"
glamor_program fill_spans_progs[4];
static const glamor_facet glamor_facet_fillspans_130 = {
.name = "fill_spans",
.version = 130,
.vs_vars = "attribute vec3 primitive;\n",
.vs_exec = (" vec2 pos = vec2(primitive.z,1) * vec2(gl_VertexID&1, (gl_VertexID&2)>>1);\n"
GLAMOR_POS(gl_Position, (primitive.xy + pos))),
};
static const glamor_facet glamor_facet_fillspans_120 = {
.name = "fill_spans",
.vs_vars = "attribute vec2 primitive;\n",
.vs_exec = (" vec2 pos = vec2(0,0);\n"
GLAMOR_POS(gl_Position, primitive.xy)),
};
static Bool
glamor_fill_spans_gl(DrawablePtr drawable,
GCPtr gc,
int n, DDXPointPtr points, int *widths, int sorted)
{
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;
int off_x, off_y;
GLshort *v;
char *vbo_offset;
int c;
int box_index;
Bool ret = FALSE;
pixmap_priv = glamor_get_pixmap_private(pixmap);
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
goto bail;
glamor_make_current(glamor_priv);
if (glamor_priv->glsl_version >= 130) {
prog = glamor_use_program_fill(pixmap, gc, &glamor_priv->fill_spans_program,
&glamor_facet_fillspans_130);
if (!prog)
goto bail;
/* Set up the vertex buffers for the points */
v = glamor_get_vbo_space(drawable->pScreen, n * (4 * sizeof (GLshort)), &vbo_offset);
glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
glVertexAttribDivisor(GLAMOR_VERTEX_POS, 1);
glVertexAttribPointer(GLAMOR_VERTEX_POS, 3, GL_SHORT, GL_FALSE,
4 * sizeof (GLshort), vbo_offset);
for (c = 0; c < n; c++) {
v[0] = points->x;
v[1] = points->y;
v[2] = *widths++;
points++;
v += 4;
}
glamor_put_vbo_space(screen);
} else {
prog = glamor_use_program_fill(pixmap, gc, &glamor_priv->fill_spans_program,
&glamor_facet_fillspans_120);
if (!prog)
goto bail;
/* Set up the vertex buffers for the points */
v = glamor_get_vbo_space(drawable->pScreen, n * 8 * sizeof (short), &vbo_offset);
glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE,
2 * sizeof (short), vbo_offset);
for (c = 0; c < n; c++) {
v[0] = points->x; v[1] = points->y;
v[2] = points->x; v[3] = points->y + 1;
v[4] = points->x + *widths; v[5] = points->y + 1;
v[6] = points->x + *widths; v[7] = points->y;
widths++;
points++;
v += 8;
}
glamor_put_vbo_space(screen);
}
glEnable(GL_SCISSOR_TEST);
glamor_pixmap_loop(pixmap_priv, box_index) {
int nbox = RegionNumRects(gc->pCompositeClip);
BoxPtr box = RegionRects(gc->pCompositeClip);
if (!glamor_set_destination_drawable(drawable, box_index, FALSE, FALSE,
prog->matrix_uniform, &off_x, &off_y))
goto bail;
while (nbox--) {
glScissor(box->x1 + off_x,
box->y1 + off_y,
box->x2 - box->x1,
box->y2 - box->y1);
box++;
if (glamor_priv->glsl_version >= 130)
glDrawArraysInstanced(GL_TRIANGLE_STRIP, 0, 4, n);
else {
glamor_glDrawArrays_GL_QUADS(glamor_priv, n);
}
}
}
ret = TRUE;
bail:
glDisable(GL_SCISSOR_TEST);
if (glamor_priv->glsl_version >= 130)
glVertexAttribDivisor(GLAMOR_VERTEX_POS, 0);
glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
return ret;
}
static void
glamor_fill_spans_bail(DrawablePtr drawable,
GCPtr gc,
int n, DDXPointPtr points, int *widths, int sorted)
{
if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW) &&
glamor_prepare_access_gc(gc)) {
fbFillSpans(drawable, gc, n, points, widths, sorted);
}
glamor_finish_access_gc(gc);
glamor_finish_access(drawable);
}
void
glamor_fill_spans(DrawablePtr drawable,
GCPtr gc,
int n, DDXPointPtr points, int *widths, int sorted)
{
if (glamor_fill_spans_gl(drawable, gc, n, points, widths, sorted))
return;
glamor_fill_spans_bail(drawable, gc, n, points, widths, sorted);
}
static Bool
glamor_get_spans_gl(DrawablePtr drawable, int wmax,
DDXPointPtr points, int *widths, int count, char *dst)
{
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;
int box_index;
int n;
char *d;
GLenum type;
GLenum format;
int off_x, off_y;
pixmap_priv = glamor_get_pixmap_private(pixmap);
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
goto bail;
glamor_get_drawable_deltas(drawable, pixmap, &off_x, &off_y);
