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Viewing changes to glamor/glamor_rects.c

  • Committer: Alex Gerchanovsky
  • Date: 2016-05-05 01:15:19 UTC
  • Revision ID: alex@ubuntu-20160505011519-ew0mn8tsloglbowd
Initial 1.18.3-2

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glamor/glamor_rects.c
 
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/*
 
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 * Copyright © 2014 Keith Packard
 
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 *
 
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 * Permission to use, copy, modify, distribute, and sell this software and its
 
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 * documentation for any purpose is hereby granted without fee, provided that
 
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 * the above copyright notice appear in all copies and that both that copyright
 
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 * notice and this permission notice appear in supporting documentation, and
 
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 * that the name of the copyright holders not be used in advertising or
 
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 * publicity pertaining to distribution of the software without specific,
 
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 * written prior permission.  The copyright holders make no representations
 
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 * about the suitability of this software for any purpose.  It is provided "as
 
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 * is" without express or implied warranty.
 
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 *
 
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 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 
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 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 
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 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 
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 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 
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 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 
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 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 
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 * OF THIS SOFTWARE.
 
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 */
 
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#include "glamor_priv.h"
 
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#include "glamor_program.h"
 
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#include "glamor_transform.h"
 
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static const glamor_facet glamor_facet_polyfillrect_130 = {
 
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    .name = "poly_fill_rect",
 
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    .version = 130,
 
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    .vs_vars = "attribute vec4 primitive;\n",
 
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    .vs_exec = ("       vec2 pos = primitive.zw * vec2(gl_VertexID&1, (gl_VertexID&2)>>1);\n"
 
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                GLAMOR_POS(gl_Position, (primitive.xy + pos))),
 
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};
 
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static const glamor_facet glamor_facet_polyfillrect_120 = {
 
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    .name = "poly_fill_rect",
 
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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.xy)),
 
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};
 
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static Bool
 
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glamor_poly_fill_rect_gl(DrawablePtr drawable,
 
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                         GCPtr gc, int nrect, xRectangle *prect)
 
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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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    int off_x, off_y;
 
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    GLshort *v;
 
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    char *vbo_offset;
 
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    int box_index;
 
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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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    if (glamor_priv->glsl_version >= 130) {
 
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        prog = glamor_use_program_fill(pixmap, gc,
 
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                                       &glamor_priv->poly_fill_rect_program,
 
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                                       &glamor_facet_polyfillrect_130);
 
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        if (!prog)
 
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            goto bail;
 
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        /* Set up the vertex buffers for the points */
 
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        v = glamor_get_vbo_space(drawable->pScreen, nrect * sizeof (xRectangle), &vbo_offset);
 
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        glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
 
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        glVertexAttribDivisor(GLAMOR_VERTEX_POS, 1);
 
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        glVertexAttribPointer(GLAMOR_VERTEX_POS, 4, GL_SHORT, GL_FALSE,
 
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                              4 * sizeof (short), vbo_offset);
 
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        memcpy(v, prect, nrect * sizeof (xRectangle));
 
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        glamor_put_vbo_space(screen);
 
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    } else {
 
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        int n;
 
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        prog = glamor_use_program_fill(pixmap, gc,
 
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                                       &glamor_priv->poly_fill_rect_program,
 
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                                       &glamor_facet_polyfillrect_120);
 
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        if (!prog)
 
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            goto bail;
 
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        /* Set up the vertex buffers for the points */
 
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        v = glamor_get_vbo_space(drawable->pScreen, nrect * 8 * sizeof (short), &vbo_offset);
 
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        glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
 
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        glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE,
 
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                              2 * sizeof (short), vbo_offset);
 
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        for (n = 0; n < nrect; n++) {
 
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            v[0] = prect->x;                v[1] = prect->y;
 
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            v[2] = prect->x;                v[3] = prect->y + prect->height;
 
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            v[4] = prect->x + prect->width; v[5] = prect->y + prect->height;
 
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            v[6] = prect->x + prect->width; v[7] = prect->y;
 
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            prect++;
 
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            v += 8;
 
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        }
 
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        glamor_put_vbo_space(screen);
 
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    }
 
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    glEnable(GL_SCISSOR_TEST);
 
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    glamor_pixmap_loop(pixmap_priv, box_index) {
 
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        int nbox = RegionNumRects(gc->pCompositeClip);
 
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        BoxPtr box = RegionRects(gc->pCompositeClip);
 
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        glamor_set_destination_drawable(drawable, box_index, TRUE, FALSE,
 
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                                        prog->matrix_uniform, &off_x, &off_y);
 
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        while (nbox--) {
 
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            glScissor(box->x1 + off_x,
 
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                      box->y1 + off_y,
 
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                      box->x2 - box->x1,
 
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                      box->y2 - box->y1);
 
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            box++;
 
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            if (glamor_priv->glsl_version >= 130)
 
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                glDrawArraysInstanced(GL_TRIANGLE_STRIP, 0, 4, nrect);
 
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            else {
 
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                glamor_glDrawArrays_GL_QUADS(glamor_priv, nrect);
 
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            }
 
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        }
 
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    }
 
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    glDisable(GL_SCISSOR_TEST);
 
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    if (glamor_priv->glsl_version >= 130)
 
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        glVertexAttribDivisor(GLAMOR_VERTEX_POS, 0);
 
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    glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 
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    return TRUE;
 
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bail:
 
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    return FALSE;
 
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}
 
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static void
 
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glamor_poly_fill_rect_bail(DrawablePtr drawable,
 
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                           GCPtr gc, int nrect, xRectangle *prect)
 
148
{
 
149
    glamor_fallback("to %p (%c)\n", drawable,
 
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                    glamor_get_drawable_location(drawable));
 
151
    if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW) &&
 
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        glamor_prepare_access_gc(gc)) {
 
153
        fbPolyFillRect(drawable, gc, nrect, prect);
 
154
    }
 
155
    glamor_finish_access_gc(gc);
 
156
    glamor_finish_access(drawable);
 
157
}
 
158
 
 
159
void
 
160
glamor_poly_fill_rect(DrawablePtr drawable,
 
161
                      GCPtr gc, int nrect, xRectangle *prect)
 
162
{
 
163
    if (glamor_poly_fill_rect_gl(drawable, gc, nrect, prect))
 
164
        return;
 
165
    glamor_poly_fill_rect_bail(drawable, gc, nrect, prect);
 
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}