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output: Introduce wlr_output_state_copy()
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38d451bcb5
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4b7c526578
2 changed files with 49 additions and 1 deletions
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@ -690,12 +690,24 @@ void wlr_output_state_set_damage(struct wlr_output_state *state,
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* advantage of backend features that may reduce the amount of things that
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* need to be composited.
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*
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* The array must be kept valid by the caller until wlr_output_state_finish().
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* The array must be kept valid by the caller until wlr_output_state_finish()
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* and all copies of the state have been finished as well.
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* This state will be applied once wlr_output_commit_state() is called.
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*/
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void wlr_output_state_set_layers(struct wlr_output_state *state,
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struct wlr_output_layer_state *layers, size_t layers_len);
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/**
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* Copies the output state from src to dst. It is safe to then
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* wlr_output_state_finish() src and have dst still be valid.
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*
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* Note: The lifetime of the output layers inside the state are not managed. It
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* is the responsibility of the constructor of the output layers to make sure
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* they remain valid for the output state and all copies made.
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*/
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bool wlr_output_state_copy(struct wlr_output_state *dst,
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const struct wlr_output_state *src);
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/**
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* Re-configure the swapchain as required for the output's primary buffer.
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@ -129,3 +129,39 @@ void wlr_output_state_set_layers(struct wlr_output_state *state,
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state->layers = layers;
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state->layers_len = layers_len;
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}
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bool wlr_output_state_copy(struct wlr_output_state *dst,
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const struct wlr_output_state *src) {
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struct wlr_output_state copy = *src;
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copy.committed &= ~(WLR_OUTPUT_STATE_BUFFER |
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WLR_OUTPUT_STATE_DAMAGE |
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WLR_OUTPUT_STATE_GAMMA_LUT);
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if (src->committed & WLR_OUTPUT_STATE_BUFFER) {
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wlr_output_state_set_buffer(©, src->buffer);
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}
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if (src->committed & WLR_OUTPUT_STATE_DAMAGE) {
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wlr_output_state_set_damage(©, &src->damage);
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}
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if (src->committed & WLR_OUTPUT_STATE_GAMMA_LUT) {
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size_t gamma_buffer_size = 3 * src->gamma_lut_size * sizeof(uint16_t);
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copy.gamma_lut = malloc(gamma_buffer_size);
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if (!copy.gamma_lut) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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goto err;
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}
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copy.committed |= WLR_OUTPUT_STATE_GAMMA_LUT;
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memcpy(copy.gamma_lut, src->gamma_lut, gamma_buffer_size);
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copy.gamma_lut_size = src->gamma_lut_size;
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}
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wlr_output_state_finish(dst);
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*dst = copy;
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return true;
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err:
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wlr_output_state_finish(©);
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return false;
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}
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