glamor: Just set the logic op to what we want at the start of all rendering.

By dropping the unconditional logic op disable at the end of
rendering, this fixes GL errors being thrown in GLES2 contexts (which
don't have logic ops).  On desktop, this also means a little less
overhead per draw call from taking one less trip through the
glEnable/glDisable switch statement of doom in Mesa.

The exchange here is that we end up taking a trip through it in the
XV, Render, and gradient-generation paths.  If the glEnable() is
actually costly, we should probably cache our logic op state in our
screen, since there's no way the GL could make that switch statement
as cheap as the caller caching it would be.

v2: Don't forget to set the logic op in Xephyr's drawing.

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Keith Packard <keithp@keithp.com>

13 files changed, 25 insertions, 49 deletions

diff --git a/glamor/glamor_copy.c b/glamor/glamor_copy.c
index 609fcb396..1660ffd13 100644
--- a/glamor/glamor_copy.c
+++ b/glamor/glamor_copy.c
@@ -404,11 +404,9 @@ glamor_copy_fbo_fbo_draw(DrawablePtr src,
         glDisable(GL_SCISSOR_TEST);
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 
-    glDisable(GL_COLOR_LOGIC_OP);
     return TRUE;
 
 bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
     return FALSE;
 }
 
@@ -452,7 +450,6 @@ glamor_copy_fbo_fbo_temp(DrawablePtr src,
 
     if (!glamor_set_alu(screen, gc ? gc->alu : GXcopy))
         goto bail_ctx;
-    glDisable(GL_COLOR_LOGIC_OP);
 
     /* Find the size of the area to copy
      */
@@ -521,7 +518,6 @@ bail:
     return FALSE;
 
 bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
     return FALSE;
 }
 
diff --git a/glamor/glamor_dash.c b/glamor/glamor_dash.c
index 49ad3b623..4281ff0a8 100644
--- a/glamor/glamor_dash.c
+++ b/glamor/glamor_dash.c
@@ -159,11 +159,11 @@ glamor_dash_setup(DrawablePtr drawable, GCPtr gc)
                                        &glamor_priv->on_off_dash_line_progs,
                                        &glamor_facet_on_off_dash_lines);
         if (!prog)
-            goto bail_ctx;
+            goto bail;
         break;
     case LineDoubleDash:
         if (gc->fillStyle != FillSolid)
-            goto bail_ctx;
+            goto bail;
 
         prog = &glamor_priv->double_dash_line_prog;
 
@@ -171,18 +171,18 @@ glamor_dash_setup(DrawablePtr drawable, GCPtr gc)
             if (!glamor_build_program(screen, prog,
                                       &glamor_facet_double_dash_lines,
                                       NULL))
-                goto bail_ctx;
+                goto bail;
         }
 
         if (!glamor_use_program(pixmap, gc, prog, NULL))
-            goto bail_ctx;
+            goto bail;
 
         glamor_set_color(pixmap, gc->fgPixel, prog->fg_uniform);
         glamor_set_color(pixmap, gc->bgPixel, prog->bg_uniform);
         break;
 
     default:
-        goto bail_ctx;
+        goto bail;
     }
 
 
@@ -195,8 +195,6 @@ glamor_dash_setup(DrawablePtr drawable, GCPtr gc)
 
     return prog;
 
-bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
 bail:
     return NULL;
 }
@@ -230,7 +228,6 @@ glamor_dash_loop(DrawablePtr drawable, GCPtr gc, glamor_program *prog,
     }
 
     glDisable(GL_SCISSOR_TEST);
-    glDisable(GL_COLOR_LOGIC_OP);
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 }
 
diff --git a/glamor/glamor_glyphblt.c b/glamor/glamor_glyphblt.c
index 8c73f480c..1791f6dca 100644
--- a/glamor/glamor_glyphblt.c
+++ b/glamor/glamor_glyphblt.c
@@ -60,7 +60,7 @@ glamor_poly_glyph_blt_gl(DrawablePtr drawable, GCPtr gc,
                                    &glamor_priv->poly_glyph_blt_progs,
                                    &glamor_facet_poly_glyph_blt);
     if (!prog)
-        goto bail_ctx;
+        goto bail;
 
     glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
 
@@ -138,12 +138,9 @@ glamor_poly_glyph_blt_gl(DrawablePtr drawable, GCPtr gc,
         }
     }
 
