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transactions: save and render subsurface buffers

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This commit is contained in:
Isaac Freund
2020-06-09 23:13:14 +02:00
parent 052c8e1dcb
commit 48ea771310
3 changed files with 76 additions and 50 deletions
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53
river/render.zig
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@ -136,36 +136,35 @@ fn renderLayer(output: Output, layer: std.TailQueue(LayerSurface), now: *c.times
}
fn renderView(output: Output, view: *View, now: *c.timespec) void {
// If we have a stashed buffer, we are in the middle of a transaction
// and need to render that buffer until the transaction is complete.
if (view.stashed_buffer) |buffer| {
var box = c.wlr_box{
.x = view.current_box.x,
.y = view.current_box.y,
.width = @intCast(c_int, view.current_box.width),
.height = @intCast(c_int, view.current_box.height),
};
// If we have saved buffers, we are in the middle of a transaction
// and need to render those buffers until the transaction is complete.
if (view.saved_buffers.items.len != 0) {
for (view.saved_buffers.items) |saved_buffer| {
var box = saved_buffer.box.toWlrBox();
box.x += view.current_box.x;
box.y += view.current_box.y;
// Scale the box to the output's current scaling factor
scaleBox(&box, output.wlr_output.scale);
// Scale the box to the output's current scaling factor
scaleBox(&box, output.wlr_output.scale);
var matrix: [9]f32 = undefined;
c.wlr_matrix_project_box(
&matrix,
&box,
.WL_OUTPUT_TRANSFORM_NORMAL,
0.0,
&output.wlr_output.transform_matrix,
);
var matrix: [9]f32 = undefined;
c.wlr_matrix_project_box(
&matrix,
&box,
.WL_OUTPUT_TRANSFORM_NORMAL,
0.0,
&output.wlr_output.transform_matrix,
);
// This takes our matrix, the texture, and an alpha, and performs the actual
// rendering on the GPU.
_ = c.wlr_render_texture_with_matrix(
output.getRenderer(),
buffer.texture,
&matrix,
1.0,
);
// This takes our matrix, the texture, and an alpha, and performs the actual
// rendering on the GPU.
_ = c.wlr_render_texture_with_matrix(
output.getRenderer(),
saved_buffer.wlr_buffer.texture,
&matrix,
1.0,
);
}
} else {
// Since there is no stashed buffer, we are not in the middle of
// a transaction and may simply render each toplevel surface.