[PATCH v2 1/2] Implement pixman renderer
Vasily Khoruzhick
anarsoul at gmail.com
Mon Jan 7 09:39:49 PST 2013
This renderer could be used when there's no graphic accelerator available,
for example in (future) KMS and fbdev backends.
Signed-off-by: Vasily Khoruzhick <anarsoul at gmail.com>
---
v2: - follow libc convention of error handling
- improve commit message
src/Makefile.am | 1 +
src/pixman-renderer.c | 380 ++++++++++++++++++++++++++++++++++++++++++++++++++
src/pixman-renderer.h | 38 +++++
3 files changed, 419 insertions(+)
create mode 100644 src/pixman-renderer.c
create mode 100644 src/pixman-renderer.h
diff --git a/src/Makefile.am b/src/Makefile.am
index 2eade1d..14e283e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -36,6 +36,7 @@ weston_SOURCES = \
gl-renderer.h \
gl-renderer.c \
noop-renderer.c \
+ pixman-renderer.c \
../shared/matrix.c \
../shared/matrix.h \
weston-launch.h \
diff --git a/src/pixman-renderer.c b/src/pixman-renderer.c
new file mode 100644
index 0000000..1747408
--- /dev/null
+++ b/src/pixman-renderer.c
@@ -0,0 +1,380 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ * Copyright © 2013 Vasily Khoruzhick <anarsoul at gmail.com>
+ *
+ * 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.
+ */
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include "pixman-renderer.h"
+
+struct pixman_output_state {
+ pixman_image_t *hw_buffer;
+};
+
+struct pixman_surface_state {
+ pixman_image_t *image;
+ struct weston_buffer_reference buffer_ref;
+};
+
+struct pixman_renderer {
+ struct weston_renderer base;
+};
+
+static inline struct pixman_output_state *
+get_output_state(struct weston_output *output)
+{
+ return (struct pixman_output_state *)output->renderer_state;
+}
+
+static inline struct pixman_surface_state *
+get_surface_state(struct weston_surface *surface)
+{
+ return (struct pixman_surface_state *)surface->renderer_state;
+}
+
+static inline struct pixman_renderer *
+get_renderer(struct weston_compositor *ec)
+{
+ return (struct pixman_renderer *)ec->renderer;
+}
+
+static int
+pixman_renderer_read_pixels(struct weston_output *output,
+ pixman_format_code_t format, void *pixels,
+ uint32_t x, uint32_t y,
+ uint32_t width, uint32_t height)
+{
+ struct pixman_output_state *po = get_output_state(output);
+ pixman_image_t *out_buf;
+ uint32_t cur_y;
+
+ if (!po->hw_buffer) {
+ errno = ENODEV;
+ return -1;
+ }
+
+ out_buf = pixman_image_create_bits(format,
+ width,
+ height,
+ pixels,
+ (PIXMAN_FORMAT_BPP(format) / 8) * width);
+
+ /* Caller expects vflipped image */
+ for (cur_y = y; cur_y < y + height; cur_y++) {
+ pixman_image_composite32(PIXMAN_OP_SRC,
+ po->hw_buffer, /* src */
+ NULL /* mask */,
+ out_buf, /* dest */
+ x, cur_y, /* src_x, src_y */
+ 0, 0, /* mask_x, mask_y */
+ 0, height - (cur_y - y), /* dest_x, dest_y */
+ width, /* width */
+ 1 /* height */);
+ }
+
+ pixman_image_unref(out_buf);
+
+ return 0;
+}
+
+static void
+repaint_region(struct weston_surface *es, struct weston_output *output,
+ pixman_region32_t *region, pixman_region32_t *surf_region,
+ pixman_op_t pixman_op)
+{
+ struct pixman_surface_state *ps = get_surface_state(es);
+ struct pixman_output_state *po = get_output_state(output);
+ pixman_region32_t final_region;
+ pixman_box32_t *rects;
+ int nrects, i, src_x, src_y;
+ float surface_x, surface_y;
+
+ /* The final region to be painted is the intersection of
+ * 'region' and 'surf_region'. However, 'region' is in the global
+ * coordinates, and 'surf_region' is in the surface-local
+ * coordinates
+ */
+ pixman_region32_init(&final_region);
+ pixman_region32_copy(&final_region, surf_region);
+
+ if (es->transform.enabled) {
+ weston_surface_to_global_float(es, 0, 0, &surface_x, &surface_y);