-    glDisable(GL_COLOR_LOGIC_OP);
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 
     return TRUE;
-bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
 bail:
     return FALSE;
 }
@@ -191,7 +188,7 @@ glamor_push_pixels_gl(GCPtr gc, PixmapPtr bitmap,
                                    &glamor_priv->poly_glyph_blt_progs,
                                    &glamor_facet_poly_glyph_blt);
     if (!prog)
-        goto bail_ctx;
+        goto bail;
 
     glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
 
@@ -230,12 +227,9 @@ glamor_push_pixels_gl(GCPtr gc, PixmapPtr bitmap,
         glDrawArrays(GL_POINTS, 0, num_points);
     }
 
-    glDisable(GL_COLOR_LOGIC_OP);
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
     return TRUE;
 
-bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
 bail:
     return FALSE;
 }
diff --git a/glamor/glamor_gradient.c b/glamor/glamor_gradient.c
index 232b4023d..8ea645efc 100644
--- a/glamor/glamor_gradient.c
+++ b/glamor/glamor_gradient.c
@@ -993,6 +993,8 @@ glamor_generate_radial_gradient_picture(ScreenPtr screen,
          vertices, tex_vertices, 0))
         goto GRADIENT_FAIL;
 
+    glamor_set_alu(screen, GXcopy);
+
     /* Set all the stops and colors to shader. */
     if (stops_count > RADIAL_SMALL_STOPS) {
         stop_colors = malloc(4 * stops_count * sizeof(float));
@@ -1309,6 +1311,8 @@ glamor_generate_linear_gradient_picture(ScreenPtr screen,
          vertices, tex_vertices, 1))
         goto GRADIENT_FAIL;
 
+    glamor_set_alu(screen, GXcopy);
+
     /* Normalize the PTs. */
     glamor_set_normalize_pt(xscale, yscale,
                             pixman_fixed_to_double(src_picture->pSourcePict->
diff --git a/glamor/glamor_lines.c b/glamor/glamor_lines.c
index 6c8bb88a4..2dd9c07db 100644
--- a/glamor/glamor_lines.c
+++ b/glamor/glamor_lines.c
@@ -65,7 +65,7 @@ glamor_poly_lines_solid_gl(DrawablePtr drawable, GCPtr gc,
                                    &glamor_facet_poly_lines);
 
     if (!prog)
-        goto bail_ctx;
+        goto bail;
 
     /* Set up the vertex buffers for the points */
 
@@ -117,12 +117,9 @@ glamor_poly_lines_solid_gl(DrawablePtr drawable, GCPtr gc,
     }
 
     glDisable(GL_SCISSOR_TEST);
-    glDisable(GL_COLOR_LOGIC_OP);
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 
     return TRUE;
-bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
 bail:
     return FALSE;
 }
diff --git a/glamor/glamor_pixmap.c b/glamor/glamor_pixmap.c
index 0224b3415..89b4c366b 100644
--- a/glamor/glamor_pixmap.c
+++ b/glamor/glamor_pixmap.c
@@ -748,6 +748,7 @@ _glamor_upload_bits_to_pixmap_texture(PixmapPtr pixmap, GLenum format,
                                       int swap_rb, int x, int y, int w, int h,
                                       int stride, void *bits, int pbo)
 {
+    ScreenPtr screen = pixmap->drawable.pScreen;
     glamor_pixmap_private *pixmap_priv = glamor_get_pixmap_private(pixmap);
     glamor_screen_private *glamor_priv =
         glamor_get_screen_private(pixmap->drawable.pScreen);
@@ -833,6 +834,7 @@ _glamor_upload_bits_to_pixmap_texture(PixmapPtr pixmap, GLenum format,
         glEnableVertexAttribArray(GLAMOR_VERTEX_SOURCE);
 
