From 7413076f82670e65555d9e99d1cd791a89bf82e3 Mon Sep 17 00:00:00 2001 From: Jonny Lamb Date: Tue, 26 Nov 2013 18:19:46 +0100 Subject: [PATCH] compositor: transform surface coordinates if a surface scaler is used Implements wl_surface_scaler.set by setting desired src_{x,y,width,height} and dst_{width,height} values in the weston_buffer_viewport struct, then altering coordinates in weston_surface_to_buffer* functions if there is a scaler set for said surface. --- src/compositor.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++------ src/compositor.h | 13 +++++++++ 2 files changed, 89 insertions(+), 8 deletions(-) diff --git a/src/compositor.c b/src/compositor.c index 8a6ff38..5169921 100644 --- a/src/compositor.c +++ b/src/compositor.c @@ -475,10 +475,13 @@ weston_surface_create(struct weston_compositor *compositor) surface->buffer_viewport.transform = WL_OUTPUT_TRANSFORM_NORMAL; surface->buffer_viewport.scale = 1; + surface->buffer_viewport.scaler_set = 0; surface->pending.buffer_viewport = surface->buffer_viewport; surface->output = NULL; surface->pending.newly_attached = 0; + surface->surface_scaler_resource = NULL; + pixman_region32_init(&surface->damage); pixman_region32_init(&surface->opaque); region_init_infinite(&surface->input); @@ -705,15 +708,38 @@ weston_transformed_region(int width, int height, free(dest_rects); } +static void +scaler_surface_to_buffer(struct weston_surface *surface, + float sx, float sy, float *bx, float *by) +{ + if (surface->buffer_viewport.scaler_set) { + double a, b; + + a = sx / surface->buffer_viewport.dst_width; + b = a * wl_fixed_to_double(surface->buffer_viewport.src_width); + *bx = b + wl_fixed_to_double(surface->buffer_viewport.src_x); + + a = sy / surface->buffer_viewport.dst_height; + b = a * wl_fixed_to_double(surface->buffer_viewport.src_height); + *by = b + wl_fixed_to_double(surface->buffer_viewport.src_y); + } else { + *bx = sx; + *by = sy; + } +} + WL_EXPORT void weston_surface_to_buffer_float(struct weston_surface *surface, float sx, float sy, float *bx, float *by) { + /* first transform coordinates if the scaler is set */ + scaler_surface_to_buffer(surface, sx, sy, bx, by); + weston_transformed_coord(surface->width, surface->height, surface->buffer_viewport.transform, surface->buffer_viewport.scale, - sx, sy, bx, by); + *bx, *by, bx, by); } WL_EXPORT void @@ -722,11 +748,9 @@ weston_surface_to_buffer(struct weston_surface *surface, { float bxf, byf; - weston_transformed_coord(surface->width, - surface->height, - surface->buffer_viewport.transform, - surface->buffer_viewport.scale, - sx, sy, &bxf, &byf); + weston_surface_to_buffer_float(surface, + sx, sy, &bxf, &byf); + *bx = floorf(bxf); *by = floorf(byf); } @@ -735,6 +759,17 @@ WL_EXPORT pixman_box32_t weston_surface_to_buffer_rect(struct weston_surface *surface, pixman_box32_t rect) { + float xf, yf; + + /* first transform box coordinates if the scaler is set */ + scaler_surface_to_buffer(surface, rect.x1, rect.y1, &xf, &yf); + rect.x1 = floorf(xf); + rect.y1 = floorf(yf); + + scaler_surface_to_buffer(surface, rect.x2, rect.y2, &xf, &yf); + rect.x2 = floorf(xf); + rect.y2 = floorf(yf); + return weston_transformed_rect(surface->width, surface->height, surface->buffer_viewport.transform, @@ -1252,6 +1287,12 @@ weston_surface_set_size_from_buffer(struct weston_surface *surface) return; } + if (surface->buffer_viewport.scaler_set) { + surface->width = surface->buffer_viewport.dst_width; + surface->height = surface->buffer_viewport.dst_height; + return; + } + switch (surface->buffer_viewport.transform) { case WL_OUTPUT_TRANSFORM_90: case WL_OUTPUT_TRANSFORM_270: @@ -2054,6 +2095,7 @@ weston_surface_commit(struct weston_surface *surface) /* wl_surface.set_buffer_transform */ /* wl_surface.set_buffer_scale */ + /* wl_surface_scaler.set */ surface->buffer_viewport = surface->pending.buffer_viewport; /* wl_surface.attach */ @@ -2279,6 +2321,7 @@ weston_subsurface_commit_from_cache(struct weston_subsurface *sub) /* wl_surface.set_buffer_transform */ /* wl_surface.set_buffer_scale */ + /* wl_surface_scaler.set */ surface->buffer_viewport = sub->cached.buffer_viewport; /* wl_surface.attach */ @@ -3405,6 +3448,11 @@ weston_output_transform_coordinate(struct weston_output *output, static void destroy_surface_scaler(struct wl_resource *resource) { + struct weston_surface *surface = + wl_resource_get_user_data(resource); + + surface->surface_scaler_resource = NULL; + surface->pending.buffer_viewport.scaler_set = 0; } static void @@ -3424,6 +3472,11 @@ surface_scaler_set(struct wl_client *client, int32_t dst_width, int32_t dst_height) { + struct weston_surface *surface = + wl_resource_get_user_data(resource); + + assert(surface->surface_scaler_resource != NULL); + if (wl_fixed_to_double(src_width) < 0 || wl_fixed_to_double(src_height) < 0) { wl_resource_post_error(resource, @@ -3442,7 +3495,14 @@ surface_scaler_set(struct wl_client *client, return; } - /* TODO */ + surface->pending.buffer_viewport.scaler_set = 1; + + surface->pending.buffer_viewport.src_x = src_x; + surface->pending.buffer_viewport.src_y = src_y; + surface->pending.buffer_viewport.src_width = src_width; + surface->pending.buffer_viewport.src_height = src_height; + surface->pending.buffer_viewport.dst_width = dst_width; + surface->pending.buffer_viewport.dst_height = dst_height; } static const struct wl_surface_scaler_interface surface_scaler_interface = { @@ -3466,7 +3526,13 @@ scaler_get_surface_scaler(struct wl_client *client, struct weston_surface *surface = wl_resource_get_user_data(surface_resource); struct wl_resource *resource; - /* TODO: check we don't already have one for this surface */ + if (surface->surface_scaler_resource) { + wl_resource_post_error(scaler, + WL_SCALER_ERROR_SCALER_EXISTS, + "a surface scaler for that surface already exists"); + return; + } + resource = wl_resource_create(client, &wl_surface_scaler_interface, 1, id); if (resource == NULL) { @@ -3476,6 +3542,8 @@ scaler_get_surface_scaler(struct wl_client *client, wl_resource_set_implementation(resource, &surface_scaler_interface, surface, destroy_surface_scaler); + + surface->surface_scaler_resource = resource; } static const struct wl_scaler_interface scaler_interface = { diff --git a/src/compositor.h b/src/compositor.h index f32a497..2b9bb6e 100644 --- a/src/compositor.h +++ b/src/compositor.h @@ -658,6 +658,15 @@ struct weston_buffer_viewport { /* wl_surface.set_scaling_factor */ int32_t scale; + + /* bool for whether wl_surface_scaler.set has been + * called yet (before this is called there is no + * cropping or scaling on the surface) */ + int scaler_set; /* bool */ + + wl_fixed_t src_x, src_y; + wl_fixed_t src_width, src_height; + int32_t dst_width, dst_height; }; struct weston_region { @@ -851,6 +860,9 @@ struct weston_surface { struct weston_buffer_viewport buffer_viewport; int keep_buffer; /* bool for backends to prevent early release */ + /* wl_surface_scaler resource for this surface */ + struct wl_resource *surface_scaler_resource; + /* All the pending state, that wl_surface.commit will apply. */ struct { /* wl_surface.attach */ @@ -874,6 +886,7 @@ struct weston_surface { /* wl_surface.set_buffer_transform */ /* wl_surface.set_scaling_factor */ + /* wl_surface_scaler.set */ struct weston_buffer_viewport buffer_viewport; } pending; -- 2.7.4