+ pixman_region32_translate(&final_region, (int)surface_x, (int)surface_y);
+ } else
+ pixman_region32_translate(&final_region, es->geometry.x, es->geometry.y);
+
+ /* That's what we need to paint */
+ pixman_region32_intersect(&final_region, &final_region, region);
+
+ rects = pixman_region32_rectangles(&final_region, &nrects);
+
+ for (i = 0; i < nrects; i++) {
+ weston_surface_from_global(es, rects[i].x1, rects[i].y1, &src_x, &src_y);
+ pixman_image_composite32(pixman_op,
+ ps->image, /* src */
+ NULL /* mask */,
+ po->hw_buffer, /* dest */
+ src_x, src_y, /* src_x, src_y */
+ 0, 0, /* mask_x, mask_y */
+ rects[i].x1, rects[i].y1, /* dest_x, dest_y */
+ rects[i].x2 - rects[i].x1, /* width */
+ rects[i].y2 - rects[i].y1 /* height */);
+ }
+ pixman_region32_fini(&final_region);
+}
+
+static void
+draw_surface(struct weston_surface *es, struct weston_output *output,
+ pixman_region32_t *damage) /* in global coordinates */
+{
+ struct pixman_surface_state *ps = get_surface_state(es);
+ /* repaint bounding region in global coordinates: */
+ pixman_region32_t repaint;
+ /* non-opaque region in surface coordinates: */
+ pixman_region32_t surface_blend;
+
+ /* No buffer attached */
+ if (!ps->image)
+ return;
+
+ pixman_region32_init(&repaint);
+ pixman_region32_intersect(&repaint,
+ &es->transform.boundingbox, damage);
+ pixman_region32_subtract(&repaint, &repaint, &es->clip);
+
+ if (!pixman_region32_not_empty(&repaint))
+ goto out;
+
+ if (output->zoom.active) {
+ weston_log("pixman renderer does not support zoom\n");
+ goto out;
+ }
+
+ /* blended region is whole surface minus opaque region: */
+ pixman_region32_init_rect(&surface_blend, 0, 0,
+ es->geometry.width, es->geometry.height);
+ pixman_region32_subtract(&surface_blend, &surface_blend, &es->opaque);
+
+ if (pixman_region32_not_empty(&es->opaque)) {
+ repaint_region(es, output, &repaint, &es->opaque, PIXMAN_OP_SRC);
+ }
+
+ if (pixman_region32_not_empty(&surface_blend)) {
+ repaint_region(es, output, &repaint, &surface_blend, PIXMAN_OP_OVER);
+ }
+
+ pixman_region32_fini(&surface_blend);
+
+out:
+ pixman_region32_fini(&repaint);
+}
+static void
+repaint_surfaces(struct weston_output *output, pixman_region32_t *damage)
+{
+ struct weston_compositor *compositor = output->compositor;
+ struct weston_surface *surface;
+
+ wl_list_for_each_reverse(surface, &compositor->surface_list, link)
+ if (surface->plane == &compositor->primary_plane)
+ draw_surface(surface, output, damage);
+}
+
+static void
+pixman_renderer_repaint_output(struct weston_output *output,
+ pixman_region32_t *output_damage)
+{
+ struct pixman_output_state *po = get_output_state(output);
+
+ if (!po->hw_buffer)
+ return;
+
+ repaint_surfaces(output, output_damage);
+
+ pixman_region32_copy(&output->previous_damage, output_damage);
+ wl_signal_emit(&output->frame_signal, output);
+
+ /* Actual flip should be done by caller */
+}
+
+static void
+pixman_renderer_flush_damage(struct weston_surface *surface)
+{
+ /* No-op for pixman renderer */
+}
+
+static void
+pixman_renderer_attach(struct weston_surface *es, struct wl_buffer *buffer)
+{
+ struct pixman_surface_state *ps = get_surface_state(es);
+ pixman_format_code_t pixman_format;
+
+ weston_buffer_reference(&ps->buffer_ref, buffer);
+
+ if (ps->image) {
+ pixman_image_unref(ps->image);
+ ps->image = NULL;
+ }
+
+ if (!buffer)
+ return;
+
+ if (!wl_buffer_is_shm(buffer)) {
+ weston_log("Pixman renderer supports only SHM buffers\n");
+ weston_buffer_reference(&ps->buffer_ref, NULL);
+ return;
+ }
+
+ switch (wl_shm_buffer_get_format(buffer)) {
+ case WL_SHM_FORMAT_XRGB8888:
+ pixman_format = PIXMAN_x8r8g8b8;
+ break;
+ case WL_SHM_FORMAT_ARGB8888:
+ pixman_format = PIXMAN_a8r8g8b8;
+ break;
+ default:
+ weston_log("Unsupported SHM buffer format\n");
+ weston_buffer_reference(&ps->buffer_ref, NULL);
+ return;
+ break;
+ }
+ ps->image = pixman_image_create_bits(pixman_format,
+ wl_shm_buffer_get_width(buffer),
+ wl_shm_buffer_get_height(buffer),
+ wl_shm_buffer_get_data(buffer),
+ wl_shm_buffer_get_stride(buffer));
+}
+
+static int
+pixman_renderer_create_surface(struct weston_surface *surface)
+{
+ struct pixman_surface_state *ps;
+
+ ps = calloc(1, sizeof *ps);
+ if (!ps)
+ return -1;
+
+ surface->renderer_state = ps;
+
+ return 0;
+}
+
+static void
+pixman_renderer_surface_set_color(struct weston_surface *es,
+ float red, float green, float blue, float alpha)
+{
+ struct pixman_surface_state *ps = get_surface_state(es);
+ pixman_color_t color;
+
+ color.red = red * 0xffff;
+ color.green = green * 0xffff;
+ color.blue = blue * 0xffff;
+ color.alpha = alpha * 0xffff;
+
+ if (ps->image) {
+ pixman_image_unref(ps->image);
+ ps->image = NULL;
+ }
+
+ ps->image = pixman_image_create_solid_fill(&color);
+}
+
+static void
+pixman_renderer_destroy_surface(struct weston_surface *surface)
+{
+ struct pixman_surface_state *ps = get_surface_state(surface);
+
+ if (ps->image) {
+ pixman_image_unref(ps->image);
+ ps->image = NULL;
+ }
+ weston_buffer_reference(&ps->buffer_ref, NULL);
+ free(ps);
+}
+
+WL_EXPORT void
+pixman_renderer_destroy(struct weston_compositor *ec)
+{
+ free(ec->renderer);
+ ec->renderer = NULL;
+}
+
+WL_EXPORT int
+pixman_renderer_init(struct weston_compositor *ec)
+{
+ struct weston_renderer *renderer;
+
+ renderer = malloc(sizeof *renderer);
+ if (renderer == NULL)
+ return -1;
+
+ renderer->read_pixels = pixman_renderer_read_pixels;
+ renderer->repaint_output = pixman_renderer_repaint_output;
+ renderer->flush_damage = pixman_renderer_flush_damage;
+ renderer->attach = pixman_renderer_attach;
+ renderer->create_surface = pixman_renderer_create_surface;
+ renderer->surface_set_color = pixman_renderer_surface_set_color;
+ renderer->destroy_surface = pixman_renderer_destroy_surface;
+ ec->renderer = renderer;
+
+ return 0;
+}
+
+WL_EXPORT void
+pixman_renderer_output_set_buffer(struct weston_output *output, pixman_image_t *buffer)
+{
+ struct pixman_output_state *po = get_output_state(output);
+
+ if (po->hw_buffer)
+ pixman_image_unref(po->hw_buffer);
+ po->hw_buffer = buffer;
+
+ if (po->hw_buffer) {
+ output->compositor->read_format = pixman_image_get_format(po->hw_buffer);
+ pixman_image_ref(po->hw_buffer);
+ }
+}
+
+WL_EXPORT int
+pixman_renderer_output_create(struct weston_output *output)
+{
+ struct pixman_output_state *po = calloc(1, sizeof *po);
+
+ if (!po)
+ return -1;
+
+ output->renderer_state = po;
+
+ return 0;
+}
+
+WL_EXPORT void
+pixman_renderer_output_destroy(struct weston_output *output)
+{
+ struct pixman_output_state *po = get_output_state(output);
+
+ pixman_image_unref(po->hw_buffer);
+ po->hw_buffer = NULL;
+
+ free(po);
+}
diff --git a/src/pixman-renderer.h b/src/pixman-renderer.h
new file mode 100644
index 0000000..9920999
--- /dev/null
+++ b/src/pixman-renderer.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2013 Vasily Khoruzhick <anarsoul at gmail.com>
+ *
+ * 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 "compositor.h"
+
+void
+pixman_renderer_destroy(struct weston_compositor *ec);
+
+int
+pixman_renderer_init(struct weston_compositor *ec);
+
+int
+pixman_renderer_output_create(struct weston_output *output);
+
+void
+pixman_renderer_output_set_buffer(struct weston_output *output, pixman_image_t *buffer);
+
+void
+pixman_renderer_output_destroy(struct weston_output *output);
--
1.8.1
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