         glamor_set_destination_pixmap_priv_nc(glamor_priv, pixmap, pixmap_priv);
+        glamor_set_alu(screen, GXcopy);
         __glamor_upload_pixmap_to_texture(pixmap, &tex,
                                           format, type, 0, 0, w, h, bits, pbo);
         glActiveTexture(GL_TEXTURE0);
@@ -1131,6 +1133,7 @@ glamor_es2_pixmap_read_prepare(PixmapPtr source, int x, int y, int w, int h,
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 
     glamor_set_destination_pixmap_fbo(glamor_priv, temp_fbo, 0, 0, w, h);
+    glamor_set_alu(screen, GXcopy);
     glUseProgram(glamor_priv->finish_access_prog[no_alpha]);
     glUniform1i(glamor_priv->finish_access_revert[no_alpha], revert);
     glUniform1i(glamor_priv->finish_access_swap_rb[no_alpha], swap_rb);
diff --git a/glamor/glamor_points.c b/glamor/glamor_points.c
index 01a1c7e39..df7e5a23f 100644
--- a/glamor/glamor_points.c
+++ b/glamor/glamor_points.c
@@ -55,17 +55,17 @@ glamor_poly_point_gl(DrawablePtr drawable, GCPtr gc, int mode, int npt, DDXPoint
     glamor_make_current(glamor_priv);
 
     if (prog->failed)
-        goto bail_ctx;
+        goto bail;
 
     if (!prog->prog) {
         if (!glamor_build_program(screen, prog,
                                   &glamor_facet_point,
                                   &glamor_fill_solid))
-            goto bail_ctx;
+            goto bail;
     }
 
     if (!glamor_use_program(pixmap, gc, prog, NULL))
-        goto bail_ctx;
+        goto bail;
 
     vbo_ppt = glamor_get_vbo_space(screen, npt * (2 * sizeof (INT16)), &vbo_offset);
     glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
@@ -102,13 +102,10 @@ glamor_poly_point_gl(DrawablePtr drawable, GCPtr gc, int mode, int npt, DDXPoint
     }
 
     glDisable(GL_SCISSOR_TEST);
-    glDisable(GL_COLOR_LOGIC_OP);
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 
     return TRUE;
 
-bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
 bail:
     return FALSE;
 }
diff --git a/glamor/glamor_rects.c b/glamor/glamor_rects.c
index 7161921de..c8c92be17 100644
--- a/glamor/glamor_rects.c
+++ b/glamor/glamor_rects.c
@@ -65,7 +65,7 @@ glamor_poly_fill_rect_gl(DrawablePtr drawable,
                                        &glamor_facet_polyfillrect_130);
 
         if (!prog)
-            goto bail_ctx;
+            goto bail;
 
         /* Set up the vertex buffers for the points */
 
@@ -87,7 +87,7 @@ glamor_poly_fill_rect_gl(DrawablePtr drawable,
                                        &glamor_facet_polyfillrect_120);
 
         if (!prog)
-            goto bail_ctx;
+            goto bail;
 
         /* Set up the vertex buffers for the points */
 
@@ -139,14 +139,11 @@ glamor_poly_fill_rect_gl(DrawablePtr drawable,
     }
 
     glDisable(GL_SCISSOR_TEST);
-    glDisable(GL_COLOR_LOGIC_OP);
     if (glamor_priv->glsl_version >= 130)
         glVertexAttribDivisor(GLAMOR_VERTEX_POS, 0);
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 
     return TRUE;
-bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
 bail:
     return FALSE;
 }
diff --git a/glamor/glamor_render.c b/glamor/glamor_render.c
index 6669f487e..27c09fd48 100644
--- a/glamor/glamor_render.c
+++ b/glamor/glamor_render.c
@@ -1172,6 +1172,7 @@ glamor_composite_with_shader(CARD8 op,
 
     glamor_set_destination_pixmap_priv_nc(glamor_priv, dest_pixmap, dest_pixmap_priv);
     glamor_composite_set_shader_blend(glamor_priv, dest_pixmap_priv, &key, shader, &op_info);
+    glamor_set_alu(screen, GXcopy);
 
