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Fallback gamma on legacy if properties don't exist
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1 changed files with 10 additions and 0 deletions
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@ -201,6 +201,12 @@ static bool atomic_crtc_set_gamma(struct wlr_drm_backend *drm,
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uint32_t size) {
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uint32_t size) {
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struct drm_color_lut gamma[size];
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struct drm_color_lut gamma[size];
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// Fallback to legacy gamma interface when gamma properties are not available
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// (can happen on older intel gpu's that support gamma but not degamma)
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if (crtc->props.gamma_lut == 0) {
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return legacy_iface.crtc_set_gamma(drm, crtc, r, g, b, size);
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}
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for (uint32_t i = 0; i < size; i++) {
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for (uint32_t i = 0; i < size; i++) {
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gamma[i].red = r[i];
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gamma[i].red = r[i];
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gamma[i].green = g[i];
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gamma[i].green = g[i];
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@ -227,6 +233,10 @@ static uint32_t atomic_crtc_get_gamma_size(struct wlr_drm_backend *drm,
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struct wlr_drm_crtc *crtc) {
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struct wlr_drm_crtc *crtc) {
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uint64_t gamma_lut_size;
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uint64_t gamma_lut_size;
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if (crtc->props.gamma_lut_size == 0) {
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return legacy_iface.crtc_get_gamma_size(drm, crtc);
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}
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if (!wlr_drm_get_prop(drm->fd, crtc->id, crtc->props.gamma_lut_size,
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if (!wlr_drm_get_prop(drm->fd, crtc->id, crtc->props.gamma_lut_size,
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&gamma_lut_size)) {
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&gamma_lut_size)) {
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wlr_log(L_ERROR, "Unable to get gamma lut size");
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wlr_log(L_ERROR, "Unable to get gamma lut size");
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