From 525e4c0beae832afc2c098c1368a19ad164e1b2b Mon Sep 17 00:00:00 2001 From: =?utf8?q?Kristian=20H=C3=B8gsberg?= Date: Mon, 14 Feb 2011 10:39:54 -0500 Subject: [PATCH] compositor: Clip repaint to the damage region Drop glScissor, and just clip the surface against the repaint region and render each rectangle in the resulting region. --- compositor/compositor.c | 98 ++++++++++++++++++++++++++++++------------------- compositor/compositor.h | 1 + 2 files changed, 62 insertions(+), 37 deletions(-) diff --git a/compositor/compositor.c b/compositor/compositor.c index e036938..afff961 100644 --- a/compositor/compositor.c +++ b/compositor/compositor.c @@ -360,10 +360,21 @@ background_create(struct wlsc_output *output, const char *filename) } static void -wlsc_surface_draw(struct wlsc_surface *es, struct wlsc_output *output) +wlsc_surface_draw(struct wlsc_surface *es, + struct wlsc_output *output, pixman_region32_t *clip) { struct wlsc_compositor *ec = es->compositor; - GLfloat vertices[4 * 4]; + GLfloat *v, inv_width, inv_height; + unsigned int *p; + pixman_region32_t repaint; + pixman_box32_t *rectangles; + int i, n; + + pixman_region32_init_rect(&repaint, + es->x, es->y, es->width, es->height); + pixman_region32_intersect(&repaint, &repaint, clip); + if (!pixman_region32_not_empty(&repaint)) + return; if (es->visual == &ec->compositor.argb_visual) { glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); @@ -375,34 +386,51 @@ wlsc_surface_draw(struct wlsc_surface *es, struct wlsc_output *output) glDisable(GL_BLEND); } - vertices[ 0] = es->x; - vertices[ 1] = es->y; - vertices[ 2] = 0.0; - vertices[ 3] = 0.0; - - vertices[ 4] = es->x; - vertices[ 5] = es->y + es->height; - vertices[ 6] = 0.0; - vertices[ 7] = 1.0; - - vertices[ 8] = es->x + es->width; - vertices[ 9] = es->y; - vertices[10] = 1.0; - vertices[11] = 0.0; - - vertices[12] = es->x + es->width; - vertices[13] = es->y + es->height; - vertices[14] = 1.0; - vertices[15] = 1.0; + rectangles = pixman_region32_rectangles(&repaint, &n); + v = wl_array_add(&ec->vertices, n * 16 * sizeof *v); + p = wl_array_add(&ec->indices, n * 6 * sizeof *p); + inv_width = 1.0 / es->width; + inv_height = 1.0 / es->height; + for (i = 0; i < n; i++, v += 16, p += 6) { + v[ 0] = rectangles[i].x1; + v[ 1] = rectangles[i].y1; + v[ 2] = (GLfloat) (rectangles[i].x1 - es->x) * inv_width; + v[ 3] = (GLfloat) (rectangles[i].y1 - es->y) * inv_height; + + v[ 4] = rectangles[i].x1; + v[ 5] = rectangles[i].y2; + v[ 6] = v[ 2]; + v[ 7] = (GLfloat) (rectangles[i].y2 - es->y) * inv_height; + + v[ 8] = rectangles[i].x2; + v[ 9] = rectangles[i].y1; + v[10] = (GLfloat) (rectangles[i].x2 - es->x) * inv_width; + v[11] = v[ 3]; + + v[12] = rectangles[i].x2; + v[13] = rectangles[i].y2; + v[14] = v[10]; + v[15] = v[ 7]; + + p[0] = i * 4 + 0; + p[1] = i * 4 + 1; + p[2] = i * 4 + 2; + p[3] = i * 4 + 2; + p[4] = i * 4 + 1; + p[5] = i * 4 + 3; + } glBindTexture(GL_TEXTURE_2D, es->texture); - glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, - 4 * sizeof(GLfloat), vertices); - glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, - 4 * sizeof(GLfloat), &vertices[2]); + v = ec->vertices.data; + glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]); + glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]); glEnableVertexAttribArray(0); glEnableVertexAttribArray(1); - glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); + glDrawElements(GL_TRIANGLES, n * 6, GL_UNSIGNED_INT, ec->indices.data); + + ec->vertices.size = 0; + ec->indices.size = 0; + pixman_region32_fini(&repaint); } static void @@ -442,7 +470,6 @@ wlsc_output_repaint(struct wlsc_output *output) struct wlsc_surface *es; struct wlsc_input_device *eid; pixman_region32_t new_damage, total_damage; - pixman_box32_t *extents; glViewport(0, 0, output->width, output->height); @@ -461,20 +488,16 @@ wlsc_output_repaint(struct wlsc_output *output) &output->previous_damage_region); pixman_region32_copy(&output->previous_damage_region, &new_damage); - extents = pixman_region32_extents(&total_damage); - glEnable(GL_SCISSOR_TEST); - glScissor(extents->x1, extents->y1, - extents->x2 - extents->x1, extents->y2 - extents->y1); - es = container_of(ec->surface_list.next, struct wlsc_surface, link); if (es->map_type == WLSC_SURFACE_MAP_FULLSCREEN && es->fullscreen_output == output) { if (es->width < output->width || es->height < output->height) glClear(GL_COLOR_BUFFER_BIT); - wlsc_surface_draw(es, output); + wlsc_surface_draw(es, output, &total_damage); } else { if (output->background) - wlsc_surface_draw(output->background, output); + wlsc_surface_draw(output->background, + output, &total_damage); else glClear(GL_COLOR_BUFFER_BIT); @@ -483,16 +506,17 @@ wlsc_output_repaint(struct wlsc_output *output) ec->switcher->current == es) continue; - wlsc_surface_draw(es, output); + wlsc_surface_draw(es, output, &total_damage); } } if (ec->switcher) - wlsc_surface_draw(ec->switcher->current, output); + wlsc_surface_draw(ec->switcher->current, + output, &total_damage); if (ec->focus) wl_list_for_each(eid, &ec->input_device_list, link) - wlsc_surface_draw(eid->sprite, output); + wlsc_surface_draw(eid->sprite, output, &total_damage); } static void diff --git a/compositor/compositor.h b/compositor/compositor.h index 61bb5c8..b0901e8 100644 --- a/compositor/compositor.h +++ b/compositor/compositor.h @@ -112,6 +112,7 @@ struct wlsc_compositor { int repaint_on_timeout; struct timespec previous_swap; pixman_region32_t damage_region; + struct wl_array vertices, indices; struct wlsc_switcher *switcher; uint32_t focus; -- 2.7.4