glamor_format_for_pixmap(pixmap, &format, &type);
glamor_make_current(glamor_priv);
glamor_pixmap_loop(pixmap_priv, box_index) {
BoxPtr box = glamor_pixmap_box_at(pixmap_priv, box_index);
glamor_pixmap_fbo *fbo = glamor_pixmap_fbo_at(pixmap_priv, box_index);
glBindFramebuffer(GL_FRAMEBUFFER, fbo->fb);
glPixelStorei(GL_PACK_ALIGNMENT, 4);
d = dst;
for (n = 0; n < count; n++) {
int x1 = points[n].x + off_x;
int y = points[n].y + off_y;
int w = widths[n];
int x2 = x1 + w;
char *l;
l = d;
d += PixmapBytePad(w, drawable->depth);
/* clip */
if (x1 < box->x1) {
l += (box->x1 - x1) * (drawable->bitsPerPixel >> 3);
x1 = box->x1;
}
if (x2 > box->x2)
x2 = box->x2;
if (x1 >= x2)
continue;
if (y < box->y1)
continue;
if (y >= box->y2)
continue;
glReadPixels(x1 - box->x1, y - box->y1, x2 - x1, 1, format, type, l);
}
}
return TRUE;
bail:
return FALSE;
}
static void
glamor_get_spans_bail(DrawablePtr drawable, int wmax,
DDXPointPtr points, int *widths, int count, char *dst)
{
if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RO))
fbGetSpans(drawable, wmax, points, widths, count, dst);
glamor_finish_access(drawable);
}
void
glamor_get_spans(DrawablePtr drawable, int wmax,
DDXPointPtr points, int *widths, int count, char *dst)
{
if (glamor_get_spans_gl(drawable, wmax, points, widths, count, dst))
return;
glamor_get_spans_bail(drawable, wmax, points, widths, count, dst);
}
static Bool
glamor_set_spans_gl(DrawablePtr drawable, GCPtr gc, char *src,
DDXPointPtr points, int *widths, int numPoints, int sorted)
{
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;
int box_index;
int n;
char *s;
GLenum type;
GLenum format;
int off_x, off_y;
pixmap_priv = glamor_get_pixmap_private(pixmap);
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
goto bail;
if (gc->alu != GXcopy)
goto bail;
if (!glamor_pm_is_solid(gc->depth, gc->planemask))
goto bail;
glamor_get_drawable_deltas(drawable, pixmap, &off_x, &off_y);
glamor_format_for_pixmap(pixmap, &format, &type);
glamor_make_current(glamor_priv);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
glamor_pixmap_loop(pixmap_priv, box_index) {
BoxPtr box = glamor_pixmap_box_at(pixmap_priv, box_index);
glamor_pixmap_fbo *fbo = glamor_pixmap_fbo_at(pixmap_priv, box_index);
glamor_bind_texture(glamor_priv, GL_TEXTURE0, fbo, TRUE);
s = src;
for (n = 0; n < numPoints; n++) {
BoxPtr clip_box = RegionRects(gc->pCompositeClip);
int nclip_box = RegionNumRects(gc->pCompositeClip);
int w = widths[n];
int y = points[n].y;
int x = points[n].x;
while (nclip_box--) {
int x1 = x;
int x2 = x + w;
int y1 = y;
char *l = s;
/* clip to composite clip */
if (x1 < clip_box->x1) {
l += (clip_box->x1 - x1) * (drawable->bitsPerPixel >> 3);
x1 = clip_box->x1;
}
if (x2 > clip_box->x2)
x2 = clip_box->x2;
if (y < clip_box->y1)
continue;
if (y >= clip_box->y2)
continue;
/* adjust to pixmap coordinates */
x1 += off_x;
x2 += off_x;
y1 += off_y;
if (x1 < box->x1) {
l += (box->x1 - x1) * (drawable->bitsPerPixel >> 3);
x1 = box->x1;
}
if (x2 > box->x2)
x2 = box->x2;
if (x1 >= x2)
continue;
if (y1 < box->y1)
continue;
if (y1 >= box->y2)
continue;
glTexSubImage2D(GL_TEXTURE_2D, 0,
x1 - box->x1, y1 - box->y1, x2 - x1, 1,
format, type,
l);
}
s += PixmapBytePad(w, drawable->depth);
}
}
return TRUE;
bail:
return FALSE;
}
static void
glamor_set_spans_bail(DrawablePtr drawable, GCPtr gc, char *src,
DDXPointPtr points, int *widths, int numPoints, int sorted)
{
if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW) && glamor_prepare_access_gc(gc))
fbSetSpans(drawable, gc, src, points, widths, numPoints, sorted);
glamor_finish_access_gc(gc);
glamor_finish_access(drawable);
}
void
glamor_set_spans(DrawablePtr drawable, GCPtr gc, char *src,
DDXPointPtr points, int *widths, int numPoints, int sorted)
{
if (glamor_set_spans_gl(drawable, gc, src, points, widths, numPoints, sorted))
return;
glamor_set_spans_bail(drawable, gc, src, points, widths, numPoints, sorted);
}