     glamor_make_current(glamor_priv);
 
diff --git a/glamor/glamor_segs.c b/glamor/glamor_segs.c
index 6d469ced2..e16732565 100644
--- a/glamor/glamor_segs.c
+++ b/glamor/glamor_segs.c
@@ -109,12 +109,10 @@ glamor_poly_segment_solid_gl(DrawablePtr drawable, GCPtr gc,
     }
 
     glDisable(GL_SCISSOR_TEST);
-    glDisable(GL_COLOR_LOGIC_OP);
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 
     return TRUE;
 bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
 bail:
     return FALSE;
 }
diff --git a/glamor/glamor_spans.c b/glamor/glamor_spans.c
index fe8c7dc0f..7138db5a0 100644
--- a/glamor/glamor_spans.c
+++ b/glamor/glamor_spans.c
@@ -68,7 +68,7 @@ glamor_fill_spans_gl(DrawablePtr drawable,
                                        &glamor_facet_fillspans_130);
 
         if (!prog)
-            goto bail_ctx;
+            goto bail;
 
         /* Set up the vertex buffers for the points */
 
@@ -93,7 +93,7 @@ glamor_fill_spans_gl(DrawablePtr drawable,
                                        &glamor_facet_fillspans_120);
 
         if (!prog)
-            goto bail_ctx;
+            goto bail;
 
         /* Set up the vertex buffers for the points */
 
@@ -147,14 +147,11 @@ glamor_fill_spans_gl(DrawablePtr drawable,
     }
 
     glDisable(GL_SCISSOR_TEST);
-    glDisable(GL_COLOR_LOGIC_OP);
     if (glamor_priv->glsl_version >= 130)
         glVertexAttribDivisor(GLAMOR_VERTEX_POS, 0);
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 
     return TRUE;
-bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
 bail:
     return FALSE;
 }
diff --git a/glamor/glamor_text.c b/glamor/glamor_text.c
index 68593a403..c7c1ab738 100644
--- a/glamor/glamor_text.c
+++ b/glamor/glamor_text.c
@@ -210,7 +210,6 @@ glamor_text(DrawablePtr drawable, GCPtr gc,
     glDisableVertexAttribArray(GLAMOR_VERTEX_SOURCE);
     glVertexAttribDivisor(GLAMOR_VERTEX_POS, 0);
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
-    glDisable(GL_COLOR_LOGIC_OP);
 
     return x;
 }
@@ -286,18 +285,14 @@ glamor_poly_text(DrawablePtr drawable, GCPtr gc,
     prog = glamor_use_program_fill(pixmap, gc, &glamor_priv->poly_text_progs, &glamor_facet_poly_text);
 
     if (!prog)
-        goto bail_ctx;
+        goto bail;
 
     x = glamor_text(drawable, gc, glamor_font, prog,
                     x, y, count, chars, charinfo, sixteen);
 
-    glDisable(GL_COLOR_LOGIC_OP);
-
     *final_pos = x;
     return TRUE;
 
-bail_ctx:
-    glDisable(GL_COLOR_LOGIC_OP);
 bail:
     return FALSE;
 }
@@ -468,7 +463,6 @@ glamor_image_text(DrawablePtr drawable, GCPtr gc,
     return TRUE;
 
 bail:
-    glDisable(GL_COLOR_LOGIC_OP);
     return FALSE;
 }
 
diff --git a/glamor/glamor_xv.c b/glamor/glamor_xv.c
index 2d5b8e10f..364104ddd 100644
--- a/glamor/glamor_xv.c
+++ b/glamor/glamor_xv.c
@@ -286,6 +286,7 @@ glamor_xv_render(glamor_port_private *port_priv)
     glamor_get_drawable_deltas(port_priv->pDraw, port_priv->pPixmap, &dst_x_off,
                                &dst_y_off);
     glamor_set_destination_pixmap_priv_nc(glamor_priv, pixmap, pixmap_priv);
+    glamor_set_alu(screen, GXcopy);
 
     for (i = 0; i < 3; i++) {
         if (port_priv->src_pix[i]) {